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a08445ad78
* fix(suggest-compact): clean up old counter temp files claude-tool-count-<sessionId> files were written into the OS temp dir on every hook run and never removed, accumulating one orphan per session indefinitely. Sweep stale counter files at the top of main() before opening the active counter. Retention is env-tunable via COMPACT_STATE_TTL_DAYS (default 14 days); invalid values fall back to the default. The active session's counter file is preserved unconditionally even if its mtime is past the cutoff. Failures during the sweep are swallowed to preserve the always-exit-0 hook contract. Adds 7 regression tests covering the sweep, env-var validation, and the always-exit-0 invariant under a populated temp dir. Fixes #2156 * fix(suggest-compact): preserve counter files at the TTL cutoff boundary The cleanup sweep used `mtimeMs > cutoffMs` to short-circuit, which matched files whose mtime sits exactly on the cutoff boundary and deleted them. The cleanupOldCounters docstring promises only files *older than* retentionDays are removed; a file at age == retentionDays is not older than retentionDays, so it must survive. Switch the comparison to `>=` so only strictly older files fall through to deletion. Add a regression test that pins boundary-aged files (mtimeMs sitting just past the projected cutoff) are preserved. Refs #2156