docs(remediation): sharpen D-8 — the conformance harness must itself be conformance-tested

Per Mos. Two requirements, both load-bearing:

RM-02: the gate registry must SELF-VERIFY that every registered case demonstrably
runs and demonstrably fails on a known-bad input. Presence in the registry is not
evidence. A check is not trusted until it has been shown to fail. This is mutation
testing / negative control at the registry level — the conformance harness must
itself be conformance-tested. RM-55 inherits the same recursion: the harness must be
observed red before its green means anything.

Reviewer disclosure: rev-974 could have silently substituted a working fixture and
reported AC2 PASS, and nothing would have caught it. The 'if a check is unrunnable,
say so rather than silently substituting' clause is what makes a PASS mean anything,
and must appear in every reviewer brief this mission issues.

Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>

docs/remediation/BOARD-LEDGER.md

@@ -0,0 +1,15 @@
+<!-- board-roll: 1 entry rolled from BOARD.md -->
+
+### **D-1 / P-ACTIVATION + hygiene — committed `.npmrc` hard-pins `store-dir=/root/.local/share/pnpm/store`.**
+
+Correct for the CI container (runs as root), fatal for EVERY non-root local checkout: `EACCES` on `/root/.local/share/pnpm/store/v10/server/server.json`. A committed config that only works on one runtime is exactly the activation-skew class. Fix candidate: make store-dir env-overridable, not hardcoded.
+
+<!-- board-roll: 2 entries rolled from BOARD.md -->
+
+### **D-3 / P-FLEET-001 — the seats running this mission are UNMANAGED.** `mos-remediation`, `rev-974`,
+
+`planner-opus`, `planner-sol` appear in NO roster (`~/.config/mosaic/fleet/roster.yaml`, `agents/`). Planners run on socket `default`; the roster declares `mosaic-fleet`. This is the exact "one roster-owned socket/host + quarantine unmanaged + stale GC" failure P-FLEET-001 indicts — observed on the remediation mission's own fleet. Prerequisite for INBOX identity-addressing.
+
+### **D-2 / hygiene — husky `prepare` fails `EPERM` copying into root-owned `.husky/_/`.** Repo working
+
+tree has root-owned dirs (`.husky/`, repo root) under a non-root agent. Worked around with the intended `HUSKY=0` escape hatch (does NOT disable the existing pre-commit/pre-push hooks).

docs/remediation/BOARD.md

@@ -1,6 +1,6 @@
 # mos-remediation — LIVE BOARD (keep < 8 KB)
 
-**Phase:** PLANNING COMPLETE — reconciled backlog landed; 3 decisions block dispatch.
+**Phase:** EXECUTING — first PR merged; RM-01 in flight; all 3 decisions ruled.
 **Updated:** 2026-07-31 (mos-remediation orchestrator; seat active on `mosaic-fleet`).
 
 ## Head
@@ -16,14 +16,14 @@
 
 ## In-flight
 
-| Task                                              | Owner           | State                                                 |
-| ------------------------------------------------- | --------------- | ----------------------------------------------------- |
-| PR #1026 `remediation/mission-setup` (docs-only)  | mos-remediation | OPEN, stacked on #1025; retarget to main after merge  |
-| PR #1025 `fix/hygiene-inert-format-gate`          | rev-974         | OPEN; ACs pre-registered 22:12:26Z; review DISPATCHED |
-| DECISION-1 wire-in point (charter change)         | Mos / Jason     | ESCALATED — both planners reject the charter's target |
-| DECISION-2 rollback artifact + availability trade | Jason           | ESCALATED                                             |
-| DECISION-3 RM-03 vs parked PR #1023 ownership     | Mos             | ESCALATED                                             |
-| RM-01 reproducible checkout (unblocks everything) | unassigned      | READY TO DISPATCH                                     |
+| Task                                              | Owner           | State                                                              |
+| ------------------------------------------------- | --------------- | ------------------------------------------------------------------ |
+| PR #1026 docs (mission record + backlog)          | mos-remediation | OPEN, retargeted to main, rebased; diff verified docs-only         |
+| PR #1025 hygiene                                  | —               | **MERGED** 52414605; rev-974 APPROVE + CI #2158 8/8 terminal-green |
+| DECISION-1 wire-in point (charter change)         | Mos / Jason     | ESCALATED — both planners reject the charter's target              |
+| DECISION-2 rollback artifact + availability trade | Jason           | ESCALATED                                                          |
+| DECISION-3 RM-03 vs parked PR #1023 ownership     | Mos             | ESCALATED                                                          |
+| RM-01 reproducible checkout (unblocks everything) | unassigned      | READY TO DISPATCH                                                  |
 
 ## Fleet seats
 
@@ -53,37 +53,34 @@
 4. Hygiene + conformance harness
    Cross-cutting retirements: flat-file tracking, 3 MACP islands, silent MOSAIC BYPASS.
 
-## Dogfood evidence captured this session (live failure classes, not hypotheticals)
+## Dogfood evidence — live failure classes, not hypotheticals
 
-- **D-1 / P-ACTIVATION + hygiene — committed `.npmrc` hard-pins `store-dir=/root/.local/share/pnpm/store`.**
-  Correct for the CI container (runs as root), fatal for EVERY non-root local checkout: `EACCES` on
-  `/root/.local/share/pnpm/store/v10/server/server.json`. A committed config that only works on one
-  runtime is exactly the activation-skew class. Fix candidate: make store-dir env-overridable, not hardcoded.
-- **D-2 / hygiene — husky `prepare` fails `EPERM` copying into root-owned `.husky/_/`.** Repo working
-  tree has root-owned dirs (`.husky/`, repo root) under a non-root agent. Worked around with the
-  intended `HUSKY=0` escape hatch (does NOT disable the existing pre-commit/pre-push hooks).
-- **D-3 / P-FLEET-001 — the seats running this mission are UNMANAGED.** `mos-remediation`, `rev-974`,
-  `planner-opus`, `planner-sol` appear in NO roster (`~/.config/mosaic/fleet/roster.yaml`, `agents/`).
-  Planners run on socket `default`; the roster declares `mosaic-fleet`. This is the exact
-  "one roster-owned socket/host + quarantine unmanaged + stale GC" failure P-FLEET-001 indicts —
-  observed on the remediation mission's own fleet. Prerequisite for INBOX identity-addressing.
-- **D-4 / P-LIFECYCLE + hygiene — a dispatched agent silently IGNORED an in-message context reset.**
-  planner-sol was at 64.3%/372k; the brief asked it to reset first; it began work on dirty context anyway.
-  Only an out-of-band `/new` driven by the orchestrator guaranteed clean state. Confirms the postmortem
-  thesis: **instructions are not enforcement.** Reset must be a mechanical pre-dispatch step, not a request.
+> Newest first. Oldest entries roll to `BOARD-LEDGER.md` via `board-roll.sh` when this file
+> exceeds its 8 KB cap. Keystone detail is duplicated in `TASKS.md` §1a, so rolling loses nothing.
 
-- **D-6 / P-QUEUE-001 — the mandated queue guard returned PASS on an UNKNOWN state, live, today.**
-  Running the required `ci-queue-wait.sh --purpose push` before pushing produced
-  `state=unknown ... exit 0` — the exact defect at `ci-queue-wait.sh:282-288` that PR #1023 is parked
-  on. It also evaluated `branch=main` rather than the branch being pushed. The mission's own required
-  pre-push gate passed me on an indeterminate result. Third independent live instance of the class.
-- **D-5 / P-QUEUE-001 + P-CONFORMANCE-001 — KEYSTONE: an inert gate that erased its own evidence.**
-  Merged PR #868 (`b79336a8`) shipped a file that FAILS `pnpm format:check` ⇒ the CI format gate did
-  not block. An unrelated later PR (#872) then reformatted that file via its own `lint-staged`, so
-  `main` went green again and nobody learned the gate had failed to fire. Verified blob-level under the
-  repo's own config. **Detection must be per-merge-commit against that commit's own tree** — a "is main
-  green today" check reports all-clear on this exact defect. Binding on RM-02/RM-55. Full chain in
-  `TASKS.md` §1a. NOT quiet-patched, by Mos's ruling: patching the symptom destroys the signal.
+<!-- BOARD-ROLL:START -->
+
+### **D-8 / P-CONFORMANCE-001 — a PRE-REGISTERED acceptance check that was not runnable as written.**
+
+PR #1025 AC2's fixture `mkdir -p apps/*/venv/lib` creates a literal `apps/*/venv/lib` dir when the glob is unmatched — it did not test what it claimed. rev-974 ran it exactly as written, caught it, re-ran the intended assertion at an explicit path, and **disclosed** rather than silently substituting a working fixture and reporting PASS. **Pre-registration protects a check from being retrofitted to the implementation; it does not make the check correct.** An unverified gate appeared inside the mechanism built to catch unverified gates. Hard requirement on RM-02: the registry must self-verify that every registered case runs AND can fail — presence is not evidence.
+
+### **D-7 / P-FLEET-001 — stale-GC-on-disk: shared 30G /tmp hit 100% ENOSPC, degrading two seats.**
+
+~5.2G was session scratch dead 8-9 days (this session's own footprint: 88K). Same missing capability as orphaned-tmux-session GC, applied to disk — not a quota or discipline problem. Resolved manually by Mos (lead coordinator) after independent verification; `/tmp` now 79%. **The gap IS the finding:** the authority to reap exists, the deterministic reaper does not. Folded into RM-50 with explicit requirements (mechanical liveness, age threshold, dry-run, audit event per reap — never a heuristic sweep). Refusing to unilaterally delete another session's scratch was correct doctrine; the fix is a reaper, not braver agents.
+
+### **D-6 / P-QUEUE-001 — the mandated queue guard returned PASS on an UNKNOWN state, live, today.**
+
+Running the required `ci-queue-wait.sh --purpose push` before pushing produced `state=unknown ... exit 0` — the exact defect at `ci-queue-wait.sh:282-288` that PR #1023 is parked on. It also evaluated `branch=main` rather than the branch being pushed. The mission's own required pre-push gate passed me on an indeterminate result. Third independent live instance of the class.
+
+### **D-5 / P-QUEUE-001 + P-CONFORMANCE-001 — KEYSTONE: an inert gate that erased its own evidence.**
+
+Merged PR #868 (`b79336a8`) shipped a file that FAILS `pnpm format:check` ⇒ the CI format gate did not block. An unrelated later PR (#872) then reformatted that file via its own `lint-staged`, so `main` went green again and nobody learned the gate had failed to fire. Verified blob-level under the repo's own config. **Detection must be per-merge-commit against that commit's own tree** — a "is main green today" check reports all-clear on this exact defect. Binding on RM-02/RM-55. Full chain in `TASKS.md` §1a. NOT quiet-patched, by Mos's ruling: patching the symptom destroys the signal.
+
+### **D-4 / P-LIFECYCLE + hygiene — a dispatched agent silently IGNORED an in-message context reset.**
+
+planner-sol was at 64.3%/372k; the brief asked it to reset first; it began work on dirty context anyway. Only an out-of-band `/new` driven by the orchestrator guaranteed clean state. Confirms the postmortem thesis: **instructions are not enforcement.** Reset must be a mechanical pre-dispatch step, not a request.
+
+<!-- BOARD-ROLL:END -->
 
 ## Decisions log
 

docs/remediation/TASKS.md

@@ -4,8 +4,8 @@
 **Sources:** [`DECOMP-OPUS.md`](./DECOMP-OPUS.md) (robustness, 38 tasks / 8 dissents) and
 [`DECOMP-SOL.md`](./DECOMP-SOL.md) (pragmatic, 25 tasks / 10 defers / 7 dissents), produced
 **independently** — neither planner read the other. Charter: [`MISSION.md`](./MISSION.md).
-**Status:** PLANNING — this backlog is proposed, not yet dispatched. Three items need a Mos/Jason
-ruling before the affected tasks dispatch (§5).
+**Status:** EXECUTING — all three blocking decisions RULED by Mos on 2026-07-31 (§5). **RM-01 is
+dispatched.** RM-03 is held pending Jason's disposition of PR #1023; nothing else is blocked.
 
 > **Provenance of the inputs (both clean).** `planner-opus` ran in a fresh session throughout.
 > `planner-sol` initially began work at 64.3% dirty context despite a brief instructing it to reset;
@@ -40,7 +40,10 @@ point. Both planners independently rejected it on the same evidence: that contro
 point into a disabled rail produces **a stranded executor — the identical built-but-unwired disease,
 one layer up, that would look "done" in a PR.** The live paths are
 `packages/mosaic/src/commands/launch.ts` and `packages/coord/src/runner.ts`.
-This contradicts the charter and is escalated as **DECISION-1** (§5).
+This contradicted the charter and was escalated as DECISION-1 — **now RULED in the planners' favour by
+Mos (§5)**. The corrected target is a new production Node `TaskExecutor` on the live dispatch path
+(`packages/mosaic` launch + `packages/coord`) that Coord/Forge/live dispatch submit through; the
+Python rail is deleted, not ported.
 
 ---
 
@@ -66,6 +69,115 @@ side effect, so `main` went green again **without anyone ever learning the gate
 > present-tense framing was wrong. The hygiene PR therefore carries the `.prettierignore` fix only —
 > the README needs no fix today.
 
+### Third live instance, same class — the queue guard, hit by this orchestrator
+
+Running the **mandated** pre-push guard during TASK-0:
+
+```
+$ ~/.config/mosaic/tools/git/ci-queue-wait.sh --purpose push
+[ci-queue-wait] platform=gitea purpose=push branch=main sha=06e0d403…
+[ci-queue-wait] state=unknown purpose=push branch=main
+$ echo $?   →  0
+```
+
+**Two distinct defects in one tool**, both feeding RM-03:
+
+1. **Wrong exit** — `state=unknown` ⇒ `exit 0`. The defect at `ci-queue-wait.sh:282-288` that OPUS
+   documented and that PR #1023 is parked on. A required gate returned PASS on an indeterminate result.
+2. **Wrong branch** — it evaluated `branch=main`, not the branch actually being pushed. Even a
+   correctly-exiting guard would have been answering the wrong question.
+
+**Standing doctrine (Mos):** until RM-03 lands, a green from this guard carries **zero information**
+and must not be cited as merge evidence. Rely on reviewer clearance + real CI.
+
+Three independent live instances in a single session — format gate, agent context reset, queue guard —
+is the class confirmed, not anecdote.
+
+### D-8 — a PRE-REGISTERED acceptance check that was not runnable as written
+
+On PR #1025 the author (me) pre-registered AC2 with the fixture snippet `mkdir -p apps/*/venv/lib`.
+In bash, when no `venv` exists the glob is unmatched and passes through literally, creating a
+directory named `apps/*/venv/lib` rather than one per workspace. The check as written did not test
+what it claimed to test.
+
+`rev-974` ran it **exactly as written**, observed the wrong behaviour, then re-ran the intended
+assertion at an explicit path — **and said so in the review** rather than silently substituting a
+working fixture and reporting PASS.
+
+Two things this establishes:
+
+1. **The instruction "do not adjust a check to fit the diff; if it is unrunnable, say so explicitly"
+   worked.** A silent substitution here would have produced a green AC2 that proved nothing, on the
+   exact task whose subject is gates that appear to work. The disclosure is what made the PASS
+   meaningful.
+2. **Pre-registration does not confer correctness.** A pre-registered check is protected from being
+   retrofitted to the implementation; it is not protected from being _wrong when written_. This is a
+   small instance of the mission's own class — an unverified gate — occurring inside the mechanism
+   built to catch unverified gates.
+
+**Requirement on RM-02 (non-negotiable, sharpened by Mos).** The registry must **self-verify** that
+every registered case demonstrably **runs** and demonstrably **fails on a known-bad input**.
+Presence in the registry is **not** evidence. **A check is not trusted until it has been shown to
+fail.** This is mutation testing / negative control applied _at the registry level_ — meaning
+**the conformance harness must itself be conformance-tested.** A registered case that cannot fail, or
+cannot run, is exactly as inert as an unregistered one, and the registry check must detect that
+itself rather than assume it.
+
+**Requirement on RM-55.** The same recursion applies to the harness: it must be observed red before
+its green is worth anything (OPUS R-063 AC1 already states this; D-8 is the empirical case for it).
+
+**Second, equally load-bearing lesson — reviewer disclosure is what makes a review trustworthy.**
+rev-974 could have silently swapped in a working fixture and reported `AC2 PASS`. Nothing in the
+process would have caught it, and the resulting green would have certified nothing — on the very task
+whose subject is gates that only appear to work. The brief's instruction — _"do not adjust a check to
+fit the diff; if it is genuinely unrunnable as specified, say so explicitly and explain why rather
+than silently substituting your own"_ — is therefore not boilerplate. It is the clause that makes a
+PASS mean something, and it must appear in **every** reviewer brief this mission issues.
+
+### D-7 — shared-tmpfs contention → cascading ENOSPC (live incident, 2026-07-31)
+
+The shared 30 G `/tmp` hit **100% ENOSPC** mid-session. It broke tool calls in **two different seats**
+(mine and Mos's) — a single full disk degrades every agent on the host at once. Recurring: prior
+incidents 2026-06-18 and 2026-07-17.
+
+Attribution matters, because the wrong owner cleans the wrong thing. Measured:
+
+| path                                           | size      | last modified                | owner                                             |
+| ---------------------------------------------- | --------- | ---------------------------- | ------------------------------------------------- |
+| `…/-src-mosaic-stack/6d2faee6…` (this session) | **88 K**  | live                         | mos-remediation                                   |
+| `…/-src-mosaic-stack/c743185d…`                | **3.6 G** | **2026-07-22** (9 days dead) | abandoned session, same project path              |
+| `…/claude-1001/pnpm-store`                     | **1.6 G** | **2026-07-23** (8 days dead) | abandoned; the live store is correctly on `$HOME` |
+
+So ~5.2 G — the bulk of the pressure — is **dead session scratch that nothing will ever read again**.
+This is not a quota problem; it is **P-FLEET-001's stale-session GC, applied to disk instead of tmux
+sessions.** The same missing capability (nothing owns reaping dead ephemeral state) produces both the
+orphaned-session failure and this one. Reaping dead-session scratch belongs in RM-50 alongside stale
+tmux-session GC.
+
+**Added to RM-01 as acceptance criteria:** heavy build artifacts (node_modules, package stores, build
+output) must land on the main disk in the worktree, never on the shared 30 G `/tmp`.
+
+**Resolution, and the part that is actually the finding.** Mos verified the attribution independently
+(mtimes, no process or `lsof` holding either path, no live session maps) and reaped both as lead
+coordinator: `/tmp` went to 79%, 6.0 G free. But note _how_ it was resolved — **a human-authority seat
+did it by hand, because the authority exists and the reaper does not.** That gap is the finding, not
+the disk usage.
+
+Two doctrine points fall out, both binding on RM-50:
+
+1. **The fix is not "agents should tidy up."** Asking each seat to clean its own scratch is
+   `instructions are not enforcement` (D-4) wearing a different hat. A deterministic reaper must own
+   it — same conclusion the north star reaches for every other class in this mission.
+2. **Refusing to unilaterally delete another session's scratch was correct, and the resolution is not
+   "be braver about deleting."** An agent guessing that someone else's state is garbage is exactly the
+   unreviewed destructive act the Constitution forbids. The resolution is that _ownership and liveness
+   become mechanically decidable_, so reaping is a determination rather than a judgement call.
+
+**Reaper requirements for RM-50:** liveness determined mechanically (process/`lsof`/session-map, not
+mtime alone); an age threshold; a dry-run that reports what it would reap and why; and an audit event
+per reap. Never a heuristic sweep — that would reintroduce the P-WORKFLOW-001 auto-sync failure in a
+more destructive form.
+
 **The self-erasure is the important part.** An inert gate that is masked by unrelated downstream
 commits produces no lasting artifact, which is precisely why this class survives for months. Detection
 cannot rely on "is `main` currently red" — it must be per-merge-commit.
@@ -112,13 +224,13 @@ spread is itself information, and X1 says we calibrate on real merged PRs.
 
 ⛔ _No gate-introducing task in any later phase may merge before RM-02._
 
-| id    | task                                                                                         | src | depends_on   | est (S/O)        | tier   |
-| ----- | -------------------------------------------------------------------------------------------- | --- | ------------ | ---------------- | ------ |
-| RM-01 | Reproducible non-root checkout; pre-push gate fails on **code, not env** (banks D-1/D-2/D-5) | O+S | —            | 6K / 60K         | codex  |
-| RM-02 | **Gate registry + negative-control CI check** (anti-inert-gate harness) ★keystone            | O   | RM-01        | — / 120K         | opus   |
-| RM-03 | Queue-guard fail-closed rework (`unknown`/`no-status`/malformed ⇒ ≠0)                        | O+S | RM-02        | 8K / 100K        | sonnet |
-| RM-04 | Activation/version coherence; block launch on skew, fail SAFE; honest `doctor` labels        | O+S | RM-01        | (in S-01) / 140K | sonnet |
-| RM-05 | Break-glass replaces the three silent `MOSAIC BYPASS` fail-opens                             | O   | RM-04, RM-02 | — / 120K         | opus   |
+| id              | task                                                                                                                                          | src      | depends_on   | est (S/O)        | tier   |
+| --------------- | --------------------------------------------------------------------------------------------------------------------------------------------- | -------- | ------------ | ---------------- | ------ |
+| RM-01           | Reproducible non-root checkout; gate fails on **code, not env**; heavy artifacts OFF shared `/tmp` (banks D-1/D-2/D-5/D-7)                    | O+S+live | —            | 6K / 60K         | codex  |
+| RM-02           | **Gate registry + negative-control CI check** (anti-inert-gate harness) ★keystone                                                             | O        | RM-01        | — / 120K         | opus   |
+| RM-03 ⏸**HOLD** | Queue-guard: **two** defects — (a) `unknown`/`no-status`/malformed ⇒ ≠0, (b) guard evaluates `branch=main` instead of the branch being pushed | O+S+live | RM-02        | 8K / 100K        | sonnet |
+| RM-04           | Activation/version coherence; block launch on skew, fail SAFE; honest `doctor` labels                                                         | O+S      | RM-01        | (in S-01) / 140K | sonnet |
+| RM-05           | Break-glass replaces the three silent `MOSAIC BYPASS` fail-opens                                                                              | O        | RM-04, RM-02 | — / 120K         | opus   |
 
 > ⚠ **RM-05 must not merge before RM-04.** The bypasses exist because the lease-broker daemon was
 > never _deployed_ on this host — removing the fail-open before deployment coherence is real
@@ -187,7 +299,7 @@ spread is itself information, and X1 says we calibrate on real merged PRs.
 
 | id    | task                                                                                                                                                 | src                   | depends_on                 | est (S/O)        | tier   |
 | ----- | ---------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------- | -------------------------- | ---------------- | ------ |
-| RM-50 | One roster-owned socket/host; quarantine unmanaged; stale-session GC                                                                                 | O+S                   | RM-04                      | 14K / 150K       | sonnet |
+| RM-50 | One roster-owned socket/host; quarantine unmanaged; **deterministic reaper for stale sessions AND dead-session disk scratch** (D-7)                  | O+S+live              | RM-04                      | 14K / 150K       | sonnet |
 | RM-51 | Auto-sync **allowlist** (never auto-stage unknown paths) + worktree/lease isolation                                                                  | O+S                   | RM-02                      | 8K / 110K        | sonnet |
 | RM-52 | Retire the Python controller + duplicate MACP islands (3 → 1)                                                                                        | O+S                   | RM-26, RM-27, RM-25, RM-28 | 14K / 110K       | codex  |
 | RM-53 | Flat-file orchestration → DB hard cutover, with rehearsed rollback artifact                                                                          | O+S                   | RM-27, RM-30, RM-34, RM-29 | (in S-10) / 200K | opus   |
@@ -219,40 +331,49 @@ spread is itself information, and X1 says we calibrate on real merged PRs.
 
 ---
 
-## 5. Blocking decisions (need Mos, or Jason via Mos)
+## 5. Decisions — all three ruled by Mos, 2026-07-31
 
-These are escalated because they change the charter, the accepted directive, or another lane's
-ownership — none is a question I should answer unilaterally.
+**DECISION-1 — the wire-in point. ✅ RULED: accept the planners (Mos, 2026-07-31).**
+The charter's `mosaic_orchestrator.py::run_single_task` target is the **disabled Python controller
+this mission retires**; wiring the new choke point into the rail we are deleting is wrong.
 
-**DECISION-1 — the wire-in point (changes `MISSION.md`).**
-Both planners independently reject wiring the choke point into
-`mosaic_orchestrator.py::run_single_task`, because that controller is disabled and references a
-non-existent dispatcher. They propose wiring `packages/coord/src/runner.ts` +
-`packages/mosaic/src/commands/launch.ts` and **deleting** the Python rail instead. This makes RM-52 a
-deletion task rather than an integration task, and moves Build 1's acceptance onto a live
-`mosaic yolo` invocation. _My recommendation: accept — wiring a disabled rail reproduces the exact
-disease this mission exists to cure._
+> **Corrected target (authoritative):** a **new production Node `TaskExecutor`** sitting on the
+> **live dispatch path** — `packages/mosaic` launch + `packages/coord` — which Coord, Forge, and live
+> dispatch all **submit through**. This is the MACP scout's _full_ recommendation ("replace the block
+> **with** a Node executor **and** make Coord/Forge submit through it"), not a resurrection of the
+> Python controller. RM-52 is therefore a **deletion** task, and Build 1's acceptance is measured on a
+> live `mosaic yolo` invocation.
 
-**DECISION-2 — rollback artifact + the availability trade (needs Jason).**
-(a) Does "hard cutover, no flat-file interim" permit a **rehearsed, one-directional, read-as-authority-
-by-nobody** rollback snapshot (OPUS D3)? (b) Do we pre-commit in writing that "no DB ⇒ the fleet
-stops" and "unpersistable event ⇒ the operation fails" (OPUS D8)? That is a real availability
-regression versus today's limping flat-file fleet — correct for a system whose defining failure is
-_silent continuation_, but it should be a decision, not a 2am discovery.
-_My recommendation: yes to both; a rollback snapshot nothing reads is not an interim tracking system._
+Mos ruled this resolvable from the already-accepted retire-the-Python-rail decision — his authority,
+not a Jason escalation. RM-21/RM-26/RM-27/RM-52 all take the corrected target.
 
-**DECISION-3 — RM-03 ownership vs. parked PR #1023 (needs Mos).**
-P-QUEUE-001 is absorbed into this mission, but PR #1023 is explicitly parked under Mos. Two lanes can
-legitimately claim it. A third recursion on the gate-6 defect — performed by the remediation itself —
-would be the postmortem's own anti-pattern. _Not dispatching RM-03 until Mos rules._
+**DECISION-2 — rollback artifact + availability trade. ⏸ JASON-PENDING — NOT BLOCKING.**
+The DB build is phases away, so this is queued for Jason's next session rather than escalated now.
+**Binding requirement in the meantime (Mos, from P-RECOVERY-001):** the DB spine **must NOT be a
+single-point hard-stop.** Design for a broker-independent / degraded mode **plus** a rollback
+artifact. Jason finalises only the specific availability target. This reverses my earlier reading of
+OPUS D8 ("the fallback is: the fleet stops") — that answer is **not** pre-committed; a degraded mode
+is now a design requirement on RM-12, RM-13, RM-23, RM-36 and RM-53.
+
+**DECISION-3 — RM-03 vs. parked PR #1023. ✅ RULED: HOLD RM-03 (Mos, 2026-07-31).**
+Do **not** open a third gate-6 lane — that is the postmortem's own anti-pattern performed by the
+remediation. PR #1023 sits in Jason's **parked delivery stack**; its disposition (close, or supersede
+by RM-03) is Jason's at his next session.
+
+- **PR #1023 → `SUPERSEDED-PENDING-JASON`.** RM-03 stays `HOLD`; when Jason rules, RM-03 proceeds as
+  the single correct lane.
+- **RM-02 and RM-55 proceed independently and are NOT held.** The per-merge-commit gate-assertion
+  requirement is the _conformance_ capability, not the gate-6 fix itself — different scope, no
+  ownership collision.
 
 ---
 
 ## 6. Status
 
-| phase              | state                                                                                |
-| ------------------ | ------------------------------------------------------------------------------------ |
-| Decomposition      | DONE — both planners delivered independently                                         |
-| Reconciliation     | DONE — this document                                                                 |
-| Blocking decisions | **OPEN — 3 escalated to Mos (§5)**                                                   |
-| Dispatch           | NOT STARTED — RM-01 is dispatchable now; it depends on nothing and blocks everything |
+| phase              | state                                                                                                        |
+| ------------------ | ------------------------------------------------------------------------------------------------------------ |
+| Decomposition      | DONE — both planners delivered independently                                                                 |
+| Reconciliation     | DONE — this document                                                                                         |
+| Blocking decisions | **RULED** — all 3 closed by Mos 2026-07-31 (§5); D-2's availability target is Jason-pending but non-blocking |
+| Dispatch           | **RM-01 IN FLIGHT** — f10-coder (codex), worktree-isolated, AC1–AC8 pre-registered                           |
+| Review             | PR #1025 with rev-974; ACs pre-registered 22:12:26Z before diff exposure                                     |