ALEF-PAT-035

observable signature

{
  "log_regex": "auth:\\s*\\d{4,}ms@\\d+ms",
  "alt_regex": [
    "eventLoopUtilization=0\\.9\\d",
    "eventLoopDelayP99Ms=\\d{4,5}",
    "session-resource-loader:\\d{4,}ms",
    "handshake=pending[\\s\\S]{0,200}closed before connect",
    "code=1006[\\s\\S]{0,80}durationMs=\\d{1,3}\\b"
  ],
  "structural_signature": "single embedded_run > 30s where auth phase consumes >70% AND event_loop_utilization > 0.95 during same window AND >=3 ws 1006 closures within 60s",
  "compound_signal": "Pattern A (auth) + Pattern E (event loop pinned) co-occur because the sync auth IS the event loop blocker; isolated PAT-035 signature requires the AUTH ratio + the EL utilization in same window"
}

verified instances (1) — from the catalog

• 2026-05-19T05:30openclaw/openclaw-runtime#@Ilya0527

fix archetypes

• auth-cache-per-session-per-hostcost: small

  Move auth resolution from per-attempt-dispatch into a session-level cache keyed by (sessionId, hostId). TTL = min(token-validity, 1h). On cache miss, take a single auth attempt and broadcast to other in-flight attempts via a promise-of-token primitive (single-flight pattern). Expected effect: auth latency 37s → ~10ms on warm cache, eventLoopUtilization 0.991 → <0.4.

• auth-on-worker-threadcost: medium

  If sync auth must remain per-attempt for security reasons, dispatch it to a worker_threads pool so the main event loop is not blocked. Doesn't reduce wall time but unblocks WS handshakes during the auth window. WebSocket 1006 'closed before connect' would drop near-zero.

• lazy-response-cache-during-reconnectcost: tiny

  Before pushing any outbound response (Feishu reply, WS event, agent answer), check `auth.handshake.status === 'pending'` AND `ws.reconnectAttempts > 0`. If both true, BUFFER the response in a local cache keyed by (sessionId, responseId) and defer flush until handshake.status === 'connected' && ws.stable_for > 2s. Prevents the 'reply emitted to dead socket' tail. Operator directive r20260519-0530 — applies to ALL ALEF outbound agents too, not just openclaw fixes.

compounds with

• ALEF-PAT-014
• ALEF-PAT-005