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Make the nine-line compact Controller Handoff the default end-of-task format; reserve the long Controller Handoff Summary for high-risk/complex tasks (merge/tag/release, failed validation, blocked gates, secrets/prod, complicated owner decisions, cross-repo state, or explicit owner request). Compact form is for controller-LLM readability, safety confirmations are never omitted, and PR bodies still carry full review detail. Updates SKILL.md §K, llm-workflow-runbooks.md, and the start-issue / review-pr templates. Documentation only. Refs #101. Closes #108. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>