Add acceptance runner adapter and persist mutation state

Add the persistent runner adapter for gherkin-mutator and commit the
differential/acceptance mutation manifests written by the approved tools
during the architect verification pass for the post-memo feature.

By architect.

acceptance/lib/runner-worker.js

@@ -0,0 +1,68 @@
+/*
+  Persistent runner adapter for the APS gherkin-mutator.
+
+  The mutator starts this process (once per worker) and sends mutation jobs
+  over newline-delimited JSON on stdin. Each job carries the path to a mutated
+  feature JSON IR; this worker evaluates it through the same acceptance runtime
+  and step handlers used by the normal acceptance pipeline and replies with the
+  runner outcome.
+
+  Protocol (mutator-spec.md):
+    request:  { "id", "feature_json", "generated_dir", "work_dir" }
+    response: { "id", "outcome", "output", "error", "duration" }
+      outcome: test_success | test_failure | infrastructure_error
+
+  test_failure (acceptance failed) -> mutation killed
+  test_success (acceptance passed) -> mutation survived
+*/
+
+'use strict'
+
+const readline = require('node:readline')
+const fs = require('node:fs')
+const { runFeature } = require('./runtime')
+
+const rl = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout,
+  terminal: false
+})
+
+rl.on('line', async (line) => {
+  const started = Date.now()
+  const respond = (payload) => {
+    process.stdout.write(`${JSON.stringify(payload)}\n`)
+  }
+
+  let job
+  try {
+    job = JSON.parse(line)
+  } catch (err) {
+    respond({ id: 'unknown', outcome: 'infrastructure_error', output: '', error: `bad job: ${err.message}`, duration: Date.now() - started })
+    return
+  }
+
+  try {
+    const ir = JSON.parse(fs.readFileSync(job.feature_json, 'utf8'))
+    const report = await runFeature(ir)
+    respond({
+      id: job.id,
+      outcome: report.failures === 0 ? 'test_success' : 'test_failure',
+      output: report.results.map((r) => `${r.status} ${r.name}`).join('\n'),
+      error: '',
+      duration: Date.now() - started
+    })
+  } catch (err) {
+    respond({
+      id: job.id,
+      outcome: 'infrastructure_error',
+      output: '',
+      error: err.message,
+      duration: Date.now() - started
+    })
+  }
+})
+
+rl.on('close', () => {
+  process.exit(0)
+})

docs/reviews/post-memo-summary.md

@@ -0,0 +1,66 @@
+# Architectural Review Summary — post-memo
+
+## Task and commits reviewed
+- Task: `post-memo`
+- Reviewed the merged branch ending at `8e2693ad08` (refactorer), which carried:
+  - `d071b21`/`c9556be` — specifier Post-a-Memo Gherkin spec + feature backlog
+  - `514298b` — coder implementation with acceptance pipeline
+  - `64a7f78` — refactorer merge of coder work
+  - `8e2693a` — refactorer memo-post complexity reduction
+- Merged into `swarmforge-architect` (fast-forward) and processed as a batch.
+
+## Architectural findings and fixes applied
+Reviewed UI/Core separation, dependency rule, information hiding/encapsulation, and
+local code quality.
+
+1. **Testable core behind small adapters (good).** `src/services/memo-post.js` is a
+   testable module free of UI/IO concerns. It injects `wallet` and `feed` adapters
+   (minimal-slp-wallet surface + feed reflection), so OP_RETURN/broadcast and UI
+   concerns stay outside the core. Environmentally unsuitable I/O is confined to
+   adapter boundaries. Dependency direction is inward.
+2. **Acceptance pipeline separation (good).** `acceptance/lib/{generate,runtime,handlers}`
+   are the project-specific components the APS spec prescribes. The feature is parsed
+   by the **APS-supplied Babashka `gherkin-parser`** (procured fresh from
+   github.com/unclebob/Acceptance-Pipeline-Specification on first use), not
+   reimplemented. `handlers.js` drives real core behavior through fake wallet/feed
+   adapters so the run is deterministic and offline.
+3. **Information hiding (good).** memo-post hides the Memo `0x6d02` prefix and
+   broadcast mechanics; handlers only assert observable outcomes (broadcast prefix,
+   feed reflection, empty/length rejection).
+4. **Fix applied — runner adapter added.** Built the project-specific persistent
+   runner adapter required by `gherkin-mutator` at
+   `acceptance/lib/runner-worker.js` (newline-delimited JSON protocol; evaluates each
+   mutated feature IR through the same runtime/handlers and reports
+   `test_failure|test_success|infrastructure_error`).
+5. **Manifests updated by tools (permitted).** The language mutation tool embedded
+   its differential footer manifest in `src/services/memo-post.js`; the APS mutator
+   wrote the acceptance-mutation scenario manifest into `specs/post-memo.feature`.
+   Both are normal tool output and were left for the tooling, not hand-edited.
+
+## Verification results
+- **Unit (`node --test`):** 7/7 pass (`memo-post.test.js`).
+- **Acceptance (normal):** all 6 scenario executions pass.
+- **Mutation (`mutate4javascript` differential, `--max-workers 8`):**
+  `memo-post.js` — **killed 7, survived 0, uncovered 0**. Full kill.
+- **DRY (`dry4javascript src`):** no duplicate candidates.
+- **Gherkin acceptance mutation (soft):** 6 discovered; **1 killed**, **5 survived**,
+  0 errors.
+  - Killed: the empty-memo boundary — dithering the `"  "` example makes the
+    validation branch fail the scenario, confirming the empty-rejection guardrail is
+    connected to the example data.
+  - Survived (documented equivalents): message-content dithers in the valid-memo
+    scenario and the over-long scenarios. The tests treat the message as opaque data
+    and assert the *same* (mutated) text is composed and reflected, so changing one
+    character leaves the exercised branch identical. These are acceptable equivalent
+    survivors, not missing guardrails.
+- **Property tests:** none present in this project.
+
+## Suite status
+- Unit + acceptance suites pass; mutation fully kills source-level mutants for the
+  testable core. Gherkin acceptance mutation has 5 documented-equivalent survivors.
+
+## Handoffs sent
+- `git_handoff` → coder, refactorer (priority `00`, task `post-memo`), to review the
+  architectural commit (runner adapter + tool manifests).
+
+By architect.

specs/post-memo.feature

@@ -1,3 +1,7 @@
+# acceptance-mutation-manifest-begin
+# {"version":1,"tested_at":"2026-08-25T23:22:59.013044939Z","feature_name":"Post a Memo","feature_path":"/home/trout/work/psf-memo-client/.worktrees/architect/specs/post-memo.feature","background_hash":"d7f1a31b7651301ec01bdea9c4c990f9a032ce179aa84f8d6a78595f8a476474","implementation_hash":"unknown","scenarios":[{"index":1,"name":"Post a Memo - 2 an empty memo is rejected","scenario_hash":"4e6fea6fa5adbf7fe0eefdd9bc21a7027fe7312d2937a4fd68f1a1eb68d33a8d","mutation_count":1,"result":{"Total":1,"Killed":1,"Survived":0,"Errors":0},"tested_at":"2026-08-25T23:22:52.631790256Z"}]}
+# acceptance-mutation-manifest-end
+
 # Scenarios: Post a Memo - 1, Post a Memo - 2, Post a Memo - 3
 Feature: Post a Memo
 

src/services/memo-post.js

@@ -97,3 +97,7 @@ MemoPost.MEMO_POST_PREFIX = MEMO_POST_PREFIX
 MemoPost.MAX_MEMO_CHARS = MAX_MEMO_CHARS
 
 module.exports = MemoPost
+
+// mutate4javascript-manifest-begin
+// {"version":1,"tested_at":"2026-08-25T23:18:27.154Z","module_hash":"139dec671f2f59aad3c83f5c225c1f8eb1f56e4f662f2b674d2f6db06bf4de8b","functions":[{"id":"func/MemoPost.constructor","name":"MemoPost.constructor","line":25,"end_line":28,"hash":"73596685cdf614a4aa3bb3ab2ee2eec1c080e41ef8c56053a521eb07ca5c7d48"},{"id":"func/MemoPost.validate","name":"MemoPost.validate","line":32,"end_line":42,"hash":"2e45fb32d480e36e04ac61c3fb414849d9daa640c5ac366ee1363be4c3903fd0"},{"id":"func/MemoPost.post","name":"MemoPost.post","line":46,"end_line":69,"hash":"6a817a7eceb24e9e4eb9689345ea3ef6456e8b872bff00a0587bddae8060ead2"},{"id":"func/MemoPost._throwIfInvalid","name":"MemoPost._throwIfInvalid","line":72,"end_line":82,"hash":"e01932c7c343519cc8dd52d3e29b695783c6cdb7e84368e193140827c26bb39c"},{"id":"func/MemoPost._reflectPost","name":"MemoPost._reflectPost","line":85,"end_line":93,"hash":"36e9b77ac19b8a0c598e02f438c3d2ac1f6b7495cf6e28d9546d064ce63f861a"}]}
+// mutate4javascript-manifest-end