Extends the PreCompact hook with a sibling block that refreshes
.session-state.local.json's updated_at when status is in_progress or
partial. Per-project: runs after the existing progress.json mutation,
inside the same loop iteration.
Design:
- Only refreshes existing state files; creation is the writer's job
(ultraexecute Phase 8 / 2.55 / 4 + future helper command).
- Monotonic guard: only updated_at is touched. project, status,
next_session_brief_path, next_session_label remain owned by the writer.
- Skips status in {completed, failed, stopped} — the latter two are
operator-action-required and silently bumping updated_at would mask
alert state.
- Always exit 0; never blocks compaction.
[skip-docs] rationale: README + CLAUDE.md updates land in Step 11.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Three changes in one commit:
1. NEW lib/util/atomic-write.mjs — exports atomicWriteJson(path, obj),
the canonical tmp+rename pattern. Reused by pre-compact-flush.mjs and
(in subsequent steps) by the new session-state writer.
2. NEW tests/lib/atomic-write.test.mjs — 4 unit tests covering
round-trip, no-orphan-tmp, overwrite-atomic, pretty-print formatting.
3. REFACTOR hooks/scripts/pre-compact-flush.mjs — replace the inline
atomicWrite() with the imported atomicWriteJson(). Also fixes a
pre-existing syntax error (leading whitespace + stray --resume token
outside the comment block) that silently broke the hook from v3.1.0
onward — PreCompact runtime is fail-open and swallowed the error.
File reformatted with standard zero-indent JS.
163 → 167 tests, 0 fail.
Step 2 of /ultracontinue v3.3.0 (project 2026-05-01-ultracontinue).
