feat(chat): add TTL to LangGraph Redis checkpoints#1582
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mrveiss merged 2 commits intoDev_new_guifrom Mar 12, 2026
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Checkpoint keys for idle sessions now auto-expire after 24 hours (configurable via AUTOBOT_REDIS_CHECKPOINT_TTL_MINUTES). Active sessions refresh TTL on every read, so only truly abandoned sessions are cleaned up. This prevents unbounded Redis memory growth from stale LangGraph checkpoint data.
✅ SSOT Configuration Compliance: Passing🎉 No hardcoded values detected that have SSOT config equivalents! |
RedisConfig has no host/port fields — the try block always raised AttributeError and fell through to the hardcoded fallback. Use ssot.vm.redis and ssot.port.redis (VMConfig/PortConfig) so the checkpointer actually reads from SSOT config, including the checkpoint_ttl_minutes added in #1481.
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Summary
checkpoint_ttl_minutesfield toRedisConfigin SSOT config (default: 1440 min / 24h, env:AUTOBOT_REDIS_CHECKPOINT_TTL_MINUTES)ttlconfig toAsyncRedisSaverconstructor withrefresh_on_read: Trueso active sessions keep refreshing, only idle sessions expire0to disable TTL (previous behavior)Test Plan
redis-cli TTL <key>shows countdown)AUTOBOT_REDIS_CHECKPOINT_TTL_MINUTES=60for 1h TTLAUTOBOT_REDIS_CHECKPOINT_TTL_MINUTES=0for no expiryCloses #1481
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