docs: fix re-review findings — seat-migration obligation, evidence rule moved into the standard, first-cut family settled

Restore the ReactNode seats' pending-migration obligation the earlier
rewrite had flipped into a permanent exception; state the merged-PR/issue
evidence allowance in docs/AGENTS.md itself so the citations note defers
to the standard instead of overriding it; rewrite the one current-state
'first cut' fact and record the historical-stage-name exemption (with
indexical stamps still banned); pairs re-recorded.

.agents/notes/implemented/process/2026-08-09-committed-artifact-citations.md

@@ -12,11 +12,11 @@ Large design and review sessions leave working shorthand — decision ordinals,
 
 Durable prose — comments, JSDoc, docs, notes, test comments and titles — cites only committed artifacts, resolvable in-repo without grep archaeology:
 
-- Name the owning Agent Note (its path at least once per file, a searchable name inline), the doc page path, or a GitHub issue number. PR, commit, branch, and stack positions stay banned in docs and code per the documentation standard; issues are durable and citable, and Agent Notes may cite merged PRs as evidence anchors — the standard routes change stories to commits, PRs, Agent Notes, and postmortems, and a note is that home.
+- Name the owning Agent Note (its path at least once per file, a searchable name inline), the doc page path, or a GitHub issue number. PR, commit, branch, and stack positions stay banned in docs and code per the documentation standard; issues are durable and citable, and Agent Notes and postmortems may cite merged PRs and issues as evidence, per the [documentation standard](../../../../docs/AGENTS.md)'s change-story routing.
 - A design-session ordinal whose decision has a committed owner is replaced by the decision's name — the ordinal once logged as "decision 21" is now "the plain-text-reference decision", owned by the [web input-machine note](../architecture/2026-07-25-web-input-machine-and-slash-pipeline.md); the ordinal itself resolves nowhere in-repo and was dropped everywhere. An ordinal without an owner is deleted and its factual clause restated to stand alone.
 - Fixed regressions are pinned as present-tense counterfactuals ("without X, Y happens"; "a naive X would…"), never as repo history ("used to Y").
 - Implemented notes state shipped reality: a "deferred to a later PR" claim whose target shipped names the shipped note instead.
-- Recorded fixtures, snapshots, and archived notes are exempt: recorded model output and sealed history keep their original voice.
+- Recorded fixtures, snapshots, and archived notes are exempt: recorded model output and sealed history keep their original voice. Inside a note's change-story sections, a historical stage name ("the first cut shipped X") is current-state-safe; indexical stamps ("this cut") stay banned everywhere.
 
 One repo-wide purge applied these rules across the prose surfaces, including the generator-owned templates (`scripts/gen-doc-graphs.ts`, `scripts/gen-tool-catalog.ts`, the typert generator's page notice) with regeneration, the type-equiv source JSDoc with page re-pastes, and the bilingual counterparts with pair re-records.