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gods-eye-view/src/tooling
Said TurkseverandClaude Opus 5.5 4d42516ffe Make changelog assembly recoverable after a partial write
`--write` wrote CHANGELOG.md and then removed fragments one by one, so a
failure after the write left surviving fragments that a rerun spliced in
a second time.

The write is now staged. The assembled file goes into
changelog.d/.assembling/, the fragments are renamed in beside it, and
renaming the assembled file over CHANGELOG.md is the single commit
point. A run that fails rolls itself back when it can; otherwise the next
`npm run changelog` reads the staging directory and either restores the
fragments (assembled file still staged) or deletes the leftovers (batch
landed). `--check` reports a staged batch instead of reporting past it.

A failure-injection test makes every filesystem call in a `--write` fail
in turn, both as a one-off error and as a crash with no in-process
rollback. It asserts the retry produces exactly the uninterrupted
CHANGELOG.md, with each entry once and an empty directory. The test
fails against the previous write-then-delete and against delete-first.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
2026-10-16 11:01:25 +01:00
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