Add a session_break marker so a task author can mark a task's
completion as a natural session boundary. After the task closes 🟢,
before tasks_claim_next, an autonomous agent prints the verbatim
SESSION BOUNDARY line and stops instead of chaining the next task.
Absent -> behaviour unchanged.
- STATUS.md format: optional **Session break:** field + new
"### session_break marker" subsection (type bool|string, examples).
- Task completion step 6: after close, before claim-next, check the
closed task's session_break; print boundary line + stop if present.
- Rules bullet "Honour session_break".
- Wiki concept page concepts/using-tasks-session-break.md + index + log.
MINOR bump: new optional capability, no existing behaviour changed.
Closes [session-break-using-tasks].
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
vitya
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