Summary

• When Discord sessions expire, the gateway gets stuck in an infinite resume loop (code 1005) because stale session state is never cleared
• Adds ResilientGatewayPlugin subclass with resetSession() to invalidate stale sessions when the HELLO timeout fires (30s with no HELLO)
• Reduces maxAttempts from 50 to 10 — 50 was ~25 minutes of pointless retrying

Test plan

• npm run build passes
• npx vitest run src/discord/monitor/provider.lifecycle.test.ts passes (3/3)
• Gateway restart: all Discord bots connect cleanly, no resume death spiral in logs

🤖 Generated with Claude Code

Greptile Summary

Fixes Discord gateway resume death spiral by adding session reset capability when connections stall. The PR introduces ResilientGatewayPlugin that can invalidate stale session state (sessionId, resumeGatewayUrl, sequence) when the HELLO timeout fires (30s), forcing a fresh IDENTIFY instead of repeatedly attempting to resume a dead session. Also reduces reconnection attempts from 50 to 10 to avoid ~25 minutes of pointless retries.

Changes:

• Created ResilientGatewayPlugin subclass with resetSession() method to clear session state
• Updated all gateway creation paths to use ResilientGatewayPlugin instead of base GatewayPlugin
• Added session reset logic in HELLO timeout handler before forcing reconnect
• Reduced maxAttempts from 50 to 10 for faster failure detection

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• The fix is well-scoped and addresses a clear issue (resume death spiral). The ResilientGatewayPlugin subclass cleanly extends existing functionality without breaking changes. The session reset logic is properly guarded with instanceof check. Tests pass and the implementation follows TypeScript best practices. Reducing maxAttempts from 50 to 10 is a sensible change that makes failures surface faster rather than hanging for 25+ minutes.
• No files require special attention

_{Last reviewed commit: b5566a2}

_{(4/5) You can add custom instructions or style guidelines for the agent here!}