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fix(#3780): serialize WINDOWS.md ledger mutations on a cross-process lock (#4681)

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* test(#3780): regression tests for parallel ledger-writer loss

* fix(#3780): serialize WINDOWS.md mutations on a cross-process ledger lock

* fix(#3780): keep the ledger-unavailable degrade contract intact under the lock wrapper

* chore(#3780): backfill changeset PR number (4681)

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Co-authored-by: sim <sim@local>
This commit is contained in:
Tom Boucher
2026-09-13 05:13:42 -04:00
committed by GitHub
parent ccb39aec15
commit 0763326ced
6 changed files with 511 additions and 58 deletions
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---
type: Fixed
pr: 4681
---
**Parallel ledger writers no longer silently lose windows entries** — two concurrent `gsd_run windows append` (or waive/fixed) invocations both reported success while one entry vanished from `WINDOWS.md`, false-greening the /gsd-ship gate; the mutating commands now serialize on a cross-process ledger lock and refuse with a typed `windows_ledger_lock` error only when a live writer holds it past the retry budget. (#3780)