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hyperframes/packages
Vance IngallsandClaude Fable 5 6172d79dc2 fix(cli): atomic config writes, gated trial warning, and write-failure signal
Five findings from a fifth (final scoped) max-effort review of the previous
commit, all local:

1. writeConfig now writes atomically (pid-suffixed temp file + renameSync —
   rename within one directory is atomic on POSIX). This closes the real
   hazard behind the review's torn-read finding: readConfig's corrupted-file
   catch RESETS the config to defaults (telemetry re-enabled, anonymousId
   rotated, trial fields wiped), so a concurrent reader catching a
   non-atomic write mid-flight would silently destroy the user's config —
   and the previous commit's per-render readConfigFresh() at the arm site
   multiplied exposure to exactly that window. Verified against a real
   filesystem, not just the mocked unit tests.

2. writeConfig now returns whether the write landed (errors still swallowed
   — telemetry must never break the CLI). persistDeParallelRouterTrialFired
   uses it to stop immediately on a genuine fs failure (retrying an
   unwritable file is pointless) and reserve its retries for actual
   concurrent clobbers, instead of 3 blind write attempts + 4 disk reads.

3. The persistence-failure console.warn is now !quiet-gated like every
   other trial message — a quiet/batch-json render on an unwritable
   ~/.hyperframes no longer emits unexpected stderr that CI wrappers
   asserting empty stderr would misread as a render failure. The in-process
   latch already guarantees the safety behavior whether or not the warning
   prints.

4. The arm site short-circuits on the in-process fired latch BEFORE the
   fresh config read — post-fired batch rows no longer pay a per-row config
   read + parse + shared-cache invalidation for an answer module state
   already knows.

5. Replaced the new `as T` assertions in render.test.ts's config-state
   factory with an explicitly typed vi.hoisted return (repo TypeScript
   convention: no `as T`).

config.test.ts: node:fs mock gains renameSync (faithful to the new atomic
write); new test covers the success/failure return and asserts no temp file
survives a write.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-10 14:51:11 -07:00
..
2026-07-09 12:01:33 -07:00
2026-07-09 12:01:33 -07:00
2026-07-09 12:01:33 -07:00
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