Previously the task logs endpoint only worked when the workspace was
running, leaving users unable to view task history after pausing.
This change adds snapshot retrieval with state-based branching: active
tasks fetch live logs from AgentAPI, paused/initializing/pending tasks
return stored snapshots (providing continuity during pause/resume), and
error/unknown states return HTTP 409 Conflict.
The response includes snapshot metadata (snapshot, snapshot_at) to
indicate whether logs are live or historical.
Closescoder/internal#1254
This change adds a POST /workspaceagents/me/tasks/{task}/log-snapshot
endpoint for agents to upload task conversation history during
workspace shutdown. This allows users to view task logs even when the
workspace is stopped.
The endpoint accepts agentapi format payloads (typically last 10
messages, max 64KB), wraps them in a format envelope, and upserts to the
task_snapshots table. Uses agent token auth and validates the task
belongs to the agent's workspace.
Closescoder/internal#1253
## Summary
Completes the Coder Tasks GA promotion by updating swagger tags and
regenerating API documentation and updating the frontend API structure.
## Related
Follows #20923 and #20921 which promoted Tasks from Beta/Experimental to
GA.
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🤖 This change was written by Claude Sonnet 4.5 Thinking using
[mux](https://github.com/coder/mux) and reviewed by a human 🏂
Mathias Fredriksson