Add the authoring side of the `session_break` marker whose consumer
side shipped in using-tasks v1.2.0. At delegation time the author can
now mark a task so that, after it closes, an autonomous runner pauses
instead of chaining the next task.
- Pre-flight gate 5->6 questions: new Q (item 5, after notify) —
"Session-break после этой задачи? (domain-switch / milestone /
heavy infra)". Yes -> set session_break in body; no -> omit
(default unchanged).
- Template trailer gains optional `[**session_break:** true |
"<hint>"]` with inline comment (same lowercase frontmatter key
using-tasks reads).
- Usage-guidance block: three set-it cases + tie to using-tasks
Task-completion step 6 / SESSION BOUNDARY line.
- What-NOT-to-do bullet: don't set it routinely (real-boundary
marker, not a default).
- Wiki concept page concepts/delegate-task-session-break.md
(links using-tasks-session-break) + index + log.
PATCH bump: additive optional field + one pre-flight question, no
existing behaviour changed. Markdown policy artifact — no test
surface (TDD N/A). Closes [session-break-delegate-task].
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>