Fix race condition in cmdLock sort order

- Add deterministic tie-breaker (eventId) for lock events with identical timestamps in `src/lib.mjs`.
- Add regression tests in `test/lib.test.mjs` verifying win/loss conditions.
- Create weekly race condition report and run artifacts.
- Mark `race-condition-agent` task as completed.

Co-authored-by: PR0M3TH3AN <[email protected]>

src/context/CONTEXT_2026-02-15T15-22-42Z.md

@@ -0,0 +1,15 @@
+---
+agent: race-condition-agent
+cadence: weekly
+run-start: 2026-02-15T15:22:42Z
+prompt: src/prompts/weekly/race-condition-agent.md
+---
+Goal: Audit for race conditions and fix one.
+
+Scope:
+- Shared Client and Relay Pool (`src/lib.mjs`, `src/lock-ops.mjs`)
+- Lock acquisition logic
+
+Constraints:
+- Non-breaking changes
+- One fix per run

src/decisions/DECISIONS_2026-02-15T15-22-42Z.md

@@ -0,0 +1,8 @@
+---
+agent: race-condition-agent
+cadence: weekly
+run-start: 2026-02-15T15:22:42Z
+prompt: src/prompts/weekly/race-condition-agent.md
+---
+Decision: Use `eventId` (hex string) lexicographical sort as tie-breaker.
+Rationale: Event IDs are unique and random (SHA256). Sorting by ID ensures that all clients agree on the order of events with identical timestamps, preventing split-brain scenarios where multiple agents think they won the lock.

src/lib.mjs

@@ -292,7 +292,7 @@ export async function cmdLock(agent, cadence, dryRun = false, deps = {}) {
     const postLocks = await queryLocks(relays, cadence, dateStr, namespace);
     const racingLocks = postLocks
       .filter((l) => l.agent === agent)
-      .sort((a, b) => a.createdAt - b.createdAt);
+      .sort((a, b) => (a.createdAt - b.createdAt) || String(a.eventId).localeCompare(String(b.eventId)));
 
     if (racingLocks.length > 1 && racingLocks[0].eventId !== event.id) {
       const winner = racingLocks[0];

src/test_logs/TEST_LOG_2026-02-15T15-22-42Z.md

@@ -0,0 +1,64 @@
+---
+agent: race-condition-agent
+cadence: weekly
+run-start: 2026-02-15T15:22:42Z
+prompt: src/prompts/weekly/race-condition-agent.md
+---
+Command: node --test test/lib.test.mjs
+Result:
+TAP version 13
+# Subtest: src/lib.mjs
+    # Subtest: cmdCheck
+        # Subtest: returns correct structure with empty locks
+        ok 1 - returns correct structure with empty locks
+        # Subtest: identifies locked agents
+        ok 2 - identifies locked agents
+        # Subtest: excludes paused agents
+        ok 3 - excludes paused agents
+        # Subtest: identifies unknown locked agents
+        ok 4 - identifies unknown locked agents
+        1..4
+    ok 1 - cmdCheck
+    # Subtest: cmdLock
+        # Subtest: successfully locks an available agent
+        ok 1 - successfully locks an available agent
+        # Subtest: fails if agent is not in roster
+        ok 2 - fails if agent is not in roster
+        # Subtest: fails if agent is already locked
+        ok 3 - fails if agent is already locked
+        # Subtest: fails if agent is already completed
+        ok 4 - fails if agent is already completed
+        # Subtest: fails if race check is lost
+        ok 5 - fails if race check is lost
+        # Subtest: handles race condition with identical timestamps using eventId tie-breaker (we win)
+        ok 6 - handles race condition with identical timestamps using eventId tie-breaker (we win)
+        # Subtest: handles race condition with identical timestamps using eventId tie-breaker (we lose)
+        ok 7 - handles race condition with identical timestamps using eventId tie-breaker (we lose)
+        # Subtest: dry run does not publish
+        ok 8 - dry run does not publish
+        1..8
+    ok 2 - cmdLock
+    # Subtest: cmdList
+        # Subtest: lists active locks
+        ok 1 - lists active locks
+        # Subtest: warns about unknown agents
+        ok 2 - warns about unknown agents
+        # Subtest: handles no locks
+        ok 3 - handles no locks
+        1..3
+    ok 3 - cmdList
+    # Subtest: cmdComplete
+        # Subtest: successfully completes an active lock
+        ok 1 - successfully completes an active lock
+        # Subtest: fails if no active lock found
+        ok 2 - fails if no active lock found
+        # Subtest: detects already completed task
+        ok 3 - detects already completed task
+        1..3
+    ok 4 - cmdComplete
+    1..4
+ok 1 - src/lib.mjs
+1..1
+# tests 18
+# pass 18
+# not-passed 0

src/todo/TODO_2026-02-15T15-22-42Z.md

@@ -0,0 +1,17 @@
+---
+agent: race-condition-agent
+cadence: weekly
+run-start: 2026-02-15T15:22:42Z
+prompt: src/prompts/weekly/race-condition-agent.md
+---
+## Completed Tasks
+- [x] Audit lock logic.
+- [x] Implement fix in `src/lib.mjs`.
+- [x] Add regression test in `test/lib.test.mjs`.
+- [x] Verify tests pass.
+- [x] Create weekly report.
+- [x] Complete memory storage.
+
+## Pending Tasks
+- [ ] Verify artifacts.
+- [ ] Complete lock.