Files
msd-core/.changeset
Tom Boucher cdd78bd2aa fix(#670): self-healing recovery for installer-migration checksum drift (#675)
Editing the body of an already-released installer migration drifts its computed
checksum (it hashes plan.toString()). The integrity guard then hard-aborted
every prior install on upgrade with "applied migration checksum changed" — a
100% reproducible blocker (v1.3.0, all platforms).

Already-applied migrations are filtered out of `pending` and never re-run, so
a drifted checksum is functionally inert. ADR-0008 anticipates checksum-mismatch
state as something the install-state layer must handle gracefully (plan -> apply
-> recover/report), not abort on.

This supersedes the published-checksum allowlist merged in #674 (per-release
maintenance debt — every historical checksum hand-pinned, still throws for any
unregistered value) with a general, self-healing recovery:

- Replace the throwing guard with non-fatal `collectAppliedChecksumDrift`,
  surfaced on `plan.checksumDrift`.
- Reconcile drifted stored checksums durably on the next state write
  (`reconcileDriftedChecksums`), idempotently (no perpetual writes).
- Relocate the "shipped migration bodies are immutable" rule to a CI baseline
  test that locks every shipped migration's checksum and fails on body drift —
  where #615 should have been caught, instead of blocking users.

Removes #674's legacyChecksums field, per-migration checksum pins,
published-checksums.json fixture, and compat test.

Fixes #670

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-04 13:44:05 -04:00
..

Changeset Fragments

This directory holds per-PR CHANGELOG fragments. Every PR with user-facing changes drops one (or more) <random-name>.md files here describing its CHANGELOG entry. Fragments are consolidated into the top-level CHANGELOG.md at release time.

Why

Two PRs that both edit the ### Fixed block of CHANGELOG.md always conflict on merge — git can't pick a serialization order without human input. Two PRs that each add a fresh .changeset/<unique-name>.md never conflict because they don't share lines.

See #2975 for the full rationale.

Adding a fragment

node scripts/changeset/new.cjs \
  --type Fixed \
  --pr 1234 \
  --body "fix the thing — explain the user-visible change in one sentence"

This writes .changeset/<adjective>-<noun>-<noun>.md with frontmatter and a body. Three random words → concurrent PRs don't collide.

Format

---
type: Fixed
pr: 1234
---
**`/gsd-foo` no longer drops trailing slashes** — explain the user-visible change.

Allowed type: values follow Keep a Changelog: Added, Changed, Deprecated, Removed, Fixed, Security.

Opting out

PRs that legitimately have no user-facing impact can add the no-changelog label. CI honors it. When unsure, add the fragment.

At release time

node scripts/changeset/cli.cjs render --version vX.Y.Z --date YYYY-MM-DD

Reads every fragment, groups bullets by type:, replaces ## [Unreleased] with a new ## [vX.Y.Z] - YYYY-MM-DD block, opens a fresh ## [Unreleased] above, deletes consumed fragments. Idempotent.