decompose review-004 recorded findings: 15 disposition tasks + the review-004-fixes gate (sqlite seam panic-safety, watcher-death subscribe + initial-stat, bridge alignment, scheduler classification, substrate SAFETY delta; pg forwarder hardening + diagnosability, BIGINT stamp decision + fix, log-facade decision; core offset pin + Display forging, mem doc notes, pg identifier note, tokio dev-dep normalization) — taskgraph validate green (95)

tasks/docs-pg-identifier-truncation-note.md

@@ -0,0 +1,58 @@
+---
+id: docs-pg-identifier-truncation-note
+name: Document the pg identifier-truncation collision in the release text (review 004 item 13)
+status: pending
+depends_on: []
+scope: single
+risk: trivial
+impact: isolated
+level: implementation
+tags: [review-004-fixes, postgres-engine, docs]
+---
+
+## Description
+
+The pg identifier-truncation cross-channel collision, per
+`docs/reviews/004-pre-release-general-review.md` §"Findings recorded,
+not fixed" item 13: `LISTEN`/`UNLISTEN` interpolate the channel as a
+quoted identifier (truncated at 63 bytes server-side) while
+`pg_notify` carries it as a parameter — two distinct names sharing a
+63-byte prefix can silently collapse into one wake channel. Names are
+unbounded by the validation contract (the no-cap "length-independence"
+verdict is deliberate — do not change it; the honest cheap fix is the
+doc note the review prescribed).
+
+Land the note in `deployment.md` (the pg rows / wherever the matrix
+discusses naming or limits) and in `engine-postgres.md` if it has a
+wake-channel section. The note states the mechanism (63-byte
+identifier truncation; the `pg_notify` payload path unaffected) and
+the mitigation (keep mechanism names under the PG identifier limit).
+The deployment matrix is stable release text — a dated amendment
+annotation per the family's convention.
+
+## Acceptance Criteria
+
+- [ ] `deployment.md` carries the truncation-collision note with a
+      dated annotation (mechanism + mitigation, honestly worded)
+- [ ] `engine-postgres.md` carries it too if a wake-channel section
+      exists there (or the absence recorded in Notes)
+- [ ] The validation contract's no-cap verdict untouched
+- [ ] Doc gate green
+
+## References
+
+- docs/reviews/004-pre-release-general-review.md §"Findings recorded,
+  not fixed" item 13 (the finding, the "fold into whichever doc pass
+  runs next" disposition this task discharges)
+- docs/architecture/deployment.md, engine-postgres.md (the landing
+  sites)
+- alkstore-postgres/src/forwarder.rs (the LISTEN/UNLISTEN
+  interpolation sites, for the note's accuracy)
+
+## Notes
+
+> To be filled by implementation agent
+
+## Summary
+
+> To be filled on completion