pm-dispatch: make check-clause2-carriers C4 recognise the live contract-review verdict dialect, and name the session a reviewer writes (#17368)

* pm-dispatch: make `check-clause2-carriers` C4 read the live contract-review verdict dialect

C4 (the independence carrier) discriminated a verdict comment with
`VERDICT_MARKER` alone -- measured on the 2026-09-01 board, where a verdict
opened a fenced `VERDICT: PASS` block. Every verdict on the 2026-09-09 board is
written the other way: a `## Contract review` heading, the head as a code span,
`**Verdict: PASS WITH FINDINGS**` in bold. All four live specimens read `null`,
so C4 had no live population and `--pair` exit 0 said nothing about
independence for any pair reviewed in the current dialect.

Three halves, all measured offline against the live comment rows:

1. Recognition: `isVerdictComment` accepts EITHER the fenced marker OR H51's
   heading plus `contractReviewHeadMatch` against the pair's head -- both
   IMPORTED from `check-half-states.mjs`, the same two facts C6 already reuses,
   so the two rows cannot disagree about what a verdict looks like. No regex for
   the verdict WORD in either dialect.

2. Threads: C4 judges the card thread always and the PR thread when `gather`
   already holds it (COMPLETED pairs). Measured 2026-09-10: all four live
   verdicts sit on the PR thread and none of the three delivering cards carries
   a `## Contract review` heading at all, so a card-only C4 stays silent however
   good its discriminator is. A pending pair's PR-thread verdict is a declared
   limit, not a bought read.

3. Value decoration: the key regexes tolerate `**Implemented-by:**` -- the
   colon inside the bold -- but the value readers admitted a leading `**` only
   with no space after it, so `- **Implemented-by:** `+backticked token read as
   unreadable. Decoration is now stripped symmetrically; words are not, so
   `branch `+token and prose values stay refused.

`Reviewed-by:` still admits a session only (2026-09-02 reading a, unchanged).
The live prose values therefore read `malformed`, which is the true reading of a
verdict written without its reviewer's session; the remedy is on the writing
side, and `references/contract-review.md` :35-:37 now name it -- the seat that
renders or ADOPTS the verdict writes its own session, and an adoption record
already carries one.

Self-test: C4 battery 52 -> 89 cases (390 -> 396 total), fixtures taken from the
live bodies, one per dialect. The C6 reference record's `Implemented-by:` value
is corrected to put its token first after the colon: written `branch `+token it
reads `malformed` the moment C4 can see the dialect, which is a real carrier
defect and belongs on the defective specimen, never on the reference one.

Claude-Session: https://claude.ai/code/session_01YKEjmbYNvYWJvWGSWx26zK
Co-authored-by: Claude <noreply@anthropic.com>

* pm-dispatch: keep the contract-review tier's model id out of C4's fixtures

`dispatch-gates --self-test` holds the tier constant's VALUE to exactly one
spelling under `.claude/skills/pm-dispatch` + `scripts/pm` -- the maintainer's
own rule, 「needs:fable-review 这个标签不好,下次模型升级怎么办」. The C4
fixtures added for the 2026-09-09 dialect quoted the model id out of the live
bodies (five sites), which reds that case.

The fixtures carry the SHAPE, not the id: a `Reviewed-by:` value that is prose
with no session token is what the reader is being pinned on, and the model name
is decoration. Importing the constant was tried and rejected -- it makes
`check:pm-clause2-carriers` name a path while its own marker declares
no-path-population, which reds a different case in the same self-test.

Claude-Session: https://claude.ai/code/session_01YKEjmbYNvYWJvWGSWx26zK
Co-authored-by: Claude <noreply@anthropic.com>

---------

Co-authored-by: Claude <noreply@anthropic.com>

Author: os-litant

.claude/skills/pm-dispatch/references/contract-review.md

@@ -32,9 +32,9 @@
 - ③ 边界旗处置:dev 挂旗与 `open_questions` 逐旗答复或升级。
 - 独立性件,spec 席:契约判断真分叉或 dev 挂旗 ⇒ 起上下文隔离的达档复核子代理。
 - 只喂卡片、既有裁决与 PR 本体,⛔ 不喂派发令与派发席自己的结论;简报写成对抗性。
-- 裁决载独立性对(机读):产出 diff 的身份写 `Implemented-by:`,出裁决的席位写 `Reviewed-by:`。
-- `mode:subagent` dev 记其分支 `claude/issue-…`(子代理无自有 session);`mode:remote` dev 记 session id。
-- 两者同 session ⇒ 报 SELF-REVIEW,⛔ 不作独立复核;两行皆无的历史裁决恒静默。
+- 独立性对(机读):`Implemented-by:` 写产 diff 者身份;`mode:subagent` 记分支,`mode:remote` 记 session id。
+- `Reviewed-by:` 写渲染或采纳裁决的席位 session;隔离复核子代理无 session,记采纳它的席位。
+- 两者同 session ⇒ 报 SELF-REVIEW;值紧跟冒号,前置词即不可读;两行皆无的历史裁决恒静默。
 - 清标即落地:PASS ⇒ 同席同笔剥双载体;凡清标同笔留 provenance 评论,引记录 id 与所判 head。
 - 随后按 `landing-operations.md` 走落地前检 → 转 ready → 挂 auto-merge 或入队。
 - 轮次报告设复审清单专节,形状与代裁清单同为强制审计。