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ersatztv/docs/decisions/release-ci-governance.md
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feat(610): split the decision corpus into one YAML-frontmatter file per record
168 records -> docs/decisions/records/<area>/<topic>.md (163 active, 23 dirs) and
docs/decisions/archive/<area>/<topic>.md (5 archived). The filename IS the key,
so one-active-record-per-key becomes a filesystem property rather than a
validator check, and supersession becomes a `git mv`.

WHY: the monolith was a concurrency problem before an aesthetic one. A
3,900-line append target made parallel sessions collide -- PR #605 and PR #614
both hit append-vs-append conflicts during routine rebases, and hand-resolving
those inside the corpus is exactly the operation the rationale-rewrite guard
exists to police.

HOW IT IS VERIFIED: a ~170-file diff cannot be meaningfully read, so correctness
does not rest on reading it. The parser was taught BOTH formats first, so the
body-diff guard parses the old form at the merge-base and the new form at head --
the migration validates itself, no bypass. The proof is a field-level equivalence
harness: 168 records before and after, zero lost, zero gained, zero field
mismatches, zero rationale bodies differing. Reviewers should scrutinise the
harness; it is the actual evidence.

What measuring caught that reading would not have:

- ~500 lines sit OUTSIDE any record -- decisions.md's lifecycle schema and each
  topic file's preamble, mostly the only copy. Source files are kept and
  stripped, never deleted. They also cannot be filed per-area: topic files hold
  several areas and 4 of 23 areas span several files.
- Archive discovery was a non-recursive glob; after the split it found ZERO
  archived records, surfacing as four bogus "supersedes points to unknown key"
  errors rather than an obvious failure.
- ~32 live docs point into the corpus BY DATE, which the split dangles. Each
  stripped file now ends with a generated "Records formerly in this file" index,
  which also rescues the identical breadcrumbs in old issue comments.
- decisions.md's "In this file:" list was 97 same-file anchor bullets that the
  split makes WRONG, not merely stale. Dropped; the generated index replaces
  them with links that resolve.

The equivalence harness now runs against a checked-in FIXTURE, not the live
corpus. The earlier version migrated the real tree, which made it a one-shot:
the moment the migration landed there was nothing left to move and the tests
failed for reasons unrelated to the code. A fixture keeps them testing the
SCRIPT rather than the repo's current state.

Keys preserved verbatim, warts included: `sched` (12) and `scheduling` (1) remain
two directories for one concept. Renaming a key is not a move -- it changes
identity, breaks the equivalence proof, and invalidates MemPalace's per-key
drawers. Taxonomy normalisation is separate work.

refs #610
2026-07-25 19:45:09 +02:00

35 lines
3.2 KiB
Markdown

# Release, CI & merge-governance decisions (#303, #311, #314, #315, #335)
Why the merge/release process is enforced by hooks and CI gates rather than prose: the #303
methodology-hardening waves (state-derived merge-consent, API-contract CI gate, append-only
decisions log, review-verdict gate), formatting-as-you-touch + rebase discipline, the
auto-grant fix, migration rehearsal on a prod-DB copy, and release promotion. Rationale
relocated from the append-only `docs/decisions.md` at the v26.9.0 consolidation; operational
detail cross-links to `docs/ci-cd.md` and CLAUDE.md → Task Completion Protocol.
Issue trail: #303 (H4/H5 api-docs gate, H6 Done-when, H9 append-only (archived), H3 root-png
(active), H10 review-verdict), #311 (H11 formatting/rebase), #314 (merge-gate auto-grant), #315 (migration
rehearsal), #335 (release promotion). The whole hook program's throughline: make each process
rule a derivation/hook, not prose to remember (#303 methodology review).
## Contents
- **(archived 2026-07-21)** 2026-07-12 — decisions.md is append-only, enforced; root-screenshot guard (#303 H9/H3) — `docs.append-only-guard` is `status: superseded` by `docs.decision-lifecycle` (see `docs/decisions.md`); relocated to [`archive/release-ci-governance.md`](archive/release-ci-governance.md#2026-07-12--decisionsmd-is-append-only-enforced-root-screenshot-guard-303-h9h3) (heading kept identical to the pre-split original so the lifecycle validator's relocation check matches it by heading). The bundled companion root-screenshot guard (H3) was split out into its own active record, below.
---
## Records formerly in this file
Each record below moved to its own file under `records/` (ersatztv#610); the rationale is
unchanged. Resolve by **key** — that is the stable identity. A date-based pointer from
another doc or an old issue comment should land here and then follow the link.
- 2026-07-12 — Blocking CI gate for API-contract artifacts (#303 H4/H5) — [`release.api-contract-ci-gate`](records/release/api-contract-ci-gate.md)
- 2026-07-12 — Formatting-as-you-touch, enforced; rebase-not-merge for PR branches (#311 H11 + format CI) — [`release.format-as-you-touch-rebase`](records/release/format-as-you-touch-rebase.md)
- 2026-07-12 — Merge-consent derived from state via a `## Done-when` issue checklist (#303 H6) — [`release.done-when-merge-consent`](records/release/done-when-merge-consent.md)
- 2026-07-12 — Merge-consent gate auto-grants when satisfied (no redundant prompt); state IS the consent (#314) — [`release.merge-consent-autogrant`](records/release/merge-consent-autogrant.md)
- 2026-07-12 — Release path rehearses migrations on a prod-DB copy before promoting (#315) — [`release.migration-rehearsal-prodcopy`](records/release/migration-rehearsal-prodcopy.md)
- 2026-07-12 — Review-verdict merge-gate: latest commit must be reviewed (#303 H10) — [`release.review-verdict-gate`](records/release/review-verdict-gate.md)
- 2026-07-12 — Root-screenshot guard: pre-commit refuses root-level *.png (#303 H3) — [`ci.root-screenshot-guard`](records/ci/root-screenshot-guard.md)
- 2026-07-13 — Release promotion: floating `:prod`, exact-image scan before manual deploy (#335) — [`release.promotion-floating-prod`](records/release/promotion-floating-prod.md)