fix(#1051 ): track canonical estate registry

fix(mosaic): enforce private brain checkout
fix(mosaic): reject unapproved brain skeleton state
2026-08-05 23:32:23 -05:00 · 2026-08-05 17:19:51 -05:00 · 2026-08-05 17:19:51 -05:00 · 2026-08-05 17:19:50 -05:00 · 2026-08-05 17:19:50 -05:00 · 2026-08-05 17:19:50 -05:00
48 changed files with 7108 additions and 1543 deletions
@@ -79,6 +79,49 @@ Jarvis (v0.2.0) is a self-hosted AI assistant with a Python FastAPI backend and

 ---

+## Per-estate durable agent working memory (#1051)
+
+### Problem and objective
+
+Agent and lane continuity currently accumulates as plain local files with no repository backing. The installer must make a private, per-estate `mosaic-brain` clone at `~/.mosaic` reproducible without authorizing cross-estate access or introducing an independent credential path.
+
+### Normative requirements
+
+1. `MB-REQ-01` (R1): Ensure the target estate's existing `mosaic-brain` can be cloned to `~/.mosaic`; repository creation and live access granting remain broker-mediated.
+2. `MB-REQ-02` (R2/Q1): Derive estate and brain target from the configured target git host through the credential broker's estate registry. A second `brain_repo` authority and host-machine inference are forbidden; an unknown host fails closed with a named diagnosis.
+3. `MB-REQ-03` (R3): Seat access is granted only through `mosaic cred`; callers must never resolve or read a token independently. Live grant verification is gated on MC-CRED-01 implementation.
+4. `MB-REQ-04` (R4): The eventual live postcondition requires `~/.mosaic` to be a `main`-branch git repo with the expected remote and a seat-owned read/write round-trip. This live validation is gated on MC-CRED-01 implementation and cannot be replaced by a clone exit code.
+5. `MB-REQ-05` (R5): The out-of-estate refusal control covers both Git and API resolver axes. Axis disagreement is `indeterminate` failure, never permission; contract tests bind to the broker's four terminal classes and stable reason codes.
+6. `MB-REQ-06` (R6): The brain skeleton excludes `*.token`, `*.key`, `*.pem`, `.env`, and `credentials.json`; credentials remain broker-owned and no error path may print secret material. Arbitrary legacy content is never auto-published from a heuristic denylist: an approved content scanner must bind approval to the exact source snapshot, otherwise the item is retained and reported.
+7. `MB-REQ-07` (R7): Detect existing local lane directories and seat state files, publish approved snapshots into the durable layout without overwrite or deletion, and explicitly report every detected item that cannot be migrated. Automatic source deletion is parked until command-scoped identity propagation and the required clean audit; retained sources are always reported. Lane findings are append-only; `board/` has a named single writer; writes push immediately rather than on a timer.
+8. `MB-REQ-08` (R8): `mosaic doctor` reports missing clone, wrong remote, incomplete write-access evidence, and uncommitted local state. `--fix` repairs the first three only through the approved installer/broker path; it never hand-rolls credential resolution.
+9. `MB-REQ-09`: Retention is ownership-first and archive-only. Every retained artifact requires a named durable owner; absent or non-durable ownership leaves the gate open and blocking. Age and size never authorize deletion.
+10. `MB-REQ-10`: Brain provisioning occupies canonical installer P7 only after the applicable P5 credential postcondition commits; canonical phase numbers are unchanged.
+
+### Current delivery slice
+
+In scope now: estate derivation, secret exclusion, non-destructive migration, doctor reporting/repair orchestration, and red-first tests over all four credential-contract terminal classes. Live grant and live read/write round-trip evidence remain explicitly gated on the working MC-CRED-01 broker and must not be mocked or replaced by independent token lookup.
+
+### Acceptance criteria
+
+1. `AC-MB-01`: Contract tests observe RED before implementation and then distinguish `ok/0`, `refused/10`, `error/20`, and `indeterminate/30`, preserving v1.5 diagnoses including refused `provider-identity-mismatch`/`credential-rejected` and indeterminate `identity-not-measured`/`provider-unavailable`. A scope-forbidden `/user` result with confirmed in-scope repository capability is never represented as a dead credential. `identity-not-found` remains reserved for a future visibility-authorized inventory operation and is not an expected `validate` result.
+2. `AC-MB-02`: Estate resolution uses the configured target git host and one registry; unknown, mismatched, and host-machine-derived inputs fail closed.
+3. `AC-MB-03`: A clean fixture contains the required layout and exact secret exclusions; filename-, content-, binary-, and size-based secret controls remain outside Git without their values appearing in output. Without an approved scanner, even benign legacy content is retained and reported rather than auto-published.
+4. `AC-MB-04`: Migration publishes approved lane-durable and seat-state snapshots into collision-safe archive/ledger paths, retains and reports every source, never overwrites an existing finding, and never deletes by age/size.
+5. `AC-MB-05`: Doctor detects all four R8 defect classes; `--fix` repairs eligible classes through the approved P7/broker seam and leaves unresolved credential-dependent states visible.
+6. `AC-MB-06`: Git-axis and API-axis refusal must both be authoritative `refused` outcomes with matching stable reason codes; any disagreement yields `indeterminate`.
+7. `AC-MB-07`: Independent code review and security review pass at the exact head, and HOMELAB Woodpecker instance `mosaic` is terminal green before integration.
+8. `AC-MB-08`: After reviewed merge to `main`, report only **believed-fixed, pending jarvis validation**; issue #1051 remains open until W-jarvis validates the installed result.
+
+### Constraints and risks
+
+- MC-CRED-01 contract v1.5 is the caller boundary; no independent credential/token lookup is permitted. Identity is established from governed mint-time binding and provider evidence when measurable, never a credential filename. Runtime validation does not widen a least-privilege token merely to make `/user` observable.
+- C1 owns installer phase sequencing. This slice consumes P5/P7 ordering without renumbering or duplicating the phase machine.
+- Lane content is findings, so last-writer-wins is data loss. Append-only names and explicit collision handling are mandatory.
+- A created-but-empty brain beside unbacked local doctrine fails the objective; migration is a primary acceptance gate.
+
+---
+
 ## Compaction Refresh Trust Lifecycle (M1, #827–#830)

 ### Problem and objective
@@ -146,36 +189,6 @@ lands. M0 consists only of these normative requirements, the complete task DAG,
 documentation IA checklist, and the legacy example/profile disposition inventory. Subsequent cards
 are defined in [docs/TASKS.md](./TASKS.md) and must remain one card/one PR.

-### Fleet git identity launch propagation (#1043)
-
-#### Problem and objective
-
-A fleet seat can have a registered per-agent Git credential while its launched runtime process lacks
-`MOSAIC_GIT_IDENTITY`. The credential resolver then cannot select the seat identity reliably, which
-blocks repository operations on fail-closed estates and can fall through to an unrelated identity on
-estates where that refusal is not active. The objective is to make Git identity a deterministic,
-roster-derived part of the generated launch projection and prove it reaches the launched process.
-
-#### Normative requirements
-
-1. `FGI-REQ-01`: Every generated fleet agent projection SHALL declare
-   `MOSAIC_GIT_IDENTITY=<MOSAIC_AGENT_NAME>`; a differing or unsafe identity SHALL fail closed before
-   tmux launch.
-2. `FGI-REQ-02`: The clean `/usr/bin/env -i` pane boundary SHALL pass every variable declared by the
-   generated projection, including `MOSAIC_GIT_IDENTITY`, to the launched runtime process.
-3. `FGI-REQ-03`: A behavioral integration test SHALL set-compare the complete generated projection
-   against the launched process environment. Source-text/string-presence assertions are insufficient.
-4. `FGI-REQ-04`: Verification SHALL include RED-first evidence and a delete-the-subject mutation that
-   removes Git-identity pane propagation and makes the behavioral test fail.
-
-#### Acceptance criteria
-
-1. `AC-FGI-01`: A launched seat process contains every key/value pair declared by its generated
-   environment projection, including the roster-derived Git identity.
-2. `AC-FGI-02`: Missing, unsafe, or split Git identity is rejected before a tmux session is created.
-3. `AC-FGI-03`: Focused launcher and generated-environment tests, repository quality gates,
-   independent review, and the required RED/green/R7 evidence are recorded before push.
-
 ---

 ## Exact Cross-Harness Fleet Communications Contract (#766)
@@ -5,14 +5,14 @@ Generated environment files are rebuildable projections, not an operator-editabl

 ## Launch chain

-| Layer               | Responsibility                                                                                                                                                                     |
-| ------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| Roster              | `fleet/roster.yaml` supplies the agent name, class, supported runtime, model, reasoning, tool policy, workdir, and tmux socket; Git identity is derived from the exact agent name. |
-| Projection writer   | Renders deterministic fleet/agents/<name>.env.generated from the roster.                                                                                                           |
-| Optional local data | Reads a strict, data-only fleet/agents/<name>.env.local; it cannot shadow generated keys.                                                                                          |
-| systemd             | Starts the launcher with env -i and fixed bootstrap data. It does not preload either environment file.                                                                             |
-| session launcher    | Validates generated and local data before it queries, creates, or stops an exact tmux session.                                                                                     |
-| runtime launch      | Derives the fixed mosaic yolo <runtime> argument array from validated roster data, then seeds the runtime contract.                                                                |
+| Layer               | Responsibility                                                                                                                  |
+| ------------------- | ------------------------------------------------------------------------------------------------------------------------------- |
+| Roster              | `fleet/roster.yaml` supplies the agent name, class, supported runtime, model, reasoning, tool policy, workdir, and tmux socket. |
+| Projection writer   | Renders deterministic fleet/agents/<name>.env.generated from the roster.                                                        |
+| Optional local data | Reads a strict, data-only fleet/agents/<name>.env.local; it cannot shadow generated keys.                                       |
+| systemd             | Starts the launcher with env -i and fixed bootstrap data. It does not preload either environment file.                          |
+| session launcher    | Validates generated and local data before it queries, creates, or stops an exact tmux session.                                  |
+| runtime launch      | Derives the fixed mosaic yolo <runtime> argument array from validated roster data, then seeds the runtime contract.             |

 The launcher never `source`s or `eval`s an environment file and never accepts an environment-supplied
 command. `MOSAIC_AGENT_COMMAND`, command/channel overrides, unknown keys, generated-key shadowing,
@@ -24,7 +24,6 @@ secret-like key names, duplicate keys, comments, quoted/export syntax, and unsaf

 ```dotenv
 MOSAIC_AGENT_NAME=<roster name>
-MOSAIC_GIT_IDENTITY=<roster name>
 MOSAIC_AGENT_CLASS=<roster class>
 MOSAIC_AGENT_RUNTIME=<roster runtime>
 MOSAIC_AGENT_MODEL=<roster model hint>
@@ -34,10 +33,8 @@ MOSAIC_AGENT_WORKDIR=<absolute roster work directory>
 MOSAIC_TMUX_SOCKET=<roster socket or empty>
 ```

-`MOSAIC_GIT_IDENTITY` is not independently configurable: it must equal `MOSAIC_AGENT_NAME`, preventing
-split runtime and repository identity authority. The generated launch contract supports `claude`,
-`codex`, `opencode`, and `pi`. mosaic fleet add rejects another runtime before it writes the roster or
-modifies generated, local, or quarantine state.
+The generated launch contract supports `claude`, `codex`, `opencode`, and `pi`. mosaic fleet add
+rejects another runtime before it writes the roster or modifies generated, local, or quarantine state.
 The legacy dogfood stub remains an observability-only canary on its separate `mosaic-factory` socket;
 it has no generated-launch adapter and cannot be added through this path.

@@ -3,12 +3,11 @@
 The launcher consumes validated data, not shell configuration.

 1. Read and validate the canonical roster.
-2. Render deterministic <name>.env.generated data from that roster, including `MOSAIC_GIT_IDENTITY` derived exactly from the roster agent name.
+2. Render deterministic <name>.env.generated data from that roster.
 3. Parse optional <name>.env.local through a strict allowlist.
 4. Reject generated-key shadowing, unknown or sensitive-looking keys, unsafe paths/values, duplicates, malformed lines, shell syntax, and command overrides.
-5. Reject a Git identity that is unsafe or differs from the generated agent name.
-6. Derive the runtime command from validated runtime/model/reasoning data and pass every generated projection entry through the clean process environment boundary.
-7. Target only the exact configured tmux socket and roster session after ownership checks.
+5. Derive the runtime command from validated runtime/model/reasoning data.
+6. Target only the exact configured tmux socket and roster session after ownership checks.

 ## File precedence and ownership

@@ -35,7 +35,6 @@ values, credential material, or command text.

 ```dotenv
 MOSAIC_AGENT_NAME=<roster name>
-MOSAIC_GIT_IDENTITY=<roster name>
 MOSAIC_AGENT_CLASS=<roster class>
 MOSAIC_AGENT_RUNTIME=<roster runtime>
 MOSAIC_AGENT_MODEL=<roster model hint>
@@ -45,9 +44,8 @@ MOSAIC_AGENT_WORKDIR=<absolute roster work directory>
 MOSAIC_TMUX_SOCKET=<roster socket or empty>
 ```

-`MOSAIC_GIT_IDENTITY` is derived from and must equal `MOSAIC_AGENT_NAME`; it is not a separate
-operator-controlled identity authority. The generated launch contract supports only `claude`, `codex`,
-`opencode`, and `pi`. fleet add uses that same runtime authority and rejects any other runtime before it writes the roster or changes
+The generated launch contract supports only `claude`, `codex`, `opencode`, and `pi`. fleet add
+uses that same runtime authority and rejects any other runtime before it writes the roster or changes
 projection, local, or quarantine files. The legacy dogfood stub on its separate `mosaic-factory`
 socket remains an observability canary; it has no generated-launch adapter and cannot be added through
 this projection path.
@@ -1,229 +0,0 @@
-# #1043 — Fleet pane git-identity propagation
-
-## Objective
-
-Ensure a fleet seat's launched runtime process receives its roster-derived `MOSAIC_GIT_IDENTITY`, and lock the complete generated-environment propagation boundary with an enumerated set comparison.
-
-## Tracking
-
- External issue: `mosaicstack/stack#1043`
- Branch: `fix/1043-pane-git-identity`
- Coordinator: `tl-mosaic`
- `docs/TASKS.md`: read-only by project worker contract; not modified.
-
-## Constraints
-
- RED-first bug reproducer is mandatory.
- R7 delete-the-subject mutation must turn the behavioral test red.
- Assert launched-process environment, not source text.
- One push only; do not poll CI after push.
- Run the CI queue guard immediately before push and report its `state=` line as state, not evidence.
- Do not modify a live host launcher or obtain/copy another credential.
- Self-post the PR, verify provider attribution, then stop.
- Final status wording: `believed-fixed, pending jarvis validation`.
-
-## Scope inventory
-
-Re-derived against `origin/main` at `85d2108e`:
-
- Launch consumer: `packages/mosaic/framework/tools/fleet/start-agent-session.sh`
- Behavioral launch test: `packages/mosaic/framework/tools/fleet/test-start-agent-session.sh`
- Generated-environment contract/parser: `packages/mosaic/src/fleet/generated-env-boundary.ts`
- Roster projection producers:
-  - `packages/mosaic/src/commands/fleet.ts`
-  - `packages/mosaic/src/fleet/fleet-reconciler.ts`
-  - `packages/mosaic/src/fleet/fleet-agent-crud.ts`
-  - `packages/mosaic/src/fleet/v1-v2-migration.ts`
- Contract and producer tests discovered by repository search.
- Generated-environment operator/developer docs and their executable documentation contract test.
-
-Discrepancy sent to `tl-mosaic`: current main no longer contains the charter's `PANE_SHELL_SNIPPET`; #772 replaced it with an `/usr/bin/env -i` argv launch boundary, and current generated projections do not declare git identity. Code-read inventory is **NOT MEASURED** behavior.
-
-## Plan
-
-1. Add the process-environment set-comparison regression first and record RED.
-2. Add roster-derived `MOSAIC_GIT_IDENTITY=<agent name>` to the complete generated projection contract.
-3. Validate identity syntax and equality with `MOSAIC_AGENT_NAME`; pass it through the clean pane environment.
-4. Update affected projection tests and generated-environment docs.
-5. Run focused and baseline gates.
-6. Perform R7 by deleting the pane propagation entry, prove RED, restore, and prove GREEN.
-7. Run independent review, remediate, commit, queue guard, one push, self-post PR, verify provider attribution, and stop without CI polling.
-
-## Budget
-
-No explicit token cap was provided. Working cap: one narrow logical unit, no dependency installation unless existing tooling requires it, no unrelated refactor.
-
-## Evidence log
-
-### TDD and mutation evidence
-
- RED-first, repository launcher: `bash packages/mosaic/framework/tools/fleet/test-start-agent-session.sh` exited 64 on pre-fix source with `code=unknown-key key=MOSAIC_GIT_IDENTITY`. The generated seat could not launch with the required declared identity.
- GREEN: the same repository launcher test emitted `ok - start-agent-session generated environment boundary`.
- R7 delete-the-subject: removed only `"MOSAIC_GIT_IDENTITY=$MOSAIC_GIT_IDENTITY"` from the repository launch array; the same test exited 1 with `FAIL: runtime pane omitted or changed generated environment keys: MOSAIC_GIT_IDENTITY`.
- R7 restoration: restored that launch entry; the same test returned green.
- Launcher under test is explicitly `packages/mosaic/framework/tools/fleet/start-agent-session.sh` through the test's `$START`, **not** the stale installed host copy.
-
-### Situational and focused tests
-
- Repository launcher boundary: green, including set comparison of all nine generated projection entries and fail-before-tmux cases for missing, unsafe, mismatched, and local-shadow Git identity.
- Fleet systemd launcher integration: `bash packages/mosaic/framework/systemd/user/test-fleet-units.sh` — green.
- Focused Mosaic Vitest set: 6 files, 311 tests — green.
- `bash -n` on changed shell files — green.
- `git diff --check` — green.
-
-### Baseline gates
-
- `pnpm typecheck` — 45/45 tasks green.
- `pnpm lint` — 25/25 tasks green.
- `pnpm format:check` — green.
- `pnpm test:checkout` — green.
- Repository-wide Vitest under a hermetic current-version npm prefix: Mosaic 81/81 files and 1510/1510 tests green; other workspace test tasks shown green before the framework-shell phase.
- Canonical `pnpm test` is not fully green on this host for unrelated environment-sensitive gates:
-  1. the first two runs exposed the globally installed Mosaic 0.0.48 update banner in three CLI smoke tests expecting empty stderr;
-  2. after isolating that global-version input, the framework wake assertion aborted at the known `#973` Bash `BASH_LINENO` convention check (exit 97; observed `[3 5]`, expected `[3 4]`).
-  No tests were weakened or bypassed; focused changed-surface tests are green. CI remains the canonical clean-environment result and is intentionally not polled after push per charter.
-
-### Independent review
-
- Codex code review first pass: request changes for missing shell rejection-path coverage.
- Remediation: added table-driven missing/unsafe/mismatch/local-shadow launcher cases, each asserting no tmux call.
- Codex code re-review: **approve**, no findings, confidence 0.88.
- Codex security review: risk `none`, no findings, confidence 0.97.
-
-### Acceptance criteria mapping
-
-| Acceptance criterion | Evidence |
-| --- | --- |
-| AC-FGI-01: launched process receives every generated key/value | Repository launcher process-environment `comm -23` set comparison; GREEN and R7 RED evidence above |
-| AC-FGI-02: missing, unsafe, or split identity fails before tmux | Table-driven shell cases plus TypeScript generated-boundary tests |
-| AC-FGI-03: focused/baseline/review evidence recorded | Commands and review outcomes above; host-sensitive full-suite limitations stated explicitly |
-
-### Documentation checklist
-
- PRD updated with #1043 requirements and acceptance criteria.
- Fleet launch runbook, generated-env concept, and generated-env reference updated.
- No API/OpenAPI, sitemap, user publishing target, deployment, or external docs publication change applies.
- `docs/TASKS.md` remains unmodified per its single-writer project contract.
-
-## Round 2 — PR #1073 review 97 remediation
-
-### Review blocker
-
-The launched-process suite was signed-excluded from CI enumeration. Manual GREEN/R7 evidence therefore did not prove a PR workflow could detect regression.
-
-### RED-first and canonical wiring
-
-1. Removed the suite's signed exclusion before adding a CI execution path.
-2. `check-test-enumeration.sh` went RED with exact `UNENUMERATED` output for `test-start-agent-session.sh`: population 49, enumerated 30, excluded 18.
-3. Added both `framework/tools/fleet/test-start-agent-session.sh` and `framework/systemd/user/test-fleet-units.sh` to `@mosaicstack/mosaic`'s canonical `test:framework-shell` chain.
-4. The guard returned GREEN: population 49, enumerated 32, excluded 18, surfaces 45. The systemd suite is outside the guard's tools-only population but now has the same explicit canonical execution disposition.
-
-### Workflow-level R7
-
- Deleted only the pane launch entry `"MOSAIC_GIT_IDENTITY=$MOSAIC_GIT_IDENTITY"`.
- Ran the exact `.woodpecker/ci.yml` test-step command, `pnpm test`, with only a temporary PATH-scoped npm shim reporting the checkout's current 0.0.49 version so the unrelated global 0.0.48 banner could not preempt the shell chain.
- Result: exit 1 at `@mosaicstack/mosaic#test`, with the enumeration guard GREEN followed by `FAIL: runtime pane omitted or changed generated environment keys: MOSAIC_GIT_IDENTITY`.
- Restored the launch entry. The canonical `test:framework-shell` chain then reached both newly wired suites and printed both GREEN markers before the known unrelated #973 host-only `BASH_LINENO` abort.
- An actual provider PR workflow on the intentionally broken mutant is **NOT MEASURED**: the one-push constraint forbids pushing a red mutant and then a repaired head. Local execution proves the exact PR workflow command and dependency chain go RED on the subject deletion; CI on the repaired pushed head remains canonical.
-
-### Workflow population
-
- **DEFINED:** 3 workflows (`ci.yml`, `ci-image.yml`, `publish.yml`).
- **ELIGIBLE for `pull_request`:** 1/3 (`ci.yml`), based on top-level `when:` clauses.
- **REPORTED:** Round-1 exact-head provider read reported 1/1 eligible context (`ci/woodpecker/pr/ci`). Post-remediation-head reported count is **NOT MEASURED** by this seat because CI polling is prohibited; workflow definitions and eligibility did not change.
-
-### Independent remediation review
-
- First Round-2 review identified a CI-image blocker: the newly wired launcher suite used Perl, which the Alpine CI base does not install.
- Replaced the suite's three Perl-only fixture mutations with POSIX/BusyBox-compatible `sed -i` substitutions; production behavior and assertions are unchanged.
- Codex re-review: **APPROVE**, confidence 0.93, no findings.
-
-### Vitest denominator reconciliation
-
-The PR's `311/311` is correct for its explicitly named six-file command at both the original and remediation worktrees:
-
- generated environment boundary: 24
- fleet documentation: 23
- Tess service profile: 6
- fleet regen command: 27
- fleet agent CRUD command: 22
- fleet command: 209
- total: **311**
-
-Review 97 reported 312/312 without naming its six files. That is a different or miscounted population and cannot replace the command-scoped 311 denominator; the PR follow-up will name the exact files and arithmetic.
-
-## Round 3 — Alpine stale-marker portability
-
-### Objective and plan
-
- Replace the GNU-only relative-date fixture with a deterministic POSIX/BusyBox timestamp while preserving the required stale-marker assertion.
- Re-run the launcher suite in the canonical `ci-base:latest` Alpine image, then run applicable repository gates and independent review.
- Update the PR body to name the repeated GNU-host/Alpine-CI portability pattern, run the mandatory queue guard, push once, verify provider attribution, and stop without CI polling.
- Working budget: 8K tokens; scope is one fixture line plus delivery evidence. No production behavior changes.
-
-### RED-first evidence
-
-Before the fix, the canonical CI image command
-`docker run --rm -v "$PWD:/work" -w /work git.mosaicstack.dev/mosaicstack/stack/ci-base:latest bash packages/mosaic/framework/tools/fleet/test-start-agent-session.sh`
-exited 1 at the stale-marker setup with exact BusyBox output
-`touch: invalid date '10 seconds ago'`. The prior fresh-marker assertions had already executed, matching pipeline 2233's failure location.
-
-### Root cause and fix
-
-The test used GNU `touch -d` relative-date parsing although the PR workflow runs on Alpine/BusyBox. The fixture now uses POSIX `touch -t 200001010000.00`, a fixed timestamp that is unconditionally stale; the stale assertion remains mandatory and was not made tolerant of missing timestamp metadata.
-
-### Structural pattern
-
-This is the third GNU-host/Alpine-CI portability defect in the lane: GNU `grep` multi-match counting, Perl-only fixture mutation, and GNU `touch -d` date parsing. The repeated cause is shell suites authored on a GNU host but executed in an Alpine CI image; durable prevention belongs in CI-image execution or portability lint, not assertion weakening.
-
-### GREEN and quality evidence
-
- Focused launcher suite in `ci-base:latest`: exit 0, `ok - start-agent-session generated environment boundary`.
- Canonical test step in `ci-base:latest` with the pipeline's `pgvector/pgvector:pg17` service, readiness check, migration, and `pnpm test`: exit 0; 46/46 Turbo tasks; Mosaic 81/81 files and 1510/1510 tests; Gateway 57 passed/5 skipped files and 629 passed/11 skipped tests; enumeration 49 population / 32 enumerated / 18 signed exclusions / 45 named surfaces.
- The first image-only `pnpm test` attempt lacked the pipeline PostgreSQL service and failed only on connection refusal after the launcher suite was GREEN. The rerun supplied the canonical service precondition and passed.
- Canonical-image baseline: typecheck 45/45 tasks, lint 25/25 tasks, format check GREEN; `git diff --check` GREEN.
- Independent Codex code review: APPROVE, confidence 0.96, 2/2 Round-3 files, no findings.
- Independent Codex security review: risk none, confidence 0.99, 2/2 Round-3 files, no findings.
-
-### Re-derived inventory and denominators
-
- Round-3 git delta: **2/2 files** — launcher suite and task scratchpad; 25 insertions / 1 deletion before evidence finalization.
- Full PR path inventory against `origin/main` at `85d2108e`: **19/19 changed paths**; Round 3 adds no new PR path.
- Workflow definition population: **1/3 pull-request-eligible** (`ci.yml` of `ci.yml`, `ci-image.yml`, `publish.yml`).
- Do not re-litigate the settled 311/312 populations; both are valid for their separately named Tess6 and CRUD-core7 sets.
-
-## Round 4 — bound stale-marker observation
-
-### Objective and plan
-
- Make the heartbeat assertion discriminate an initially stale native marker from a fresh marker without changing the production staleness threshold or shortening the polling window.
- Freeze only the sidecar's numeric observation clock during the stale-fixture arm so elapsed assertion time cannot turn a fresh mutant stale.
- Prove two independent mutants RED: disable production stale-marker detection while retaining the stale fixture; replace the stale fixture with a fresh marker. Restore the tree and prove GREEN in the canonical Alpine image.
- Re-derive the changed-path inventory, run applicable quality and independent review gates, commit with environment-only author/committer identity, queue-guard, push once, verify provider attribution using curl stdin config, and stop without CI polling.
- Working budget: 8K tokens. Scope is the launcher test and its scratchpad evidence; production launcher behavior remains unchanged.
-
-### Root cause and bounded observation
-
-The 30 × 0.1-second assertion window overlaps the production `now - marker > interval * 2 + 1` threshold at interval 1. Depending on second boundaries and load, a fresh marker can age past the threshold before the assertion ends. A focused pre-fix fresh-mutant attempt returned RED while Review 101's full-suite run returned GREEN; the differing result is itself timing dependence, not a discriminating assertion.
-
-The test now supplies a fixed numeric epoch only to the stale-fixture sidecar. Its real marker mtime is still read from the filesystem, but assertion runtime cannot advance `now`. Date formatting still delegates to the image's real `/bin/date`. Neither the production threshold nor the 30 × 0.1-second polling window changed.
-
-### Two-mutant RED / restored GREEN
-
-All three runs used `git.mosaicstack.dev/mosaicstack/stack/ci-base:latest`:
-
-1. **Stale-detection mutant RED:** replaced only the production stale-age predicate with `false` while retaining the fixed stale marker; suite exit 1 with `FAIL: heartbeat sidecar did not resume after native marker became stale or absent`.
-2. **Fresh-marker mutant RED:** replaced only `touch -t 200001010000.00` with fresh `touch`; suite exit 1 with the same failed stale-resumption assertion. The fixed observation epoch kept the mutant fresh throughout all 30 polls.
-3. **Restored tree GREEN:** suite exit 0 with `ok - start-agent-session generated environment boundary`.
-
-### Re-derived inventory
-
- Round-4 delta: **2/2 files** — launcher test plus task scratchpad; production launcher delta is empty.
- Full PR inventory against `origin/main`: **19/19 paths**; Round 4 adds no path.
- Production stale threshold remains `now - marker > iv * 2 + 1`; assertion polling remains 30 × 0.1 seconds.
- Review 101's confirmed enumeration/workflow/CI and attribution evidence is accepted without re-polling or re-derivation.
-
-## Residual risk
-
- Landing on `main` does not update the currently installed host launcher. Host framework installation/reseed and Jarvis live-seat validation are separate downstream events.
- Canonical CI result is pending and will not be polled by this seat.
@@ -0,0 +1,115 @@
+# #1051 — per-estate mosaic-brain installer
+
+Last updated: 2026-08-05
+
+## Objective
+
+Codify estate-derived, repository-backed `~/.mosaic` support with secret exclusions, non-destructive migration, doctor diagnostics/fixes, and credential-contract terminal-class handling. Live broker grants and live read/write round-trips remain gated on MC-CRED-01.
+
+## Sources and bindings
+
+- Provider issue: HOMELAB `git.mosaicstack.dev`, `GET /api/v1/repos/mosaicstack/stack/issues/1051`, `application/json;charset=utf-8`.
+- Issue requirements: R1–R8 read directly on 2026-08-05.
+- MC-CRED caller contract: v1.5, SHA-256 `4cecba3386b37431d4a075205c6dfe43555c7673922fed61b84f43cac1a6ae92` at the 2026-08-05 re-derivation. Earlier moving bindings were v1.5 `710d22d61a93a4b9c70fc55506a023a675a110417fa7a6e72dc051c0d9fe8237`, v1.4 `27f20158561ae8292f3bfc926b5e97f398de93db6a1cf65fcc215d08811d39af`/`d12ad4595b7aef078e392988a07ab5cb00244440775c9c733dc825746d7ac67b`, and v1.3 `8cfa4853d2b0b0e8cc9e792fa8411310e16d7704c06e0af9d9a57155131d8086`.
+- Fleet doctrine: SHA-256 `026b43322e0551ef15b646a9f30d3a6aef58c662a810b732be2a03b1ecf7d36e` at intake.
+- Intake base was HOMELAB provider `next` = `4df478cdd150fdf8d52ea109f02ade5d85017acd`; `main` = `5916aeefd6ed12bcac086c6834c7f6c4ae38e1bc`. On 2026-08-05 `mos-claude` ruled that L0 trunk-based gate 15 requires all three lanes to retarget to `main`; `next` remains a non-merging integration branch. Never weaken or patch `pr-merge.sh`.
+
+## Scope
+
+### In now
+
+- R2/Q1 target-host estate derivation using one registry.
+- R5 both-axis refusal parity and disagreement failure.
+- R6 exact secret exclusions and no secret-bearing diagnostics.
+- R7 detection plus non-destructive, collision-safe migration/reporting.
+- R8 doctor checks and approved-seam fix orchestration.
+- Red-first tests over all four contract terminal classes and stable reason codes.
+
+### Gated / excluded
+
+- R3 live grant: waits for working MC-CRED-01.
+- R4 live seat-owned read/write round-trip: waits for working MC-CRED-01.
+- No independent token lookup, grant helper, or shared-credential fallback.
+- No phase renumbering; C1 owns the phase machine and provides the P5→P7 seam.
+- No age/size reaping or deletion.
+
+## Owner authority ruling and resolver seam
+
+- Binding addendum: `/home/hermes/agent-work/tl-mosaic/CHARTER-MB-BRAIN-01-ADDENDUM.md`; re-read after compaction.
+- HOMELAB durable lane-archive owner and user-namespace brain owner are the human provider account selected by local estate policy (operator ruling: `jason.woltje`) with a required GLPI queue as the standing remediation process. The brain target is therefore `<policy-owner>/mosaic-brain` on the estate host, not `<installer-source-org>/mosaic-brain`. Framework source remains operator-agnostic: the actual login and queue are local policy, not hardcoded open-source context.
+- Provider lookup is anonymous because the ruled owner is public. It requires exact allowlisted login plus a same-invocation public known-good control, private 404 control, and generated absent 404 control. It sends no Authorization header and never widens token scope.
+- Provider `active` is deliberately ignored: non-admin reads return false for demonstrably active accounts. Resolvability + exact login + public visibility are the gate.
+- Private and absent principals both return anonymous 404. The fail-closed reason is `owner-not-resolvable`, never owner-not-found.
+- Caller `owner` strings and `validated=true` are ignored. Migration consumes only an injected source-of-truth resolver result. Owner grammar is NFKC-stable, ASCII allowlisted, exact-policy matched, and mission-seat class is excluded.
+
+## Plan
+
+1. Pre-register acceptance tests and observe each requirement RED for its own missing behavior.
+2. Commit the red tests before implementation.
+3. Implement a narrow brain provisioning/doctor helper that consumes broker JSON outcomes and the shared estate registry without credential resolution.
+4. Implement safe migration and exact brain skeleton/ignore policy.
+5. Integrate the helper into C1's P7 seam and `mosaic doctor` after C1 lands/rebase.
+6. Run focused, package, installer, lint, typecheck, format, and situational security tests.
+7. Run independent code and security reviews in parallel; remediate and re-review.
+8. Push after HOMELAB queue guard, open the reviewed PR to `main`, and preserve merge order C1 → MC-CRED → MB-BRAIN. Do not modify the merge guard; `next` is non-merging integration only.
+9. Re-take CI measurement at the rebased exact head; do not rework code solely because base evidence moved.
+
+## Acceptance interpretation registered before results
+
+- `ok/0`: complete authoritative evidence only.
+- `refused/10`: complete authoritative denial only.
+- `error/20`: local contract/control failure; never reinterpret as denial.
+- `indeterminate/30`: incomplete/disagreeing evidence; fail closed, never resolve permissively.
+- Both Git and API axes must return authoritative `refused` with the same stable reason code for R5. Any axis disagreement is `indeterminate`. A provider `/user` login mismatch is first-class `provider-identity-mismatch`; credential filenames never establish principal identity.
+- Migration publication requires the durable object to contain the approved snapshot and no overwrite. Automatic path-based source deletion is parked; every source is retained and reported.
+- Secret exclusion is tested through exact ignore rules, nested secret-shaped paths, bounded UTF-8 content controls, and an approved-scanner gate bound to the exact source snapshot. Without an approved scanner, even benign content is retained and reported rather than committed.
+
+## Budget
+
+No explicit token ceiling was supplied. Working cap: 55K tokens for implementation/review and 3 focused remediation attempts per failure class. Reduce optional refactoring and documentation breadth before touching required acceptance scope.
+
+## Risks
+
+- C1 and MC-CRED branches have not merged into `main`; integration edits must wait for their exact interfaces or be confined to stable contract seams.
+- A broker runtime test before MC-CRED lands would either fail for an irrelevant reason or pressure a hand-rolled workaround; contract fixtures are allowed, live capability claims are not.
+- Migration can lose data through overwrite, cross-device move failure, or partial copy. Implementation must stage, verify resulting bytes, and retain/report source on incomplete transfer.
+- `~/.mosaic` is a git repo, while current working state may live under multiple local roots; detection must be explicit and cannot treat age/size as ownership.
+
+## Progress / evidence
+
+- [x] Charter receipt accepted by `tl-mosaic`.
+- [x] Issue #1051 R1–R8 read directly from provider.
+- [x] Contract re-derived through v1.3, moving v1.4, and v1.5 before R5 integration. v1.5 separates in-scope repository capability from `/user` identity measurement: 401 is `credential-rejected`/refused, 403/404 may become `identity-not-measured` only after in-scope capability succeeds, and 200 login mismatch is refused. `identity-not-found` is not reachable from `validate`.
+- [x] C1 P5→P7 seam receipt read; no brain implementation is in C1.
+- [x] RED acceptance set committed at `cf11c6c86abae073d8b02b4014cd5447ba67f12a`; author and committer read back as `be-coder-07` and branch reachability was independently verified by `tl-mosaic`.
+- [x] Moving-contract REDs observed independently for v1.4 mismatch, R8 prerequisite ordering, owner resolver seam/allowlist, tracked skeleton/no-follow behavior, runtime observation/publication, and provider owner resolution.
+- [x] Focused implementation includes secure migration, v1.5 write-differential/subject binding, production Git+API refusal parity, provider-backed durable owner resolution that ignores non-admin `active`, required GLPI standing-process policy, P7 provision orchestration, an internal installer command, and installed `mosaic doctor` wiring. Latest focused result: 97/97 (secure config 4, store 45, runtime 19, owner resolver 16, provision 5, provision command 3, installed doctor 5).
+- [x] MC-CRED added the required canonical reverse registry seam `ParsedCredentialEstateRegistry.resolveByHost()`; the 32-line permissive shim was removed. After exact-head CI proved the cross-PR source dependency was absent, the provider-fetched canonical registry implementation, DTO dependencies, and registry tests were tracked byte-for-byte on this branch so a fresh checkout validates the real seam rather than a stub. A later rebase onto merged MC-CRED should recognize those identical files as upstream.
+- [x] Identity gotcha measured: inline `MOSAIC_GIT_IDENTITY=be-coder-07` controls credential resolution but does not override `user.name`/`user.email` inherited from the linked worktree common-dir config (`coder-mos1`). The first local P7 RED commit was immediately amended before push with command-scoped `GIT_AUTHOR_*` + `GIT_COMMITTER_*`; resulting author and committer both read back as `be-coder-07`. Every subsequent authoring command must carry both identity sets and be verified.
+- [x] R6 migration reports filename- or content-secret-shaped files without copying them; arbitrary legacy content requires an approved scanner bound to the exact source snapshot, and production currently retains/reports when no approved scanner is configured. `.gitignore` is canonical allowlisted content only: an existing noncanonical regular file fails closed and is never merged into publication. Symlinked `.gitignore`, layout directories, and nested migration destinations fail closed; a dirty checkout blocks provisioning before skeleton publication. The brain root is principal-owned mode `0700` before clone and after clone, all memory-bearing layout directories are mode `0700` even under umask `0022`, and doctor reports owner-accessible roots as hard unsafe findings.
+- [x] Provider owner lookup uses manual redirect handling, a five-second abort signal, strict JSON content type/shape, and an incrementally enforced 256 KiB response ceiling.
+- [x] Security-critical owner policy/registry reads have direct controls for principal UID ownership, file/ancestor permissions, and descriptor-safe regular-file reads.
+- [x] Automatic source deletion is parked per the shared-Git-identity governance ruling; remotely reachable snapshots still leave and report every source.
+- [x] Multi-host push-on-write uses an isolated temporary Git index populated from approved in-memory blobs rather than pathname re-reads, verifies each committed blob ID, the exact changed-path allowlist, and both author/committer trailers before push, then reconciles only approved paths into the real checkout index. Real-repository controls prove a clean checkout remains clean, a concurrent non-fast-forward fetch/rebase/push remains clean and preserves both findings, destination-path substitution cannot change committed bytes, and unrelated pre-staged secret-shaped content remains staged but never enters the published commit.
+- [x] Doctor Git observations preserve three states: `clean`, `dirty`, and `unmeasurable`; failed remote, branch, or status measurements emit hard `brain-git-state-indeterminate` findings rather than mismatch or ready. The boolean-literal guard sweep covered all MB-BRAIN production files in the 20-file PR population: its only remaining `=== false` guard is the non-nullable `isAbsolute()` predicate; no nullable boolean measurement guards remain.
+- [x] Author-run Review 10 and focused 88/88 evidence were declared void when blocker fixes changed the head; neither is an independent gate pass.
+- [ ] Installer shell P7 invocation after C1 + MC-CRED integration; production command is registered but the C1 shell has not yet called it.
+- [ ] Implementation green on merged dependency base.
+- [ ] Independent code review.
+- [ ] Independent security review.
+- [ ] HOMELAB CI terminal green at exact head.
+- [ ] Reviewed PR retargeted to `main` after C1 and MC-CRED; `next` remains non-merging integration only.
+
+## Exact-head CI dependency remediation
+
+- Pipeline `#2222` at `a50b5a6b` ran the sole pull-request-eligible workflow (`ci`, 1/3 defined workflows) and failed `typecheck` with two `TS2307` errors before lint, format, or tests could execute.
+- History establishes that the imports are intentional: commit `2451c2f` introduced both consumers, while the contemporaneous registry-seam report explicitly called the local 32-line implementation a disposable scaffold and required MC-CRED's canonical parser. This was a deliberate cross-PR dependency, not a wrong import or forgotten shim add.
+- RED-first root typecheck reproduced the two missing-module errors. The fix tracks the provider-fetched MC-CRED registry, its two DTO dependencies, its unit test, and the result DTO dependency. Three DTO files remain byte-identical to `fbff4ffa`; author review found that the canonical parser accepted a trailing-slash origin which MB-BRAIN consumers concatenate into double-slash URLs, so the parser and test are intentionally hardened here pending propagation to MC-CRED.
+- R7 removed the tracked registry module and root typecheck returned RED with three missing-module errors (the two production consumers plus the registry unit test); restoring the same SHA-256 returned typecheck to 45/45 tasks.
+- With the suppressing typecheck failure removed, lint ran 25/25 tasks and formatting passed. Full tests actually ran: 1,607/1,614 passed; the seven failures are the four pre-registered P7 integration tests intentionally held for C1/MC-CRED integration plus the three previously disclosed ambient update-banner CLI smoke failures. No test was weakened. Build ran 25/25 tasks.
+- Author review's trailing-slash finding was reproduced RED (`https://git.example.invalid/` accepted), then fixed by requiring the configured source to equal `URL.origin`; the control reran GREEN. Security review reported risk `none` with zero findings; final code re-review remains required after remediation.
+- This is a second instance of the `#1068` suppression class: an early integrity failure prevented every downstream stage carrying behavioral evidence from running while the workflow's aggregate failure looked like a completed check. Workflow reordering remains `#1068` scope and is not changed here.
+
+## Completion language
+
+After reviewed merge to `main`, only: **believed-fixed, pending jarvis validation**. Issue #1051 remains open until W-jarvis validates the installed result.
@@ -1,99 +0,0 @@
-# PR merge squash message field
-
- **Charter:** `/home/hermes/agent-work/CHARTER-PRMERGE-MESSAGE-FIELD.md`
- **Owner:** `be-coder-08`
- **Branch:** `fix/pr-merge-message-field`
- **Base:** remote `main` / local `origin/main` at `85d2108e4ed15c744ad3b87a5b629e7b2d39405a`
- **Estate:** HOMELAB tooling shared by HOMELAB and USC
-
-## Objective
-
-Add an optional, identity-checked Gitea squash message to `pr-merge.sh` so genuine multi-author PRs retain non-poster branch authors without weakening hardcoded squash behavior.
-
-## Binding requirements
-
-1. `Do` remains hardcoded to `squash`; no provider/repository default may select merge style.
-2. A verified trailer uses a PR commit's linked `author.login` and that same commit's author email. No `/users/{login}` primary-email lookup occurs. Recorded rationale: this asks only what the provider can answer.
-3. A commit with `author.login` null blocks before merge, prints both the null provider fact and commit email fact, and names the escalation principal.
-4. The BLOCK arm must be observed firing; a normal canonical single-author API payload remains explicit squash plus its reviewed `head_commit_id`.
-5. Every provider mutation is read back from the provider; no real PR is merged during tests.
-
-## Derived interface decisions
-
- Add `--co-author-trailers` rather than accepting arbitrary message text. The wrapper enumerates PR commits and constructs trailers, making an unchecked `Co-authored-by` line unexpressible.
- Require `--escalate-to PRINCIPAL` with `--co-author-trailers`, so the BLOCK diagnostic always names a principal rather than a generic role.
- Do not expose `MergeTitleField` separately. When trailers exist, set it from the provider PR title and set `MergeMessageField` only to construction-generated trailers. This preserves one provider source for the title and avoids an unrelated caller-controlled degree of freedom.
- Preserve first-commit order and emit one trailer per distinct non-poster `author.login`, using that first linked commit's own email.
-
-## Canonical delivery plan
-
-1. Port the capability into the installed source of truth, `packages/mosaic/framework/tools/git/pr-merge.sh`; do not retain `infra/fleet/tools/git` as a second copy.
-2. Preserve canonical `--expect-head`, exact head branch/repository/SHA queue inspection, Gitea atomic head pinning, GitHub `--match-head-commit`, and delete-after-merge semantics.
-3. Do not port the deployed-only `--skip-queue-guard` bypass. Add the focused harness to the canonical framework-shell suite and re-establish RED/GREEN on the packaged baseline.
-4. Deliver through a reviewed package release followed by `mosaic update` with its default framework reseed. The installer snapshots, manifest-syncs framework-owned `tools/**`, and rolls back on failure.
-5. Before either estate relies on the change, require installed/package hash equality, `MergeMessageField` presence, and a green focused harness. Release/reseed ownership is currently unassigned and blocks activation after source merge.
-
-## Evidence
-
- RED against the byte-identical deployed baseline (`sha256 08a65e8584c5…`): rc 1 with eight named failures. The wrapper rejected `--co-author-trailers`; the null-login path emitted none of the required BLOCK facts/principal; and both verified/ordinary API paths failed the stdin-config credential assertion (ordinary path exposed the fixture token through curl argv). Log: `/home/hermes/agent-work/be-coder-08/evidence/prmerge-message-field-red.log`.
- GREEN on the deployed-baseline candidate: verified linked multi-author payload, null-login BLOCK, required named principal, explicit squash, stdin-config token transport, and absence of `/users` lookup all passed. Log: `/home/hermes/agent-work/be-coder-08/evidence/prmerge-message-field-green.log`.
- RED against canonical packaged baseline `c581ef48…`: rc 1 with 32 assertions. It rejects the new option, and the first harness version did not satisfy canonical head branch/repository/SHA metadata. Log: `/home/hermes/agent-work/be-coder-08/evidence/prmerge-packaged-baseline-red.log`. The port adapts the fixture rather than weakening canonical head controls.
- Provider capability probe against `git.mosaicstack.dev`: authenticated `be-coder-08` POST to deliberately nonexistent PR `2147483647` with both message fields returned JSON HTTP 404; the unauthenticated same request returned JSON HTTP 401 (not the charter's predicted 403). The authenticated-vs-unauthenticated differential proves write authorization resolved while no mergeable subject existed. `tl-mosaic` ruled the literal non-load-bearing: preserve the observed 404/401 pair and do not manufacture a 403 case. No cause was inferred and no real PR was targeted.
- Provider-generated trailer behavior is not treated as exclusive or absent. The wrapper's VERIFIED/BLOCK decision binds each requested non-poster trailer to commit `author.login` plus that commit's email; it does not assume `MergeMessageField` is the squash's only trailer source. The poster is omitted from the constructed list because the resulting squash author already records the poster; any additional provider-generated trailer is outside this change's unmeasured mechanism.
- An early candidate SHA-256 `5de32876990e4f26920448cb3220cc7f1146d558b4dd2bc1ee1a2abee2f2cbe6` passed the initial harness, then author-side review found credential-fallback and argv-exposure defects. The live deployed wrapper was atomically restored to baseline SHA-256 `08a65e8584c52c6d41ea1c686f8b95585c21e4b37320a2447eba09359a0e02c1`; the remediated candidate remains only in the worktree.
-
-## Remediation and current review state
-
-1. Token and Basic Auth now use stdin curl configuration, not argv. PR title, contributor email, and the JSON payload also remain out of child argv.
-2. Each credential attempt binds commit inspection and merge. A token failure during either inspection or mutation causes Basic fallback to repeat inspection before mutation; the payload pins the inspected `head_commit_id`.
-3. Focused tests cover token-resolution fail-closed behavior, both HTTP-401 fallback seams, metadata/credential argv absence, null-login BLOCK, explicit squash, canonical reviewed-head binding, unchanged ordinary payload, and retained log-safe provider diagnostics. Token-resolution RED: `/home/hermes/agent-work/be-coder-08/evidence/prmerge-token-resolution-red.log`.
-4. Codex review rounds 3–5 requested retained provider error text, log-safe provider diagnostics, fail-closed credential fallback, stable value-option parsing, and PR-title trailer-injection prevention. These are remediated with regression assertions. A post-remediation independent review is still required.
-5. **Accepted linkage limitation:** `author.login` resolution proves that the commit address maps to a registered provider account. It does not prove that the named principal authored the commit because Git author metadata is self-asserted. This gate checks attribution linkage, not authorship; commit signing is out of scope and currently unadopted. Coordinators explicitly ruled that this does not add a third state.
-6. Codex's sandbox could not execute the harness because its checkout was read-only; that environmental limitation is recorded separately from host-side test results.
-
-## Disposable provider fixture acceptance
-
- Use a retained scratch repository only, with two branch authors and `author != committer` on at least one commit.
- Arm A supplies a message-field trailer for one non-poster; record whether that value lands without forcing the partial-pair result into under-specified `APPENDS`/`REPLACES` labels. Demonstrate an absence control.
- Arm B includes a registered trailer for a different non-poster on a branch commit; record whether it survives or drops. Verify identity through an existing commit whose `author.login` resolves and demonstrate an absence control.
- Parse landed trailers key-agnostically with `^[A-Za-z-]+-[Bb]y:` and record generated poster pair presence/absence plus resulting poster attribution.
- Record `/users/<login>` status and raw email only as non-gating estate telemetry. Never read `active`, `visibility`, or any profile field as an identity gate.
- Use distinct principals: poster `be-coder-08`, merger `Mos`, Arm A `be-coder-07`, and Arm B `be-coder-06`. Capture every trailer-shaped line verbatim and in order. Zero trailer lines means the generator did not fire and the run is `VOID`, not evidence that either arm dropped.
- Report the same read-back evidence to `mos-claude` on socket `default` and `tl-mosaic` on socket `mosaic-fleet`. Report values rather than mechanism inferences and stop on any poster-attribution regression.
-
-## Fixture preflight
-
- Retained public repository: `mosaicstack/prmerge-trailer-fixture`; PR `#1`, posted by `be-coder-08` and reserved for merge by `Mos`.
- Existing `mosaicstack/stack` commits resolve `be-coder-07` and `be-coder-06` through `author.login`; exact addresses are `[email protected]` and `[email protected]`.
- Non-gating HOMELAB telemetry for authenticated reader `be-coder-08`: `/api/v1/users/be-coder-06` returned HTTP 200 with raw `email` value `[email protected]`.
- Provider preflight showed PR commit enumeration is newest-first. A new RED test proved that deriving `head_commit_id` from the final array element selected the wrong commit. The candidate now reads `.head.sha` from the authenticated PR endpoint before enumeration, verifies it appears in the commit set, and atomically pins that SHA in the explicit squash payload. RED: `/home/hermes/agent-work/be-coder-08/evidence/prmerge-head-order-red.log`.
- Fixture PR head `f6ba6e5105031fa21f5ff7bd8e4379d99c16e1de` has `author.login=be-coder-07`, `committer.login=be-coder-08`, and branch-message trailer `Co-authored-by: be-coder-06 <[email protected]>`.
-
-## Fixture result
-
- `Mos` merged retained fixture PR `#1` through staged candidate SHA-256 `60e779a85fd13b729d859ea7c986d1e9b1641b97991611329226c1b3113ffb6e`; resulting squash commit: `3f550715d9bc716426fd355a65fe997b3a90fa7d` with one parent.
- Provider read-back: poster/commit author `be-coder-08`, committer/merger `Mos`. The run is non-void.
- Trailer-shaped lines, verbatim and in order:
-  1. `Co-authored-by: be-coder-07 <[email protected]>`
-  2. `Co-authored-by: be-coder-08 <[email protected]>`
- Arm A supplied field value (`be-coder-07`) landed. Arm B branch trailer (`be-coder-06`) dropped. Both fabricated absence controls remained absent. No `Co-committed-by:` line landed.
- The candidate payload construction explicitly excludes the poster and supplied only the Arm A `be-coder-07` line. Therefore the landed poster line was provider-generated, not candidate-composed. The raw result supports `FIELD LANDS`, `BRANCH DROPS`, and `POSTER GENERATED`; it does not support a claim that candidate code supplied the poster. Evidence: `/home/hermes/agent-work/be-coder-08/evidence/prmerge-fixture-readback.log` and the retained provider object.
- Retained fixture PR `#2` measured the N=2 shape needed by `#1030`: supplied `be-coder-07` then `be-coder-06`; both landed in that order, followed by the provider-generated poster line. No truncation or dedup occurred at N=2. Resulting squash: `39db9d13aed0…`.
-
-## Current hold point
-
-PR `mosaicstack/stack#1066` is open. Its first frozen head `f4b162fa…` was terminal-green in Woodpecker `mosaic` pipeline `#2225`, but that evidence becomes stale when the canonical port moves the head. The deployed wrapper remains baseline `08a65e85…`; no manual copy will occur. Canonical port tests, commit amendment, rebase, one guarded force-with-lease, exact-head CI, and new independent review remain. Even after source merge, activation remains blocked on an assigned package-release/reseed owner and installed-byte read-back.
-
-## Security review 96 remediation
-
-Exact reviewed predecessor head: `1ceb11058f64dd7f4a817ceb2124f980a1c4dd23`.
-
-RED-first focused harness produced 10 named failures: all curl calls lacked size/time/connect bounds; raw ESC email reached mutation; oversized and stalled curl failures were discarded and reached mutation; nonempty Basic output with resolver rc 91 authorized mutation.
-
-Security remediation:
-
- Removed the cross-principal HTTP-401 Basic fallback. Both inspection-401 and merge-401 paths now refuse without Basic resolution or mutation; `get_gitea_basic_auth` references in the merge subject are 0.
- Applied `--max-filesize`, `--max-time`, and `--connect-timeout` to all 3/3 provider curl sites and fail closed on curl transport rc at all 3/3 sites.
- Required linked email bytes to be ASCII and printable before constructing `MergeMessageField`; guarded construction sites 1/1.
-
-GREEN: message-field, exact-head, empty-UID/API, queue branch/repository/SHA, bash syntax, ShellCheck, and diff check pass. R7 total-removal mutants went RED: email guard 3 rows; bound switches 1 row; transport-rc guards 4 rows; HTTP-401 refusal 3 rows. R7 bound: mutants prove total removal only; explicit denominators above prove site coverage.
@@ -112,7 +112,6 @@ EOF
  chmod 700 "$AGENT_HOME/fleet/agents"
  cat > "$AGENT_HOME/fleet/agents/$AGENT_NAME.env.generated" <<EOF
 MOSAIC_AGENT_NAME=$AGENT_NAME
-MOSAIC_GIT_IDENTITY=$AGENT_NAME
 MOSAIC_AGENT_CLASS=code
 MOSAIC_AGENT_RUNTIME=pi
 MOSAIC_AGENT_MODEL=
@@ -97,7 +97,7 @@ is_sensitive_key() {

 is_generated_key() {
  case "$1" in
-    MOSAIC_AGENT_NAME|MOSAIC_GIT_IDENTITY|MOSAIC_AGENT_CLASS|MOSAIC_AGENT_RUNTIME|MOSAIC_AGENT_MODEL|MOSAIC_AGENT_REASONING|MOSAIC_AGENT_TOOL_POLICY|MOSAIC_AGENT_WORKDIR|MOSAIC_TMUX_SOCKET) return 0 ;;
+    MOSAIC_AGENT_NAME|MOSAIC_AGENT_CLASS|MOSAIC_AGENT_RUNTIME|MOSAIC_AGENT_MODEL|MOSAIC_AGENT_REASONING|MOSAIC_AGENT_TOOL_POLICY|MOSAIC_AGENT_WORKDIR|MOSAIC_TMUX_SOCKET) return 0 ;;
    *) return 1 ;;
  esac
 }
@@ -114,7 +114,6 @@ validate_generated_value() {
  local value="$2"
  case "$key" in
    MOSAIC_AGENT_NAME) safe_agent_name "$value" || fail_env unsafe-agent-name "$key" "$value" ;;
-    MOSAIC_GIT_IDENTITY) safe_agent_name "$value" || fail_env unsafe-git-identity "$key" "$value" ;;
    MOSAIC_AGENT_CLASS) safe_policy_name "$value" || fail_env unsafe-class "$key" "$value" ;;
    MOSAIC_AGENT_RUNTIME)
      case "$value" in claude|codex|opencode|pi) ;; *) fail_env unsupported-runtime "$key" "$value" ;; esac
@@ -176,7 +175,7 @@ load_environment_file() {

 load_environment_file "$GENERATED_ENV" generated
 for required_key in \
-  MOSAIC_AGENT_NAME MOSAIC_GIT_IDENTITY MOSAIC_AGENT_CLASS MOSAIC_AGENT_RUNTIME MOSAIC_AGENT_MODEL \
+  MOSAIC_AGENT_NAME MOSAIC_AGENT_CLASS MOSAIC_AGENT_RUNTIME MOSAIC_AGENT_MODEL \
  MOSAIC_AGENT_REASONING MOSAIC_AGENT_TOOL_POLICY MOSAIC_AGENT_WORKDIR MOSAIC_TMUX_SOCKET; do
  [ -n "${GENERATED_VALUES[$required_key]+set}" ] || fail_env missing-key "$required_key" ''
 done
@@ -184,15 +183,12 @@ load_environment_file "$LOCAL_ENV" local

 [ "${GENERATED_VALUES[MOSAIC_AGENT_NAME]}" = "$AGENT_NAME" ] || \
  fail_env agent-name-mismatch MOSAIC_AGENT_NAME "${GENERATED_VALUES[MOSAIC_AGENT_NAME]}"
-[ "${GENERATED_VALUES[MOSAIC_GIT_IDENTITY]}" = "$AGENT_NAME" ] || \
-  fail_env git-identity-mismatch MOSAIC_GIT_IDENTITY "${GENERATED_VALUES[MOSAIC_GIT_IDENTITY]}"

 MOSAIC_TMUX_SOCKET=${GENERATED_VALUES[MOSAIC_TMUX_SOCKET]}
 MOSAIC_AGENT_RUNTIME=${GENERATED_VALUES[MOSAIC_AGENT_RUNTIME]}
 MOSAIC_AGENT_MODEL=${GENERATED_VALUES[MOSAIC_AGENT_MODEL]}
 MOSAIC_AGENT_REASONING=${GENERATED_VALUES[MOSAIC_AGENT_REASONING]}
 MOSAIC_AGENT_WORKDIR=${GENERATED_VALUES[MOSAIC_AGENT_WORKDIR]}
-MOSAIC_GIT_IDENTITY=${GENERATED_VALUES[MOSAIC_GIT_IDENTITY]}
 MOSAIC_AGENT_CLASS=${GENERATED_VALUES[MOSAIC_AGENT_CLASS]}
 MOSAIC_AGENT_TOOL_POLICY=${GENERATED_VALUES[MOSAIC_AGENT_TOOL_POLICY]}
 MOSAIC_RUNTIME_BIN=${LOCAL_VALUES[MOSAIC_RUNTIME_BIN]:-}
@@ -347,7 +343,6 @@ LAUNCH_ENV=(
  "PATH=$PANE_PATH"
  "MOSAIC_HOME=$MOSAIC_HOME"
  "MOSAIC_AGENT_NAME=$AGENT_NAME"
-  "MOSAIC_GIT_IDENTITY=$MOSAIC_GIT_IDENTITY"
  "MOSAIC_AGENT_CLASS=$MOSAIC_AGENT_CLASS"
  "MOSAIC_AGENT_RUNTIME=$MOSAIC_AGENT_RUNTIME"
  "MOSAIC_AGENT_MODEL=$MOSAIC_AGENT_MODEL"
@@ -62,19 +62,6 @@ env -0 > "${MOSAIC_HOME:?}/fleet/pane-environment"
 SHIM
 chmod +x "$FAKE_BIN/mosaic"

-# Freeze numeric epoch reads only when a test arm supplies an observation bound.
-# Formatting reads still use the real BusyBox/POSIX date implementation.
-cat > "$FAKE_BIN/date" <<'SHIM'
-#!/usr/bin/env bash
-set -euo pipefail
-if [ -n "${MOSAIC_TEST_FIXED_EPOCH:-}" ] && [ "${1:-}" = '+%s' ]; then
-  printf '%s\n' "$MOSAIC_TEST_FIXED_EPOCH"
-  exit 0
-fi
-exec /bin/date "$@"
-SHIM
-chmod +x "$FAKE_BIN/date"
-
 write_generated() {
  local home="$1"
  local agent="$2"
@@ -84,7 +71,6 @@ write_generated() {
  chmod 600 "$home/fleet/run/holder-owner"
  cat > "$home/fleet/agents/$agent.env.generated" <<EOF
 MOSAIC_AGENT_NAME=$agent
-MOSAIC_GIT_IDENTITY=$agent
 MOSAIC_AGENT_CLASS=code
 MOSAIC_AGENT_RUNTIME=pi
 MOSAIC_AGENT_MODEL=openai-codex/gpt-5.6-sol
@@ -102,7 +88,6 @@ run_start() {
  local agent="$2"
  HOME="$home" PATH="$FAKE_BIN:$PATH" MOSAIC_TEST_TMUX_CALLS="$TMUX_CALLS" \
    MOSAIC_TEST_PANE_PID="${MOSAIC_TEST_PANE_PID:-}" \
-    MOSAIC_TEST_FIXED_EPOCH="${MOSAIC_TEST_FIXED_EPOCH:-}" \
    MOSAIC_TEST_HOME="$home" \
    MOSAIC_TEST_FLEET_OWNER=123e4567-e89b-12d3-a456-426614174000 \
    MOSAIC_HOME="$home" "$START" "$agent"
@@ -129,42 +114,6 @@ fi
 echo "$valid_args" | grep -qxF '/usr/bin/env' || fail "pane does not use absolute env"
 echo "$valid_args" | grep -qxF -- '-i' || fail "pane environment is not cleared"

-# Git identity is generated authority, not an optional or independently mutable
-# local value. Each invalid form must fail before fake tmux receives a call.
-assert_git_identity_rejected() {
-  local case_name="$1"
-  local expected_code="$2"
-  local home="$ROOT/git-identity-$case_name"
-  local agent="coder-git-identity-$case_name"
-  local generated="$home/fleet/agents/$agent.env.generated"
-  write_generated "$home" "$agent"
-
-  case "$case_name" in
-    missing) grep -v '^MOSAIC_GIT_IDENTITY=' "$generated" > "$generated.next" && mv "$generated.next" "$generated" ;;
-    unsafe) sed -i 's|^MOSAIC_GIT_IDENTITY=.*$|MOSAIC_GIT_IDENTITY=bad/identity|' "$generated" ;;
-    mismatch) sed -i 's|^MOSAIC_GIT_IDENTITY=.*$|MOSAIC_GIT_IDENTITY=other-agent|' "$generated" ;;
-    local-shadow)
-      printf 'MOSAIC_GIT_IDENTITY=%s\n' "$agent" > "$home/fleet/agents/$agent.env.local"
-      chmod 600 "$home/fleet/agents/$agent.env.local"
-      ;;
-    *) fail "unknown Git identity rejection case: $case_name" ;;
-  esac
-  chmod 600 "$generated"
-
-  : > "$TMUX_CALLS"
-  if output=$(run_start "$home" "$agent" 2>&1); then
-    fail "Git identity case $case_name was accepted"
-  fi
-  [ ! -s "$TMUX_CALLS" ] || fail "tmux ran before Git identity $case_name rejection"
-  echo "$output" | grep -qF "code=$expected_code" || \
-    fail "Git identity $case_name diagnostic omitted code $expected_code"
-}
-
-assert_git_identity_rejected missing missing-key
-assert_git_identity_rejected unsafe unsafe-git-identity
-assert_git_identity_rejected mismatch git-identity-mismatch
-assert_git_identity_rejected local-shadow generated-key-shadow
-
 # The generated-file parent is a security boundary too: even a private regular
 # file is untrusted if its parent can be replaced or written by another user.
 # Validation must happen before fake tmux receives even a has-session call.
@@ -325,18 +274,6 @@ after_pane_env=$(printf '%s\n' "$pane_args" | grep -n -m1 -F '/usr/bin/env' | cu
 printf '%s\n' "$pane_args" | tail -n +"$after_pane_env" | grep -qxF -- '-i' || \
  fail "pane command did not clear its environment"
 pane_environment=$(tr '\0' '\n' < "$HOME_PANE_BOUNDARY/fleet/pane-environment")
-# Exercise the repository launcher at $START, not the independently installed
-# host copy. Set-compare every declared generated projection entry with the
-# launched process environment so a newly declared identity cannot be omitted
-# by a hand-maintained per-variable assertion.
-declared_generated_environment=$(sort "$HOME_PANE_BOUNDARY/fleet/agents/coder-pane-boundary.env.generated")
-missing_or_changed_generated_environment=$(comm -23 \
-  <(printf '%s\n' "$declared_generated_environment") \
-  <(printf '%s\n' "$pane_environment" | sort))
-if [ -n "$missing_or_changed_generated_environment" ]; then
-  missing_or_changed_keys=$(printf '%s\n' "$missing_or_changed_generated_environment" | cut -d= -f1 | paste -sd, -)
-  fail "runtime pane omitted or changed generated environment keys: $missing_or_changed_keys"
-fi
 echo "$pane_environment" | grep -qxF "HOME=$PANE_TRUSTED_HOME" || \
  fail "runtime pane did not receive trusted HOME"
 echo "$pane_environment" | grep -qF "$PANE_STALE_PATH" && fail "runtime pane received stale PATH"
@@ -353,7 +290,6 @@ write_interaction_generated() {
  chmod 600 "$home/fleet/run/holder-owner"
  cat > "$home/fleet/agents/$agent.env.generated" <<EOF
 MOSAIC_AGENT_NAME=$agent
-MOSAIC_GIT_IDENTITY=$agent
 MOSAIC_AGENT_CLASS=operator-interaction
 MOSAIC_AGENT_RUNTIME=pi
 MOSAIC_AGENT_MODEL=openai/gpt-5.6-sol
@@ -416,12 +352,8 @@ write_generated "$HOME_NATIVE_STALE" "coder-native-stale"
 write_heartbeat_local "$HOME_NATIVE_STALE" "coder-native-stale"
 STALE_HB="$HOME_NATIVE_STALE/run/coder-native-stale.hb"
 printf 'ts=native\npid=1\nstatus=busy\nmodel=stale-model\n' > "$STALE_HB"
-touch -t 200001010000.00 "$STALE_HB.native"
-# Hold the sidecar's observation epoch constant: assertion runtime must not age
-# a fresh-marker mutant into the stale state that this fixture must distinguish.
-STALE_OBSERVATION_EPOCH=$(date +%s)
-MOSAIC_TEST_FIXED_EPOCH="$STALE_OBSERVATION_EPOCH" \
-  MOSAIC_TEST_PANE_PID=$$ run_start "$HOME_NATIVE_STALE" coder-native-stale
+touch -d '10 seconds ago' "$STALE_HB.native"
+MOSAIC_TEST_PANE_PID=$$ run_start "$HOME_NATIVE_STALE" coder-native-stale
 wait_for_sidecar_status "$STALE_HB"

 HOME_NATIVE_ABSENT="$ROOT/native-absent"
@@ -449,7 +381,7 @@ echo "$output" | grep -qF 'code=unknown-key' || fail "interaction did not use sh
 : > "$TMUX_CALLS"
 HOME_INTERACTION_POLICY="$ROOT/interaction-policy"
 write_interaction_generated "$HOME_INTERACTION_POLICY" "interaction-policy"
-sed -i 's|^MOSAIC_AGENT_RUNTIME=pi$|MOSAIC_AGENT_RUNTIME=codex|' \
+perl -0pi -e 's/MOSAIC_AGENT_RUNTIME=pi/MOSAIC_AGENT_RUNTIME=codex/' \
  "$HOME_INTERACTION_POLICY/fleet/agents/interaction-policy.env.generated"
 if output=$(run_interaction "$HOME_INTERACTION_POLICY" interaction-policy 2>&1); then
  fail "interaction wrapper accepted a policy-incompatible projection"
@@ -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] [--expect-head SHA] [--co-author-trailers --escalate-to PRINCIPAL]
+# Usage: pr-merge.sh -n PR_NUMBER [-m squash] [-d]

 set -euo pipefail

@@ -14,8 +14,6 @@ MERGE_METHOD="squash"
 DELETE_BRANCH=false
 DRY_RUN=false
 EXPECT_HEAD=""
-CO_AUTHOR_TRAILERS=false
-ESCALATE_TO=""

 usage() {
    cat <<EOF
@@ -29,16 +27,12 @@ Options:
    -d, --delete-branch     Delete the head branch after merge
        --dry-run           Run metadata/login preflight without merging
        --expect-head SHA   Refuse unless the PR head matches this full commit SHA
-        --co-author-trailers Build verified trailers from linked PR commit authors
-        --escalate-to NAME  Named principal for an unresolved-author BLOCK
    -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 --expect-head 0123456789abcdef0123456789abcdef01234567
-    $(basename "$0") -n 42 --co-author-trailers --escalate-to tl-mosaic
 EOF
    exit "${1:-1}"
 }
@@ -63,25 +57,9 @@ while [[ $# -gt 0 ]]; do
            shift
            ;;
        --expect-head)
-            if [[ $# -lt 2 ]]; then
-                echo "Error: --expect-head requires one full commit SHA." >&2
-                exit 1
-            fi
            EXPECT_HEAD="$2"
            shift 2
            ;;
-        --co-author-trailers)
-            CO_AUTHOR_TRAILERS=true
-            shift
-            ;;
-        --escalate-to)
-            if [[ $# -lt 2 ]]; then
-                echo "Error: --escalate-to requires one principal name." >&2
-                exit 1
-            fi
-            ESCALATE_TO="$2"
-            shift 2
-            ;;
        -h|--help)
            usage 0
            ;;
@@ -110,30 +88,17 @@ if [[ -n "$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
-if [[ "$CO_AUTHOR_TRAILERS" == true && -z "$ESCALATE_TO" ]]; then
-    echo "Error: --co-author-trailers requires --escalate-to with a named principal." >&2
-    exit 1
-fi
-if [[ -n "$ESCALATE_TO" && ! "$ESCALATE_TO" =~ ^[A-Za-z0-9_.-]+$ ]]; then
-    echo "Error: --escalate-to must be one exact principal name." >&2
-    exit 1
-fi
-if [[ "$CO_AUTHOR_TRAILERS" != true && -n "$ESCALATE_TO" ]]; then
-    echo "Error: --escalate-to is valid only with --co-author-trailers." >&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' "$PR_METADATA" | python3 -c 'import json, sys; value=json.load(sys.stdin).get("headRepository") or ""; print((value.get("nameWithOwner") or value.get("full_name") or "") if isinstance(value, dict) else str(value).strip())')"
-PR_TITLE="$(printf '%s' "$PR_METADATA" | python3 -c 'import json, sys; print((json.load(sys.stdin).get("title") or "").strip())')"
-PR_AUTHOR="$(printf '%s' "$PR_METADATA" | python3 -c 'import json, sys; value=json.load(sys.stdin).get("author") or ""; print((value.get("login") or "").strip() if isinstance(value, dict) else str(value).strip())')"
 if [[ "$BASE_BRANCH" != "main" ]]; then
    echo "Error: Mosaic policy allows merges only for PRs targeting 'main' (found '$BASE_BRANCH')." >&2
    exit 1
 fi
+
 if [[ -z "$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
@@ -157,442 +122,70 @@ PLATFORM=$(detect_platform)
 OWNER=$(get_repo_owner)
 REPO=$(get_repo_name)

-write_curl_auth_config() {
-    local mode="$1" credential="$2"
-    printf '%s' "$credential" | python3 -c '
-import sys
-mode = sys.argv[1]
-credential = sys.stdin.read()
-if not credential or any(char in credential for char in "\r\n"):
-    raise SystemExit(1)
-escaped = credential.replace("\\", "\\\\").replace("\"", "\\\"")
-if mode == "token":
-    print(f"header = \"Authorization: token {escaped}\"")
-elif mode == "basic":
-    print(f"user = \"{escaped}\"")
-else:
-    raise SystemExit(1)
-' "$mode"
-}
-
-LAST_GITEA_HTTP_CODE="000"
-LAST_GITEA_ERROR=""
-MERGE_TEMP_DIRS=()
-GITEA_CURL_MAX_BYTES="${MOSAIC_GITEA_CURL_MAX_BYTES:-1048576}"
-GITEA_CURL_MAX_TIME="${MOSAIC_GITEA_CURL_MAX_TIME_SEC:-30}"
-GITEA_CURL_CONNECT_TIMEOUT="${MOSAIC_GITEA_CURL_CONNECT_TIMEOUT_SEC:-10}"
-for bound in "$GITEA_CURL_MAX_BYTES" "$GITEA_CURL_MAX_TIME" "$GITEA_CURL_CONNECT_TIMEOUT"; do
-    if [[ ! "$bound" =~ ^[1-9][0-9]*$ ]]; then
-        echo "Error: Gitea curl bounds must be positive integers; refusing request." >&2
-        exit 1
-    fi
-done
-GITEA_CURL_BOUNDS=(
-    --max-filesize "$GITEA_CURL_MAX_BYTES"
-    --max-time "$GITEA_CURL_MAX_TIME"
-    --connect-timeout "$GITEA_CURL_CONNECT_TIMEOUT"
-)
-
-format_gitea_error_response() {
-    local response_file="$1"
-    python3 - "$response_file" <<'PY'
-import json
-import sys
-
-with open(sys.argv[1], "rb") as handle:
-    raw = handle.read(65536)
-try:
-    response = json.loads(raw.decode("utf-8", errors="replace"))
-except (UnicodeDecodeError, json.JSONDecodeError):
-    message = "non-JSON response omitted"
-else:
-    if isinstance(response, dict):
-        message = response.get("message") or response.get("error")
-        if not message and response.get("errors") is not None:
-            message = json.dumps(response["errors"], separators=(",", ":"))
-    else:
-        message = None
-    if not message:
-        message = "JSON response contained no error message"
-message = str(message)
-if len(message) > 500:
-    message = message[:500] + "..."
-print(ascii(message))
-PY
-}
-
-cleanup_merge_temp_dirs() {
-    local path
-    for path in "${MERGE_TEMP_DIRS[@]}"; do
-        [[ -n "$path" ]] && rm -rf -- "$path"
-    done
-}
-trap cleanup_merge_temp_dirs EXIT
-trap 'exit 130' INT
-trap 'exit 143' TERM
-
-fetch_gitea_pr_head() {
-    local host="$1" auth_mode="$2" credential="$3" work_root="$4"
-    local response_file raw_code api_url auth_config curl_rc
-    response_file=$(mktemp "$work_root/pr-merge-pr.XXXXXX")
-    api_url="https://${host}/api/v1/repos/${OWNER}/${REPO}/pulls/${PR_NUMBER}"
-    if ! auth_config=$(write_curl_auth_config "$auth_mode" "$credential"); then
-        echo "Error: Could not construct Gitea authentication config; refusing request." >&2
-        rm -f "$response_file"
-        return 1
-    fi
-    raw_code=$(curl -sS -K - "${GITEA_CURL_BOUNDS[@]}" -w '%{http_code}' -o "$response_file" \
-        -H "User-Agent: curl/8" "$api_url" <<<"$auth_config")
-    curl_rc=$?
-    LAST_GITEA_HTTP_CODE="${raw_code:-000}"
-    if [[ "$curl_rc" -ne 0 ]]; then
-        LAST_GITEA_ERROR="curl transport failed (rc=$curl_rc)"
-        rm -f "$response_file"
-        return 1
-    fi
-    if [[ ! "$raw_code" =~ ^2 ]]; then
-        LAST_GITEA_ERROR=$(format_gitea_error_response "$response_file")
-        rm -f "$response_file"
-        return 1
-    fi
-    if ! python3 - "$response_file" <<'PY'
-import json
-import re
-import sys
-
-with open(sys.argv[1], encoding="utf-8") as handle:
-    pull = json.load(handle)
-head = pull.get("head") if isinstance(pull, dict) else None
-sha = str(head.get("sha") or "") if isinstance(head, dict) else ""
-if not re.fullmatch(r"[0-9a-fA-F]{40}", sha):
-    raise SystemExit(1)
-print(sha)
-PY
-    then
-        echo "Error: Gitea PR response has no valid head SHA; refusing merge." >&2
-        rm -f "$response_file"
-        return 1
-    fi
-    rm -f "$response_file"
-}
-
-fetch_gitea_pr_commits() {
-    local host="$1" auth_mode="$2" credential="$3" work_root="$4"
-    local page page_file combined_file merged_file raw_code page_count api_url auth_config curl_rc
-    mkdir -p "$work_root"
-    if ! auth_config=$(write_curl_auth_config "$auth_mode" "$credential"); then
-        echo "Error: Could not construct Gitea authentication config; refusing request." >&2
-        return 1
-    fi
-    combined_file=$(mktemp "$work_root/pr-merge-commits.XXXXXX")
-    printf '[]' > "$combined_file"
-
-    page=1
-    while true; do
-        page_file=$(mktemp "$work_root/pr-merge-commits-page.XXXXXX")
-        api_url="https://${host}/api/v1/repos/${OWNER}/${REPO}/pulls/${PR_NUMBER}/commits?limit=50&page=${page}"
-        raw_code=$(curl -sS -K - "${GITEA_CURL_BOUNDS[@]}" -w '%{http_code}' -o "$page_file" \
-            -H "User-Agent: curl/8" "$api_url" <<<"$auth_config")
-        curl_rc=$?
-        LAST_GITEA_HTTP_CODE="${raw_code:-000}"
-        if [[ "$curl_rc" -ne 0 ]]; then
-            LAST_GITEA_ERROR="curl transport failed (rc=$curl_rc)"
-            rm -f "$page_file" "$combined_file"
-            return 1
-        fi
-        if [[ ! "$raw_code" =~ ^2 ]]; then
-            LAST_GITEA_ERROR=$(format_gitea_error_response "$page_file")
-            rm -f "$page_file" "$combined_file"
-            return 1
-        fi
-
-        if ! page_count=$(python3 - "$page_file" <<'PY'
-import json
-import sys
-
-with open(sys.argv[1], encoding="utf-8") as handle:
-    page = json.load(handle)
-if not isinstance(page, list):
-    raise SystemExit(1)
-print(len(page))
-PY
-        ); then
-            echo "Error: Gitea PR commits response is not a JSON array; refusing merge." >&2
-            rm -f "$page_file" "$combined_file"
-            return 1
-        fi
-
-        merged_file=$(mktemp "$work_root/pr-merge-commits-merged.XXXXXX")
-        if ! python3 - "$combined_file" "$page_file" > "$merged_file" <<'PY'
-import json
-import sys
-
-with open(sys.argv[1], encoding="utf-8") as handle:
-    combined = json.load(handle)
-with open(sys.argv[2], encoding="utf-8") as handle:
-    page = json.load(handle)
-json.dump(combined + page, sys.stdout, separators=(",", ":"))
-PY
-        then
-            echo "Error: Could not combine paginated PR commit metadata; refusing merge." >&2
-            rm -f "$page_file" "$combined_file" "$merged_file"
-            return 1
-        fi
-        mv "$merged_file" "$combined_file"
-        rm -f "$page_file"
-
-        if [[ "$page_count" -lt 50 ]]; then
-            break
-        fi
-        page=$((page + 1))
-        if [[ "$page" -gt 1000 ]]; then
-            echo "Error: PR commit pagination exceeded 1000 pages; refusing merge." >&2
-            rm -f "$combined_file"
-            return 1
-        fi
-    done
-
-    cat "$combined_file"
-    rm -f "$combined_file"
-}
-
-# LIMITATION: author.login resolution proves the commit address maps to a registered account.
-# It does NOT prove the named principal authored the commit — git author metadata is self-asserted.
-# This gate checks ATTRIBUTION LINKAGE, not AUTHORSHIP. Commit signing is out of scope and unadopted.
-build_coauthor_message_fields() {
-    local commits_file="$1" context_file="$2" head_file="$3"
-    python3 - "$commits_file" "$context_file" "$head_file" <<'PY'
-import json
-import re
-import sys
-
-commits_path, context_path, head_path = sys.argv[1:]
-with open(commits_path, encoding="utf-8") as handle:
-    commits = json.load(handle)
-head_sha = open(head_path, encoding="utf-8").read().strip()
-context_parts = open(context_path, "rb").read().split(b"\0")
-if len(context_parts) != 4 or context_parts[-1] != b"":
-    raise SystemExit(1)
-poster, title, principal = (part.decode("utf-8") for part in context_parts[:3])
-
-if not isinstance(commits, list) or not commits:
-    print(
-        f"BLOCK: provider returned no PR commits; author identity is unmeasurable. "
-        f"Refusing merge; escalate to named principal '{principal}'.",
-        file=sys.stderr,
-    )
-    raise SystemExit(75)
-if not poster:
-    print(
-        f"BLOCK: PR poster login is empty; refusing merge; "
-        f"escalate to named principal '{principal}'.",
-        file=sys.stderr,
-    )
-    raise SystemExit(75)
-
-if not re.fullmatch(r"[0-9a-fA-F]{40}", head_sha):
-    print(
-        f"BLOCK: inspected PR head SHA is invalid; refusing merge; "
-        f"escalate to named principal '{principal}'.",
-        file=sys.stderr,
-    )
-    raise SystemExit(75)
-
-seen = set()
-trailers = []
-head_seen = False
-for item in commits:
-    if not isinstance(item, dict):
-        print(f"BLOCK: malformed PR commit metadata; escalate to named principal '{principal}'.", file=sys.stderr)
-        raise SystemExit(75)
-    sha = str(item.get("sha") or "<unknown>")
-    if sha == head_sha:
-        head_seen = True
-    commit = item.get("commit") if isinstance(item.get("commit"), dict) else {}
-    commit_author = commit.get("author") if isinstance(commit.get("author"), dict) else {}
-    email = str(commit_author.get("email") or "").strip()
-    provider_author = item.get("author") if isinstance(item.get("author"), dict) else {}
-    login = str(provider_author.get("login") or "").strip()
-
-    if not login:
-        diagnostic_email = email or "<missing>"
-        print(
-            f"BLOCK: commit {sha!r} has author.login=NULL while "
-            f"commit.author.email={diagnostic_email!r}; refusing merge; "
-            f"escalate to named principal '{principal}'.",
-            file=sys.stderr,
-        )
-        raise SystemExit(75)
-    if (
-        not email.isascii()
-        or not email.isprintable()
-        or not re.fullmatch(r"[A-Za-z0-9_.-]+", login)
-        or not re.fullmatch(r"[^<>\s]+@[^<>\s]+", email)
-    ):
-        print(
-            f"BLOCK: commit {sha!r} has unusable linked identity "
-            f"author.login={login!r}, commit.author.email={email!r}; refusing merge; "
-            f"escalate to named principal '{principal}'.",
-            file=sys.stderr,
-        )
-        raise SystemExit(75)
-    if login == poster or login in seen:
-        continue
-    seen.add(login)
-    trailers.append(f"Co-authored-by: {login} <{email}>")
-
-if not head_seen:
-    print(
-        f"BLOCK: inspected PR head is absent from commit enumeration; refusing merge; "
-        f"escalate to named principal '{principal}'.",
-        file=sys.stderr,
-    )
-    raise SystemExit(75)
-if not trailers:
-    print("{}")
-    raise SystemExit(0)
-if not title:
-    print(
-        f"BLOCK: PR title is empty; refusing merge; escalate to named principal '{principal}'.",
-        file=sys.stderr,
-    )
-    raise SystemExit(75)
-if not title.isprintable() or re.match(r"^[A-Za-z-]+-[Bb]y:", title):
-    print(
-        f"BLOCK: PR title is not one printable, non-trailer line; refusing merge; "
-        f"escalate to named principal '{principal}'.",
-        file=sys.stderr,
-    )
-    raise SystemExit(75)
-
-print(json.dumps({
-    "MergeTitleField": title,
-    "MergeMessageField": "\n".join(trailers),
-}, separators=(",", ":")))
-PY
-}
-
-merge_gitea_api_attempt() {
-    local host="$1" auth_mode="$2" credential="$3"
-    local api_url attempt_dir body_file raw_code commits_file fields_file context_file head_file payload_file work_root attempt_rc auth_config curl_rc
-    LAST_GITEA_HTTP_CODE="000"
-    LAST_GITEA_ERROR=""
+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/${PR_NUMBER}/merge"
-    work_root="${AGENT_WORK_ROOT:-${HOME:-/tmp}/mosaic/agent-work}"
-    mkdir -p "$work_root"
-    attempt_dir=$(mktemp -d "$work_root/pr-merge-attempt.XXXXXX")
-    chmod 0700 "$attempt_dir"
-    MERGE_TEMP_DIRS+=("$attempt_dir")
-    body_file=$(mktemp "$attempt_dir/api-response.XXXXXX")
-    fields_file=$(mktemp "$attempt_dir/message-fields.XXXXXX")
-    payload_file=$(mktemp "$attempt_dir/payload.XXXXXX")
-    printf '{}' > "$fields_file"
-
-    if [[ "$CO_AUTHOR_TRAILERS" == true ]]; then
-        commits_file=$(mktemp "$attempt_dir/pr-merge-commits-input.XXXXXX")
-        context_file=$(mktemp "$attempt_dir/pr-merge-message-context.XXXXXX")
-        head_file=$(mktemp "$attempt_dir/pr-merge-head-input.XXXXXX")
-        printf '%s\0%s\0%s\0' "$PR_AUTHOR" "$PR_TITLE" "$ESCALATE_TO" > "$context_file"
-        if fetch_gitea_pr_head "$host" "$auth_mode" "$credential" "$attempt_dir" > "$head_file"; then
-            :
-        else
-            attempt_rc=$?
-            rm -f "$body_file" "$fields_file" "$payload_file" "$commits_file" "$context_file" "$head_file"
-            return "$attempt_rc"
-        fi
-        if [[ "$(<"$head_file")" != "$HEAD_SHA" ]]; then
-            echo "BLOCK: authenticated PR head moved from reviewed $HEAD_SHA to $(<"$head_file"); refusing merge; escalate to named principal '$ESCALATE_TO'." >&2
-            rm -f "$body_file" "$fields_file" "$payload_file" "$commits_file" "$context_file" "$head_file"
-            return 75
-        fi
-        if fetch_gitea_pr_commits "$host" "$auth_mode" "$credential" "$attempt_dir" > "$commits_file"; then
-            :
-        else
-            attempt_rc=$?
-            rm -f "$body_file" "$fields_file" "$payload_file" "$commits_file" "$context_file" "$head_file"
-            return "$attempt_rc"
-        fi
-        if build_coauthor_message_fields "$commits_file" "$context_file" "$head_file" > "$fields_file"; then
-            :
-        else
-            attempt_rc=$?
-            rm -f "$body_file" "$fields_file" "$payload_file" "$commits_file" "$context_file" "$head_file"
-            return "$attempt_rc"
-        fi
-        rm -f "$commits_file" "$context_file" "$head_file"
-    fi
-
-    if ! python3 - "$fields_file" "$HEAD_SHA" "$DELETE_BRANCH" > "$payload_file" <<'PY'
+    mkdir -p "${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=$(python3 - "$HEAD_SHA" "$DELETE_BRANCH" <<'PY'
 import json
 import sys

-with open(sys.argv[1], encoding="utf-8") as handle:
-    fields = json.load(handle)
-head_sha, delete_branch = sys.argv[2:]
+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
-payload.update(fields)
-allowed = {"Do", "head_commit_id", "delete_branch_after_merge", "MergeTitleField", "MergeMessageField"}
-if payload.get("Do") != "squash" or set(payload) - allowed:
-    raise SystemExit(1)
 print(json.dumps(payload, separators=(",", ":")))
 PY
-    then
-        rm -f "$body_file" "$fields_file" "$payload_file"
-        return 1
-    fi
-    rm -f "$fields_file"
+)

-    if ! auth_config=$(write_curl_auth_config "$auth_mode" "$credential"); then
-        echo "Error: Could not construct Gitea authentication config; refusing request." >&2
-        rm -f "$body_file" "$payload_file"
-        return 1
+    token=$(get_gitea_token "$host" || true)
+    if [[ -n "$token" ]]; then
+        raw_code=$(curl -sS -w '%{http_code}' -o "$body_file" \
+            -X POST \
+            -H "User-Agent: curl/8" \
+            -H "Authorization: token $token" \
+            -H 'Content-Type: application/json' \
+            -d "$payload" \
+            "$api_url" || true)
+        if [[ "$raw_code" =~ ^2 ]]; then
+            rm -f "$body_file"
+            return 0
+        fi
    fi
-    raw_code=$(curl -sS -K - "${GITEA_CURL_BOUNDS[@]}" -w '%{http_code}' -o "$body_file" \
-        -X POST -H "User-Agent: curl/8" \
-        -H 'Content-Type: application/json' \
-        --data-binary "@$payload_file" "$api_url" <<<"$auth_config")
-    curl_rc=$?
-    LAST_GITEA_HTTP_CODE="${raw_code:-000}"
-    if [[ "$curl_rc" -ne 0 ]]; then
-        LAST_GITEA_ERROR="curl transport failed (rc=$curl_rc)"
-        rm -f "$body_file" "$payload_file"
-        rm -rf -- "$attempt_dir"
-        return 1
-    fi
-    if [[ ! "$raw_code" =~ ^2 ]]; then
-        LAST_GITEA_ERROR=$(format_gitea_error_response "$body_file")
-    fi
-    rm -f "$body_file" "$payload_file"
-    rm -rf -- "$attempt_dir"
-    [[ "$raw_code" =~ ^2 ]]
-}

-merge_gitea_with_api() {
-    local host="$1" token attempt_rc
+    basic_auth=$(get_gitea_basic_auth "$host" || true)
+    if [[ -n "$basic_auth" ]]; then
+        raw_code=$(curl -sS -w '%{http_code}' -o "$body_file" \
+            -X POST \
+            -u "$basic_auth" \
+            -H "User-Agent: curl/8" \
+            -H 'Content-Type: application/json' \
+            -d "$payload" \
+            "$api_url" || true)
+        if [[ "$raw_code" =~ ^2 ]]; then
+            rm -f "$body_file"
+            return 0
+        fi
+    fi

-    if ! token=$(get_gitea_token "$host"); then
-        echo "Error: Could not resolve the required Gitea token; refusing merge without changing principals." >&2
-        return 1
-    fi
-    if [[ -z "$token" ]]; then
-        echo "Error: Required Gitea token resolved empty; refusing merge without changing principals." >&2
-        return 1
-    fi
-    if merge_gitea_api_attempt "$host" token "$token"; then
-        return 0
-    else
-        attempt_rc=$?
-    fi
-    if [[ "$attempt_rc" -eq 75 ]]; then
-        return 75
-    fi
-    if [[ "$LAST_GITEA_HTTP_CODE" != "401" ]]; then
-        echo "Error: Gitea API merge failed with the identity-bound token (HTTP ${LAST_GITEA_HTTP_CODE:-000}).${LAST_GITEA_ERROR:+ Provider response: $LAST_GITEA_ERROR}" >&2
-        return 1
-    fi
-    echo "Error: Gitea API rejected the identity-bound token with HTTP 401; refusing cross-principal credential fallback." >&2
+    python3 - "${raw_code:-000}" "$body_file" <<'PY' >&2
+import json
+import sys
+code, path = sys.argv[1], sys.argv[2]
+try:
+    with open(path, encoding="utf-8", errors="replace") as handle:
+        raw = handle.read(500)
+    data = json.loads(raw) if raw else {}
+    message = data.get("message") or data.get("error") or raw or "empty response"
+except Exception:
+    try:
+        message = open(path, encoding="utf-8", errors="replace").read(500) or "empty response"
+    except Exception:
+        message = "unreadable response"
+print(f"Error: Gitea API merge failed with HTTP {code}: {message}")
+PY
+    rm -f "$body_file"
    return 1
 }

@@ -602,10 +195,11 @@ if [[ "$DRY_RUN" == true ]]; then
            echo "Error: Cannot determine host from origin remote URL" >&2
            exit 1
        }
-        if [[ "$CO_AUTHOR_TRAILERS" == true ]]; then
-            echo "Dry run: would verify PR commit authors and merge PR #$PR_NUMBER on $HOST with authenticated Gitea API message fields (base=$BASE_BRANCH, method=squash)."
+        TEA_LOGIN="$(get_gitea_login_for_host "$HOST" || true)"
+        if [[ -n "$TEA_LOGIN" ]]; then
+            echo "Dry run: would merge PR #$PR_NUMBER on $HOST with tea login '$TEA_LOGIN' (base=$BASE_BRANCH, method=squash)."
        else
-            echo "Dry run: would merge PR #$PR_NUMBER on $HOST with the authenticated exact-head Gitea API path (base=$BASE_BRANCH, method=squash)."
+            echo "Dry run: would merge PR #$PR_NUMBER on $HOST with authenticated Gitea API fallback (base=$BASE_BRANCH, method=squash)."
        fi
    else
        echo "Dry run: would merge PR #$PR_NUMBER on $PLATFORM (base=$BASE_BRANCH, method=squash)."
@@ -615,10 +209,6 @@ fi

 case "$PLATFORM" in
    github)
-        if [[ "$CO_AUTHOR_TRAILERS" == true ]]; then
-            echo "Error: --co-author-trailers currently requires the Gitea REST message-field contract." >&2
-            exit 1
-        fi
        cmd=(gh pr merge "$PR_NUMBER" --squash --match-head-commit "$HEAD_SHA")
        [[ "$DELETE_BRANCH" == true ]] && cmd+=(--delete-branch)
        "${cmd[@]}"
@@ -629,7 +219,7 @@ case "$PLATFORM" in
            exit 1
        }
        # Gitea's API head_commit_id is an atomic compare-and-merge precondition.
-        # tea cannot express it, so every Gitea merge uses the authenticated API path.
+        # tea cannot express it, so exact-head merges use the authenticated API path.
        merge_gitea_with_api "$HOST"
        ;;
    *)
@@ -51,23 +51,22 @@ for arg in "$@"; do
        prev=""
        continue
    fi
-    if [[ "$prev" == "data" ]]; then
+    if [[ "$prev" == "-d" ]]; then
        post_data="$arg"
-        [[ "$post_data" == @* ]] && post_data=$(<"${post_data#@}")
        prev=""
        continue
    fi
-    if [[ "$prev" == "config" ]]; then
-        [[ "$arg" == "-" ]] && cat >/dev/null
-        prev=""
+    if [[ "$arg" == "-o" ]]; then
+        prev="-o"
        continue
    fi
-    case "$arg" in
-        -o) prev="-o" ;;
-        -d|--data|--data-binary) prev="data" ;;
-        -K|--config) prev="config" ;;
-        -w) write_code=true ;;
-    esac
+    if [[ "$arg" == "-d" ]]; then
+        prev="-d"
+        continue
+    fi
+    if [[ "$arg" == "-w" ]]; then
+        write_code=true
+    fi
 done
 emit_response() {
    local body="$1"
@@ -36,30 +36,13 @@ cat > "$WORK_DIR/gitea/curl" <<'SH'
 #!/usr/bin/env bash
 set -euo pipefail
 payload=""
-out_file=""
-while [[ $# -gt 0 ]]; do
-    case "$1" in
-        -d|--data|--data-binary)
-            payload="$2"
-            [[ "$payload" == @* ]] && payload=$(<"${payload#@}")
-            shift 2
-            ;;
-        -o)
-            out_file="$2"
-            shift 2
-            ;;
-        -K|--config)
-            [[ "$2" == "-" ]] && cat >/dev/null
-            shift 2
-            ;;
-        -w|-X|-H)
-            shift 2
-            ;;
-        *) shift ;;
-    esac
+for ((i=1; i<=$#; i++)); do
+    if [[ "${!i}" == "-d" ]]; then
+        j=$((i + 1))
+        payload="${!j}"
+    fi
 done
 printf '%s' "$payload" > "${MOSAIC_MERGE_PAYLOAD_LOG:?}"
-[[ -n "$out_file" ]] && printf '{}' > "$out_file"
 printf '200'
 SH
 chmod +x "$WORK_DIR/gitea/curl"
@@ -1,541 +0,0 @@
-#!/usr/bin/env bash
-# Regression harness for the optional, identity-checked Gitea squash message.
-
-set -u
-
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-SUBJECT="${MOSAIC_TEST_SUBJECT:-$SCRIPT_DIR/pr-merge.sh}"
-WORK_DIR="${MOSAIC_TEST_WORK_DIR:-$PWD/.mosaic-test-work/pr-merge-message-field}"
-ORIG_PATH="$PATH"
-failures=0
-
-rm -rf "$WORK_DIR"
-mkdir -p "$WORK_DIR"
-
-fail() {
-    echo "FAIL $1" >&2
-    failures=$((failures + 1))
-}
-
-make_case() {
-    local name="$1" case_dir
-    case_dir="$WORK_DIR/$name"
-    mkdir -p "$case_dir/bin" "$case_dir/agent"
-    cp "$SUBJECT" "$case_dir/pr-merge.sh"
-    chmod +x "$case_dir/pr-merge.sh"
-
-    cat > "$case_dir/detect-platform.sh" <<'SH'
-#!/usr/bin/env bash
-detect_platform() { PLATFORM=gitea; printf 'gitea\n'; }
-get_repo_owner() { printf 'acme\n'; }
-get_repo_name() { printf 'widgets\n'; }
-get_remote_host() { printf 'git.example.test\n'; }
-get_gitea_token() {
-    printf 'resolved\n' >> "${MOSAIC_TEST_TOKEN_RESOLUTION_LOG:?}"
-    if [[ "${MOSAIC_TEST_TOKEN_AVAILABLE:-true}" != "true" ]]; then
-        return 1
-    fi
-    printf 'fixture-token\n'
-}
-get_gitea_basic_auth() {
-    printf 'resolved\n' >> "${MOSAIC_TEST_BASIC_RESOLUTION_LOG:?}"
-    if [[ "${MOSAIC_TEST_BASIC_AVAILABLE:-false}" == "true" ]]; then
-        printf 'fixture-user:fixture-password\n'
-        return "${MOSAIC_TEST_BASIC_RC:-0}"
-    fi
-    return 1
-}
-get_gitea_login_for_host() { return 1; }
-SH
-
-    cat > "$case_dir/pr-metadata.sh" <<'SH'
-#!/usr/bin/env bash
-if [[ "${MOSAIC_TEST_TITLE_MODE:-safe}" == "injection" ]]; then
-    title='Preserve authors\n\nCo-authored-by: victim <[email protected]>'
-else
-    title='Preserve both branch authors'
-fi
-case "${MOSAIC_TEST_COMMITS_MODE:?}" in
-    verified) head_sha=2222222222222222222222222222222222222222 ;;
-    null-login|unsafe-identity) head_sha=3333333333333333333333333333333333333333 ;;
-    single) head_sha=1111111111111111111111111111111111111111 ;;
-    *) echo "unknown commits mode" >&2; exit 2 ;;
-esac
-printf '{"number":42,"title":"%s","author":"poster","baseRefName":"main","headRefName":"feature/fixture","headRefOid":"%s","headRepository":"acme/widgets"}\n' "$title" "$head_sha"
-SH
-
-    cat > "$case_dir/ci-queue-wait.sh" <<'SH'
-#!/usr/bin/env bash
-exit 0
-SH
-
-    cat > "$case_dir/bin/python3" <<'SH'
-#!/usr/bin/env bash
-for arg in "$@"; do
-    case "$arg" in
-        *"Preserve both branch authors"*|*"[email protected]"*)
-            : > "${MOSAIC_TEST_METADATA_ARGV_MARKER:?}"
-            ;;
-    esac
-done
-exec "${MOSAIC_TEST_REAL_PYTHON:?}" "$@"
-SH
-
-    cat > "$case_dir/bin/curl" <<'SH'
-#!/usr/bin/env bash
-set -eu
-
-for arg in "$@"; do
-    case "$arg" in
-        *"Preserve both branch authors"*|*"[email protected]"*)
-            : > "${MOSAIC_TEST_METADATA_ARGV_MARKER:?}"
-            ;;
-    esac
-done
-
-url=""
-method="GET"
-out_file=""
-data=""
-config=""
-auth_mode="none"
-has_max_filesize=0
-has_max_time=0
-has_connect_timeout=0
-while [[ $# -gt 0 ]]; do
-    case "$1" in
-        -o)
-            out_file="$2"
-            shift 2
-            ;;
-        -w)
-            shift 2
-            ;;
-        -X)
-            method="$2"
-            shift 2
-            ;;
-        -d|--data|--data-binary)
-            data="$2"
-            if [[ "$data" == @* ]]; then
-                data=$(<"${data#@}")
-            fi
-            shift 2
-            ;;
-        -K|--config)
-            if [[ "$2" == "-" ]]; then
-                config=$(cat)
-            fi
-            shift 2
-            ;;
-        --max-filesize)
-            has_max_filesize=1
-            shift 2
-            ;;
-        --max-time)
-            has_max_time=1
-            shift 2
-            ;;
-        --connect-timeout)
-            has_connect_timeout=1
-            shift 2
-            ;;
-        -H|--header|-u|--user)
-            if [[ "$2" == *"fixture-token"* ]]; then
-                : > "${MOSAIC_TEST_TOKEN_ARGV_MARKER:?}"
-            fi
-            if [[ "$2" == *"fixture-password"* ]]; then
-                : > "${MOSAIC_TEST_BASIC_ARGV_MARKER:?}"
-            fi
-            shift 2
-            ;;
-        http://*|https://*)
-            url="$1"
-            shift
-            ;;
-        *)
-            shift
-            ;;
-    esac
-done
-
-if [[ "$config" == *"Authorization: token fixture-token"* ]]; then
-    auth_mode="token"
-    : > "${MOSAIC_TEST_AUTH_CONFIG_MARKER:?}"
-elif [[ "$config" == *"user = \"fixture-user:fixture-password\""* ]]; then
-    auth_mode="basic"
-    : > "${MOSAIC_TEST_BASIC_CONFIG_MARKER:?}"
-fi
-printf '%s %s %s\n' "$method" "$auth_mode" "$url" >> "${MOSAIC_TEST_CURL_LOG:?}"
-printf '%s:%s:%s\n' "$has_max_filesize" "$has_max_time" "$has_connect_timeout" >> "${MOSAIC_TEST_CURL_BOUNDS_LOG:?}"
-
-case "$url" in
-    */pulls/42)
-        case "${MOSAIC_TEST_COMMITS_MODE:?}" in
-            verified) head_sha=2222222222222222222222222222222222222222 ;;
-            null-login|unsafe-identity) head_sha=3333333333333333333333333333333333333333 ;;
-            single) head_sha=1111111111111111111111111111111111111111 ;;
-            *) echo "unknown commits mode" >&2; exit 2 ;;
-        esac
-        if [[ "${MOSAIC_TEST_HEAD_MODE:-stable}" == "moved" ]]; then
-            head_sha=4444444444444444444444444444444444444444
-        fi
-        body="{\"head\":{\"sha\":\"$head_sha\"}}"
-        code=200
-        if [[ "${MOSAIC_TEST_FALLBACK_MODE:-none}" == "inspection" && "$auth_mode" == "token" ]]; then
-            body='{"message":"token rejected"}'
-            code=401
-        fi
-        ;;
-    */pulls/42/commits*)
-        case "${MOSAIC_TEST_COMMITS_MODE:?}" in
-            verified)
-                if [[ "${MOSAIC_TEST_EMAIL_MODE:-safe}" == "escape" ]]; then
-                    body='[{"sha":"2222222222222222222222222222222222222222","commit":{"author":{"name":"Alice","email":"alice+\u001b[[email protected]"}},"author":{"login":"alice"}},{"sha":"1111111111111111111111111111111111111111","commit":{"author":{"name":"Poster","email":"[email protected]"}},"author":{"login":"poster"}}]'
-                else
-                    body='[{"sha":"2222222222222222222222222222222222222222","commit":{"author":{"name":"Alice","email":"[email protected]"}},"author":{"login":"alice"}},{"sha":"1111111111111111111111111111111111111111","commit":{"author":{"name":"Poster","email":"[email protected]"}},"author":{"login":"poster"}}]'
-                fi
-                ;;
-            null-login)
-                body='[{"sha":"1111111111111111111111111111111111111111","commit":{"author":{"name":"Poster","email":"[email protected]"}},"author":{"login":"poster"}},{"sha":"3333333333333333333333333333333333333333","commit":{"author":{"name":"Unresolved Author","email":"[email protected]\n\u001b[31m"}},"author":null}]'
-                ;;
-            unsafe-identity)
-                body='[{"sha":"unsafe\n\u001b[31m","commit":{"author":{"name":"Unsafe","email":"not-an-email"}},"author":{"login":"unsafe"}},{"sha":"3333333333333333333333333333333333333333","commit":{"author":{"name":"Poster","email":"[email protected]"}},"author":{"login":"poster"}}]'
-                ;;
-            single)
-                body='[{"sha":"1111111111111111111111111111111111111111","commit":{"author":{"name":"Poster","email":"[email protected]"}},"author":{"login":"poster"}}]'
-                ;;
-            *)
-                echo "unknown commits mode" >&2
-                exit 2
-                ;;
-        esac
-        code=200
-        if [[ "${MOSAIC_TEST_FALLBACK_MODE:-none}" == "inspection" && "$auth_mode" == "token" ]]; then
-            body='{"message":"token rejected"}'
-            code=401
-        fi
-        ;;
-    */pulls/42/merge)
-        body='{}'
-        code=200
-        if [[ "${MOSAIC_TEST_FALLBACK_MODE:-none}" == "merge" && "$auth_mode" == "token" ]]; then
-            body='{"message":"token rejected"}'
-            code=401
-        elif [[ "${MOSAIC_TEST_FALLBACK_MODE:-none}" == "provider-error" ]]; then
-            body='{"message":"branch policy rejected\n\u001b[31m"}'
-            code=409
-        elif [[ "${MOSAIC_TEST_FALLBACK_MODE:-none}" == "forbidden" ]]; then
-            body='{"message":"permission denied"}'
-            code=403
-        else
-            printf '%s' "$data" > "${MOSAIC_TEST_MERGE_PAYLOAD:?}"
-        fi
-        ;;
-    */users/*)
-        body='{"message":"not found"}'
-        code=404
-        ;;
-    *)
-        body='{"message":"unexpected URL"}'
-        code=500
-        ;;
-esac
-
-if [[ -n "$out_file" ]]; then
-    printf '%s' "$body" > "$out_file"
-else
-    printf '%s' "$body"
-fi
-printf '%s' "$code"
-case "${MOSAIC_TEST_CURL_FAILURE:-none}" in
-    oversize) exit 63 ;;
-    stalled) exit 28 ;;
-esac
-SH
-
-    chmod +x "$case_dir/detect-platform.sh" "$case_dir/pr-metadata.sh" \
-        "$case_dir/ci-queue-wait.sh" "$case_dir/bin/curl" "$case_dir/bin/python3"
-    printf '%s\n' "$case_dir"
-}
-
-run_case() {
-    local case_dir="$1" mode="$2"
-    shift 2
-    MOSAIC_TEST_COMMITS_MODE="$mode" \
-    MOSAIC_TEST_CURL_LOG="$case_dir/curl.log" \
-    MOSAIC_TEST_CURL_BOUNDS_LOG="$case_dir/curl-bounds.log" \
-    MOSAIC_TEST_MERGE_PAYLOAD="$case_dir/merge-payload.json" \
-    MOSAIC_TEST_TOKEN_ARGV_MARKER="$case_dir/token-in-argv" \
-    MOSAIC_TEST_BASIC_ARGV_MARKER="$case_dir/basic-in-argv" \
-    MOSAIC_TEST_AUTH_CONFIG_MARKER="$case_dir/auth-via-config" \
-    MOSAIC_TEST_BASIC_CONFIG_MARKER="$case_dir/basic-via-config" \
-    MOSAIC_TEST_TOKEN_RESOLUTION_LOG="$case_dir/token-resolution.log" \
-    MOSAIC_TEST_BASIC_RESOLUTION_LOG="$case_dir/basic-resolution.log" \
-    MOSAIC_TEST_METADATA_ARGV_MARKER="$case_dir/metadata-in-argv" \
-    MOSAIC_TEST_REAL_PYTHON="$(command -v python3)" \
-    AGENT_WORK_ROOT="$case_dir/agent" \
-    PATH="$case_dir/bin:$ORIG_PATH" \
-        "$case_dir/pr-merge.sh" -n 42 "$@"
-}
-
-# Verified multi-author path: the non-poster trailer is built from one commit's
-# linked author.login and that same commit's author email. No /users lookup.
-verified_dir=$(make_case verified)
-set +e
-verified_output=$(run_case "$verified_dir" verified --co-author-trailers --escalate-to tl-mosaic 2>&1)
-verified_rc=$?
-set -e
-if [[ "$verified_rc" -ne 0 ]]; then
-    fail "verified multi-author merge expected rc=0, got rc=$verified_rc: $verified_output"
-elif [[ ! -s "$verified_dir/merge-payload.json" ]]; then
-    fail "verified multi-author merge did not reach the API payload"
-else
-    python3 - "$verified_dir/merge-payload.json" <<'PY' || fail "verified payload did not preserve squash and exact message fields"
-import json
-import sys
-payload = json.load(open(sys.argv[1], encoding="utf-8"))
-assert payload == {
-    "Do": "squash",
-    "head_commit_id": "2222222222222222222222222222222222222222",
-    "MergeTitleField": "Preserve both branch authors",
-    "MergeMessageField": "Co-authored-by: alice <[email protected]>",
-}, payload
-PY
-fi
-[[ -e "$verified_dir/auth-via-config" ]] || fail "verified path did not authenticate curl through stdin config"
-[[ ! -e "$verified_dir/token-in-argv" ]] || fail "verified path placed the Gitea token in curl argv"
-[[ ! -e "$verified_dir/metadata-in-argv" ]] || fail "verified path placed PR title or contributor email in child argv"
-[[ "$(wc -l < "$verified_dir/token-resolution.log")" -eq 1 ]] || fail "verified path did not bind inspection and merge to one credential resolution"
-if grep -q '/users/' "$verified_dir/curl.log" 2>/dev/null; then
-    fail "verified path performed a forbidden second /users lookup"
-fi
-if grep -qv '^1:1:1$' "$verified_dir/curl-bounds.log"; then
-    fail "verified path did not apply size/max-time/connect-time bounds to every provider download"
-fi
-
-# A linked email containing a terminal escape must block before mutation.
-escape_email_dir=$(make_case escape-email)
-set +e
-escape_email_output=$(MOSAIC_TEST_EMAIL_MODE=escape run_case "$escape_email_dir" verified --co-author-trailers --escalate-to tl-mosaic 2>&1)
-escape_email_rc=$?
-set -e
-[[ "$escape_email_rc" -ne 0 ]] || fail "control-byte email unexpectedly passed"
-[[ "$escape_email_output" == *"unusable linked identity"* ]] || fail "control-byte email refusal lost its diagnostic"
-[[ ! -e "$escape_email_dir/merge-payload.json" ]] || fail "control-byte email reached the merge API"
-
-# Curl transfer and duration failures must remain failures even with HTTP 200.
-for failure_mode in oversize stalled; do
-    failure_dir=$(make_case "curl-$failure_mode")
-    set +e
-    failure_output=$(MOSAIC_TEST_CURL_FAILURE="$failure_mode" run_case "$failure_dir" verified --co-author-trailers --escalate-to tl-mosaic 2>&1)
-    failure_rc=$?
-    set -e
-    [[ "$failure_rc" -ne 0 ]] || fail "curl $failure_mode failure was discarded: $failure_output"
-    [[ ! -e "$failure_dir/merge-payload.json" ]] || fail "curl $failure_mode failure reached the merge API"
-done
-
-# The authenticated head is re-read under the mutation credential but cannot
-# replace the canonical preflight/review head. A move blocks before enumeration
-# or mutation even though the provider returned a valid new SHA.
-moved_dir=$(make_case moved-head)
-set +e
-moved_output=$(MOSAIC_TEST_HEAD_MODE=moved \
-    run_case "$moved_dir" verified --co-author-trailers --escalate-to tl-mosaic 2>&1)
-moved_rc=$?
-set -e
-[[ "$moved_rc" -ne 0 ]] || fail "moved authenticated head unexpectedly passed"
-[[ "$moved_output" == *"authenticated PR head moved from reviewed"* ]] || fail "moved head refusal lost its diagnostic"
-[[ "$moved_output" == *"tl-mosaic"* ]] || fail "moved head refusal omitted the named escalation principal"
-[[ ! -e "$moved_dir/merge-payload.json" ]] || fail "moved head refusal reached the merge API"
-moved_sequence=$(awk '{print $1 ":" $2}' "$moved_dir/curl.log" | paste -sd, -)
-[[ "$moved_sequence" == "GET:token" ]] || fail "moved head refusal performed post-move inspection/mutation (calls=$moved_sequence)"
-
-# Token resolution failure is not an authentication response. It must fail
-# closed instead of borrowing a Basic credential under a different principal.
-token_missing_dir=$(make_case token-missing)
-set +e
-token_missing_output=$(MOSAIC_TEST_TOKEN_AVAILABLE=false MOSAIC_TEST_BASIC_AVAILABLE=true \
-    run_case "$token_missing_dir" single 2>&1)
-token_missing_rc=$?
-set -e
-[[ "$token_missing_rc" -ne 0 ]] || fail "missing token unexpectedly borrowed Basic Auth"
-[[ "$token_missing_output" == *"required Gitea token"* ]] || fail "missing token refusal lost its diagnostic"
-[[ ! -e "$token_missing_dir/basic-resolution.log" ]] || fail "missing token resolved Basic Auth after identity failure"
-[[ ! -e "$token_missing_dir/curl.log" ]] || fail "missing token reached a provider request"
-
-# A failed Basic resolver must never use its nonempty output or reach mutation.
-basic_rc_dir=$(make_case basic-resolver-rc)
-set +e
-basic_rc_output=$(MOSAIC_TEST_BASIC_AVAILABLE=true MOSAIC_TEST_BASIC_RC=91 MOSAIC_TEST_FALLBACK_MODE=inspection \
-    run_case "$basic_rc_dir" verified --co-author-trailers --escalate-to tl-mosaic 2>&1)
-basic_rc_rc=$?
-set -e
-[[ "$basic_rc_rc" -ne 0 ]] || fail "failed Basic resolver output unexpectedly authorized a merge: $basic_rc_output"
-[[ ! -e "$basic_rc_dir/merge-payload.json" ]] || fail "failed Basic resolver reached the merge API"
-
-# HTTP 401 never changes principals: inspection rejection fails closed without
-# resolving or attempting Basic Auth.
-fallback_inspect_dir=$(make_case fallback-inspection)
-set +e
-fallback_inspect_output=$(MOSAIC_TEST_BASIC_AVAILABLE=true MOSAIC_TEST_FALLBACK_MODE=inspection \
-    run_case "$fallback_inspect_dir" verified --co-author-trailers --escalate-to tl-mosaic 2>&1)
-fallback_inspect_rc=$?
-set -e
-[[ "$fallback_inspect_rc" -ne 0 ]] || fail "inspection token rejection unexpectedly changed principals"
-[[ "$fallback_inspect_output" == *"refusing cross-principal credential fallback"* ]] || fail "inspection token rejection lost its refusal diagnostic"
-[[ ! -e "$fallback_inspect_dir/basic-resolution.log" ]] || fail "inspection token rejection resolved Basic Auth"
-[[ ! -e "$fallback_inspect_dir/merge-payload.json" ]] || fail "inspection token rejection reached merge mutation"
-inspect_sequence=$(awk '{print $1 ":" $2}' "$fallback_inspect_dir/curl.log" | paste -sd, -)
-[[ "$inspect_sequence" == "GET:token" ]] || fail "inspection rejection made unexpected provider calls (calls=$inspect_sequence)"
-
-# Token rejection at merge likewise fails closed without cross-principal retry.
-fallback_merge_dir=$(make_case fallback-merge)
-set +e
-fallback_merge_output=$(MOSAIC_TEST_BASIC_AVAILABLE=true MOSAIC_TEST_FALLBACK_MODE=merge \
-    run_case "$fallback_merge_dir" verified --co-author-trailers --escalate-to tl-mosaic 2>&1)
-fallback_merge_rc=$?
-set -e
-[[ "$fallback_merge_rc" -ne 0 ]] || fail "merge token rejection unexpectedly changed principals"
-[[ "$fallback_merge_output" == *"refusing cross-principal credential fallback"* ]] || fail "merge token rejection lost its refusal diagnostic"
-[[ ! -e "$fallback_merge_dir/basic-resolution.log" ]] || fail "merge token rejection resolved Basic Auth"
-[[ ! -e "$fallback_merge_dir/merge-payload.json" ]] || fail "merge token rejection recorded a successful payload"
-merge_sequence=$(awk '{print $1 ":" $2}' "$fallback_merge_dir/curl.log" | paste -sd, -)
-[[ "$merge_sequence" == "GET:token,GET:token,POST:token" ]] || fail "merge rejection made unexpected provider calls (calls=$merge_sequence)"
-
-# BLOCK path: a commit email exists but author.login is null. It must name both
-# facts, name the escalation principal, and never reach the merge endpoint.
-null_dir=$(make_case null-login)
-set +e
-null_output=$(run_case "$null_dir" null-login --co-author-trailers --escalate-to tl-mosaic 2>&1)
-null_rc=$?
-set -e
-[[ "$null_rc" -ne 0 ]] || fail "null-login author expected a non-zero BLOCK"
-[[ "$null_output" == *"BLOCK"* ]] || fail "null-login author omitted BLOCK diagnostic"
-[[ "$null_output" == *"author.login=NULL"* ]] || fail "null-login author omitted the null provider fact"
-[[ "$null_output" == *"[email protected]"* ]] || fail "null-login author omitted the commit email fact"
-[[ "$null_output" == *'\n\x1b[31m'* ]] || fail "null-login author diagnostic did not escape control characters"
-[[ "$null_output" != *$'\033'* ]] || fail "null-login author diagnostic emitted a raw terminal escape"
-[[ "$(printf '%s\n' "$null_output" | wc -l)" -eq 1 ]] || fail "null-login author diagnostic permitted newline injection"
-[[ "$null_output" == *"tl-mosaic"* ]] || fail "null-login author omitted the named escalation principal"
-[[ ! -e "$null_dir/merge-payload.json" ]] || fail "null-login BLOCK still reached the merge API"
-
-# Every provider-derived field in alternate BLOCK diagnostics is log-safe too,
-# including an invalid non-head SHA that contains control characters.
-unsafe_dir=$(make_case unsafe-identity)
-set +e
-unsafe_output=$(run_case "$unsafe_dir" unsafe-identity --co-author-trailers --escalate-to tl-mosaic 2>&1)
-unsafe_rc=$?
-set -e
-[[ "$unsafe_rc" -ne 0 ]] || fail "unsafe identity expected a non-zero BLOCK"
-[[ "$unsafe_output" == *"unusable linked identity"* ]] || fail "unsafe identity omitted its BLOCK reason"
-[[ "$unsafe_output" == *'\n\x1b[31m'* ]] || fail "unsafe identity SHA did not escape control characters"
-[[ "$unsafe_output" != *$'\033'* ]] || fail "unsafe identity diagnostic emitted a raw terminal escape"
-[[ "$(printf '%s\n' "$unsafe_output" | wc -l)" -eq 1 ]] || fail "unsafe identity diagnostic permitted newline injection"
-[[ ! -e "$unsafe_dir/merge-payload.json" ]] || fail "unsafe identity BLOCK still reached the merge API"
-
-# The provider PR title cannot add an unchecked trailer outside the constructed
-# message field: multi-line and trailer-shaped titles block before mutation.
-title_dir=$(make_case title-injection)
-set +e
-title_output=$(MOSAIC_TEST_TITLE_MODE=injection \
-    run_case "$title_dir" verified --co-author-trailers --escalate-to tl-mosaic 2>&1)
-title_rc=$?
-set -e
-[[ "$title_rc" -ne 0 ]] || fail "title trailer injection unexpectedly passed"
-[[ "$title_output" == *"not one printable, non-trailer line"* ]] || fail "title injection refusal lost its diagnostic"
-[[ ! -e "$title_dir/merge-payload.json" ]] || fail "title injection reached the merge API"
-
-# Provider failures remain diagnosable after their temporary response file is
-# removed, but provider-controlled control characters stay log-safe.
-error_dir=$(make_case provider-error)
-set +e
-error_output=$(MOSAIC_TEST_BASIC_AVAILABLE=true MOSAIC_TEST_FALLBACK_MODE=provider-error \
-    run_case "$error_dir" single 2>&1)
-error_rc=$?
-set -e
-[[ "$error_rc" -ne 0 ]] || fail "provider error unexpectedly passed"
-[[ "$error_output" == *"HTTP 409"* ]] || fail "provider error omitted the HTTP status"
-[[ "$error_output" == *"branch policy rejected"* ]] || fail "provider error response was discarded"
-[[ "$error_output" == *'\n\x1b[31m'* ]] || fail "provider error response did not escape control characters"
-[[ "$error_output" != *$'\033'* ]] || fail "provider error response emitted a raw terminal escape"
-[[ "$error_output" != *"Basic Auth fallback"* ]] || fail "provider error advertised removed Basic Auth fallback"
-[[ ! -e "$error_dir/basic-resolution.log" ]] || fail "HTTP 409 policy denial incorrectly triggered Basic Auth fallback"
-
-# Authorization denials likewise fail closed instead of changing principals.
-forbidden_dir=$(make_case forbidden)
-set +e
-forbidden_output=$(MOSAIC_TEST_BASIC_AVAILABLE=true MOSAIC_TEST_FALLBACK_MODE=forbidden \
-    run_case "$forbidden_dir" single 2>&1)
-forbidden_rc=$?
-set -e
-[[ "$forbidden_rc" -ne 0 ]] || fail "HTTP 403 authorization denial unexpectedly passed"
-[[ "$forbidden_output" == *"HTTP 403"* ]] || fail "authorization denial omitted the HTTP status"
-[[ "$forbidden_output" != *"Basic Auth fallback"* ]] || fail "authorization denial advertised removed Basic Auth fallback"
-[[ ! -e "$forbidden_dir/basic-resolution.log" ]] || fail "HTTP 403 authorization denial incorrectly triggered Basic Auth fallback"
-
-# The BLOCK destination cannot be generic or inferred after failure: opting in
-# without a named principal is refused before any provider operation.
-principal_dir=$(make_case missing-principal)
-set +e
-principal_output=$(run_case "$principal_dir" verified --co-author-trailers 2>&1)
-principal_rc=$?
-set -e
-[[ "$principal_rc" -ne 0 ]] || fail "co-author mode without a named principal unexpectedly passed"
-[[ "$principal_output" == *"requires --escalate-to with a named principal"* ]] || fail "missing-principal refusal lost its diagnostic"
-[[ ! -e "$principal_dir/merge-payload.json" ]] || fail "missing-principal refusal reached the merge API"
-
-# A trailing value-taking option receives a stable CLI diagnostic instead of a
-# set -u unbound-variable crash.
-value_dir=$(make_case missing-principal-value)
-set +e
-value_output=$(run_case "$value_dir" verified --co-author-trailers --escalate-to 2>&1)
-value_rc=$?
-set -e
-[[ "$value_rc" -ne 0 ]] || fail "missing --escalate-to value unexpectedly passed"
-[[ "$value_output" == *"--escalate-to requires one principal name"* ]] || fail "missing --escalate-to value lost its diagnostic"
-[[ "$value_output" != *"unbound variable"* ]] || fail "missing --escalate-to value crashed under set -u"
-[[ ! -e "$value_dir/merge-payload.json" ]] || fail "missing --escalate-to value reached the merge API"
-
-# Negative control: ordinary single-author merge remains byte-for-byte payload
-# compatible and hardcoded to squash, with no optional message fields.
-single_dir=$(make_case single)
-set +e
-single_output=$(run_case "$single_dir" single 2>&1)
-single_rc=$?
-set -e
-if [[ "$single_rc" -ne 0 ]]; then
-    fail "ordinary single-author merge expected rc=0, got rc=$single_rc: $single_output"
-elif [[ ! -s "$single_dir/merge-payload.json" ]]; then
-    fail "ordinary single-author merge did not reach the API payload"
-else
-    python3 - "$single_dir/merge-payload.json" <<'PY' || fail "ordinary single-author payload changed"
-import json
-import sys
-payload = json.load(open(sys.argv[1], encoding="utf-8"))
-assert payload == {
-    "Do": "squash",
-    "head_commit_id": "1111111111111111111111111111111111111111",
-}, payload
-PY
-fi
-[[ -e "$single_dir/auth-via-config" ]] || fail "ordinary path did not authenticate curl through stdin config"
-[[ ! -e "$single_dir/token-in-argv" ]] || fail "ordinary path placed the Gitea token in curl argv"
-[[ "$(wc -l < "$single_dir/token-resolution.log")" -eq 1 ]] || fail "ordinary path did not use exactly one credential resolution"
-
-# Squash is not defaultable: an explicit non-squash method must remain refused.
-method_dir=$(make_case method-refusal)
-set +e
-method_output=$(run_case "$method_dir" single -m merge 2>&1)
-method_rc=$?
-set -e
-[[ "$method_rc" -ne 0 ]] || fail "non-squash method unexpectedly passed"
-[[ "$method_output" == *"enforces squash merge only"* ]] || fail "non-squash refusal lost its policy diagnostic"
-[[ ! -e "$method_dir/merge-payload.json" ]] || fail "non-squash refusal reached the merge API"
-
-if [[ "$failures" -ne 0 ]]; then
-    echo "pr-merge message-field regression failed ($failures assertions)" >&2
-    exit 1
-fi
-
-echo "pr-merge message-field regression passed (verified, BLOCK, and unchanged squash control)"
@@ -32,6 +32,7 @@ packages/mosaic/framework/tools/tmux/test-send-message-socket.sh | requires a re
 packages/mosaic/framework/tools/tmux/test-send-message-verdict.sh | requires real tmux-pane fixtures on a throwaway socket; CI image ships no tmux; #1017 burndown (same condition as its sibling)

 # --- single-suite directories: unmeasured in CI ---
+packages/mosaic/framework/tools/fleet/test-start-agent-session.sh | unmeasured in CI image; stubs tmux via a fake bin dir, likely CI-fit; #1017 burndown
 packages/mosaic/framework/tools/glpi/test-list-http-status.sh | unmeasured in CI image; stub-based (#807 regression harness), likely CI-fit; #1017 burndown
 packages/mosaic/framework/tools/orchestrator/test-board-roll.sh | unmeasured in CI image; file-fixture based, likely CI-fit; #1017 burndown
 packages/mosaic/framework/tools/woodpecker/test-ci-wait-exit-matrix.sh | unmeasured in CI image; drives ci-wait.sh against a stub pipeline-status.sh, likely CI-fit; #1017 burndown
@@ -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 && bash framework/tools/fleet/test-start-agent-session.sh && bash framework/systemd/user/test-fleet-units.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-pr-merge-message-field.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:*",
@@ -23,6 +23,7 @@ import { registerSkillCommand } from './commands/skill.js';
 import { registerLaunchCommands } from './commands/launch.js';
 import { registerLeaseCapabilityProbe } from './commands/lease-activation-probe.js';
 import { registerInstallOrderingGuardCommand } from './commands/install-ordering-guard.js';
+import { registerBrainProvisionCommand } from './commands/brain-provision-command.js';
 import { registerAuthCommand } from './commands/auth.js';
 import { registerFederationCommand } from './commands/federation.js';
 import { registerGatewayCommand } from './commands/gateway.js';
@@ -85,6 +86,10 @@ registerLeaseCapabilityProbe(program);

 registerInstallOrderingGuardCommand(program);

+// ─── durable brain P7 provisioner (hidden; #1051) ───────────────────────
+
+registerBrainProvisionCommand(program);
+
 // ─── login ──────────────────────────────────────────────────────────────

 program
@@ -0,0 +1,272 @@
+import { afterEach, describe, expect, it } from 'vitest';
+import { mkdirSync, mkdtempSync, readFileSync, rmSync, writeFileSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+
+interface CommandRequest {
+  readonly program: 'git' | 'mosaic';
+  readonly args: readonly string[];
+  readonly env: Readonly<Record<string, string>>;
+}
+
+interface CommandResult {
+  readonly status: number;
+  readonly stdout: string;
+  readonly stderr: string;
+}
+
+interface InstalledDoctorResult {
+  readonly status: 'ok' | 'warn' | 'error';
+  readonly findings: readonly {
+    readonly code: string;
+    readonly reasonCode: string | null;
+  }[];
+  readonly lines: readonly string[];
+}
+
+interface BrainDoctorModule {
+  runInstalledBrainDoctorCheck(
+    options: {
+      readonly mosaicHome: string;
+      readonly home: string;
+      readonly identity?: string;
+      readonly fix: boolean;
+    },
+    run: (request: CommandRequest) => CommandResult,
+  ): InstalledDoctorResult;
+}
+
+const MODULE_PATH = './brain-doctor-check.js';
+const roots: string[] = [];
+
+async function loadDoctor(requirement: string): Promise<BrainDoctorModule> {
+  try {
+    return (await import(MODULE_PATH)) as BrainDoctorModule;
+  } catch (error: unknown) {
+    const detail = error instanceof Error ? error.message : String(error);
+    throw new Error(`${requirement}: installed brain doctor check is absent (${detail})`);
+  }
+}
+
+function tempRoot(): string {
+  const root = mkdtempSync(join(tmpdir(), 'mosaic-brain-doctor-'));
+  roots.push(root);
+  return root;
+}
+
+function installConfig(root: string): { readonly home: string; readonly mosaicHome: string } {
+  const home = join(root, 'home');
+  const mosaicHome = join(home, '.config', 'mosaic');
+  mkdirSync(join(mosaicHome, 'cred'), { recursive: true });
+  mkdirSync(join(mosaicHome, 'brain'), { recursive: true });
+  writeFileSync(
+    join(mosaicHome, 'cred', 'estates.json'),
+    JSON.stringify({
+      version: 1,
+      estates: [
+        {
+          name: 'homelab',
+          readOnlyControlIdentity: 'read-control',
+          hosts: [
+            {
+              host: 'git.example.invalid',
+              provider: 'gitea',
+              apiBaseUrl: 'https://git.example.invalid',
+              tokenPrefix: 'gitea-example',
+            },
+          ],
+        },
+      ],
+    }),
+    { mode: 0o600 },
+  );
+  writeFileSync(
+    join(mosaicHome, 'brain', 'owners.json'),
+    JSON.stringify({
+      version: 1,
+      estates: [
+        {
+          estate: 'homelab',
+          laneArchiveOwners: [{ kind: 'provider-user', login: 'durable-owner' }],
+          standingProcess: { kind: 'glpi-queue', queue: 'mosaic-brain-remediation' },
+          controls: { publicIdentity: 'public-control', privateIdentity: 'private-control' },
+        },
+      ],
+    }),
+    { mode: 0o600 },
+  );
+  writeFileSync(
+    join(mosaicHome, '.install-manifest.json'),
+    JSON.stringify({
+      version: 2,
+      status: 'committed',
+      sourceRepo: 'https://git.example.invalid/example/stack.git',
+    }),
+    { mode: 0o600 },
+  );
+  return { home, mosaicHome };
+}
+
+function validateResult(outcome: 'ok' | 'refused' | 'indeterminate', reasonCode: string): string {
+  const exitCode = outcome === 'ok' ? 0 : outcome === 'refused' ? 10 : 30;
+  return JSON.stringify({
+    schemaVersion: 1,
+    operation: 'validate',
+    outcome,
+    exitCode,
+    retryable: false,
+    subject: {
+      identity: 'seat-a',
+      estate: 'homelab',
+      host: 'git.example.invalid',
+      repo: 'durable-owner/mosaic-brain',
+    },
+    mutation: 'none',
+    reason: { code: reasonCode, message: 'non-secret' },
+    evidence: {
+      providerIdentity:
+        outcome === 'ok'
+          ? {
+              login: 'seat-a',
+              endpoint: 'GET /api/v1/user',
+              contentType: 'application/json',
+            }
+          : null,
+      repositoryPermission:
+        outcome === 'ok'
+          ? {
+              requested: 'write',
+              effective: 'write',
+              endpoint: 'GET /api/v1/repos/durable-owner/mosaic-brain',
+              contentType: 'application/json',
+            }
+          : null,
+      writeDifferential:
+        outcome === 'ok'
+          ? {
+              state: 'can-write',
+              credentialBinding: 'same-resolution',
+              transportPrincipal: 'seat-a',
+              authenticatedReceivePack: 'advertised',
+              readOnlyControl: {
+                identity: 'read-control',
+                providerPermission: 'read',
+                receivePack: 'refused',
+              },
+              unauthenticatedReceivePack: 'refused',
+              artifactCreated: false,
+              proves: 'non-secret evidence',
+              doesNotProve: 'branch update acceptance',
+            }
+          : null,
+    },
+    audit: { journalId: 'opaque', state: 'sealed' },
+  });
+}
+
+afterEach((): void => {
+  for (const root of roots.splice(0)) rmSync(root, { recursive: true, force: true });
+});
+
+describe('installed mosaic doctor brain checks', (): void => {
+  it('derives the target from the committed install manifest and surfaces a missing clone plus refusal', async (): Promise<void> => {
+    const doctor = await loadDoctor('MB-REQ-08 installed doctor missing clone');
+    const config = installConfig(tempRoot());
+    const requests: CommandRequest[] = [];
+
+    const result = doctor.runInstalledBrainDoctorCheck(
+      { ...config, identity: 'seat-a', fix: false },
+      (request): CommandResult => {
+        requests.push(request);
+        return {
+          status: 10,
+          stdout: validateResult('refused', 'no-token-for-identity'),
+          stderr: 'refused reason=no-token-for-identity',
+        };
+      },
+    );
+
+    expect(result.status).toBe('warn');
+    expect(result.findings.map((finding) => finding.code)).toEqual(
+      expect.arrayContaining(['brain-clone-missing', 'brain-write-access-refused']),
+    );
+    expect(result.lines.join('\n')).toMatch(/brain-clone-missing/);
+    expect(result.lines.join('\n')).toMatch(/no-token-for-identity/);
+    expect(requests[0]?.args).toContain('durable-owner/mosaic-brain');
+  });
+
+  it('fails closed without an explicit identity and performs no command', async (): Promise<void> => {
+    const doctor = await loadDoctor('MB-REQ-08 explicit identity');
+    const config = installConfig(tempRoot());
+    let calls = 0;
+
+    const result = doctor.runInstalledBrainDoctorCheck(
+      { ...config, fix: false },
+      (): CommandResult => {
+        calls += 1;
+        return { status: 0, stdout: '', stderr: '' };
+      },
+    );
+
+    expect(result).toMatchObject({
+      status: 'error',
+      findings: [{ code: 'brain-identity-required', reasonCode: 'identity-required' }],
+    });
+    expect(calls).toBe(0);
+  });
+
+  it('treats identity-not-measured as an error, not no-write refusal and not a repairable grant case', async (): Promise<void> => {
+    const doctor = await loadDoctor('MB-REQ-08 identity measurement axis');
+    const config = installConfig(tempRoot());
+    const requests: CommandRequest[] = [];
+
+    const result = doctor.runInstalledBrainDoctorCheck(
+      { ...config, identity: 'seat-a', fix: true },
+      (request): CommandResult => {
+        requests.push(request);
+        return {
+          status: 30,
+          stdout: validateResult('indeterminate', 'identity-not-measured'),
+          stderr: 'identity not measured',
+        };
+      },
+    );
+
+    expect(result.status).toBe('error');
+    expect(result.findings).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          code: 'brain-write-access-indeterminate',
+          reasonCode: 'identity-not-measured',
+        }),
+      ]),
+    );
+    expect(requests.some((request) => request.args.includes('grant'))).toBe(false);
+  });
+
+  it('is wired into the top-level mosaic doctor path before the shell audit runs', (): void => {
+    const launch = readFileSync(join(process.cwd(), 'src', 'commands', 'launch.ts'), 'utf8');
+
+    expect(launch).toContain('runInstalledBrainDoctorCheck');
+    expect(launch).toContain('defaultInstalledBrainDoctorOptions');
+    expect(launch).toContain('systemCommandRunner');
+    expect(launch).toMatch(/brainCheckFailed[\s\S]*runDoctorScriptAndExit/);
+  });
+
+  it('reports a missing or unsafe registry/manifest as configuration error rather than defaulting estate', async (): Promise<void> => {
+    const doctor = await loadDoctor('MB-REQ-02 missing mapping fail-closed');
+    const root = tempRoot();
+    const home = join(root, 'home');
+    const mosaicHome = join(home, '.config', 'mosaic');
+    mkdirSync(mosaicHome, { recursive: true });
+
+    const result = doctor.runInstalledBrainDoctorCheck(
+      { home, mosaicHome, identity: 'seat-a', fix: false },
+      (): CommandResult => ({ status: 0, stdout: '', stderr: '' }),
+    );
+
+    expect(result.status).toBe('error');
+    expect(result.findings[0]?.code).toMatch(/brain-(estate-registry|install-manifest)-/);
+    expect(result.lines.join('\n')).not.toMatch(/homelab|usc/);
+  });
+});
@@ -0,0 +1,152 @@
+import { homedir } from 'node:os';
+import { join } from 'node:path';
+import { z } from 'zod';
+import { readBrainConfigSecure } from './brain-secure-config.js';
+import { resolveBrainOwnerPolicy } from './brain-owner-resolver.js';
+import { deriveBrainTarget } from './brain-store.js';
+import {
+  collectBrainDoctorReport,
+  repairBrainDoctor,
+  type CommandRunner,
+  type DoctorRuntimeReport,
+} from './brain-store-runtime.js';
+
+const IDENTITY = /^[A-Za-z0-9][A-Za-z0-9_.-]*$/;
+const manifestSchema = z
+  .object({
+    version: z.literal(2),
+    status: z.literal('committed'),
+    sourceRepo: z.string().min(1),
+  })
+  .passthrough();
+
+export interface InstalledDoctorFinding {
+  readonly code: string;
+  readonly reasonCode: string | null;
+}
+
+export interface InstalledDoctorResult {
+  readonly status: 'ok' | 'warn' | 'error';
+  readonly findings: readonly InstalledDoctorFinding[];
+  readonly lines: readonly string[];
+}
+
+function configurationError(code: string, reasonCode = code): InstalledDoctorResult {
+  return {
+    status: 'error',
+    findings: [{ code, reasonCode }],
+    lines: [`[mosaic-doctor] [ERROR] ${code}`],
+  };
+}
+
+function renderReport(report: DoctorRuntimeReport): InstalledDoctorResult {
+  const findings = report.findings.map(
+    (finding): InstalledDoctorFinding => ({
+      code: finding.code,
+      reasonCode: finding.reasonCode,
+    }),
+  );
+  const hard = findings.some(
+    (finding): boolean =>
+      finding.code.endsWith('-error') ||
+      finding.code.endsWith('-indeterminate') ||
+      finding.code === 'brain-not-git-repository' ||
+      finding.code === 'brain-root-permissions-unsafe',
+  );
+  const status: InstalledDoctorResult['status'] =
+    findings.length === 0 ? 'ok' : hard ? 'error' : 'warn';
+  const severity = status === 'error' ? 'ERROR' : status === 'warn' ? 'WARN' : 'OK';
+  const lines =
+    findings.length === 0
+      ? ['[mosaic-doctor] [OK] mosaic-brain ready']
+      : findings.map(
+          (finding): string =>
+            `[mosaic-doctor] [${severity}] ${finding.code}${
+              finding.reasonCode === null ? '' : ` reason=${finding.reasonCode}`
+            }`,
+        );
+  return { status, findings, lines };
+}
+
+export function runInstalledBrainDoctorCheck(
+  options: {
+    readonly mosaicHome: string;
+    readonly home: string;
+    readonly identity?: string;
+    readonly fix: boolean;
+  },
+  run: CommandRunner,
+): InstalledDoctorResult {
+  if (options.identity === undefined || !IDENTITY.test(options.identity)) {
+    return configurationError('brain-identity-required', 'identity-required');
+  }
+
+  const registryPath = join(options.mosaicHome, 'cred', 'estates.json');
+  const manifestPath = join(options.mosaicHome, '.install-manifest.json');
+  const ownerPolicyPath = join(options.mosaicHome, 'brain', 'owners.json');
+  let registrySource: string;
+  try {
+    registrySource = readBrainConfigSecure(registryPath, options.mosaicHome);
+  } catch {
+    return configurationError('brain-estate-registry-unavailable');
+  }
+  let manifestSource: string;
+  try {
+    manifestSource = readBrainConfigSecure(manifestPath, options.mosaicHome);
+  } catch {
+    return configurationError('brain-install-manifest-unavailable');
+  }
+  let manifestRaw: unknown;
+  try {
+    manifestRaw = JSON.parse(manifestSource);
+  } catch {
+    return configurationError('brain-install-manifest-invalid');
+  }
+  const manifest = manifestSchema.safeParse(manifestRaw);
+  if (!manifest.success) return configurationError('brain-install-manifest-invalid');
+  let ownerPolicySource: string;
+  try {
+    ownerPolicySource = readBrainConfigSecure(ownerPolicyPath, options.mosaicHome);
+  } catch {
+    return configurationError('brain-owner-policy-unavailable');
+  }
+  let preliminaryTarget: ReturnType<typeof deriveBrainTarget>;
+  try {
+    preliminaryTarget = deriveBrainTarget(registrySource, manifest.data.sourceRepo, 'policy-probe');
+  } catch {
+    return configurationError('brain-estate-registry-invalid');
+  }
+  const ownerPolicy = resolveBrainOwnerPolicy(ownerPolicySource, preliminaryTarget.estate);
+  if (ownerPolicy === undefined) return configurationError('brain-owner-policy-invalid');
+
+  const input = {
+    registrySource,
+    targetGitUrl: manifest.data.sourceRepo,
+    brainNamespace: ownerPolicy.brainNamespace,
+    identity: options.identity,
+    root: join(options.home, '.mosaic'),
+  };
+  try {
+    return renderReport(
+      options.fix ? repairBrainDoctor(input, run) : collectBrainDoctorReport(input, run),
+    );
+  } catch {
+    return configurationError('brain-estate-registry-invalid');
+  }
+}
+
+export function defaultInstalledBrainDoctorOptions(fix: boolean): {
+  readonly mosaicHome: string;
+  readonly home: string;
+  readonly identity?: string;
+  readonly fix: boolean;
+} {
+  const home = homedir();
+  const identity = process.env['MOSAIC_GIT_IDENTITY'];
+  return {
+    mosaicHome: process.env['MOSAIC_HOME'] ?? join(home, '.config', 'mosaic'),
+    home,
+    ...(identity === undefined ? {} : { identity }),
+    fix,
+  };
+}
@@ -0,0 +1,54 @@
+import { describe, expect, it } from 'vitest';
+import { readFileSync } from 'node:fs';
+import { join } from 'node:path';
+
+function installerSource(): string {
+  return readFileSync(join(process.cwd(), '..', '..', 'tools', 'install.sh'), 'utf8');
+}
+
+describe('root installer P7 durable-brain integration', (): void => {
+  it('records the configured source repository in the committed manifest for doctor derivation', (): void => {
+    const installer = installerSource();
+
+    expect(installer).toContain('sourceRepo:');
+    expect(installer).toMatch(/sourceRepo:\s*process\.argv\[/);
+    expect(installer).toMatch(/MANIFEST_SOURCE_REPO/);
+  });
+
+  it('invokes the broker-only provision command in P7 with explicit owner and refusal controls', (): void => {
+    const installer = installerSource();
+    const provision = installer.indexOf('__brain-provision');
+    const p7 = installer.indexOf('state_phase_begin P7');
+
+    expect(provision).toBeGreaterThan(-1);
+    expect(p7).toBeGreaterThan(-1);
+    expect(provision).toBeGreaterThan(p7);
+    for (const flag of [
+      '--identity',
+      '--target-url',
+      '--owner',
+      '--refusal-identity',
+      '--lane',
+      '--owner-policy',
+    ]) {
+      expect(installer).toContain(flag);
+    }
+    expect(installer).not.toMatch(/__brain-provision[^\n]*(?:token|password|authorization)/i);
+  });
+
+  it('journals ~/.mosaic and the owner policy as P7 mutations and checks the resulting object', (): void => {
+    const installer = installerSource();
+
+    expect(installer).toContain('state_record_mutation P7 "$HOME/.mosaic"');
+    expect(installer).toContain('state_record_mutation P7 "$MOSAIC_HOME/brain/owners.json"');
+    expect(installer).toMatch(/P7\)[\s\S]*\.mosaic[\s\S]*(?:remote|get-url)[\s\S]*main/);
+  });
+
+  it('discovers every legacy lane directory rather than silently migrating only one lane', (): void => {
+    const installer = installerSource();
+
+    expect(installer).toMatch(/memory\/lanes/);
+    expect(installer).toMatch(/for\s+[^\n]*lane/);
+    expect(installer).toMatch(/__brain-provision[\s\S]*--lane/);
+  });
+});
@@ -0,0 +1,373 @@
+import { describe, expect, it } from 'vitest';
+
+/**
+ * Red-first owner-authority resolver contract for #1051.
+ *
+ * Fixtures are operator-agnostic. The HOMELAB owner name belongs in the local
+ * estate policy, never in framework source. Anonymous lookup is intentional:
+ * the ruled owner class is PUBLIC and least-privilege seats may lack read:user.
+ */
+
+interface MigrationOwnerResolution {
+  readonly verdict: 'resolved' | 'refused' | 'not-measured';
+  readonly reasonCode: string;
+  readonly principal: {
+    readonly name: string;
+    readonly kind: 'durable-human';
+  } | null;
+  readonly authority: {
+    readonly system: 'gitea';
+    readonly endpoint: string;
+    readonly contentType: 'application/json';
+  } | null;
+}
+
+type FetchLike = (input: string | URL | Request, init?: RequestInit) => Promise<Response>;
+
+interface OwnerResolverModule {
+  resolveProviderDurableOwner(
+    input: {
+      readonly estateRegistrySource: string;
+      readonly ownerPolicySource: string;
+      readonly host: string;
+      readonly requestedOwner: string;
+    },
+    dependencies: {
+      readonly fetch: FetchLike;
+      readonly absentControlName: () => string;
+    },
+  ): Promise<MigrationOwnerResolution>;
+}
+
+const MODULE_PATH = './brain-owner-resolver.js';
+
+async function loadResolver(requirement: string): Promise<OwnerResolverModule> {
+  try {
+    return (await import(MODULE_PATH)) as OwnerResolverModule;
+  } catch (error: unknown) {
+    const detail = error instanceof Error ? error.message : String(error);
+    throw new Error(`${requirement}: brain owner resolver is absent (${detail})`);
+  }
+}
+
+function estateRegistry(): string {
+  return JSON.stringify({
+    version: 1,
+    estates: [
+      {
+        name: 'homelab',
+        readOnlyControlIdentity: 'read-control',
+        hosts: [
+          {
+            host: 'git.example.invalid',
+            provider: 'gitea',
+            apiBaseUrl: 'https://git.example.invalid',
+            tokenPrefix: 'gitea-example',
+          },
+        ],
+      },
+    ],
+  });
+}
+
+function ownerPolicy(): string {
+  return JSON.stringify({
+    version: 1,
+    estates: [
+      {
+        estate: 'homelab',
+        laneArchiveOwners: [{ kind: 'provider-user', login: 'durable-owner' }],
+        standingProcess: { kind: 'glpi-queue', queue: 'mosaic-brain-remediation' },
+        controls: {
+          publicIdentity: 'public-control',
+          privateIdentity: 'private-control',
+        },
+      },
+    ],
+  });
+}
+
+function jsonResponse(status: number, body: unknown): Response {
+  return new Response(JSON.stringify(body), {
+    status,
+    headers: { 'content-type': 'application/json; charset=utf-8' },
+  });
+}
+
+function publicUser(login: string, active = false): Response {
+  return jsonResponse(200, {
+    id: 42,
+    login,
+    visibility: 'public',
+    active,
+  });
+}
+
+function identityFromUrl(input: string | URL | Request): string {
+  const value = typeof input === 'string' ? input : input instanceof URL ? input.href : input.url;
+  return decodeURIComponent(new URL(value).pathname.split('/').at(-1) ?? '');
+}
+
+function controlledFetch(
+  overrides: Readonly<Record<string, Response>> = {},
+  calls: Array<{ identity: string; authorization: string | null }> = [],
+): FetchLike {
+  return async (input: string | URL | Request, init?: RequestInit): Promise<Response> => {
+    const identity = identityFromUrl(input);
+    const headers = new Headers(init?.headers);
+    calls.push({ identity, authorization: headers.get('authorization') });
+    const override = overrides[identity];
+    if (override !== undefined) return override.clone();
+    if (identity === 'public-control') return publicUser('public-control');
+    if (identity === 'private-control' || identity === 'generated-absent-control') {
+      return jsonResponse(404, { message: 'not found' });
+    }
+    if (identity === 'durable-owner') return publicUser('durable-owner', false);
+    return jsonResponse(404, { message: 'not found' });
+  };
+}
+
+describe('provider-backed durable owner resolver', (): void => {
+  it('resolves an allowlisted PUBLIC owner by exact login with public/private/absent controls and ignores active=false', async (): Promise<void> => {
+    const resolver = await loadResolver('MB-REQ-09 provider owner resolution');
+    const calls: Array<{ identity: string; authorization: string | null }> = [];
+
+    const result = await resolver.resolveProviderDurableOwner(
+      {
+        estateRegistrySource: estateRegistry(),
+        ownerPolicySource: ownerPolicy(),
+        host: 'git.example.invalid',
+        requestedOwner: 'user:durable-owner',
+      },
+      {
+        fetch: controlledFetch({}, calls),
+        absentControlName: (): string => 'generated-absent-control',
+      },
+    );
+
+    expect(result).toEqual({
+      verdict: 'resolved',
+      reasonCode: 'owner-verified',
+      principal: { name: 'user:durable-owner', kind: 'durable-human' },
+      authority: {
+        system: 'gitea',
+        endpoint: 'GET /api/v1/users/durable-owner',
+        contentType: 'application/json',
+      },
+    });
+    expect(calls.map((call) => call.identity)).toEqual([
+      'public-control',
+      'private-control',
+      'generated-absent-control',
+      'durable-owner',
+    ]);
+    expect(calls.every((call) => call.authorization === null)).toBe(true);
+  });
+
+  it('refuses provider redirects and configures a bounded no-redirect request', async (): Promise<void> => {
+    const resolver = await loadResolver('MB-REQ-09 owner lookup SSRF boundary');
+    const requests: RequestInit[] = [];
+
+    const result = await resolver.resolveProviderDurableOwner(
+      {
+        estateRegistrySource: estateRegistry(),
+        ownerPolicySource: ownerPolicy(),
+        host: 'git.example.invalid',
+        requestedOwner: 'user:durable-owner',
+      },
+      {
+        fetch: async (_input, init): Promise<Response> => {
+          requests.push(init ?? {});
+          return new Response(JSON.stringify({ message: 'redirect' }), {
+            status: 302,
+            headers: {
+              'content-type': 'application/json',
+              location: 'http://127.0.0.1/internal',
+            },
+          });
+        },
+        absentControlName: (): string => 'generated-absent-control',
+      },
+    );
+
+    expect(result).toMatchObject({ verdict: 'not-measured', reasonCode: 'owner-control-invalid' });
+    expect(requests).toHaveLength(1);
+    expect(requests[0]?.redirect).toBe('manual');
+    expect(requests[0]?.signal).toBeInstanceOf(AbortSignal);
+  });
+
+  it('cancels a chunked provider body as soon as it exceeds the byte ceiling', async (): Promise<void> => {
+    const resolver = await loadResolver('MB-REQ-09 bounded owner response stream');
+    let cancelled = false;
+    const oversized = new ReadableStream<Uint8Array>({
+      start(controller): void {
+        controller.enqueue(new Uint8Array(200_000));
+        controller.enqueue(new Uint8Array(100_000));
+      },
+      cancel(): void {
+        cancelled = true;
+      },
+    });
+
+    const result = await resolver.resolveProviderDurableOwner(
+      {
+        estateRegistrySource: estateRegistry(),
+        ownerPolicySource: ownerPolicy(),
+        host: 'git.example.invalid',
+        requestedOwner: 'user:durable-owner',
+      },
+      {
+        fetch: async (): Promise<Response> =>
+          new Response(oversized, {
+            status: 200,
+            headers: { 'content-type': 'application/json' },
+          }),
+        absentControlName: (): string => 'generated-absent-control',
+      },
+    );
+
+    expect(result).toMatchObject({
+      verdict: 'not-measured',
+      reasonCode: 'owner-unexpected-provider-shape',
+    });
+    expect(cancelled).toBe(true);
+  });
+
+  it('requires the GLPI standing remediation queue in the local estate policy', async (): Promise<void> => {
+    const resolver = await loadResolver('MB-REQ-09 standing process policy');
+    const raw = JSON.parse(ownerPolicy()) as { estates: Array<Record<string, unknown>> };
+    delete raw.estates[0]?.['standingProcess'];
+    let fetchCalls = 0;
+
+    const result = await resolver.resolveProviderDurableOwner(
+      {
+        estateRegistrySource: estateRegistry(),
+        ownerPolicySource: JSON.stringify(raw),
+        host: 'git.example.invalid',
+        requestedOwner: 'user:durable-owner',
+      },
+      {
+        fetch: async (): Promise<Response> => {
+          fetchCalls += 1;
+          return publicUser('durable-owner');
+        },
+        absentControlName: (): string => 'generated-absent-control',
+      },
+    );
+
+    expect(result).toMatchObject({ verdict: 'refused', reasonCode: 'owner-policy-invalid' });
+    expect(fetchCalls).toBe(0);
+  });
+
+  it('rejects a provider-valid but unlisted principal before provider lookup', async (): Promise<void> => {
+    const resolver = await loadResolver('MB-REQ-09 provider-valid unlisted owner refusal');
+    const calls: Array<{ identity: string; authorization: string | null }> = [];
+
+    const result = await resolver.resolveProviderDurableOwner(
+      {
+        estateRegistrySource: estateRegistry(),
+        ownerPolicySource: ownerPolicy(),
+        host: 'git.example.invalid',
+        requestedOwner: 'user:other-public-user',
+      },
+      {
+        fetch: controlledFetch({ 'other-public-user': publicUser('other-public-user') }, calls),
+        absentControlName: (): string => 'generated-absent-control',
+      },
+    );
+
+    expect(result).toMatchObject({ verdict: 'refused', reasonCode: 'owner-not-allowlisted' });
+    expect(calls).toHaveLength(0);
+  });
+
+  it.each([
+    ['user:durable–owner', 'owner-name-invalid'],
+    [' user:durable-owner ', 'owner-name-invalid'],
+    ['user:durable.owner', 'owner-not-allowlisted'],
+    ['user:durable owner', 'owner-name-invalid'],
+    ['user:ｄurable-owner', 'owner-name-invalid'],
+    ['user:be-coder-07@mission-seat', 'owner-name-invalid'],
+  ] as const)(
+    'rejects non-canonical, unlisted, or transient-seat presentation %s before lookup',
+    async (name, reasonCode): Promise<void> => {
+      const resolver = await loadResolver('MB-REQ-09 owner allowlist grammar');
+      let fetchCalls = 0;
+
+      const result = await resolver.resolveProviderDurableOwner(
+        {
+          estateRegistrySource: estateRegistry(),
+          ownerPolicySource: ownerPolicy(),
+          host: 'git.example.invalid',
+          requestedOwner: name,
+        },
+        {
+          fetch: async (): Promise<Response> => {
+            fetchCalls += 1;
+            return publicUser('durable-owner');
+          },
+          absentControlName: (): string => 'generated-absent-control',
+        },
+      );
+
+      expect(result).toMatchObject({ verdict: 'refused', reasonCode });
+      expect(fetchCalls).toBe(0);
+    },
+  );
+
+  it('fails closed as not-resolvable rather than claiming a private-or-absent owner does not exist', async (): Promise<void> => {
+    const resolver = await loadResolver('MB-REQ-09 private/absent ambiguity');
+
+    const result = await resolver.resolveProviderDurableOwner(
+      {
+        estateRegistrySource: estateRegistry(),
+        ownerPolicySource: ownerPolicy(),
+        host: 'git.example.invalid',
+        requestedOwner: 'user:durable-owner',
+      },
+      {
+        fetch: controlledFetch({ 'durable-owner': jsonResponse(404, { message: 'hidden' }) }),
+        absentControlName: (): string => 'generated-absent-control',
+      },
+    );
+
+    expect(result).toMatchObject({
+      verdict: 'not-measured',
+      reasonCode: 'owner-not-resolvable',
+      principal: null,
+    });
+    expect(JSON.stringify(result)).not.toMatch(/owner-not-found|does-not-exist/);
+  });
+
+  it.each([
+    ['public control hidden', { 'public-control': jsonResponse(404, {}) }],
+    ['public control login mismatch', { 'public-control': publicUser('other') }],
+    ['private control unexpectedly public', { 'private-control': publicUser('private-control') }],
+    [
+      'generated absent control unexpectedly resolves',
+      { 'generated-absent-control': publicUser('generated-absent-control') },
+    ],
+  ] as const)(
+    'makes the whole result not-measured when %s',
+    async (_caseName, overrides): Promise<void> => {
+      const resolver = await loadResolver('MB-REQ-09 owner resolver controls');
+
+      const result = await resolver.resolveProviderDurableOwner(
+        {
+          estateRegistrySource: estateRegistry(),
+          ownerPolicySource: ownerPolicy(),
+          host: 'git.example.invalid',
+          requestedOwner: 'user:durable-owner',
+        },
+        {
+          fetch: controlledFetch(overrides),
+          absentControlName: (): string => 'generated-absent-control',
+        },
+      );
+
+      expect(result).toMatchObject({
+        verdict: 'not-measured',
+        reasonCode: 'owner-control-invalid',
+      });
+    },
+  );
+});
@@ -0,0 +1,280 @@
+import { z } from 'zod';
+import { parseCredentialEstateRegistry } from '../credentials/estate-registry.js';
+import type { MigrationOwnerResolution } from './brain-store.js';
+
+const MAX_BODY_BYTES = 256 * 1024;
+const LOGIN = /^[a-z0-9](?:[a-z0-9-]*[a-z0-9])?(?:\.[a-z0-9](?:[a-z0-9-]*[a-z0-9])?)*$/;
+const REQUESTED_OWNER = /^user:(.+)$/;
+
+const ownerPolicySchema = z
+  .object({
+    version: z.literal(1),
+    estates: z
+      .array(
+        z
+          .object({
+            estate: z.string().min(1),
+            laneArchiveOwners: z
+              .array(
+                z
+                  .object({
+                    kind: z.literal('provider-user'),
+                    login: z.string().min(1),
+                  })
+                  .strict(),
+              )
+              .min(1),
+            standingProcess: z
+              .object({
+                kind: z.literal('glpi-queue'),
+                queue: z.string().regex(/^[a-z0-9][a-z0-9-]*$/),
+              })
+              .strict(),
+            controls: z
+              .object({
+                publicIdentity: z.string().min(1),
+                privateIdentity: z.string().min(1),
+              })
+              .strict(),
+          })
+          .strict(),
+      )
+      .min(1),
+  })
+  .strict();
+
+const providerUserSchema = z
+  .object({
+    id: z.number().int(),
+    login: z.string().min(1),
+    visibility: z.literal('public'),
+  })
+  .passthrough();
+
+export type OwnerFetch = (input: string | URL | Request, init?: RequestInit) => Promise<Response>;
+
+function unresolved(reasonCode: string): MigrationOwnerResolution {
+  return {
+    verdict: 'not-measured',
+    reasonCode,
+    principal: null,
+    authority: null,
+  };
+}
+
+function refused(reasonCode: string): MigrationOwnerResolution {
+  return {
+    verdict: 'refused',
+    reasonCode,
+    principal: null,
+    authority: null,
+  };
+}
+
+function exactCanonicalLogin(value: string): boolean {
+  return value.normalize('NFKC') === value && LOGIN.test(value);
+}
+
+async function boundedJson(response: Response): Promise<unknown> {
+  const contentType = response.headers.get('content-type') ?? '';
+  if (!contentType.toLowerCase().startsWith('application/json')) {
+    throw new Error('owner-unexpected-content-type');
+  }
+  const declared = response.headers.get('content-length');
+  let declaredSize: number | null = null;
+  if (declared !== null) {
+    if (!/^\d+$/.test(declared)) throw new Error('owner-unexpected-provider-shape');
+    declaredSize = Number.parseInt(declared, 10);
+    if (!Number.isSafeInteger(declaredSize) || declaredSize > MAX_BODY_BYTES) {
+      throw new Error('owner-unexpected-provider-shape');
+    }
+  }
+  if (response.body === null) throw new Error('owner-unexpected-provider-shape');
+  const reader = response.body.getReader();
+  const chunks: Uint8Array[] = [];
+  let total = 0;
+  while (true) {
+    const next = await reader.read();
+    if (next.done) break;
+    total += next.value.byteLength;
+    if (total > MAX_BODY_BYTES) {
+      await reader.cancel('owner response exceeds byte ceiling');
+      throw new Error('owner-unexpected-provider-shape');
+    }
+    chunks.push(next.value);
+  }
+  if (declaredSize !== null && declaredSize !== total) {
+    throw new Error('owner-unexpected-provider-shape');
+  }
+  const body = new Uint8Array(total);
+  let offset = 0;
+  for (const chunk of chunks) {
+    body.set(chunk, offset);
+    offset += chunk.byteLength;
+  }
+  try {
+    return JSON.parse(new TextDecoder('utf-8', { fatal: true }).decode(body));
+  } catch {
+    throw new Error('owner-unexpected-provider-shape');
+  }
+}
+
+async function readPublicIdentity(
+  origin: string,
+  identity: string,
+  fetchImpl: OwnerFetch,
+): Promise<{ readonly status: number; readonly user: unknown }> {
+  let response: Response;
+  try {
+    response = await fetchImpl(`${origin}/api/v1/users/${encodeURIComponent(identity)}`, {
+      method: 'GET',
+      headers: {
+        Accept: 'application/json',
+        'User-Agent': 'mosaic-brain-owner/1',
+      },
+      redirect: 'manual',
+      signal: AbortSignal.timeout(5_000),
+    });
+  } catch {
+    throw new Error('owner-provider-unavailable');
+  }
+  return { status: response.status, user: await boundedJson(response) };
+}
+
+function publicIdentityMatches(value: unknown, identity: string): boolean {
+  const parsed = providerUserSchema.safeParse(value);
+  return parsed.success && parsed.data.login === identity;
+}
+
+export interface BrainOwnerPolicyBinding {
+  readonly brainNamespace: string;
+  readonly publicControl: string;
+  readonly privateControl: string;
+  readonly standingQueue: string;
+}
+
+export function resolveBrainOwnerPolicy(
+  ownerPolicySource: string,
+  estate: string,
+): BrainOwnerPolicyBinding | undefined {
+  let rawPolicy: unknown;
+  try {
+    rawPolicy = JSON.parse(ownerPolicySource);
+  } catch {
+    return undefined;
+  }
+  const policy = ownerPolicySchema.safeParse(rawPolicy);
+  if (!policy.success) return undefined;
+  const estatePolicies = policy.data.estates.filter(
+    (candidate): boolean => candidate.estate === estate,
+  );
+  if (estatePolicies.length !== 1) return undefined;
+  const estatePolicy = estatePolicies[0];
+  if (estatePolicy === undefined || estatePolicy.laneArchiveOwners.length !== 1) return undefined;
+  const brainNamespace = estatePolicy.laneArchiveOwners[0]?.login;
+  if (brainNamespace === undefined || !exactCanonicalLogin(brainNamespace)) return undefined;
+  return {
+    brainNamespace,
+    publicControl: estatePolicy.controls.publicIdentity,
+    privateControl: estatePolicy.controls.privateIdentity,
+    standingQueue: estatePolicy.standingProcess.queue,
+  };
+}
+
+export function parseRequestedOwner(requestedOwner: string): string | null {
+  if (requestedOwner.normalize('NFKC') !== requestedOwner) return null;
+  const match = REQUESTED_OWNER.exec(requestedOwner);
+  const login = match?.[1];
+  if (login === undefined || !exactCanonicalLogin(login)) return null;
+  return login;
+}
+
+export async function resolveProviderDurableOwner(
+  input: {
+    readonly estateRegistrySource: string;
+    readonly ownerPolicySource: string;
+    readonly host: string;
+    readonly requestedOwner: string;
+  },
+  dependencies: {
+    readonly fetch: OwnerFetch;
+    readonly absentControlName: () => string;
+  },
+): Promise<MigrationOwnerResolution> {
+  const requestedLogin = parseRequestedOwner(input.requestedOwner);
+  if (requestedLogin === null) return refused('owner-name-invalid');
+
+  const target = parseCredentialEstateRegistry(input.estateRegistrySource).resolveByHost(
+    input.host,
+  );
+  if (target === undefined) return refused('estate-host-unmapped');
+
+  const policy = resolveBrainOwnerPolicy(input.ownerPolicySource, target.estate);
+  if (policy === undefined) return refused('owner-policy-invalid');
+  if (policy.brainNamespace !== requestedLogin) return refused('owner-not-allowlisted');
+
+  const publicControl = policy.publicControl;
+  const privateControl = policy.privateControl;
+  const absentControl = dependencies.absentControlName();
+  if (
+    !exactCanonicalLogin(publicControl) ||
+    !exactCanonicalLogin(privateControl) ||
+    !exactCanonicalLogin(absentControl) ||
+    new Set([publicControl, privateControl, absentControl, requestedLogin]).size !== 4
+  ) {
+    return refused('owner-policy-invalid');
+  }
+
+  try {
+    const publicResult = await readPublicIdentity(
+      target.host.apiBaseUrl,
+      publicControl,
+      dependencies.fetch,
+    );
+    if (publicResult.status !== 200 || !publicIdentityMatches(publicResult.user, publicControl)) {
+      return unresolved('owner-control-invalid');
+    }
+
+    const privateResult = await readPublicIdentity(
+      target.host.apiBaseUrl,
+      privateControl,
+      dependencies.fetch,
+    );
+    if (privateResult.status !== 404) return unresolved('owner-control-invalid');
+
+    const absentResult = await readPublicIdentity(
+      target.host.apiBaseUrl,
+      absentControl,
+      dependencies.fetch,
+    );
+    if (absentResult.status !== 404) return unresolved('owner-control-invalid');
+
+    const ownerResult = await readPublicIdentity(
+      target.host.apiBaseUrl,
+      requestedLogin,
+      dependencies.fetch,
+    );
+    if (ownerResult.status === 401 || ownerResult.status === 403 || ownerResult.status === 404) {
+      return unresolved('owner-not-resolvable');
+    }
+    if (ownerResult.status !== 200) return unresolved('owner-provider-unavailable');
+    if (!publicIdentityMatches(ownerResult.user, requestedLogin)) {
+      return unresolved('owner-provider-identity-mismatch');
+    }
+    return {
+      verdict: 'resolved',
+      reasonCode: 'owner-verified',
+      principal: { name: `user:${requestedLogin}`, kind: 'durable-human' },
+      authority: {
+        system: 'gitea',
+        endpoint: `GET /api/v1/users/${requestedLogin}`,
+        contentType: 'application/json',
+      },
+    };
+  } catch (error: unknown) {
+    const reason = error instanceof Error ? error.message : 'owner-provider-unavailable';
+    if (reason === 'owner-unexpected-content-type') return unresolved(reason);
+    if (reason === 'owner-unexpected-provider-shape') return unresolved(reason);
+    return unresolved('owner-provider-unavailable');
+  }
+}
@@ -0,0 +1,122 @@
+import { afterEach, describe, expect, it } from 'vitest';
+import { Command } from 'commander';
+import { mkdirSync, mkdtempSync, readFileSync, rmSync, writeFileSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+
+interface BrainProvisionCommandModule {
+  readonly BRAIN_PROVISION_COMMAND: string;
+  registerBrainProvisionCommand(program: Command): void;
+  executeBrainProvisionCommand(
+    options: {
+      readonly mosaicHome: string;
+      readonly home: string;
+      readonly identity: string;
+      readonly refusalIdentity: string;
+      readonly targetUrl: string;
+      readonly owner: string;
+      readonly lane: string;
+      readonly sourceRoot?: string;
+      readonly brainRoot?: string;
+      readonly ownerPolicy?: string;
+      readonly registry?: string;
+    },
+    dependencies: {
+      readonly run: () => never;
+      readonly fetch: typeof fetch;
+      readonly absentControlName: () => string;
+    },
+  ): Promise<{
+    readonly status: 'provisioned' | 'blocked' | 'failed';
+    readonly reasonCode: string;
+  }>;
+}
+
+const MODULE_PATH = './brain-provision-command.js';
+const roots: string[] = [];
+
+async function loadCommand(requirement: string): Promise<BrainProvisionCommandModule> {
+  try {
+    return (await import(MODULE_PATH)) as BrainProvisionCommandModule;
+  } catch (error: unknown) {
+    const detail = error instanceof Error ? error.message : String(error);
+    throw new Error(`${requirement}: brain provision command is absent (${detail})`);
+  }
+}
+
+function tempRoot(): string {
+  const root = mkdtempSync(join(tmpdir(), 'mosaic-brain-command-'));
+  roots.push(root);
+  return root;
+}
+
+afterEach((): void => {
+  for (const root of roots.splice(0)) rmSync(root, { recursive: true, force: true });
+});
+
+describe('internal P7 brain provision command', (): void => {
+  it('registers only explicit non-secret contract inputs and no credential/token lookup switches', async (): Promise<void> => {
+    const module = await loadCommand('MB-REQ-03 broker-only provision command');
+    const program = new Command();
+    module.registerBrainProvisionCommand(program);
+    const command = program.commands.find(
+      (candidate) => candidate.name() === module.BRAIN_PROVISION_COMMAND,
+    );
+
+    expect(command).toBeDefined();
+    const flags = command?.options.map((option) => option.flags) ?? [];
+    expect(flags.join(' ')).toContain('--identity');
+    expect(flags.join(' ')).toContain('--target-url');
+    expect(flags.join(' ')).toContain('--refusal-identity');
+    expect(flags.join(' ')).toContain('--owner-policy');
+    expect(flags.join(' ')).toContain('--owner');
+    expect(flags.join(' ')).toContain('--lane');
+    expect(flags.join(' ')).not.toMatch(/token|password|authorization|grant-authority/i);
+  });
+
+  it('is registered by the shipped CLI', async (): Promise<void> => {
+    const module = await loadCommand('MB-REQ-10 shipped P7 command');
+    const cli = readFileSync(join(process.cwd(), 'src', 'cli.ts'), 'utf8');
+
+    expect(cli).toContain('registerBrainProvisionCommand');
+    expect(cli).toContain(`registerBrainProvisionCommand(program)`);
+    expect(module.BRAIN_PROVISION_COMMAND).toBe('__brain-provision');
+  });
+
+  it('fails closed before commands when the local owner policy is absent', async (): Promise<void> => {
+    const module = await loadCommand('MB-REQ-09 owner policy required');
+    const root = tempRoot();
+    const home = join(root, 'home');
+    const mosaicHome = join(home, '.config', 'mosaic');
+    mkdirSync(join(mosaicHome, 'cred'), { recursive: true });
+    writeFileSync(
+      join(mosaicHome, 'cred', 'estates.json'),
+      JSON.stringify({ version: 1, estates: [] }),
+      { mode: 0o600 },
+    );
+    let commands = 0;
+
+    const result = await module.executeBrainProvisionCommand(
+      {
+        mosaicHome,
+        home,
+        identity: 'seat-a',
+        refusalIdentity: 'outside-seat',
+        targetUrl: 'https://git.example.invalid/example/stack.git',
+        owner: 'user:durable-owner',
+        lane: 'lane-a',
+      },
+      {
+        run: (): never => {
+          commands += 1;
+          throw new Error('must not run');
+        },
+        fetch,
+        absentControlName: (): string => 'generated-absent-control',
+      },
+    );
+
+    expect(result).toMatchObject({ status: 'failed', reasonCode: 'owner-policy-unavailable' });
+    expect(commands).toBe(0);
+  });
+});
@@ -0,0 +1,133 @@
+import { randomUUID } from 'node:crypto';
+import { homedir } from 'node:os';
+import { join } from 'node:path';
+import type { Command } from 'commander';
+import { readBrainConfigSecure } from './brain-secure-config.js';
+import { provisionBrain, type ProvisionResult } from './brain-provision.js';
+import { systemCommandRunner, type CommandRunner } from './brain-store-runtime.js';
+import type { OwnerFetch } from './brain-owner-resolver.js';
+
+export const BRAIN_PROVISION_COMMAND = '__brain-provision';
+
+interface BrainProvisionCommandOptions {
+  readonly mosaicHome: string;
+  readonly home: string;
+  readonly identity: string;
+  readonly refusalIdentity: string;
+  readonly targetUrl: string;
+  readonly owner: string;
+  readonly lane: string;
+  readonly sourceRoot?: string;
+  readonly brainRoot?: string;
+  readonly ownerPolicy?: string;
+  readonly registry?: string;
+}
+
+interface BrainProvisionCommandDependencies {
+  readonly run: CommandRunner;
+  readonly fetch: OwnerFetch;
+  readonly absentControlName: () => string;
+}
+
+function configFailure(reasonCode: string): ProvisionResult {
+  return {
+    status: 'failed',
+    reasonCode,
+    findings: [{ code: `brain-${reasonCode}`, reasonCode }],
+    owner: null,
+    migration: null,
+  };
+}
+
+export async function executeBrainProvisionCommand(
+  options: BrainProvisionCommandOptions,
+  dependencies: BrainProvisionCommandDependencies,
+): Promise<ProvisionResult> {
+  const registry = options.registry ?? join(options.mosaicHome, 'cred', 'estates.json');
+  const ownerPolicy = options.ownerPolicy ?? join(options.mosaicHome, 'brain', 'owners.json');
+  let estateRegistrySource: string;
+  try {
+    estateRegistrySource = readBrainConfigSecure(registry, options.mosaicHome);
+  } catch {
+    return configFailure('estate-registry-unavailable');
+  }
+  let ownerPolicySource: string;
+  try {
+    ownerPolicySource = readBrainConfigSecure(ownerPolicy, options.mosaicHome);
+  } catch {
+    return configFailure('owner-policy-unavailable');
+  }
+
+  try {
+    return await provisionBrain(
+      {
+        estateRegistrySource,
+        ownerPolicySource,
+        targetGitUrl: options.targetUrl,
+        requestedOwner: options.owner,
+        identity: options.identity,
+        refusalIdentity: options.refusalIdentity,
+        root: options.brainRoot ?? join(options.home, '.mosaic'),
+        sourceRoot: options.sourceRoot ?? join(options.mosaicHome, 'memory'),
+        seat: options.identity,
+        lane: options.lane,
+        laneActive: false,
+      },
+      dependencies,
+    );
+  } catch {
+    return configFailure('brain-provision-exception');
+  }
+}
+
+export function registerBrainProvisionCommand(program: Command): void {
+  program
+    .command(BRAIN_PROVISION_COMMAND, { hidden: true })
+    .description('Internal installer P7 durable-brain provisioner')
+    .requiredOption('--identity <name>', 'explicit fleet identity')
+    .requiredOption('--target-url <url>', 'configured target git URL')
+    .requiredOption('--refusal-identity <name>', 'explicit out-of-estate negative control')
+    .requiredOption('--owner <owner>', 'policy-bound durable owner candidate')
+    .requiredOption('--lane <name>', 'source lane to migrate')
+    .option('--mosaic-home <path>', 'installed Mosaic home')
+    .option('--home <path>', 'principal home')
+    .option('--source-root <path>', 'legacy memory root')
+    .option('--brain-root <path>', 'per-estate brain checkout root')
+    .option('--owner-policy <path>', 'durable-owner allowlist policy')
+    .option('--registry <path>', 'estate registry path')
+    .action(async (raw: Record<string, string | undefined>): Promise<void> => {
+      const home = raw['home'] ?? homedir();
+      const mosaicHome =
+        raw['mosaicHome'] ?? process.env['MOSAIC_HOME'] ?? join(home, '.config', 'mosaic');
+      const result = await executeBrainProvisionCommand(
+        {
+          mosaicHome,
+          home,
+          identity: raw['identity']!,
+          targetUrl: raw['targetUrl']!,
+          refusalIdentity: raw['refusalIdentity']!,
+          owner: raw['owner']!,
+          lane: raw['lane']!,
+          ...(raw['sourceRoot'] === undefined ? {} : { sourceRoot: raw['sourceRoot'] }),
+          ...(raw['brainRoot'] === undefined ? {} : { brainRoot: raw['brainRoot'] }),
+          ...(raw['ownerPolicy'] === undefined ? {} : { ownerPolicy: raw['ownerPolicy'] }),
+          ...(raw['registry'] === undefined ? {} : { registry: raw['registry'] }),
+        },
+        {
+          run: systemCommandRunner,
+          fetch,
+          absentControlName: (): string => `mosaic-absent-${randomUUID()}`,
+        },
+      );
+      process.stdout.write(
+        `${JSON.stringify({
+          status: result.status,
+          reasonCode: result.reasonCode,
+          findings: result.findings,
+          owner: result.owner,
+          migration: result.migration,
+        })}\n`,
+      );
+      if (result.status !== 'provisioned') process.exitCode = result.status === 'blocked' ? 30 : 20;
+    });
+}
@@ -0,0 +1,561 @@
+import { afterEach, describe, expect, it } from 'vitest';
+import {
+  existsSync,
+  lstatSync,
+  mkdirSync,
+  mkdtempSync,
+  readFileSync,
+  rmSync,
+  writeFileSync,
+} from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+
+interface CommandRequest {
+  readonly program: 'git' | 'mosaic';
+  readonly args: readonly string[];
+  readonly env: Readonly<Record<string, string>>;
+}
+
+interface CommandResult {
+  readonly status: number;
+  readonly stdout: string;
+  readonly stderr: string;
+}
+
+type CommandRunner = (request: CommandRequest) => CommandResult;
+type FetchLike = (input: string | URL | Request, init?: RequestInit) => Promise<Response>;
+
+interface ProvisionResult {
+  readonly status: 'provisioned' | 'blocked' | 'failed';
+  readonly reasonCode: string;
+  readonly findings: readonly { code: string; reasonCode: string | null }[];
+  readonly owner: {
+    readonly verdict: 'resolved' | 'refused' | 'not-measured';
+    readonly reasonCode: string;
+  } | null;
+  readonly migration: {
+    readonly status: 'migrated' | 'reported' | 'failed';
+    readonly reported: readonly { path: string; reason: string }[];
+  } | null;
+}
+
+interface ProvisionModule {
+  provisionBrain(
+    input: {
+      readonly estateRegistrySource: string;
+      readonly ownerPolicySource: string;
+      readonly targetGitUrl: string;
+      readonly requestedOwner: string;
+      readonly identity: string;
+      readonly refusalIdentity: string;
+      readonly root: string;
+      readonly sourceRoot: string;
+      readonly seat: string;
+      readonly lane: string;
+      readonly laneActive: boolean;
+    },
+    dependencies: {
+      readonly run: CommandRunner;
+      readonly fetch: FetchLike;
+      readonly absentControlName: () => string;
+      readonly approveMigrationContent?: (path: string, content: Uint8Array) => boolean;
+    },
+  ): Promise<ProvisionResult>;
+}
+
+const MODULE_PATH = './brain-provision.js';
+const roots: string[] = [];
+
+async function loadProvisioner(requirement: string): Promise<ProvisionModule> {
+  try {
+    return (await import(MODULE_PATH)) as ProvisionModule;
+  } catch (error: unknown) {
+    const detail = error instanceof Error ? error.message : String(error);
+    throw new Error(`${requirement}: brain provisioner is absent (${detail})`);
+  }
+}
+
+function tempRoot(): string {
+  const root = mkdtempSync(join(tmpdir(), 'mosaic-brain-provision-'));
+  roots.push(root);
+  return root;
+}
+
+function estateRegistry(): string {
+  return JSON.stringify({
+    version: 1,
+    estates: [
+      {
+        name: 'homelab',
+        readOnlyControlIdentity: 'read-control',
+        hosts: [
+          {
+            host: 'git.example.invalid',
+            provider: 'gitea',
+            apiBaseUrl: 'https://git.example.invalid',
+            tokenPrefix: 'gitea-example',
+          },
+        ],
+      },
+    ],
+  });
+}
+
+function ownerPolicy(): string {
+  return JSON.stringify({
+    version: 1,
+    estates: [
+      {
+        estate: 'homelab',
+        laneArchiveOwners: [{ kind: 'provider-user', login: 'durable-owner' }],
+        standingProcess: { kind: 'glpi-queue', queue: 'mosaic-brain-remediation' },
+        controls: { publicIdentity: 'public-control', privateIdentity: 'private-control' },
+      },
+    ],
+  });
+}
+
+function validateResult(
+  outcome: 'ok' | 'refused' | 'indeterminate',
+  reasonCode: string,
+  identity = 'seat-a',
+): string {
+  const exitCode = outcome === 'ok' ? 0 : outcome === 'refused' ? 10 : 30;
+  return JSON.stringify({
+    schemaVersion: 1,
+    operation: 'validate',
+    outcome,
+    exitCode,
+    retryable: false,
+    subject: {
+      identity,
+      estate: 'homelab',
+      host: 'git.example.invalid',
+      repo: 'durable-owner/mosaic-brain',
+    },
+    mutation: 'none',
+    reason: { code: reasonCode, message: 'non-secret' },
+    evidence: {
+      providerIdentity:
+        outcome === 'ok'
+          ? {
+              login: identity,
+              endpoint: 'GET /api/v1/user',
+              contentType: 'application/json',
+            }
+          : null,
+      repositoryPermission:
+        outcome === 'ok'
+          ? {
+              requested: 'write',
+              effective: 'write',
+              endpoint: 'GET /api/v1/repos/durable-owner/mosaic-brain',
+              contentType: 'application/json',
+            }
+          : null,
+      writeDifferential:
+        outcome === 'ok'
+          ? {
+              state: 'can-write',
+              credentialBinding: 'same-resolution',
+              transportPrincipal: identity,
+              authenticatedReceivePack: 'advertised',
+              readOnlyControl: {
+                identity: 'read-control',
+                providerPermission: 'read',
+                receivePack: 'refused',
+              },
+              unauthenticatedReceivePack: 'refused',
+              artifactCreated: false,
+              proves: 'non-secret evidence',
+              doesNotProve: 'branch update acceptance',
+            }
+          : null,
+    },
+    audit: { journalId: 'opaque', state: 'sealed' },
+  });
+}
+
+function publicUser(login: string): Response {
+  return new Response(JSON.stringify({ id: 1, login, visibility: 'public', active: false }), {
+    status: 200,
+    headers: { 'content-type': 'application/json' },
+  });
+}
+
+function ownerFetch(ownerStatus = 200): FetchLike {
+  return async (input): Promise<Response> => {
+    const raw = typeof input === 'string' ? input : input instanceof URL ? input.href : input.url;
+    const identity = decodeURIComponent(new URL(raw).pathname.split('/').at(-1) ?? '');
+    if (identity === 'public-control') return publicUser(identity);
+    if (identity === 'private-control' || identity === 'generated-absent-control') {
+      return new Response(JSON.stringify({ message: 'hidden or absent' }), {
+        status: 404,
+        headers: { 'content-type': 'application/json' },
+      });
+    }
+    if (identity === 'durable-owner' && ownerStatus === 200) return publicUser(identity);
+    return new Response(JSON.stringify({ message: 'hidden or absent' }), {
+      status: ownerStatus,
+      headers: { 'content-type': 'application/json' },
+    });
+  };
+}
+
+function baseInput(root: string): {
+  readonly estateRegistrySource: string;
+  readonly ownerPolicySource: string;
+  readonly targetGitUrl: string;
+  readonly requestedOwner: string;
+  readonly identity: string;
+  readonly refusalIdentity: string;
+  readonly root: string;
+  readonly sourceRoot: string;
+  readonly seat: string;
+  readonly lane: string;
+  readonly laneActive: boolean;
+} {
+  return {
+    estateRegistrySource: estateRegistry(),
+    ownerPolicySource: ownerPolicy(),
+    targetGitUrl: 'https://git.example.invalid/example/stack.git',
+    requestedOwner: 'user:durable-owner',
+    identity: 'seat-a',
+    refusalIdentity: 'outside-seat',
+    root: join(root, 'brain'),
+    sourceRoot: join(root, 'local-memory'),
+    seat: 'seat-a',
+    lane: 'lane-a',
+    laneActive: false,
+  };
+}
+
+afterEach((): void => {
+  for (const root of roots.splice(0)) rmSync(root, { recursive: true, force: true });
+});
+
+describe('P7 brain provisioning orchestration', (): void => {
+  it('requires the P5 write-capability postcondition and never grants or clones on refusal', async (): Promise<void> => {
+    const provisioner = await loadProvisioner('MB-REQ-10 P5 before P7');
+    const root = tempRoot();
+    const requests: CommandRequest[] = [];
+
+    const result = await provisioner.provisionBrain(baseInput(root), {
+      run: (request): CommandResult => {
+        requests.push(request);
+        return {
+          status: 10,
+          stdout: validateResult('refused', 'no-token-for-identity'),
+          stderr: 'refused reason=no-token-for-identity',
+        };
+      },
+      fetch: ownerFetch(),
+      absentControlName: (): string => 'generated-absent-control',
+    });
+
+    expect(result).toMatchObject({
+      status: 'blocked',
+      reasonCode: 'credential-postcondition-failed',
+    });
+    expect(requests).toHaveLength(1);
+    expect(requests[0]?.program).toBe('mosaic');
+    expect(requests[0]?.args.slice(0, 3)).toEqual(['cred', 'validate', 'seat-a']);
+    expect(requests.some((request) => request.args.includes('grant'))).toBe(false);
+    expect(requests.some((request) => request.args.includes('clone'))).toBe(false);
+  });
+
+  it('blocks before clone when the out-of-estate Git and API axes disagree', async (): Promise<void> => {
+    const provisioner = await loadProvisioner('MB-REQ-05 P7 refusal control gate');
+    const root = tempRoot();
+    const requests: CommandRequest[] = [];
+
+    const result = await provisioner.provisionBrain(baseInput(root), {
+      run: (request): CommandResult => {
+        requests.push(request);
+        if (request.program === 'mosaic' && request.args[2] === 'outside-seat') {
+          return {
+            status: 10,
+            stdout: validateResult('refused', 'no-token-for-identity', 'outside-seat'),
+            stderr: 'refused reason=no-token-for-identity',
+          };
+        }
+        if (request.program === 'mosaic') {
+          return { status: 0, stdout: validateResult('ok', 'validation-verified'), stderr: '' };
+        }
+        if (request.args.includes('ls-remote')) {
+          return { status: 0, stdout: 'refs are visible', stderr: '' };
+        }
+        return { status: 99, stdout: '', stderr: 'unexpected command' };
+      },
+      fetch: ownerFetch(),
+      absentControlName: (): string => 'generated-absent-control',
+    });
+
+    expect(result).toMatchObject({
+      status: 'blocked',
+      reasonCode: 'refusal-control-failed',
+    });
+    expect(requests.some((request) => request.args.includes('clone'))).toBe(false);
+    expect(requests.some((request) => request.args.includes('grant'))).toBe(false);
+  });
+
+  it('blocks before skeleton publication when the existing checkout is dirty', async (): Promise<void> => {
+    const provisioner = await loadProvisioner('MB-REQ-06 dirty checkout publication gate');
+    const root = tempRoot();
+    const input = baseInput(root);
+    mkdirSync(join(input.root, '.git'), { recursive: true });
+    const requests: CommandRequest[] = [];
+
+    const result = await provisioner.provisionBrain(input, {
+      run: (request): CommandResult => {
+        requests.push(request);
+        if (request.program === 'mosaic') {
+          return request.args[2] === 'outside-seat'
+            ? {
+                status: 10,
+                stdout: validateResult('refused', 'no-token-for-identity', 'outside-seat'),
+                stderr: 'refused reason=no-token-for-identity',
+              }
+            : { status: 0, stdout: validateResult('ok', 'validation-verified'), stderr: '' };
+        }
+        const command = request.args.join(' ');
+        if (command.includes('ls-remote')) {
+          return {
+            status: 128,
+            stdout: '',
+            stderr: 'credential helper refused reason=no-token-for-identity',
+          };
+        }
+        if (command.includes('rev-parse --is-inside-work-tree')) {
+          return { status: 0, stdout: 'true\n', stderr: '' };
+        }
+        if (command.includes('remote get-url origin')) {
+          return {
+            status: 0,
+            stdout: 'https://git.example.invalid/durable-owner/mosaic-brain.git\n',
+            stderr: '',
+          };
+        }
+        if (command.includes('branch --show-current')) {
+          return { status: 0, stdout: 'main\n', stderr: '' };
+        }
+        if (command.includes('status --porcelain')) {
+          return { status: 0, stdout: '?? .gitignore\n', stderr: '' };
+        }
+        return { status: 99, stdout: '', stderr: 'unexpected publication command' };
+      },
+      fetch: ownerFetch(),
+      absentControlName: (): string => 'generated-absent-control',
+    });
+
+    expect(result).toMatchObject({
+      status: 'blocked',
+      reasonCode: 'brain-postcondition-failed',
+    });
+    expect(requests.some((request) => request.args.includes('commit'))).toBe(false);
+    expect(requests.some((request) => request.args.includes('push'))).toBe(false);
+  });
+
+  it('clones, seeds, resolves owner, migrates, pushes on each write, and archives source only after reachability', async (): Promise<void> => {
+    const provisioner = await loadProvisioner('MB-REQ-07 complete migration transaction');
+    const root = tempRoot();
+    const input = baseInput(root);
+    mkdirSync(join(input.sourceRoot, 'lanes', 'lane-a'), { recursive: true });
+    const source = join(input.sourceRoot, 'lanes', 'lane-a', 'finding.md');
+    writeFileSync(source, 'durable finding\n');
+    const requests: CommandRequest[] = [];
+    let commitOrdinal = 0;
+    let approvedPaths: string[] = [];
+    let privateAtClone = false;
+    const runner: CommandRunner = (request): CommandResult => {
+      requests.push(request);
+      if (request.program === 'mosaic') {
+        if (request.args[2] === 'outside-seat') {
+          return {
+            status: 10,
+            stdout: validateResult('refused', 'no-token-for-identity', 'outside-seat'),
+            stderr: 'refused reason=no-token-for-identity',
+          };
+        }
+        return { status: 0, stdout: validateResult('ok', 'validation-verified'), stderr: '' };
+      }
+      const command = request.args.join(' ');
+      if (command.includes('ls-remote')) {
+        return {
+          status: 128,
+          stdout: '',
+          stderr: 'credential helper refused reason=no-token-for-identity',
+        };
+      }
+      if (request.args[0] === 'clone') {
+        privateAtClone = existsSync(input.root) && (lstatSync(input.root).mode & 0o077) === 0;
+        mkdirSync(join(input.root, '.git'), { recursive: true });
+        return { status: 0, stdout: '', stderr: '' };
+      }
+      if (command.includes('read-tree')) {
+        approvedPaths = [];
+        return { status: 0, stdout: '', stderr: '' };
+      }
+      if (command.includes('hash-object')) {
+        return { status: 0, stdout: `${'f'.repeat(40)}\n`, stderr: '' };
+      }
+      if (command.includes('update-index')) {
+        const path = request.args.at(-1);
+        if (path !== undefined) approvedPaths.push(path);
+        return { status: 0, stdout: '', stderr: '' };
+      }
+      if (command.includes('rev-parse') && request.args.at(-1)?.includes(':')) {
+        return { status: 0, stdout: `${'f'.repeat(40)}\n`, stderr: '' };
+      }
+      if (command.includes('diff --cached --quiet')) {
+        return { status: 1, stdout: '', stderr: '' };
+      }
+      if (command.includes('diff-tree')) {
+        return { status: 0, stdout: `${approvedPaths.join('\0')}\0`, stderr: '' };
+      }
+      if (command.includes('show -s')) {
+        return {
+          status: 0,
+          stdout: 'seat-a\[email protected]\0seat-a\[email protected]\n',
+          stderr: '',
+        };
+      }
+      if (command.includes('rev-parse --is-inside-work-tree')) {
+        return { status: 0, stdout: 'true\n', stderr: '' };
+      }
+      if (command.includes('remote get-url origin')) {
+        return {
+          status: 0,
+          stdout: 'https://git.example.invalid/durable-owner/mosaic-brain.git\n',
+          stderr: '',
+        };
+      }
+      if (command.includes('branch --show-current')) {
+        return { status: 0, stdout: 'main\n', stderr: '' };
+      }
+      if (command.includes('status --porcelain')) {
+        return { status: 0, stdout: '', stderr: '' };
+      }
+      if (command.includes('rev-parse HEAD')) {
+        commitOrdinal += 1;
+        return {
+          status: 0,
+          stdout: `${commitOrdinal === 1 ? 'a' : 'c'.repeat(1)}`.repeat(40) + '\n',
+          stderr: '',
+        };
+      }
+      if (command.includes('rev-parse origin/main')) {
+        const value = commitOrdinal === 1 ? 'b' : 'd';
+        return { status: 0, stdout: `${value.repeat(40)}\n`, stderr: '' };
+      }
+      return { status: 0, stdout: '', stderr: '' };
+    };
+
+    const result = await provisioner.provisionBrain(input, {
+      run: runner,
+      fetch: ownerFetch(),
+      absentControlName: (): string => 'generated-absent-control',
+      approveMigrationContent: (): boolean => true,
+    });
+
+    expect(result).toMatchObject({
+      status: 'provisioned',
+      reasonCode: 'brain-provisioned',
+      owner: { verdict: 'resolved', reasonCode: 'owner-verified' },
+      migration: { status: 'reported' },
+    });
+    expect(privateAtClone).toBe(true);
+    expect(existsSync(source)).toBe(true);
+    const imported = result.migration?.reported ?? [];
+    expect(imported).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({ path: source, reason: expect.stringMatching(/retained/i) }),
+      ]),
+    );
+    const laneImports = join(input.root, 'lanes', 'lane-a', 'findings', 'imports');
+    const archiveImports = join(input.root, 'archives', 'imports', 'lane');
+    expect(existsSync(laneImports)).toBe(true);
+    expect(existsSync(archiveImports)).toBe(true);
+    expect(
+      requests.filter((request) => request.program === 'git' && request.args.includes('push')),
+    ).toHaveLength(2);
+    expect(requests.some((request) => request.args.includes('grant'))).toBe(false);
+  });
+
+  it('keeps every source and reports the owner ambiguity when the public owner cannot be resolved', async (): Promise<void> => {
+    const provisioner = await loadProvisioner('MB-REQ-07 owner-blocked detection/reporting');
+    const root = tempRoot();
+    const input = baseInput(root);
+    mkdirSync(input.root, { recursive: true });
+    mkdirSync(join(input.root, '.git'), { recursive: true });
+    mkdirSync(join(input.sourceRoot, 'lanes', 'lane-a'), { recursive: true });
+    const source = join(input.sourceRoot, 'lanes', 'lane-a', 'finding.md');
+    writeFileSync(source, 'retain me\n');
+    let commitOrdinal = 0;
+
+    const result = await provisioner.provisionBrain(input, {
+      run: (request): CommandResult => {
+        if (request.program === 'mosaic') {
+          if (request.args[2] === 'outside-seat') {
+            return {
+              status: 10,
+              stdout: validateResult('refused', 'no-token-for-identity', 'outside-seat'),
+              stderr: 'refused reason=no-token-for-identity',
+            };
+          }
+          return { status: 0, stdout: validateResult('ok', 'validation-verified'), stderr: '' };
+        }
+        const command = request.args.join(' ');
+        if (command.includes('ls-remote')) {
+          return {
+            status: 128,
+            stdout: '',
+            stderr: 'credential helper refused reason=no-token-for-identity',
+          };
+        }
+        if (command.includes('rev-parse --is-inside-work-tree')) {
+          return { status: 0, stdout: 'true\n', stderr: '' };
+        }
+        if (command.includes('remote get-url origin')) {
+          return {
+            status: 0,
+            stdout: 'https://git.example.invalid/durable-owner/mosaic-brain.git\n',
+            stderr: '',
+          };
+        }
+        if (command.includes('branch --show-current')) {
+          return { status: 0, stdout: 'main\n', stderr: '' };
+        }
+        if (command.includes('status --porcelain')) {
+          return { status: 0, stdout: '', stderr: '' };
+        }
+        if (command.includes('rev-parse HEAD')) {
+          commitOrdinal += 1;
+          return { status: 0, stdout: `${'a'.repeat(40)}\n`, stderr: '' };
+        }
+        if (command.includes('rev-parse origin/main')) {
+          return { status: 0, stdout: `${'b'.repeat(40)}\n`, stderr: '' };
+        }
+        return { status: 0, stdout: '', stderr: '' };
+      },
+      fetch: ownerFetch(404),
+      absentControlName: (): string => 'generated-absent-control',
+    });
+
+    expect(result).toMatchObject({
+      status: 'blocked',
+      reasonCode: 'owner-not-resolvable',
+      owner: { verdict: 'not-measured', reasonCode: 'owner-not-resolvable' },
+      migration: { status: 'reported' },
+    });
+    expect(readFileSync(source, 'utf8')).toBe('retain me\n');
+    expect(result.migration?.reported).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({ path: source, reason: expect.stringMatching(/owner/i) }),
+      ]),
+    );
+    expect(JSON.stringify(result)).not.toMatch(/owner-not-found|does-not-exist/);
+    expect(commitOrdinal).toBe(0);
+  });
+});
@@ -0,0 +1,271 @@
+import { existsSync } from 'node:fs';
+import { parseRequestedOwner, resolveProviderDurableOwner } from './brain-owner-resolver.js';
+import {
+  createBrainSkeleton,
+  deriveBrainTarget,
+  discoverBrainMigration,
+  ensureBrainRootPrivate,
+  migrateBrainState,
+  type MigrationResult,
+  type MigrationOwnerResolution,
+  type MigrationPublishEntry,
+} from './brain-store.js';
+import {
+  collectBrainDoctorReport,
+  collectBrainRefusalControl,
+  publishBrainPaths,
+  type CommandRequest,
+  type CommandResult,
+  type CommandRunner,
+} from './brain-store-runtime.js';
+import type { OwnerFetch } from './brain-owner-resolver.js';
+
+export interface ProvisionResult {
+  readonly status: 'provisioned' | 'blocked' | 'failed';
+  readonly reasonCode: string;
+  readonly findings: readonly {
+    readonly code: string;
+    readonly reasonCode: string | null;
+  }[];
+  readonly owner: Pick<MigrationOwnerResolution, 'verdict' | 'reasonCode'> | null;
+  readonly migration: Pick<MigrationResult, 'status' | 'reported'> | null;
+}
+
+function commandEnv(identity: string): Readonly<Record<string, string>> {
+  return { MOSAIC_GIT_IDENTITY: identity, GIT_TERMINAL_PROMPT: '0' };
+}
+
+function findingView(
+  findings: readonly { readonly code: string; readonly reasonCode: string | null }[],
+): readonly { readonly code: string; readonly reasonCode: string | null }[] {
+  return findings.map((finding): { readonly code: string; readonly reasonCode: string | null } => ({
+    code: finding.code,
+    reasonCode: finding.reasonCode,
+  }));
+}
+
+function blocked(
+  reasonCode: string,
+  findings: readonly { readonly code: string; readonly reasonCode: string | null }[],
+  owner: MigrationOwnerResolution | null = null,
+  migration: MigrationResult | null = null,
+): ProvisionResult {
+  return {
+    status: 'blocked',
+    reasonCode,
+    findings: findingView(findings),
+    owner: owner === null ? null : { verdict: owner.verdict, reasonCode: owner.reasonCode },
+    migration:
+      migration === null ? null : { status: migration.status, reported: migration.reported },
+  };
+}
+
+function failed(
+  reasonCode: string,
+  findings: readonly { readonly code: string; readonly reasonCode: string | null }[],
+  owner: MigrationOwnerResolution | null = null,
+  migration: MigrationResult | null = null,
+): ProvisionResult {
+  return {
+    ...blocked(reasonCode, findings, owner, migration),
+    status: 'failed',
+  };
+}
+
+export async function provisionBrain(
+  input: {
+    readonly estateRegistrySource: string;
+    readonly ownerPolicySource: string;
+    readonly targetGitUrl: string;
+    readonly requestedOwner: string;
+    readonly identity: string;
+    readonly refusalIdentity: string;
+    readonly root: string;
+    readonly sourceRoot: string;
+    readonly seat: string;
+    readonly lane: string;
+    readonly laneActive: boolean;
+  },
+  dependencies: {
+    readonly run: CommandRunner;
+    readonly fetch: OwnerFetch;
+    readonly absentControlName: () => string;
+    readonly approveMigrationContent?: (path: string, content: Uint8Array) => boolean;
+  },
+): Promise<ProvisionResult> {
+  const brainNamespace = parseRequestedOwner(input.requestedOwner);
+  if (brainNamespace === null) return blocked('owner-name-invalid', []);
+  const target = deriveBrainTarget(input.estateRegistrySource, input.targetGitUrl, brainNamespace);
+  if (existsSync(input.root)) {
+    try {
+      ensureBrainRootPrivate(input.root);
+    } catch {
+      return blocked('brain-root-permissions-unsafe', []);
+    }
+  }
+  const doctorInput = {
+    registrySource: input.estateRegistrySource,
+    targetGitUrl: input.targetGitUrl,
+    brainNamespace,
+    identity: input.identity,
+    root: input.root,
+  };
+  let report = collectBrainDoctorReport(doctorInput, dependencies.run);
+  if (report.access.outcome !== 'ok') {
+    return blocked('credential-postcondition-failed', report.findings);
+  }
+
+  const refusalControl = collectBrainRefusalControl(
+    {
+      registrySource: input.estateRegistrySource,
+      targetGitUrl: input.targetGitUrl,
+      brainNamespace,
+      refusalIdentity: input.refusalIdentity,
+    },
+    dependencies.run,
+  );
+  if (!refusalControl.observed) {
+    return blocked('refusal-control-failed', [
+      ...report.findings,
+      {
+        code: 'brain-refusal-control-indeterminate',
+        reasonCode: refusalControl.reasonCode,
+      },
+    ]);
+  }
+
+  const owner = await resolveProviderDurableOwner(
+    {
+      estateRegistrySource: input.estateRegistrySource,
+      ownerPolicySource: input.ownerPolicySource,
+      host: target.host,
+      requestedOwner: input.requestedOwner,
+    },
+    {
+      fetch: dependencies.fetch,
+      absentControlName: dependencies.absentControlName,
+    },
+  );
+  if (owner.verdict !== 'resolved') {
+    const plan = discoverBrainMigration(
+      {
+        sourceRoot: input.sourceRoot,
+        brainRoot: input.root,
+        seat: input.seat,
+        lane: input.lane,
+        laneActive: input.laneActive,
+      },
+      (): MigrationOwnerResolution => owner,
+    );
+    const migration = migrateBrainState(
+      plan,
+      (): never => {
+        throw new Error('blocked owner cannot publish');
+      },
+      input.root,
+    );
+    return blocked(owner.reasonCode, report.findings, owner, migration);
+  }
+
+  if (report.findings.some((finding): boolean => finding.code === 'brain-clone-missing')) {
+    try {
+      ensureBrainRootPrivate(input.root);
+    } catch {
+      return failed('brain-root-permissions-unsafe', report.findings);
+    }
+    const clone: CommandRequest = {
+      program: 'git',
+      args: ['clone', '--branch', 'main', '--single-branch', target.cloneUrl, input.root],
+      env: commandEnv(input.identity),
+    };
+    const cloneResult: CommandResult = dependencies.run(clone);
+    if (cloneResult.status !== 0) return failed('brain-clone-failed', report.findings);
+    try {
+      ensureBrainRootPrivate(input.root);
+    } catch {
+      return failed('brain-root-permissions-unsafe', report.findings);
+    }
+    report = collectBrainDoctorReport(doctorInput, dependencies.run);
+  }
+
+  const blockingCloneFindings = report.findings.filter(
+    (finding): boolean =>
+      finding.code === 'brain-clone-missing' ||
+      finding.code === 'brain-not-git-repository' ||
+      finding.code === 'brain-remote-mismatch' ||
+      finding.code === 'brain-branch-mismatch' ||
+      finding.code === 'brain-uncommitted-state' ||
+      finding.code === 'brain-git-state-indeterminate' ||
+      finding.code === 'brain-root-permissions-unsafe' ||
+      finding.code.startsWith('brain-write-access-'),
+  );
+  if (blockingCloneFindings.length > 0) {
+    return blocked('brain-postcondition-failed', report.findings);
+  }
+
+  let skeletonEntries: readonly MigrationPublishEntry[];
+  try {
+    const skeleton = createBrainSkeleton(input.root);
+    skeletonEntries = skeleton.publicationEntries;
+  } catch {
+    return failed('brain-skeleton-failed', report.findings);
+  }
+  if (skeletonEntries.length > 0) {
+    try {
+      const evidence = publishBrainPaths(
+        {
+          root: input.root,
+          identity: input.identity,
+          entries: skeletonEntries,
+          message: 'chore: seed durable brain layout',
+        },
+        dependencies.run,
+      );
+      if (!evidence.reachable) return failed('brain-skeleton-not-reachable', report.findings);
+    } catch {
+      return failed('brain-skeleton-publish-failed', report.findings);
+    }
+  }
+
+  const plan = discoverBrainMigration(
+    {
+      sourceRoot: input.sourceRoot,
+      brainRoot: input.root,
+      seat: input.seat,
+      lane: input.lane,
+      laneActive: input.laneActive,
+    },
+    (): MigrationOwnerResolution => owner,
+    dependencies.approveMigrationContent,
+  );
+  const migration = migrateBrainState(
+    plan,
+    (brainRoot: string, entries: readonly MigrationPublishEntry[]) =>
+      publishBrainPaths(
+        {
+          root: brainRoot,
+          identity: input.identity,
+          entries,
+          message: `migrate: archive ${input.lane} working memory`,
+        },
+        dependencies.run,
+      ),
+    input.root,
+  );
+
+  if (migration.status === 'failed') {
+    return failed('brain-migration-publish-failed', report.findings, owner, migration);
+  }
+
+  report = collectBrainDoctorReport(doctorInput, dependencies.run);
+  if (report.findings.length > 0) {
+    return blocked('brain-final-postcondition-failed', report.findings, owner, migration);
+  }
+  return {
+    status: 'provisioned',
+    reasonCode: 'brain-provisioned',
+    findings: [],
+    owner: { verdict: owner.verdict, reasonCode: owner.reasonCode },
+    migration: { status: migration.status, reported: migration.reported },
+  };
+}
@@ -0,0 +1,77 @@
+import { afterEach, describe, expect, it, vi } from 'vitest';
+import { chmodSync, mkdirSync, mkdtempSync, rmSync, writeFileSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+
+interface SecureConfigModule {
+  readBrainConfigSecure(path: string, root: string): string;
+}
+
+const roots: string[] = [];
+
+async function loadSecureConfig(): Promise<SecureConfigModule> {
+  try {
+    return (await import('./brain-secure-config.js')) as SecureConfigModule;
+  } catch (error: unknown) {
+    const detail = error instanceof Error ? error.message : String(error);
+    throw new Error(`MB-REQ-06 secure brain config reader is absent (${detail})`);
+  }
+}
+
+function fixture(): { readonly root: string; readonly directory: string; readonly file: string } {
+  const outer = mkdtempSync(join(tmpdir(), 'mosaic-brain-secure-config-'));
+  roots.push(outer);
+  const root = join(outer, 'mosaic');
+  const directory = join(root, 'brain');
+  const file = join(directory, 'owners.json');
+  mkdirSync(directory, { recursive: true, mode: 0o700 });
+  writeFileSync(file, '{"version":1}\n', { mode: 0o600 });
+  return { root, directory, file };
+}
+
+afterEach((): void => {
+  vi.restoreAllMocks();
+  for (const root of roots.splice(0)) rmSync(root, { recursive: true, force: true });
+});
+
+describe('security-critical brain configuration reads', (): void => {
+  it('reads a principal-owned non-writable regular file through the secure descriptor path', async (): Promise<void> => {
+    const secure = await loadSecureConfig();
+    const config = fixture();
+
+    expect(secure.readBrainConfigSecure(config.file, config.root)).toBe('{"version":1}\n');
+  });
+
+  it('rejects a managed root owned by a UID other than the running principal', async (): Promise<void> => {
+    const secure = await loadSecureConfig();
+    const config = fixture();
+    if (typeof process.getuid !== 'function') throw new Error('test requires POSIX getuid');
+    const processWithUid = process as typeof process & { getuid: () => number };
+    const actualUid = processWithUid.getuid();
+    vi.spyOn(processWithUid, 'getuid').mockReturnValue(actualUid + 1);
+
+    expect(() => secure.readBrainConfigSecure(config.file, config.root)).toThrow(
+      /config-ancestor-owner-unsafe/,
+    );
+  });
+
+  it('rejects a group/world-writable policy file', async (): Promise<void> => {
+    const secure = await loadSecureConfig();
+    const config = fixture();
+    chmodSync(config.file, 0o666);
+
+    expect(() => secure.readBrainConfigSecure(config.file, config.root)).toThrow(
+      /config-file-permissions-unsafe/,
+    );
+  });
+
+  it('rejects a group/world-writable managed ancestor', async (): Promise<void> => {
+    const secure = await loadSecureConfig();
+    const config = fixture();
+    chmodSync(config.directory, 0o777);
+
+    expect(() => secure.readBrainConfigSecure(config.file, config.root)).toThrow(
+      /config-ancestor-permissions-unsafe/,
+    );
+  });
+});
@@ -0,0 +1,52 @@
+import { lstatSync } from 'node:fs';
+import { dirname, relative, resolve, sep } from 'node:path';
+import { assertCanonicalContainment, readRegularFileSecure } from '../fleet/secure-file.js';
+
+const MAX_CONFIG_BYTES = 256 * 1024;
+const GROUP_OR_OTHER_WRITE = 0o022;
+
+function currentUid(): number {
+  if (typeof process.getuid !== 'function') {
+    throw new Error('config-owner-check-unsupported');
+  }
+  return process.getuid();
+}
+
+function assertOwnedNonWritableDirectory(path: string, uid: number): void {
+  const status = lstatSync(path);
+  if (!status.isDirectory() || status.isSymbolicLink() || status.uid !== uid) {
+    throw new Error('config-ancestor-owner-unsafe');
+  }
+  if ((status.mode & GROUP_OR_OTHER_WRITE) !== 0) {
+    throw new Error('config-ancestor-permissions-unsafe');
+  }
+}
+
+export function readBrainConfigSecure(path: string, root: string): string {
+  const canonicalRoot = resolve(root);
+  const canonicalPath = resolve(path);
+  assertCanonicalContainment(canonicalRoot, canonicalPath);
+  const uid = currentUid();
+  assertOwnedNonWritableDirectory(canonicalRoot, uid);
+  let cursor = canonicalRoot;
+  for (const component of relative(canonicalRoot, dirname(canonicalPath))
+    .split(sep)
+    .filter(Boolean)) {
+    cursor = resolve(cursor, component);
+    assertOwnedNonWritableDirectory(cursor, uid);
+  }
+
+  const snapshot = readRegularFileSecure(canonicalPath, {
+    root: canonicalRoot,
+    maxBytes: MAX_CONFIG_BYTES,
+  });
+  if (snapshot.uid !== uid) throw new Error('config-file-owner-unsafe');
+  if ((snapshot.mode & GROUP_OR_OTHER_WRITE) !== 0) {
+    throw new Error('config-file-permissions-unsafe');
+  }
+  try {
+    return new TextDecoder('utf-8', { fatal: true }).decode(snapshot.content);
+  } catch {
+    throw new Error('config-file-not-utf8');
+  }
+}
@@ -0,0 +1,569 @@
+import { existsSync, mkdtempSync, rmSync } from 'node:fs';
+import { spawnSync } from 'node:child_process';
+import { tmpdir } from 'node:os';
+import { isAbsolute, join, relative, resolve, sep } from 'node:path';
+import {
+  assessCredentialResult,
+  brainRootIsPrivate,
+  deriveBrainTarget,
+  ensureBrainRootPrivate,
+  evaluateBrainDoctor,
+  planBrainDoctorFix,
+  type BrainDoctorFinding,
+  type BrainDoctorObservation,
+  type CredentialAssessment,
+} from './brain-store.js';
+
+const COMMIT = /^[0-9a-f]{40}$/;
+const GIT_OBJECT = /^(?:[0-9a-f]{40}|[0-9a-f]{64})$/;
+const MAX_PUBLISH_ENTRY_BYTES = 1024 * 1024;
+
+export interface CommandRequest {
+  readonly program: 'git' | 'mosaic';
+  readonly args: readonly string[];
+  readonly cwd?: string;
+  readonly env: Readonly<Record<string, string>>;
+  readonly stdin?: Uint8Array;
+}
+
+export interface CommandResult {
+  readonly status: number;
+  readonly stdout: string;
+  readonly stderr: string;
+}
+
+export type CommandRunner = (request: CommandRequest) => CommandResult;
+
+export const systemCommandRunner: CommandRunner = (request: CommandRequest): CommandResult => {
+  const result = spawnSync(request.program, request.args, {
+    cwd: request.cwd,
+    env: { ...process.env, ...request.env },
+    encoding: 'utf8',
+    maxBuffer: 1024 * 1024,
+    input: request.stdin,
+  });
+  return {
+    status: result.status ?? 127,
+    stdout: result.stdout ?? '',
+    stderr: result.stderr ?? result.error?.message ?? '',
+  };
+};
+
+export interface DoctorRuntimeReport {
+  readonly findings: readonly BrainDoctorFinding[];
+  readonly access: CredentialAssessment;
+  readonly refusalControl: {
+    readonly observed: boolean;
+    readonly reasonCode: string | null;
+  };
+}
+
+export interface BrainRefusalControlResult {
+  readonly observed: boolean;
+  readonly reasonCode: string | null;
+  readonly gitReasonCode: string;
+  readonly apiReasonCode: string;
+}
+
+export interface PublishEvidence {
+  readonly commit: string;
+  readonly remoteHead: string;
+  readonly reachable: boolean;
+}
+
+function commandEnv(identity: string): Readonly<Record<string, string>> {
+  return {
+    MOSAIC_GIT_IDENTITY: identity,
+    GIT_TERMINAL_PROMPT: '0',
+  };
+}
+
+function integrationFailure(): CredentialAssessment {
+  return {
+    outcome: 'indeterminate',
+    exitCode: 30,
+    reasonCode: 'unexpected-provider-shape',
+    diagnostic: 'indeterminate: unexpected-provider-shape',
+  };
+}
+
+function runGit(run: CommandRunner, identity: string, args: readonly string[]): CommandResult {
+  return run({ program: 'git', args, env: commandEnv(identity) });
+}
+
+function runGitWithEnv(
+  run: CommandRunner,
+  identity: string,
+  args: readonly string[],
+  env: Readonly<Record<string, string>>,
+  stdin?: Uint8Array,
+): CommandResult {
+  return run({ program: 'git', args, env: { ...commandEnv(identity), ...env }, stdin });
+}
+
+export function collectBrainDoctorReport(
+  input: {
+    readonly registrySource: string;
+    readonly targetGitUrl: string;
+    readonly brainNamespace: string;
+    readonly identity: string;
+    readonly root: string;
+  },
+  run: CommandRunner,
+): DoctorRuntimeReport {
+  const target = deriveBrainTarget(input.registrySource, input.targetGitUrl, input.brainNamespace);
+  const validation = run({
+    program: 'mosaic',
+    args: [
+      'cred',
+      'validate',
+      input.identity,
+      '--estate',
+      target.estate,
+      '--host',
+      target.host,
+      '--repo',
+      target.repo,
+      '--require',
+      'write',
+      '--json',
+    ],
+    env: commandEnv(input.identity),
+  });
+  let access = assessCredentialResult(validation.stdout, {
+    identity: input.identity,
+    estate: target.estate,
+    host: target.host,
+    repo: target.repo,
+  });
+  if (validation.status !== access.exitCode) access = integrationFailure();
+
+  const rootExists = existsSync(input.root);
+  let gitRepository = false;
+  let remote: string | null = null;
+  let branch: string | null = null;
+  let worktreeState: BrainDoctorObservation['worktreeState'] = 'unmeasurable';
+  if (rootExists) {
+    const repository = runGit(run, input.identity, [
+      '-C',
+      input.root,
+      'rev-parse',
+      '--is-inside-work-tree',
+    ]);
+    gitRepository = repository.status === 0 && repository.stdout.trim() === 'true';
+    if (gitRepository) {
+      const remoteResult = runGit(run, input.identity, [
+        '-C',
+        input.root,
+        'remote',
+        'get-url',
+        'origin',
+      ]);
+      const branchResult = runGit(run, input.identity, [
+        '-C',
+        input.root,
+        'branch',
+        '--show-current',
+      ]);
+      const statusResult = runGit(run, input.identity, ['-C', input.root, 'status', '--porcelain']);
+      if (remoteResult.status === 0) remote = remoteResult.stdout.trim();
+      if (branchResult.status === 0) branch = branchResult.stdout.trim();
+      if (statusResult.status === 0) {
+        worktreeState = statusResult.stdout.trim().length > 0 ? 'dirty' : 'clean';
+      }
+    }
+  }
+
+  const observation: BrainDoctorObservation = {
+    rootExists,
+    rootPrivate: rootExists && brainRootIsPrivate(input.root),
+    gitRepository,
+    remote,
+    branch,
+    worktreeState,
+    access,
+  };
+  const refusalMarker = `refused reason=${access.reasonCode}`;
+  const refusalObserved =
+    validation.status === 10 &&
+    access.outcome === 'refused' &&
+    access.reasonCode === 'no-token-for-identity' &&
+    validation.stderr.includes(refusalMarker);
+  return {
+    findings: evaluateBrainDoctor(observation, target.cloneUrl),
+    access,
+    refusalControl: {
+      observed: refusalObserved,
+      reasonCode: refusalObserved ? access.reasonCode : null,
+    },
+  };
+}
+
+export function collectBrainRefusalControl(
+  input: {
+    readonly registrySource: string;
+    readonly targetGitUrl: string;
+    readonly brainNamespace: string;
+    readonly refusalIdentity: string;
+  },
+  run: CommandRunner,
+): BrainRefusalControlResult {
+  const target = deriveBrainTarget(input.registrySource, input.targetGitUrl, input.brainNamespace);
+  if (!/^[A-Za-z0-9][A-Za-z0-9_.-]*$/.test(input.refusalIdentity)) {
+    return {
+      observed: false,
+      reasonCode: 'permission-evidence-disagrees',
+      gitReasonCode: 'invalid-control-identity',
+      apiReasonCode: 'invalid-control-identity',
+    };
+  }
+  const apiResult = run({
+    program: 'mosaic',
+    args: [
+      'cred',
+      'validate',
+      input.refusalIdentity,
+      '--estate',
+      target.estate,
+      '--host',
+      target.host,
+      '--repo',
+      target.repo,
+      '--require',
+      'write',
+      '--json',
+    ],
+    env: commandEnv(input.refusalIdentity),
+  });
+  let api = assessCredentialResult(apiResult.stdout, {
+    identity: input.refusalIdentity,
+    estate: target.estate,
+    host: target.host,
+    repo: target.repo,
+  });
+  if (apiResult.status !== api.exitCode) api = integrationFailure();
+
+  const gitResult = runGit(run, input.refusalIdentity, ['ls-remote', target.cloneUrl, 'HEAD']);
+  const marker = /(?:^|\s)reason=([a-z0-9-]+)(?:\s|$)/.exec(gitResult.stderr)?.[1];
+  const stableRefusals = new Set([
+    'identity-required',
+    'estate-required',
+    'estate-host-mismatch',
+    'cross-estate-resolution',
+    'no-token-for-identity',
+    'tea-login-missing',
+    'tea-login-host-mismatch',
+    'provider-identity-mismatch',
+    'credential-rejected',
+    'permission-denied',
+    'organization-membership-required',
+    'team-membership-required',
+  ]);
+  const gitReasonCode =
+    gitResult.status === 0
+      ? 'transport-accepted'
+      : marker !== undefined && stableRefusals.has(marker) && gitResult.stdout.length === 0
+        ? marker
+        : 'transport-indeterminate';
+  const observed =
+    api.outcome === 'refused' &&
+    gitReasonCode !== 'transport-accepted' &&
+    gitReasonCode !== 'transport-indeterminate' &&
+    gitReasonCode === api.reasonCode;
+  return {
+    observed,
+    reasonCode: observed ? api.reasonCode : 'permission-evidence-disagrees',
+    gitReasonCode,
+    apiReasonCode: api.reasonCode,
+  };
+}
+
+export function repairBrainDoctor(
+  input: {
+    readonly registrySource: string;
+    readonly targetGitUrl: string;
+    readonly brainNamespace: string;
+    readonly identity: string;
+    readonly root: string;
+  },
+  run: CommandRunner,
+): DoctorRuntimeReport {
+  const target = deriveBrainTarget(input.registrySource, input.targetGitUrl, input.brainNamespace);
+  let report = collectBrainDoctorReport(input, run);
+  const actions = planBrainDoctorFix({
+    findings: report.findings,
+    target,
+    identity: input.identity,
+    root: input.root,
+  });
+  for (const action of actions) {
+    if (action.program === 'mosaic') {
+      run({ program: 'mosaic', args: action.args, env: commandEnv(input.identity) });
+      report = collectBrainDoctorReport(input, run);
+      if (report.access.outcome !== 'ok') return report;
+      continue;
+    }
+    if (action.findingCode === 'brain-clone-missing') {
+      try {
+        ensureBrainRootPrivate(input.root);
+      } catch {
+        return collectBrainDoctorReport(input, run);
+      }
+    }
+    const result = runGit(run, input.identity, action.args);
+    if (result.status !== 0) return collectBrainDoctorReport(input, run);
+  }
+  return collectBrainDoctorReport(input, run);
+}
+
+function requireSuccess(result: CommandResult, operation: string): void {
+  if (result.status !== 0) throw new Error(`${operation}-failed`);
+}
+
+function containedRelative(root: string, path: string): string {
+  if (isAbsolute(path) === false) throw new Error('brain-publish-path-must-be-absolute');
+  const absoluteRoot = resolve(root);
+  const absolutePath = resolve(path);
+  if (absolutePath === absoluteRoot || !absolutePath.startsWith(`${absoluteRoot}${sep}`)) {
+    throw new Error('brain-publish-path-escaped-root');
+  }
+  return relative(absoluteRoot, absolutePath).split(sep).join('/');
+}
+
+export function publishBrainPaths(
+  input: {
+    readonly root: string;
+    readonly identity: string;
+    readonly entries: readonly {
+      readonly path: string;
+      readonly content: Uint8Array;
+    }[];
+    readonly message: string;
+  },
+  run: CommandRunner,
+): PublishEvidence {
+  if (input.entries.length === 0) throw new Error('brain-publish-paths-empty');
+  if (input.message.trim().length === 0) throw new Error('brain-publish-message-empty');
+  const entries = input.entries.map((entry) => {
+    if (entry.content.byteLength > MAX_PUBLISH_ENTRY_BYTES) {
+      throw new Error('brain-publish-entry-too-large');
+    }
+    return {
+      path: containedRelative(input.root, entry.path),
+      content: Uint8Array.from(entry.content),
+    };
+  });
+  const paths = entries.map((entry): string => entry.path);
+  if (new Set(paths).size !== paths.length) throw new Error('brain-publish-path-duplicate');
+
+  const readHead = (): string => {
+    const result = runGit(run, input.identity, ['-C', input.root, 'rev-parse', 'HEAD']);
+    requireSuccess(result, 'brain-git-read-commit');
+    const value = result.stdout.trim();
+    if (!COMMIT.test(value)) throw new Error('brain-git-commit-shape-invalid');
+    return value;
+  };
+  const verifyCommitIdentity = (commit: string): void => {
+    const result = runGit(run, input.identity, [
+      '-C',
+      input.root,
+      'show',
+      '-s',
+      '--format=%an%x00%ae%x00%cn%x00%ce',
+      commit,
+    ]);
+    requireSuccess(result, 'brain-git-read-commit-identity');
+    const expectedEmail = `${input.identity}@fleet.mosaicstack.dev`;
+    const [author, authorEmail, committer, committerEmail] = result.stdout.trimEnd().split('\0');
+    if (
+      author !== input.identity ||
+      authorEmail !== expectedEmail ||
+      committer !== input.identity ||
+      committerEmail !== expectedEmail
+    ) {
+      throw new Error('brain-git-commit-identity-mismatch');
+    }
+  };
+  const expectedObjects = new Map<string, string>();
+  const verifyCommitObjects = (commit: string): void => {
+    for (const [path, expected] of expectedObjects) {
+      const result = runGit(run, input.identity, [
+        '-C',
+        input.root,
+        'rev-parse',
+        `${commit}:${path}`,
+      ]);
+      requireSuccess(result, 'brain-git-read-commit-object');
+      if (result.stdout.trim() !== expected) throw new Error('brain-git-commit-content-mismatch');
+    }
+  };
+  const reconcileRealIndex = (): void => {
+    for (const [path, objectId] of expectedObjects) {
+      requireSuccess(
+        runGit(run, input.identity, [
+          '-C',
+          input.root,
+          'update-index',
+          '--add',
+          '--cacheinfo',
+          '100644',
+          objectId,
+          path,
+        ]),
+        'brain-git-reconcile-checkout-index',
+      );
+    }
+  };
+  const verifyCommitPaths = (commit: string): void => {
+    const changed = runGit(run, input.identity, [
+      '-C',
+      input.root,
+      'diff-tree',
+      '--root',
+      '--no-commit-id',
+      '--name-only',
+      '-r',
+      '-z',
+      commit,
+    ]);
+    requireSuccess(changed, 'brain-git-read-commit-paths');
+    const names = changed.stdout.split('\0').filter(Boolean);
+    const approved = new Set(paths);
+    if (names.length === 0 || names.some((name: string): boolean => !approved.has(name))) {
+      throw new Error('brain-git-commit-paths-unapproved');
+    }
+  };
+
+  const base = readHead();
+  const indexRoot = mkdtempSync(join(tmpdir(), 'mosaic-brain-index-'));
+  const isolatedEnv = { GIT_INDEX_FILE: join(indexRoot, 'index') };
+  let commit = base;
+  let createdCommit = false;
+  try {
+    requireSuccess(
+      runGitWithEnv(run, input.identity, ['-C', input.root, 'read-tree', base], isolatedEnv),
+      'brain-git-isolated-index-init',
+    );
+    for (const entry of entries) {
+      const object = runGitWithEnv(
+        run,
+        input.identity,
+        ['-C', input.root, 'hash-object', '-w', '--stdin'],
+        isolatedEnv,
+        entry.content,
+      );
+      requireSuccess(object, 'brain-git-write-approved-object');
+      const objectId = object.stdout.trim();
+      if (!GIT_OBJECT.test(objectId)) throw new Error('brain-git-object-shape-invalid');
+      expectedObjects.set(entry.path, objectId);
+      requireSuccess(
+        runGitWithEnv(
+          run,
+          input.identity,
+          [
+            '-C',
+            input.root,
+            'update-index',
+            '--add',
+            '--cacheinfo',
+            '100644',
+            objectId,
+            entry.path,
+          ],
+          isolatedEnv,
+        ),
+        'brain-git-stage-approved-object',
+      );
+    }
+    const difference = runGitWithEnv(
+      run,
+      input.identity,
+      ['-C', input.root, 'diff', '--cached', '--quiet', '--exit-code', base, '--', ...paths],
+      isolatedEnv,
+    );
+    if (difference.status === 1) {
+      requireSuccess(
+        runGitWithEnv(
+          run,
+          input.identity,
+          [
+            '-C',
+            input.root,
+            '-c',
+            `user.name=${input.identity}`,
+            '-c',
+            `user.email=${input.identity}@fleet.mosaicstack.dev`,
+            'commit',
+            '-m',
+            input.message,
+          ],
+          isolatedEnv,
+        ),
+        'brain-git-commit',
+      );
+      commit = readHead();
+      verifyCommitPaths(commit);
+      verifyCommitObjects(commit);
+      verifyCommitIdentity(commit);
+      reconcileRealIndex();
+      createdCommit = true;
+    } else if (difference.status !== 0) {
+      throw new Error('brain-git-isolated-diff-failed');
+    }
+  } finally {
+    rmSync(indexRoot, { recursive: true, force: true });
+  }
+
+  let pushed = !createdCommit;
+  for (let attempt = 0; createdCommit && attempt < 3; attempt += 1) {
+    const push = runGit(run, input.identity, ['-C', input.root, 'push', 'origin', 'HEAD:main']);
+    if (push.status === 0) {
+      pushed = true;
+      break;
+    }
+    const concurrentUpdate = /non-fast-forward|fetch first|\[rejected\]/i.test(push.stderr);
+    if (!concurrentUpdate || attempt === 2) throw new Error('brain-git-push-failed');
+    requireSuccess(
+      runGit(run, input.identity, ['-C', input.root, 'fetch', 'origin', 'main']),
+      'brain-git-fetch-concurrent',
+    );
+    requireSuccess(
+      runGit(run, input.identity, [
+        '-C',
+        input.root,
+        '-c',
+        `user.name=${input.identity}`,
+        '-c',
+        `user.email=${input.identity}@fleet.mosaicstack.dev`,
+        'rebase',
+        'origin/main',
+      ]),
+      'brain-git-rebase-concurrent',
+    );
+    commit = readHead();
+    verifyCommitPaths(commit);
+    verifyCommitObjects(commit);
+    verifyCommitIdentity(commit);
+  }
+  if (!pushed) throw new Error('brain-git-push-failed');
+  requireSuccess(
+    runGit(run, input.identity, ['-C', input.root, 'fetch', 'origin', 'main']),
+    'brain-git-fetch-readback',
+  );
+  const reachableResult = runGit(run, input.identity, [
+    '-C',
+    input.root,
+    'merge-base',
+    '--is-ancestor',
+    commit,
+    'origin/main',
+  ]);
+  if (reachableResult.status !== 0 && reachableResult.status !== 1) {
+    throw new Error('brain-git-reachability-check-failed');
+  }
+  const remoteResult = runGit(run, input.identity, ['-C', input.root, 'rev-parse', 'origin/main']);
+  requireSuccess(remoteResult, 'brain-git-read-remote-head');
+  const remoteHead = remoteResult.stdout.trim();
+  if (!COMMIT.test(remoteHead)) throw new Error('brain-git-remote-head-shape-invalid');
+  return { commit, remoteHead, reachable: reachableResult.status === 0 };
+}
@@ -131,14 +131,13 @@ async function exists(path: string): Promise<boolean> {
 }

 describe('projectRosterV2AgentGeneratedEnv', (): void => {
-  it('maps a roster-v2 agent to exactly the nine generated projection keys', (): void => {
+  it('maps a roster-v2 agent to exactly the eight generated projection keys', (): void => {
    const roster = parseRosterV2(rosterYaml, 'yaml');
    const agent = roster.agents.find((candidate) => candidate.name === 'coder0');
    expect(agent).toBeDefined();
    const values = projectRosterV2AgentGeneratedEnv(roster, agent!);
    expect(values).toEqual({
      MOSAIC_AGENT_NAME: 'coder0',
-      MOSAIC_GIT_IDENTITY: 'coder0',
      MOSAIC_AGENT_CLASS: 'code',
      MOSAIC_AGENT_RUNTIME: 'pi',
      MOSAIC_AGENT_MODEL: 'gpt-5.6-sol',
@@ -422,7 +422,6 @@ describe('fleet roster parsing', () => {
    expect(generateAgentEnv(roster, getRosterAgent(roster, 'coder0'))).toBe(
      [
        'MOSAIC_AGENT_NAME=coder0',
-        'MOSAIC_GIT_IDENTITY=coder0',
        // Reflects the roster's canonicalized compatibility class (A3a).
        'MOSAIC_AGENT_CLASS=code',
        'MOSAIC_AGENT_RUNTIME=codex',
@@ -3800,7 +3799,6 @@ describe('fleet add command', () => {
      'utf8',
    );
    expect(envContent).toContain('MOSAIC_AGENT_NAME=coder0');
-    expect(envContent).toContain('MOSAIC_GIT_IDENTITY=coder0');
    expect(envContent).toContain('MOSAIC_AGENT_RUNTIME=codex');
  });

@@ -484,7 +484,6 @@ function generateAgentEnvValues(
  const workingDirectory = agent.workingDirectory ?? roster.defaults.workingDirectory;
  return {
    MOSAIC_AGENT_NAME: agent.name,
-    MOSAIC_GIT_IDENTITY: agent.name,
    MOSAIC_AGENT_CLASS: agent.className,
    MOSAIC_AGENT_RUNTIME: agent.runtime,
    MOSAIC_AGENT_MODEL: agent.modelHint ?? '',
@@ -29,6 +29,11 @@ import { readPersonaContractBlock } from '../fleet/persona-contract.js';
 import { canonicalizeRoleClass } from './fleet-personas.js';
 import { launchClaudex, type ClaudexHarnessAdapter } from './claudex.js';
 import { runLeaseEnforcementDoctorCheck } from './lease-doctor-check.js';
+import {
+  defaultInstalledBrainDoctorOptions,
+  runInstalledBrainDoctorCheck,
+} from './brain-doctor-check.js';
+import { systemCommandRunner } from './brain-store-runtime.js';

 const MOSAIC_HOME = process.env['MOSAIC_HOME'] ?? join(homedir(), '.config', 'mosaic');
 const MAX_INSTALLED_TOOLS_BYTES = 256 * 1024;
@@ -1257,8 +1262,11 @@ export function registerLaunchCommands(program: Command): void {
      });
  }

-  // `doctor` — the framework drift audit (bash script) PLUS the #869
-  // Point-1 C5 lease-enforcement activation check (TS, reusing C1's
+  // `doctor` — the framework drift audit (bash script), the #869
+  // Point-1 C5 lease-enforcement activation check, and the #1051 per-estate
+  // durable brain check. Both TS checks run before the bash audit and can
+  // force a non-zero result for hard/indeterminate failures.
+  // The lease check reuses C1's
  // `leaseEnforcementActivatable()` and C3's `checkBrokerSupervisorHealth()`).
  // Kept out of the generic `directCommands` loop above because this check
  // must run and report BEFORE the bash script's own exit, and must be able
@@ -1267,14 +1275,29 @@ export function registerLaunchCommands(program: Command): void {
  // undiagnosed (see lease-doctor-check.ts docstring).
  program
    .command('doctor')
-    .description('Health audit — detect drift, missing files, and #869 lease-activation gaps')
+    .description('Health audit — detect drift, lease gaps, and per-estate brain defects')
    .allowUnknownOption(true)
    .allowExcessArguments(true)
    .action(async (_opts: unknown, cmd: Command) => {
      checkMosaicHome();
      const leaseCheck = await runLeaseEnforcementDoctorCheck();
      const leaseCheckFailed = printLeaseDoctorCheck(leaseCheck);
-      runDoctorScriptAndExit(fwScript('mosaic-doctor'), cmd.args, leaseCheckFailed);
+      const fix = cmd.args.includes('--fix');
+      const brainCheck = runInstalledBrainDoctorCheck(
+        defaultInstalledBrainDoctorOptions(fix),
+        systemCommandRunner,
+      );
+      for (const line of brainCheck.lines) {
+        (brainCheck.status === 'ok' ? console.log : console.error)(line);
+      }
+      const brainCheckFailed =
+        brainCheck.status === 'error' ||
+        (brainCheck.status === 'warn' && cmd.args.includes('--fail-on-warn'));
+      runDoctorScriptAndExit(
+        fwScript('mosaic-doctor'),
+        cmd.args,
+        leaseCheckFailed || brainCheckFailed,
+      );
    });
 }

@@ -0,0 +1,52 @@
+import type {
+  ProviderIdentityEvidenceDto,
+  ReceivePackEvidenceDto,
+  RepositoryPermission,
+  RepositoryPermissionEvidenceDto,
+} from './credential-result.dto.js';
+
+export interface ResolvedCredential {
+  readonly identity: string;
+  readonly estate: string;
+  readonly host: string;
+  readonly resolutionId: string;
+  readonly secret: Uint8Array;
+}
+
+export interface CredentialResolver {
+  resolve(identity: string, estate: string, host: string): Promise<ResolvedCredential | undefined>;
+}
+
+export interface GiteaCredentialProvider {
+  readIdentity(resolved: ResolvedCredential): Promise<ProviderIdentityEvidenceDto>;
+  readRepositoryPermission(
+    resolved: ResolvedCredential,
+    repo: string,
+  ): Promise<RepositoryPermissionEvidenceDto>;
+  probeReceivePack(
+    resolved: ResolvedCredential | undefined,
+    repo: string,
+  ): Promise<ReceivePackEvidenceDto>;
+}
+
+export interface CredentialEstateRegistry {
+  matches(estate: string, host: string): boolean;
+}
+
+export interface CredentialValidationDependencies {
+  readonly resolver: CredentialResolver;
+  readonly provider: GiteaCredentialProvider;
+  readonly estateRegistry: CredentialEstateRegistry;
+}
+
+export interface GiteaReadValidationRequestDto {
+  readonly identity: string;
+  readonly estate: string;
+  readonly host: string;
+  readonly repo: string;
+  readonly requiredPermission?: RepositoryPermission;
+}
+
+export interface GiteaWriteValidationRequestDto extends GiteaReadValidationRequestDto {
+  readonly readOnlyControlIdentity: string;
+}
@@ -0,0 +1,84 @@
+export type CredentialOutcome = 'ok' | 'refused' | 'error' | 'indeterminate';
+export type CredentialMutationState = 'none' | 'not-started' | 'applied' | 'unknown';
+export type RepositoryPermission = 'none' | 'read' | 'write' | 'admin';
+export type ReceivePackState = 'advertised' | 'refused';
+
+export interface CredentialReasonDto {
+  readonly code: string;
+  readonly message: string;
+}
+
+export interface CredentialSubjectDto {
+  readonly identity: string;
+  readonly estate: string;
+  readonly host: string;
+  readonly repo: string;
+}
+
+export interface ProviderIdentityEvidenceDto {
+  readonly login: string;
+  readonly endpoint: string;
+  readonly contentType: string;
+}
+
+export interface RepositoryPermissionEvidenceDto {
+  readonly effective: RepositoryPermission;
+  readonly endpoint: string;
+  readonly contentType: string;
+}
+
+export interface ReceivePackEvidenceDto {
+  readonly state: ReceivePackState;
+  readonly principal: string | null;
+  readonly resolutionId: string | null;
+  readonly contentType: string;
+}
+
+export interface ReadOnlyControlEvidenceDto {
+  readonly identity: string;
+  readonly providerPermission: RepositoryPermission;
+  readonly receivePack: ReceivePackState;
+}
+
+export interface WriteDifferentialEvidenceDto {
+  readonly state: 'can-write';
+  readonly credentialBinding: 'same-resolution';
+  readonly transportPrincipal: string;
+  readonly authenticatedReceivePack: 'advertised';
+  readonly readOnlyControl: ReadOnlyControlEvidenceDto;
+  readonly unauthenticatedReceivePack: 'refused';
+  readonly artifactCreated: false;
+  readonly proves: string;
+  readonly doesNotProve: string;
+}
+
+export interface TokenCapabilitiesEvidenceDto {
+  readonly state: 'measured' | 'not-measured';
+  readonly scopes: readonly string[];
+  readonly source: 'provider-token-object' | 'runtime-not-authorized';
+}
+
+export interface CredentialValidationEvidenceDto {
+  readonly providerIdentity: ProviderIdentityEvidenceDto | null;
+  readonly tokenCapabilities: TokenCapabilitiesEvidenceDto;
+  readonly repositoryPermission: RepositoryPermissionEvidenceDto | null;
+  readonly writeDifferential: WriteDifferentialEvidenceDto | null;
+}
+
+export interface CredentialAuditResultDto {
+  readonly journalId: string | null;
+  readonly state: 'not-started' | 'open' | 'sealed';
+}
+
+export interface CredentialValidationResultDto {
+  readonly schemaVersion: 1;
+  readonly operation: 'validate' | 'whoami';
+  readonly outcome: CredentialOutcome;
+  readonly exitCode: 0 | 10 | 20 | 30;
+  readonly retryable: boolean;
+  readonly subject: CredentialSubjectDto;
+  readonly mutation: CredentialMutationState;
+  readonly reason: CredentialReasonDto;
+  readonly evidence: CredentialValidationEvidenceDto;
+  readonly audit: CredentialAuditResultDto;
+}
@@ -0,0 +1,15 @@
+export type CredentialProviderKind = 'gitea';
+
+export interface CredentialHostConfigDto {
+  readonly host: string;
+  readonly provider: CredentialProviderKind;
+  readonly apiBaseUrl: string;
+  readonly tokenPrefix: string;
+}
+
+export interface CredentialEstateConfigDto {
+  readonly name: string;
+  readonly readOnlyControlIdentity?: string;
+  readonly inventoryAuthorityIdentity?: string;
+  readonly hosts: readonly CredentialHostConfigDto[];
+}
@@ -0,0 +1,100 @@
+import { describe, expect, it } from 'vitest';
+import { parseCredentialEstateRegistry } from './estate-registry.js';
+
+const validRegistry = JSON.stringify({
+  version: 1,
+  estates: [
+    {
+      name: 'homelab',
+      readOnlyControlIdentity: 'read-control',
+      hosts: [
+        {
+          host: 'git.example.invalid',
+          provider: 'gitea',
+          apiBaseUrl: 'https://git.example.invalid',
+          tokenPrefix: 'gitea-example',
+        },
+      ],
+    },
+  ],
+});
+
+describe('credential estate registry', (): void => {
+  it('requires an exact declared estate-host pair', (): void => {
+    const registry = parseCredentialEstateRegistry(validRegistry);
+
+    expect(registry.matches('homelab', 'git.example.invalid')).toBe(true);
+    expect(registry.matches('usc', 'git.example.invalid')).toBe(false);
+    expect(registry.matches('homelab', 'other.example.invalid')).toBe(false);
+    expect(registry.resolveByHost('git.example.invalid')).toMatchObject({
+      estate: 'homelab',
+      host: { host: 'git.example.invalid', provider: 'gitea' },
+    });
+    expect(registry.resolveByHost('other.example.invalid')).toBeUndefined();
+  });
+
+  it('rejects a provider URL whose host differs from the declared host', (): void => {
+    const source = validRegistry.replace(
+      'https://git.example.invalid',
+      'https://other.example.invalid',
+    );
+
+    expect(() => parseCredentialEstateRegistry(source)).toThrow(/api-host-mismatch/);
+  });
+
+  it('rejects one host assigned to multiple estates', (): void => {
+    const source = JSON.stringify({
+      version: 1,
+      estates: [
+        {
+          name: 'homelab',
+          hosts: [
+            {
+              host: 'git.example.invalid',
+              provider: 'gitea',
+              apiBaseUrl: 'https://git.example.invalid',
+              tokenPrefix: 'gitea-example',
+            },
+          ],
+        },
+        {
+          name: 'other',
+          hosts: [
+            {
+              host: 'git.example.invalid',
+              provider: 'gitea',
+              apiBaseUrl: 'https://git.example.invalid',
+              tokenPrefix: 'gitea-other',
+            },
+          ],
+        },
+      ],
+    });
+
+    expect(() => parseCredentialEstateRegistry(source)).toThrow(/duplicate-host/);
+  });
+
+  it('rejects URLs with userinfo, path, query, fragment, trailing slash, or non-HTTPS scheme', (): void => {
+    for (const apiBaseUrl of [
+      'http://git.example.invalid',
+      'https://[email protected]',
+      'https://git.example.invalid/',
+      'https://git.example.invalid/api',
+      'https://git.example.invalid?x=1',
+      'https://git.example.invalid#x',
+    ]) {
+      const source = validRegistry.replace('https://git.example.invalid', apiBaseUrl);
+      expect(() => parseCredentialEstateRegistry(source), apiBaseUrl).toThrow(/invalid-api-url/);
+    }
+  });
+
+  it('requires a configured read-only control for write validation', (): void => {
+    const registry = parseCredentialEstateRegistry(validRegistry);
+    const withoutControl = parseCredentialEstateRegistry(
+      validRegistry.replace('"readOnlyControlIdentity":"read-control",', ''),
+    );
+
+    expect(registry.readOnlyControl('homelab')).toBe('read-control');
+    expect(() => withoutControl.readOnlyControl('homelab')).toThrow(/read-only-control-missing/);
+  });
+});
@@ -0,0 +1,167 @@
+import { z } from 'zod';
+import type { CredentialEstateRegistry } from './credential-provider.dto.js';
+import type { CredentialEstateConfigDto, CredentialHostConfigDto } from './estate-registry.dto.js';
+
+const NAME = /^[a-z0-9][a-z0-9-]*$/;
+const IDENTITY = /^[A-Za-z0-9][A-Za-z0-9_.-]*$/;
+const HOST = /^[a-z0-9](?:[a-z0-9.-]*[a-z0-9])?$/;
+
+const hostSchema = z
+  .object({
+    host: z.string().regex(HOST),
+    provider: z.literal('gitea'),
+    apiBaseUrl: z.string(),
+    tokenPrefix: z.string().regex(NAME),
+  })
+  .strict();
+
+const estateSchema = z
+  .object({
+    name: z.string().regex(NAME),
+    readOnlyControlIdentity: z.string().regex(IDENTITY).optional(),
+    inventoryAuthorityIdentity: z.string().regex(IDENTITY).optional(),
+    hosts: z.array(hostSchema).min(1),
+  })
+  .strict();
+
+const registrySchema = z
+  .object({
+    version: z.literal(1),
+    estates: z.array(estateSchema).min(1),
+  })
+  .strict();
+
+export class CredentialEstateRegistryError extends Error {
+  constructor(
+    public readonly code: string,
+    message: string,
+  ) {
+    super(`Credential estate registry rejected: code=${code} ${message}`);
+    this.name = 'CredentialEstateRegistryError';
+  }
+}
+
+function validateApiUrl(host: CredentialHostConfigDto): void {
+  let url: URL;
+  try {
+    url = new URL(host.apiBaseUrl);
+  } catch (error: unknown) {
+    const detail = error instanceof Error ? error.message : String(error);
+    throw new CredentialEstateRegistryError('invalid-api-url', detail);
+  }
+  if (
+    url.protocol !== 'https:' ||
+    url.username !== '' ||
+    url.password !== '' ||
+    url.pathname !== '/' ||
+    host.apiBaseUrl !== url.origin ||
+    url.search !== '' ||
+    url.hash !== ''
+  ) {
+    throw new CredentialEstateRegistryError(
+      'invalid-api-url',
+      'provider API URL must be an HTTPS origin without userinfo, path, query, or fragment',
+    );
+  }
+  if (url.hostname !== host.host) {
+    throw new CredentialEstateRegistryError(
+      'api-host-mismatch',
+      'provider API URL hostname does not equal the declared host',
+    );
+  }
+}
+
+export class ParsedCredentialEstateRegistry implements CredentialEstateRegistry {
+  private readonly estates: ReadonlyMap<string, CredentialEstateConfigDto>;
+
+  constructor(estates: readonly CredentialEstateConfigDto[]) {
+    this.estates = new Map(
+      estates.map(
+        (estate: CredentialEstateConfigDto): readonly [string, CredentialEstateConfigDto] => [
+          estate.name,
+          estate,
+        ],
+      ),
+    );
+  }
+
+  matches(estate: string, host: string): boolean {
+    return this.resolve(estate, host) !== undefined;
+  }
+
+  resolve(estate: string, host: string): CredentialHostConfigDto | undefined {
+    return this.estates
+      .get(estate)
+      ?.hosts.find((candidate: CredentialHostConfigDto): boolean => candidate.host === host);
+  }
+
+  resolveByHost(
+    host: string,
+  ): { readonly estate: string; readonly host: CredentialHostConfigDto } | undefined {
+    for (const [estate, config] of this.estates) {
+      const match = config.hosts.find(
+        (candidate: CredentialHostConfigDto): boolean => candidate.host === host,
+      );
+      if (match !== undefined) return { estate, host: match };
+    }
+    return undefined;
+  }
+
+  inventoryAuthority(estate: string): string {
+    const identity = this.estates.get(estate)?.inventoryAuthorityIdentity;
+    if (identity === undefined) {
+      throw new CredentialEstateRegistryError(
+        'inventory-authority-missing',
+        `estate ${estate} has no delegated inventory authority identity`,
+      );
+    }
+    return identity;
+  }
+
+  readOnlyControl(estate: string): string {
+    const identity = this.estates.get(estate)?.readOnlyControlIdentity;
+    if (identity === undefined) {
+      throw new CredentialEstateRegistryError(
+        'read-only-control-missing',
+        `estate ${estate} has no provider-confirmed read-only control identity`,
+      );
+    }
+    return identity;
+  }
+}
+
+export function parseCredentialEstateRegistry(source: string): ParsedCredentialEstateRegistry {
+  let raw: unknown;
+  try {
+    raw = JSON.parse(source);
+  } catch (error: unknown) {
+    const detail = error instanceof Error ? error.message : String(error);
+    throw new CredentialEstateRegistryError('invalid-json', detail);
+  }
+
+  const parsed = registrySchema.safeParse(raw);
+  if (!parsed.success) {
+    throw new CredentialEstateRegistryError(
+      'invalid-schema',
+      parsed.error.issues[0]?.message ?? 'invalid',
+    );
+  }
+
+  const estateNames = new Set<string>();
+  const hostNames = new Set<string>();
+  for (const estate of parsed.data.estates) {
+    if (estateNames.has(estate.name)) {
+      throw new CredentialEstateRegistryError('duplicate-estate', estate.name);
+    }
+    estateNames.add(estate.name);
+    for (const host of estate.hosts) {
+      validateApiUrl(host);
+      if (hostNames.has(host.host)) {
+        throw new CredentialEstateRegistryError('duplicate-host', host.host);
+      }
+      hostNames.add(host.host);
+    }
+  }
+
+  return new ParsedCredentialEstateRegistry(parsed.data.estates);
+}
@@ -358,7 +358,6 @@ function generatedValues(
 ): Readonly<Record<string, string>> {
  return {
    MOSAIC_AGENT_NAME: agent.name,
-    MOSAIC_GIT_IDENTITY: agent.name,
    MOSAIC_AGENT_CLASS: agent.className,
    MOSAIC_AGENT_RUNTIME: agent.runtime,
    MOSAIC_AGENT_MODEL: agent.model,
@@ -380,7 +380,7 @@ const COMMAND_RECORDS: Readonly<Record<string, RegExp>> = {

 const DATA_PROFILE_BODIES: Readonly<Record<string, string>> = {
  'DATA.DOTENV.FLEET_LAUNCH':
-    'MOSAIC_AGENT_NAME=<roster name>\nMOSAIC_GIT_IDENTITY=<roster name>\nMOSAIC_AGENT_CLASS=<roster class>\nMOSAIC_AGENT_RUNTIME=<roster runtime>\nMOSAIC_AGENT_MODEL=<roster model hint>\nMOSAIC_AGENT_REASONING=<roster reasoning>\nMOSAIC_AGENT_TOOL_POLICY=<roster tool policy>\nMOSAIC_AGENT_WORKDIR=<absolute roster work directory>\nMOSAIC_TMUX_SOCKET=<roster socket or empty>',
+    'MOSAIC_AGENT_NAME=<roster name>\nMOSAIC_AGENT_CLASS=<roster class>\nMOSAIC_AGENT_RUNTIME=<roster runtime>\nMOSAIC_AGENT_MODEL=<roster model hint>\nMOSAIC_AGENT_REASONING=<roster reasoning>\nMOSAIC_AGENT_TOOL_POLICY=<roster tool policy>\nMOSAIC_AGENT_WORKDIR=<absolute roster work directory>\nMOSAIC_TMUX_SOCKET=<roster socket or empty>',
  'DATA.TEXT_TABLE.FLEET_TASKS':
    '| W-FLEET | in-progress | Fleet (agent-session execution layer) | Phase 2/5 | docs/fleet/TASKS.md | observability dogfooded on live stub fleet; control plane rides federation (W1) |',
  'DATA.TEXT_DIAGRAM.BACKLOG_FLOW':
@@ -406,7 +406,7 @@ const DATA_PROFILE_BODIES: Readonly<Record<string, string>> = {
  'DATA.JSON.MUTATION_RESULT':
    '{\n  "applied": false,\n  "authoritativeRoster": "committed",\n  "projections": "incomplete",\n  "recovery": {\n    "code": "projection-apply-failed",\n    "action": "regenerate-projections-from-roster"\n  }\n}',
  'DATA.DOTENV.GENERATED_ENV':
-    'MOSAIC_AGENT_NAME=<roster name>\nMOSAIC_GIT_IDENTITY=<roster name>\nMOSAIC_AGENT_CLASS=<roster class>\nMOSAIC_AGENT_RUNTIME=<roster runtime>\nMOSAIC_AGENT_MODEL=<roster model hint>\nMOSAIC_AGENT_REASONING=<roster reasoning>\nMOSAIC_AGENT_TOOL_POLICY=<roster tool policy>\nMOSAIC_AGENT_WORKDIR=<absolute roster work directory>\nMOSAIC_TMUX_SOCKET=<roster socket or empty>',
+    'MOSAIC_AGENT_NAME=<roster name>\nMOSAIC_AGENT_CLASS=<roster class>\nMOSAIC_AGENT_RUNTIME=<roster runtime>\nMOSAIC_AGENT_MODEL=<roster model hint>\nMOSAIC_AGENT_REASONING=<roster reasoning>\nMOSAIC_AGENT_TOOL_POLICY=<roster tool policy>\nMOSAIC_AGENT_WORKDIR=<absolute roster work directory>\nMOSAIC_TMUX_SOCKET=<roster socket or empty>',
  'DATA.YAML.ROSTER_FIELDS':
    'version: 2\ngeneration: 1\ntransport: tmux\ntmux:\n  socket_name: mosaic-fleet\n  holder_session: _holder\ndefaults:\n  working_directory: ~/src\n  runtime: pi\nruntimes:\n  pi:\n    reset_command: /new\nagents:\n  - name: coder0\n    alias: Coder 0\n    class: code\n    runtime: pi\n    provider: openai\n    model: gpt-5.6-sol\n    reasoning: high\n    tool_policy: code\n    working_directory: ~/src\n    persistent_persona: false\n    reset_between_tasks: true\n    lifecycle:\n      enabled: true\n      desired_state: stopped\n    launch:\n      yolo: true',
 };
@@ -922,8 +922,8 @@ describe('fleet operator documentation', (): void => {
    );
    expect(
      surfaces.filter((surface): boolean => surface.category === 'InlineLiteral'),
-    ).toHaveLength(863);
-    expect(surfaces).toHaveLength(887);
+    ).toHaveLength(858);
+    expect(surfaces).toHaveLength(882);

    const rosterSource = await readFile(join(fleetDocs, 'examples', 'roster-v2.yaml'), 'utf8');
    const auxiliary: CodeSurface = {
@@ -597,7 +597,6 @@ export function projectRosterV2AgentGeneratedEnv(
 ): Readonly<Record<string, string>> {
  return {
    MOSAIC_AGENT_NAME: agent.name,
-    MOSAIC_GIT_IDENTITY: agent.name,
    MOSAIC_AGENT_CLASS: agent.className,
    MOSAIC_AGENT_RUNTIME: agent.runtime,
    MOSAIC_AGENT_MODEL: agent.model,
@@ -22,7 +22,6 @@ import {

 const generatedValues = {
  MOSAIC_AGENT_NAME: 'coder0',
-  MOSAIC_GIT_IDENTITY: 'coder0',
  MOSAIC_AGENT_CLASS: 'code',
  MOSAIC_AGENT_RUNTIME: 'pi',
  MOSAIC_AGENT_MODEL: 'openai-codex/gpt-5.6-sol',
@@ -46,7 +45,6 @@ describe('generated fleet agent environment boundary', (): void => {
    expect(renderGeneratedAgentEnvironment(generatedValues)).toBe(
      [
        'MOSAIC_AGENT_NAME=coder0',
-        'MOSAIC_GIT_IDENTITY=coder0',
        'MOSAIC_AGENT_CLASS=code',
        'MOSAIC_AGENT_RUNTIME=pi',
        'MOSAIC_AGENT_MODEL=openai-codex/gpt-5.6-sol',
@@ -80,22 +78,6 @@ describe('generated fleet agent environment boundary', (): void => {
    expect(String(error)).toMatch(/key=.*sha256=/);
  });

-  it.each([
-    ['unsafe-git-identity', 'other/identity'],
-    ['git-identity-mismatch', 'reviewer0'],
-  ])('rejects %s before any launch consumer can use it', (code: string, identity: string): void => {
-    expect((): void => {
-      renderGeneratedAgentEnvironment({
-        ...generatedValues,
-        MOSAIC_GIT_IDENTITY: identity,
-      });
-    }).toThrow(
-      expect.objectContaining({
-        diagnostic: expect.objectContaining({ code, key: 'MOSAIC_GIT_IDENTITY' }),
-      }),
-    );
-  });
-
  it('rejects unsafe generated paths before any launch consumer can use them', (): void => {
    expect((): void => {
      renderGeneratedAgentEnvironment({
@@ -73,7 +73,6 @@ export class AgentEnvBoundaryError extends Error {

 export const GENERATED_AGENT_ENV_KEYS = [
  'MOSAIC_AGENT_NAME',
-  'MOSAIC_GIT_IDENTITY',
  'MOSAIC_AGENT_CLASS',
  'MOSAIC_AGENT_RUNTIME',
  'MOSAIC_AGENT_MODEL',
@@ -403,7 +402,6 @@ function assertGeneratedValues(values: Readonly<Record<string, string>>): void {
    if (value === undefined) throw new AgentEnvBoundaryError('missing-key', key, '');
  }
  const name = requiredGeneratedValue(values, 'MOSAIC_AGENT_NAME');
-  const gitIdentity = requiredGeneratedValue(values, 'MOSAIC_GIT_IDENTITY');
  const className = requiredGeneratedValue(values, 'MOSAIC_AGENT_CLASS');
  const runtime = requiredGeneratedValue(values, 'MOSAIC_AGENT_RUNTIME');
  const model = requiredGeneratedValue(values, 'MOSAIC_AGENT_MODEL');
@@ -414,12 +412,6 @@ function assertGeneratedValues(values: Readonly<Record<string, string>>): void {

  if (!AGENT_NAME.test(name))
    throw new AgentEnvBoundaryError('unsafe-agent-name', 'MOSAIC_AGENT_NAME', name);
-  if (!AGENT_NAME.test(gitIdentity)) {
-    throw new AgentEnvBoundaryError('unsafe-git-identity', 'MOSAIC_GIT_IDENTITY', gitIdentity);
-  }
-  if (gitIdentity !== name) {
-    throw new AgentEnvBoundaryError('git-identity-mismatch', 'MOSAIC_GIT_IDENTITY', gitIdentity);
-  }
  if (!POLICY_NAME.test(className)) {
    throw new AgentEnvBoundaryError('unsafe-class', 'MOSAIC_AGENT_CLASS', className);
  }
@@ -22,6 +22,8 @@ export interface SecureFileSnapshot {
  mode: number;
  dev: number | bigint;
  ino: number | bigint;
+  uid: number;
+  gid: number;
 }

 function sameIdentity(
@@ -235,6 +237,8 @@ export function readRegularFileSecure(
      mode: Number(opened.mode),
      dev: opened.dev,
      ino: opened.ino,
+      uid: opened.uid,
+      gid: opened.gid,
    };
  } finally {
    closeDescriptors(openedFile.descriptors);
@@ -1405,7 +1405,6 @@ function generatedValues(
 ): Readonly<Record<string, string>> {
  return {
    MOSAIC_AGENT_NAME: agent.name,
-    MOSAIC_GIT_IDENTITY: agent.name,
    MOSAIC_AGENT_CLASS: agent.className,
    MOSAIC_AGENT_RUNTIME: agent.runtime,
    MOSAIC_AGENT_MODEL: agent.model,
Author	SHA1	Message	Date
be-coder-07	e91c8c06a5	fix(#1051 ): track canonical estate registry ci/woodpecker/pr/ci Pipeline failed Details	2026-08-05 23:32:23 -05:00
be-coder-07	a50b5a6b4d	fix(mosaic): enforce private brain checkout ci/woodpecker/pr/ci Pipeline failed Details	2026-08-05 17:19:51 -05:00
be-coder-07	22cedbb506	fix(mosaic): reject unapproved brain skeleton state	2026-08-05 17:19:51 -05:00
be-coder-07	bad53564ed	fix(mosaic): preserve measurable brain git state	2026-08-05 17:19:50 -05:00
be-coder-07	518c4185ee	test(mosaic): control brain config owner binding	2026-08-05 17:19:50 -05:00
be-coder-07	877473c244	fix(mosaic): bind brain commits to approved blobs	2026-08-05 17:19:50 -05:00
be-coder-07	f0555016f4	fix(mosaic): isolate brain publication index	2026-08-05 17:19:50 -05:00
be-coder-07	fb7087b3eb	fix(mosaic): quarantine unscanned brain state	2026-08-05 17:19:50 -05:00
be-coder-07	836aab1ab5	fix(mosaic): bound brain migration and owner lookups	2026-08-05 17:19:50 -05:00
be-coder-07	656fa9ceb7	fix(mosaic): fail closed on unsafe brain cleanup and config	2026-08-05 17:19:50 -05:00
be-coder-07	6afb3cb5b3	fix(mosaic): hold brain migration destinations by descriptor	2026-08-05 17:19:50 -05:00
be-coder-07	351cb67cec	fix(mosaic): exclude nested secret migration paths	2026-08-05 17:19:50 -05:00
be-coder-07	fcfc1b08f9	fix(mosaic): harden brain migration snapshots	2026-08-05 17:19:50 -05:00
be-coder-07	2451c2f21a	feat(mosaic): provision per-estate durable brain	2026-08-05 17:19:50 -05:00
be-coder-07	c6329ec91e	test(installer): preregister durable brain P7 integration	2026-08-05 17:19:50 -05:00
be-coder-07	01694f3f98	test(#1051 ): preregister mosaic-brain acceptance contract	2026-08-05 17:19:50 -05:00