Closes the remaining parallel-session-lock remarks on top of the keying fix
(7a469dc9), with NO weakening of same-worktree serialization:
- D: the block message now identifies the holder by its STABLE session_id and
marks the recorded pid as transient ("may change between attempts"). Chasing
the pid is what led to closing the wrong session. Decision logic is unchanged
(text only) — existing /pid N/ triage assertion still holds.
- B: pruneStaleLocks() best-effort deletes leaked lock files that are ALREADY
stale by the shared isStale() definition (now exported from the pure module —
single source of truth). Active within-TTL locks are never touched, so the
serialization guarantee is not weakened. Wired into the PreToolUse branch of
main(), wrapped so hygiene can never break the gate (fail-open).
- C (no code): release-on-SessionEnd needs only a settings.json registration
(owner action) — the existing !tool_name branch already releases. Documented
in the plan. Until then, leaked locks self-heal via B + the 5-min TTL takeover.
TDD: RED -> GREEN per behavior. tools-vitest 2014 passed / 2 skipped.
Backlog items B/C/D; plan docs/superpowers/plans/2026-05-31-discipline-guard-backlog.md.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Дмитрий
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