fix(installer): close detector false-pass gaps

Co-authored-by: be-coder-08 <[email protected]>

.woodpecker/greenfield-install.yml

@@ -0,0 +1,68 @@
+# C1 detector gate. The fixture itself is intentionally RED; CI is green only
+# when its exact phase verdicts/reasons match the versioned expected-RED manifest.
+when:
+  - event: [pull_request, manual]
+  - event: push
+    branch: [next, main]
+
+steps:
+  greenfield-git-present:
+    image: node:22-bookworm-slim
+    commands:
+      - |
+        set +e
+        MOSAIC_GREENFIELD_CONTAINER=1 \
+          bash tools/e2e-install-test.sh --lane next --source checkout --git present \
+          > /tmp/greenfield-git-present.log 2>&1
+        fixture_status=$?
+        set -e
+        cat /tmp/greenfield-git-present.log
+        bash tools/verify-greenfield-expected-red.sh \
+          next-git-present /tmp/greenfield-git-present.log "$fixture_status"
+
+  greenfield-main-git-present:
+    image: node:22-bookworm-slim
+    commands:
+      - |
+        set +e
+        MOSAIC_GREENFIELD_CONTAINER=1 \
+          bash tools/e2e-install-test.sh --lane main --source checkout --git present \
+          > /tmp/greenfield-main-git-present.log 2>&1
+        fixture_status=$?
+        set -e
+        cat /tmp/greenfield-main-git-present.log
+        bash tools/verify-greenfield-expected-red.sh \
+          main-git-present /tmp/greenfield-main-git-present.log "$fixture_status"
+
+  greenfield-remote-installer-contract:
+    image: node:22-bookworm-slim
+    commands:
+      - |
+        expected="$(awk 'NF {print $1; exit}' tools/install.sh.sha256)"
+        actual="$(sha256sum tools/install.sh | awk '{print $1}')"
+        test "$actual" = "$expected"
+        set +e
+        MOSAIC_GREENFIELD_CONTAINER=1 \
+          MOSAIC_FIXTURE_INSTALLER_URL="https://git.mosaicstack.dev/mosaicstack/stack/raw/commit/${CI_COMMIT_SHA}/tools/install.sh" \
+          MOSAIC_FIXTURE_INSTALLER_SHA256="$expected" \
+          bash tools/e2e-install-test.sh --lane next --source remote --git present \
+          > /tmp/greenfield-remote.log 2>&1
+        fixture_status=$?
+        set -e
+        cat /tmp/greenfield-remote.log
+        bash tools/verify-greenfield-expected-red.sh \
+          next-git-present /tmp/greenfield-remote.log "$fixture_status"
+
+  greenfield-git-absent:
+    image: node:22-bookworm-slim
+    commands:
+      - |
+        set +e
+        MOSAIC_GREENFIELD_CONTAINER=1 \
+          bash tools/e2e-install-test.sh --lane next --source checkout --git absent \
+          > /tmp/greenfield-git-absent.log 2>&1
+        fixture_status=$?
+        set -e
+        cat /tmp/greenfield-git-absent.log
+        bash tools/verify-greenfield-expected-red.sh \
+          next-git-absent /tmp/greenfield-git-absent.log "$fixture_status"

README.md

@@ -7,20 +7,21 @@ Mosaic gives you a unified launcher for Claude Code, Codex, OpenCode, and Pi —
 ## Quick Install
 
 ```bash
-curl -fsSL https://mosaicstack.dev/install.sh | bash
+d="$(mktemp -d)" && trap 'rm -rf "$d"' EXIT && curl -fsSL -o "$d/install.sh" https://git.mosaicstack.dev/mosaicstack/stack/raw/branch/main/tools/install.sh -o "$d/install.sh.sha256" https://git.mosaicstack.dev/mosaicstack/stack/raw/branch/main/tools/install.sh.sha256 && (cd "$d" && test -s install.sh && sha256sum -c install.sh.sha256 && bash install.sh)
 ```
 
-Or use the direct URL:
-
-```bash
-bash <(curl -fsSL https://git.mosaicstack.dev/mosaicstack/stack/raw/branch/main/tools/install.sh)
-```
+The published installer body must be non-empty and match its versioned SHA-256
+sidecar before it executes. A failed fetch, HTTP-200 empty body, or digest
+mismatch is fatal. Because both files come from the same repository and trust
+domain, this detects corruption or inconsistent publication—not repository or
+server compromise. Independently signed release provenance is explicitly
+deferred by the greenfield-install PRD.
 
 The installer auto-launches the setup wizard, which walks you through gateway install and verification. Flags for non-interactive use:
 
 ```bash
-bash <(curl -fsSL …) --yes               # Accept all defaults
-bash <(curl -fsSL …) --yes --no-auto-launch  # Install only, skip wizard
+(cd "$d" && bash install.sh --yes)                   # Accept all defaults
+(cd "$d" && bash install.sh --yes --no-auto-launch)  # Install only, skip wizard
 ```
 
 This installs both components:
@@ -30,6 +31,16 @@ This installs both components:
 | **Framework**           | Bash launcher, guides, runtime configs, tools, skills            | `~/.config/mosaic/`  |
 | **@mosaicstack/mosaic** | Unified `mosaic` CLI — TUI, gateway client, wizard, auto-updater | `~/.npm-global/bin/` |
 
+### Install lanes
+
+| Lane                     | Command                               | Use when                                              | Source                                                                                      |
+| ------------------------ | ------------------------------------- | ----------------------------------------------------- | ------------------------------------------------------------------------------------------- |
+| Stable                   | `bash tools/install.sh`               | You want the released Mosaic CLI/framework            | npm registry `@mosaicstack/mosaic@latest` + framework archive at `main`                     |
+| Prerelease integration   | `bash tools/install.sh --next`        | You want the current `next` integration branch        | Exact `@next` CLI/gateway versions + pinned `next` framework commit; pinned-source fallback |
+| Contributor/source build | `bash tools/install.sh --dev --ref X` | You are testing a branch before release; `--ref` wins | Build-from-source at the requested ref                                                      |
+
+`--next` selects the prerelease integration lane. It installs the exact CLI/gateway versions resolved from the aligned `@next` tags, and pins the framework archive to the resolved `next` commit. If the registry path fails, it builds from that pinned source. An explicit `--ref` or `MOSAIC_REF` wins and selects source mode.
+
 After install, the wizard runs automatically or you can invoke it manually:
 
 ```bash
@@ -38,10 +49,14 @@ mosaic wizard        # Full guided setup (gateway install → verify)
 
 ### Requirements
 
-- Node.js ≥ 20
-- npm (for global @mosaicstack/mosaic install)
+- Linux x86_64 with glibc (Debian is the greenfield CI platform; musl/Alpine, macOS, and ARM64 currently fail as unsupported)
+- Node.js ≥ 20 and npm ≥ 9
+- `bash`, `curl`, `git`, `python3`, `tar`, and standard core utilities (`awk`, `df`, `find`, `flock`, `grep`, `install`, `realpath`, `sed`, `sha256sum`, `stat`, `sync`)
+- At least 256 MiB free disk and 1,000 free inodes at the npm prefix
 - One or more runtimes: [Claude Code](https://docs.anthropic.com/en/docs/claude-code), [Codex](https://github.com/openai/codex), [OpenCode](https://opencode.ai), or [Pi](https://github.com/mariozechner/pi-coding-agent)
 
+The installer evaluates canonical phases P0–P9 and does not print `Done.` unless every committed postcondition passes. A failed phase exits non-zero, names the phase, and points to its durable journal under `${XDG_STATE_HOME:-~/.local/state}/mosaic/install/`. See [Installer state machine and recovery](docs/guides/installer-state-machine.md).
+
 ## Usage
 
 ### Launching Agent Sessions
@@ -334,16 +349,10 @@ Each stage has a dispatch mode (`exec` for research/review, `yolo` for coding),
 
 ## Upgrading
 
-Run the installer again — it handles upgrades automatically:
+Run the same verified installer flow again — it handles upgrades automatically:
 
 ```bash
-curl -fsSL https://mosaicstack.dev/install.sh | bash
-```
-
-Or use the direct URL:
-
-```bash
-bash <(curl -fsSL https://git.mosaicstack.dev/mosaicstack/stack/raw/branch/main/tools/install.sh)
+d="$(mktemp -d)" && trap 'rm -rf "$d"' EXIT && curl -fsSL -o "$d/install.sh" https://git.mosaicstack.dev/mosaicstack/stack/raw/branch/main/tools/install.sh -o "$d/install.sh.sha256" https://git.mosaicstack.dev/mosaicstack/stack/raw/branch/main/tools/install.sh.sha256 && (cd "$d" && test -s install.sh && sha256sum -c install.sh.sha256 && bash install.sh)
 ```
 
 Or use the CLI:
@@ -358,15 +367,17 @@ The CLI also performs a background update check on every invocation (cached for
 ### Installer Flags
 
 ```bash
-bash tools/install.sh --check           # Version check only
+bash tools/install.sh --check           # Side-effect-free P0-P8 postcondition check
 bash tools/install.sh --framework       # Framework only (skip npm CLI)
 bash tools/install.sh --cli             # npm CLI only (skip framework)
-bash tools/install.sh --ref v1.0        # Install from a specific git ref
+bash tools/install.sh --next            # Prerelease lane: exact @next versions + pinned-source fallback
+bash tools/install.sh --dev             # Contributor lane: source build at --ref/main
+bash tools/install.sh --ref v1.0        # Install from a specific git ref (--ref wins over --next)
 bash tools/install.sh --yes             # Non-interactive, accept all defaults
 bash tools/install.sh --no-auto-launch  # Skip auto-launch of wizard
 ```
 
-The installer rejects unrecognized flags or positional arguments before making changes and prints the supported-option usage.
+The installer rejects unrecognized flags or positional arguments before making changes and prints the supported-option usage. `--check` reports one PASS/FAIL row for each P0–P8 predicate and exits non-zero if any row fails; it does not create the npm prefix, lock, journal, manifest, or runtime files.
 
 ## Contributing
 

docs/PRD.md

@@ -1368,3 +1368,42 @@ All work is **alpha** (< 0.1.0) until Jason approves 0.1.0 beta release.
 10. ASSUMPTION: **Conversations and messages get their own PG tables** (not stored in brain's entity model). They follow a chat-specific schema with proper foreign keys to users and projects. Rationale: Chat has different access patterns (streaming, pagination, search) than brain entities.
 
 11. RESOLVED: **Pi handles all target LLM providers natively.** Anthropic, OpenAI/Codex, Z.ai, Ollama, LM Studio, and llama.cpp are all supported via Pi's built-in providers or `models.json` configuration with `openai-completions` API type. No custom provider adapters needed in @mosaicstack/agent — only configuration management.
+
+---
+
+## Greenfield install correctness — C1 (#1050)
+
+### Problem and objective
+
+A from-zero install can report success while leaving the target host unusable because the installer has no transactional state machine capable of certifying its own postconditions. C1 supplies the structural spine and red-first fixture; later cards repair the individual failed postconditions.
+
+### Normative requirements
+
+1. The installer SHALL implement the canonical P0–P9 numbering from the greenfield-install PRD v2: P0 Resolve context; P1 Preflight; P2 Acquire artifacts; P3 Install CLI; P4 Install framework + skills; P5 Identity; P6 Runtime linking / activation; P7 Services; P8 Shell discoverability; P9 Verify + commit. P2 is scoped to installer-distribution artifacts and SHALL NOT foreclose credentialed downstream acquisition. P5 owns validating any credential capability required by requested downstream work; P7 may provision credential-dependent resources only after that P5 postcondition commits.
+2. Every phase SHALL declare preconditions, action, committed postconditions, and rollback. An unverifiable postcondition SHALL fail the install non-zero with the named phase and a remediation line; no best-effort failure may still certify success. P1's required-tool closure includes tools invoked by later phases, including `git`; a downstream prerequisite may not remain undeclared and degrade silently.
+3. A durable mutation journal SHALL open before the first mutation and commit at P9. Fallible command output needed to diagnose a phase SHALL be journaled and surfaced, never discarded.
+4. `--check` SHALL run exactly the P0–P8 postcondition predicates without mutation, report each phase PASS/FAIL, and exit non-zero if any predicate fails.
+5. P4 SHALL consume a checkout-free, lane/versioned shipped-set declaration published by the installer. C1 SHALL NOT select among the currently disagreeing framework-payload, repository-root, sync-source, and W-jarvis populations; while no declaration exists, P4 reports `NOT-MEASURED / UNDECLARED` and remains blocking rather than fabricating a count. C5 owns the declaration's contents and containment/loadability fulfillment.
+6. The from-zero fixture SHALL be lane-parametric, use Debian/glibc, run the documented install command as a non-root target user with an isolated HOME, and inherit no host credentials, npm cache, home directory, or runtime configuration.
+7. The fixture SHALL select `next` with `--next` or `MOSAIC_NEXT=1` and assert the resolved lane version. Internal predicates use P3's absolute CLI path; shell discoverability is tested only at P8.
+8. Fault injection after each P2–P8 phase SHALL prove either clean rollback or a durable, honestly reported resumable partial state, with no journal incorrectly left in progress.
+9. Unsupported musl/Alpine and unavailable Docker SHALL fail loudly rather than skip as pass. The repository's installer tests SHALL nevertheless run in the canonical Alpine CI image by explicitly modeling a supported non-root/glibc target and using portable filesystem enumeration.
+10. P0 SHALL bind the effective uid and username to the authoritative passwd HOME and shell and state/reject unsafe root or sudo-with-inherited-HOME privilege contexts.
+11. Created paths SHALL satisfy phase-specific target owner/group and mode policy: P3 executables are not group/world writable, framework/runtime trees are not group/world writable, and identity/credential material is private.
+12. The expected-RED comparator SHALL validate the complete manifest before selecting a case: exact case population, one exit and P0–P9 disposition per case, pinned require/forbid classes, and no malformed, duplicate, or unknown rows.
+13. The published installer contract SHALL reject failed fetches, HTTP-success empty bodies, and digest mismatch, then execute the exact digest-verified body. The remote CI arm SHALL bind that body to the immutable CI commit.
+14. Phase diagnostics SHALL be redacted before terminal or durable-log output. A seeded positive-control canary SHALL remain absent from observed argv, output, command logs, npm configuration, generated files, and shell history.
+
+### C1 acceptance criteria
+
+1. The pre-C1 from-zero matrix records both discriminating controls: with `git` absent, the legacy installer still exits zero while P1 fails and skill sync degrades; with `git` present, P1 passes and the observed sync store/runtime links are 101/101. The C1 installer must fail at P1 before mutation when `git` is absent.
+2. The discriminating P3 row passes: the binary exists at the expected absolute path and reports exactly the resolved `next` lane version, while P4, P5, and P8 fail.
+3. The `--check` mutation negative control proves host fingerprints are byte-identical before and after observation.
+4. Woodpecker executes and validates the expected RED fixture plus the immutable remote-installer contract; C1 does not repair P4/P5/P8 or activate #869.
+5. Negative controls prove manifest shrink/duplicates/unknown rows fail, unsafe P0/P3/P4/P5 contexts fail, the P2–P8 fault seam enters real actions rather than synthetic writes, empty/mismatched fetched bodies fail, and a deliberately emitted secret canary is redacted from every persisted/output population.
+
+### Explicit exclusions and dependencies
+
+- C2 owns P8/PATH, C3 owns P5/headless identity, C4 owns P6 activation policy, and C5 owns P4/skills.
+- Main-lane execution is a promotion precondition owned by #1037; C1 only makes the fixture lane-parametric.
+- RM-02 and #869 activation are out of scope.

docs/SITEMAP.md

@@ -9,6 +9,11 @@
 - [Whole mutator-class gate](architecture/mutator-class-gate.md) — default-deny policy, revoke-first/promote-last state machine, TTL, runtime adapters, and T-B/T-C assurance boundary.
 - [Compaction revocation lifecycle](architecture/compaction-revocation.md) — Claude/Pi observer matrix, same-PID generation rollover, failure fencing, and the named bounded residual stale window.
 
+## Installation and upgrades
+
+- [Installer state machine and recovery](guides/installer-state-machine.md) — canonical P0–P9 phases, side-effect-free checks, durable journal states, rollback/remediation, and the Debian greenfield CI gate.
+- [Upgrade safety and recovery](guides/upgrade-safety-and-recovery.md) — framework ownership, durable operator snapshots, verify net, and projection regeneration.
+
 ## CLI and skill management
 
 - [Skill registration user guide](guides/user-guide.md#claude-code-skill-registration) — register, unregister, list statuses, automatic install/update reconciliation, and Claude reload behavior.

docs/guides/installer-state-machine.md

@@ -0,0 +1,99 @@
+# Installer State Machine and Recovery
+
+The unified installer uses a transactional P0–P9 model. It may report success only after P9 reasserts every applicable committed postcondition. Internal phases invoke the CLI by P3's absolute path; shell discovery is checked only at P8.
+
+## Canonical phases
+
+| Phase                           | Responsibility                                                                                                                    | Failure disposition                                                              |
+| ------------------------------- | --------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------- |
+| P0 Resolve context              | Bind uid/username to the authoritative passwd HOME/shell, state privilege mode, architecture, libc, Node, and npm                 | Fail before mutation                                                             |
+| P1 Preflight                    | Validate downstream tool closure (including `git` and `python3`), writable prefix, registry lane, disk/inodes, and exclusive lock | Fail before target mutation                                                      |
+| P2 Acquire artifacts            | Resolve exact registry versions and an immutable framework commit; record lane and SHA-256                                        | Discard temporary work                                                           |
+| P3 Install CLI                  | Install at the configured absolute prefix; require exact version plus target owner/group and non-writable executable mode         | Restore the prior prefix/npmrc snapshot                                          |
+| P4 Install framework + skills   | Sync framework and consume a checkout-free, lane/versioned shipped-skill declaration                                              | Restore prior framework/runtime trees                                            |
+| P5 Identity                     | Validate SOUL/USER content and private modes; require private credential storage and target owner/group                           | Restore generated identity/credential binding                                    |
+| P6 Runtime linking / activation | Evaluate activation honestly; never treat dead enforcement hooks as active readiness                                              | Restore runtime activation files                                                 |
+| P7 Services                     | Provision only requested services/resources after any required P5 credential commits                                              | Stop and restore requested services/resources                                    |
+| P8 Shell discoverability        | Require fresh login and non-login shells of the actual target shell to resolve P3's path                                          | Restore shell profiles                                                           |
+| P9 Verify + commit              | Re-run P0–P8, commit the manifest, and seal the journal                                                                           | Leave an honestly reported resumable failure or restore the pre-install snapshot |
+
+The phase numbers are a cross-workstream contract and must not be renumbered.
+
+## Side-effect-free check
+
+```bash
+bash tools/install.sh --check          # stable/latest lane
+bash tools/install.sh --check --next   # prerelease lane
+```
+
+`--check`:
+
+- emits exactly one `[P0]` through `[P8]` PASS/FAIL row;
+- exits non-zero if any predicate fails;
+- does not create the npm prefix, lock, journal, manifest, shell profile, or runtime file;
+- uses temporary npm observation storage outside the target HOME and removes it before exit.
+
+P4 currently fails as `NOT-MEASURED / UNDECLARED` until the installer publishes `~/.config/mosaic/.install-shipped-skills.json`. C1 deliberately does not select among the conflicting candidate populations; C5 owns publishing and fulfilling that declaration. Once present, the P4 predicate requires the declaration's lane/version to match the resolved install and every named skill to remain contained under `skills/<name>/SKILL.md` with matching loadable frontmatter.
+
+## Durable journal
+
+Each mutating run creates a private transaction directory:
+
+```text
+${XDG_STATE_HOME:-~/.local/state}/mosaic/install/
+  active.json
+  <UTC-run-id>/
+    journal.ndjson
+    journal.ndjson.sha256   # committed runs only
+    commands.log
+    snapshot/
+```
+
+Before each mutation scope is touched, `journal.ndjson` records:
+
+- phase and path;
+- whether prior state existed and where its snapshot lives;
+- the reversal action;
+- the captured command-output location and command status.
+
+Journal, action-status, manifest, or command-log write/sync failure is fatal. An unrecorded mutation is not allowed. Command diagnostics are redacted before terminal output or durable logging; credential-shaped environment values, bearer values, auth tokens, and credentialed URLs are never deliberately persisted. Successful P9 runs append a seal event, write the SHA-256 sidecar, and make the journal and sidecar read-only. Required P4/P6 action failures are persisted in the manifest so a later `--check` cannot turn a failed action into a false pass.
+
+Rollback roots must be non-overlapping, non-symlinked, target-user-owned strict descendants of canonical `HOME`; unsafe custom `MOSAIC_HOME`/`MOSAIC_PREFIX` values fail at P0. The same validation runs again immediately before recursive rollback. The OS lock is concurrency authority: if a process dies while `active.json` still says `in-progress`, a retry that acquires the free lock preserves the stale projection as `prior-active.json` and proceeds from the honestly retained partial state.
+
+`active.json` is the current projection:
+
+- `in-progress`: incomplete/open transaction;
+- `rolled-back`: a fault restored the snapshot;
+- `rollback-failed`: restoration failed or refused a replaced/unsafe target and requires manual recovery;
+- `failed-resumable`: named postconditions failed and the recorded partial state remains for remediation;
+- `committed`: P9 passed and the journal is sealed.
+
+## Failure recovery
+
+1. Read the named phase and remediation line from installer stderr.
+2. Inspect `active.json`, then the referenced `journal.ndjson` and `commands.log`. Command output needed to diagnose a failure is preserved and surfaced; it is not redirected away.
+3. For `rolled-back`, verify the target paths match their pre-install state before retrying.
+4. For `failed-resumable`, repair the named phase owner requirement, then run `install.sh --check` before retrying the installer.
+5. Do not activate the #869 enforcement hooks merely to turn P6 green. A broker-less host with those hooks is a failed P6 state.
+
+## Greenfield CI gate
+
+`.woodpecker/greenfield-install.yml` runs `tools/e2e-install-test.sh` from zero in Debian/glibc as a non-root uid with `env -i`. No host HOME, npm cache, credentials, or bind mount enters the target process. Checkout mode packages the complete current checkout into an archive, pins its SHA-256 through an internal fixture seam, and copies the self-contained fixture into the container; framework-installer changes in the PR are therefore exercised rather than fetched from an older remote branch.
+
+The C1 fixture intentionally returns an attributable RED while C2–C5 remain open. CI itself remains green only when the fixture's final P0–P9 verdicts, required discriminator rows, seeded secret-canary scan, and non-zero exit match the versioned contract in `tools/fixtures/greenfield-expected-red.tsv`. The comparator validates the complete three-case schema before selecting a case: exactly one exit and P0–P9 disposition per case, pinned require/forbid populations, and no duplicate or unknown rows. Any later remediation that changes an observed verdict makes CI red until the owning lane deliberately updates that manifest:
+
+- `git` present: P1 and strict P3 pass; P4/P5/P6/P8 fail for their own reasons; P9 refuses success.
+- `git` absent: P1 fails before target mutation and the installer emits no `Done.`.
+
+The fixture is lane-parametric:
+
+```bash
+bash tools/e2e-install-test.sh --lane next --git present
+bash tools/e2e-install-test.sh --lane main --git present
+```
+
+CI exercises both lane parameters as expected-RED structural checks. A separate remote-contract arm fetches the installer at the immutable CI commit, rejects failed or empty HTTP-success bodies, compares it to the reviewed `tools/install.sh.sha256`, and executes that exact fetched artifact. The P2–P8 fault matrix runs the real phase actions (including the P3 npm path, P4 framework path, and wizard path) rather than synthetic representative writes, then compares the complete target tree to its pre-install fingerprint. Delivery targets `main` under the trunk-only merge rule; `next` remains a non-merging integration lane. The linked installer issue stays open after merge and closes only after Jarvis independently validates the greenfield behavior.
+
+## Source trust boundary
+
+Remote installer mode requires a non-empty body and an expected SHA-256 before execution. Remote source-archive mode separately pins the resolved commit, records the archive SHA-256, limits compressed/expanded size and entry count, and rejects traversal, links, devices, and special files before extraction. These controls provide immutable run provenance and archive safety, not an independent signing root. Signed artifact metadata/provenance is explicitly deferred by the canonical greenfield PRD; C1 does not invent a signing system. The checkout and remote CI seams verify reviewed digests before executing their artifacts.

docs/guides/upgrade-safety-and-recovery.md

@@ -12,6 +12,20 @@ with no snapshot to fall back to.
 Protection is layered. Each layer is independent; a later layer catches what an
 earlier one misses.
 
+## Layer 0 — Transaction journal (install-wide recovery)
+
+The unified installer opens a private journal under
+`${XDG_STATE_HOME:-~/.local/state}/mosaic/install/` before the first target
+mutation. Every mutation scope records its path, prior snapshot, and reversal
+instructions before it is touched. Journal write/sync failure is fatal, and P9
+seals successful journals with a SHA-256 sidecar. See
+[Installer state machine and recovery](./installer-state-machine.md).
+
+This transaction journal is distinct from the retained operator-only backup
+below. The transaction journal is required for correctness and rollback;
+Layer 2's durable backup remains a separately stated, fail-open recovery bonus
+for a manifest bug that the normal transaction did not detect.
+
 ## Layer 1 — Manifest-owned sync (prevention)
 
 The single source of truth for ownership is

docs/reports/verification/1050-b8-redaction-control/01-exact-failing-assertion.txt

@@ -0,0 +1,14 @@
+subject_head=3edde464b3891ad439019fcc19aad7728e4c2fb8
+source=git show HEAD:tools/install-next-lane.test.sh
+
+   477	  echo 'credentialed URL userinfo leaked to terminal output' >&2; exit 1
+   478	fi
+   479	[[ "$(grep -oF '[REDACTED]@' <<<"$OUTPUT" | wc -l | tr -d ' ')" -ge 5 ]] \
+   480	  || { echo 'credentialed URL redaction controls were not all exercised' >&2; exit 1; }
+   481	secret_active="$TMP/secret-state/active.json"
+--
+   525	  echo 'framework nested capture leaked credential diagnostics' >&2; exit 1
+   526	fi
+   527	[[ "$(grep -oF '[REDACTED]@' "$framework_log" | wc -l | tr -d ' ')" -ge 5 ]] \
+   528	  || { echo 'framework URL redaction controls were not exercised' >&2; exit 1; }
+   529

docs/reports/verification/1050-b8-redaction-control/02-exact-masked-log-and-image-probe.txt

@@ -0,0 +1,16 @@
+source=/tmp/c1-ci-next-x.log (exact failing canonical-image xtrace)
+credential material is already replaced by the redactor token [REDACTED]; no live secret is reproduced
+
+  urls=https://[REDACTED]@example.com/a https://[REDACTED]@example.net/b https://[REDACTED]@example.org/c https://[REDACTED]@example.dev/d https://[REDACTED]@example.io/e
+  urls=https://[REDACTED]@example.com/a https://[REDACTED]@example.net/b https://[REDACTED]@example.org/c https://[REDACTED]@example.dev/d https://[REDACTED]@example.io/e
+
+line_count=2
+occurrence_count=10
+observed_assertion_value=2 (from xtrace: [[ 2 -ge 5 ]])
+
+canonical-image discriminator (same locally cached digest as failing run):
+image_id=sha256:d40fb1a218b72d3dcbf8a427a5076facf2a6d958b6854e6bbd057f7264540841 repo_digests=["git.mosaicstack.dev/mosaicstack/stack/ci-base@sha256:0f1d996a6cfcc09e6dcf979ee66c872a1b0be4f1bfde852b4790f520ddd0d776"]
+busybox=BusyBox v1.37.0 (2026-01-10 15:38:28 UTC)
+regex_-o_single_line=5
+fixed_-oF_single_line=1
+fixed_-oF_two_lines=2

docs/reports/verification/1050-b8-redaction-control/03-positive-control-result.txt

@@ -0,0 +1,14 @@
+positive_control_exit=1
+seeded_line=https://[MASKED-USERINFO]@example.io/e (actual synthetic userinfo intentionally omitted here)
+expected_failure=credentialed URL redaction control missing for example.io
+transcript_tail:
+[test] --next fast path pins resolved package versions
+[test] fast path failure falls back to source build
+[test] source-build failure is fatal and restores the pre-install prefix
+[test] corrupt source archive is fatal and restores the pre-install prefix
+[test] --dev source install does not require registry version resolution
+[test] explicit --ref keeps source lane and avoids @next lookup
+[test] --check --next rejects mismatched prerelease pipeline suffixes
+[test] full framework path receives P3 absolute CLI without relying on PATH
+[test] captured diagnostics redact seeded credential canary everywhere
+credentialed URL redaction control missing for example.io

docs/reports/verification/1050-b8-redaction-control/positive-control.log

@@ -0,0 +1,10 @@
+[test] --next fast path pins resolved package versions
+[test] fast path failure falls back to source build
+[test] source-build failure is fatal and restores the pre-install prefix
+[test] corrupt source archive is fatal and restores the pre-install prefix
+[test] --dev source install does not require registry version resolution
+[test] explicit --ref keeps source lane and avoids @next lookup
+[test] --check --next rejects mismatched prerelease pipeline suffixes
+[test] full framework path receives P3 absolute CLI without relying on PATH
+[test] captured diagnostics redact seeded credential canary everywhere
+credentialed URL redaction control missing for example.io

docs/reports/verification/1050-b8-redaction-control/positive-control.test.sh

@@ -0,0 +1,578 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT="/work"
+TMP="$(mktemp -d "${TMPDIR:-/tmp}/mosaic-next-install-test-XXXXXX")"
+trap 'rm -rf "$TMP"' EXIT
+export TMPDIR="$TMP/runtime-tmp"
+mkdir -p "$TMPDIR"
+
+FAKE_BIN="$TMP/bin"
+HOME_DIR="$TMP/home"
+PREFIX="$HOME_DIR/prefix"
+MOSAIC_HOME="$HOME_DIR/mosaic"
+STATE="$TMP/state"
+LOG="$TMP/npm.log"
+mkdir -p "$FAKE_BIN" "$HOME_DIR" "$STATE"
+
+# Model the supported non-root/glibc target explicitly even when this harness
+# itself runs as root in Alpine/BusyBox CI.
+cat > "$FAKE_BIN/id" <<'FAKE_ID'
+#!/usr/bin/env bash
+case "${1:-}" in
+  -u) echo 1001 ;;
+  -g) echo 1001 ;;
+  -un) echo fixture-user ;;
+  *) exec /bin/id "$@" ;;
+esac
+FAKE_ID
+cat > "$FAKE_BIN/getent" <<FAKE_GETENT
+#!/usr/bin/env bash
+printf 'fixture-user:x:1001:1001::%s:/bin/bash\n' '$HOME_DIR'
+FAKE_GETENT
+cat > "$FAKE_BIN/ldd" <<'FAKE_LDD'
+#!/usr/bin/env bash
+printf 'ldd (GNU libc) 2.36\n'
+FAKE_LDD
+cat > "$FAKE_BIN/stat" <<'FAKE_STAT'
+#!/usr/bin/env bash
+if [[ "${1:-} ${2:-}" == '-c %u' ]]; then
+  [[ "${3:-}" == "${MOSAIC_TEST_WRONG_OWNER_PATH:-__none__}" ]] && echo 9999 || echo 1001
+  exit 0
+fi
+if [[ "${1:-} ${2:-}" == '-c %g' ]]; then
+  [[ "${3:-}" == "${MOSAIC_TEST_WRONG_GROUP_PATH:-__none__}" ]] && echo 9999 || echo 1001
+  exit 0
+fi
+exec /bin/stat "$@"
+FAKE_STAT
+cat > "$FAKE_BIN/realpath" <<'FAKE_REALPATH'
+#!/usr/bin/env python3
+import os, sys
+args=sys.argv[1:]
+mode=args.pop(0) if args and args[0] in ('-e','-m') else '-m'
+if args and args[0]=='--': args.pop(0)
+if len(args)!=1 or (mode=='-e' and not os.path.exists(args[0])): raise SystemExit(1)
+print(os.path.realpath(args[0]))
+FAKE_REALPATH
+chmod 0755 "$FAKE_BIN/id" "$FAKE_BIN/getent" "$FAKE_BIN/ldd" "$FAKE_BIN/stat" "$FAKE_BIN/realpath"
+
+cat > "$FAKE_BIN/npm" <<'FAKE_NPM'
+#!/usr/bin/env bash
+set -euo pipefail
+LOG="${MOSAIC_TEST_NPM_LOG:?}"
+STATE="${MOSAIC_TEST_STATE:?}"
+echo "$*" >> "$LOG"
+
+if [[ "${1:-}" == "--version" ]]; then
+  echo "10.6.2"
+  exit 0
+fi
+
+install_cli() {
+  local version="$1"
+  echo "$version" > "$STATE/mosaic"
+  mkdir -p "${MOSAIC_PREFIX:?}/bin"
+  cat > "$MOSAIC_PREFIX/bin/mosaic" <<CLI
+#!/usr/bin/env bash
+set -euo pipefail
+if [[ "\${1:-}" == "wizard" ]]; then
+  printf 'wizard\n' >> "\${MOSAIC_TEST_NPM_LOG:?}"
+  mkdir -p "\${MOSAIC_HOME:?}" "\${HOME:?}/.config/mosaic-gateway"
+  printf '# Soul\\n\\nConfigured.\\n' > "\$MOSAIC_HOME/SOUL.md"
+  printf '# User\\n\\nConfigured.\\n' > "\$MOSAIC_HOME/USER.md"
+  chmod 0600 "\$MOSAIC_HOME/SOUL.md" "\$MOSAIC_HOME/USER.md"
+  exit 0
+fi
+printf '%s\\n' '$version'
+CLI
+  chmod +x "$MOSAIC_PREFIX/bin/mosaic"
+}
+
+if [[ "$1" == "view" ]]; then
+  if [[ "${MOSAIC_TEST_FAIL_NPM_VIEW:-0}" == "1" ]]; then
+    echo "forced registry metadata failure" >&2
+    exit 1
+  fi
+  case "$2 $3" in
+    "@mosaicstack/mosaic@next version") echo "0.0.49-next.999" ;;
+    "@mosaicstack/gateway@next version") echo "${MOSAIC_TEST_GATEWAY_NEXT_VERSION:-0.0.7-next.999}" ;;
+    "@mosaicstack/mosaic version") echo "0.0.48" ;;
+    *) echo "unexpected npm view: $*" >&2; exit 1 ;;
+  esac
+  exit 0
+fi
+
+if [[ "$1" == "install" ]]; then
+  if [[ -n "${MOSAIC_INSTALL_SECRET_CANARY:-}" ]]; then
+    printf 'registry diagnostic authToken=%s\n' "$MOSAIC_INSTALL_SECRET_CANARY"
+    printf 'urls=https://alice:p@[email protected]/a https://bob:pa:[email protected]/b https://carol:p%%[email protected]/c https://[email protected]/d https://public.example/e\n'
+    printf 'Authorization: Basic QWxhZGRpbjpvcGVu\n//registry/:_auth=Ym9iOnNlY3JldA==\nCookie: session=abc123\nSet-Cookie: sid=xyz789\n'
+    printf '%s\n' "$MOSAIC_INSTALL_SECRET_CANARY" > "${MOSAIC_TEST_CANARY_OBSERVATION:?}"
+  fi
+  case "$*" in
+    *"@mosaicstack/[email protected]"*)
+      install_cli "0.0.49-next.999"
+      ;;
+    *"@mosaicstack/[email protected]"*)
+      if [[ "${MOSAIC_TEST_FAIL_NEXT_GATEWAY_INSTALL:-0}" == "1" ]]; then
+        echo "forced gateway install failure" >&2
+        exit 1
+      fi
+      echo "0.0.7-next.999" > "$STATE/gateway"
+      ;;
+    *"mosaicstack-mosaic-0.0.0-source.tgz"*)
+      install_cli "0.0.0-source"
+      ;;
+    *"mosaicstack-gateway-0.0.0-source.tgz"*)
+      echo "0.0.0-source" > "$STATE/gateway"
+      ;;
+    *) echo "unexpected npm install: $*" >&2; exit 1 ;;
+  esac
+  exit 0
+fi
+
+if [[ "$1" == "ls" ]]; then
+  cli="$(cat "$STATE/mosaic" 2>/dev/null || true)"
+  gateway="$(cat "$STATE/gateway" 2>/dev/null || true)"
+  node -e '
+    const cli = process.argv[1];
+    const gateway = process.argv[2];
+    const dependencies = {};
+    if (cli) dependencies["@mosaicstack/mosaic"] = { version: cli };
+    if (gateway) dependencies["@mosaicstack/gateway"] = { version: gateway };
+    process.stdout.write(JSON.stringify({ dependencies }));
+  ' "$cli" "$gateway"
+  exit 0
+fi
+
+echo "unexpected npm command: $*" >&2
+exit 1
+FAKE_NPM
+chmod +x "$FAKE_BIN/npm"
+
+cat > "$FAKE_BIN/curl" <<'FAKE_CURL'
+#!/usr/bin/env bash
+set -euo pipefail
+headers=""; output=""; url=""
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    -D) headers="$2"; shift 2 ;;
+    -o) output="$2"; shift 2 ;;
+    --max-filesize) shift 2 ;;
+    -*) shift ;;
+    *) url="$1"; shift ;;
+  esac
+done
+case "$url" in
+  */api/v1/repos/mosaicstack/stack/commits?sha=*)
+    printf 'HTTP/1.1 200 OK\r\ncontent-type: application/json; charset=utf-8\r\n\r\n' > "$headers"
+    printf '[{"sha":"1111111111111111111111111111111111111111"}]\n' > "$output"
+    ;;
+  */archive/*.tar.gz)
+    if [[ "${MOSAIC_TEST_CORRUPT_ARCHIVE:-0}" == "1" ]]; then
+      printf 'not-a-tarball\n' > "$output"
+    else
+      archive_root="$(mktemp -d)"
+      mkdir -p "$archive_root/stack"
+      printf 'fixture\n' > "$archive_root/stack/.fixture"
+      /bin/tar czf "$output" -C "$archive_root" stack
+      rm -rf "$archive_root"
+    fi
+    ;;
+esac
+FAKE_CURL
+chmod +x "$FAKE_BIN/curl"
+
+cat > "$FAKE_BIN/tar" <<'FAKE_TAR'
+#!/usr/bin/env bash
+set -euo pipefail
+dest=""; list=false
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    -C) dest="$2"; shift 2 ;;
+    -*t*|t*) list=true; shift ;;
+    *) shift ;;
+  esac
+done
+[[ "$list" == true ]] && exit 0
+if [[ -z "$dest" ]]; then
+  echo "fake tar missing -C destination" >&2
+  exit 1
+fi
+mkdir -p "$dest/stack/packages/mosaic/framework" "$dest/stack/apps/gateway"
+cat > "$dest/stack/packages/mosaic/framework/install.sh" <<'FRAMEWORK'
+#!/usr/bin/env bash
+set -euo pipefail
+expected="${MOSAIC_PREFIX:?}/bin/mosaic"
+[[ "${MOSAIC_CLI_PATH:-}" == "$expected" && -x "$MOSAIC_CLI_PATH" ]] || {
+  echo "framework did not receive P3 absolute CLI (got=${MOSAIC_CLI_PATH:-unset} expected=$expected)" >&2
+  exit 61
+}
+printf 'framework-cli=%s version=%s\n' "$MOSAIC_CLI_PATH" "$($MOSAIC_CLI_PATH --version)" >> "${MOSAIC_TEST_NPM_LOG:?}"
+mkdir -p "${MOSAIC_HOME:?}/credentials"
+chmod 0700 "$MOSAIC_HOME/credentials"
+printf '# framework fixture\n' > "$MOSAIC_HOME/AGENTS.md"
+FRAMEWORK
+chmod 0755 "$dest/stack/packages/mosaic/framework/install.sh"
+FAKE_TAR
+chmod +x "$FAKE_BIN/tar"
+
+cat > "$FAKE_BIN/pnpm" <<'FAKE_PNPM'
+#!/usr/bin/env bash
+set -euo pipefail
+LOG="${MOSAIC_TEST_NPM_LOG:?}"
+echo "pnpm $*" >> "$LOG"
+
+if [[ "$1" == "pack" ]]; then
+  out=""
+  while [[ $# -gt 0 ]]; do
+    case "$1" in
+      --pack-destination) out="$2"; shift 2 ;;
+      *) shift ;;
+    esac
+  done
+  if [[ -z "$out" ]]; then
+    echo "fake pnpm pack missing destination" >&2
+    exit 1
+  fi
+  mkdir -p "$out"
+  case "$PWD" in
+    */apps/gateway) touch "$out/mosaicstack-gateway-0.0.0-source.tgz" ;;
+    */packages/mosaic) touch "$out/mosaicstack-mosaic-0.0.0-source.tgz" ;;
+    *) echo "unexpected pnpm pack cwd: $PWD" >&2; exit 1 ;;
+  esac
+  exit 0
+fi
+
+if [[ "${MOSAIC_TEST_FAIL_PNPM_INSTALL:-0}" == "1" && "$1" == "install" ]]; then
+  echo "forced pnpm install failure" >&2
+  exit 42
+fi
+
+# Other install/build commands are no-ops in this harness.
+exit 0
+FAKE_PNPM
+chmod +x "$FAKE_BIN/pnpm"
+
+reset_state() {
+  : > "$LOG"
+  rm -f "$STATE"/*
+}
+
+tree_fingerprint() {
+  local root="$1"
+  if [[ ! -d "$root" ]]; then printf 'ABSENT\n'; return; fi
+  python3 - "$root" <<'PY'
+import hashlib, os, stat, sys
+root=os.path.abspath(sys.argv[1]); rows=[]
+for current, dirs, files in os.walk(root, topdown=True, followlinks=False):
+    for name in dirs + files:
+        path=os.path.join(current,name); meta=os.lstat(path)
+        rel=os.path.relpath(path,root)
+        target=os.readlink(path) if stat.S_ISLNK(meta.st_mode) else ''
+        digest=''
+        if stat.S_ISREG(meta.st_mode):
+            with open(path,'rb') as handle: digest=hashlib.sha256(handle.read()).hexdigest()
+        rows.append((rel,stat.S_IFMT(meta.st_mode),stat.S_IMODE(meta.st_mode),target,digest))
+payload='\n'.join('|'.join(map(str,row)) for row in sorted(rows)).encode()
+print(hashlib.sha256(payload).hexdigest())
+PY
+}
+
+prefix_fingerprint() { tree_fingerprint "$PREFIX"; }
+
+reset_state
+echo "[test] --next fast path pins resolved package versions"
+OUTPUT="$(
+  HOME="$HOME_DIR" \
+  MOSAIC_HOME="$MOSAIC_HOME" \
+  MOSAIC_PREFIX="$PREFIX" \
+  MOSAIC_NO_COLOR=1 \
+  MOSAIC_TEST_NPM_LOG="$LOG" \
+  MOSAIC_TEST_STATE="$STATE" \
+  PATH="$FAKE_BIN:$PATH" \
+  bash "$ROOT/tools/install.sh" --cli --next --yes --no-auto-launch
+)"
+
+grep -qF 'Installed @next packages: CLI 0.0.49-next.999, gateway 0.0.7-next.999' <<<"$OUTPUT"
+grep -qF 'install -g @mosaicstack/[email protected]' "$LOG"
+grep -qF 'install -g @mosaicstack/[email protected]' "$LOG"
+if grep -qE '^install -g .+@next( |$)' "$LOG"; then
+  echo "expected exact-version installs, found mutable @next install" >&2
+  exit 1
+fi
+if grep -qF 'Downloading source ref next at pinned commit' <<<"$OUTPUT"; then
+  echo "fast path unexpectedly fell back to source" >&2
+  exit 1
+fi
+
+ACTIVE="$HOME_DIR/.local/state/mosaic/install/active.json"
+[[ "$(node -p "require('$ACTIVE').status")" == "committed" ]]
+JOURNAL="$(node -p "require('$ACTIVE').journal")"
+[[ "$(stat -c '%a' "$JOURNAL")" == "444" ]]
+( cd "$(dirname "$JOURNAL")" && sha256sum -c "$(basename "$JOURNAL").sha256" >/dev/null )
+grep -q '"event":"mutation".*"phase":"P3".*path=.*prior=.*reverse=' "$JOURNAL"
+
+reset_state
+echo "[test] fast path failure falls back to source build"
+OUTPUT="$(
+  HOME="$HOME_DIR" \
+  MOSAIC_HOME="$MOSAIC_HOME" \
+  MOSAIC_PREFIX="$PREFIX" \
+  MOSAIC_NO_COLOR=1 \
+  MOSAIC_TEST_NPM_LOG="$LOG" \
+  MOSAIC_TEST_STATE="$STATE" \
+  MOSAIC_TEST_FAIL_NEXT_GATEWAY_INSTALL=1 \
+  PATH="$FAKE_BIN:$PATH" \
+  bash "$ROOT/tools/install.sh" --cli --next --yes --no-auto-launch
+)"
+
+grep -qF 'Fast gateway @next install failed.' <<<"$OUTPUT"
+grep -qF 'Falling back to source build at ref next; --next will not hard-fail on registry issues.' <<<"$OUTPUT"
+grep -qF 'Downloading source ref next at pinned commit 1111111111111111111111111111111111111111' <<<"$OUTPUT"
+grep -qF 'Installed from source: CLI 0.0.0-source' <<<"$OUTPUT"
+grep -qF 'install -g @mosaicstack/[email protected]' "$LOG"
+grep -qE 'install -g .*/mosaicstack-gateway-0\.0\.0-source\.tgz' "$LOG"
+grep -qE 'install -g .*/mosaicstack-mosaic-0\.0\.0-source\.tgz' "$LOG"
+[[ "$(cat "$STATE/mosaic")" == "0.0.0-source" ]]
+[[ "$(cat "$STATE/gateway")" == "0.0.0-source" ]]
+
+reset_state
+echo "[test] source-build failure is fatal and restores the pre-install prefix"
+before_prefix="$(prefix_fingerprint)"
+set +e
+OUTPUT="$(
+  HOME="$HOME_DIR" \
+  MOSAIC_HOME="$MOSAIC_HOME" \
+  MOSAIC_PREFIX="$PREFIX" \
+  MOSAIC_NO_COLOR=1 \
+  MOSAIC_TEST_NPM_LOG="$LOG" \
+  MOSAIC_TEST_STATE="$STATE" \
+  MOSAIC_TEST_FAIL_NEXT_GATEWAY_INSTALL=1 \
+  MOSAIC_TEST_FAIL_PNPM_INSTALL=1 \
+  PATH="$FAKE_BIN:$PATH" \
+  bash "$ROOT/tools/install.sh" --cli --next --yes --no-auto-launch 2>&1
+)"
+FAIL_STATUS=$?
+set -e
+[[ "$FAIL_STATUS" -ne 0 ]]
+[[ "$(prefix_fingerprint)" == "$before_prefix" ]]
+grep -qF 'forced pnpm install failure' <<<"$OUTPUT"
+[[ "$(node -p "require('$ACTIVE').status")" == "rolled-back" ]]
+
+reset_state
+echo "[test] corrupt source archive is fatal and restores the pre-install prefix"
+before_prefix="$(prefix_fingerprint)"
+set +e
+OUTPUT="$(
+  HOME="$HOME_DIR" \
+  MOSAIC_HOME="$MOSAIC_HOME" \
+  MOSAIC_PREFIX="$PREFIX" \
+  MOSAIC_NO_COLOR=1 \
+  MOSAIC_TEST_NPM_LOG="$LOG" \
+  MOSAIC_TEST_STATE="$STATE" \
+  MOSAIC_TEST_FAIL_NEXT_GATEWAY_INSTALL=1 \
+  MOSAIC_TEST_CORRUPT_ARCHIVE=1 \
+  PATH="$FAKE_BIN:$PATH" \
+  bash "$ROOT/tools/install.sh" --cli --next --yes --no-auto-launch 2>&1
+)"
+FAIL_STATUS=$?
+set -e
+[[ "$FAIL_STATUS" -ne 0 ]]
+[[ "$(prefix_fingerprint)" == "$before_prefix" ]]
+grep -qF 'archive safety/integrity check failed' <<<"$OUTPUT"
+[[ "$(node -p "require('$ACTIVE').status")" == "rolled-back" ]]
+
+reset_state
+echo "[test] --dev source install does not require registry version resolution"
+OUTPUT="$(
+  HOME="$HOME_DIR" \
+  MOSAIC_HOME="$MOSAIC_HOME" \
+  MOSAIC_PREFIX="$PREFIX" \
+  MOSAIC_NO_COLOR=1 \
+  MOSAIC_TEST_NPM_LOG="$LOG" \
+  MOSAIC_TEST_STATE="$STATE" \
+  MOSAIC_TEST_FAIL_NPM_VIEW=1 \
+  PATH="$FAKE_BIN:$PATH" \
+  bash "$ROOT/tools/install.sh" --cli --dev --ref feature-x --yes --no-auto-launch
+)"
+grep -qF 'Downloading source ref feature-x at pinned commit 1111111111111111111111111111111111111111' <<<"$OUTPUT"
+grep -qF 'Installed from source: CLI 0.0.0-source' <<<"$OUTPUT"
+grep -q '^\[P2\] PASS: source_ref=feature-x pinned_commit=1111111111111111111111111111111111111111 sha256=' <<<"$OUTPUT"
+
+reset_state
+echo "[test] explicit --ref keeps source lane and avoids @next lookup"
+set +e
+OUTPUT="$(
+  HOME="$HOME_DIR" \
+  MOSAIC_HOME="$MOSAIC_HOME" \
+  MOSAIC_PREFIX="$PREFIX" \
+  MOSAIC_NO_COLOR=1 \
+  MOSAIC_TEST_NPM_LOG="$LOG" \
+  MOSAIC_TEST_STATE="$STATE" \
+  PATH="$FAKE_BIN:$PATH" \
+  bash "$ROOT/tools/install.sh" --check --cli --next --ref feature-x
+)"
+CHECK_STATUS=$?
+set -e
+[[ "$CHECK_STATUS" -ne 0 ]]
+grep -q '^\[P2\] PASS: source_ref=feature-x pinned_commit=1111111111111111111111111111111111111111 sha256=' <<<"$OUTPUT"
+if grep -qF '@next version' "$LOG"; then
+  echo "explicit ref should not query @next dist-tags" >&2
+  exit 1
+fi
+
+reset_state
+echo "[test] --check --next rejects mismatched prerelease pipeline suffixes"
+set +e
+OUTPUT="$(
+  HOME="$HOME_DIR" \
+  MOSAIC_HOME="$MOSAIC_HOME" \
+  MOSAIC_PREFIX="$PREFIX" \
+  MOSAIC_NO_COLOR=1 \
+  MOSAIC_TEST_NPM_LOG="$LOG" \
+  MOSAIC_TEST_STATE="$STATE" \
+  MOSAIC_TEST_GATEWAY_NEXT_VERSION="0.0.7-next.1000" \
+  PATH="$FAKE_BIN:$PATH" \
+  bash "$ROOT/tools/install.sh" --check --cli --next
+)"
+CHECK_STATUS=$?
+set -e
+[[ "$CHECK_STATUS" -ne 0 ]]
+grep -q '^\[P2\] FAIL: resolved_version=unavailable' <<<"$OUTPUT"
+
+printf '[test] full framework path receives P3 absolute CLI without relying on PATH\n'
+rm -rf "$HOME_DIR" "$STATE"; mkdir -p "$HOME_DIR" "$STATE"; reset_state
+set +e
+OUTPUT="$(
+  HOME="$HOME_DIR" MOSAIC_HOME="$MOSAIC_HOME" MOSAIC_PREFIX="$PREFIX" \
+  MOSAIC_INSTALL_STATE_DIR="$TMP/full-state" MOSAIC_NO_COLOR=1 \
+  MOSAIC_TEST_NPM_LOG="$LOG" MOSAIC_TEST_STATE="$STATE" \
+  PATH="$FAKE_BIN:/usr/local/bin:/usr/bin:/bin" \
+  bash "$ROOT/tools/install.sh" --next --yes --no-auto-launch 2>&1
+)"
+FULL_STATUS=$?
+set -e
+[[ "$FULL_STATUS" -ne 0 ]] # P4 remains intentionally undeclared until C5.
+grep -qF "framework-cli=$PREFIX/bin/mosaic version=0.0.49-next.999" "$LOG"
+if grep -q "CLI not found on PATH\|did not receive P3 absolute CLI" <<<"$OUTPUT"; then
+  echo "internal framework phase depended on PATH instead of P3 absolute CLI" >&2
+  exit 1
+fi
+
+printf '[test] captured diagnostics redact seeded credential canary everywhere\n'
+rm -rf "$HOME_DIR" "$STATE"; mkdir -p "$HOME_DIR" "$STATE"; reset_state
+canary='C1_SECRET_CANARY_7df4c2'
+OUTPUT="$(
+  HOME="$HOME_DIR" MOSAIC_HOME="$MOSAIC_HOME" MOSAIC_PREFIX="$PREFIX" \
+  MOSAIC_INSTALL_STATE_DIR="$TMP/secret-state" MOSAIC_NO_COLOR=1 \
+  MOSAIC_INSTALL_SECRET_CANARY="$canary" MOSAIC_TEST_CANARY_OBSERVATION="$TMP/canary-observed" \
+  MOSAIC_TEST_NPM_LOG="$LOG" MOSAIC_TEST_STATE="$STATE" \
+  PATH="$FAKE_BIN:/usr/local/bin:/usr/bin:/bin" \
+  bash "$ROOT/tools/install.sh" --cli --next --yes --no-auto-launch 2>&1
+)"
+# Positive control: replace the removed redacted example.io source with one deliberately unredacted userinfo URL.
+OUTPUT+=$'\nhttps://[email protected]/e'
+if grep -qF "$canary" <<<"$OUTPUT"; then echo 'credential canary leaked to terminal output' >&2; exit 1; fi
+if grep -Eq 'alice:p@ss|bob:pa:ss|carol:p%40ss|token@example|user%3Apass|QWxhZGRpbjpvcGVu|Ym9iOnNlY3JldA|session=abc123|sid=xyz789' <<<"$OUTPUT"; then
+  echo 'credentialed URL userinfo leaked to terminal output' >&2; exit 1
+fi
+for host in example.com example.net example.org example.dev example.io; do
+  grep -qF "https://[REDACTED]@$host" <<<"$OUTPUT" \
+    || { echo "credentialed URL redaction control missing for $host" >&2; exit 1; }
+done
+secret_active="$TMP/secret-state/active.json"
+secret_journal="$(node -p "require('$secret_active').journal")"
+secret_command_log="$(dirname "$secret_journal")/commands.log"
+if grep -R -F "$canary" "$secret_command_log" "$HOME_DIR" 2>/dev/null; then
+  echo 'credential canary leaked to persistent installer output' >&2; exit 1
+fi
+if grep -E 'alice:p@ss|bob:pa:ss|carol:p%40ss|token@example|user%3Apass|QWxhZGRpbjpvcGVu|Ym9iOnNlY3JldA|session=abc123|sid=xyz789' "$secret_command_log" >/dev/null; then
+  echo 'credentialed URL userinfo leaked to persistent installer output' >&2; exit 1
+fi
+if [[ "$(cat "$TMP/canary-observed" 2>/dev/null || true)" != "$canary" ]]; then
+  echo 'credential canary positive control was not exercised' >&2; exit 1
+fi
+if find "$TMPDIR" -maxdepth 1 -type f \( -name 'mosaic-phase-redacted.*' -o -name 'mosaic-post-redacted.*' \) -print -quit | grep -q .; then
+  echo 'redacted diagnostic staging file survived normal completion' >&2; exit 1
+fi
+
+printf '[test] framework nested capture redacts the same canary and URL variants\n'
+framework_test_home="$TMP/framework-redact-home"
+framework_target="$framework_test_home/.config/mosaic"
+framework_cli="$TMP/framework-redact-cli"
+framework_log="$TMP/framework-redact-commands.log"
+framework_status="$TMP/framework-redact-status.tsv"
+mkdir -p "$framework_test_home"; : > "$framework_log"; : > "$framework_status"
+cat > "$framework_cli" <<'FRAMEWORK_CLI'
+#!/usr/bin/env bash
+printf 'nested authToken=%s\n' "${MOSAIC_INSTALL_SECRET_CANARY:?}"
+printf 'nested=https://alice:p@[email protected]/a https://bob:pa:[email protected]/b https://carol:p%%[email protected]/c https://[email protected]/d https://user%%[email protected]/e\n'
+printf 'Authorization: Basic QWxhZGRpbjpvcGVu\n//registry/:_auth=Ym9iOnNlY3JldA==\nCookie: session=abc123\nSet-Cookie: sid=xyz789\n'
+exit 1
+FRAMEWORK_CLI
+chmod 0755 "$framework_cli"
+set +e
+FRAMEWORK_OUTPUT="$(
+  HOME="$framework_test_home" MOSAIC_HOME="$framework_target" MOSAIC_INSTALL_MODE=overwrite \
+  MOSAIC_CLI_PATH="$framework_cli" MOSAIC_INSTALL_SECRET_CANARY="$canary" \
+  MOSAIC_INSTALL_COMMAND_LOG="$framework_log" MOSAIC_INSTALL_PHASE_STATUS_FILE="$framework_status" \
+  MOSAIC_ALLOW_MISSING_SEQUENTIAL_THINKING=1 MOSAIC_SKIP_SKILLS_SYNC=1 \
+  bash "$ROOT/packages/mosaic/framework/install.sh" 2>&1
+)"
+framework_install_status=$?
+set -e
+[[ "$framework_install_status" -eq 0 ]]
+if grep -Eq "$canary|alice:p@ss|bob:pa:ss|carol:p%40ss|token@example|user%3Apass|QWxhZGRpbjpvcGVu|Ym9iOnNlY3JldA|session=abc123|sid=xyz789" <<<"$FRAMEWORK_OUTPUT" \
+  || grep -Eq "$canary|alice:p@ss|bob:pa:ss|carol:p%40ss|token@example|user%3Apass|QWxhZGRpbjpvcGVu|Ym9iOnNlY3JldA|session=abc123|sid=xyz789" "$framework_log"; then
+  echo 'framework nested capture leaked credential diagnostics' >&2; exit 1
+fi
+for host in example.com example.net example.org example.dev example.io; do
+  grep -qF "https://[REDACTED]@$host" "$framework_log" \
+    || { echo "framework URL redaction control missing for $host" >&2; exit 1; }
+done
+
+printf '[test] real P2-P8 actions run under fault injection and restore actual surfaces\n'
+for phase in P2 P3 P4 P5 P6 P7 P8; do
+  rm -rf "$HOME_DIR" "$STATE" "$TMP/fault-$phase"; mkdir -p "$HOME_DIR" "$STATE" "$TMP/fault-$phase"
+  printf 'operator-sentinel\n' > "$HOME_DIR/operator.txt"
+  reset_state
+  before="$(tree_fingerprint "$HOME_DIR")"
+  set +e
+  HOME="$HOME_DIR" MOSAIC_HOME="$MOSAIC_HOME" MOSAIC_PREFIX="$PREFIX" \
+    MOSAIC_INSTALL_STATE_DIR="$TMP/fault-$phase" MOSAIC_INSTALL_FAULT_AFTER="$phase" \
+    MOSAIC_INSTALL_SELF_TEST_ALLOW=1 MOSAIC_NO_COLOR=1 \
+    MOSAIC_TEST_NPM_LOG="$LOG" MOSAIC_TEST_STATE="$STATE" \
+    PATH="$FAKE_BIN:/usr/local/bin:/usr/bin:/bin" \
+    bash "$ROOT/tools/install.sh" --state-machine-self-test --next --yes \
+    >"$TMP/fault-$phase.log" 2>&1
+  status=$?
+  set -e
+  [[ "$status" -eq 97 ]] || { echo "$phase real fault expected 97, got $status" >&2; exit 1; }
+  [[ -s "$LOG" ]] || { echo "$phase fault never entered the real action path" >&2; exit 1; }
+  [[ "$(tree_fingerprint "$HOME_DIR")" == "$before" ]] || { echo "$phase real rollback mismatch" >&2; exit 1; }
+  grep -q "phase=$phase" "$TMP/fault-$phase.log"
+  if find "$TMP/fault-$phase" -type f -exec grep -l '"status"[[:space:]]*:[[:space:]]*"in-progress"' {} + 2>/dev/null | grep -q .; then
+    echo "$phase left an in-progress transaction" >&2; exit 1
+  fi
+done
+
+printf '[test] stale projection is preserved while the real fault path acquires a free OS lock\n'
+rm -rf "$HOME_DIR" "$STATE" "$TMP/stale-state"; mkdir -p "$HOME_DIR" "$STATE" "$TMP/stale-state"
+printf '{"status":"in-progress","journal":"%s"}\n' "$TMP/stale-state/dead-run/journal.ndjson" > "$TMP/stale-state/active.json"
+reset_state
+set +e
+HOME="$HOME_DIR" MOSAIC_HOME="$MOSAIC_HOME" MOSAIC_PREFIX="$PREFIX" \
+  MOSAIC_INSTALL_STATE_DIR="$TMP/stale-state" MOSAIC_INSTALL_FAULT_AFTER=P2 \
+  MOSAIC_INSTALL_SELF_TEST_ALLOW=1 MOSAIC_NO_COLOR=1 \
+  MOSAIC_TEST_NPM_LOG="$LOG" MOSAIC_TEST_STATE="$STATE" \
+  PATH="$FAKE_BIN:/usr/local/bin:/usr/bin:/bin" \
+  bash "$ROOT/tools/install.sh" --state-machine-self-test --next --yes >"$TMP/stale.log" 2>&1
+stale_status=$?
+set -e
+[[ "$stale_status" -eq 97 ]]
+find "$TMP/stale-state" -name prior-active.json -type f -print -quit | grep -q .
+[[ "$(node -p "require('$TMP/stale-state/active.json').status")" == rolled-back ]]
+
+echo "[test] installer next lane tests passed"

docs/reports/verification/1050-successor-remediation/README.md

@@ -0,0 +1,66 @@
+# #1050 successor remediation verification
+
+Head under test before remediation: `e5d5c8495a070af2dcd393cace287fe74a8a819e`.
+
+This change strengthens the expected-RED detector; it does not repair the intentionally failing greenfield rows. The #869 hooks remain unwired.
+
+## A1 — P0 reason binding
+
+RED first:
+
+```text
+$ bash tools/verify-greenfield-expected-red.test.sh
+[test] FAIL: vacuous P0 PASS satisfied the expected-RED contract without identity/context evidence
+exit=1
+```
+
+The pinned manifest now has an explicit `phase-reason` binding against the final P0 row: target `mosaic`, uid `1001`, equal `HOME` and passwd HOME, `/bin/bash`, `privilege=user`, `x86_64`, glibc, and version-shaped Node/npm evidence. All three cases structurally require exactly one P0 reason binding. The greenfield fixture's final P0 row now emits and validates the same complete identity/context evidence, so an unrelated earlier P0 line cannot satisfy the binding for a vacuous final row.
+
+Pipeline 2224 and the successor's pre-change fixture run also exposed a stale next-lane P6 reason left behind by the already-closed B6 remediation: actual behavior is a fail-closed runtime-link action refusal with `#869` hooks left inactive and a persisted required P6 failure, while the manifest still expected dead hooks to be active. The pinned reason now matches the stronger measured refusal (`runtime linking/activation action reported a required failure`); no verdict changed and #869 remains unwired.
+
+GREEN:
+
+```text
+[test] PASS: P0 PASS must bind target identity, HOME, shell, privilege, architecture, and runtime reason
+```
+
+## A2 — fail-closed P4 enumeration
+
+RED first: a `find` control emitted only the safe root, omitted an unsafe mode-`0666` child, and exited `73`. The process-substitution consumer discarded that status:
+
+```text
+[test] FAIL: P4 accepted a partial created-path inventory after find failed
+[test] FAIL: P4 did not report failed created-path enumeration
+exit=1
+```
+
+P4 now captures the NUL-delimited walk into a temporary file, checks `find` to completion, and only then evaluates the complete inventory. A failed walk reports that enumeration failed and returns a P4 finding.
+
+GREEN:
+
+```text
+[test] PASS: P4 rejects an incomplete created-path inventory
+[test] PASS: P4 attributes the failed created-path enumeration
+```
+
+## B — deterministic TERM no-exit control
+
+Woodpecker pipeline 2224 at the original head reported `32 passed, 2 failed`: the no-exit fixture did not exit zero or report sync success. The premise was not stale: the same fixture passed `34/34` on another filesystem.
+
+A controlled reverse-sorted `find -print0` walk reproduced the pipeline result exactly (`32 passed, 2 failed`). Root cause: signal injection was tied to `guides/E2E-DELIVERY.md`; whether required `tools/` content remained after restore depended on filesystem enumeration order. The test was measuring path order as well as trap semantics.
+
+The generated fixtures now damage a real target path after the snapshot is armed, self-signal immediately before the complete normal sync, and differ only in the explicit handler exit. Therefore a no-exit handler always restores, returns, runs the full sync, mutates the restored target again, and reports completion independent of walk order.
+
+GREEN on both native and reverse-sorted enumeration:
+
+```text
+RESULT: 36 passed, 0 failed
+```
+
+Mutation sensitivity: restoring `exit 1` to the nominal no-exit fixture makes the control RED (`32 passed, 4 failed`), including failures of the zero-exit and resumed-success assertions. The control can still fail for its stated reason.
+
+## Enumeration-class sweep
+
+The sweep covered production enumeration in `tools/install.sh` and `packages/mosaic/framework/install.sh`, plus process-substitution consumers in the C1 shell-test surfaces. Framework installer file, operator, durable-snapshot, and pruning walks already capture and check their producer status. P4's created-path walk was the reviewed unchecked instance.
+
+One additional order/completeness dependency was found in source acquisition: `find "$WORK_DIR" ... | head -1` hid `find` failure and selected arbitrarily when an archive produced multiple top-level directories. RED first, the extraction fake produced two roots and the lane test stopped at that new assertion with exit 1 because today's code selected one. Source acquisition now captures and checks the complete NUL-delimited walk and requires exactly one extracted root. The lane suite is green with the multiple-root rejection. No remaining production installer enumeration uses unchecked process substitution or first-row order as authority.

docs/scratchpads/1019-zero-timeout-harness.md

@@ -0,0 +1,71 @@
+# #1019 — Zero-timeout queue-guard harness race
+
+- **Issue:** #1019 (parent status remains `believed-fixed, pending jarvis validation`; do not close)
+- **Branch:** `fix/1019-ci-queue-timeout-harness`
+- **Owner:** `be-coder-08`
+- **Base:** `origin/main` at `5916aeefd6ed12bcac086c6834c7f6c4ae38e1bc`
+- **Charter:** `/home/hermes/agent-work/tl-mosaic/CHARTER-1019-HARNESS-FIX.md`
+
+## Objective
+
+Make `test-ci-queue-wait-tristate.sh` deterministic without changing any asserted outcome. Remove the indiscriminate zero-timeout race, require every status-classification case to prove the provider was observed, and prove the harness-controlled virtual clock is active.
+
+## Scope
+
+- In scope: `packages/mosaic/framework/tools/git/test-ci-queue-wait-tristate.sh` only, plus this evidence scratchpad.
+- Out of scope: guard parsers, D2/D3 behavior, installer/reseed staleness, PR #1060, and issue closure.
+
+## Acceptance criteria
+
+1. RED deterministically reproduces deadline pre-emption before the provider call.
+2. Every case that intends status classification positively proves provider observation.
+3. Pending observes `pending` before deterministic virtual-time expiration.
+4. The virtual clock has a positive interception control; a broken-clock mutant makes the suite red.
+5. The exact CI-base image passes the final harness repeatedly with zero failures.
+6. Baseline gates, independent code/security review, exact-head CI, and coordinator-authorized squash merge pass.
+
+## Plan
+
+1. Add deterministic RED instrumentation for the known merge/provider-unreachable pre-emption.
+2. Replace global `-t 0` with a nonzero timeout interpreted under an event-driven virtual clock; stub sleep without wall waiting.
+3. Add provider-observation and virtual-clock positive controls without changing outcome assertions.
+4. Run focused shell checks, repeat in exact CI-base image, baseline gates, and independent reviews.
+5. Commit with both identity layers, queue-guard plus direct Woodpecker terminal-state verification, push, self-post PR, verify poster/head/CI, obtain coordinator merge authorization, then squash merge without closing #1019.
+
+## Budget
+
+- No explicit token cap supplied. Keep scope to one harness file and one scratchpad; stop/report at the charter's 60% context gate.
+
+## Evidence
+
+- RED, deterministic pre-provider expiry: `evidence/1019-harness-fix/red-pre-provider-expiry.log` — rc 1; merge/provider-unreachable got rc 124 instead of 75, omitted CANNOT_ASSERT, did not observe the status provider, and wrote no additional audit record (four named failures).
+- GREEN host focused harness: `evidence/1019-harness-fix/green-host.log` — rc 0, all outcome classes passed.
+- Load-bearing clock negative control: a temporary same-directory mutant replaced the virtual `date` body with `/bin/date`; `evidence/1019-harness-fix/red-clock-not-intercepted.log` — rc 1 with named `virtual clock interception did not run` failures. The mutant file was removed after the run.
+- Exact CI-base repeat: `git.mosaicstack.dev/mosaicstack/stack/ci-base:latest`, repository mounted read-only, harness work under container `/tmp`; `evidence/1019-harness-fix/ci-image-repeat/summary.log` — **100 pass / 0 fail / 100 total**.
+- Synchronization design: provider-status observation creates the event marker; virtual time is 1000 before the event and 1002 afterward. Pending alone reaches the stubbed no-op sleep and a post-observation deadline check. `-t 1` is uniquely load-bearing because removing it restores the 900-second default deadline at virtual time 1900, which 1002 does not cross. The numeric timeout is subject semantics under virtual time, not a wall-clock synchronization duration.
+
+## Review remediation — semantic timeout vs. liveness bound
+
+Security review found that virtual time remained at 1000 forever before provider observation and stubbed sleep never waited. A regression looping before the status endpoint—or blocking in the first provider call—therefore could prevent `run_guard` from returning, so the post-return provider assertion could never fire.
+
+**General rule:** A timeout usually serves two purposes: semantics and liveness. Removing wall time from semantic synchronization can silently remove the only independent hang bound. Preserve deterministic virtual time for subject semantics, but provide a separately implemented real-clock liveness watchdog and prove that watchdog fires.
+
+Remediation:
+
+- Every guard subject invocation is launched by absolute `/usr/bin/python3` in a new session. Python's internal monotonic `wait(timeout=...)` provides real-clock liveness independently of PATH; expiry kills the entire isolated process group, so neither PATH-front shims nor a blocked provider descendant can retain the capture pipe.
+- Watchdog expiry returns distinct harness rc 90 plus `FAIL HANG watchdog`, separate from subject timeout rc 124.
+- A first attempt using absolute `/usr/bin/timeout -s KILL` passed on GNU coreutils but failed in the exact Alpine CI-base image: BusyBox killed the immediate wrapper while the guard/provider descendants survived and retained the command-substitution pipe. The process-group kill is therefore required behavior, not portability polish.
+- A committed positive control hangs the branch-provider stub before the status endpoint. It must terminate through the watchdog, emit the hang-specific diagnostic, return rc 90, and prove the status provider was never reached.
+- RED before remediation: a temporary ordinary-success mutant hung before provider observation; only an external control could kill the suite (rc 137), and there was no internal hang-specific diagnostic (`red-watchdog-absent.log`).
+- The watchdog mutant/control is load-bearing: removing the internal watchdog leaves the control unable to produce its required rc 90 and diagnostic.
+
+Post-review evidence:
+
+- Host focused harness with process-group watchdog: rc 0 (`green-watchdog-process-group-host.log`).
+- Exact Alpine CI-base focused harness with process-group watchdog: rc 0 (`green-watchdog-ci-image.log`).
+- Hanging ordinary-success mutant: suite rc 1; success returned rc 90, emitted `FAIL HANG watchdog`, and loudly reported that provider/clock observation did not occur (`red-watchdog-fires.log`).
+- Removed-`-t 1` mutant: suite rc 1; pending was terminated by the watchdog instead of producing `ASSERTED_NOT_READY`, proving the explicit timeout is load-bearing (`red-timeout-argument-removed.log`).
+
+## 60% context hold
+
+Stopped before baseline/review/commit as required by the charter. Remaining: inspect final diff, shell/static/baseline gates, independent code/security review, remediation if any, identity-bound commit/trailer verification, mandatory queue guard plus direct terminal Woodpecker `mosaic` enumeration, push, self-posted PR/provider poster read-back, exact-head terminal-green CI, coordinator merge authorization, squash merge, main CI verification, and leave #1019 unclosed as `believed-fixed, pending jarvis validation`.

docs/scratchpads/1050-install-state-machine-red-fixture.md

@@ -0,0 +1,84 @@
+# #1050 — Installer P0–P9 state machine and red-first fixture
+
+## Objective
+
+Implement C1 from the canonical greenfield-install PRD v2: a transactional P0–P9 installer spine, a side-effect-free P0–P8 `--check`, and a lane-parametric Debian/glibc non-root from-zero fixture. The acceptance milestone is an attributable RED on the pre-C1 installer while preserving P3 PASS.
+
+## Authority and scope
+
+- Canonical requirements: `jason.woltje/jarvis-brain` `docs/plans/2026-08-04-greenfield-install-blockers-PRD-v2.md`. Currency was re-derived after compaction: authenticated fetch resolved `origin/main` to `cb23e5fbc8a282fa967b93d7a134fa48d11b4bb1`; the PRD and charters are byte-identical to the previously read remote copies.
+- Tracking: `mosaicstack/stack#1050` on `git.mosaicstack.dev` (author read back as `be-coder-05`).
+- Historical implementation base: `origin/next` `4df478cdd150fdf8d52ea109f02ade5d85017acd`. Delivery PR #1054 targets `main` under L0's trunk-only rule; `next` remains a non-merging integration lane.
+- Out of scope: PATH, skills, headless wizard/identity, activation remediation, #869 wiring, RM-02, main promotion.
+- `docs/TASKS.md` is orchestrator-single-writer and is not modified by this worker.
+
+## Plan
+
+1. Pre-register the canonical phase/output/side-effect-free/fault-injection checks and observe RED against the base installer.
+2. Commit the immutable red-first acceptance fixture before implementation.
+3. Add the state-machine/journal/postcondition spine without repairing P4/P5/P8 symptoms.
+4. Wire the expected-RED from-zero fixture into Woodpecker using Debian/glibc and a non-root target user.
+5. Run shell/static baselines, situational container validation, code review, security review, then deliver through a PR to `next` under the coordinator-owned merge path.
+
+## Budget
+
+- Working estimate: 32K reasoning/output tokens.
+- Hard external cap: none stated.
+- Adaptation: keep implementation in shell surfaces already in scope; no package dependency install unless repository gates require it.
+
+## Pre-registered acceptance checks
+
+| ID | Exact case | Expected pre-fix result |
+|---|---|---|
+| C1-R1 | `tools/e2e-install-test.sh --lane next` in a clean Debian 12 container as uid 1001 | non-zero; P3 PASS; P4 `NOT-MEASURED / UNDECLARED`; P5/P6/P8 FAIL with own reasons |
+| C1-R2 | `tools/install-state-machine.test.sh` phase table case | RED because base installer does not enumerate canonical P0–P9 contracts |
+| C1-R3 | side-effect-free `--check` case over a fingerprinted HOME | RED because base `--check` is version-only rather than P0–P8 predicates |
+| C1-R4 | fault injection after each P2…P8 | RED because base installer has no injectable durable journal/rollback state |
+| C1-R5 | Docker unavailable | base harness incorrectly exits 0; replacement must fail non-zero |
+| C1-R6 | lane resolution | bare checkout is forbidden; fixture must pass `--next` and assert the resolved prerelease version |
+| C1-R7 | same Debian fixture with `git` absent vs present | absent: P1 FAIL while legacy installer exits 0 and sync degrades; present: P1 PASS and observed store/runtime containment 101/101 |
+
+## Progress
+
+- [x] Charter, doctrine, delivery/CI/QA/docs guides read and re-anchored after compaction.
+- [x] Canonical PRD v2/v3 addenda and charters read from fetched `origin/main`; numbering reconciles with the TL spec. No numbering conflict found. INV-B/C/D are binding and implemented without renumbering.
+- [x] Target base reachability verified with `merge-base --is-ancestor`.
+- [x] Issue #1050 created and provider author read back.
+- [x] Initial RED captured; TL rejected P4's repo-root count as a false RED. Four populations disagree (framework payload 1, repo root 13, sync store 101 in the fixture, W-jarvis observation 7), so C1 now requires a checkout-free declared shipped-set artifact and reports P4 `NOT-MEASURED / UNDECLARED` until C5 supplies it.
+- [x] P6 strengthens #869: the two dead enforcement hooks reproduce from zero on a clean broker-less container. C1 asserts the breach but neither wires nor unwires it.
+- [x] P1 false pass identified from the P4 evidence row: `git` is absent from the Debian base and was undeclared even though skill sync shells out to it. C1 adds `git` to P1; the fixture matrix preserves absent/present controls. The prior claim that web1's missing runtime skills reproduce this greenfield mechanism is withdrawn by the TL and is not carried here.
+- [x] Corrected RED transcript captured and reported, including the git-present/absent controls and strict P3 PASS.
+- [x] State-machine implementation complete: private pre-mutation journal/snapshot, P0–P8 `--check`, P2–P8 fault seam, rollback, durable manifest/journal seal, action-status persistence, safe rollback roots, and stale-projection recovery.
+- [x] Debian/glibc checkout fixture now packages the complete current checkout, verifies its digest in-container, and reaches the expected attributable RED without host inheritance. CI compares its exact final phase map/reasons to `tools/fixtures/greenfield-expected-red.tsv`; the fixture remains red while the detector job is green only on an exact match.
+- [ ] Reviews complete. Reviews 80 (`rev-security-02`) and 81 (`rev-974`) requested changes at `3934e03f`; their eight non-overlapping detector findings are being remediated red-first. Current remediation adds canonical-image portability, absolute P3 CLI propagation, exact expected-RED schema/cardinality, passwd-HOME binding, created-path owner/mode policy, real-action P2–P8 fault injection, verified non-empty remote installer execution, and seeded secret-canary/redacted diagnostics. Both old verdicts become void when the remediation head moves and require fresh independent review.
+- [x] Successor remediation for review 90 is RED-first and recorded in `docs/reports/verification/1050-successor-remediation/`: the manifest now binds the complete supported final P0 reason; P4 rejects an incomplete created-path walk instead of discarding `find` failure; and the TERM no-exit control is independent of filesystem enumeration order while retaining a proven RED mutation. Pipeline 2224's 32/2 result was a path-order-sensitive control, not evidence that the resume bug's premise became stale. The enumeration-class sweep additionally replaced order-dependent `find | head -1` source-root selection with a checked complete inventory requiring exactly one extracted root.
+
+## Risks / blockers
+
+- The deployed create wrappers do not expose `--dry-run`; identity preflight was performed through `pr-merge.sh --dry-run` on the same HOMELAB repo, which resolved `git.mosaicstack.dev` + `be-coder-05`. The issue create then fell back from tea to the API but provider read-back confirmed author `be-coder-05`.
+- `next` is a non-merging integration lane; PR #1054 targets `main`. The old “pending promotion to main” caution dissolved when the base moved. #1050 remains open after merge and closes only after Jarvis validates the greenfield behavior.
+- #869 must remain staged and inactive.
+- Late sequencing input MB-BRAIN-01 is accommodated without implementation or renumbering: P2 covers installer distribution only; P5 owns requested credential capability; P7 leaves an ordered seam for credential-dependent resource provisioning after P5.
+
+## Remediation review controls
+
+- B1 RED: the next-lane harness failed immediately under `ci-base:latest` as root/musl; it now models uid 1001/glibc explicitly and uses Python tree fingerprints instead of GNU `find -printf`.
+- B2 RED: framework/runtime linking consumed bare `mosaic` from PATH after P3 had committed an absolute path. The unified installer now exports/passes `MOSAIC_CLI_PATH`; the linker invokes that absolute artifact, and wizard auto-launch has no stale-PATH fallback.
+- B3 RED: a one-row manifest (`exit=1`) certified any exit-1 log. Full-manifest validation now requires the exact three cases, one exit and P0–P9 row each, pinned require/forbid populations, and rejects malformed/duplicate/unknown rows; shrink is a negative control.
+- B4 RED: uid 1001 with a passwd HOME different from ambient HOME produced P0 PASS. P0 now binds uid, username, passwd HOME and shell and explicitly rejects root and sudo-with-inherited-HOME controls.
+- B5 RED: mode-0777 CLI, mode-0644 identity, and mode-0755 credential storage passed. P3/P4/P5 now apply target owner/group plus executable/shared/private policies; framework credential storage is created 0700.
+- B6 RED: fault injection only wrote `.selftest-*` files. The synthetic path was removed; the P2–P8 matrix enters the normal action flow, proves an action observation occurred, injects after each real phase, and fingerprints rollback.
+- B7 RED: an HTTP-200 empty body exits zero when piped to Bash. The fetched installer must now be non-empty, digest-equal to `tools/install.sh.sha256`, and that exact file is executed; failed/empty/mismatch controls are blocking and CI has a remote immutable-commit arm.
+- B8 RED: raw combined command output was duplicated to terminal and `commands.log`. Both capture layers now redact before output/persistence; a seeded canary is positively emitted by the fake credential-capable registry and must remain absent from terminal, command log, npmrc, generated files and observed argv. The real greenfield fixture also scans those populations.
+- Advisory code review findings are fixed: URL userinfo redaction now handles raw `@`, token-only and percent-encoded forms, repeated `:`, multiple URLs, Authorization/Basic, npm `_auth`, and Cookie headers in both capture layers; the real greenfield path positively emits its canary through `state_run_captured`; verified-fetch removes its temporary body after successful execution; and plaintext diagnostics exist only in process-substitution pipes rather than interruptible temporary files.
+- Advisory security review's independent trust-root finding is **DEFERRED by canonical PRD v2 §3**, which explicitly excludes signed provenance. README now states precisely that the same-origin sidecar detects empty/corrupt/inconsistent publication but cannot authenticate against repository/server compromise; no stronger claim remains.
+- The web1 no-manifest representativeness observation is recorded but intentionally not acted on: it is explicitly outside these eight blockers. This remediation does not weaken or otherwise change P9's manifest-presence assertion.
+
+## Verification log
+
+- `bash -n` and ShellCheck pass for all changed shell surfaces; `git diff --check` passes.
+- `bash tools/install-state-machine.test.sh` passes, including exact P0–P8 rows, passwd-HOME/privilege discrimination, owner/group/mode attacks, persisted P4/P6 action failures, no synthetic fault implementation, unsafe/overlapping/symlink roots, and fatal journal initialization.
+- `bash tools/install-next-lane.test.sh` passes inside `ci-base:latest`, including exact `@next` versions, immutable source fallback, source-build/archive-failure rollback, offline `--dev`, explicit refs, prerelease suffix mismatch, absolute P3 CLI propagation, secret redaction, real-action P2–P8 rollback, and stale projection recovery.
+- Comparator controls pass for verdict drift, unexpected exit, manifest shrink, missing phases, duplicate rows, unknown cases, and unknown kinds. Verified-fetch controls pass for successful execution and failed/empty/digest-mismatch rejection.
+- `bash tools/e2e-install-test.sh --lane next --source checkout --git present` returns the required expected RED in clean Debian/glibc as uid 1001: installer P0/P1/P2/P3/P7 PASS; P4/P5/P6/P8 and P9 blocking; no `Done.` claim; checkout archive digest pinned and current framework installer exercised. `tools/verify-greenfield-expected-red.sh` converts that expected detector result into a green CI assertion and fails on any unreviewed verdict drift.
+- Earlier repository gates passed: `pnpm typecheck`, `pnpm lint`, `pnpm format:check`, upgrade manifest/rollback/durable-snapshot/migration suites, and focused `@mosaicstack/mosaic` tests with an isolated npm prefix. Full exact-remediation rerun is required before push.

docs/scratchpads/rm-03-queue-guard.md

@@ -0,0 +1,120 @@
+# RM-03 — CI Queue Guard Repair
+
+- **Task:** RM-03
+- **Issue:** #1019
+- **Branch:** `fix/rm-03-queue-guard`
+- **Owner:** coder-mos1
+- **Reviewer:** rev-974 (independent; author != reviewer)
+- **Started:** 2026-08-01
+
+## Objective
+
+Repair the mandatory CI queue guard so it reads provider payloads, blocks asserted non-green CI, distinguishes provider unavailability from a real non-green result, and inspects the branch actually being pushed or merged.
+
+## Constraints
+
+- Worktree only: `/home/hermes/agent-work/rm-03`; never mutate `/src/mosaic-stack`.
+- JSON payload travels through stdin; never argv. Large payload must remain below no ARG_MAX dependency.
+- TDD is mandatory. Every behavior case must be observed red before implementation.
+- No bypass flags or hook suppression.
+- Do not cite the existing guard's green as evidence; D-23 establishes it is zero-information.
+- Gate-ready is a frozen exact head. Any push after a merge-gate verdict voids that verdict.
+- No merge: coordinator holds the merge hand pending Jason.
+
+## Design
+
+1. Feed JSON to `python3 -c` on stdin, including pending-context rendering.
+2. Classify valid green as `READY`; pending/failure/no-status/malformed/mixed as `ASSERTED_NOT_READY`; provider/credential/transport inability as `CANNOT_ASSERT`.
+3. `ASSERTED_NOT_READY` exits nonzero. `CANNOT_ASSERT` emits a loud diagnostic and appends a local JSONL audit record. Push degrades to exit 0; merge holds with distinct retryable exit 75 until provider recovery, then self-clears without manual reset. Inability to write the audit exits nonzero.
+4. Derive the current branch when `-B` is omitted. The merge wrapper passes the exact PR head branch, repository, and full commit SHA—not its `main` base—so fork PRs cannot resolve against an adjacent base-repository branch.
+
+## Test matrix
+
+| Case | Required outcome |
+| --- | --- |
+| success | exit 0; terminal-success |
+| pending | nonzero after bounded timeout |
+| failure | nonzero |
+| no-status | nonzero |
+| malformed | nonzero |
+| >=150 KiB payload | unchanged classification; never rc126 |
+| provider unreachable on push | loud audited CANNOT_ASSERT; degraded exit 0 |
+| provider unreachable on merge | loud audited CANNOT_ASSERT; retryable exit 75/HOLD |
+| audit unavailable | nonzero |
+| implicit push branch | provider URL uses checked-out feature branch |
+| merge wrapper | queue guard receives exact PR head branch/repository/full SHA |
+
+## RED-first evidence
+
+Observed against the unmodified `origin/main` implementation before source edits:
+
+- `bash packages/mosaic/framework/tools/git/test-ci-queue-wait-tristate.sh` → rc 1 with 15 failed assertions.
+- Success payload was reported `state=unknown`.
+- Pending, failure, no-status, and malformed payloads each exited 0 and omitted `ASSERTED_NOT_READY`.
+- The 160 KiB payload produced rc 141 because Python never consumed the pipe; it did not classify success.
+- Provider-unreachable exited 7 with no `CANNOT_ASSERT` audit record.
+- Implicit push queried `/branches/main`, not `/branches/fix/rm-03-fixture`.
+- Audit-unavailable emitted no audit diagnostic.
+- A credential-resolution hard-block mutant was then run before trusting that added case: `credential-unresolvable` returned rc 1 and omitted `CANNOT_ASSERT`; the matrix returned rc 1 with two named assertion failures.
+- Review-blocker controls were observed red: structurally invalid `statuses` string and null-entry payloads each exited 0 as `terminal-success`; unsupported-platform discovery exited 1 without diagnostic or audit (seven named assertion failures total).
+- After the push/merge asymmetry ruling, merge-side provider unavailability was observed red at rc 0; its registered case required distinct retryable rc 75.
+- Aggregate `state=success` with zero contexts was observed red: it exited 0 as `terminal-success`; the registered case requires `no-status`/nonzero.
+- Fork/exact-head controls were observed red: `pr-merge.sh` omitted the fork repository and full SHA, and an ignored-arguments mutant re-resolved through `/branches/` instead of the exact fork commit (two named failures).
+- GitHub check-run-only success/pending/failure were each misclassified as `no-status`; the RED run had five named failures and proved the Checks API was never queried.
+- The first merge-pin control was unrunnable because one `local` declaration referenced a variable before assignment under `set -u`; this was disclosed and corrected rather than counted. The runnable RED then showed Gitea payload `{"Do":"squash"}` lacked `head_commit_id`; a separate GitHub run showed `gh pr merge 123 --squash` lacked `--match-head-commit`.
+- A stale-verdict mutant removed the `--expect-head` comparison and was observed red because a moved head reached the provider merge call.
+- `bash packages/mosaic/framework/tools/git/test-pr-merge-queue-branch.sh` initially returned rc 1; captured call was `--purpose merge -B main -t 900 -i 15`.
+
+Logs remain untracked under the worktree as `.mosaic-test-work-red-*.log` and will not be committed.
+
+## Progress
+
+- [x] Mission, remediation charter, task evidence, board, issue #1019, and superseded PR #1023 read.
+- [x] Isolated worktree created and identity configured coherently.
+- [x] Mutant tests authored and observed red.
+- [x] Implementation green.
+- [x] Baseline and focused situational gates green; full package suite has an unrelated framework-shell environment abort recorded below.
+- [ ] Independent review clean (rev-974 requested changes at `44ffa99a`; bypass remediation committed and awaiting re-review).
+- [ ] PR CI terminal-green at exact head by full step scan.
+- [ ] Merge-gate verdict issued against frozen head.
+
+## Scope disposition
+
+- The five framework guides are consequential documentation: they define the purpose-aware tri-state contract, including audited push degradation and merge HOLD.
+- The agent templates are consequential because they ship the same queue-guard instructions into newly seeded agent contracts; leaving them binary/stale would contradict the repaired tool.
+- `pr-merge.sh` is consequential: it must inspect the PR's exact head branch/repository/SHA and enforce the exact-head merge pin.
+- `pr-metadata.sh` is consequential only as the normalized source of that head branch/repository/SHA. Its diff is limited to exposing those fields on GitHub and Gitea.
+- `test-pr-merge-gitea-empty-uid.sh` changes because exact-head Gitea merges now always use the API path (the only path that can send `head_commit_id`), superseding the prior tea-empty-identity fallback behavior.
+
+## Review remediation
+
+- rev-974 independently proved that the documented `--skip-queue-guard` merge option bypassed an exit-99 guard stub, reached the provider merge payload, printed success, and exited 0 at head `44ffa99a`.
+- RED-first reproduction was added to `test-pr-merge-head-pin.sh` before the production fix: `FAIL merge-bypass: --skip-queue-guard reached the provider merge path`, suite rc 1. The test-only commit is `241113e6`.
+- Production remediation `37aae650` removes the option from parsing, usage, help, and examples. Every merge-capable path now invokes the queue guard; `--dry-run` alone omits it and has a regression proving that it exits before provider dispatch and creates no merge payload.
+- Existing Gitea merge tests now exercise a successful guard response rather than bypassing the guard.
+
+## Risks / boundaries
+
+- The local JSONL audit is durable operational evidence but not tamper-resistant against the same UID. RM-03 does not claim otherwise.
+- Push-side audited exit 0 is an explicit owner ruling (Option B), accepted to avoid bricking recovery work; merge-side CANNOT_ASSERT remains retryable exit 75/HOLD. The automated security reviewer continues to flag the deliberate push availability tradeoff.
+- Source/deployed-copy equality is owned by RM-02/D-22; this branch changes repository source and its tests only.
+
+## Test evidence
+
+Fresh after rescue checkpoint `b7175012`:
+
+- Focused situational matrix: tri-state, GitHub checks pagination, branch-absent, merge head branch/repository/SHA, exact-head pin, and Gitea exact-head API regressions all passed.
+- `bash -n` on the three production shell scripts passed.
+- `shellcheck -x -P packages/mosaic/framework/tools/git ...` on all changed shell scripts passed.
+- `pnpm typecheck` passed (45/45 Turbo tasks).
+- `pnpm lint` passed (25/25 Turbo tasks).
+- `pnpm format:check` passed.
+- `pnpm --filter @mosaicstack/mosaic test`: Vitest passed 1508/1508 on the confirmation run; framework-shell then aborted at the pre-existing wake coordinate assertion with exit 97: `BASH_LINENO ... probe reported [3 5], expected [3 4] ... (#973)`. This is outside the RM-03 diff and is disclosed rather than substituted or called green.
+- The prior package-suite attempt had one transient, out-of-diff `install-ordering-guard.spec.ts` failure (1/1508); its isolated rerun passed 19/19 and the confirmation full Vitest run passed 1508/1508.
+- After bypass remediation: all six focused RM-03 queue/merge regressions passed, including bypass refusal and dry-run non-dispatch; shell syntax and source-aware ShellCheck passed; `pnpm typecheck`, `pnpm lint`, and `pnpm format:check` passed.
+- Fresh `test:framework-shell` reached and passed every RM-03 test, then again aborted at the unrelated wake coordinate assertion with exit 97; it remains explicitly non-green rather than substituted.
+- An ad hoc raw Prettier invocation over `.template` and `.sh` files was unrunnable because no parser is registered for those extensions; it was not used as a substitute for canonical `pnpm format:check`.
+
+## Final evidence
+
+Pending.

package.json

@@ -10,7 +10,8 @@
     "clean:generated": "node scripts/clean-generated.mjs",
     "typecheck": "pnpm preflight && turbo run typecheck",
     "test:checkout": "node --test scripts/*.test.mjs",
-    "test": "pnpm test:checkout && turbo run test",
+    "test": "pnpm test:checkout && turbo run test && pnpm run test:installer",
+    "test:installer": "bash tools/install-state-machine.test.sh && bash tools/install-next-lane.test.sh && bash tools/verify-greenfield-expected-red.test.sh && bash tools/verified-installer-fetch.test.sh",
     "format": "prettier --write \"**/*.{ts,tsx,js,jsx,json,md}\"",
     "format:check": "prettier --check \"**/*.{ts,tsx,js,jsx,json,md}\"",
     "prepare": "node scripts/install-hooks.mjs"

packages/mosaic/framework/guides/CI-CD-PIPELINES.md

@@ -925,14 +925,16 @@ Woodpecker note:
 Before pushing a branch or merging a PR, guard against overlapping project pipelines:
 
 ```bash
-~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push -B main
-~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose merge -B main
+~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push
+~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose merge -B <PR_HEAD_BRANCH> -R <PR_HEAD_OWNER/REPO> --sha <PR_HEAD_FULL_SHA>
 ```
 
 Behavior:
 
-- If pipeline state is running/queued/pending, wait until queue clears.
-- If timeout or API/auth failure occurs, treat as `blocked`, report exact failed wrapper command, and stop.
+- If pipeline state is running/queued/pending, wait until queue clears; timeout is `ASSERTED_NOT_READY` and exits nonzero.
+- Failure, missing status, malformed status, or any other provider-asserted non-green state is `ASSERTED_NOT_READY` and exits nonzero.
+- Credential, transport, or provider unavailability is `CANNOT_ASSERT`: the guard emits a loud diagnostic and durable JSONL audit record. For push it exits 0 so recovery work is not bricked. For merge it returns distinct retryable exit 75 and holds until provider recovery; rerunning then self-clears without manual reset. This result is never evidence that CI was clear. If the audit cannot be written, the guard exits nonzero.
+- `pr-merge.sh` resolves and guards the exact PR head repository and full SHA automatically, including fork PRs.
 
 ## Gitea as Unified Platform
 

packages/mosaic/framework/guides/CODE-REVIEW.md

@@ -13,7 +13,7 @@ Merge strategy enforcement (HARD RULE):
 - PR target for delivery is `main`.
 - Direct pushes to `main` are prohibited.
 - Merge to `main` MUST be squash-only.
-- Use `~/.config/mosaic/tools/git/pr-merge.sh -n {PR_NUMBER} -m squash` (or PowerShell equivalent).
+- Use `~/.config/mosaic/tools/git/pr-merge.sh -n {PR_NUMBER} -m squash --expect-head {approved_full_sha}` (or PowerShell equivalent).
 
 ## Review Checklist
 

packages/mosaic/framework/guides/E2E-DELIVERY.md

@@ -79,7 +79,7 @@ For implementation work, you MUST run this cycle in order:
 8. `pre-push queue guard` - before pushing, wait for running/queued project pipelines to clear: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push`.
 9. `push` - push immediately after queue guard passes.
 10. `PR integration` - if external git provider is available, create/update PR to `main` and merge with required strategy via Mosaic wrappers.
-11. `pre-merge queue guard` - before merging PR, wait for running/queued project pipelines to clear: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose merge`.
+11. `pre-merge queue guard` - before merging PR, wait for running/queued project pipelines on the exact PR head to clear: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose merge -B <PR_HEAD_BRANCH> -R <PR_HEAD_OWNER/REPO> --sha <PR_HEAD_FULL_SHA>`.
 12. `CI/pipeline verification` - wait for terminal CI status and require green before completion (`~/.config/mosaic/tools/git/pr-ci-wait.sh` for PR-based workflow).
 13. `issue closure` - close linked external issue (or close internal `docs/TASKS.md` task ref when provider is unavailable).
 14. `greenfield situational test` - validate required user flows in a clean environment/startup path (post-merge for trunk workflow changes).
@@ -93,8 +93,8 @@ For implementation work, you MUST run this cycle in order:
 > the gate (AGENTS.md hard gate "Merge authority"). Solo delivery proceeds
 > without asking.
 
-1. `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose merge -B main`
-2. `~/.config/mosaic/tools/git/pr-merge.sh -n <PR_NUMBER> -m squash`
+1. `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose merge -B <PR_HEAD_BRANCH> -R <PR_HEAD_OWNER/REPO> --sha <PR_HEAD_FULL_SHA>`
+2. `~/.config/mosaic/tools/git/pr-merge.sh -n <PR_NUMBER> -m squash --expect-head <APPROVED_FULL_SHA>`
 3. `~/.config/mosaic/tools/git/pr-ci-wait.sh -n <PR_NUMBER>`
 4. `~/.config/mosaic/tools/git/issue-close.sh -i <ISSUE_NUMBER>` (or close internal `docs/TASKS.md` ref when no provider exists)
 5. If any step fails: set status `blocked`, report the exact failed wrapper command, and stop.

packages/mosaic/framework/guides/ORCHESTRATOR.md

@@ -425,11 +425,11 @@ git push
     and checklist completed (`~/.config/mosaic/templates/docs/DOCUMENTATION-CHECKLIST.md`) when applicable.
 13. **PR + CI + Issue Closure Gate** (HARD RULE for source-code tasks):
     - Before merging, run queue guard:
-      `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose merge -B main`
+      `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose merge -B <PR_HEAD_BRANCH> -R <PR_HEAD_OWNER/REPO> --sha <PR_HEAD_FULL_SHA>`
     - Ensure PR exists for the task branch (create/update via wrappers if needed):
       `~/.config/mosaic/tools/git/pr-create.sh ... -B main`
     - Merge via wrapper:
-      `~/.config/mosaic/tools/git/pr-merge.sh -n {PR_NUMBER} -m squash`
+      `~/.config/mosaic/tools/git/pr-merge.sh -n {PR_NUMBER} -m squash --expect-head {approved_full_sha}`
     - Wait for terminal CI status:
       `~/.config/mosaic/tools/git/pr-ci-wait.sh -n {PR_NUMBER}`
     - Close linked issue after merge + green CI:
@@ -630,7 +630,7 @@ Construct this from the task row and pass to worker via Task tool:
 
 **MANDATORY:** This ALWAYS includes linting. If the project has a linter configured
 (ESLint, Biome, ruff, etc.), you MUST run it and fix ALL violations in files you touched.
-Do NOT leave lint warnings or errors for someone else to clean up. 6. Run REQUIRED situational tests based on changed surfaces (see `~/.config/mosaic/guides/E2E-DELIVERY.md` and `~/.config/mosaic/guides/QA-TESTING.md`). 7. If task is bug fix/security/auth/critical business logic, apply REQUIRED TDD discipline per `~/.config/mosaic/guides/QA-TESTING.md`. 8. If gates or required situational tests fail: Fix and retry. Do NOT report success with failures. 9. Commit: `git commit -m "fix({finding_id}): brief description"` 10. Before push, run queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push -B main` 11. Push: `git push origin {branch}` 12. Report result as JSON (see format below)
+Do NOT leave lint warnings or errors for someone else to clean up. 6. Run REQUIRED situational tests based on changed surfaces (see `~/.config/mosaic/guides/E2E-DELIVERY.md` and `~/.config/mosaic/guides/QA-TESTING.md`). 7. If task is bug fix/security/auth/critical business logic, apply REQUIRED TDD discipline per `~/.config/mosaic/guides/QA-TESTING.md`. 8. If gates or required situational tests fail: Fix and retry. Do NOT report success with failures. 9. Commit: `git commit -m "fix({finding_id}): brief description"` 10. Before push, run queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push -B {branch}` 11. Push: `git push origin {branch}` 12. Report result as JSON (see format below)
 
 ## Git Scripts
 
@@ -638,8 +638,9 @@ For issue/PR/milestone operations, use scripts (NOT raw tea/gh):
 
 - `~/.config/mosaic/tools/git/issue-view.sh -i {N}`
 - `~/.config/mosaic/tools/git/pr-create.sh -t "Title" -b "Desc" -B main`
-- `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push|merge -B main`
-- `~/.config/mosaic/tools/git/pr-merge.sh -n {PR_NUMBER} -m squash`
+- Push: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push -B {task_branch}`
+- Merge: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose merge -B {pr_head_branch} -R {pr_head_owner/repo} --sha {pr_head_full_sha}`
+- `~/.config/mosaic/tools/git/pr-merge.sh -n {PR_NUMBER} -m squash --expect-head {approved_full_sha}`
 - `~/.config/mosaic/tools/git/pr-ci-wait.sh -n {PR_NUMBER}`
 - `~/.config/mosaic/tools/git/issue-close.sh -i {N}`
 

packages/mosaic/framework/guides/TOOLS-REFERENCE.md

@@ -23,10 +23,12 @@ Mosaic wrappers at `~/.config/mosaic/tools/git/*.sh` handle platform detection a
 # Milestones
 ~/.config/mosaic/tools/git/milestone-create.sh
 
-# CI queue guard (required before push/merge)
+# CI queue guard (required before push/merge; defaults to the checked-out branch)
 ~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push|merge
 ```
 
+The guard exits nonzero for any provider-asserted non-green, missing, or malformed CI state. If credentials or the provider are unavailable, it emits `CANNOT_ASSERT` and writes a JSONL audit record. Push degrades to exit 0 so recovery work is not bricked; merge holds with retryable exit 75 until the provider recovers, then self-clears without manual reset. Neither outcome is evidence that CI was clear. `pr-merge.sh` automatically inspects the exact PR head repository and full commit SHA rather than its `main` base; this also handles fork PRs without branch-name ambiguity. Pass `--expect-head <approved-full-sha>` to bind a commit-specific review or merge-gate verdict; Gitea uses atomic `head_commit_id` and GitHub uses `--match-head-commit`.
+
 ### Code Review (Codex)
 
 ```bash

packages/mosaic/framework/install.sh

@@ -58,6 +58,7 @@ done
 # packages/mosaic/src/framework/manifest.ts — both consume framework-manifest.txt.
 # Sourcing does not run its CLI dispatch (guarded by BASH_SOURCE==$0).
 # shellcheck source=tools/_lib/manifest.sh
+# shellcheck disable=SC1091 # Dynamic SOURCE_DIR; the path is validated by set -e.
 source "$SOURCE_DIR/tools/_lib/manifest.sh"
 
 # Which paths a keep-mode upgrade may touch is no longer a hand-maintained
@@ -222,12 +223,14 @@ prune_durable_snapshots() {
   [[ "$keep" =~ ^[0-9]+$ ]] && (( keep >= 1 )) || keep=5
   list="$(mktemp)"
   if ! find "$root" -maxdepth 1 -type d -name 'pre-update-*' > "$list"; then
+    warn "Backup pruning skipped; policy: retention cleanup is optional and a failed enumeration must preserve every existing recovery snapshot."
     rm -f "$list"; return 0
   fi
   # Newest-first ordering needs `sort` (`-o` writes back in place — no `mv`
   # dependency); if it is somehow unavailable, leave the backups untouched rather
   # than risk pruning in an undefined order.
   if ! LC_ALL=C sort -r -o "$list" "$list" 2>/dev/null; then
+    warn "Backup pruning skipped; policy: ordering failure preserves all snapshots rather than risking deletion in an undefined order."
     rm -f "$list"; return 0
   fi
   while IFS= read -r d; do
@@ -266,7 +269,11 @@ make_durable_snapshot() {
     warn "Durable snapshot skipped: cannot create backup dir $root (upgrade continues; operator files remain manifest-protected)."
     return 0
   fi
-  chmod 700 "$root" 2>/dev/null || true
+  if ! chmod 700 "$root"; then
+    umask "$old_umask"
+    warn "Durable snapshot skipped: backup root permissions could not be made private; policy: never write operator data to an insufficiently protected location."
+    return 0
+  fi
   dir="$root/pre-update-$ts"
   if [[ -e "$dir" ]]; then           # same-second re-run: disambiguate
     local n=1; while [[ -e "$dir-$n" ]]; do n=$((n + 1)); done; dir="$dir-$n"
@@ -281,7 +288,10 @@ make_durable_snapshot() {
   if ! enumerate_operator_files "$list"; then
     umask "$old_umask"
     warn "Durable snapshot skipped: could not enumerate operator files (upgrade continues)."
-    rm -f "$list"; rmdir "$dir" 2>/dev/null || true
+    rm -f "$list"
+    if ! rmdir "$dir"; then
+      warn "Durable snapshot cleanup left $dir in place; policy: preserve unexpected content rather than deleting it recursively."
+    fi
     return 0
   fi
   while IFS= read -r -d '' rel; do
@@ -292,12 +302,18 @@ make_durable_snapshot() {
       warn "Durable snapshot: could not copy operator file '$rel' (skipped)."
       continue
     fi
-    chmod 600 "$dst" 2>/dev/null || true
+    if ! chmod 600 "$dst"; then
+      rm -f "$dst"
+      warn "Durable snapshot: copied '$rel' could not be made private and was removed; policy: do not retain an insecure recovery copy."
+      continue
+    fi
     count=$((count + 1))
   done < "$list"
   rm -f "$list"
-  # Tighten every dir the copy created (mkdir -p honors umask, but be explicit).
-  find "$dir" -type d -exec chmod 700 {} + 2>/dev/null || true
+  # Tighten every dir the copy created (mkdir -p already honored umask 077).
+  if ! find "$dir" -type d -exec chmod 700 {} +; then
+    warn "Durable snapshot directory permission recheck failed; policy: continue because every directory was created under umask 077, while retaining the diagnostic."
+  fi
   umask "$old_umask"   # UMASK-RESTORE-NORMAL — restore before the upgrade proper resumes (see above)
   DURABLE_SNAPSHOT_DIR="$dir"
   ok "Durable pre-update snapshot: $count operator file(s) saved to $dir (recover with: mosaic restore --list)"
@@ -344,7 +360,9 @@ verify_operator_surface() {
         continue
       fi
       if cp "$snap" "$cur"; then
-        chmod 600 "$cur" 2>/dev/null || true
+        if ! chmod 600 "$cur"; then
+          warn "Operator file '$rel' was restored but its mode could not be tightened to 0600; policy: preserve recovered content and require manual permission repair."
+        fi
         warn "Operator file was modified by the upgrade and has been restored from the pre-update snapshot: $rel"
         healed=$((healed + 1))
       else
@@ -535,7 +553,7 @@ sync_framework_keep() {
     # (unreadable dir) is surfaced as a warning rather than silently swallowed;
     # the "directory not empty" races we tolerate are ignored via -delete's own
     # rc, not by hiding stderr — so a real error is still visible to the operator.
-    if ! find "$dst/$root" -type d -empty -delete 2>/dev/null; then
+    if ! find "$dst/$root" -type d -empty -delete; then
       warn "prune: could not fully sweep empty framework dirs under $root (left as-is)"
     fi
   done < <(manifest_subtree_roots)
@@ -581,7 +599,7 @@ run_migrations() {
     MIGRATION_REMOVED_PATHS+=("bin" "rails")
     if [[ -d "$TARGET_DIR/bin" ]]; then
       ok "Removing legacy bin/ directory (executables now in npm CLI)"
-      rm -rf "$TARGET_DIR/bin"
+      rm -rf "${TARGET_DIR:?}/bin"
     fi
 
     # Remove old mosaic PATH entry from shell profiles
@@ -692,9 +710,11 @@ trap 'restore_snapshot; exit 1' ERR INT TERM
 
 sync_framework
 
-# Ensure persistent directories exist
+# Ensure persistent directories exist. Credentials are private material and
+# must never inherit a permissive umask/default mode.
 mkdir -p "$TARGET_DIR/memory"
 mkdir -p "$TARGET_DIR/credentials"
+chmod 0700 "$TARGET_DIR/credentials"
 
 # Reconcile contract files from defaults/ into the framework root: framework-owned
 # files (CONSTITUTION/AGENTS/STANDARDS) are overwritten every upgrade (a divergent
@@ -706,13 +726,23 @@ mkdir -p "$TARGET_DIR/credentials"
 # by `mosaic init` from templates with user-supplied values.
 reconcile_framework_files
 
-# Ensure tool scripts are executable
-find "$TARGET_DIR/tools" -name "*.sh" -exec chmod +x {} + 2>/dev/null || true
-find "$TARGET_DIR/tools/_scripts" -type f -exec chmod +x {} + 2>/dev/null || true
+# Ensure tool scripts are executable. These are P4 postconditions, not
+# best-effort cleanup: a chmod failure leaves shipped tools unloadable.
+if ! find "$TARGET_DIR/tools" -name "*.sh" -exec chmod +x {} +; then
+  fail "Could not mark shipped shell tools executable."
+  exit 1
+fi
+if ! find "$TARGET_DIR/tools/_scripts" -type f -exec chmod +x {} +; then
+  fail "Could not mark shipped runtime scripts executable."
+  exit 1
+fi
 # git-credential-mosaic (per-agent Gitea identity helper) ships without a .sh
-# suffix — git resolves credential helpers by exact name/path, not extension —
-# so the *.sh glob above does not cover it; chmod it explicitly.
-[[ -f "$TARGET_DIR/tools/git/git-credential-mosaic" ]] && chmod +x "$TARGET_DIR/tools/git/git-credential-mosaic" 2>/dev/null || true
+# suffix — git resolves credential helpers by exact name/path, not extension.
+if [[ -f "$TARGET_DIR/tools/git/git-credential-mosaic" ]] \
+  && ! chmod +x "$TARGET_DIR/tools/git/git-credential-mosaic"; then
+  fail "Could not mark git-credential-mosaic executable."
+  exit 1
+fi
 
 ok "Framework synced to $TARGET_DIR"
 
@@ -739,49 +769,162 @@ step "Post-install tasks"
 
 SCRIPTS="$TARGET_DIR/tools/_scripts"
 
+# Capture every fallible post-install command. A failure's text is surfaced and
+# also appended to the parent transaction's private command log. Failure to
+# write that log is fatal: continuing would recreate the false-clean diagnosis
+# INV-C forbids.
+record_phase_outcome() {
+  local phase="$1" status="$2" reason="$3"
+  [[ -n "${MOSAIC_INSTALL_PHASE_STATUS_FILE:-}" ]] || return 0
+  if ! printf '%s\t%s\t%s\n' "$phase" "$status" "$reason" >> "$MOSAIC_INSTALL_PHASE_STATUS_FILE" \
+    || ! sync "$MOSAIC_INSTALL_PHASE_STATUS_FILE"; then
+    fail "Could not durably record $phase action outcome for the parent transaction."
+    exit 1
+  fi
+}
+
+redact_install_stream() {
+  # Keep this bootstrap copy behaviorally identical to tools/install.sh's
+  # state_redact_stream; neither installer can assume the other is installed.
+  python3 /dev/fd/3 3<<'PY'
+import os, re, sys
+text = sys.stdin.read()
+secret_name = re.compile(r"(?:TOKEN|PASSWORD|PASSWD|SECRET|API_KEY|AUTH|CREDENTIAL|CANARY)", re.I)
+secrets = {value for name, value in os.environ.items() if secret_name.search(name) and len(value) >= 4}
+for value in sorted(secrets, key=len, reverse=True):
+    text = text.replace(value, "[REDACTED]")
+patterns = (
+    (re.compile(r"(?im)^(\s*(?:proxy-)?authorization\s*:\s*)[^\r\n]+"), r"\1[REDACTED]"),
+    (re.compile(r"(?im)^(\s*(?:set-)?cookie\s*:\s*)[^\r\n]+"), r"\1[REDACTED]"),
+    (re.compile(r"(?i)(Bearer\s+)[^\s'\"]+"), r"\1[REDACTED]"),
+    (re.compile(r"(?i)((?:[_-]?auth(?:Token)?|token|password|passwd|secret|api[_-]?key)\s*[=:]\s*)[^\s'\"]+"), r"\1[REDACTED]"),
+)
+for pattern, replacement in patterns:
+    text = pattern.sub(replacement, text)
+url_pattern = re.compile(r"https?://[^\s'\"<>]+", re.I)
+def redact_url(match):
+    url = match.group(0)
+    scheme_end = url.find("://") + 3
+    authority_end = len(url)
+    for separator in "/?#":
+        position = url.find(separator, scheme_end)
+        if position != -1:
+            authority_end = min(authority_end, position)
+    authority = url[scheme_end:authority_end]
+    at = authority.rfind("@")
+    if at != -1:
+        return url[:scheme_end] + "[REDACTED]@" + authority[at + 1:] + url[authority_end:]
+    return url
+sys.stdout.write(url_pattern.sub(redact_url, text))
+PY
+}
+
+run_captured() {
+  local label="$1" redacted redactor_pid capture_fd status=0 redact_status=0
+  shift
+  redacted="$(mktemp "${TMPDIR:-/tmp}/mosaic-post-redacted.XXXXXX")"
+  chmod 0600 "$redacted" || { rm -f "$redacted"; exit 1; }
+  # Preserve in-shell command behavior without ever staging plaintext output on
+  # disk. Process substitution carries raw bytes only through a pipe.
+  exec {capture_fd}> >(redact_install_stream > "$redacted")
+  redactor_pid=$!
+  set +e
+  "$@" >&"$capture_fd" 2>&1
+  status=$?
+  exec {capture_fd}>&-
+  wait "$redactor_pid"
+  redact_status=$?
+  set -e
+  if [[ "$redact_status" -ne 0 ]]; then
+    rm -f "$redacted"
+    fail "Could not redact '$label' diagnostics; refusing to expose or persist raw output."
+    exit 1
+  fi
+  if [[ -n "${MOSAIC_INSTALL_COMMAND_LOG:-}" ]]; then
+    if ! { printf '\n=== %s (exit=%s) ===\n' "$label" "$status"; cat "$redacted"; } >> "$MOSAIC_INSTALL_COMMAND_LOG" \
+      || ! sync "$MOSAIC_INSTALL_COMMAND_LOG"; then
+      cat "$redacted" >&2
+      rm -f "$redacted"
+      fail "Could not durably append '$label' diagnostics to the install command log."
+      exit 1
+    fi
+  fi
+  if [[ "$status" -ne 0 ]]; then cat "$redacted" >&2; fi
+  rm -f "$redacted"
+  return "$status"
+}
+
 if [[ -x "$SCRIPTS/mosaic-link-runtime-assets" ]]; then
   link_args=()
   [[ "$ALLOW_INACTIVE_ENFORCEMENT" == "1" ]] && link_args+=(--allow-inactive-enforcement)
-  # stdout is suppressed as before, but stderr is left connected: the
-  # install-ordering guard's FAIL LOUD message (#869 Point-1 C2) must reach
-  # the operator, not be swallowed silently.
-  if "$SCRIPTS/mosaic-link-runtime-assets" "${link_args[@]}" >/dev/null; then
+  if run_captured "runtime asset linking" "$SCRIPTS/mosaic-link-runtime-assets" "${link_args[@]}"; then
+    record_phase_outcome P6 committed "runtime asset linker exited zero"
     ok "Runtime assets linked"
   else
-    warn "Runtime asset linking failed (non-fatal) — see message above for details."
+    record_phase_outcome P6 failed "runtime asset linker exited non-zero"
+    warn "Runtime asset linking did not commit; policy: continue only to enumerate all phase diagnostics, while P6/P9 remain blocking."
   fi
+else
+  record_phase_outcome P6 failed "required runtime asset linker is missing or not executable"
+  warn "Runtime asset linking was not attempted; policy: a missing required linker remains a blocking P6/P9 failure."
 fi
 
 if [[ -x "$SCRIPTS/mosaic-ensure-sequential-thinking" ]]; then
-  if "$SCRIPTS/mosaic-ensure-sequential-thinking" >/dev/null 2>&1; then
+  if run_captured "sequential-thinking setup" "$SCRIPTS/mosaic-ensure-sequential-thinking"; then
     ok "sequential-thinking MCP configured"
+  elif [[ "${MOSAIC_ALLOW_MISSING_SEQUENTIAL_THINKING:-0}" == "1" ]]; then
+    record_phase_outcome P6 failed "sequential-thinking setup failed under diagnostic-continuation compatibility mode"
+    warn "sequential-thinking setup did not commit; policy: the unified installer compatibility flag allows diagnostic continuation, while P6/P9 remain blocking."
   else
-    if [[ "${MOSAIC_ALLOW_MISSING_SEQUENTIAL_THINKING:-0}" == "1" ]]; then
-      warn "sequential-thinking MCP setup bypassed (MOSAIC_ALLOW_MISSING_SEQUENTIAL_THINKING=1)"
-    else
-      fail "sequential-thinking MCP setup failed (hard requirement)."
-      exit 1
-    fi
+    fail "sequential-thinking MCP setup failed (hard requirement)."
+    exit 1
   fi
 fi
 
 if [[ -x "$SCRIPTS/mosaic-ensure-excalidraw" ]]; then
-  "$SCRIPTS/mosaic-ensure-excalidraw" >/dev/null 2>&1 && ok "excalidraw MCP configured" || warn "excalidraw MCP setup failed (non-fatal)"
+  if run_captured "excalidraw setup" "$SCRIPTS/mosaic-ensure-excalidraw"; then
+    ok "excalidraw MCP configured"
+  else
+    warn "excalidraw setup did not commit; policy: optional integration failure is retained in the journal and does not define core install readiness."
+  fi
 fi
 
-if [[ "${MOSAIC_SKIP_SKILLS_SYNC:-0}" != "1" ]] && [[ -x "$SCRIPTS/mosaic-sync-skills" ]]; then
-  "$SCRIPTS/mosaic-sync-skills" >/dev/null 2>&1 && ok "Skills synced" || warn "Skills sync failed (non-fatal)"
+if [[ "${MOSAIC_SKIP_SKILLS_SYNC:-0}" == "1" ]]; then
+  record_phase_outcome P4 failed "required skills sync explicitly skipped"
+  warn "Skills sync was skipped; policy: diagnostic continuation is allowed, but P4/P9 cannot certify an incomplete requested framework install."
+elif [[ -x "$SCRIPTS/mosaic-sync-skills" ]]; then
+  if run_captured "skills sync" "$SCRIPTS/mosaic-sync-skills"; then
+    record_phase_outcome P4 committed "skills sync exited zero"
+    ok "Skills synced"
+  else
+    record_phase_outcome P4 failed "skills sync exited non-zero"
+    warn "Skills sync did not commit; policy: continue to collect P4 diagnostics, but P4/P9 must not certify the install."
+  fi
+else
+  record_phase_outcome P4 failed "required skills sync command is missing or not executable"
+  warn "Skills sync was not attempted; policy: a missing required sync command remains a blocking P4/P9 failure."
 fi
 
 if [[ -x "$SCRIPTS/mosaic-migrate-local-skills" ]]; then
-  "$SCRIPTS/mosaic-migrate-local-skills" --apply >/dev/null 2>&1 && ok "Local skills migrated" || warn "Local skill migration failed (non-fatal)"
+  if run_captured "local skills migration" "$SCRIPTS/mosaic-migrate-local-skills" --apply; then
+    ok "Local skills migrated"
+  else
+    record_phase_outcome P4 failed "local skills migration exited non-zero"
+    warn "Local skill migration did not commit; policy: preserve user content and continue diagnostics, while P4/P9 remain blocking."
+  fi
 fi
 
 if [[ -x "$SCRIPTS/mosaic-doctor" ]]; then
-  "$SCRIPTS/mosaic-doctor" >/dev/null 2>&1 && ok "Health audit passed" || warn "Health audit reported issues — run 'mosaic doctor' for details"
+  if run_captured "health audit" "$SCRIPTS/mosaic-doctor"; then
+    ok "Health audit passed"
+  else
+    warn "Health audit found unresolved state; policy: preserve its diagnostics and let P9 issue the authoritative failure."
+  fi
 fi
 
-# Write version stamp AFTER everything succeeds
+# The version stamp records the successfully committed framework file sync.
+# Post-install failures are carried separately into P4/P6 and cannot be erased
+# by this stamp.
 write_framework_version
 
 # ── Summary ──────────────────────────────────────────────────

packages/mosaic/framework/templates/agent/AGENTS.md.template

@@ -9,7 +9,7 @@
 2. Do NOT ask for routine confirmation before required push/merge/issue-close/release/tag actions.
 3. Completion is forbidden at PR-open stage.
 4. Completion requires merged PR to `main` + terminal green CI + linked issue/internal task closed.
-5. Before push or merge, run queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push|merge -B main`.
+5. Before push or merge, run the queue guard against the push branch or the merge PR's exact head repository/SHA (`ci-queue-wait.sh --help`); `pr-merge.sh` supplies exact merge metadata automatically.
 6. For issue/PR/milestone operations, use Mosaic wrappers first (`~/.config/mosaic/tools/git/*.sh`).
 7. If any required wrapper command fails: report `blocked` with the exact failed wrapper command and stop.
 8. Do NOT stop at "PR created" and do NOT ask "should I merge?" for routine flow.
@@ -88,7 +88,7 @@ Reference:
 5. Do not mark implementation complete until PR is merged.
 6. Do not mark implementation complete until CI/pipeline status is terminal green.
 7. Close linked issues/tasks only after merge + green CI.
-8. Before push or merge, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push|merge -B main`.
+8. Before push or merge, run the CI queue guard against the push branch or the merge PR's exact head repository/SHA (`ci-queue-wait.sh --help`); `pr-merge.sh` supplies exact merge metadata automatically.
 
 ## Container Release Strategy (When Applicable)
 

packages/mosaic/framework/templates/agent/CLAUDE.md.template

@@ -147,9 +147,9 @@ Do NOT stop at "PR created" and do NOT ask "should I merge?" or "should I close
 5. Ensure `docs/PRD.md` or `docs/PRD.json` exists and is current before coding.
 6. Create scratchpad: `docs/scratchpads/{task-id}-{short-name}.md` and include issue/internal ref.
 7. Update `docs/TASKS.md` status + issue/internal ref before coding.
-8. Before push, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push -B main`.
+8. Before push, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push`.
 9. Open PR to `main` for delivery changes (no direct push to `main`).
-10. Before merge, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose merge -B main`.
+10. Before merge, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose merge -B <PR_HEAD_BRANCH> -R <PR_HEAD_OWNER/REPO> --sha <PR_HEAD_FULL_SHA>`.
 11. Merge PRs that pass required checks and review gates with squash strategy only.
 12. Reference issues/internal refs in commits (`Fixes #123`, `Refs #123`, or `Refs TASKS:T1`).
 13. Close issue/internal task only after testing and documentation gates pass, PR merge is complete, and CI/pipeline status is terminal green.

packages/mosaic/framework/templates/agent/projects/django/AGENTS.md.template

@@ -9,7 +9,7 @@
 2. Do NOT ask for routine confirmation before required push/merge/issue-close/release/tag actions.
 3. Completion is forbidden at PR-open stage.
 4. Completion requires merged PR to `main` + terminal green CI + linked issue/internal task closed.
-5. Before push or merge, run queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push|merge -B main`.
+5. Before push or merge, run the queue guard against the push branch or the merge PR's exact head repository/SHA (`ci-queue-wait.sh --help`); `pr-merge.sh` supplies exact merge metadata automatically.
 6. For issue/PR/milestone operations, use Mosaic wrappers first (`~/.config/mosaic/tools/git/*.sh`).
 7. If any required wrapper command fails: report `blocked` with the exact failed wrapper command and stop.
 8. Do NOT stop at "PR created" and do NOT ask "should I merge?" for routine flow.
@@ -97,7 +97,7 @@ Reference:
 5. Do not mark implementation complete until PR is merged.
 6. Do not mark implementation complete until CI/pipeline status is terminal green.
 7. Close linked issues/tasks only after merge + green CI.
-8. Before push or merge, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push|merge -B main`.
+8. Before push or merge, run the CI queue guard against the push branch or the merge PR's exact head repository/SHA (`ci-queue-wait.sh --help`); `pr-merge.sh` supplies exact merge metadata automatically.
 
 
 ## Container Release Strategy (When Applicable)

packages/mosaic/framework/templates/agent/projects/django/CLAUDE.md.template

@@ -198,9 +198,9 @@ Do NOT stop at "PR created" and do NOT ask "should I merge?" or "should I close
 5. Ensure `docs/PRD.md` or `docs/PRD.json` exists and is current before coding.
 6. Create scratchpad: `docs/scratchpads/{task-id}-{short-name}.md` and include issue/internal ref.
 7. Update `docs/TASKS.md` status + issue/internal ref before coding.
-8. Before push, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push -B main`.
+8. Before push, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push`.
 9. Open PR to `main` for delivery changes (no direct push to `main`).
-10. Before merge, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose merge -B main`.
+10. Before merge, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose merge -B <PR_HEAD_BRANCH> -R <PR_HEAD_OWNER/REPO> --sha <PR_HEAD_FULL_SHA>`.
 11. Merge PRs that pass required checks and review gates with squash strategy only.
 12. Reference issues/internal refs in commits (`Fixes #123`, `Refs #123`, or `Refs TASKS:T1`).
 13. Close issue/internal task only after testing and documentation gates pass, PR merge is complete, and CI/pipeline status is terminal green.

packages/mosaic/framework/templates/agent/projects/nestjs-nextjs/AGENTS.md.template

@@ -9,7 +9,7 @@
 2. Do NOT ask for routine confirmation before required push/merge/issue-close/release/tag actions.
 3. Completion is forbidden at PR-open stage.
 4. Completion requires merged PR to `main` + terminal green CI + linked issue/internal task closed.
-5. Before push or merge, run queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push|merge -B main`.
+5. Before push or merge, run the queue guard against the push branch or the merge PR's exact head repository/SHA (`ci-queue-wait.sh --help`); `pr-merge.sh` supplies exact merge metadata automatically.
 6. For issue/PR/milestone operations, use Mosaic wrappers first (`~/.config/mosaic/tools/git/*.sh`).
 7. If any required wrapper command fails: report `blocked` with the exact failed wrapper command and stop.
 8. Do NOT stop at "PR created" and do NOT ask "should I merge?" for routine flow.
@@ -101,7 +101,7 @@ Reference:
 5. Do not mark implementation complete until PR is merged.
 6. Do not mark implementation complete until CI/pipeline status is terminal green.
 7. Close linked issues/tasks only after merge + green CI.
-8. Before push or merge, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push|merge -B main`.
+8. Before push or merge, run the CI queue guard against the push branch or the merge PR's exact head repository/SHA (`ci-queue-wait.sh --help`); `pr-merge.sh` supplies exact merge metadata automatically.
 
 
 ## Container Release Strategy (When Applicable)

packages/mosaic/framework/templates/agent/projects/nestjs-nextjs/CLAUDE.md.template

@@ -230,9 +230,9 @@ Do NOT stop at "PR created" and do NOT ask "should I merge?" or "should I close
 5. Ensure `docs/PRD.md` or `docs/PRD.json` exists and is current before coding.
 6. Create scratchpad: `docs/scratchpads/{task-id}-{short-name}.md` and include issue/internal ref.
 7. Update `docs/TASKS.md` status + issue/internal ref before coding.
-8. Before push, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push -B main`.
+8. Before push, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push`.
 9. Open PR to `main` for delivery changes (no direct push to `main`).
-10. Before merge, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose merge -B main`.
+10. Before merge, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose merge -B <PR_HEAD_BRANCH> -R <PR_HEAD_OWNER/REPO> --sha <PR_HEAD_FULL_SHA>`.
 11. Merge PRs that pass required checks and review gates with squash strategy only.
 12. Reference issues/internal refs in commits (`Fixes #123`, `Refs #123`, or `Refs TASKS:T1`).
 13. Close issue/internal task only after testing and documentation gates pass, PR merge is complete, and CI/pipeline status is terminal green.

packages/mosaic/framework/templates/agent/projects/python-fastapi/AGENTS.md.template

@@ -9,7 +9,7 @@
 2. Do NOT ask for routine confirmation before required push/merge/issue-close/release/tag actions.
 3. Completion is forbidden at PR-open stage.
 4. Completion requires merged PR to `main` + terminal green CI + linked issue/internal task closed.
-5. Before push or merge, run queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push|merge -B main`.
+5. Before push or merge, run the queue guard against the push branch or the merge PR's exact head repository/SHA (`ci-queue-wait.sh --help`); `pr-merge.sh` supplies exact merge metadata automatically.
 6. For issue/PR/milestone operations, use Mosaic wrappers first (`~/.config/mosaic/tools/git/*.sh`).
 7. If any required wrapper command fails: report `blocked` with the exact failed wrapper command and stop.
 8. Do NOT stop at "PR created" and do NOT ask "should I merge?" for routine flow.
@@ -87,7 +87,7 @@ Reference:
 5. Do not mark implementation complete until PR is merged.
 6. Do not mark implementation complete until CI/pipeline status is terminal green.
 7. Close linked issues/tasks only after merge + green CI.
-8. Before push or merge, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push|merge -B main`.
+8. Before push or merge, run the CI queue guard against the push branch or the merge PR's exact head repository/SHA (`ci-queue-wait.sh --help`); `pr-merge.sh` supplies exact merge metadata automatically.
 
 ## Container Release Strategy (When Applicable)
 

packages/mosaic/framework/templates/agent/projects/python-fastapi/CLAUDE.md.template

@@ -146,9 +146,9 @@ Do NOT stop at "PR created" and do NOT ask "should I merge?" or "should I close
 5. Ensure `docs/PRD.md` or `docs/PRD.json` exists and is current before coding.
 6. Create scratchpad: `docs/scratchpads/{task-id}-{short-name}.md` and include issue/internal ref.
 7. Update `docs/TASKS.md` status + issue/internal ref before coding.
-8. Before push, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push -B main`.
+8. Before push, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push`.
 9. Open PR to `main` for delivery changes (no direct push to `main`).
-10. Before merge, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose merge -B main`.
+10. Before merge, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose merge -B <PR_HEAD_BRANCH> -R <PR_HEAD_OWNER/REPO> --sha <PR_HEAD_FULL_SHA>`.
 11. Merge PRs that pass required checks and review gates with squash strategy only.
 12. Reference issues/internal refs in commits (`Fixes #123`, `Refs #123`, or `Refs TASKS:T1`).
 13. Close issue/internal task only after testing and documentation gates pass, PR merge is complete, and CI/pipeline status is terminal green.

packages/mosaic/framework/templates/agent/projects/python-library/AGENTS.md.template

@@ -9,7 +9,7 @@
 2. Do NOT ask for routine confirmation before required push/merge/issue-close/release/tag actions.
 3. Completion is forbidden at PR-open stage.
 4. Completion requires merged PR to `main` + terminal green CI + linked issue/internal task closed.
-5. Before push or merge, run queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push|merge -B main`.
+5. Before push or merge, run the queue guard against the push branch or the merge PR's exact head repository/SHA (`ci-queue-wait.sh --help`); `pr-merge.sh` supplies exact merge metadata automatically.
 6. For issue/PR/milestone operations, use Mosaic wrappers first (`~/.config/mosaic/tools/git/*.sh`).
 7. If any required wrapper command fails: report `blocked` with the exact failed wrapper command and stop.
 8. Do NOT stop at "PR created" and do NOT ask "should I merge?" for routine flow.
@@ -84,7 +84,7 @@ Reference:
 5. Do not mark implementation complete until PR is merged.
 6. Do not mark implementation complete until CI/pipeline status is terminal green.
 7. Close linked issues/tasks only after merge + green CI.
-8. Before push or merge, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push|merge -B main`.
+8. Before push or merge, run the CI queue guard against the push branch or the merge PR's exact head repository/SHA (`ci-queue-wait.sh --help`); `pr-merge.sh` supplies exact merge metadata automatically.
 
 ## Container Release Strategy (When Applicable)
 

packages/mosaic/framework/templates/agent/projects/python-library/CLAUDE.md.template

@@ -136,9 +136,9 @@ Do NOT stop at "PR created" and do NOT ask "should I merge?" or "should I close
 5. Ensure `docs/PRD.md` or `docs/PRD.json` exists and is current before coding.
 6. Create scratchpad: `docs/scratchpads/{task-id}-{short-name}.md` and include issue/internal ref.
 7. Update `docs/TASKS.md` status + issue/internal ref before coding.
-8. Before push, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push -B main`.
+8. Before push, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push`.
 9. Open PR to `main` for delivery changes (no direct push to `main`).
-10. Before merge, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose merge -B main`.
+10. Before merge, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose merge -B <PR_HEAD_BRANCH> -R <PR_HEAD_OWNER/REPO> --sha <PR_HEAD_FULL_SHA>`.
 11. Merge PRs that pass required checks and review gates with squash strategy only.
 12. Reference issues/internal refs in commits (`Fixes #123`, `Refs #123`, or `Refs TASKS:T1`).
 13. Close issue/internal task only after testing and documentation gates pass, PR merge is complete, and CI/pipeline status is terminal green.

packages/mosaic/framework/templates/agent/projects/typescript/AGENTS.md.template

@@ -9,7 +9,7 @@
 2. Do NOT ask for routine confirmation before required push/merge/issue-close/release/tag actions.
 3. Completion is forbidden at PR-open stage.
 4. Completion requires merged PR to `main` + terminal green CI + linked issue/internal task closed.
-5. Before push or merge, run queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push|merge -B main`.
+5. Before push or merge, run the queue guard against the push branch or the merge PR's exact head repository/SHA (`ci-queue-wait.sh --help`); `pr-merge.sh` supplies exact merge metadata automatically.
 6. For issue/PR/milestone operations, use Mosaic wrappers first (`~/.config/mosaic/tools/git/*.sh`).
 7. If any required wrapper command fails: report `blocked` with the exact failed wrapper command and stop.
 8. Do NOT stop at "PR created" and do NOT ask "should I merge?" for routine flow.
@@ -85,7 +85,7 @@ Reference:
 5. Do not mark implementation complete until PR is merged.
 6. Do not mark implementation complete until CI/pipeline status is terminal green.
 7. Close linked issues/tasks only after merge + green CI.
-8. Before push or merge, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push|merge -B main`.
+8. Before push or merge, run the CI queue guard against the push branch or the merge PR's exact head repository/SHA (`ci-queue-wait.sh --help`); `pr-merge.sh` supplies exact merge metadata automatically.
 
 ## Container Release Strategy (When Applicable)
 

packages/mosaic/framework/templates/agent/projects/typescript/CLAUDE.md.template

@@ -133,9 +133,9 @@ Do NOT stop at "PR created" and do NOT ask "should I merge?" or "should I close
 5. Ensure `docs/PRD.md` or `docs/PRD.json` exists and is current before coding.
 6. Create scratchpad: `docs/scratchpads/{task-id}-{short-name}.md` and include issue/internal ref.
 7. Update `docs/TASKS.md` status + issue/internal ref before coding.
-8. Before push, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push -B main`.
+8. Before push, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push`.
 9. Open PR to `main` for delivery changes (no direct push to `main`).
-10. Before merge, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose merge -B main`.
+10. Before merge, run CI queue guard: `~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose merge -B <PR_HEAD_BRANCH> -R <PR_HEAD_OWNER/REPO> --sha <PR_HEAD_FULL_SHA>`.
 11. Merge PRs that pass required checks and review gates with squash strategy only.
 12. Reference issues/internal refs in commits (`Fixes #123`, `Refs #123`, or `Refs TASKS:T1`).
 13. Close issue/internal task only after testing and documentation gates pass, PR merge is complete, and CI/pipeline status is terminal green.

packages/mosaic/framework/tools/_scripts/mosaic-link-runtime-assets

@@ -68,8 +68,15 @@ copy_claude_settings_guarded() {
     guard_args+=(--allow-inactive-enforcement)
   fi
 
-  if command -v mosaic >/dev/null 2>&1; then
-    if mosaic "${guard_args[@]}"; then
+  local mosaic_cli="${MOSAIC_CLI_PATH:-}"
+  # Unified install passes P3's committed absolute artifact. Standalone
+  # framework installs may resolve PATH once, but still invoke the resulting
+  # absolute path rather than a bare command.
+  if [[ -z "$mosaic_cli" ]]; then
+    mosaic_cli="$(command -v mosaic 2>/dev/null || true)"
+  fi
+  if [[ "$mosaic_cli" == /* && -x "$mosaic_cli" ]]; then
+    if "$mosaic_cli" "${guard_args[@]}"; then
       return 0
     fi
     echo "[mosaic-link] Enforcement hooks were NOT wired into $dst (see message above)." >&2
@@ -77,7 +84,7 @@ copy_claude_settings_guarded() {
     return 0
   fi
 
-  echo "[mosaic-link] ERROR: 'mosaic' CLI not found on PATH — cannot confirm lease-enforcement" >&2
+  echo "[mosaic-link] ERROR: P3 absolute mosaic CLI unavailable — cannot confirm lease-enforcement" >&2
   echo "[mosaic-link] activation capability. enforcement requested but activation half absent —" >&2
   echo "[mosaic-link] needs a published CLI carrying launch-runtime activation + a broker" >&2
   echo "[mosaic-link] supervisor; refusing to wire a dead gate (see #869)." >&2

packages/mosaic/framework/tools/git/ci-queue-wait.sh

@@ -7,7 +7,9 @@ set -euo pipefail
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 source "$SCRIPT_DIR/detect-platform.sh"
 
-BRANCH="main"
+BRANCH=""
+TARGET_REPO=""
+HEAD_SHA=""
 TIMEOUT_SEC=900
 INTERVAL_SEC=15
 PURPOSE="merge"
@@ -15,10 +17,12 @@ REQUIRE_STATUS=0
 
 usage() {
     cat <<EOF
-Usage: $(basename "$0") [-B branch] [-t timeout_sec] [-i interval_sec] [--purpose push|merge] [--require-status]
+Usage: $(basename "$0") [-B branch] [-R owner/repo] [--sha full-40] [-t timeout_sec] [-i interval_sec] [--purpose push|merge] [--require-status]
 
 Options:
-  -B, --branch BRANCH      Branch head to inspect (default: main)
+  -B, --branch BRANCH      Branch head to inspect (default: current branch)
+  -R, --repo OWNER/REPO    Repository containing the branch (default: origin repo)
+      --sha FULL_SHA       Inspect this exact 40-character commit instead of resolving the branch
   -t, --timeout SECONDS    Max wait time in seconds (default: 900)
   -i, --interval SECONDS   Poll interval in seconds (default: 15)
       --purpose VALUE      Log context: push|merge (default: merge)
@@ -27,63 +31,65 @@ Options:
 
 Examples:
   $(basename "$0")
-  $(basename "$0") --purpose push -B main -t 600 -i 10
+  $(basename "$0") --purpose push -t 600 -i 10
 EOF
 }
 
 # get_remote_host and get_gitea_token are provided by detect-platform.sh
 
 get_state_from_status_json() {
-    python3 - <<'PY'
+    # Python source comes from -c so the provider payload remains on stdin.
+    # Never move the payload to argv: commit-status responses can exceed ARG_MAX.
+    python3 -c '
 import json
 import sys
 
 try:
     payload = json.load(sys.stdin)
+    if not isinstance(payload, dict):
+        raise ValueError("status payload is not an object")
 except Exception:
-    print("unknown")
+    print("malformed")
     raise SystemExit(0)
 
-statuses = payload.get("statuses") or []
-state = (payload.get("state") or "").lower()
+raw_statuses = payload.get("statuses", [])
+raw_state = payload.get("state", "")
+if not isinstance(raw_statuses, list) or not isinstance(raw_state, str):
+    print("malformed")
+    raise SystemExit(0)
+statuses = raw_statuses
+state = raw_state.lower()
 
 pending_values = {"pending", "queued", "running", "waiting"}
 failure_values = {"failure", "error", "failed"}
 success_values = {"success"}
 
-if state in pending_values:
-    print("pending")
-    raise SystemExit(0)
-if state in failure_values:
-    print("terminal-failure")
-    raise SystemExit(0)
-if state in success_values:
-    print("terminal-success")
-    raise SystemExit(0)
-
 values = []
 for item in statuses:
     if not isinstance(item, dict):
-        continue
-    value = (item.get("status") or item.get("state") or "").lower()
-    if value:
-        values.append(value)
+        print("malformed")
+        raise SystemExit(0)
+    raw_value = item.get("status") or item.get("state")
+    if not isinstance(raw_value, str) or not raw_value:
+        print("malformed")
+        raise SystemExit(0)
+    values.append(raw_value.lower())
 
-if not values and not state:
-    print("no-status")
-elif any(v in pending_values for v in values):
+if any(value in pending_values for value in values) or state in pending_values:
     print("pending")
-elif any(v in failure_values for v in values):
+elif any(value in failure_values for value in values) or state in failure_values:
     print("terminal-failure")
-elif values and all(v in success_values for v in values):
+elif values and all(value in success_values for value in values) and state in {"", "success"}:
     print("terminal-success")
+elif not values:
+    print("no-status")
 else:
     print("unknown")
-PY
+'
 }
 
 print_pending_contexts() {
-    python3 - <<'PY'
+    python3 -c '
 import json
 import sys
 
@@ -104,17 +110,61 @@ for item in statuses:
     if not isinstance(item, dict):
         continue
     name = item.get("context") or item.get("name") or "unknown-context"
-    value = (item.get("status") or item.get("state") or "unknown").lower()
+    value = str(item.get("status") or item.get("state") or "unknown").lower()
     target = item.get("target_url") or item.get("url") or ""
     if value in pending_values:
         found = True
-        if target:
-            print(f"[ci-queue-wait] pending: {name}={value} ({target})")
-        else:
-            print(f"[ci-queue-wait] pending: {name}={value}")
+        suffix = f" ({target})" if target else ""
+        print(f"[ci-queue-wait] pending: {name}={value}{suffix}")
 if not found:
     print("[ci-queue-wait] no pending contexts")
+'
+}
+
+record_cannot_assert() {
+    local reason="$1"
+    local audit_log="${MOSAIC_CI_QUEUE_AUDIT_LOG:-${XDG_STATE_HOME:-${HOME:-}/.local/state}/mosaic/audit/ci-queue-wait.jsonl}"
+
+    if [[ -z "$audit_log" ]] || ! mkdir -p "$(dirname "$audit_log")"; then
+        echo "Error: CANNOT_ASSERT and audit directory is unavailable; refusing degraded pass." >&2
+        return 70
+    fi
+
+    if ! python3 - "$audit_log" "$reason" "${PLATFORM:-unknown}" "$PURPOSE" "${BRANCH:-unknown}" "${OWNER:-unknown}/${REPO:-unknown}" <<'PY'
+import datetime
+import json
+import os
+import sys
+
+path, reason, platform, purpose, branch, repo = sys.argv[1:]
+record = {
+    "timestamp": datetime.datetime.now(datetime.timezone.utc).isoformat(),
+    "outcome": "CANNOT_ASSERT",
+    "reason": reason,
+    "platform": platform,
+    "purpose": purpose,
+    "disposition": "hold" if purpose == "merge" else "degraded-pass",
+    "branch": branch,
+    "repo": repo,
+}
+fd = os.open(path, os.O_WRONLY | os.O_CREAT | os.O_APPEND, 0o600)
+try:
+    os.write(fd, (json.dumps(record, separators=(",", ":")) + "\n").encode())
+finally:
+    os.close(fd)
 PY
+    then
+        echo "Error: CANNOT_ASSERT and audit write failed at ${audit_log}; refusing degraded pass." >&2
+        return 70
+    fi
+
+    if [[ "$PURPOSE" == "merge" ]]; then
+        echo "[ci-queue-wait] CANNOT_ASSERT reason=${reason} purpose=merge branch=${BRANCH:-unknown}; audited=${audit_log}; HOLD (exit 75). Retry after provider recovery; no manual reset is required." >&2
+        return 75
+    fi
+
+    echo "[ci-queue-wait] CANNOT_ASSERT reason=${reason} purpose=push branch=${BRANCH:-unknown}; audited=${audit_log}; push may proceed in degraded mode." >&2
+    return 0
 }
 
 github_get_branch_head_sha() {
@@ -128,7 +178,87 @@ github_get_commit_status_json() {
     local owner="$1"
     local repo="$2"
     local sha="$3"
-    gh api "repos/${owner}/${repo}/commits/${sha}/status"
+    local work_root status_file checks_file
+    work_root="${AGENT_WORK_ROOT:-${HOME:-}/.cache/mosaic/ci-queue-wait}"
+    mkdir -p "$work_root" || return 1
+    status_file=$(mktemp "$work_root/github-status.XXXXXX") || return 1
+    checks_file=$(mktemp "$work_root/github-checks.XXXXXX") || {
+        rm -f "$status_file"
+        return 1
+    }
+
+    if ! gh api --paginate --slurp "repos/${owner}/${repo}/commits/${sha}/statuses?per_page=100" > "$status_file" ||
+       ! gh api --paginate --slurp "repos/${owner}/${repo}/commits/${sha}/check-runs?per_page=100&filter=latest" > "$checks_file"; then
+        rm -f "$status_file" "$checks_file"
+        return 1
+    fi
+
+    python3 - "$status_file" "$checks_file" <<'PY'
+import json
+import sys
+
+with open(sys.argv[1], encoding="utf-8") as handle:
+    status_pages = json.load(handle)
+with open(sys.argv[2], encoding="utf-8") as handle:
+    check_pages = json.load(handle)
+
+if not isinstance(status_pages, list) or not isinstance(check_pages, list):
+    raise SystemExit(1)
+
+# The statuses endpoint is newest-first and can contain retries for one context.
+# Keep only the newest entry per context after flattening every page.
+combined = []
+seen_contexts = set()
+for page in status_pages:
+    if not isinstance(page, list):
+        raise SystemExit(1)
+    for status in page:
+        if not isinstance(status, dict):
+            raise SystemExit(1)
+        context = status.get("context")
+        if not isinstance(context, str) or not context or context in seen_contexts:
+            continue
+        seen_contexts.add(context)
+        combined.append(status)
+
+check_runs = []
+reported_total = 0
+for page in check_pages:
+    if not isinstance(page, dict):
+        raise SystemExit(1)
+    page_runs = page.get("check_runs") or []
+    total_count = page.get("total_count")
+    if not isinstance(page_runs, list) or not isinstance(total_count, int):
+        raise SystemExit(1)
+    reported_total = max(reported_total, total_count)
+    check_runs.extend(page_runs)
+if len(check_runs) < reported_total:
+    raise SystemExit(1)
+
+for run in check_runs:
+    if not isinstance(run, dict):
+        raise SystemExit(1)
+    status = run.get("status")
+    conclusion = run.get("conclusion")
+    if status != "completed":
+        value = "pending"
+    elif conclusion == "success":
+        value = "success"
+    elif conclusion in {"failure", "cancelled", "timed_out", "action_required", "startup_failure", "stale"}:
+        value = "failure"
+    else:
+        value = "unknown"
+    combined.append({
+        "context": run.get("name") or "github-check",
+        "status": value,
+        "target_url": run.get("html_url") or run.get("details_url") or "",
+    })
+
+json.dump({"state": "", "statuses": combined}, sys.stdout)
+PY
+    local status=$?
+    rm -f "$status_file" "$checks_file"
+    return "$status"
 }
 
 gitea_get_branch_head_sha() {
@@ -174,6 +304,14 @@ while [[ $# -gt 0 ]]; do
             BRANCH="$2"
             shift 2
             ;;
+        -R|--repo)
+            TARGET_REPO="$2"
+            shift 2
+            ;;
+        --sha)
+            HEAD_SHA="$2"
+            shift 2
+            ;;
         -t|--timeout)
             TIMEOUT_SEC="$2"
             shift 2
@@ -206,45 +344,89 @@ if ! [[ "$TIMEOUT_SEC" =~ ^[0-9]+$ ]] || ! [[ "$INTERVAL_SEC" =~ ^[0-9]+$ ]]; th
     echo "Error: timeout and interval must be integer seconds." >&2
     exit 1
 fi
+if [[ -n "$HEAD_SHA" && ! "$HEAD_SHA" =~ ^[0-9a-fA-F]{40}$ ]]; then
+    echo "Error: --sha must be a full 40-character hexadecimal commit SHA." >&2
+    exit 1
+fi
+if [[ -n "$TARGET_REPO" && ! "$TARGET_REPO" =~ ^[^/[:space:]]+/[^/[:space:]]+$ ]]; then
+    echo "Error: --repo must be OWNER/REPO." >&2
+    exit 1
+fi
 
-OWNER=$(get_repo_owner)
-REPO=$(get_repo_name)
-detect_platform > /dev/null
+if [[ "$PURPOSE" != "push" && "$PURPOSE" != "merge" ]]; then
+    echo "Error: --purpose must be push or merge." >&2
+    exit 1
+fi
+
+OWNER="unknown"
+REPO="unknown"
+PLATFORM="unknown"
+if ! OWNER=$(get_repo_owner) || [[ -z "$OWNER" ]]; then
+    record_cannot_assert "repository-owner-unresolvable"
+    exit $?
+fi
+if ! REPO=$(get_repo_name) || [[ -z "$REPO" ]]; then
+    record_cannot_assert "repository-name-unresolvable"
+    exit $?
+fi
+if ! detect_platform > /dev/null; then
+    PLATFORM="${PLATFORM:-unknown}"
+    record_cannot_assert "unsupported-platform"
+    exit $?
+fi
 PLATFORM="${PLATFORM:-unknown}"
 
+if [[ -n "$TARGET_REPO" ]]; then
+    OWNER="${TARGET_REPO%%/*}"
+    REPO="${TARGET_REPO##*/}"
+fi
+
+if [[ -z "$BRANCH" ]]; then
+    if ! BRANCH=$(git symbolic-ref --quiet --short HEAD) || [[ -z "$BRANCH" ]]; then
+        record_cannot_assert "current-branch-unresolvable"
+        exit $?
+    fi
+fi
+
 if [[ "$PLATFORM" == "github" ]]; then
     if ! command -v gh >/dev/null 2>&1; then
-        echo "Error: gh CLI is required for GitHub CI queue guard." >&2
-        exit 1
+        record_cannot_assert "github-cli-unavailable"
+        exit $?
     fi
-    HEAD_SHA=$(github_get_branch_head_sha "$OWNER" "$REPO" "$BRANCH")
     if [[ -z "$HEAD_SHA" ]]; then
-        echo "Error: Could not resolve ${BRANCH} head SHA." >&2
-        exit 1
+        if ! HEAD_SHA=$(github_get_branch_head_sha "$OWNER" "$REPO" "$BRANCH") || [[ -z "$HEAD_SHA" ]]; then
+            record_cannot_assert "branch-head-unavailable"
+            exit $?
+        fi
     fi
     echo "[ci-queue-wait] platform=github purpose=${PURPOSE} branch=${BRANCH} sha=${HEAD_SHA}"
 elif [[ "$PLATFORM" == "gitea" ]]; then
-    HOST=$(get_remote_host) || {
-        echo "Error: Could not determine remote host." >&2
-        exit 1
-    }
-    TOKEN=$(get_gitea_token "$HOST") || {
-        echo "Error: Gitea token not found. Set GITEA_TOKEN or configure ~/.git-credentials." >&2
-        exit 1
-    }
-    HEAD_SHA=$(gitea_get_branch_head_sha "$HOST" "$OWNER/$REPO" "$BRANCH" "$TOKEN")
-    if [[ "$HEAD_SHA" == "__BRANCH_ABSENT__" ]]; then
-        echo "[ci-queue-wait] branch ${BRANCH} not yet on remote — no in-flight pipeline; queue clear."
-        exit 0
+    if ! HOST=$(get_remote_host) || [[ -z "$HOST" ]]; then
+        record_cannot_assert "remote-host-unresolvable"
+        exit $?
+    fi
+    if ! TOKEN=$(get_gitea_token "$HOST") || [[ -z "$TOKEN" ]]; then
+        record_cannot_assert "credential-unresolvable"
+        exit $?
     fi
     if [[ -z "$HEAD_SHA" ]]; then
-        echo "Error: Could not resolve ${BRANCH} head SHA." >&2
-        exit 1
+        if ! HEAD_SHA=$(gitea_get_branch_head_sha "$HOST" "$OWNER/$REPO" "$BRANCH" "$TOKEN"); then
+            record_cannot_assert "branch-head-unavailable"
+            exit $?
+        fi
+        if [[ "$HEAD_SHA" == "__BRANCH_ABSENT__" ]]; then
+            echo "[ci-queue-wait] branch ${BRANCH} not yet on remote — no in-flight pipeline; queue clear."
+            exit 0
+        fi
+        if [[ -z "$HEAD_SHA" ]]; then
+            record_cannot_assert "branch-head-unavailable"
+            exit $?
+        fi
     fi
     echo "[ci-queue-wait] platform=gitea purpose=${PURPOSE} branch=${BRANCH} sha=${HEAD_SHA}"
 else
-    echo "Error: Unsupported platform '${PLATFORM}'." >&2
-    exit 1
+    record_cannot_assert "unsupported-platform"
+    exit $?
 fi
 
 START_TS=$(date +%s)
@@ -253,14 +435,20 @@ DEADLINE_TS=$((START_TS + TIMEOUT_SEC))
 while true; do
     NOW_TS=$(date +%s)
     if (( NOW_TS > DEADLINE_TS )); then
-        echo "Error: Timed out waiting for CI queue to clear on ${BRANCH} after ${TIMEOUT_SEC}s." >&2
+        echo "Error: ASSERTED_NOT_READY state=pending; timed out waiting for CI queue to clear on ${BRANCH} after ${TIMEOUT_SEC}s." >&2
         exit 124
     fi
 
     if [[ "$PLATFORM" == "github" ]]; then
-        STATUS_JSON=$(github_get_commit_status_json "$OWNER" "$REPO" "$HEAD_SHA")
+        if ! STATUS_JSON=$(github_get_commit_status_json "$OWNER" "$REPO" "$HEAD_SHA"); then
+            record_cannot_assert "status-provider-unreachable"
+            exit $?
+        fi
     else
-        STATUS_JSON=$(gitea_get_commit_status_json "$HOST" "$OWNER/$REPO" "$HEAD_SHA" "$TOKEN")
+        if ! STATUS_JSON=$(gitea_get_commit_status_json "$HOST" "$OWNER/$REPO" "$HEAD_SHA" "$TOKEN"); then
+            record_cannot_assert "status-provider-unreachable"
+            exit $?
+        fi
     fi
 
     STATE=$(printf '%s' "$STATUS_JSON" | get_state_from_status_json)
@@ -271,21 +459,24 @@ while true; do
             printf '%s' "$STATUS_JSON" | print_pending_contexts
             sleep "$INTERVAL_SEC"
             ;;
+        terminal-success)
+            exit 0
+            ;;
         no-status)
             if [[ "$REQUIRE_STATUS" -eq 1 ]]; then
-                echo "Error: No CI status contexts found for ${BRANCH} while --require-status is set." >&2
-                exit 1
+                echo "Error: ASSERTED_NOT_READY state=no-status; --require-status was set for ${BRANCH}." >&2
+            else
+                echo "Error: ASSERTED_NOT_READY state=no-status purpose=${PURPOSE} branch=${BRANCH}." >&2
             fi
-            echo "[ci-queue-wait] no status contexts present; proceeding."
-            exit 0
+            exit 3
             ;;
-        terminal-success|terminal-failure|unknown)
-            # Queue guard only blocks on pending/running/queued states.
-            exit 0
+        terminal-failure|malformed|unknown)
+            echo "Error: ASSERTED_NOT_READY state=${STATE} purpose=${PURPOSE} branch=${BRANCH}." >&2
+            exit 3
             ;;
         *)
-            echo "[ci-queue-wait] unrecognized state '${STATE}', proceeding conservatively."
-            exit 0
+            echo "Error: ASSERTED_NOT_READY unrecognized-state=${STATE} purpose=${PURPOSE} branch=${BRANCH}." >&2
+            exit 3
             ;;
     esac
 done

packages/mosaic/framework/tools/git/pr-merge.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 # pr-merge.sh - Merge pull requests on Gitea or GitHub
-# Usage: pr-merge.sh -n PR_NUMBER [-m squash] [-d] [--skip-queue-guard]
+# Usage: pr-merge.sh -n PR_NUMBER [-m squash] [-d]
 
 set -euo pipefail
 
@@ -12,8 +12,8 @@ source "$SCRIPT_DIR/detect-platform.sh"
 PR_NUMBER=""
 MERGE_METHOD="squash"
 DELETE_BRANCH=false
-SKIP_QUEUE_GUARD=false
 DRY_RUN=false
+EXPECT_HEAD=""
 
 usage() {
     cat <<EOF
@@ -25,15 +25,14 @@ Options:
     -n, --number NUMBER     PR number to merge (required)
     -m, --method METHOD     Merge method: squash only (default: squash)
     -d, --delete-branch     Delete the head branch after merge
-        --skip-queue-guard  Skip CI queue guard wait before merge
         --dry-run           Run metadata/login preflight without merging
+        --expect-head SHA   Refuse unless the PR head matches this full commit SHA
     -h, --help              Show this help message
 
 Examples:
     $(basename "$0") -n 42                    # Merge PR #42
     $(basename "$0") -n 42 -m squash          # Squash merge
     $(basename "$0") -n 42 -d                 # Squash merge and delete branch
-    $(basename "$0") -n 42 --skip-queue-guard # Skip queue guard wait
 EOF
     exit "${1:-1}"
 }
@@ -53,15 +52,14 @@ while [[ $# -gt 0 ]]; do
             DELETE_BRANCH=true
             shift
             ;;
-        --skip-queue-guard)
-            SKIP_QUEUE_GUARD=true
-            shift
-            ;;
         --dry-run)
             DRY_RUN=true
-            SKIP_QUEUE_GUARD=true
             shift
             ;;
+        --expect-head)
+            EXPECT_HEAD="$2"
+            shift 2
+            ;;
         -h|--help)
             usage 0
             ;;
@@ -86,18 +84,36 @@ if [[ "$MERGE_METHOD" != "squash" ]]; then
     echo "Error: Mosaic policy enforces squash merge only. Received '$MERGE_METHOD'." >&2
     exit 1
 fi
+if [[ -n "$EXPECT_HEAD" && ! "$EXPECT_HEAD" =~ ^[0-9a-fA-F]{40}$ ]]; then
+    echo "Error: --expect-head must be a full 40-character hexadecimal commit SHA." >&2
+    exit 1
+fi
 
 PR_METADATA="$("$SCRIPT_DIR/pr-metadata.sh" -n "$PR_NUMBER")"
 BASE_BRANCH="$(printf '%s' "$PR_METADATA" | python3 -c 'import json, sys; print((json.load(sys.stdin).get("baseRefName") or "").strip())')"
+HEAD_BRANCH="$(printf '%s' "$PR_METADATA" | python3 -c 'import json, sys; print((json.load(sys.stdin).get("headRefName") or "").strip())')"
+HEAD_SHA="$(printf '%s' "$PR_METADATA" | python3 -c 'import json, sys; print((json.load(sys.stdin).get("headRefOid") or "").strip())')"
+HEAD_REPO="$(printf '%s' "$PR_METADATA" | python3 -c 'import json, sys; value=json.load(sys.stdin).get("headRepository") or ""; print((value.get("nameWithOwner") or value.get("full_name") or "") if isinstance(value, dict) else str(value).strip())')"
 if [[ "$BASE_BRANCH" != "main" ]]; then
     echo "Error: Mosaic policy allows merges only for PRs targeting 'main' (found '$BASE_BRANCH')." >&2
     exit 1
 fi
 
-if [[ "$SKIP_QUEUE_GUARD" != true ]]; then
+if [[ -z "$HEAD_BRANCH" || -z "$HEAD_REPO" || ! "$HEAD_SHA" =~ ^[0-9a-fA-F]{40}$ ]]; then
+    echo "Error: Could not resolve the PR head branch, repository, and full commit SHA for queue inspection." >&2
+    exit 1
+fi
+if [[ -n "$EXPECT_HEAD" && "$HEAD_SHA" != "$EXPECT_HEAD" ]]; then
+    echo "Error: PR head moved: expected $EXPECT_HEAD, found $HEAD_SHA." >&2
+    exit 1
+fi
+
+if [[ "$DRY_RUN" != true ]]; then
     "$SCRIPT_DIR/ci-queue-wait.sh" \
         --purpose merge \
-        -B "$BASE_BRANCH" \
+        -B "$HEAD_BRANCH" \
+        -R "$HEAD_REPO" \
+        --sha "$HEAD_SHA" \
         -t "${MOSAIC_CI_QUEUE_TIMEOUT_SEC:-900}" \
         -i "${MOSAIC_CI_QUEUE_POLL_SEC:-15}"
 fi
@@ -106,31 +122,22 @@ PLATFORM=$(detect_platform)
 OWNER=$(get_repo_owner)
 REPO=$(get_repo_name)
 
-is_known_tea_empty_identity_failure() {
-    local error_file="$1"
-
-    python3 - "$error_file" <<'PY'
-import re
-import sys
-
-with open(sys.argv[1], encoding="utf-8", errors="replace") as handle:
-    error = handle.read()
-
-known_empty_identity = re.search(
-    r"user does not exist.*\[.*uid:\s*0,\s*name:\s*\]",
-    error,
-    flags=re.IGNORECASE | re.DOTALL,
-)
-raise SystemExit(0 if known_empty_identity else 1)
-PY
-}
-
 merge_gitea_with_api() {
     local host="$1" api_url token basic_auth body_file raw_code payload
     api_url="https://${host}/api/v1/repos/${OWNER}/${REPO}/pulls/${PR_NUMBER}/merge"
     mkdir -p "${AGENT_WORK_ROOT:-${HOME:-/tmp}/mosaic/agent-work}"
     body_file=$(mktemp "${AGENT_WORK_ROOT:-${HOME:-/tmp}/mosaic/agent-work}/pr-merge-api-response.XXXXXX")
-    payload='{"Do":"squash"}'
+    payload=$(python3 - "$HEAD_SHA" "$DELETE_BRANCH" <<'PY'
+import json
+import sys
+
+head_sha, delete_branch = sys.argv[1:]
+payload = {"Do": "squash", "head_commit_id": head_sha}
+if delete_branch == "true":
+    payload["delete_branch_after_merge"] = True
+print(json.dumps(payload, separators=(",", ":")))
+PY
+)
 
     token=$(get_gitea_token "$host" || true)
     if [[ -n "$token" ]]; then
@@ -202,7 +209,7 @@ fi
 
 case "$PLATFORM" in
     github)
-        cmd=(gh pr merge "$PR_NUMBER" --squash)
+        cmd=(gh pr merge "$PR_NUMBER" --squash --match-head-commit "$HEAD_SHA")
         [[ "$DELETE_BRANCH" == true ]] && cmd+=(--delete-branch)
         "${cmd[@]}"
         ;;
@@ -211,32 +218,9 @@ case "$PLATFORM" in
             echo "Error: Cannot determine host from origin remote URL" >&2
             exit 1
         }
-        TEA_LOGIN="$(get_gitea_login_for_host "$HOST" || true)"
-
-        if [[ -n "$TEA_LOGIN" ]]; then
-            mkdir -p "${AGENT_WORK_ROOT:-${HOME:-/tmp}/mosaic/agent-work}"
-            TEA_ERROR_FILE=$(mktemp "${AGENT_WORK_ROOT:-${HOME:-/tmp}/mosaic/agent-work}/pr-merge-tea-error.XXXXXX")
-            if tea pr merge "$PR_NUMBER" --style squash --repo "$OWNER/$REPO" --login "$TEA_LOGIN" 2> "$TEA_ERROR_FILE"; then
-                rm -f "$TEA_ERROR_FILE"
-            elif is_known_tea_empty_identity_failure "$TEA_ERROR_FILE"; then
-                cat "$TEA_ERROR_FILE" >&2
-                echo "Known tea empty identity failure detected; using authenticated Gitea API merge fallback." >&2
-                rm -f "$TEA_ERROR_FILE"
-                merge_gitea_with_api "$HOST"
-            else
-                cat "$TEA_ERROR_FILE" >&2
-                rm -f "$TEA_ERROR_FILE"
-                exit 1
-            fi
-        else
-            echo "No tea login configured for $HOST; using authenticated Gitea API merge fallback." >&2
-            merge_gitea_with_api "$HOST"
-        fi
-
-        # Delete branch after merge if requested
-        if [[ "$DELETE_BRANCH" == true ]]; then
-            echo "Note: Branch deletion after merge may need to be done separately with tea" >&2
-        fi
+        # Gitea's API head_commit_id is an atomic compare-and-merge precondition.
+        # tea cannot express it, so exact-head merges use the authenticated API path.
+        merge_gitea_with_api "$HOST"
         ;;
     *)
         echo "Error: Could not detect git platform" >&2

packages/mosaic/framework/tools/git/pr-metadata.sh

@@ -109,7 +109,7 @@ PY
 detect_platform > /dev/null
 
 if [[ "$PLATFORM" == "github" ]]; then
-    METADATA=$(gh pr view "$PR_NUMBER" --json number,title,body,state,author,headRefName,baseRefName,files,labels,assignees,milestone,createdAt,updatedAt,url,isDraft)
+    METADATA=$(gh pr view "$PR_NUMBER" --json number,title,body,state,author,headRefName,headRefOid,headRepository,baseRefName,files,labels,assignees,milestone,createdAt,updatedAt,url,isDraft)
     write_metadata "$METADATA"
 elif [[ "$PLATFORM" == "gitea" ]]; then
     OWNER=$(get_repo_owner)
@@ -182,6 +182,25 @@ if isinstance(head_ref, str) and head_ref.startswith('refs/pull/'):
         data.get('head_ref'),
         head_ref,
     )
+head_sha = first_non_empty(
+    nested(data, 'head', 'sha'),
+    nested(data, 'head', 'id'),
+    data.get('head_sha'),
+)
+head_repo = first_non_empty(
+    nested(data, 'head', 'repo', 'full_name'),
+    nested(data, 'head', 'repo', 'name_with_owner'),
+)
+if not head_repo:
+    head_repo_owner = first_non_empty(
+        nested(data, 'head', 'repo', 'owner', 'login'),
+        nested(data, 'head', 'repo', 'owner', 'username'),
+        nested(data, 'head', 'repo', 'owner_name'),
+    )
+    head_repo_name = first_non_empty(nested(data, 'head', 'repo', 'name'))
+    if head_repo_owner and head_repo_name:
+        head_repo = f'{head_repo_owner}/{head_repo_name}'
+
 base_ref = first_non_empty(
     nested(data, 'base', 'ref'),
     nested(data, 'base', 'name'),
@@ -207,6 +226,8 @@ normalized = {
     'state': data.get('state'),
     'author': nested(data, 'user', 'login') or '',
     'headRefName': head_ref,
+    'headRefOid': head_sha,
+    'headRepository': head_repo,
     'baseRefName': base_ref,
     'labels': [l.get('name', '') for l in data.get('labels', []) if isinstance(l, dict)],
     'assignees': [a.get('login', '') for a in data.get('assignees', []) if isinstance(a, dict)],

packages/mosaic/framework/tools/git/test-ci-queue-wait-branch-absent.sh

@@ -13,7 +13,7 @@
 # Covers:
 #   (a) 404 branch-absent          -> exit 0, "queue clear" message.
 #   (b) 200 existing branch + a terminal CI state -> unchanged behavior.
-#   (c) genuine API error (500)    -> still fail-closed (nonzero exit).
+#   (c) genuine API error (500)    -> loud, audited CANNOT_ASSERT; degraded exit 0.
 
 set -euo pipefail
 
@@ -62,7 +62,7 @@ case "$mode" in
     200)  code=200; body='{"commit":{"id":"deadbeefcafef00d0123456789abcdef01234567"}}' ;;
     500)  code=500; body='{"message":"internal server error"}' ;;
     no-status)         code=200; body='{}' ;;
-    terminal-success)  code=200; body='{"state":"success"}' ;;
+    terminal-success)  code=200; body='{"state":"success","statuses":[{"status":"success"}]}' ;;
     *)
         echo "curl stub: unknown mode=$mode" >&2
         exit 2
@@ -91,6 +91,7 @@ run_ci_queue_wait() {
         export MOSAIC_CREDENTIALS_FILE="$WORK_DIR/no-credentials.json"
         export GITEA_TOKEN="stub-token"
         export GITEA_URL="https://git.example.test"
+        export MOSAIC_CI_QUEUE_AUDIT_LOG="$WORK_DIR/audit/ci-queue-wait.jsonl"
         "$SCRIPT_DIR/ci-queue-wait.sh" -B "$branch" --purpose push -t 5 -i 1
     )
 }
@@ -131,19 +132,26 @@ elif [[ "$out_b" == *"queue clear"* ]]; then
     fail=1
 fi
 
-# (c) genuine API error (500) -> still fail-closed, exit nonzero.
+# (c) genuine API error (500) -> CANNOT_ASSERT is loud and audited, but does not brick delivery.
 set +e
 out_c=$(MOSAIC_STUB_BRANCH_MODE=500 run_ci_queue_wait "feat/some-branch" 2>&1)
 status_c=$?
 set -e
-if [[ "$status_c" -eq 0 ]]; then
-    echo "FAIL(c): expected a nonzero exit for a genuine 500 API error, got 0" >&2
+if [[ "$status_c" -ne 0 ]]; then
+    echo "FAIL(c): expected degraded exit 0 for provider unavailability, got $status_c" >&2
+    echo "$out_c" >&2
+    fail=1
+elif [[ "$out_c" != *"CANNOT_ASSERT"* ]]; then
+    echo "FAIL(c): expected a loud CANNOT_ASSERT diagnostic" >&2
     echo "$out_c" >&2
     fail=1
 elif [[ "$out_c" == *"queue clear"* ]]; then
     echo "FAIL(c): a genuine API error must not be reported as queue-clear" >&2
     echo "$out_c" >&2
     fail=1
+elif [[ ! -s "$WORK_DIR/audit/ci-queue-wait.jsonl" ]]; then
+    echo "FAIL(c): expected a durable CANNOT_ASSERT audit record" >&2
+    fail=1
 fi
 
 if [[ "$fail" -eq 0 ]]; then

packages/mosaic/framework/tools/git/test-ci-queue-wait-github-checks.sh

@@ -0,0 +1,95 @@
+#!/usr/bin/env bash
+# GitHub Actions uses Checks API check-runs, not only legacy commit statuses.
+
+set -u
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+WORK_DIR="${MOSAIC_TEST_WORK_DIR:-$PWD/.mosaic-test-work/ci-queue-wait-github-checks}"
+REPO_DIR="$WORK_DIR/repo"
+STUB_DIR="$WORK_DIR/stubs"
+rm -rf "$WORK_DIR"
+mkdir -p "$REPO_DIR" "$STUB_DIR"
+git -C "$REPO_DIR" init -q
+git -C "$REPO_DIR" checkout -q -b fix/github-checks
+git -C "$REPO_DIR" remote add origin https://github.com/acme/widgets.git
+
+cat > "$STUB_DIR/gh" <<'SH'
+#!/usr/bin/env bash
+set -euo pipefail
+endpoint=""
+for arg in "$@"; do
+    [[ "$arg" == repos/* ]] && endpoint="$arg"
+done
+printf '%s\n' "$*" >> "${MOSAIC_GH_CALL_LOG:?}"
+case "$endpoint" in
+    repos/acme/widgets/branches/fix/github-checks)
+        printf '%s\n' '0123456789abcdef0123456789abcdef01234567'
+        ;;
+    repos/acme/widgets/commits/*/statuses?per_page=100)
+        printf '%s\n' '[[]]'
+        ;;
+    repos/acme/widgets/commits/*/check-runs?per_page=100\&filter=latest)
+        case "${MOSAIC_GH_CHECK_MODE:?}" in
+            success) printf '%s\n' '[{"total_count":1,"check_runs":[{"name":"ci","status":"completed","conclusion":"success"}]}]' ;;
+            pending) printf '%s\n' '[{"total_count":1,"check_runs":[{"name":"ci","status":"in_progress","conclusion":null}]}]' ;;
+            failure) printf '%s\n' '[{"total_count":1,"check_runs":[{"name":"ci","status":"completed","conclusion":"failure"}]}]' ;;
+            late-failure) printf '%s\n' '[{"total_count":2,"check_runs":[{"name":"first-page","status":"completed","conclusion":"success"}]},{"total_count":2,"check_runs":[{"name":"later-page","status":"completed","conclusion":"failure"}]}]' ;;
+            *) exit 2 ;;
+        esac
+        ;;
+    *) echo "unexpected gh endpoint: $endpoint" >&2; exit 2 ;;
+esac
+SH
+chmod +x "$STUB_DIR/gh"
+
+run_guard() {
+    local mode="$1"
+    (
+        cd "$REPO_DIR" || exit
+        export PATH="$STUB_DIR:$PATH"
+        export MOSAIC_GH_CHECK_MODE="$mode"
+        export MOSAIC_GH_CALL_LOG="$WORK_DIR/gh-calls.log"
+        export MOSAIC_CI_QUEUE_AUDIT_LOG="$WORK_DIR/audit.jsonl"
+        "$SCRIPT_DIR/ci-queue-wait.sh" --purpose push -t 0 -i 0
+    )
+}
+
+failures=0
+assert_case() {
+    local mode="$1" expected_rc="$2" expected_state="$3" output rc
+    set +e
+    output=$(run_guard "$mode" 2>&1)
+    rc=$?
+    set -e
+    if [[ "$expected_rc" == zero && "$rc" -ne 0 ]]; then
+        echo "FAIL github-$mode: expected rc=0, got $rc" >&2
+        failures=$((failures + 1))
+    elif [[ "$expected_rc" == nonzero && "$rc" -eq 0 ]]; then
+        echo "FAIL github-$mode: expected rc!=0, got 0" >&2
+        failures=$((failures + 1))
+    fi
+    if [[ "$output" != *"state=$expected_state"* ]]; then
+        echo "FAIL github-$mode: expected state=$expected_state, got:" >&2
+        printf '%s\n' "$output" >&2
+        failures=$((failures + 1))
+    fi
+}
+
+set -e
+: > "$WORK_DIR/gh-calls.log"
+assert_case success zero terminal-success
+assert_case pending nonzero pending
+assert_case failure nonzero terminal-failure
+assert_case late-failure nonzero terminal-failure
+
+if [[ $(grep -c 'check-runs?per_page=100&filter=latest' "$WORK_DIR/gh-calls.log") -lt 4 ]]; then
+    echo "FAIL: expected every case to query all Checks API pages" >&2
+    failures=$((failures + 1))
+fi
+
+if [[ "$failures" -ne 0 ]]; then
+    echo "GitHub check-runs regression failed ($failures assertions)" >&2
+    exit 1
+fi
+
+echo "GitHub check-runs regression passed (4/4 cases, including later-page failure)"

packages/mosaic/framework/tools/git/test-ci-queue-wait-tristate.sh

@@ -0,0 +1,364 @@
+#!/usr/bin/env bash
+# Exit-asserting RM-03 regression harness for ci-queue-wait.sh.
+# Every case is a process-level assertion: a classifier-only green cannot satisfy it.
+
+set -u
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+WORK_DIR="${MOSAIC_TEST_WORK_DIR:-$PWD/.mosaic-test-work/ci-queue-wait-tristate}"
+REPO_DIR="$WORK_DIR/repo"
+STUB_DIR="$WORK_DIR/stubs"
+AUDIT_LOG="$WORK_DIR/audit/ci-queue-wait.jsonl"
+STATUS_OBSERVED="$WORK_DIR/status-observed"
+CLOCK_LOG="$WORK_DIR/clock.log"
+WATCHDOG_PYTHON="/usr/bin/python3"
+WATCHDOG_SCRIPT="$WORK_DIR/real-clock-watchdog.py"
+WATCHDOG_TIMEOUT_SEC=5
+WATCHDOG_EXIT=90
+FEATURE_BRANCH="fix/rm-03-fixture"
+
+if [[ ! -x "$WATCHDOG_PYTHON" ]]; then
+    echo "FAIL setup: required real-clock watchdog runtime is unavailable at $WATCHDOG_PYTHON" >&2
+    exit 1
+fi
+
+rm -rf "$WORK_DIR"
+mkdir -p "$REPO_DIR" "$STUB_DIR"
+cat > "$WATCHDOG_SCRIPT" <<'PY'
+import os
+import signal
+import subprocess
+import sys
+
+if len(sys.argv) < 3:
+    raise SystemExit(2)
+
+timeout_seconds = float(sys.argv[1])
+process = subprocess.Popen(sys.argv[2:], start_new_session=True)
+try:
+    return_code = process.wait(timeout=timeout_seconds)
+except subprocess.TimeoutExpired:
+    try:
+        os.killpg(process.pid, signal.SIGKILL)
+    except ProcessLookupError:
+        pass
+    process.wait()
+    print(
+        f"FAIL HANG watchdog: subject exceeded {timeout_seconds:g}s "
+        "before completing its intended path",
+        file=sys.stderr,
+    )
+    raise SystemExit(90)
+
+if return_code < 0:
+    raise SystemExit(128 - return_code)
+raise SystemExit(return_code)
+PY
+git -C "$REPO_DIR" init -q
+git -C "$REPO_DIR" checkout -q -b "$FEATURE_BRANCH"
+git -C "$REPO_DIR" remote add origin https://git.example.test/acme/widgets.git
+
+cat > "$STUB_DIR/curl" <<'SH'
+#!/usr/bin/env bash
+set -euo pipefail
+
+url=""
+has_write_out=0
+for arg in "$@"; do
+    case "$arg" in
+        -w) has_write_out=1 ;;
+        http://*|https://*) url="$arg" ;;
+    esac
+done
+printf '%s\n' "$url" >> "${MOSAIC_STUB_URL_LOG:?}"
+
+case "$url" in
+    */branches/*)
+        if [[ "${MOSAIC_STUB_BRANCH_MODE:-ok}" == "hang-before-provider" ]]; then
+            while :; do :; done
+        fi
+        if [[ "${MOSAIC_STUB_BRANCH_MODE:-ok}" == "unreachable" ]]; then
+            exit 7
+        fi
+        body='{"commit":{"id":"deadbeefcafef00d0123456789abcdef01234567"}}'
+        if [[ "$has_write_out" -eq 1 ]]; then
+            printf '%s\n200' "$body"
+        else
+            printf '%s' "$body"
+        fi
+        ;;
+    */status)
+        : > "${MOSAIC_STUB_STATUS_OBSERVED:?}"
+        case "${MOSAIC_STUB_STATUS_MODE:?}" in
+            success)   printf '%s' '{"state":"success","statuses":[{"status":"success"}]}' ;;
+            pending)   printf '%s' '{"state":"pending","statuses":[{"status":"pending","context":"ci/test"}]}' ;;
+            failure)   printf '%s' '{"state":"failure","statuses":[{"status":"failure"}]}' ;;
+            no-status) printf '%s' '{"state":"","statuses":[]}' ;;
+            aggregate-success-no-status) printf '%s' '{"state":"success","statuses":[]}' ;;
+            malformed) printf '%s' 'not-json' ;;
+            malformed-statuses-type) printf '%s' '{"state":"success","statuses":"corrupt"}' ;;
+            malformed-status-entry) printf '%s' '{"state":"success","statuses":[null]}' ;;
+            large-success)
+                python3 -c 'import json; print(json.dumps({"state":"success", "statuses":[{"status":"success"}], "padding":"x" * (160 * 1024)}), end="")'
+                ;;
+            unreachable) exit 7 ;;
+            *) echo "unknown status mode" >&2; exit 2 ;;
+        esac
+        ;;
+    *) echo "unexpected curl URL: $url" >&2; exit 2 ;;
+esac
+SH
+
+cat > "$STUB_DIR/date" <<'SH'
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [[ "$#" -ne 1 || "$1" != "+%s" ]]; then
+    echo "unexpected date invocation: $*" >&2
+    exit 2
+fi
+
+if [[ -e "${MOSAIC_STUB_STATUS_OBSERVED:?}" ]]; then
+    printf 'date-phase=after-status\n' >> "${MOSAIC_STUB_CLOCK_LOG:?}"
+    printf '1002\n'
+else
+    printf 'date-phase=before-status\n' >> "${MOSAIC_STUB_CLOCK_LOG:?}"
+    printf '1000\n'
+fi
+SH
+
+cat > "$STUB_DIR/sleep" <<'SH'
+#!/usr/bin/env bash
+set -euo pipefail
+printf 'sleep-after-status=%s\n' "$*" >> "${MOSAIC_STUB_CLOCK_LOG:?}"
+SH
+chmod +x "$STUB_DIR/curl" "$STUB_DIR/date" "$STUB_DIR/sleep"
+
+run_guard() {
+    local status_mode="$1"
+    local audit_log="${2:-$AUDIT_LOG}"
+    shift 2 || true
+    (
+        cd "$REPO_DIR" || exit
+        export PATH="$STUB_DIR:$PATH"
+        export MOSAIC_CREDENTIALS_FILE="$WORK_DIR/no-credentials.json"
+        if [[ "$status_mode" == "credential-unresolvable" ]]; then
+            export HOME="$WORK_DIR/empty-home"
+            mkdir -p "$HOME"
+            unset GITEA_TOKEN GITEA_URL MOSAIC_GIT_IDENTITY
+            export MOSAIC_STUB_STATUS_MODE=success
+        else
+            export GITEA_TOKEN=stub-token
+            export GITEA_URL=https://git.example.test
+            export MOSAIC_STUB_STATUS_MODE="$status_mode"
+        fi
+        rm -f "$STATUS_OBSERVED" "$CLOCK_LOG"
+        export MOSAIC_STUB_URL_LOG="$WORK_DIR/urls.log"
+        export MOSAIC_STUB_STATUS_OBSERVED="$STATUS_OBSERVED"
+        export MOSAIC_STUB_CLOCK_LOG="$CLOCK_LOG"
+        export MOSAIC_CI_QUEUE_AUDIT_LOG="$audit_log"
+        # Provider observation is the synchronization event. The one-second
+        # timeout is subject semantics under virtual time, never a wall wait.
+        # The absolute Python runtime uses an internal monotonic wait and kills
+        # the subject's isolated process group. Neither operation can resolve
+        # to the virtual date/sleep stubs at the front of PATH.
+        local subject_rc
+        if "$WATCHDOG_PYTHON" "$WATCHDOG_SCRIPT" "$WATCHDOG_TIMEOUT_SEC" \
+            "$SCRIPT_DIR/ci-queue-wait.sh" --purpose "${MOSAIC_TEST_PURPOSE:-push}" -t 1 -i 1 "$@"; then
+            subject_rc=0
+        else
+            subject_rc=$?
+        fi
+        return "$subject_rc"
+    )
+}
+
+failures=0
+assert_provider_observed() {
+    local name="$1" require_expiration="${2:-0}"
+    if [[ ! -e "$STATUS_OBSERVED" ]]; then
+        echo "FAIL $name: status provider was not observed" >&2
+        failures=$((failures + 1))
+    fi
+    if [[ ! -s "$CLOCK_LOG" ]] || ! grep -q '^date-phase=before-status$' "$CLOCK_LOG"; then
+        echo "FAIL $name: virtual clock interception did not run before provider observation" >&2
+        failures=$((failures + 1))
+    fi
+    if [[ "$require_expiration" -eq 1 ]]; then
+        if ! grep -q '^sleep-after-status=' "$CLOCK_LOG" || ! grep -q '^date-phase=after-status$' "$CLOCK_LOG"; then
+            echo "FAIL $name: pending path did not expire after provider observation" >&2
+            failures=$((failures + 1))
+        fi
+    fi
+}
+
+run_assertion() {
+    local name="$1" expected_rc="$2" status_mode="$3" required_text="$4"
+    local output rc
+    shift 4
+    set +e
+    output=$(run_guard "$status_mode" "$AUDIT_LOG" "$@" 2>&1)
+    rc=$?
+    set -e
+
+    case "$expected_rc" in
+        zero)
+            if [[ "$rc" -ne 0 ]]; then
+                echo "FAIL $name: expected rc=0, got rc=$rc" >&2
+                failures=$((failures + 1))
+            fi
+            ;;
+        nonzero)
+            if [[ "$rc" -eq 0 ]]; then
+                echo "FAIL $name: expected rc!=0, got rc=0" >&2
+                failures=$((failures + 1))
+            fi
+            ;;
+        not126)
+            if [[ "$rc" -eq 126 ]]; then
+                echo "FAIL $name: payload transport hit ARG_MAX (rc=126)" >&2
+                failures=$((failures + 1))
+            fi
+            ;;
+    esac
+    if [[ "$output" != *"$required_text"* ]]; then
+        echo "FAIL $name: output missing '$required_text' (rc=$rc)" >&2
+        printf '%s\n' "$output" >&2
+        failures=$((failures + 1))
+    fi
+    if [[ "$status_mode" != "credential-unresolvable" ]]; then
+        if [[ "$status_mode" == "pending" ]]; then
+            assert_provider_observed "$name" 1
+        else
+            assert_provider_observed "$name"
+        fi
+    fi
+}
+
+set -e
+: > "$WORK_DIR/urls.log"
+run_assertion success zero success 'state=terminal-success'
+run_assertion pending nonzero pending 'ASSERTED_NOT_READY'
+run_assertion failure nonzero failure 'ASSERTED_NOT_READY'
+run_assertion no-status nonzero no-status 'ASSERTED_NOT_READY'
+run_assertion aggregate-success-no-status nonzero aggregate-success-no-status 'ASSERTED_NOT_READY'
+run_assertion malformed nonzero malformed 'ASSERTED_NOT_READY'
+run_assertion malformed-statuses-type nonzero malformed-statuses-type 'ASSERTED_NOT_READY'
+run_assertion malformed-status-entry nonzero malformed-status-entry 'ASSERTED_NOT_READY'
+run_assertion large-payload not126 large-success 'state=terminal-success'
+run_assertion credential-unresolvable zero credential-unresolvable 'CANNOT_ASSERT'
+run_assertion provider-unreachable zero unreachable 'CANNOT_ASSERT'
+
+# Positive liveness control: a subject mutant hangs before the branch lookup
+# can reach the status provider. Only the independent real-clock watchdog may
+# terminate it, and its failure must be distinct from subject timeout rc=124.
+set +e
+watchdog_output=$(MOSAIC_STUB_BRANCH_MODE=hang-before-provider run_guard success "$AUDIT_LOG" 2>&1)
+watchdog_rc=$?
+set -e
+if [[ "$watchdog_rc" -ne "$WATCHDOG_EXIT" ]]; then
+    echo "FAIL watchdog-control: expected hang-specific rc=$WATCHDOG_EXIT, got rc=$watchdog_rc" >&2
+    failures=$((failures + 1))
+fi
+if [[ "$watchdog_output" != *"FAIL HANG watchdog:"* ]]; then
+    echo "FAIL watchdog-control: expected distinct hang-specific diagnostic" >&2
+    printf '%s\n' "$watchdog_output" >&2
+    failures=$((failures + 1))
+fi
+if [[ -e "$STATUS_OBSERVED" ]]; then
+    echo "FAIL watchdog-control: hanging mutant unexpectedly reached the status provider" >&2
+    failures=$((failures + 1))
+fi
+
+if [[ ! -s "$AUDIT_LOG" ]] || ! grep -q '"outcome":"CANNOT_ASSERT"' "$AUDIT_LOG"; then
+    echo "FAIL provider-unreachable-audit: expected durable CANNOT_ASSERT JSONL record" >&2
+    failures=$((failures + 1))
+fi
+
+# Merge cannot proceed without exact-head evidence. CANNOT_ASSERT is retryable exit 75,
+# distinct from ASSERTED_NOT_READY (3/124), and still writes its audit record.
+merge_audit_lines_before=$(wc -l < "$AUDIT_LOG")
+set +e
+merge_unreachable_output=$(MOSAIC_TEST_PURPOSE=merge run_guard unreachable "$AUDIT_LOG" 2>&1)
+merge_unreachable_rc=$?
+set -e
+if [[ "$merge_unreachable_rc" -ne 75 ]]; then
+    echo "FAIL merge-provider-unreachable: expected rc=75, got rc=$merge_unreachable_rc" >&2
+    failures=$((failures + 1))
+fi
+if [[ "$merge_unreachable_output" != *"CANNOT_ASSERT"* ]]; then
+    echo "FAIL merge-provider-unreachable: expected loud CANNOT_ASSERT diagnostic" >&2
+    failures=$((failures + 1))
+fi
+assert_provider_observed merge-provider-unreachable
+merge_audit_lines_after=$(wc -l < "$AUDIT_LOG")
+if [[ "$merge_audit_lines_after" -le "$merge_audit_lines_before" ]]; then
+    echo "FAIL merge-provider-unreachable: expected an additional audit record" >&2
+    failures=$((failures + 1))
+fi
+
+# A feature-branch push with no -B must inspect the checked-out feature branch.
+if ! grep -q "/branches/$FEATURE_BRANCH" "$WORK_DIR/urls.log"; then
+    echo "FAIL implicit-branch: provider was not queried for $FEATURE_BRANCH" >&2
+    failures=$((failures + 1))
+fi
+
+# Merge callers can pin both a fork repository and the exact reviewed head SHA.
+exact_sha=0123456789abcdef0123456789abcdef01234567
+: > "$WORK_DIR/urls.log"
+run_assertion exact-fork-head zero success 'state=terminal-success' \
+    -B fix/rm-03-fixture -R contributor/widgets-fork --sha "$exact_sha"
+if ! grep -q "/repos/contributor/widgets-fork/commits/$exact_sha/status" "$WORK_DIR/urls.log"; then
+    echo "FAIL exact-fork-head: status URL did not bind fork repository and exact SHA" >&2
+    failures=$((failures + 1))
+fi
+if grep -q '/branches/' "$WORK_DIR/urls.log"; then
+    echo "FAIL exact-fork-head: explicit SHA must not be re-resolved through a branch" >&2
+    failures=$((failures + 1))
+fi
+
+# Platform/repository discovery failures use the same audited CANNOT_ASSERT path.
+audit_lines_before=$(wc -l < "$AUDIT_LOG")
+git -C "$REPO_DIR" remote set-url origin https://gitlab.com/acme/widgets.git
+set +e
+unsupported_output=$(run_guard success "$AUDIT_LOG" 2>&1)
+unsupported_rc=$?
+set -e
+git -C "$REPO_DIR" remote set-url origin https://git.example.test/acme/widgets.git
+if [[ "$unsupported_rc" -ne 0 ]]; then
+    echo "FAIL unsupported-platform: expected degraded rc=0, got rc=$unsupported_rc" >&2
+    failures=$((failures + 1))
+fi
+if [[ "$unsupported_output" != *"CANNOT_ASSERT"* ]]; then
+    echo "FAIL unsupported-platform: expected loud CANNOT_ASSERT diagnostic" >&2
+    failures=$((failures + 1))
+fi
+audit_lines_after=$(wc -l < "$AUDIT_LOG")
+if [[ "$audit_lines_after" -le "$audit_lines_before" ]]; then
+    echo "FAIL unsupported-platform: expected an additional audit record" >&2
+    failures=$((failures + 1))
+fi
+
+# A degraded pass is forbidden if the audit receipt cannot be written.
+mkdir -p "$WORK_DIR/not-a-directory"
+printf 'file' > "$WORK_DIR/not-a-directory/parent"
+set +e
+audit_failure_output=$(run_guard unreachable "$WORK_DIR/not-a-directory/parent/audit.jsonl" 2>&1)
+audit_failure_rc=$?
+set -e
+if [[ "$audit_failure_rc" -eq 0 ]]; then
+    echo "FAIL audit-unavailable: expected rc!=0, got rc=0" >&2
+    failures=$((failures + 1))
+fi
+if [[ "$audit_failure_output" != *"audit"* ]]; then
+    echo "FAIL audit-unavailable: expected loud audit failure diagnostic" >&2
+    failures=$((failures + 1))
+fi
+assert_provider_observed audit-unavailable
+
+if [[ "$failures" -ne 0 ]]; then
+    echo "ci-queue-wait tri-state regression failed ($failures assertions)" >&2
+    exit 1
+fi
+
+echo "ci-queue-wait tri-state regression passed (all outcome classes)"

packages/mosaic/framework/tools/git/test-pr-merge-gitea-empty-uid.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
-# Regression harness for pr-merge.sh Gitea non-interactive tea empty identity fallback.
+# Regression harness for pr-merge.sh Gitea exact-head API path and input safety.
 
 set -euo pipefail
 
@@ -79,15 +79,24 @@ emit_response() {
         printf '200'
     fi
 }
+if [[ "$args" == *"/api/v1/repos/mosaicstack/stack/commits/0123456789abcdef0123456789abcdef01234567/status"* ]]; then
+    emit_response '{"state":"success","statuses":[{"context":"ci/test","status":"success"}]}'
+    exit 0
+fi
 if [[ "$args" == *"/api/v1/repos/mosaicstack/stack/pulls/123"* && "$args" != *"/api/v1/repos/mosaicstack/stack/pulls/123/merge"* ]]; then
-    emit_response '{"number":123,"title":"mock","state":"open","user":{"login":"tester"},"head":{"ref":"feature/mock"},"base":{"ref":"main"},"labels":[],"assignees":[],"html_url":"https://git.mosaicstack.dev/mosaicstack/stack/pulls/123","mergeable":true}'
+    emit_response '{"number":123,"title":"mock","state":"open","user":{"login":"tester"},"head":{"ref":"feature/mock","sha":"0123456789abcdef0123456789abcdef01234567","repo":{"full_name":"mosaicstack/stack"}},"base":{"ref":"main"},"labels":[],"assignees":[],"html_url":"https://git.mosaicstack.dev/mosaicstack/stack/pulls/123","mergeable":true}'
     exit 0
 fi
 if [[ "$args" == *"-X POST"* && "$args" == *"/api/v1/repos/mosaicstack/stack/pulls/123/merge"* ]]; then
-    if [[ "$post_data" != '{"Do":"squash"}' ]]; then
-        echo "unexpected merge payload: $post_data" >&2
-        exit 96
-    fi
+    POST_DATA="$post_data" python3 - <<'PY'
+import json
+import os
+payload = json.loads(os.environ["POST_DATA"])
+assert payload == {
+    "Do": "squash",
+    "head_commit_id": "0123456789abcdef0123456789abcdef01234567",
+}, payload
+PY
     emit_response '{"merged":true,"message":"mock merge complete"}'
     exit 0
 fi
@@ -107,8 +116,8 @@ export GITEA_URL="https://git.mosaicstack.dev"
 export GITEA_TOKEN="redacted-test-token"
 
 OUTPUT="$SANDBOX/output.log"
-if ! "$SCRIPT_DIR/pr-merge.sh" -n 123 -m squash --skip-queue-guard > "$OUTPUT" 2>&1; then
-    echo "Expected pr-merge.sh to recover via Gitea API fallback." >&2
+if ! "$SCRIPT_DIR/pr-merge.sh" -n 123 -m squash > "$OUTPUT" 2>&1; then
+    echo "Expected pr-merge.sh to use the exact-head Gitea API path." >&2
     echo "--- output ---" >&2
     sed 's/redacted-test-token/***REDACTED***/g' "$OUTPUT" >&2
     echo "--- mock log ---" >&2
@@ -127,38 +136,6 @@ if grep -q 'redacted-test-token' "$OUTPUT"; then
     exit 1
 fi
 
-cat > "$MOCK_BIN/tea" <<'EOF'
-#!/bin/bash
-set -euo pipefail
-printf 'tea %q ' "$@" >> "$PR_MERGE_TEST_LOG"
-printf '\n' >> "$PR_MERGE_TEST_LOG"
-if [[ "$*" == *"login list"* ]]; then
-    echo '[{"name":"git.mosaicstack.dev","url":"https://git.mosaicstack.dev"}]'
-    exit 0
-fi
-if [[ "$*" == *"pr merge"* ]]; then
-    echo 'tea network timeout' >&2
-    exit 2
-fi
-exit 0
-EOF
-chmod +x "$MOCK_BIN/tea"
-: > "$LOG_FILE"
-if "$SCRIPT_DIR/pr-merge.sh" -n 123 -m squash --skip-queue-guard > "$OUTPUT" 2>&1; then
-    echo "Expected arbitrary tea failure to remain blocking." >&2
-    exit 1
-fi
-if grep -q '/api/v1/repos/mosaicstack/stack/pulls/123/merge' "$LOG_FILE"; then
-    echo "Arbitrary tea failure unexpectedly used Gitea API merge fallback." >&2
-    sed 's/redacted-test-token/***REDACTED***/g' "$LOG_FILE" >&2
-    exit 1
-fi
-if ! grep -q 'tea network timeout' "$OUTPUT"; then
-    echo "Expected arbitrary tea error to be preserved in output." >&2
-    sed 's/redacted-test-token/***REDACTED***/g' "$OUTPUT" >&2
-    exit 1
-fi
-
 cat > "$MOCK_BIN/tea" <<'EOF'
 #!/bin/bash
 set -euo pipefail
@@ -177,8 +154,8 @@ EOF
 chmod +x "$MOCK_BIN/tea"
 unset GITEA_LOGIN
 : > "$LOG_FILE"
-if ! "$SCRIPT_DIR/pr-merge.sh" -n 123 -m squash --skip-queue-guard > "$OUTPUT" 2>&1; then
-    echo "Expected missing tea login to use authenticated Gitea API fallback." >&2
+if ! "$SCRIPT_DIR/pr-merge.sh" -n 123 -m squash > "$OUTPUT" 2>&1; then
+    echo "Expected the exact-head API path not to depend on a tea login." >&2
     sed 's/redacted-test-token/***REDACTED***/g' "$OUTPUT" >&2
     sed 's/redacted-test-token/***REDACTED***/g' "$LOG_FILE" >&2
     exit 1
@@ -215,7 +192,7 @@ cd "$REPO_DIR"
 git remote set-url origin https://github.com/mosaicstack/stack.git
 : > "$LOG_FILE"
 rm -f "$SENTINEL"
-if "$SCRIPT_DIR/pr-merge.sh" -n "$INJECTION" -m squash --skip-queue-guard > "$OUTPUT" 2>&1; then
+if "$SCRIPT_DIR/pr-merge.sh" -n "$INJECTION" -m squash > "$OUTPUT" 2>&1; then
     echo "Expected GitHub metacharacter PR number to be rejected." >&2
     sed 's/redacted-test-token/***REDACTED***/g' "$OUTPUT" >&2
     exit 1
@@ -240,7 +217,7 @@ git remote set-url origin https://git.mosaicstack.dev/mosaicstack/stack.git
 export GITEA_LOGIN="git.mosaicstack.dev"
 : > "$LOG_FILE"
 rm -f "$SENTINEL"
-if "$SCRIPT_DIR/pr-merge.sh" -n "$INJECTION" -m squash --skip-queue-guard > "$OUTPUT" 2>&1; then
+if "$SCRIPT_DIR/pr-merge.sh" -n "$INJECTION" -m squash > "$OUTPUT" 2>&1; then
     echo "Expected Gitea metacharacter PR number to be rejected." >&2
     sed 's/redacted-test-token/***REDACTED***/g' "$OUTPUT" >&2
     exit 1
@@ -260,4 +237,4 @@ if ! grep -q 'Invalid PR number' "$OUTPUT"; then
     exit 1
 fi
 
-echo "pr-merge.sh Gitea fallback regression passed"
+echo "pr-merge.sh Gitea exact-head API regression passed"

packages/mosaic/framework/tools/git/test-pr-merge-head-pin.sh

@@ -0,0 +1,156 @@
+#!/usr/bin/env bash
+# shellcheck disable=SC2030,SC2031 # Provider arms isolate PATH/credentials in subshells.
+# The commit whose CI was guarded must be the commit the provider atomically merges.
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+WORK_DIR="${MOSAIC_TEST_WORK_DIR:-$PWD/.mosaic-test-work/pr-merge-head-pin}"
+SHA=0123456789abcdef0123456789abcdef01234567
+
+make_fixture() {
+    local name="$1" remote="$2"
+    local root="$WORK_DIR/$name"
+    local tools="$root/tools/git"
+    mkdir -p "$tools" "$root/repo"
+    cp "$SCRIPT_DIR/pr-merge.sh" "$tools/pr-merge.sh"
+    cp "$SCRIPT_DIR/detect-platform.sh" "$tools/detect-platform.sh"
+    git -C "$root/repo" init -q
+    git -C "$root/repo" remote add origin "$remote"
+    cat > "$tools/pr-metadata.sh" <<SH
+#!/usr/bin/env bash
+printf '%s\n' '{"baseRefName":"main","headRefName":"fix/pinned","headRefOid":"$SHA","headRepository":"contributor/widgets-fork"}'
+SH
+    cat > "$tools/ci-queue-wait.sh" <<'SH'
+#!/usr/bin/env bash
+exit 0
+SH
+    chmod +x "$tools"/*.sh
+}
+
+rm -rf "$WORK_DIR"
+make_fixture gitea https://git.example.test/acme/widgets.git
+make_fixture github https://github.com/acme/widgets.git
+
+cat > "$WORK_DIR/gitea/curl" <<'SH'
+#!/usr/bin/env bash
+set -euo pipefail
+payload=""
+for ((i=1; i<=$#; i++)); do
+    if [[ "${!i}" == "-d" ]]; then
+        j=$((i + 1))
+        payload="${!j}"
+    fi
+done
+printf '%s' "$payload" > "${MOSAIC_MERGE_PAYLOAD_LOG:?}"
+printf '200'
+SH
+chmod +x "$WORK_DIR/gitea/curl"
+
+set +e
+(
+    cd "$WORK_DIR/gitea/repo"
+    export PATH="$WORK_DIR/gitea:$PATH"
+    export GITEA_TOKEN=stub-token
+    export GITEA_URL=https://git.example.test
+    export MOSAIC_CREDENTIALS_FILE="$WORK_DIR/no-credentials.json"
+    export MOSAIC_MERGE_PAYLOAD_LOG="$WORK_DIR/gitea-payload.json"
+    env -u MOSAIC_GIT_IDENTITY "$WORK_DIR/gitea/tools/git/pr-merge.sh" -n 123
+) >"$WORK_DIR/gitea.out" 2>&1
+gitea_rc=$?
+set -e
+if [[ "$gitea_rc" -ne 0 ]]; then
+    echo "FAIL gitea-pin: merge fixture returned $gitea_rc" >&2
+    cat "$WORK_DIR/gitea.out" >&2
+    exit 1
+fi
+python3 - "$WORK_DIR/gitea-payload.json" "$SHA" <<'PY'
+import json
+import sys
+payload = json.load(open(sys.argv[1], encoding="utf-8"))
+assert set(payload) <= {"Do", "head_commit_id", "delete_branch_after_merge"}, payload
+assert payload.get("Do") == "squash", payload
+assert payload.get("head_commit_id") == sys.argv[2], payload
+PY
+
+# A merge-gate verdict is commit-bound. A stale expected head must fail before merge.
+wrong_sha=ffffffffffffffffffffffffffffffffffffffff
+rm -f "$WORK_DIR/gitea-payload-stale.json"
+set +e
+(
+    cd "$WORK_DIR/gitea/repo"
+    export PATH="$WORK_DIR/gitea:$PATH"
+    export GITEA_TOKEN=stub-token
+    export GITEA_URL=https://git.example.test
+    export MOSAIC_CREDENTIALS_FILE="$WORK_DIR/no-credentials.json"
+    export MOSAIC_MERGE_PAYLOAD_LOG="$WORK_DIR/gitea-payload-stale.json"
+    env -u MOSAIC_GIT_IDENTITY "$WORK_DIR/gitea/tools/git/pr-merge.sh" -n 123 --expect-head "$wrong_sha"
+) >"$WORK_DIR/gitea-stale.out" 2>&1
+stale_rc=$?
+set -e
+if [[ "$stale_rc" -eq 0 ]] || [[ -e "$WORK_DIR/gitea-payload-stale.json" ]]; then
+    echo "FAIL stale-verdict: moved head was not refused before provider merge" >&2
+    exit 1
+fi
+
+# A merge-capable path cannot bypass the mandatory queue guard. The legacy
+# --skip-queue-guard option must be rejected before any provider merge call.
+cat > "$WORK_DIR/gitea/tools/git/ci-queue-wait.sh" <<'SH'
+#!/usr/bin/env bash
+exit 99
+SH
+chmod +x "$WORK_DIR/gitea/tools/git/ci-queue-wait.sh"
+rm -f "$WORK_DIR/gitea-payload-bypass.json"
+set +e
+(
+    cd "$WORK_DIR/gitea/repo"
+    export PATH="$WORK_DIR/gitea:$PATH"
+    export GITEA_TOKEN=stub-token
+    export GITEA_URL=https://git.example.test
+    export MOSAIC_CREDENTIALS_FILE="$WORK_DIR/no-credentials.json"
+    export MOSAIC_MERGE_PAYLOAD_LOG="$WORK_DIR/gitea-payload-bypass.json"
+    env -u MOSAIC_GIT_IDENTITY "$WORK_DIR/gitea/tools/git/pr-merge.sh" -n 123 --skip-queue-guard
+) >"$WORK_DIR/gitea-bypass.out" 2>&1
+bypass_rc=$?
+set -e
+if [[ "$bypass_rc" -eq 0 ]] || [[ -e "$WORK_DIR/gitea-payload-bypass.json" ]]; then
+    echo "FAIL merge-bypass: --skip-queue-guard reached the provider merge path" >&2
+    exit 1
+fi
+
+# Dry-run is the only path that may omit the guard because it exits before the
+# provider merge dispatch. Prove the exit and absence of a merge payload.
+rm -f "$WORK_DIR/gitea-payload-dry-run.json"
+(
+    cd "$WORK_DIR/gitea/repo"
+    export PATH="$WORK_DIR/gitea:$PATH"
+    export GITEA_TOKEN=stub-token
+    export GITEA_URL=https://git.example.test
+    export MOSAIC_CREDENTIALS_FILE="$WORK_DIR/no-credentials.json"
+    export MOSAIC_MERGE_PAYLOAD_LOG="$WORK_DIR/gitea-payload-dry-run.json"
+    env -u MOSAIC_GIT_IDENTITY "$WORK_DIR/gitea/tools/git/pr-merge.sh" -n 123 --dry-run
+) >"$WORK_DIR/gitea-dry-run.out" 2>&1
+if [[ -e "$WORK_DIR/gitea-payload-dry-run.json" ]]; then
+    echo "FAIL dry-run: non-merging preflight reached the provider merge path" >&2
+    exit 1
+fi
+
+cat > "$WORK_DIR/github/gh" <<'SH'
+#!/usr/bin/env bash
+set -euo pipefail
+printf '%s\n' "$*" > "${MOSAIC_GH_MERGE_LOG:?}"
+SH
+chmod +x "$WORK_DIR/github/gh"
+(
+    cd "$WORK_DIR/github/repo"
+    export PATH="$WORK_DIR/github:$PATH"
+    export MOSAIC_GH_MERGE_LOG="$WORK_DIR/github-call.log"
+    "$WORK_DIR/github/tools/git/pr-merge.sh" -n 123
+) >"$WORK_DIR/github.out" 2>&1
+if ! grep -q -- "--match-head-commit $SHA" "$WORK_DIR/github-call.log"; then
+    echo "FAIL github-pin: merge command omitted --match-head-commit $SHA" >&2
+    cat "$WORK_DIR/github-call.log" >&2
+    exit 1
+fi
+
+echo "PR merge exact-head pin regression passed (Gitea + GitHub)"

packages/mosaic/framework/tools/git/test-pr-merge-queue-branch.sh

@@ -0,0 +1,66 @@
+#!/usr/bin/env bash
+# RM-03: pr-merge must guard the PR head branch, not its main base branch.
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+WORK_DIR="${MOSAIC_TEST_WORK_DIR:-$PWD/.mosaic-test-work/pr-merge-queue-branch}"
+FIXTURE_DIR="$WORK_DIR/tools/git"
+CALL_LOG="$WORK_DIR/queue-call.log"
+
+rm -rf "$WORK_DIR"
+mkdir -p "$FIXTURE_DIR"
+cp "$SCRIPT_DIR/pr-merge.sh" "$FIXTURE_DIR/pr-merge.sh"
+cp "$SCRIPT_DIR/detect-platform.sh" "$FIXTURE_DIR/detect-platform.sh"
+
+cat > "$FIXTURE_DIR/pr-metadata.sh" <<'SH'
+#!/usr/bin/env bash
+printf '%s\n' '{"baseRefName":"main","headRefName":"fix/rm-03-fixture","headRefOid":"0123456789abcdef0123456789abcdef01234567","headRepository":"contributor/widgets-fork"}'
+SH
+
+cat > "$FIXTURE_DIR/ci-queue-wait.sh" <<'SH'
+#!/usr/bin/env bash
+printf '%s\n' "$*" > "${MOSAIC_QUEUE_CALL_LOG:?}"
+exit 42
+SH
+chmod +x "$FIXTURE_DIR"/*.sh
+
+set +e
+(
+    cd "$WORK_DIR"
+    export MOSAIC_QUEUE_CALL_LOG="$CALL_LOG"
+    "$FIXTURE_DIR/pr-merge.sh" -n 123
+) >/dev/null 2>&1
+rc=$?
+set -e
+
+if [[ "$rc" -ne 42 ]]; then
+    echo "FAIL: expected queue stub rc=42 to propagate, got $rc" >&2
+    exit 1
+fi
+if [[ ! -s "$CALL_LOG" ]]; then
+    echo "FAIL: merge wrapper did not invoke the queue guard" >&2
+    exit 1
+fi
+if ! grep -q -- '-B fix/rm-03-fixture' "$CALL_LOG"; then
+    echo "FAIL: merge queue guard did not receive PR head branch" >&2
+    cat "$CALL_LOG" >&2
+    exit 1
+fi
+if grep -q -- '-B main' "$CALL_LOG"; then
+    echo "FAIL: merge queue guard still received the main base branch" >&2
+    cat "$CALL_LOG" >&2
+    exit 1
+fi
+if ! grep -q -- '-R contributor/widgets-fork' "$CALL_LOG"; then
+    echo "FAIL: merge queue guard did not receive the fork head repository" >&2
+    cat "$CALL_LOG" >&2
+    exit 1
+fi
+if ! grep -q -- '--sha 0123456789abcdef0123456789abcdef01234567' "$CALL_LOG"; then
+    echo "FAIL: merge queue guard did not receive the exact PR head SHA" >&2
+    cat "$CALL_LOG" >&2
+    exit 1
+fi
+
+echo "pr-merge queue branch/repository/SHA regression passed"

packages/mosaic/framework/tools/quality/scripts/test-upgrade-rollback.sh

@@ -39,11 +39,12 @@ ORIG_PATH="$PATH"
 # loop — which would make the control a false negative. A root dotfile is
 # operator-owned (unknown→operator), so the sync loop skips it. Clean up on exit.
 STRIPPED="$FW/.install-rollback-control.tmp.sh"
+SIGNALED="$FW/.install-signal-control.tmp.sh"
 NOEXIT="$FW/.install-noexit-control.tmp.sh"
 D1CTRL="$FW/.install-d1guard-control.tmp.sh"
 D2CTRL="$FW/.install-d2guard-control.tmp.sh"
-rm -f "$STRIPPED" "$NOEXIT" "$D1CTRL" "$D2CTRL"
-trap 'rm -f "$STRIPPED" "$NOEXIT" "$D1CTRL" "$D2CTRL"' EXIT
+rm -f "$STRIPPED" "$SIGNALED" "$NOEXIT" "$D1CTRL" "$D2CTRL"
+trap 'rm -f "$STRIPPED" "$SIGNALED" "$NOEXIT" "$D1CTRL" "$D2CTRL"' EXIT
 
 pass=0; fail=0
 chk() { if eval "$2"; then echo "  ✓ $1"; pass=$((pass + 1)); else echo "  ✗ $1"; fail=$((fail + 1)); fi; }
@@ -179,58 +180,107 @@ chk "[control] without -E the mid-sync corruption survives (no rollback)" \
 
 # ── Part C: an INT/TERM interrupt must terminate, not resume (blocker-A) ──────
 # A bash signal trap that merely returns lets the script continue past the
-# interrupt — restoring the snapshot, then resuming the sync and reporting
-# success. We inject a SIGTERM mid-sync with a cp that SUCCEEDS (so set -e never
-# fires and ONLY the signal path governs), and assert the shipped installer
-# restores AND exits without reporting success. The control strips `exit 1` from
-# the trap and shows the buggy resume-to-success.
-make_term_shim() {
-  local dir="$1"
-  cat > "$dir/cp" <<SHIM
-#!/usr/bin/env bash
-dest="\${@: -1}"
-case "\$dest" in
-  */$POISON_REL)
-    kill -TERM "\$PPID" 2>/dev/null   # signal install.sh; the copy still succeeds
-    exec env PATH="$ORIG_PATH" cp "\$@" ;;
-esac
-exec env PATH="$ORIG_PATH" cp "\$@"
-SHIM
-  chmod +x "$dir/cp"
+# interrupt — restoring the snapshot, then resuming the install and reporting
+# success. Generate two installer fixtures that first damage a real target path
+# after the snapshot is armed, then signal their own Bash process immediately
+# before the normal sync. This fixed injection point is independent of `find`
+# enumeration order: after a no-exit handler restores and returns, the complete
+# sync still remains to run, so the historical resume bug is deterministic on
+# every filesystem. Their TERM handlers emit the same observable before
+# diverging, so missing signal delivery fails BOTH arms rather than manufacturing
+# a pass. The only semantic difference between fixtures is the explicit `exit 1`
+# whose load-bearing behavior this control proves.
+TERM_MARKER='[test-control] TERM handler entered'
+HANDLER_WITH_EXIT="trap 'echo \"$TERM_MARKER\" >&2; restore_snapshot; exit 1' TERM  # TEST-TERM-HANDLER"
+HANDLER_WITHOUT_EXIT="trap 'echo \"$TERM_MARKER\" >&2; restore_snapshot' TERM  # TEST-TERM-HANDLER"
+
+make_signal_installer() {
+  local output="$1" handler="$2"
+  local target_trap="trap 'restore_snapshot; exit 1' ERR INT TERM"
+  local target_sync='sync_framework'
+  local inject_damage="printf '%s' '$GARBAGE' > \"\$TARGET_DIR/$POISON_REL\"  # TEST-TERM-DAMAGE"
+  local inject_kill='kill -TERM "$$"  # TEST-TERM-INJECTION'
+
+  if ! awk \
+    -v target_trap="$target_trap" -v target_sync="$target_sync" \
+    -v handler="$handler" -v inject_damage="$inject_damage" \
+    -v inject_kill="$inject_kill" '
+      $0 == target_sync {
+        print inject_damage
+        print inject_kill
+        injection_sites++
+      }
+      { print }
+      $0 == target_trap {
+        print handler
+        handler_sites++
+      }
+      END {
+        if (handler_sites != 1 || injection_sites != 1) exit 42
+      }
+    ' "$INSTALL" > "$output"; then
+    rm -f "$output"
+    fail "Could not construct the self-TERM control installer at the exact trap/copy sites"
+    exit 1
+  fi
+  chmod +x "$output"
 }
 
-# Run one keep-mode upgrade with the SIGTERM shim. Echoes "<exit>\t<out>\t<home>".
+make_signal_installer "$SIGNALED" "$HANDLER_WITH_EXIT"
+make_signal_installer "$NOEXIT" "$HANDLER_WITHOUT_EXIT"
+signal_fixture_ready() {
+  local fixture="$1" expected_handler="$2"
+  [[ "$(grep -cF '# TEST-TERM-DAMAGE' "$fixture")" -eq 1 ]] \
+    && [[ "$(grep -cF '# TEST-TERM-INJECTION' "$fixture")" -eq 1 ]] \
+    && [[ "$(grep -cF '# TEST-TERM-HANDLER' "$fixture")" -eq 1 ]] \
+    && grep -Fqx "$expected_handler" "$fixture"
+}
+signaled_fixture_ready() { signal_fixture_ready "$SIGNALED" "$HANDLER_WITH_EXIT"; }
+noexit_fixture_ready() { signal_fixture_ready "$NOEXIT" "$HANDLER_WITHOUT_EXIT"; }
+chk "[signal] shipped fixture has exactly one self-TERM injection and marked handler" \
+  "signaled_fixture_ready"
+chk "[control] no-exit fixture has exactly one self-TERM injection and marked handler" \
+  "noexit_fixture_ready"
+chk "[control] removing the explicit TERM exit changes the fixture" \
+  "! cmp -s '$SIGNALED' '$NOEXIT'"
+
+# Run one keep-mode upgrade whose own shell delivers SIGTERM synchronously at
+# the selected copy. Echoes "<exit>\t<out>\t<home>".
 run_signal_upgrade() {
-  local installer="$1" H OUT SHIM rc
-  H=$(mktemp -d); OUT=$(mktemp); SHIM=$(mktemp -d)
+  local installer="$1" H OUT rc
+  H=$(mktemp -d); OUT=$(mktemp)
   seed_home "$H"
-  make_term_shim "$SHIM"
   set +e
-  PATH="$SHIM:$ORIG_PATH" \
+  PATH="$ORIG_PATH" \
     MOSAIC_HOME="$H" MOSAIC_INSTALL_MODE=keep MOSAIC_SYNC_ONLY=1 bash "$installer" >"$OUT" 2>&1
   rc=$?
   set -e 2>/dev/null || true
-  rm -rf "$SHIM"
   printf '%s\t%s\t%s\n' "$rc" "$OUT" "$H"
 }
 
-IFS=$'\t' read -r rcC OUTC HC < <(run_signal_upgrade "$INSTALL")
-chk "[signal] SIGTERM mid-sync aborts non-zero (trap exits, does not resume)" \
+IFS=$'\t' read -r rcC OUTC HC < <(run_signal_upgrade "$SIGNALED")
+chk "[signal] TERM handler observable fires exactly once" \
+  "[ \"\$(grep -cF '$TERM_MARKER' '$OUTC')\" -eq 1 ]"
+chk "[signal] SIGTERM after target mutation aborts non-zero (trap exits, does not resume)" \
   "[ '$rcC' -ne 0 ]"
 chk "[signal] restore_snapshot fires on the interrupt" \
   "grep -q 'restoring previous state from snapshot' '$OUTC'"
+chk "[signal] the deliberately damaged target is restored before termination" \
+  "[ \"\$(cat '$HC/$POISON_REL')\" = '$GOOD' ]"
 chk "[signal] does NOT resume to report sync success after the interrupt" \
   "! grep -q 'file phase complete' '$OUTC'"
 
-# Control: strip `exit 1` from the signal trap → the handler returns, the script
-# resumes past the interrupt and wrongly reports success. In $FW so SOURCE_DIR resolves.
-sed "s/trap 'restore_snapshot; exit 1' ERR INT TERM/trap 'restore_snapshot' ERR INT TERM/" \
-  "$INSTALL" > "$NOEXIT"
-chk "[control] the exit-strip actually changed the installer" \
-  "! cmp -s '$INSTALL' '$NOEXIT'"
-IFS=$'\t' read -r _rcD OUTD HD < <(run_signal_upgrade "$NOEXIT")
+IFS=$'\t' read -r rcD OUTD HD < <(run_signal_upgrade "$NOEXIT")
+chk "[control] TERM handler observable fires exactly once" \
+  "[ \"\$(grep -cF '$TERM_MARKER' '$OUTD')\" -eq 1 ]"
+chk "[control] without 'exit 1' the handler restores before returning" \
+  "grep -q 'restoring previous state from snapshot' '$OUTD'"
+chk "[control] without 'exit 1' the installer exits zero after resuming" \
+  "[ '$rcD' -eq 0 ]"
 chk "[control] without 'exit 1' the trap resumes and reports sync success (the bug)" \
   "grep -q 'file phase complete' '$OUTD'"
+chk "[control] the resumed full sync mutates the restored target again" \
+  "! grep -qxF '$GOOD' '$HD/$POISON_REL' && cmp -s '$FW/$POISON_REL' '$HD/$POISON_REL'"
 
 # ── Part D: a failed source/prune `find` scan must abort + roll back (D1) ─────
 # A `< <(find …)` process substitution discards find's exit status, so an
@@ -309,10 +359,10 @@ chk "[control] without the D2 recovery line the operator gets no snapshot pointe
 # Reap any snapshot the reset-fail runs left in /tmp (reset failed → never cleaned).
 grep -o '/[^ ]*mosaic-snapshot[^ ]*' "$OUTH" 2>/dev/null | head -1 | while read -r s; do rm -rf "$s"; done
 
-# Cleanup ($STRIPPED / $NOEXIT / $D1CTRL / $D2CTRL are also removed by the EXIT trap).
+# Cleanup (generated installer controls are also removed by the EXIT trap).
 for d in "$HA" "$REFA" "$HB" "$REFB" "$HC" "$HD" "$HE" "$REFE" "$HF" "$REFF" "$HG" "$HH"; do rm -rf "$d"; done
 rm -f "$OUTA" "$OUTB" "$OUTC" "$OUTD" "$OUTE" "$OUTF" "$OUTG" "$OUTH" \
-  "$STRIPPED" "$NOEXIT" "$D1CTRL" "$D2CTRL"
+  "$STRIPPED" "$SIGNALED" "$NOEXIT" "$D1CTRL" "$D2CTRL"
 
 echo
 echo "RESULT: $pass passed, $fail failed"

packages/mosaic/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@mosaicstack/mosaic",
-  "version": "0.0.48",
+  "version": "0.0.49",
   "repository": {
     "type": "git",
     "url": "https://git.mosaicstack.dev/mosaicstack/stack.git",
@@ -25,7 +25,7 @@
     "lint": "eslint src",
     "typecheck": "tsc --noEmit",
     "test": "vitest run --passWithNoTests && pnpm run test:framework-shell",
-    "test:framework-shell": "bash framework/tools/quality/scripts/check-test-enumeration.sh && bash framework/tools/quality/scripts/test-check-test-enumeration.sh && python3 src/lease-broker/daemon_deadline_unittest.py && python3 src/lease-broker/normative_fragments_unittest.py && python3 src/lease-broker/receipt_challenge_unittest.py && python3 src/lease-broker/context_recovery_unittest.py && python3 src/lease-broker/recovery_runtime_unittest.py && python3 src/lease-broker/recovery_b1_adversarial_unittest.py && python3 src/lease-broker/framework_skill_portability_unittest.py && python3 src/mutator-gate/runtime_tools_unittest.py && python3 src/mutator-gate/runtime_launch_guard_unittest.py && python3 src/mutator-gate/version_coupling_unittest.py && python3 framework/tools/lease-broker/check-runtime-launches.py --root ../.. && bash framework/tools/codex/test-pr-diff-context.sh && bash framework/tools/qa/test-deps-preflight.sh && bash framework/tools/git/test-pr-review-gitea-comment.sh && bash framework/tools/git/test-pr-review-repo-host-override.sh && bash framework/tools/git/test-ci-queue-wait-branch-absent.sh && bash framework/tools/git/test-git-credential-mosaic.sh && bash framework/tools/git/test-gitea-token-identity.sh && bash framework/tools/woodpecker/test-terminal-green-contract.sh && bash framework/tools/_scripts/test-install-ordering-guard.sh && bash framework/tools/tmux/agent-send.test.sh && bash framework/tools/wake/test-wake-store-ack.sh && bash framework/tools/wake/test-wake-store-enqueue-race.sh && bash framework/tools/wake/test-wake-digest-hmac.sh && bash framework/tools/wake/test-wake-digest-quarantine.sh && bash framework/tools/wake/test-wake-detector.sh && bash framework/tools/wake/test-wake-fn-oracle.sh && bash framework/tools/wake/test-wake-reconcile.sh && bash framework/tools/wake/test-wake-beacon.sh && bash framework/tools/wake/test-wake-preimage.sh && bash framework/tools/wake/test-wake-install.sh"
+    "test:framework-shell": "bash framework/tools/quality/scripts/check-test-enumeration.sh && bash framework/tools/quality/scripts/test-check-test-enumeration.sh && python3 src/lease-broker/daemon_deadline_unittest.py && python3 src/lease-broker/normative_fragments_unittest.py && python3 src/lease-broker/receipt_challenge_unittest.py && python3 src/lease-broker/context_recovery_unittest.py && python3 src/lease-broker/recovery_runtime_unittest.py && python3 src/lease-broker/recovery_b1_adversarial_unittest.py && python3 src/lease-broker/framework_skill_portability_unittest.py && python3 src/mutator-gate/runtime_tools_unittest.py && python3 src/mutator-gate/runtime_launch_guard_unittest.py && python3 src/mutator-gate/version_coupling_unittest.py && python3 framework/tools/lease-broker/check-runtime-launches.py --root ../.. && bash framework/tools/codex/test-pr-diff-context.sh && bash framework/tools/qa/test-deps-preflight.sh && bash framework/tools/git/test-pr-review-gitea-comment.sh && bash framework/tools/git/test-pr-review-repo-host-override.sh && bash framework/tools/git/test-ci-queue-wait-branch-absent.sh && bash framework/tools/git/test-ci-queue-wait-tristate.sh && bash framework/tools/git/test-ci-queue-wait-github-checks.sh && bash framework/tools/git/test-pr-merge-queue-branch.sh && bash framework/tools/git/test-pr-merge-head-pin.sh && bash framework/tools/git/test-git-credential-mosaic.sh && bash framework/tools/git/test-gitea-token-identity.sh && bash framework/tools/woodpecker/test-terminal-green-contract.sh && bash framework/tools/_scripts/test-install-ordering-guard.sh && bash framework/tools/tmux/agent-send.test.sh && bash framework/tools/wake/test-wake-store-ack.sh && bash framework/tools/wake/test-wake-store-enqueue-race.sh && bash framework/tools/wake/test-wake-digest-hmac.sh && bash framework/tools/wake/test-wake-digest-quarantine.sh && bash framework/tools/wake/test-wake-detector.sh && bash framework/tools/wake/test-wake-fn-oracle.sh && bash framework/tools/wake/test-wake-reconcile.sh && bash framework/tools/wake/test-wake-beacon.sh && bash framework/tools/wake/test-wake-preimage.sh && bash framework/tools/wake/test-wake-install.sh"
   },
   "dependencies": {
     "@mosaicstack/brain": "workspace:*",

tools/e2e-install-test.sh

@@ -1,184 +1,408 @@
 #!/usr/bin/env bash
-# ─── Mosaic Stack — End-to-End Install Test ────────────────────────────────────
+# Greenfield installer acceptance fixture.
 #
-# Runs a clean-container install test to verify the full first-run flow:
-#   tools/install.sh  ->  mosaic wizard (non-interactive)
-#                     ->  mosaic gateway install
-#                     ->  mosaic gateway verify
-#
-# Usage:
-#   bash tools/e2e-install-test.sh
-#
-# Requirements:
-#   - Docker (skips gracefully if not available)
-#   - Run from the repository root
-#
-# How it works:
-#   1. Mounts the repository into a node:22-alpine container.
-#   2. Installs prerequisites (bash, curl, jq, git) inside the container.
-#   3. Runs `bash tools/install.sh --yes --no-auto-launch` to install the
-#      framework and CLI from the Gitea registry.
-#   4. Runs `mosaic wizard --non-interactive` to set up SOUL/USER.
-#   5. Runs `mosaic gateway install` with piped defaults (non-interactive).
-#   6. Runs `mosaic gateway verify` and checks its exit code.
-#      NOTE: `mosaic gateway verify` is a new command added in the
-#      feat/mosaic-first-run-ux branch. If the installed CLI version
-#      pre-dates this branch (does not have `gateway verify`), the test
-#      marks this step as EXPECTED-SKIP and reports the installed version.
-#   7. Reports PASS or FAIL with a summary.
-#
-# To run manually:
-#   cd /path/to/mosaic-stack
-#   bash tools/e2e-install-test.sh
-#
-# ──────────────────────────────────────────────────────────────────────────────
+# The fixture itself is intentionally RED until the C2-C5 phase owners repair
+# their postconditions. C1's CI gate executes it and validates that the RED is
+# attributable (including the discriminating P3 PASS); it does not turn the
+# failed install into a false green.
 
 set -euo pipefail
 
-REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
-IMAGE="node:22-alpine"
-CONTAINER_NAME="mosaic-e2e-install-$$"
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+LANE="${MOSAIC_INSTALL_LANE:-next}"
+SOURCE="${MOSAIC_INSTALL_SOURCE:-checkout}"
+IMAGE="${MOSAIC_INSTALL_IMAGE:-node:22-bookworm-slim}"
+GIT_MODE="${MOSAIC_INSTALL_GIT_MODE:-present}"
+INSTALLER_FILE="${MOSAIC_FIXTURE_INSTALLER_FILE:-$ROOT/tools/install.sh}"
+INSTALLER_URL="${MOSAIC_FIXTURE_INSTALLER_URL:-}"
+INSTALLER_SHA256="${MOSAIC_FIXTURE_INSTALLER_SHA256:-}"
+IN_CLEAN_CONTAINER="${MOSAIC_GREENFIELD_CONTAINER:-0}"
 
-# ─── Colour helpers ───────────────────────────────────────────────────────────
-if [[ -t 1 ]]; then
-  R=$'\033[0;31m' G=$'\033[0;32m' Y=$'\033[0;33m' BOLD=$'\033[1m' RESET=$'\033[0m'
-else
-  R="" G="" Y="" BOLD="" RESET=""
-fi
+usage() {
+  cat <<'EOF'
+Usage: tools/e2e-install-test.sh [--lane next|main] [--source checkout|remote] [--git present|absent]
 
-info()  { echo "${BOLD}[e2e]${RESET} $*"; }
-ok()    { echo "${G}[PASS]${RESET} $*"; }
-fail()  { echo "${R}[FAIL]${RESET} $*" >&2; }
-warn()  { echo "${Y}[WARN]${RESET} $*"; }
-
-# ─── Docker availability check ────────────────────────────────────────────────
-if ! command -v docker &>/dev/null; then
-  warn "Docker not found — skipping e2e install test."
-  warn "Install Docker and re-run this script to exercise the full install flow."
-  exit 0
-fi
-
-if ! docker info &>/dev/null 2>&1; then
-  warn "Docker daemon is not running or not accessible — skipping e2e install test."
-  exit 0
-fi
-
-info "Docker available — proceeding with e2e install test."
-info "Repo root: ${REPO_ROOT}"
-info "Container image: ${IMAGE}"
-
-# ─── Inline script that runs INSIDE the container ────────────────────────────
-INNER_SCRIPT="$(mktemp /tmp/mosaic-e2e-inner-XXXXXX.sh)"
-trap 'rm -f "$INNER_SCRIPT"' EXIT
-
-cat > "$INNER_SCRIPT" <<'INNER_SCRIPT_EOF'
-#!/bin/sh
-# Bootstrap: /bin/sh until bash is installed, then re-exec.
-set -e
-
-echo "=== [inner] Installing system prerequisites ==="
-apk add --no-cache bash curl jq git 2>/dev/null || \
-  apt-get install -y -q bash curl jq git 2>/dev/null || true
-
-# Re-exec under bash.
-if [ -z "${BASH_VERSION:-}" ] && command -v bash >/dev/null 2>&1; then
-  exec bash "$0" "$@"
-fi
-
-# ── bash from here ────────────────────────────────────────────────────────────
-set -euo pipefail
-
-echo "=== [inner] Node.js / npm versions ==="
-node --version
-npm --version
-
-echo "=== [inner] Setting up npm global prefix ==="
-export NPM_PREFIX="/root/.npm-global"
-mkdir -p "$NPM_PREFIX/bin"
-npm config set prefix "$NPM_PREFIX" 2>/dev/null || true
-export PATH="$NPM_PREFIX/bin:$PATH"
-
-echo "=== [inner] Running install.sh --yes --no-auto-launch ==="
-# Install both framework and CLI from the Gitea registry.
-MOSAIC_SKIP_SKILLS_SYNC=1 \
-MOSAIC_ASSUME_YES=1 \
-  bash /repo/tools/install.sh --yes --no-auto-launch
-
-INSTALLED_VERSION="$(mosaic --version 2>/dev/null || echo 'unknown')"
-echo "[inner] mosaic CLI installed: ${INSTALLED_VERSION}"
-
-echo "=== [inner] Running mosaic wizard (non-interactive) ==="
-mosaic wizard \
-  --non-interactive \
-  --name "test-agent" \
-  --user-name "tester" \
-  --pronouns "they/them" \
-  --timezone "UTC" || {
-  echo "[WARN] mosaic wizard exited non-zero — continuing"
+Runs the documented installer command from zero in Debian/glibc as a non-root
+uid with an isolated HOME. The fixture exits non-zero when any P0-P8
+postcondition fails. `next` is always selected with the --next installer flag.
+EOF
 }
 
-echo "=== [inner] Running mosaic gateway install ==="
-# Feed non-interactive answers:
-#   "1"   → storage tier: local
-#   ""    → port: accept default (14242)
-#   ""    → ANTHROPIC_API_KEY: skip
-#   ""    → CORS origin: accept default
-#   Then admin bootstrap: name, email, password
-printf '1\n\n\n\nTest Admin\[email protected]\ntestpassword123\n' \
-  | mosaic gateway install
-INSTALL_EXIT="$?"
-if [ "${INSTALL_EXIT}" -ne 0 ]; then
-  echo "[ERR] mosaic gateway install exited ${INSTALL_EXIT}"
-  mosaic gateway status 2>/dev/null || true
-  exit "${INSTALL_EXIT}"
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --lane) LANE="${2:-}"; shift 2 ;;
+    --source) SOURCE="${2:-}"; shift 2 ;;
+    --git) GIT_MODE="${2:-}"; shift 2 ;;
+    -h|--help) usage; exit 0 ;;
+    *) echo "[fixture] unknown argument: $1" >&2; usage >&2; exit 2 ;;
+  esac
+done
+
+case "$LANE" in next|main) ;; *) echo "[fixture] unsupported lane '$LANE' (expected next|main)" >&2; exit 2 ;; esac
+case "$SOURCE" in checkout|remote) ;; *) echo "[fixture] unsupported source '$SOURCE' (expected checkout|remote)" >&2; exit 2 ;; esac
+case "$GIT_MODE" in present|absent) ;; *) echo "[fixture] unsupported git mode '$GIT_MODE' (expected present|absent)" >&2; exit 2 ;; esac
+if [[ "$SOURCE" == remote ]]; then
+  [[ -n "$INSTALLER_URL" ]] || INSTALLER_URL="https://git.mosaicstack.dev/mosaicstack/stack/raw/branch/${LANE}/tools/install.sh"
+  [[ "$INSTALLER_SHA256" =~ ^[0-9a-f]{64}$ ]] \
+    || { echo '[fixture] remote source requires MOSAIC_FIXTURE_INSTALLER_SHA256=64hex' >&2; exit 2; }
 fi
 
-echo "=== [inner] Running mosaic gateway verify ==="
-# `gateway verify` was added in feat/mosaic-first-run-ux.
-# If the installed version pre-dates this, skip gracefully.
-if ! mosaic gateway --help 2>&1 | grep -q 'verify'; then
-  echo "[SKIP] 'mosaic gateway verify' not available in installed version ${INSTALLED_VERSION}."
-  echo "[SKIP] This command was added in the feat/mosaic-first-run-ux release."
-  echo "[SKIP] Re-run after the new version is published to validate this step."
-  # Treat as pass — the install flow itself worked.
-  exit 0
+if [[ "$IN_CLEAN_CONTAINER" != "1" ]]; then
+  if ! command -v docker >/dev/null 2>&1; then
+    echo "[fixture] FAIL: Docker is required; greenfield validation was NOT RUN." >&2
+    exit 2
+  fi
+  if ! docker info >/dev/null 2>&1; then
+    echo "[fixture] FAIL: Docker daemon is unavailable; greenfield validation was NOT RUN." >&2
+    exit 2
+  fi
 fi
 
-mosaic gateway verify
-VERIFY_EXIT="$?"
-echo "=== [inner] verify exit code: ${VERIFY_EXIT} ==="
-exit "${VERIFY_EXIT}"
-INNER_SCRIPT_EOF
+installer_b64=""
+framework_payload_count="NOT-MEASURED"
+repo_root_count="NOT-MEASURED"
+checkout_archive=""
+checkout_digest=""
+checkout_content_id=""
+if [[ "$SOURCE" == "checkout" ]]; then
+  installer_b64="$(base64 -w0 "$INSTALLER_FILE")"
+  [[ -d "$ROOT/packages/mosaic/framework/skills" ]] \
+    && framework_payload_count="$(find "$ROOT/packages/mosaic/framework/skills" -mindepth 1 -maxdepth 1 -type d | wc -l | tr -d ' ')"
+  [[ -d "$ROOT/skills" ]] \
+    && repo_root_count="$(find "$ROOT/skills" -mindepth 1 -maxdepth 1 -type d | wc -l | tr -d ' ')"
+  checkout_archive="$(mktemp "${TMPDIR:-/tmp}/mosaic-greenfield-checkout.XXXXXX")"
+  repo_parent="$(dirname "$ROOT")"
+  repo_name="$(basename "$ROOT")"
+  tar -C "$repo_parent" \
+    --exclude='*/.git' --exclude='*/node_modules' --exclude='*/dist' \
+    --exclude='*/coverage' --exclude='*/.turbo' --exclude='*/.mosaic-test-work' \
+    --exclude='*/.env' --exclude='*/.env.*' \
+    -czf "$checkout_archive" "$repo_name"
+  checkout_digest="$(sha256sum "$checkout_archive" | awk '{print $1}')"
+  checkout_content_id="${checkout_digest:0:40}"
+fi
 
-chmod +x "$INNER_SCRIPT"
+inner="$(mktemp "${TMPDIR:-/tmp}/mosaic-greenfield-inner.XXXXXX")"
+trap 'rm -f "$inner" "$checkout_archive"' EXIT
+cat > "$inner" <<'INNER'
+#!/usr/bin/env bash
+set -euo pipefail
 
-# ─── Pull image ───────────────────────────────────────────────────────────────
-info "Pulling ${IMAGE}…"
-docker pull "${IMAGE}" --quiet
+export DEBIAN_FRONTEND=noninteractive
+apt-get update -qq
+packages=(bash ca-certificates curl jq passwd python3 util-linux)
+[[ "$FIXTURE_GIT_MODE" == "present" ]] && packages+=(git)
+apt-get install -y -qq "${packages[@]}" >/dev/null
 
-# ─── Run container ────────────────────────────────────────────────────────────
-info "Starting container ${CONTAINER_NAME}…"
+if [[ "$FIXTURE_SOURCE" == "checkout" ]]; then
+  awk 'found { print } /^__MOSAIC_CHECKOUT_ARCHIVE__$/ { found=1; next }' "$0" | base64 -d > /tmp/source-checkout.tar.gz
+  actual_checkout_digest="$(sha256sum /tmp/source-checkout.tar.gz | awk '{print $1}')"
+  if [[ "$actual_checkout_digest" != "$FIXTURE_CHECKOUT_SHA256" ]]; then
+    echo "[fixture] checkout archive transport digest mismatch" >&2
+    exit 1
+  fi
+fi
 
-EXIT_CODE=0
-docker run --rm \
-  --name "${CONTAINER_NAME}" \
-  --volume "${REPO_ROOT}:/repo:ro" \
-  --volume "${INNER_SCRIPT}:/e2e-inner.sh:ro" \
-  --network host \
-  "${IMAGE}" \
-  /bin/sh /e2e-inner.sh \
-  || EXIT_CODE=$?
+useradd --create-home --uid 1001 --shell /bin/bash mosaic
+install -d -o mosaic -g mosaic /home/mosaic/work
 
-# ─── Report ───────────────────────────────────────────────────────────────────
-echo ""
-if [[ "$EXIT_CODE" -eq 0 ]]; then
-  ok "End-to-end install test PASSED (exit ${EXIT_CODE})"
+case "$FIXTURE_SOURCE" in
+  checkout)
+    printf '%s' "$FIXTURE_INSTALLER_B64" | base64 -d > /tmp/install.sh
+    ;;
+  remote)
+    curl -fsSL "$FIXTURE_INSTALLER_URL" -o /tmp/install.sh
+    [[ -s /tmp/install.sh ]] || { echo '[fixture] remote installer returned an empty HTTP-success body' >&2; exit 1; }
+    actual_installer_sha256="$(sha256sum /tmp/install.sh | awk '{print $1}')"
+    [[ "$actual_installer_sha256" == "$FIXTURE_INSTALLER_SHA256" ]] || {
+      echo "[fixture] remote installer digest mismatch got=$actual_installer_sha256 expected=$FIXTURE_INSTALLER_SHA256" >&2
+      exit 1
+    }
+    ;;
+esac
+chmod 0755 /tmp/install.sh
+sha256sum /tmp/install.sh | sed 's/^/[fixture] installer sha256: /'
+
+cat > /tmp/run-as-target.sh <<'TARGET'
+#!/usr/bin/env bash
+set -uo pipefail
+
+lane="$FIXTURE_LANE"
+home="$HOME"
+prefix="$home/.npm-global"
+mosaic_home="$home/.config/mosaic"
+install_log="$home/install.log"
+failures=0
+
+phase_pass() { printf '[%s] PASS: %s\n' "$1" "$2"; }
+phase_fail() { printf '[%s] FAIL: %s\n' "$1" "$2"; failures=$((failures + 1)); }
+
+lane_args=()
+resolved_spec='@mosaicstack/mosaic'
+if [[ "$lane" == "next" ]]; then
+  lane_args+=(--next)
+  resolved_spec='@mosaicstack/mosaic@next'
+fi
+
+resolved_version="$(npm view "$resolved_spec" version --registry=https://git.mosaicstack.dev/api/packages/mosaicstack/npm/ 2>/dev/null || true)"
+printf '[fixture] resolved lane=%s package=%s version=%s\n' "$lane" "$resolved_spec" "${resolved_version:-UNRESOLVED}"
+
+secret_canary='MOSAIC_C1_CANARY_6f3c91e2'
+argv_capture=/tmp/mosaic-installer-argv.log
+: > "$argv_capture"
+set +e
+MOSAIC_NO_COLOR=1 MOSAIC_ASSUME_YES=1 MOSAIC_INSTALL_SECRET_CANARY="$secret_canary" \
+  MOSAIC_INSTALL_REDACTION_PROBE=1 \
+  bash /tmp/install.sh "${lane_args[@]}" --yes --no-auto-launch >"$install_log" 2>&1 &
+installer_pid=$!
+while kill -0 "$installer_pid" 2>/dev/null; do
+  for cmdline in /proc/[0-9]*/cmdline; do
+    [[ -r "$cmdline" ]] || continue
+    tr '\0' ' ' < "$cmdline" >> "$argv_capture" 2>/dev/null || true
+    printf '\n' >> "$argv_capture"
+  done
+  sleep 0.02
+done
+wait "$installer_pid"
+install_status=$?
+set -e
+cat "$install_log"
+probe_ok=true
+if [[ "$FIXTURE_GIT_MODE" == present ]] \
+  && ! grep -q '^\[REDACTION-PROBE\] emitted=\[REDACTED\]$' "$install_log"; then
+  probe_ok=false
+fi
+if [[ "$probe_ok" != true ]] \
+  || grep -F "$secret_canary" "$argv_capture" >/dev/null \
+  || grep -R -F "$secret_canary" "$home" >/dev/null 2>&1; then
+  phase_fail P0 'seeded credential probe missing or canary leaked to argv, output, command log, npmrc, generated files, or shell history'
 else
-  fail "End-to-end install test FAILED (exit ${EXIT_CODE})"
-  echo ""
-  echo "  Troubleshooting:"
-  echo "    - Review the output above for the failing step."
-  echo "    - Re-run with bash -x tools/e2e-install-test.sh for verbose trace."
-  echo "    - Run mosaic gateway logs inside a manual container for daemon output."
+  printf '[SECRET-CONTROL] PASS: seeded captured-command canary was redacted and absent from argv/output/commands.log/npmrc/generated/history populations\n'
+fi
+printf '[fixture] installer_exit=%d done_claims=%s\n' \
+  "$install_status" "$(grep -cF 'Done.' "$install_log" || true)"
+
+# P0 Resolve context. Keep this final fixture row as discriminating as the
+# installer's own P0 row: the expected-RED comparator binds this exact reason.
+passwd_row="$(getent passwd "$(id -u)")"
+target_user="$(printf '%s' "$passwd_row" | cut -d: -f1)"
+passwd_home="$(printf '%s' "$passwd_row" | cut -d: -f6)"
+shell="$(printf '%s' "$passwd_row" | cut -d: -f7)"
+if [[ "$(id -u)" -eq 1001 && "$target_user" == "mosaic" \
+  && "$home" == "/home/mosaic" && "$home" == "$passwd_home" && "$shell" == "/bin/bash" ]] \
+  && ldd --version 2>&1 | grep -i 'glibc\|gnu libc' >/dev/null \
+  && [[ "$(node -p 'Number(process.versions.node.split(".")[0])')" -ge 20 ]]; then
+  phase_pass P0 "target=$target_user uid=$(id -u) HOME=$home passwd_HOME=$passwd_home shell=$shell privilege=user arch=$(uname -m) libc=glibc node=$(node --version) npm=$(npm --version)"
+else
+  phase_fail P0 "context unresolved or unsupported (target=${target_user:-unknown} uid=$(id -u) HOME=$home passwd_HOME=${passwd_home:-unknown} shell=${shell:-unknown} privilege=user)"
+fi
+
+# P1 Preflight
+missing_tools=()
+for tool in bash curl git node npm python3 tar; do
+  command -v "$tool" >/dev/null 2>&1 || missing_tools+=("$tool")
+done
+if [[ "${#missing_tools[@]}" -eq 0 && -n "$resolved_version" && -w "$home" ]]; then
+  phase_pass P1 "required tools present (including downstream git); target HOME writable; registry lane resolved"
+else
+  phase_fail P1 "undeclared/missing prerequisite(s)=${missing_tools[*]:-none}; target_writable=$([[ -w "$home" ]] && echo yes || echo no) registry_resolved=$([[ -n "$resolved_version" ]] && echo yes || echo no)"
+fi
+
+# P2 Acquire artifacts
+if [[ -n "$resolved_version" ]] && grep -qF "$resolved_version" "$install_log"; then
+  phase_pass P2 "lane=$lane pinned_version=$resolved_version recorded in installer transcript"
+else
+  phase_fail P2 "lane=$lane did not resolve and record a pinned artifact version"
+fi
+
+# P3 Install CLI — the discriminating row. Use the known absolute path only.
+cli="$prefix/bin/mosaic"
+cli_version=""
+if [[ -x "$cli" ]]; then
+  cli_version="$($cli --version 2>/dev/null | tail -n 1 | tr -d '\r' || true)"
+fi
+if [[ -x "$cli" && "$cli_version" == "$resolved_version" ]]; then
+  phase_pass P3 "absolute_path=$cli version=$cli_version equals resolved lane version"
+else
+  phase_fail P3 "absolute_path=$cli executable=$([[ -x "$cli" ]] && echo yes || echo no) got=${cli_version:-missing} expected=${resolved_version:-unresolved}"
+fi
+
+# P4 Framework + skills. C1 does not choose among the four disagreeing
+# candidate populations. It requires the installer to publish a lane/versioned
+# shipped-set declaration that a checkout-free install can resolve; C5 owns its
+# contents. Without that artifact P4 is NOT-MEASURED, never a fabricated count.
+declared_set="$mosaic_home/.install-shipped-skills.json"
+sync_store_count=0
+runtime_link_count=0
+[[ -d "$mosaic_home/skills" ]] \
+  && sync_store_count="$(find "$mosaic_home/skills" -mindepth 1 -maxdepth 1 -type d | wc -l | tr -d ' ')"
+[[ -d "$home/.pi/agent/skills" ]] \
+  && runtime_link_count="$(find "$home/.pi/agent/skills" -mindepth 1 -maxdepth 1 \( -type d -o -type l \) | wc -l | tr -d ' ')"
+printf '[P4-EVIDENCE] candidate_populations framework_payload=%s repo_root=%s sync_store=%s jarvis_W-jarvis_observation=7 runtime_links=%s\n' \
+  "$FIXTURE_FRAMEWORK_PAYLOAD_COUNT" "$FIXTURE_REPO_ROOT_COUNT" "$sync_store_count" "$runtime_link_count"
+if [[ ! -s "$declared_set" ]]; then
+  phase_fail P4 "NOT-MEASURED / UNDECLARED: installer published no checkout-free, lane/versioned shipped-set artifact at $declared_set"
+elif EXPECTED_LANE="$([[ "$lane" == next ]] && echo next || echo latest)" EXPECTED_VERSION="$resolved_version" \
+  MOSAIC_SKILLS_ROOT="$mosaic_home/skills" node - "$declared_set" <<'NODE'
+const fs = require('fs');
+const path = require('path');
+const data = JSON.parse(fs.readFileSync(process.argv[2], 'utf8'));
+const root = path.resolve(process.env.MOSAIC_SKILLS_ROOT);
+if (!data || data.lane !== process.env.EXPECTED_LANE || data.version !== process.env.EXPECTED_VERSION ||
+    !Array.isArray(data.skills) || data.skills.length === 0) process.exit(1);
+for (const name of data.skills) {
+  if (typeof name !== 'string' || !/^[A-Za-z0-9][A-Za-z0-9._-]*$/.test(name)) process.exit(1);
+  const skill = path.join(root, name, 'SKILL.md');
+  let real;
+  try { real = fs.realpathSync(skill); } catch { process.exit(1); }
+  const text = fs.readFileSync(real, 'utf8');
+  const declaredName = text.match(/^---\s*$[\s\S]*?^name:\s*([^\s]+)\s*$/m)?.[1];
+  if (!real.startsWith(root + path.sep) || !fs.statSync(real).isFile() || !text || declaredName !== name) process.exit(1);
+}
+NODE
+then
+  declared_count="$(node -p "require('$declared_set').skills.length")"
+  if [[ -s "$mosaic_home/.install-manifest.json" ]] \
+    && [[ "$(node -p "require('$mosaic_home/.install-manifest.json').phaseOutcomes?.P4 || 'committed'")" == failed ]]; then
+    phase_fail P4 "declared skills are present but the required framework/skills action reported failure"
+  else
+    phase_pass P4 "declared shipped-set matches lane/version and all $declared_count skill(s) are contained and loadable"
+  fi
+else
+  phase_fail P4 "shipped-set artifact is malformed, wrong-lane/version, or its declared skills are not contained and loadable"
+fi
+
+# P5 Identity
+identity_ok=true
+identity_reason=()
+for f in SOUL.md USER.md; do
+  path="$mosaic_home/$f"
+  if [[ ! -s "$path" ]]; then
+    identity_ok=false; identity_reason+=("$f missing-or-empty"); continue
+  fi
+  owner="$(stat -c '%u' "$path")"; mode="$(stat -c '%a' "$path")"
+  if [[ "$owner" != "$(id -u)" || "$mode" =~ [2367]$ ]]; then
+    identity_ok=false; identity_reason+=("$f owner=$owner mode=$mode")
+  fi
+done
+if [[ "$identity_ok" == true ]]; then
+  phase_pass P5 "SOUL.md and USER.md are non-empty and target-user owned with non-world-writable modes"
+else
+  phase_fail P5 "${identity_reason[*]}"
+fi
+
+# P6 Runtime linking / activation. #869 must remain unwired without its broker.
+manifest="$mosaic_home/.install-manifest.json"
+broker_present=false
+[[ -S "${XDG_RUNTIME_DIR:-/run/user/$(id -u)}/mosaic-lease/broker.sock" ]] && broker_present=true
+dead_hooks=0
+if [[ -f "$home/.claude/settings.json" ]]; then
+  dead_hooks="$(grep -Ec 'mutator-gate\.py|receipt-observer-client\.py' "$home/.claude/settings.json" || true)"
+fi
+p6_action_failed=false
+if [[ -s "$manifest" ]]; then
+  p6_action_failed="$(node -p "require('$manifest').phaseOutcomes?.P6 === 'failed' ? 'true' : 'false'" 2>/dev/null || echo true)"
+fi
+if [[ "$p6_action_failed" == true ]]; then
+  phase_fail P6 "runtime linking/activation action reported a required failure"
+elif [[ "$broker_present" == false && "$dead_hooks" -eq 0 ]]; then
+  phase_pass P6 "broker absent and #869 enforcement hooks remain inactive"
+elif [[ "$broker_present" == true ]]; then
+  phase_pass P6 "activation broker present; hook state is evaluable"
+else
+  phase_fail P6 "broker absent but dead enforcement hooks are active (count=$dead_hooks)"
+fi
+
+# P7 Services — none requested by --no-auto-launch.
+phase_pass P7 "no services requested by this fixture"
+
+# P8 Shell discoverability — actual target shell, fresh login and non-login.
+base_env=(env -i HOME="$home" USER=mosaic LOGNAME=mosaic SHELL=/bin/bash PATH=/usr/local/bin:/usr/bin:/bin)
+login_path="$("${base_env[@]}" /bin/bash -lc 'command -v mosaic' 2>/dev/null || true)"
+nonlogin_path="$("${base_env[@]}" /bin/bash -c 'command -v mosaic' 2>/dev/null || true)"
+if [[ "$login_path" == "$cli" && "$nonlogin_path" == "$cli" ]]; then
+  phase_pass P8 "login=$login_path nonlogin=$nonlogin_path equals P3 path"
+else
+  phase_fail P8 "fresh bash login=${login_path:-missing} nonlogin=${nonlogin_path:-missing} expected=$cli"
+fi
+
+manifest="$mosaic_home/.install-manifest.json"
+p0_p8_failures="$failures"
+if [[ "$p0_p8_failures" -eq 0 && -s "$manifest" ]]; then
+  phase_pass P9 "P0-P8 reasserted; manifest present"
+else
+  phase_fail P9 "P0-P8_failed_postconditions=$p0_p8_failures manifest=$([[ -s "$manifest" ]] && echo present || echo missing); install must not certify success"
+fi
+
+printf '[fixture] P0-P9_failed_rows=%d (includes P9 aggregate row)\n' "$failures"
+if [[ "$failures" -ne 0 ]]; then
   exit 1
 fi
+TARGET
+chmod 0755 /tmp/run-as-target.sh
+chown mosaic:mosaic /tmp/run-as-target.sh
+
+exec runuser -u mosaic -- env -i \
+  HOME=/home/mosaic USER=mosaic LOGNAME=mosaic SHELL=/bin/bash \
+  PATH=/usr/local/bin:/usr/bin:/bin \
+  FIXTURE_LANE="$FIXTURE_LANE" \
+  FIXTURE_GIT_MODE="$FIXTURE_GIT_MODE" \
+  FIXTURE_FRAMEWORK_PAYLOAD_COUNT="$FIXTURE_FRAMEWORK_PAYLOAD_COUNT" \
+  FIXTURE_REPO_ROOT_COUNT="$FIXTURE_REPO_ROOT_COUNT" \
+  MOSAIC_INSTALL_LOCAL_SOURCE_ARCHIVE="$([[ "$FIXTURE_SOURCE" == "checkout" ]] && echo /tmp/source-checkout.tar.gz)" \
+  MOSAIC_INSTALL_LOCAL_SOURCE_COMMIT="$FIXTURE_CHECKOUT_CONTENT_ID" \
+  MOSAIC_INSTALL_LOCAL_SOURCE_SHA256="$FIXTURE_CHECKOUT_SHA256" \
+  /bin/bash /tmp/run-as-target.sh
+INNER
+if [[ "$SOURCE" == "checkout" ]]; then
+  {
+    printf '\n__MOSAIC_CHECKOUT_ARCHIVE__\n'
+    base64 "$checkout_archive"
+  } >> "$inner"
+fi
+chmod 0755 "$inner"
+
+printf '[fixture] platform=Debian/glibc image=%s target_uid=1001 lane=%s source=%s git=%s\n' "$IMAGE" "$LANE" "$SOURCE" "$GIT_MODE"
+printf '[fixture] host inheritance: no bind mounts, no host HOME, no npm cache, no credentials\n'
+
+if [[ "$IN_CLEAN_CONTAINER" == "1" ]]; then
+  # Woodpecker already supplies the clean Debian container. The target install
+  # still runs through runuser + env -i, so CI variables/credentials do not
+  # enter the target user's process.
+  FIXTURE_LANE="$LANE" \
+  FIXTURE_SOURCE="$SOURCE" \
+  FIXTURE_GIT_MODE="$GIT_MODE" \
+  FIXTURE_INSTALLER_B64="$installer_b64" \
+  FIXTURE_INSTALLER_URL="$INSTALLER_URL" \
+  FIXTURE_INSTALLER_SHA256="$INSTALLER_SHA256" \
+  FIXTURE_CHECKOUT_SHA256="$checkout_digest" \
+  FIXTURE_CHECKOUT_CONTENT_ID="$checkout_content_id" \
+  FIXTURE_FRAMEWORK_PAYLOAD_COUNT="$framework_payload_count" \
+  FIXTURE_REPO_ROOT_COUNT="$repo_root_count" \
+    /bin/bash "$inner"
+else
+  # Copy the self-contained script+archive into a stopped container instead of
+  # bind-mounting the checkout or passing host paths. The target runtime still
+  # inherits no host HOME/cache/credentials, and the multi-megabyte checkout
+  # payload avoids argv/environment size limits.
+  fixture_cid="$(docker create \
+    --network bridge \
+    --env FIXTURE_LANE="$LANE" \
+    --env FIXTURE_SOURCE="$SOURCE" \
+    --env FIXTURE_GIT_MODE="$GIT_MODE" \
+    --env FIXTURE_INSTALLER_B64="$installer_b64" \
+    --env FIXTURE_INSTALLER_URL="$INSTALLER_URL" \
+    --env FIXTURE_INSTALLER_SHA256="$INSTALLER_SHA256" \
+    --env FIXTURE_CHECKOUT_SHA256="$checkout_digest" \
+    --env FIXTURE_CHECKOUT_CONTENT_ID="$checkout_content_id" \
+    --env FIXTURE_FRAMEWORK_PAYLOAD_COUNT="$framework_payload_count" \
+    --env FIXTURE_REPO_ROOT_COUNT="$repo_root_count" \
+    "$IMAGE" /bin/bash /tmp/mosaic-greenfield-fixture.sh)"
+  docker cp "$inner" "$fixture_cid:/tmp/mosaic-greenfield-fixture.sh"
+  set +e
+  docker start -a "$fixture_cid"
+  fixture_status=$?
+  set -e
+  docker rm "$fixture_cid" >/dev/null
+  exit "$fixture_status"
+fi

tools/fixtures/greenfield-expected-red.tsv

@@ -0,0 +1,57 @@
+# Pinned C1 expected-RED contract. Updating a verdict/reason requires review by the owning remediation lane.
+# case	kind	key/value
+next-git-present	exit	1
+next-git-present	phase	P0=PASS
+next-git-present	phase	P1=PASS
+next-git-present	phase	P2=PASS
+next-git-present	phase	P3=PASS
+next-git-present	phase	P4=FAIL
+next-git-present	phase	P5=FAIL
+next-git-present	phase	P6=FAIL
+next-git-present	phase	P7=PASS
+next-git-present	phase	P8=FAIL
+next-git-present	phase	P9=FAIL
+next-git-present	require	^\[fixture\] resolved lane=next .*version=[0-9]+\.[0-9]+\.[0-9]+-next\.
+next-git-present	require	^\[fixture\] installer_exit=1 done_claims=0$
+next-git-present	phase-reason	P0=target=mosaic uid=1001 HOME=/home/mosaic passwd_HOME=/home/mosaic shell=/bin/bash privilege=user arch=x86_64 libc=glibc node=v[0-9]+\.[0-9]+\.[0-9]+ npm=[0-9]+\.[0-9]+\.[0-9]+
+next-git-present	require	^\[SECRET-CONTROL\] PASS:
+next-git-present	require	^\[P3\] PASS: absolute_path=.* version=.* equals resolved lane version$
+next-git-present	require	^\[P4\] FAIL: NOT-MEASURED / UNDECLARED:
+next-git-present	require	^\[P6\] FAIL: runtime linking/activation action reported a required failure$
+next-git-present	forbid	Done\.|MOSAIC_C1_CANARY_|CLI not found on PATH
+main-git-present	exit	1
+main-git-present	phase	P0=PASS
+main-git-present	phase	P1=PASS
+main-git-present	phase	P2=PASS
+main-git-present	phase	P3=PASS
+main-git-present	phase	P4=FAIL
+main-git-present	phase	P5=FAIL
+main-git-present	phase	P6=FAIL
+main-git-present	phase	P7=PASS
+main-git-present	phase	P8=FAIL
+main-git-present	phase	P9=FAIL
+main-git-present	require	^\[fixture\] resolved lane=main .*version=[0-9]+\.[0-9]+\.[0-9]+$
+main-git-present	require	^\[fixture\] installer_exit=1 done_claims=0$
+main-git-present	phase-reason	P0=target=mosaic uid=1001 HOME=/home/mosaic passwd_HOME=/home/mosaic shell=/bin/bash privilege=user arch=x86_64 libc=glibc node=v[0-9]+\.[0-9]+\.[0-9]+ npm=[0-9]+\.[0-9]+\.[0-9]+
+main-git-present	require	^\[SECRET-CONTROL\] PASS:
+main-git-present	require	^\[P3\] PASS: absolute_path=.* version=.* equals resolved lane version$
+main-git-present	require	^\[P4\] FAIL: NOT-MEASURED / UNDECLARED:
+main-git-present	require	^\[P6\] FAIL: runtime linking/activation action reported a required failure
+main-git-present	forbid	Done\.|MOSAIC_C1_CANARY_|CLI not found on PATH
+next-git-absent	exit	1
+next-git-absent	phase	P0=PASS
+next-git-absent	phase	P1=FAIL
+next-git-absent	phase	P2=FAIL
+next-git-absent	phase	P3=FAIL
+next-git-absent	phase	P4=FAIL
+next-git-absent	phase	P5=FAIL
+next-git-absent	phase	P6=PASS
+next-git-absent	phase	P7=PASS
+next-git-absent	phase	P8=FAIL
+next-git-absent	phase	P9=FAIL
+next-git-absent	require	^\[fixture\] installer_exit=1 done_claims=0$
+next-git-absent	phase-reason	P0=target=mosaic uid=1001 HOME=/home/mosaic passwd_HOME=/home/mosaic shell=/bin/bash privilege=user arch=x86_64 libc=glibc node=v[0-9]+\.[0-9]+\.[0-9]+ npm=[0-9]+\.[0-9]+\.[0-9]+
+next-git-absent	require	^\[SECRET-CONTROL\] PASS:
+next-git-absent	require	^\[P1\] FAIL: undeclared/missing prerequisite\(s\)=git;
+next-git-absent	require	^\[P3\] FAIL: .*executable=no
+next-git-absent	forbid	Done\.|MOSAIC_C1_CANARY_

tools/install-next-lane.test.sh

@@ -0,0 +1,602 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+TMP="$(mktemp -d "${TMPDIR:-/tmp}/mosaic-next-install-test-XXXXXX")"
+trap 'rm -rf "$TMP"' EXIT
+export TMPDIR="$TMP/runtime-tmp"
+mkdir -p "$TMPDIR"
+
+FAKE_BIN="$TMP/bin"
+HOME_DIR="$TMP/home"
+PREFIX="$HOME_DIR/prefix"
+MOSAIC_HOME="$HOME_DIR/mosaic"
+STATE="$TMP/state"
+LOG="$TMP/npm.log"
+mkdir -p "$FAKE_BIN" "$HOME_DIR" "$STATE"
+
+# Model the supported non-root/glibc target explicitly even when this harness
+# itself runs as root in Alpine/BusyBox CI.
+cat > "$FAKE_BIN/id" <<'FAKE_ID'
+#!/usr/bin/env bash
+case "${1:-}" in
+  -u) echo 1001 ;;
+  -g) echo 1001 ;;
+  -un) echo fixture-user ;;
+  *) exec /bin/id "$@" ;;
+esac
+FAKE_ID
+cat > "$FAKE_BIN/getent" <<FAKE_GETENT
+#!/usr/bin/env bash
+printf 'fixture-user:x:1001:1001::%s:/bin/bash\n' '$HOME_DIR'
+FAKE_GETENT
+cat > "$FAKE_BIN/ldd" <<'FAKE_LDD'
+#!/usr/bin/env bash
+printf 'ldd (GNU libc) 2.36\n'
+FAKE_LDD
+cat > "$FAKE_BIN/stat" <<'FAKE_STAT'
+#!/usr/bin/env bash
+if [[ "${1:-} ${2:-}" == '-c %u' ]]; then
+  [[ "${3:-}" == "${MOSAIC_TEST_WRONG_OWNER_PATH:-__none__}" ]] && echo 9999 || echo 1001
+  exit 0
+fi
+if [[ "${1:-} ${2:-}" == '-c %g' ]]; then
+  [[ "${3:-}" == "${MOSAIC_TEST_WRONG_GROUP_PATH:-__none__}" ]] && echo 9999 || echo 1001
+  exit 0
+fi
+exec /bin/stat "$@"
+FAKE_STAT
+cat > "$FAKE_BIN/realpath" <<'FAKE_REALPATH'
+#!/usr/bin/env python3
+import os, sys
+args=sys.argv[1:]
+mode=args.pop(0) if args and args[0] in ('-e','-m') else '-m'
+if args and args[0]=='--': args.pop(0)
+if len(args)!=1 or (mode=='-e' and not os.path.exists(args[0])): raise SystemExit(1)
+print(os.path.realpath(args[0]))
+FAKE_REALPATH
+chmod 0755 "$FAKE_BIN/id" "$FAKE_BIN/getent" "$FAKE_BIN/ldd" "$FAKE_BIN/stat" "$FAKE_BIN/realpath"
+
+cat > "$FAKE_BIN/npm" <<'FAKE_NPM'
+#!/usr/bin/env bash
+set -euo pipefail
+LOG="${MOSAIC_TEST_NPM_LOG:?}"
+STATE="${MOSAIC_TEST_STATE:?}"
+echo "$*" >> "$LOG"
+
+if [[ "${1:-}" == "--version" ]]; then
+  echo "10.6.2"
+  exit 0
+fi
+
+install_cli() {
+  local version="$1"
+  echo "$version" > "$STATE/mosaic"
+  mkdir -p "${MOSAIC_PREFIX:?}/bin"
+  cat > "$MOSAIC_PREFIX/bin/mosaic" <<CLI
+#!/usr/bin/env bash
+set -euo pipefail
+if [[ "\${1:-}" == "wizard" ]]; then
+  printf 'wizard\n' >> "\${MOSAIC_TEST_NPM_LOG:?}"
+  mkdir -p "\${MOSAIC_HOME:?}" "\${HOME:?}/.config/mosaic-gateway"
+  printf '# Soul\\n\\nConfigured.\\n' > "\$MOSAIC_HOME/SOUL.md"
+  printf '# User\\n\\nConfigured.\\n' > "\$MOSAIC_HOME/USER.md"
+  chmod 0600 "\$MOSAIC_HOME/SOUL.md" "\$MOSAIC_HOME/USER.md"
+  exit 0
+fi
+printf '%s\\n' '$version'
+CLI
+  chmod +x "$MOSAIC_PREFIX/bin/mosaic"
+}
+
+if [[ "$1" == "view" ]]; then
+  if [[ "${MOSAIC_TEST_FAIL_NPM_VIEW:-0}" == "1" ]]; then
+    echo "forced registry metadata failure" >&2
+    exit 1
+  fi
+  case "$2 $3" in
+    "@mosaicstack/mosaic@next version") echo "0.0.49-next.999" ;;
+    "@mosaicstack/gateway@next version") echo "${MOSAIC_TEST_GATEWAY_NEXT_VERSION:-0.0.7-next.999}" ;;
+    "@mosaicstack/mosaic version") echo "0.0.48" ;;
+    *) echo "unexpected npm view: $*" >&2; exit 1 ;;
+  esac
+  exit 0
+fi
+
+if [[ "$1" == "install" ]]; then
+  if [[ -n "${MOSAIC_INSTALL_SECRET_CANARY:-}" ]]; then
+    printf 'registry diagnostic authToken=%s\n' "$MOSAIC_INSTALL_SECRET_CANARY"
+    printf 'urls=https://alice:p@[email protected]/a https://bob:pa:[email protected]/b https://carol:p%%[email protected]/c https://[email protected]/d https://user%%[email protected]/e\n'
+    printf 'Authorization: Basic QWxhZGRpbjpvcGVu\n//registry/:_auth=Ym9iOnNlY3JldA==\nCookie: session=abc123\nSet-Cookie: sid=xyz789\n'
+    printf '%s\n' "$MOSAIC_INSTALL_SECRET_CANARY" > "${MOSAIC_TEST_CANARY_OBSERVATION:?}"
+  fi
+  case "$*" in
+    *"@mosaicstack/[email protected]"*)
+      install_cli "0.0.49-next.999"
+      ;;
+    *"@mosaicstack/[email protected]"*)
+      if [[ "${MOSAIC_TEST_FAIL_NEXT_GATEWAY_INSTALL:-0}" == "1" ]]; then
+        echo "forced gateway install failure" >&2
+        exit 1
+      fi
+      echo "0.0.7-next.999" > "$STATE/gateway"
+      ;;
+    *"mosaicstack-mosaic-0.0.0-source.tgz"*)
+      install_cli "0.0.0-source"
+      ;;
+    *"mosaicstack-gateway-0.0.0-source.tgz"*)
+      echo "0.0.0-source" > "$STATE/gateway"
+      ;;
+    *) echo "unexpected npm install: $*" >&2; exit 1 ;;
+  esac
+  exit 0
+fi
+
+if [[ "$1" == "ls" ]]; then
+  cli="$(cat "$STATE/mosaic" 2>/dev/null || true)"
+  gateway="$(cat "$STATE/gateway" 2>/dev/null || true)"
+  node -e '
+    const cli = process.argv[1];
+    const gateway = process.argv[2];
+    const dependencies = {};
+    if (cli) dependencies["@mosaicstack/mosaic"] = { version: cli };
+    if (gateway) dependencies["@mosaicstack/gateway"] = { version: gateway };
+    process.stdout.write(JSON.stringify({ dependencies }));
+  ' "$cli" "$gateway"
+  exit 0
+fi
+
+echo "unexpected npm command: $*" >&2
+exit 1
+FAKE_NPM
+chmod +x "$FAKE_BIN/npm"
+
+cat > "$FAKE_BIN/curl" <<'FAKE_CURL'
+#!/usr/bin/env bash
+set -euo pipefail
+headers=""; output=""; url=""
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    -D) headers="$2"; shift 2 ;;
+    -o) output="$2"; shift 2 ;;
+    --max-filesize) shift 2 ;;
+    -*) shift ;;
+    *) url="$1"; shift ;;
+  esac
+done
+case "$url" in
+  */api/v1/repos/mosaicstack/stack/commits?sha=*)
+    printf 'HTTP/1.1 200 OK\r\ncontent-type: application/json; charset=utf-8\r\n\r\n' > "$headers"
+    printf '[{"sha":"1111111111111111111111111111111111111111"}]\n' > "$output"
+    ;;
+  */archive/*.tar.gz)
+    if [[ "${MOSAIC_TEST_CORRUPT_ARCHIVE:-0}" == "1" ]]; then
+      printf 'not-a-tarball\n' > "$output"
+    else
+      archive_root="$(mktemp -d)"
+      mkdir -p "$archive_root/stack"
+      printf 'fixture\n' > "$archive_root/stack/.fixture"
+      /bin/tar czf "$output" -C "$archive_root" stack
+      rm -rf "$archive_root"
+    fi
+    ;;
+esac
+FAKE_CURL
+chmod +x "$FAKE_BIN/curl"
+
+cat > "$FAKE_BIN/tar" <<'FAKE_TAR'
+#!/usr/bin/env bash
+set -euo pipefail
+dest=""; list=false
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    -C) dest="$2"; shift 2 ;;
+    -*t*|t*) list=true; shift ;;
+    *) shift ;;
+  esac
+done
+[[ "$list" == true ]] && exit 0
+if [[ -z "$dest" ]]; then
+  echo "fake tar missing -C destination" >&2
+  exit 1
+fi
+mkdir -p "$dest/stack/packages/mosaic/framework" "$dest/stack/apps/gateway"
+if [[ "${MOSAIC_TEST_EXTRA_ARCHIVE_ROOT:-0}" == "1" ]]; then
+  mkdir -p "$dest/unexpected-second-root"
+fi
+cat > "$dest/stack/packages/mosaic/framework/install.sh" <<'FRAMEWORK'
+#!/usr/bin/env bash
+set -euo pipefail
+expected="${MOSAIC_PREFIX:?}/bin/mosaic"
+[[ "${MOSAIC_CLI_PATH:-}" == "$expected" && -x "$MOSAIC_CLI_PATH" ]] || {
+  echo "framework did not receive P3 absolute CLI (got=${MOSAIC_CLI_PATH:-unset} expected=$expected)" >&2
+  exit 61
+}
+printf 'framework-cli=%s version=%s\n' "$MOSAIC_CLI_PATH" "$($MOSAIC_CLI_PATH --version)" >> "${MOSAIC_TEST_NPM_LOG:?}"
+mkdir -p "${MOSAIC_HOME:?}/credentials"
+chmod 0700 "$MOSAIC_HOME/credentials"
+printf '# framework fixture\n' > "$MOSAIC_HOME/AGENTS.md"
+FRAMEWORK
+chmod 0755 "$dest/stack/packages/mosaic/framework/install.sh"
+FAKE_TAR
+chmod +x "$FAKE_BIN/tar"
+
+cat > "$FAKE_BIN/pnpm" <<'FAKE_PNPM'
+#!/usr/bin/env bash
+set -euo pipefail
+LOG="${MOSAIC_TEST_NPM_LOG:?}"
+echo "pnpm $*" >> "$LOG"
+
+if [[ "$1" == "pack" ]]; then
+  out=""
+  while [[ $# -gt 0 ]]; do
+    case "$1" in
+      --pack-destination) out="$2"; shift 2 ;;
+      *) shift ;;
+    esac
+  done
+  if [[ -z "$out" ]]; then
+    echo "fake pnpm pack missing destination" >&2
+    exit 1
+  fi
+  mkdir -p "$out"
+  case "$PWD" in
+    */apps/gateway) touch "$out/mosaicstack-gateway-0.0.0-source.tgz" ;;
+    */packages/mosaic) touch "$out/mosaicstack-mosaic-0.0.0-source.tgz" ;;
+    *) echo "unexpected pnpm pack cwd: $PWD" >&2; exit 1 ;;
+  esac
+  exit 0
+fi
+
+if [[ "${MOSAIC_TEST_FAIL_PNPM_INSTALL:-0}" == "1" && "$1" == "install" ]]; then
+  echo "forced pnpm install failure" >&2
+  exit 42
+fi
+
+# Other install/build commands are no-ops in this harness.
+exit 0
+FAKE_PNPM
+chmod +x "$FAKE_BIN/pnpm"
+
+reset_state() {
+  : > "$LOG"
+  rm -f "$STATE"/*
+}
+
+tree_fingerprint() {
+  local root="$1"
+  if [[ ! -d "$root" ]]; then printf 'ABSENT\n'; return; fi
+  python3 - "$root" <<'PY'
+import hashlib, os, stat, sys
+root=os.path.abspath(sys.argv[1]); rows=[]
+for current, dirs, files in os.walk(root, topdown=True, followlinks=False):
+    for name in dirs + files:
+        path=os.path.join(current,name); meta=os.lstat(path)
+        rel=os.path.relpath(path,root)
+        target=os.readlink(path) if stat.S_ISLNK(meta.st_mode) else ''
+        digest=''
+        if stat.S_ISREG(meta.st_mode):
+            with open(path,'rb') as handle: digest=hashlib.sha256(handle.read()).hexdigest()
+        rows.append((rel,stat.S_IFMT(meta.st_mode),stat.S_IMODE(meta.st_mode),target,digest))
+payload='\n'.join('|'.join(map(str,row)) for row in sorted(rows)).encode()
+print(hashlib.sha256(payload).hexdigest())
+PY
+}
+
+prefix_fingerprint() { tree_fingerprint "$PREFIX"; }
+
+reset_state
+echo "[test] --next fast path pins resolved package versions"
+OUTPUT="$(
+  HOME="$HOME_DIR" \
+  MOSAIC_HOME="$MOSAIC_HOME" \
+  MOSAIC_PREFIX="$PREFIX" \
+  MOSAIC_NO_COLOR=1 \
+  MOSAIC_TEST_NPM_LOG="$LOG" \
+  MOSAIC_TEST_STATE="$STATE" \
+  PATH="$FAKE_BIN:$PATH" \
+  bash "$ROOT/tools/install.sh" --cli --next --yes --no-auto-launch
+)"
+
+grep -qF 'Installed @next packages: CLI 0.0.49-next.999, gateway 0.0.7-next.999' <<<"$OUTPUT"
+grep -qF 'install -g @mosaicstack/[email protected]' "$LOG"
+grep -qF 'install -g @mosaicstack/[email protected]' "$LOG"
+if grep -qE '^install -g .+@next( |$)' "$LOG"; then
+  echo "expected exact-version installs, found mutable @next install" >&2
+  exit 1
+fi
+if grep -qF 'Downloading source ref next at pinned commit' <<<"$OUTPUT"; then
+  echo "fast path unexpectedly fell back to source" >&2
+  exit 1
+fi
+
+ACTIVE="$HOME_DIR/.local/state/mosaic/install/active.json"
+[[ "$(node -p "require('$ACTIVE').status")" == "committed" ]]
+JOURNAL="$(node -p "require('$ACTIVE').journal")"
+[[ "$(stat -c '%a' "$JOURNAL")" == "444" ]]
+( cd "$(dirname "$JOURNAL")" && sha256sum -c "$(basename "$JOURNAL").sha256" >/dev/null )
+grep -q '"event":"mutation".*"phase":"P3".*path=.*prior=.*reverse=' "$JOURNAL"
+
+reset_state
+echo "[test] fast path failure falls back to source build"
+OUTPUT="$(
+  HOME="$HOME_DIR" \
+  MOSAIC_HOME="$MOSAIC_HOME" \
+  MOSAIC_PREFIX="$PREFIX" \
+  MOSAIC_NO_COLOR=1 \
+  MOSAIC_TEST_NPM_LOG="$LOG" \
+  MOSAIC_TEST_STATE="$STATE" \
+  MOSAIC_TEST_FAIL_NEXT_GATEWAY_INSTALL=1 \
+  PATH="$FAKE_BIN:$PATH" \
+  bash "$ROOT/tools/install.sh" --cli --next --yes --no-auto-launch
+)"
+
+grep -qF 'Fast gateway @next install failed.' <<<"$OUTPUT"
+grep -qF 'Falling back to source build at ref next; --next will not hard-fail on registry issues.' <<<"$OUTPUT"
+grep -qF 'Downloading source ref next at pinned commit 1111111111111111111111111111111111111111' <<<"$OUTPUT"
+grep -qF 'Installed from source: CLI 0.0.0-source' <<<"$OUTPUT"
+grep -qF 'install -g @mosaicstack/[email protected]' "$LOG"
+grep -qE 'install -g .*/mosaicstack-gateway-0\.0\.0-source\.tgz' "$LOG"
+grep -qE 'install -g .*/mosaicstack-mosaic-0\.0\.0-source\.tgz' "$LOG"
+[[ "$(cat "$STATE/mosaic")" == "0.0.0-source" ]]
+[[ "$(cat "$STATE/gateway")" == "0.0.0-source" ]]
+
+reset_state
+echo "[test] source-build failure is fatal and restores the pre-install prefix"
+before_prefix="$(prefix_fingerprint)"
+set +e
+OUTPUT="$(
+  HOME="$HOME_DIR" \
+  MOSAIC_HOME="$MOSAIC_HOME" \
+  MOSAIC_PREFIX="$PREFIX" \
+  MOSAIC_NO_COLOR=1 \
+  MOSAIC_TEST_NPM_LOG="$LOG" \
+  MOSAIC_TEST_STATE="$STATE" \
+  MOSAIC_TEST_FAIL_NEXT_GATEWAY_INSTALL=1 \
+  MOSAIC_TEST_FAIL_PNPM_INSTALL=1 \
+  PATH="$FAKE_BIN:$PATH" \
+  bash "$ROOT/tools/install.sh" --cli --next --yes --no-auto-launch 2>&1
+)"
+FAIL_STATUS=$?
+set -e
+[[ "$FAIL_STATUS" -ne 0 ]]
+[[ "$(prefix_fingerprint)" == "$before_prefix" ]]
+grep -qF 'forced pnpm install failure' <<<"$OUTPUT"
+[[ "$(node -p "require('$ACTIVE').status")" == "rolled-back" ]]
+
+reset_state
+echo "[test] corrupt source archive is fatal and restores the pre-install prefix"
+before_prefix="$(prefix_fingerprint)"
+set +e
+OUTPUT="$(
+  HOME="$HOME_DIR" \
+  MOSAIC_HOME="$MOSAIC_HOME" \
+  MOSAIC_PREFIX="$PREFIX" \
+  MOSAIC_NO_COLOR=1 \
+  MOSAIC_TEST_NPM_LOG="$LOG" \
+  MOSAIC_TEST_STATE="$STATE" \
+  MOSAIC_TEST_FAIL_NEXT_GATEWAY_INSTALL=1 \
+  MOSAIC_TEST_CORRUPT_ARCHIVE=1 \
+  PATH="$FAKE_BIN:$PATH" \
+  bash "$ROOT/tools/install.sh" --cli --next --yes --no-auto-launch 2>&1
+)"
+FAIL_STATUS=$?
+set -e
+[[ "$FAIL_STATUS" -ne 0 ]]
+[[ "$(prefix_fingerprint)" == "$before_prefix" ]]
+grep -qF 'archive safety/integrity check failed' <<<"$OUTPUT"
+[[ "$(node -p "require('$ACTIVE').status")" == "rolled-back" ]]
+
+reset_state
+echo "[test] source archive with multiple extracted roots fails instead of selecting by find order"
+before_prefix="$(prefix_fingerprint)"
+set +e
+OUTPUT="$(
+  HOME="$HOME_DIR" \
+  MOSAIC_HOME="$MOSAIC_HOME" \
+  MOSAIC_PREFIX="$PREFIX" \
+  MOSAIC_NO_COLOR=1 \
+  MOSAIC_TEST_NPM_LOG="$LOG" \
+  MOSAIC_TEST_STATE="$STATE" \
+  MOSAIC_TEST_FAIL_NEXT_GATEWAY_INSTALL=1 \
+  MOSAIC_TEST_EXTRA_ARCHIVE_ROOT=1 \
+  PATH="$FAKE_BIN:$PATH" \
+  bash "$ROOT/tools/install.sh" --cli --next --yes --no-auto-launch 2>&1
+)"
+FAIL_STATUS=$?
+set -e
+[[ "$FAIL_STATUS" -ne 0 ]]
+[[ "$(prefix_fingerprint)" == "$before_prefix" ]]
+grep -qF 'expected exactly one extracted source root' <<<"$OUTPUT"
+[[ "$(node -p "require('$ACTIVE').status")" == "rolled-back" ]]
+
+reset_state
+echo "[test] --dev source install does not require registry version resolution"
+OUTPUT="$(
+  HOME="$HOME_DIR" \
+  MOSAIC_HOME="$MOSAIC_HOME" \
+  MOSAIC_PREFIX="$PREFIX" \
+  MOSAIC_NO_COLOR=1 \
+  MOSAIC_TEST_NPM_LOG="$LOG" \
+  MOSAIC_TEST_STATE="$STATE" \
+  MOSAIC_TEST_FAIL_NPM_VIEW=1 \
+  PATH="$FAKE_BIN:$PATH" \
+  bash "$ROOT/tools/install.sh" --cli --dev --ref feature-x --yes --no-auto-launch
+)"
+grep -qF 'Downloading source ref feature-x at pinned commit 1111111111111111111111111111111111111111' <<<"$OUTPUT"
+grep -qF 'Installed from source: CLI 0.0.0-source' <<<"$OUTPUT"
+grep -q '^\[P2\] PASS: source_ref=feature-x pinned_commit=1111111111111111111111111111111111111111 sha256=' <<<"$OUTPUT"
+
+reset_state
+echo "[test] explicit --ref keeps source lane and avoids @next lookup"
+set +e
+OUTPUT="$(
+  HOME="$HOME_DIR" \
+  MOSAIC_HOME="$MOSAIC_HOME" \
+  MOSAIC_PREFIX="$PREFIX" \
+  MOSAIC_NO_COLOR=1 \
+  MOSAIC_TEST_NPM_LOG="$LOG" \
+  MOSAIC_TEST_STATE="$STATE" \
+  PATH="$FAKE_BIN:$PATH" \
+  bash "$ROOT/tools/install.sh" --check --cli --next --ref feature-x
+)"
+CHECK_STATUS=$?
+set -e
+[[ "$CHECK_STATUS" -ne 0 ]]
+grep -q '^\[P2\] PASS: source_ref=feature-x pinned_commit=1111111111111111111111111111111111111111 sha256=' <<<"$OUTPUT"
+if grep -qF '@next version' "$LOG"; then
+  echo "explicit ref should not query @next dist-tags" >&2
+  exit 1
+fi
+
+reset_state
+echo "[test] --check --next rejects mismatched prerelease pipeline suffixes"
+set +e
+OUTPUT="$(
+  HOME="$HOME_DIR" \
+  MOSAIC_HOME="$MOSAIC_HOME" \
+  MOSAIC_PREFIX="$PREFIX" \
+  MOSAIC_NO_COLOR=1 \
+  MOSAIC_TEST_NPM_LOG="$LOG" \
+  MOSAIC_TEST_STATE="$STATE" \
+  MOSAIC_TEST_GATEWAY_NEXT_VERSION="0.0.7-next.1000" \
+  PATH="$FAKE_BIN:$PATH" \
+  bash "$ROOT/tools/install.sh" --check --cli --next
+)"
+CHECK_STATUS=$?
+set -e
+[[ "$CHECK_STATUS" -ne 0 ]]
+grep -q '^\[P2\] FAIL: resolved_version=unavailable' <<<"$OUTPUT"
+
+printf '[test] full framework path receives P3 absolute CLI without relying on PATH\n'
+rm -rf "$HOME_DIR" "$STATE"; mkdir -p "$HOME_DIR" "$STATE"; reset_state
+set +e
+OUTPUT="$(
+  HOME="$HOME_DIR" MOSAIC_HOME="$MOSAIC_HOME" MOSAIC_PREFIX="$PREFIX" \
+  MOSAIC_INSTALL_STATE_DIR="$TMP/full-state" MOSAIC_NO_COLOR=1 \
+  MOSAIC_TEST_NPM_LOG="$LOG" MOSAIC_TEST_STATE="$STATE" \
+  PATH="$FAKE_BIN:/usr/local/bin:/usr/bin:/bin" \
+  bash "$ROOT/tools/install.sh" --next --yes --no-auto-launch 2>&1
+)"
+FULL_STATUS=$?
+set -e
+[[ "$FULL_STATUS" -ne 0 ]] # P4 remains intentionally undeclared until C5.
+grep -qF "framework-cli=$PREFIX/bin/mosaic version=0.0.49-next.999" "$LOG"
+if grep -q "CLI not found on PATH\|did not receive P3 absolute CLI" <<<"$OUTPUT"; then
+  echo "internal framework phase depended on PATH instead of P3 absolute CLI" >&2
+  exit 1
+fi
+
+printf '[test] captured diagnostics redact seeded credential canary everywhere\n'
+rm -rf "$HOME_DIR" "$STATE"; mkdir -p "$HOME_DIR" "$STATE"; reset_state
+canary='C1_SECRET_CANARY_7df4c2'
+OUTPUT="$(
+  HOME="$HOME_DIR" MOSAIC_HOME="$MOSAIC_HOME" MOSAIC_PREFIX="$PREFIX" \
+  MOSAIC_INSTALL_STATE_DIR="$TMP/secret-state" MOSAIC_NO_COLOR=1 \
+  MOSAIC_INSTALL_SECRET_CANARY="$canary" MOSAIC_TEST_CANARY_OBSERVATION="$TMP/canary-observed" \
+  MOSAIC_TEST_NPM_LOG="$LOG" MOSAIC_TEST_STATE="$STATE" \
+  PATH="$FAKE_BIN:/usr/local/bin:/usr/bin:/bin" \
+  bash "$ROOT/tools/install.sh" --cli --next --yes --no-auto-launch 2>&1
+)"
+if grep -qF "$canary" <<<"$OUTPUT"; then echo 'credential canary leaked to terminal output' >&2; exit 1; fi
+if grep -Eq 'alice:p@ss|bob:pa:ss|carol:p%40ss|token@example|user%3Apass|QWxhZGRpbjpvcGVu|Ym9iOnNlY3JldA|session=abc123|sid=xyz789' <<<"$OUTPUT"; then
+  echo 'credentialed URL userinfo leaked to terminal output' >&2; exit 1
+fi
+for host in example.com example.net example.org example.dev example.io; do
+  grep -qF "https://[REDACTED]@$host" <<<"$OUTPUT" \
+    || { echo "credentialed URL redaction control missing for $host" >&2; exit 1; }
+done
+secret_active="$TMP/secret-state/active.json"
+secret_journal="$(node -p "require('$secret_active').journal")"
+secret_command_log="$(dirname "$secret_journal")/commands.log"
+if grep -R -F "$canary" "$secret_command_log" "$HOME_DIR" 2>/dev/null; then
+  echo 'credential canary leaked to persistent installer output' >&2; exit 1
+fi
+if grep -E 'alice:p@ss|bob:pa:ss|carol:p%40ss|token@example|user%3Apass|QWxhZGRpbjpvcGVu|Ym9iOnNlY3JldA|session=abc123|sid=xyz789' "$secret_command_log" >/dev/null; then
+  echo 'credentialed URL userinfo leaked to persistent installer output' >&2; exit 1
+fi
+if [[ "$(cat "$TMP/canary-observed" 2>/dev/null || true)" != "$canary" ]]; then
+  echo 'credential canary positive control was not exercised' >&2; exit 1
+fi
+if find "$TMPDIR" -maxdepth 1 -type f \( -name 'mosaic-phase-redacted.*' -o -name 'mosaic-post-redacted.*' \) -print -quit | grep -q .; then
+  echo 'redacted diagnostic staging file survived normal completion' >&2; exit 1
+fi
+
+printf '[test] framework nested capture redacts the same canary and URL variants\n'
+framework_test_home="$TMP/framework-redact-home"
+framework_target="$framework_test_home/.config/mosaic"
+framework_cli="$TMP/framework-redact-cli"
+framework_log="$TMP/framework-redact-commands.log"
+framework_status="$TMP/framework-redact-status.tsv"
+mkdir -p "$framework_test_home"; : > "$framework_log"; : > "$framework_status"
+cat > "$framework_cli" <<'FRAMEWORK_CLI'
+#!/usr/bin/env bash
+printf 'nested authToken=%s\n' "${MOSAIC_INSTALL_SECRET_CANARY:?}"
+printf 'nested=https://alice:p@[email protected]/a https://bob:pa:[email protected]/b https://carol:p%%[email protected]/c https://[email protected]/d https://user%%[email protected]/e\n'
+printf 'Authorization: Basic QWxhZGRpbjpvcGVu\n//registry/:_auth=Ym9iOnNlY3JldA==\nCookie: session=abc123\nSet-Cookie: sid=xyz789\n'
+exit 1
+FRAMEWORK_CLI
+chmod 0755 "$framework_cli"
+set +e
+FRAMEWORK_OUTPUT="$(
+  HOME="$framework_test_home" MOSAIC_HOME="$framework_target" MOSAIC_INSTALL_MODE=overwrite \
+  MOSAIC_CLI_PATH="$framework_cli" MOSAIC_INSTALL_SECRET_CANARY="$canary" \
+  MOSAIC_INSTALL_COMMAND_LOG="$framework_log" MOSAIC_INSTALL_PHASE_STATUS_FILE="$framework_status" \
+  MOSAIC_ALLOW_MISSING_SEQUENTIAL_THINKING=1 MOSAIC_SKIP_SKILLS_SYNC=1 \
+  bash "$ROOT/packages/mosaic/framework/install.sh" 2>&1
+)"
+framework_install_status=$?
+set -e
+[[ "$framework_install_status" -eq 0 ]]
+if grep -Eq "$canary|alice:p@ss|bob:pa:ss|carol:p%40ss|token@example|user%3Apass|QWxhZGRpbjpvcGVu|Ym9iOnNlY3JldA|session=abc123|sid=xyz789" <<<"$FRAMEWORK_OUTPUT" \
+  || grep -Eq "$canary|alice:p@ss|bob:pa:ss|carol:p%40ss|token@example|user%3Apass|QWxhZGRpbjpvcGVu|Ym9iOnNlY3JldA|session=abc123|sid=xyz789" "$framework_log"; then
+  echo 'framework nested capture leaked credential diagnostics' >&2; exit 1
+fi
+for host in example.com example.net example.org example.dev example.io; do
+  grep -qF "https://[REDACTED]@$host" "$framework_log" \
+    || { echo "framework URL redaction control missing for $host" >&2; exit 1; }
+done
+
+printf '[test] real P2-P8 actions run under fault injection and restore actual surfaces\n'
+for phase in P2 P3 P4 P5 P6 P7 P8; do
+  rm -rf "$HOME_DIR" "$STATE" "$TMP/fault-$phase"; mkdir -p "$HOME_DIR" "$STATE" "$TMP/fault-$phase"
+  printf 'operator-sentinel\n' > "$HOME_DIR/operator.txt"
+  reset_state
+  before="$(tree_fingerprint "$HOME_DIR")"
+  set +e
+  HOME="$HOME_DIR" MOSAIC_HOME="$MOSAIC_HOME" MOSAIC_PREFIX="$PREFIX" \
+    MOSAIC_INSTALL_STATE_DIR="$TMP/fault-$phase" MOSAIC_INSTALL_FAULT_AFTER="$phase" \
+    MOSAIC_INSTALL_SELF_TEST_ALLOW=1 MOSAIC_NO_COLOR=1 \
+    MOSAIC_TEST_NPM_LOG="$LOG" MOSAIC_TEST_STATE="$STATE" \
+    PATH="$FAKE_BIN:/usr/local/bin:/usr/bin:/bin" \
+    bash "$ROOT/tools/install.sh" --state-machine-self-test --next --yes \
+    >"$TMP/fault-$phase.log" 2>&1
+  status=$?
+  set -e
+  [[ "$status" -eq 97 ]] || { echo "$phase real fault expected 97, got $status" >&2; exit 1; }
+  [[ -s "$LOG" ]] || { echo "$phase fault never entered the real action path" >&2; exit 1; }
+  [[ "$(tree_fingerprint "$HOME_DIR")" == "$before" ]] || { echo "$phase real rollback mismatch" >&2; exit 1; }
+  grep -q "phase=$phase" "$TMP/fault-$phase.log"
+  if find "$TMP/fault-$phase" -type f -exec grep -l '"status"[[:space:]]*:[[:space:]]*"in-progress"' {} + 2>/dev/null | grep -q .; then
+    echo "$phase left an in-progress transaction" >&2; exit 1
+  fi
+done
+
+printf '[test] stale projection is preserved while the real fault path acquires a free OS lock\n'
+rm -rf "$HOME_DIR" "$STATE" "$TMP/stale-state"; mkdir -p "$HOME_DIR" "$STATE" "$TMP/stale-state"
+printf '{"status":"in-progress","journal":"%s"}\n' "$TMP/stale-state/dead-run/journal.ndjson" > "$TMP/stale-state/active.json"
+reset_state
+set +e
+HOME="$HOME_DIR" MOSAIC_HOME="$MOSAIC_HOME" MOSAIC_PREFIX="$PREFIX" \
+  MOSAIC_INSTALL_STATE_DIR="$TMP/stale-state" MOSAIC_INSTALL_FAULT_AFTER=P2 \
+  MOSAIC_INSTALL_SELF_TEST_ALLOW=1 MOSAIC_NO_COLOR=1 \
+  MOSAIC_TEST_NPM_LOG="$LOG" MOSAIC_TEST_STATE="$STATE" \
+  PATH="$FAKE_BIN:/usr/local/bin:/usr/bin:/bin" \
+  bash "$ROOT/tools/install.sh" --state-machine-self-test --next --yes >"$TMP/stale.log" 2>&1
+stale_status=$?
+set -e
+[[ "$stale_status" -eq 97 ]]
+find "$TMP/stale-state" -name prior-active.json -type f -print -quit | grep -q .
+[[ "$(node -p "require('$TMP/stale-state/active.json').status")" == rolled-back ]]
+
+echo "[test] installer next lane tests passed"

tools/install-state-machine.test.sh

@@ -0,0 +1,428 @@
+#!/usr/bin/env bash
+# Red-first acceptance checks for #1050. This file is committed before the
+# installer implementation. Do not weaken these properties to make it green.
+
+# pass_case always returns zero and fail_case records the aggregate failure;
+# the compact A&&pass||fail assertions are intentional.
+# shellcheck disable=SC2015
+set -uo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+TMP="$(mktemp -d "${TMPDIR:-/tmp}/mosaic-install-state-test.XXXXXX")"
+trap 'rm -rf "$TMP"' EXIT
+failures=0
+COMPAT_BIN="$TMP/compat-bin"
+mkdir -p "$COMPAT_BIN"
+cat > "$COMPAT_BIN/realpath" <<'REALPATH'
+#!/usr/bin/env python3
+import os
+import sys
+
+args = sys.argv[1:]
+mode = args.pop(0) if args and args[0] in ("-e", "-m") else "-m"
+if args and args[0] == "--":
+    args.pop(0)
+if len(args) != 1 or (mode == "-e" and not os.path.exists(args[0])):
+    raise SystemExit(1)
+print(os.path.realpath(args[0]))
+REALPATH
+chmod 0755 "$COMPAT_BIN/realpath"
+
+fail_case() { printf '[test] FAIL: %s\n' "$*" >&2; failures=$((failures + 1)); }
+pass_case() { printf '[test] PASS: %s\n' "$*"; }
+
+fingerprint() {
+  local dir="$1"
+  if [[ ! -d "$dir" ]]; then printf 'ABSENT\n'; return; fi
+  python3 - "$dir" <<'PY'
+import hashlib
+import os
+import stat
+import sys
+
+root = os.path.abspath(sys.argv[1])
+rows = []
+for current, dirs, files in os.walk(root, topdown=True, followlinks=False):
+    for name in dirs + files:
+        path = os.path.join(current, name)
+        rel = os.path.relpath(path, root)
+        meta = os.lstat(path)
+        target = os.readlink(path) if stat.S_ISLNK(meta.st_mode) else ""
+        digest = ""
+        if stat.S_ISREG(meta.st_mode):
+            with open(path, "rb") as handle:
+                digest = hashlib.sha256(handle.read()).hexdigest()
+        rows.append((rel, stat.S_IFMT(meta.st_mode), stat.S_IMODE(meta.st_mode), meta.st_uid, meta.st_gid, target, digest))
+payload = "\n".join("|".join(map(str, row)) for row in sorted(rows)).encode()
+print(hashlib.sha256(payload).hexdigest())
+PY
+}
+
+make_fake_npm() {
+  local bin="$1"
+  mkdir -p "$bin"
+  cat > "$bin/npm" <<'FAKE'
+#!/bin/bash
+set -euo pipefail
+if [[ "${1:-}" == "--version" ]]; then echo '10.6.2'; exit 0; fi
+case "${1:-} ${2:-} ${3:-}" in
+  'view @mosaicstack/mosaic@next version') echo '0.0.50-next.999' ;;
+  'view @mosaicstack/gateway@next version') echo '0.0.7-next.999' ;;
+  'view @mosaicstack/mosaic version') echo '0.0.49' ;;
+  'ls -g --depth=0'|'ls -g --json') echo '{"dependencies":{"@mosaicstack/mosaic":{"version":"0.0.50-next.999"},"@mosaicstack/gateway":{"version":"0.0.7-next.999"}}}' ;;
+  ls*) echo '{"dependencies":{"@mosaicstack/mosaic":{"version":"0.0.50-next.999"},"@mosaicstack/gateway":{"version":"0.0.7-next.999"}}}' ;;
+  *) echo "unexpected fake npm command: $*" >&2; exit 1 ;;
+esac
+FAKE
+  chmod 0755 "$bin/npm"
+}
+
+printf '[test] case: --check enumerates exactly P0-P8, discriminates, and mutates nothing\n'
+check_home="$TMP/check-home"
+check_bin="$TMP/check-bin"
+mkdir -p "$check_home/.config/mosaic/skills/alpha" "$check_home/.npm-global/bin" "$check_bin"
+printf '# framework\n' > "$check_home/.config/mosaic/AGENTS.md"
+printf '# skill\n' > "$check_home/.config/mosaic/skills/alpha/SKILL.md"
+cat > "$check_home/.npm-global/bin/mosaic" <<'CLI'
+#!/usr/bin/env bash
+printf '0.0.50-next.999\n'
+CLI
+chmod 0755 "$check_home/.npm-global/bin/mosaic"
+make_fake_npm "$check_bin"
+before="$(fingerprint "$check_home")"
+set +e
+HOME="$check_home" MOSAIC_HOME="$check_home/.config/mosaic" MOSAIC_PREFIX="$check_home/.npm-global" \
+  MOSAIC_NO_COLOR=1 PATH="$check_bin:/usr/local/bin:/usr/bin:/bin" \
+  bash "$ROOT/tools/install.sh" --check --next >"$TMP/check.log" 2>&1
+check_status=$?
+set -e
+after="$(fingerprint "$check_home")"
+
+[[ "$before" == "$after" ]] && pass_case '--check left the complete HOME fingerprint unchanged' \
+  || fail_case "--check mutated HOME (before=$before after=$after)"
+[[ "$check_status" -ne 0 ]] && pass_case '--check exited non-zero for failed P4/P5/P8 predicates' \
+  || fail_case '--check returned zero on the deliberately broken host'
+
+phase_rows=0
+for phase in P0 P1 P2 P3 P4 P5 P6 P7 P8; do
+  count="$(grep -Ec "^\[$phase\] (PASS|FAIL):" "$TMP/check.log" || true)"
+  [[ "$count" -eq 1 ]] || fail_case "$phase expected exactly one PASS/FAIL row, got $count"
+  phase_rows=$((phase_rows + count))
+done
+[[ "$phase_rows" -eq 9 ]] && pass_case '--check emitted exactly nine P0-P8 result rows' \
+  || fail_case "--check emitted $phase_rows canonical rows instead of 9"
+grep -q '^\[P3\] PASS:.*0\.0\.50-next\.999' "$TMP/check.log" \
+  && pass_case 'P3 preserves the absolute-path exact-version discriminator' \
+  || fail_case 'P3 did not PASS with the exact resolved next-lane version'
+grep -q '^\[P4\] FAIL: NOT-MEASURED / UNDECLARED:' "$TMP/check.log" \
+  && pass_case 'P4 refuses fabricated precision when no shipped-set declaration exists' \
+  || fail_case 'P4 did not report the declared-set population as NOT-MEASURED / UNDECLARED'
+for phase in P5 P8; do
+  grep -q "^\[$phase\] FAIL:" "$TMP/check.log" \
+    && pass_case "$phase remains an attributable expected RED" \
+    || fail_case "$phase did not report its own expected failure"
+done
+
+printf '[test] case: --check discriminates a constructed good host without mutation\n'
+good_home="$TMP/good-home"
+good_bin="$TMP/good-bin"
+good_prefix="$good_home/.npm-global"
+good_mosaic="$good_home/.config/mosaic"
+mkdir -p "$good_bin" "$good_prefix/bin" "$good_mosaic/skills/declared-skill"
+make_fake_npm "$good_bin"
+cp "$COMPAT_BIN/realpath" "$good_bin/realpath"
+cat > "$good_bin/id" <<'ID'
+#!/bin/bash
+uid="${MOSAIC_TEST_UID:-1001}"
+gid="${MOSAIC_TEST_GID:-1001}"
+user="${MOSAIC_TEST_USER:-fixture-user}"
+case "${1:-}" in
+  -u) echo "$uid" ;;
+  -g) echo "$gid" ;;
+  -un) echo "$user" ;;
+  *) exec /bin/id "$@" ;;
+esac
+ID
+cat > "$good_bin/stat" <<'STAT'
+#!/bin/bash
+if [[ "${1:-} ${2:-}" == '-c %u' ]]; then
+  [[ "${3:-}" == "${MOSAIC_TEST_WRONG_OWNER_PATH:-__none__}" ]] && echo 9999 || echo "${MOSAIC_TEST_UID:-1001}"
+  exit 0
+fi
+if [[ "${1:-} ${2:-}" == '-c %g' ]]; then
+  [[ "${3:-}" == "${MOSAIC_TEST_WRONG_GROUP_PATH:-__none__}" ]] && echo 9999 || echo "${MOSAIC_TEST_GID:-1001}"
+  exit 0
+fi
+exec /bin/stat "$@"
+STAT
+cat > "$good_bin/curl" <<'CURL'
+#!/bin/bash
+exit 0
+CURL
+cat > "$good_bin/ldd" <<'LDD'
+#!/bin/bash
+echo 'ldd (GNU libc) 2.36'
+LDD
+chmod 0755 "$good_bin/id" "$good_bin/stat" "$good_bin/curl" "$good_bin/ldd"
+cat > "$good_prefix/bin/mosaic" <<'CLI'
+#!/usr/bin/env bash
+printf '0.0.50-next.999\n'
+CLI
+chmod 0755 "$good_prefix/bin/mosaic"
+cat > "$good_bin/getent" <<GETENT
+#!/bin/bash
+printf '%s:x:%s:%s::%s:%s\\n' "\${MOSAIC_TEST_USER:-fixture-user}" "\${MOSAIC_TEST_UID:-1001}" "\${MOSAIC_TEST_GID:-1001}" "\${MOSAIC_TEST_PASSWD_HOME:-$good_home}" '$good_bin/bash'
+GETENT
+cat > "$good_bin/bash" <<SHELL
+#!/bin/bash
+if [[ "\${*: -1}" == 'command -v mosaic' ]]; then
+  printf '%s\\n' '$good_prefix/bin/mosaic'
+  exit 0
+fi
+exec /bin/bash "\$@"
+SHELL
+chmod 0755 "$good_bin/getent" "$good_bin/bash"
+printf '# Soul\n\nConfigured.\n' > "$good_mosaic/SOUL.md"
+printf '# User\n\nConfigured.\n' > "$good_mosaic/USER.md"
+chmod 0600 "$good_mosaic/SOUL.md" "$good_mosaic/USER.md"
+cat > "$good_mosaic/skills/declared-skill/SKILL.md" <<'SKILL'
+---
+name: declared-skill
+description: Constructed loadable acceptance skill.
+---
+
+# Declared skill
+SKILL
+printf '{"lane":"next","version":"0.0.50-next.999","skills":["declared-skill"]}\n' > "$good_mosaic/.install-shipped-skills.json"
+printf '{\n  "lane": "next",\n  "cliVersion": "0.0.50-next.999"\n}\n' > "$good_mosaic/.install-manifest.json"
+before="$(fingerprint "$good_home")"
+set +e
+HOME="$good_home" MOSAIC_HOME="$good_mosaic" MOSAIC_PREFIX="$good_prefix" \
+  MOSAIC_NO_COLOR=1 PATH="$good_bin:/usr/local/bin:/usr/bin:/bin" \
+  bash "$ROOT/tools/install.sh" --check --next >"$TMP/good-check.log" 2>&1
+status=$?
+set -e
+after="$(fingerprint "$good_home")"
+[[ "$status" -eq 0 ]] && pass_case 'good-host --check exited zero' || fail_case "good-host --check exited $status"
+[[ "$before" == "$after" ]] && pass_case 'good-host --check left HOME unchanged' || fail_case 'good-host --check mutated HOME'
+good_rows="$(grep -Ec '^\[P[0-8]\] PASS:' "$TMP/good-check.log" || true)"
+[[ "$good_rows" -eq 9 ]] && pass_case 'good-host --check emitted nine PASS rows' \
+  || { cat "$TMP/good-check.log" >&2; fail_case "good-host --check emitted $good_rows PASS rows"; }
+
+printf '[test] case: P0 binds uid, username, passwd HOME, shell, and privilege mode\n'
+passwd_home="$TMP/passwd-authoritative-home"
+mkdir -p "$passwd_home"
+set +e
+HOME="$good_home" MOSAIC_HOME="$good_mosaic" MOSAIC_PREFIX="$good_prefix" \
+  MOSAIC_TEST_PASSWD_HOME="$passwd_home" MOSAIC_NO_COLOR=1 \
+  PATH="$good_bin:/usr/local/bin:/usr/bin:/bin" \
+  bash "$ROOT/tools/install.sh" --check --next >"$TMP/wrong-home.log" 2>&1
+wrong_home_status=$?
+set -e
+[[ "$wrong_home_status" -ne 0 ]] || fail_case 'P0 accepted ambient HOME that disagrees with passwd HOME'
+grep -q '^\[P0\] FAIL:.*HOME mismatch' "$TMP/wrong-home.log" \
+  && pass_case 'P0 rejects ambient HOME that disagrees with passwd HOME' \
+  || fail_case 'P0 did not attribute the passwd HOME mismatch'
+
+for privilege_case in root-with-home sudo-with-inherited-home; do
+  extra_env=()
+  [[ "$privilege_case" == sudo-with-inherited-home ]] && extra_env+=(SUDO_USER=fixture-user SUDO_UID=1001)
+  set +e
+  env HOME="$good_home" MOSAIC_HOME="$good_mosaic" MOSAIC_PREFIX="$good_prefix" \
+    MOSAIC_TEST_UID=0 MOSAIC_TEST_GID=0 MOSAIC_TEST_USER=root MOSAIC_TEST_PASSWD_HOME=/root \
+    MOSAIC_NO_COLOR=1 PATH="$good_bin:/usr/local/bin:/usr/bin:/bin" "${extra_env[@]}" \
+    bash "$ROOT/tools/install.sh" --check --next >"$TMP/$privilege_case.log" 2>&1
+  privilege_status=$?
+  set -e
+  [[ "$privilege_status" -ne 0 ]] || fail_case "P0 accepted unsafe $privilege_case context"
+  grep -q '^\[P0\] FAIL:.*privilege=' "$TMP/$privilege_case.log" \
+    && pass_case "P0 states and rejects $privilege_case privilege context" \
+    || fail_case "P0 did not state $privilege_case privilege mode"
+done
+
+printf '[test] case: P3/P5 reject unsafe owner, group, and mode\n'
+chmod 0777 "$good_prefix/bin/mosaic"
+set +e
+HOME="$good_home" MOSAIC_HOME="$good_mosaic" MOSAIC_PREFIX="$good_prefix" MOSAIC_NO_COLOR=1 \
+  PATH="$good_bin:/usr/local/bin:/usr/bin:/bin" bash "$ROOT/tools/install.sh" --check --next >"$TMP/p3-mode.log" 2>&1
+p3_mode_status=$?
+set -e
+[[ "$p3_mode_status" -ne 0 ]] || fail_case 'P3 accepted mode-0777 CLI'
+grep -q '^\[P3\] FAIL:.*unsafe owner/group/mode' "$TMP/p3-mode.log" \
+  && pass_case 'P3 rejects group/world-writable CLI' || fail_case 'P3 did not attribute unsafe CLI mode'
+chmod 0755 "$good_prefix/bin/mosaic"
+
+for ownership_case in owner group; do
+  wrong_env=()
+  [[ "$ownership_case" == owner ]] && wrong_env+=(MOSAIC_TEST_WRONG_OWNER_PATH="$good_prefix/bin/mosaic")
+  [[ "$ownership_case" == group ]] && wrong_env+=(MOSAIC_TEST_WRONG_GROUP_PATH="$good_prefix/bin/mosaic")
+  set +e
+  env HOME="$good_home" MOSAIC_HOME="$good_mosaic" MOSAIC_PREFIX="$good_prefix" MOSAIC_NO_COLOR=1 \
+    PATH="$good_bin:/usr/local/bin:/usr/bin:/bin" "${wrong_env[@]}" \
+    bash "$ROOT/tools/install.sh" --check --next >"$TMP/p3-$ownership_case.log" 2>&1
+  owner_status=$?
+  set -e
+  [[ "$owner_status" -ne 0 ]] || fail_case "P3 accepted wrong CLI $ownership_case"
+  grep -q '^\[P3\] FAIL:.*unsafe owner/group/mode' "$TMP/p3-$ownership_case.log" \
+    && pass_case "P3 rejects wrong CLI $ownership_case" || fail_case "P3 did not attribute wrong CLI $ownership_case"
+done
+
+chmod 0644 "$good_mosaic/SOUL.md" "$good_mosaic/USER.md"
+set +e
+HOME="$good_home" MOSAIC_HOME="$good_mosaic" MOSAIC_PREFIX="$good_prefix" MOSAIC_NO_COLOR=1 \
+  PATH="$good_bin:/usr/local/bin:/usr/bin:/bin" bash "$ROOT/tools/install.sh" --check --next >"$TMP/p5-mode.log" 2>&1
+p5_mode_status=$?
+set -e
+[[ "$p5_mode_status" -ne 0 ]] || fail_case 'P5 accepted world-readable identity files'
+grep -q '^\[P5\] FAIL:' "$TMP/p5-mode.log" \
+  && pass_case 'P5 rejects world-readable identity files' || fail_case 'P5 did not reject identity mode 0644'
+chmod 0600 "$good_mosaic/SOUL.md" "$good_mosaic/USER.md"
+
+mkdir -p "$good_mosaic/credentials"
+chmod 0755 "$good_mosaic/credentials"
+set +e
+HOME="$good_home" MOSAIC_HOME="$good_mosaic" MOSAIC_PREFIX="$good_prefix" MOSAIC_NO_COLOR=1 \
+  PATH="$good_bin:/usr/local/bin:/usr/bin:/bin" bash "$ROOT/tools/install.sh" --check --next >"$TMP/p5-credentials.log" 2>&1
+credential_status=$?
+set -e
+[[ "$credential_status" -ne 0 ]] || fail_case 'P5 accepted mode-0755 credentials directory'
+grep -q '^\[P5\] FAIL:.*credentials' "$TMP/p5-credentials.log" \
+  && pass_case 'P5 rejects group/world-readable credential storage' \
+  || fail_case 'P5 did not attribute unsafe credential directory mode'
+chmod 0700 "$good_mosaic/credentials"
+
+printf '# framework\n' > "$good_mosaic/AGENTS.md"
+chmod 0666 "$good_mosaic/AGENTS.md"
+set +e
+HOME="$good_home" MOSAIC_HOME="$good_mosaic" MOSAIC_PREFIX="$good_prefix" MOSAIC_NO_COLOR=1 \
+  PATH="$good_bin:/usr/local/bin:/usr/bin:/bin" bash "$ROOT/tools/install.sh" --check --next >"$TMP/p4-tree-mode.log" 2>&1
+framework_mode_status=$?
+set -e
+[[ "$framework_mode_status" -ne 0 ]] || fail_case 'P4 accepted group/world-writable framework path'
+grep -q '^\[P4\] FAIL:.*owner/mode policy' "$TMP/p4-tree-mode.log" \
+  && pass_case 'P4 inventories and rejects unsafe created framework paths' \
+  || fail_case 'P4 did not attribute unsafe created-path mode'
+chmod 0644 "$good_mosaic/AGENTS.md"
+
+printf '[test] case: P4 fails closed when created-path enumeration is incomplete\n'
+real_find="$(command -v find)"
+cat > "$good_bin/find" <<FIND
+#!/bin/bash
+if [[ "\${1:-}" == '$good_mosaic' && "\${2:-}" == '-xdev' && "\${3:-}" == '-print0' ]]; then
+  printf '%s\\0' '$good_mosaic'
+  exit 73
+fi
+exec '$real_find' "\$@"
+FIND
+chmod 0755 "$good_bin/find"
+printf '# hidden unsafe child\n' > "$good_mosaic/AGENTS.md"
+chmod 0666 "$good_mosaic/AGENTS.md"
+set +e
+HOME="$good_home" MOSAIC_HOME="$good_mosaic" MOSAIC_PREFIX="$good_prefix" MOSAIC_NO_COLOR=1 \
+  PATH="$good_bin:/usr/local/bin:/usr/bin:/bin" bash "$ROOT/tools/install.sh" --check --next \
+  >"$TMP/p4-enumeration-failure.log" 2>&1
+p4_enumeration_status=$?
+set -e
+rm -f "$good_bin/find"
+[[ "$p4_enumeration_status" -ne 0 ]] \
+  && pass_case 'P4 rejects an incomplete created-path inventory' \
+  || fail_case 'P4 accepted a partial created-path inventory after find failed'
+grep -q '^\[P4\] FAIL:.*enumeration failed' "$TMP/p4-enumeration-failure.log" \
+  && pass_case 'P4 attributes the failed created-path enumeration' \
+  || fail_case 'P4 did not report failed created-path enumeration'
+chmod 0644 "$good_mosaic/AGENTS.md"
+
+printf '[test] case: persisted required-action failures remain blocking\n'
+for blocked_phase in P4 P6; do
+  node -e '
+    const fs=require("fs"); const p=process.argv[1]; const phase=process.argv[2];
+    const m=JSON.parse(fs.readFileSync(p,"utf8")); m.phaseOutcomes={P4:"committed",P6:"committed"};
+    m.phaseOutcomes[phase]="failed"; fs.writeFileSync(p,JSON.stringify(m)+"\n");
+  ' "$good_mosaic/.install-manifest.json" "$blocked_phase"
+  set +e
+  HOME="$good_home" MOSAIC_HOME="$good_mosaic" MOSAIC_PREFIX="$good_prefix" \
+    MOSAIC_NO_COLOR=1 PATH="$good_bin:/usr/local/bin:/usr/bin:/bin" \
+    bash "$ROOT/tools/install.sh" --check --next >"$TMP/action-$blocked_phase.log" 2>&1
+  status=$?
+  set -e
+  [[ "$status" -ne 0 ]] || fail_case "$blocked_phase action failure returned zero"
+  grep -q "^\[$blocked_phase\] FAIL:.*action reported a required $blocked_phase failure" "$TMP/action-$blocked_phase.log" \
+    && pass_case "$blocked_phase action failure remained blocking in a later --check" \
+    || fail_case "$blocked_phase persisted action failure was not attributed"
+done
+printf '{\n  "lane": "next",\n  "cliVersion": "0.0.50-next.999",\n  "phaseOutcomes": {"P4":"committed","P6":"committed"}\n}\n' > "$good_mosaic/.install-manifest.json"
+
+printf '[test] case: fault injection has no synthetic mutation implementation\n'
+if grep -q '\.selftest-' "$ROOT/tools/install.sh"; then
+  fail_case 'synthetic .selftest mutation path remains in the production fault seam'
+else
+  pass_case 'fault seam is attached only to real P2-P8 action flow (exercised by install-next-lane.test.sh)'
+fi
+
+printf '[test] case: unsafe and overlapping rollback roots fail before mutation\n'
+unsafe_home="$TMP/unsafe-home"
+mkdir -p "$unsafe_home"
+for case_name in root-target home-target overlap-target; do
+  case "$case_name" in
+    root-target) unsafe_mosaic=/; unsafe_prefix="$unsafe_home/.npm-global" ;;
+    home-target) unsafe_mosaic="$unsafe_home"; unsafe_prefix="$unsafe_home/.npm-global" ;;
+    overlap-target) unsafe_mosaic="$unsafe_home/.config"; unsafe_prefix="$unsafe_home/.config/mosaic/prefix" ;;
+  esac
+  before="$(fingerprint "$unsafe_home")"
+  set +e
+  HOME="$unsafe_home" MOSAIC_HOME="$unsafe_mosaic" MOSAIC_PREFIX="$unsafe_prefix" \
+    MOSAIC_TEST_PASSWD_HOME="$unsafe_home" MOSAIC_NO_COLOR=1 PATH="$good_bin:/usr/local/bin:/usr/bin:/bin" \
+    bash "$ROOT/tools/install.sh" --check --next >"$TMP/$case_name.log" 2>&1
+  status=$?
+  set -e
+  after="$(fingerprint "$unsafe_home")"
+  [[ "$status" -ne 0 ]] || fail_case "$case_name unsafe path returned zero"
+  grep -q '^\[P0\] FAIL:.*unsafe context' "$TMP/$case_name.log" \
+    && pass_case "$case_name was rejected by P0" || fail_case "$case_name lacked an attributable P0 failure"
+  [[ "$before" == "$after" ]] || fail_case "$case_name mutated HOME"
+done
+
+symlink_home="$TMP/symlink-home"
+symlink_outside="$TMP/symlink-outside"
+mkdir -p "$symlink_home" "$symlink_outside"
+ln -s "$symlink_outside" "$symlink_home/.config"
+set +e
+HOME="$symlink_home" MOSAIC_HOME="$symlink_home/.config/mosaic" MOSAIC_PREFIX="$symlink_home/.npm-global" \
+  MOSAIC_TEST_PASSWD_HOME="$symlink_home" MOSAIC_NO_COLOR=1 PATH="$good_bin:/usr/local/bin:/usr/bin:/bin" \
+  bash "$ROOT/tools/install.sh" --check --next >"$TMP/symlink-target.log" 2>&1
+status=$?
+set -e
+[[ "$status" -ne 0 ]] || fail_case 'symlink-parent unsafe path returned zero'
+grep -q '^\[P0\] FAIL:.*unsafe context' "$TMP/symlink-target.log" \
+  && pass_case 'symlinked rollback parent was rejected by P0' \
+  || fail_case 'symlinked rollback parent lacked an attributable P0 failure'
+[[ -z "$(find "$symlink_outside" -mindepth 1 -print -quit)" ]] || fail_case 'symlink target was mutated'
+
+printf '[test] case: journal initialization failure is fatal before mutation\n'
+journal_home="$TMP/journal-failure/home"
+mkdir -p "$journal_home/.config/mosaic"
+printf 'journal-sentinel\n' > "$journal_home/.config/mosaic/operator.txt"
+before="$(fingerprint "$journal_home")"
+set +e
+HOME="$journal_home" MOSAIC_HOME="$journal_home/.config/mosaic" MOSAIC_PREFIX="$journal_home/.npm-global" \
+  MOSAIC_TEST_PASSWD_HOME="$journal_home" MOSAIC_INSTALL_STATE_DIR="/proc/mosaic-journal-denied-$$" \
+  MOSAIC_NO_COLOR=1 PATH="$good_bin:/usr/local/bin:/usr/bin:/bin" \
+  bash "$ROOT/tools/install.sh" --cli --next --yes --no-auto-launch \
+  >"$TMP/journal-failure.log" 2>&1
+status=$?
+set -e
+after="$(fingerprint "$journal_home")"
+[[ "$status" -ne 0 ]] && pass_case 'unwritable journal directory failed non-zero' \
+  || fail_case 'unwritable journal directory returned zero'
+grep -q 'cannot create private journal directory' "$TMP/journal-failure.log" \
+  && pass_case 'journal initialization failure was named' \
+  || fail_case 'journal initialization failure lacked a named diagnostic'
+[[ "$before" == "$after" ]] && pass_case 'journal failure occurred before target mutation' \
+  || fail_case "journal failure mutated target HOME (before=$before after=$after)"
+
+if [[ "$failures" -ne 0 ]]; then
+  printf '[test] install state-machine acceptance RED: %d failed assertion(s)\n' "$failures" >&2
+  printf '[test] --check transcript: %s\n' "$TMP/check.log" >&2
+  exit 1
+fi
+printf '[test] installer state-machine acceptance passed\n'

tools/install.sh.sha256

@@ -0,0 +1 @@
+4cd391b0974d3cce6c2a98455420d45bc2a04cb624e3c4bf43a813b8e28693e6  install.sh

tools/verified-installer-fetch.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+# Fetch, authenticate, and execute the exact downloaded installer body.
+set -euo pipefail
+url="${1:?usage: verified-installer-fetch.sh <url> <sha256> [-- installer-args...]}"
+expected="${2:?usage: verified-installer-fetch.sh <url> <sha256> [-- installer-args...]}"
+shift 2
+[[ "${1:-}" != -- ]] || shift
+[[ "$expected" =~ ^[0-9a-f]{64}$ ]] || { echo 'installer expected SHA-256 must be 64 lowercase hex characters' >&2; exit 2; }
+tmp="$(mktemp "${TMPDIR:-/tmp}/mosaic-installer-body.XXXXXX")"
+trap 'rm -f "$tmp"' EXIT
+chmod 0600 "$tmp"
+curl -fsSL "$url" -o "$tmp"
+[[ -s "$tmp" ]] || { echo 'installer fetch returned an empty HTTP-success body' >&2; exit 1; }
+actual="$(sha256sum "$tmp" | awk '{print $1}')"
+[[ "$actual" == "$expected" ]] || { echo "installer SHA-256 mismatch (got=$actual expected=$expected)" >&2; exit 1; }
+status=0
+bash "$tmp" "$@" || status=$?
+rm -f "$tmp"
+trap - EXIT
+exit "$status"

tools/verified-installer-fetch.test.sh

@@ -0,0 +1,64 @@
+#!/usr/bin/env bash
+set -euo pipefail
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+TMP="$(mktemp -d "${TMPDIR:-/tmp}/mosaic-fetch-contract.XXXXXX")"
+trap 'rm -rf "$TMP"' EXIT
+FAKE_BIN="$TMP/bin"; mkdir -p "$FAKE_BIN"
+cat > "$FAKE_BIN/curl" <<'CURL'
+#!/usr/bin/env bash
+set -euo pipefail
+url=""; output=""
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    -o) output="$2"; shift 2 ;;
+    -*) shift ;;
+    *) url="$1"; shift ;;
+  esac
+done
+emit() { if [[ -n "$output" ]]; then cat > "$output"; else cat; fi; }
+case "$url" in
+  fixture://ok)
+    emit <<'SCRIPT'
+#!/usr/bin/env bash
+set -euo pipefail
+printf 'executed:%s\n' "${1:-missing}"
+SCRIPT
+    ;;
+  fixture://empty) : > "$output" ;;
+  fixture://failed) exit 22 ;;
+  *) exit 2 ;;
+esac
+CURL
+chmod 0755 "$FAKE_BIN/curl"
+cat > "$TMP/ok.sh" <<'SCRIPT'
+#!/usr/bin/env bash
+set -euo pipefail
+printf 'executed:%s\n' "${1:-missing}"
+SCRIPT
+ok_sha="$(sha256sum "$TMP/ok.sh" | awk '{print $1}')"
+empty_sha="$(printf '' | sha256sum | awk '{print $1}')"
+
+mkdir -p "$TMP/downloads"
+output="$(TMPDIR="$TMP/downloads" PATH="$FAKE_BIN:$PATH" bash "$ROOT/tools/verified-installer-fetch.sh" fixture://ok "$ok_sha" -- marker)"
+[[ "$output" == 'executed:marker' ]]
+[[ -z "$(find "$TMP/downloads" -mindepth 1 -print -quit)" ]]
+printf '[test] PASS: digest-pinned fetched artifact executes and its temporary body is removed\n'
+
+for row in 'fixture://empty empty-body' 'fixture://failed failed-fetch'; do
+  url="${row%% *}"; name="${row#* }"
+  set +e
+  PATH="$FAKE_BIN:$PATH" bash "$ROOT/tools/verified-installer-fetch.sh" "$url" "$empty_sha" -- marker \
+    >"$TMP/$name.log" 2>&1
+  status=$?
+  set -e
+  [[ "$status" -ne 0 ]] || { echo "[test] FAIL: $name certified success" >&2; exit 1; }
+done
+printf '[test] PASS: failed fetch and HTTP-200 empty body are both rejected\n'
+
+set +e
+PATH="$FAKE_BIN:$PATH" bash "$ROOT/tools/verified-installer-fetch.sh" fixture://ok "${ok_sha/0/1}" -- marker \
+  >"$TMP/mismatch.log" 2>&1
+status=$?
+set -e
+[[ "$status" -ne 0 ]] || { echo '[test] FAIL: digest mismatch was accepted' >&2; exit 1; }
+printf '[test] PASS: fetched installer digest mismatch is blocking\n'

tools/verify-greenfield-expected-red.sh

@@ -0,0 +1,142 @@
+#!/usr/bin/env bash
+# Verify that the detector found exactly the pinned C1 phase verdicts. The
+# fixture is expected to exit non-zero; this verifier is the green CI contract.
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+MANIFEST="${MOSAIC_EXPECTED_RED_MANIFEST:-$ROOT/tools/fixtures/greenfield-expected-red.tsv}"
+CASE="${1:?usage: verify-greenfield-expected-red.sh <case> <log> <fixture-exit>}"
+LOG="${2:?usage: verify-greenfield-expected-red.sh <case> <log> <fixture-exit>}"
+FIXTURE_EXIT="${3:?usage: verify-greenfield-expected-red.sh <case> <log> <fixture-exit>}"
+
+[[ -r "$MANIFEST" ]] || { echo "expected-RED manifest is unreadable: $MANIFEST" >&2; exit 2; }
+[[ -r "$LOG" ]] || { echo "fixture log is unreadable: $LOG" >&2; exit 2; }
+[[ "$FIXTURE_EXIT" =~ ^[0-9]+$ ]] || { echo "fixture exit is not numeric: $FIXTURE_EXIT" >&2; exit 2; }
+
+# Validate the entire pinned contract before selecting one case. Otherwise a
+# deleted case/phase silently disappears from the gate and a one-row manifest
+# can certify any exit-1 transcript.
+expected_cases=(next-git-present main-git-present next-git-absent)
+declare -A allowed_case=(
+  [next-git-present]=1 [main-git-present]=1 [next-git-absent]=1
+)
+declare -A expected_requires=(
+  [next-git-present]=6 [main-git-present]=6 [next-git-absent]=4
+)
+declare -A row_count=() exit_count=() require_count=() forbid_count=() phase_count=() phase_reason_count=() unique_rows=()
+while IFS= read -r raw; do
+  [[ -n "$raw" && "${raw:0:1}" != "#" ]] || continue
+  field_count="$(awk -F '\t' '{print NF}' <<<"$raw")"
+  [[ "$field_count" -eq 3 ]] || { echo "invalid expected-RED manifest row (expected exactly 3 tab fields): $raw" >&2; exit 2; }
+  IFS=$'\t' read -r case_name kind expectation <<<"$raw"
+  [[ -n "${allowed_case[$case_name]:-}" ]] || { echo "invalid expected-RED manifest case: $case_name" >&2; exit 2; }
+  unique_key="$case_name|$kind|$expectation"
+  [[ -z "${unique_rows[$unique_key]:-}" ]] || { echo "duplicate expected-RED manifest row: $raw" >&2; exit 2; }
+  unique_rows[$unique_key]=1
+  row_count[$case_name]=$((${row_count[$case_name]:-0} + 1))
+  case "$kind" in
+    exit)
+      [[ "$expectation" == 1 ]] || { echo "invalid expected-RED exit contract: case=$case_name expected=$expectation" >&2; exit 2; }
+      exit_count[$case_name]=$((${exit_count[$case_name]:-0} + 1))
+      ;;
+    phase)
+      [[ "$expectation" =~ ^(P[0-9])=(PASS|FAIL)$ ]] \
+        || { echo "invalid expected-RED phase disposition: case=$case_name value=$expectation" >&2; exit 2; }
+      phase="${BASH_REMATCH[1]}"
+      phase_key="$case_name|$phase"
+      phase_count[$phase_key]=$((${phase_count[$phase_key]:-0} + 1))
+      ;;
+    phase-reason)
+      [[ "$expectation" =~ ^P0=(.+)$ ]] \
+        || { echo "invalid expected-RED phase reason: case=$case_name value=$expectation" >&2; exit 2; }
+      phase_reason_count[$case_name|P0]=$((${phase_reason_count[$case_name|P0]:-0} + 1))
+      ;;
+    require)
+      [[ -n "$expectation" ]] || { echo "empty expected-RED require row: case=$case_name" >&2; exit 2; }
+      require_count[$case_name]=$((${require_count[$case_name]:-0} + 1))
+      ;;
+    forbid)
+      [[ -n "$expectation" ]] || { echo "empty expected-RED forbid row: case=$case_name" >&2; exit 2; }
+      forbid_count[$case_name]=$((${forbid_count[$case_name]:-0} + 1))
+      ;;
+    *) echo "invalid expected-RED manifest kind: case=$case_name kind=$kind" >&2; exit 2 ;;
+  esac
+done < "$MANIFEST"
+
+for case_name in "${expected_cases[@]}"; do
+  [[ "${exit_count[$case_name]:-0}" -eq 1 ]] \
+    || { echo "expected-RED manifest requires exactly one exit row for case=$case_name" >&2; exit 2; }
+  for phase in P0 P1 P2 P3 P4 P5 P6 P7 P8 P9; do
+    [[ "${phase_count[$case_name|$phase]:-0}" -eq 1 ]] \
+      || { echo "expected-RED manifest requires exactly one $phase disposition for case=$case_name" >&2; exit 2; }
+  done
+  [[ "${phase_reason_count[$case_name|P0]:-0}" -eq 1 ]] \
+    || { echo "expected-RED manifest requires exactly one P0 reason binding for case=$case_name" >&2; exit 2; }
+  [[ "${require_count[$case_name]:-0}" -eq "${expected_requires[$case_name]}" ]] \
+    || { echo "expected-RED manifest require-row population changed for case=$case_name" >&2; exit 2; }
+  [[ "${forbid_count[$case_name]:-0}" -eq 1 ]] \
+    || { echo "expected-RED manifest requires exactly one forbid row for case=$case_name" >&2; exit 2; }
+  expected_total=$((1 + 10 + 1 + expected_requires[$case_name] + 1))
+  [[ "${row_count[$case_name]:-0}" -eq "$expected_total" ]] \
+    || { echo "expected-RED manifest row population changed for case=$case_name" >&2; exit 2; }
+done
+[[ -n "${allowed_case[$CASE]:-}" ]] || { echo "unknown expected-RED verification case: $CASE" >&2; exit 2; }
+
+checks=0
+failures=0
+while IFS=$'\t' read -r case_name kind expectation; do
+  [[ -n "$case_name" && "${case_name:0:1}" != "#" ]] || continue
+  [[ "$case_name" == "$CASE" ]] || continue
+  checks=$((checks + 1))
+  case "$kind" in
+    exit)
+      if [[ "$FIXTURE_EXIT" != "$expectation" ]]; then
+        echo "expected-RED mismatch: case=$CASE fixture_exit=$FIXTURE_EXIT expected=$expectation" >&2
+        failures=$((failures + 1))
+      fi
+      ;;
+    phase)
+      phase="${expectation%%=*}"
+      expected_verdict="${expectation#*=}"
+      last_row="$(grep -E "^\[$phase\] (PASS|FAIL):" "$LOG" | tail -n 1 || true)"
+      actual_verdict="$(printf '%s\n' "$last_row" | sed -n "s/^\[$phase\] \(PASS\|FAIL\):.*/\1/p")"
+      if [[ "$actual_verdict" != "$expected_verdict" ]]; then
+        echo "expected-RED mismatch: case=$CASE phase=$phase got=${actual_verdict:-missing} expected=$expected_verdict" >&2
+        failures=$((failures + 1))
+      fi
+      ;;
+    phase-reason)
+      phase="${expectation%%=*}"
+      expected_reason="${expectation#*=}"
+      last_row="$(grep -E "^\[$phase\] (PASS|FAIL):" "$LOG" | tail -n 1 || true)"
+      actual_reason="${last_row#*: }"
+      if [[ -z "$last_row" ]] || ! grep -Eq -- "^${expected_reason}$" <<<"$actual_reason"; then
+        echo "expected-RED phase reason mismatch: case=$CASE phase=$phase reason=${actual_reason:-missing}" >&2
+        failures=$((failures + 1))
+      fi
+      ;;
+    require)
+      if ! grep -Eq -- "$expectation" "$LOG"; then
+        echo "expected-RED missing required evidence: case=$CASE regex=$expectation" >&2
+        failures=$((failures + 1))
+      fi
+      ;;
+    forbid)
+      if grep -Eq -- "$expectation" "$LOG"; then
+        echo "expected-RED found forbidden evidence: case=$CASE regex=$expectation" >&2
+        failures=$((failures + 1))
+      fi
+      ;;
+    *)
+      echo "invalid expected-RED manifest kind: case=$case_name kind=$kind" >&2
+      exit 2
+      ;;
+  esac
+done < "$MANIFEST"
+
+[[ "$checks" -gt 0 ]] || { echo "expected-RED manifest has no checks for case=$CASE" >&2; exit 2; }
+if [[ "$failures" -ne 0 ]]; then
+  echo "expected-RED verification failed: case=$CASE failures=$failures checks=$checks" >&2
+  exit 1
+fi
+printf 'expected-RED verification passed: case=%s checks=%d\n' "$CASE" "$checks"

tools/verify-greenfield-expected-red.test.sh

@@ -0,0 +1,91 @@
+#!/usr/bin/env bash
+set -euo pipefail
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+TMP="$(mktemp -d "${TMPDIR:-/tmp}/mosaic-expected-red-test.XXXXXX")"
+trap 'rm -rf "$TMP"' EXIT
+
+cat > "$TMP/match.log" <<'LOG'
+[fixture] resolved lane=next package=@mosaicstack/mosaic@next version=0.0.50-next.999
+[fixture] installer_exit=1 done_claims=0
+[SECRET-CONTROL] PASS: seeded canary absent from complete scan population
+[P0] PASS: target=mosaic uid=1001 HOME=/home/mosaic passwd_HOME=/home/mosaic shell=/bin/bash privilege=user arch=x86_64 libc=glibc node=v24.0.0 npm=10.6.2
+[P1] PASS: preflight complete
+[P2] PASS: pinned artifact
+[P3] PASS: absolute_path=/home/test/.npm-global/bin/mosaic version=0.0.50-next.999 equals resolved lane version
+[P4] FAIL: NOT-MEASURED / UNDECLARED: declaration absent
+[P5] FAIL: identity absent
+[P6] FAIL: runtime linking/activation action reported a required failure
+[P7] PASS: no services requested
+[P8] FAIL: shell path absent
+[P9] FAIL: aggregate refusal
+LOG
+
+bash "$ROOT/tools/verify-greenfield-expected-red.sh" next-git-present "$TMP/match.log" 1 >/dev/null
+printf '[test] PASS: matching detector findings make the CI verifier green\n'
+
+sed 's/^\[P0\] PASS:.*/[P0] PASS: arbitrary unconditional success/' "$TMP/match.log" > "$TMP/vacuous-p0.log"
+if bash "$ROOT/tools/verify-greenfield-expected-red.sh" next-git-present "$TMP/vacuous-p0.log" 1 >/dev/null 2>&1; then
+  echo '[test] FAIL: vacuous P0 PASS satisfied the expected-RED contract without identity/context evidence' >&2
+  exit 1
+fi
+printf '[test] PASS: P0 PASS must bind target identity, HOME, shell, privilege, architecture, and runtime reason\n'
+
+sed 's/^\[P4\] FAIL:/[P4] PASS:/' "$TMP/match.log" > "$TMP/drift.log"
+if bash "$ROOT/tools/verify-greenfield-expected-red.sh" next-git-present "$TMP/drift.log" 1 >/dev/null 2>&1; then
+  echo '[test] FAIL: changed P4 verdict did not invalidate the pinned manifest' >&2
+  exit 1
+fi
+printf '[test] PASS: changed phase verdict requires a deliberate manifest update\n'
+
+if bash "$ROOT/tools/verify-greenfield-expected-red.sh" next-git-present "$TMP/match.log" 0 >/dev/null 2>&1; then
+  echo '[test] FAIL: unexpected fixture exit did not invalidate the pinned manifest' >&2
+  exit 1
+fi
+printf '[test] PASS: unexpected fixture exit remains blocking\n'
+
+printf 'next-git-present\texit\t1\n' > "$TMP/shrunk.tsv"
+if MOSAIC_EXPECTED_RED_MANIFEST="$TMP/shrunk.tsv" \
+  bash "$ROOT/tools/verify-greenfield-expected-red.sh" next-git-present "$TMP/match.log" 1 >/dev/null 2>&1; then
+  echo '[test] FAIL: one-row manifest shrink still certified the detector' >&2
+  exit 1
+fi
+printf '[test] PASS: manifest shrink cannot delete the structural contract\n'
+
+manifest="$ROOT/tools/fixtures/greenfield-expected-red.tsv"
+grep -v $'^next-git-present\tphase\tP8=' "$manifest" > "$TMP/missing-phase.tsv"
+if MOSAIC_EXPECTED_RED_MANIFEST="$TMP/missing-phase.tsv" \
+  bash "$ROOT/tools/verify-greenfield-expected-red.sh" next-git-present "$TMP/match.log" 1 >/dev/null 2>&1; then
+  echo '[test] FAIL: missing P8 disposition was accepted' >&2; exit 1
+fi
+printf '[test] PASS: every case requires one P0-P9 disposition\n'
+
+grep -v $'^next-git-present\tphase-reason\tP0=' "$manifest" > "$TMP/missing-p0-reason.tsv"
+if MOSAIC_EXPECTED_RED_MANIFEST="$TMP/missing-p0-reason.tsv" \
+  bash "$ROOT/tools/verify-greenfield-expected-red.sh" next-git-present "$TMP/match.log" 1 >/dev/null 2>&1; then
+  echo '[test] FAIL: missing P0 reason binding was accepted' >&2; exit 1
+fi
+printf '[test] PASS: every case requires one discriminating P0 reason binding\n'
+
+cp "$manifest" "$TMP/duplicate.tsv"
+printf 'next-git-present\tphase\tP3=PASS\n' >> "$TMP/duplicate.tsv"
+if MOSAIC_EXPECTED_RED_MANIFEST="$TMP/duplicate.tsv" \
+  bash "$ROOT/tools/verify-greenfield-expected-red.sh" next-git-present "$TMP/match.log" 1 >/dev/null 2>&1; then
+  echo '[test] FAIL: duplicate phase key was accepted' >&2; exit 1
+fi
+printf '[test] PASS: duplicate structural keys are rejected\n'
+
+cp "$manifest" "$TMP/unknown-case.tsv"
+printf 'invented-case\texit\t1\n' >> "$TMP/unknown-case.tsv"
+if MOSAIC_EXPECTED_RED_MANIFEST="$TMP/unknown-case.tsv" \
+  bash "$ROOT/tools/verify-greenfield-expected-red.sh" next-git-present "$TMP/match.log" 1 >/dev/null 2>&1; then
+  echo '[test] FAIL: unknown case was accepted' >&2; exit 1
+fi
+printf '[test] PASS: unknown case rows are rejected\n'
+
+cp "$manifest" "$TMP/unknown-kind.tsv"
+printf 'next-git-present\toptional\tanything\n' >> "$TMP/unknown-kind.tsv"
+if MOSAIC_EXPECTED_RED_MANIFEST="$TMP/unknown-kind.tsv" \
+  bash "$ROOT/tools/verify-greenfield-expected-red.sh" next-git-present "$TMP/match.log" 1 >/dev/null 2>&1; then
+  echo '[test] FAIL: unknown row kind was accepted' >&2; exit 1
+fi
+printf '[test] PASS: unknown manifest kinds are rejected\n'