diff --git a/task-logs/weekly/2026-02-19T00-58-49Z__perf-optimization-agent__failed.md b/task-logs/weekly/2026-02-19T00-58-49Z__perf-optimization-agent__failed.md
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+---
+agent: perf-optimization-agent
+cadence: weekly
+platform: claude
+status: failed
+timestamp: "2026-02-19T00:58:49Z"
+failure_class: backend_unavailable
+failure_category: lock_backend_error
+---
+
+# Task Log — Failed
+
+## Reason
+
+Lock backend error
+
+## Detail
+
+Lock acquisition for `perf-optimization-agent` (weekly cadence) failed with exit code 2.
+All Nostr relays returned `permanent_validation_error`: "Received network error or non-101 status code."
+WebSocket connectivity to the relay pool is unavailable in this execution environment.
+
+No prompt was executed. `lock:complete` was NOT published.
+
+## Scheduler State
+
+- **Selected agent:** perf-optimization-agent
+- **Selection algorithm:**
+  - Roster source: `src/prompts/roster.json` (weekly key)
+  - Latest log file: `2026-02-18T19-54-03Z__perf-deepdive-agent__completed.md`
+  - Previous agent: `perf-deepdive-agent` (from filename convention, index 6)
+  - start_index: `(6 + 1) mod 21 = 7`
+  - Candidate at index 7: `perf-optimization-agent` — not in excluded set → selected
+- **Excluded set (from lock:check:weekly):** bug-reproducer-agent, changelog-agent, dead-code-agent, feature-proposer-agent, frontend-console-debug-agent, fuzz-agent, perf-deepdive-agent, test-coverage-agent, ui-ux-agent, weekly-synthesis-agent
+
+## Lock Failure Metadata
+
+- **lock_command:** `AGENT_PLATFORM=claude npm run lock:lock -- --agent perf-optimization-agent --cadence weekly`
+- **backend_category:** relay_publish_non_retryable
+- **lock_correlation_id:** c5e5d9fc-85f5-41ca-b4d2-3671f815d157
+- **lock_attempt_id:** 5403bebc-a9f5-4a30-a3dd-6df7af4ec213
+- **successCount:** 0 / 3
+- **requiredSuccesses:** 1
+- **relay_list:**
+  - wss://nos.lol (publish:primary, reason=permanent_validation_error)
+  - wss://relay.damus.io (publish:primary, reason=permanent_validation_error)
+  - wss://relay.primal.net (publish:primary, reason=permanent_validation_error)
+- **lock_stderr_excerpt:** "Failed relay publish quorum in publish phase: 0/3 successful (required=1, timeout=15000ms, attempts=4)"
+
+## Retry Guidance
+
+1. Verify relay connectivity: `npm run lock:health -- --cadence weekly`
+2. Retry lock acquisition: `AGENT_PLATFORM=claude npm run lock:lock -- --agent perf-optimization-agent --cadence weekly`
+3. If all relays remain unhealthy, consult `docs/agent-handoffs/incidents/` for relay remediation guidance.
+4. See incident runbook: `docs/agent-handoffs/learnings/2026-02-15-relay-health-preflight-job.md`
+
+## Prompt Not Executed
+
+The selected prompt `src/prompts/weekly/perf-optimization-agent.md` was NOT executed.