Limits
Stated limits are contracts: if you hit one, this is the behavior you’ll see.
| Limit | Value | Why |
|---|---|---|
| Slack file download | 20 MB per file | keeps fetches inside session-side timeouts |
| Slack message chunk | 40 K characters | Slack API ceiling, split automatically |
!resume picker |
8 sessions | a picker, not a search — older sessions remain resumable from the dashboard |
!catchup replay |
40 turns | bounded replay cost in busy threads |
| provider-switch bridge | ~12 K characters of transcript | enough context to continue, small enough to move providers quickly |
| checkpoint retention | 3 most recent turns | bounded storage per session with full resume fidelity |
| checkpoint bundle | warn at 512 MiB, fail at 2 GiB | large artifacts belong in git remotes, not session snapshots |
| fleet size | 10 (self-serve) | higher by arrangement |
Timeouts and capacity behavior (HTTP 529, the claim queue) live in the
lifecycle reference.
this page as markdown: /sessions/reference/limits.md· index for agents: /llms.txt