A run could post running progress/plan narration as issue comments, and a
review run surfaced its in-progress narration as the result instead of a
conclusion (MUL-3605).
Add one rule to the Output section's issue-task branch, in both the
legacy and slim briefs: post exactly one comment per run — the final
result, before the turn exits — and keep plans/progress in the agent's
own reasoning. The pre-existing "Final results MUST be delivered … a task
that finishes without a result comment is invisible" line already makes
the comment mandatory, and "state the outcome, not the process" already
rules out progress dumps, so no second rule is added.
Chat / quick-create / autopilot keep their own delivery channels. Adds a
regression test across both brief paths.
Co-authored-by: J <j@multica.ai>
Co-authored-by: multica-agent <github@multica.ai>