From the combined Ornith guidance (§6). Each session runs in its own
process group and is stopped after SESSION_LIMIT_MIN minutes (default
90), killed by group so the cargo it started goes too, never with pkill
(titan has no `timeout`, so the limit is plain shell). A task that logs
`stopped` gets its own message with the row. Two guards for a trial run:
RESUME=1 resumes a session once when it leaves work uncommitted, and
SLOTS_URL stops a session when no llama slot has been busy for
IDLE_LIMIT_MIN minutes (default 10).
Tested against a stub opencode outside a throwaway repository: a clean
task, a stopped row, a wrong trailer, an uncommitted session with and
without RESUME, a hang past a 1-minute limit (its child process killed
with it), and a session with no busy slot for 1 minute.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
kyleandClaude Opus 5.5
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