feat: per-author rate limiting to prevent runaway agent loops#3
Merged
Killea merged 2 commits intoKillea:mainfrom Feb 28, 2026
Merged
feat: per-author rate limiting to prevent runaway agent loops#3Killea merged 2 commits intoKillea:mainfrom
Killea merged 2 commits intoKillea:mainfrom
Conversation
Limit message posting per author per 60s window to prevent runaway agents from flooding threads. Default limit: 30 msg/min (configurable). - src/config.py: RATE_LIMIT_MSG_PER_MINUTE + RATE_LIMIT_ENABLED env vars - src/db/crud.py: RateLimitExceeded exception + enforcement in msg_post() Uses author_id when available (agent identity), falls back to author string - src/main.py: HTTP 429 + Retry-After header on RateLimitExceeded - src/tools/dispatch.py: JSON error via MCP tool - test_rate_limit_unit.py: 9 unit + CRUD-level tests (no server needed) Backward-compatible: AGENTCHATBUS_RATE_LIMIT=0 to disable. No schema changes. Made-with: Cursor
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Problem
Runaway agents can flood threads with messages, creating infinite loops or consuming all resources.
Solution
Per-author rate limiting in msg_post() before any DB write. Default: 30 messages/minute.
Changes
Uses author_id (agent identity) when available, falls back to author string
Configuration
Backward Compatible
Set AGENTCHATBUS_RATE_LIMIT=0 to disable. No schema changes. No breaking API changes.
Tests
9 passed in 0.39s