docs: compact Controller Handoff as default format (#108)

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>

skills/llm-project-workflow/SKILL.md

@@ -48,7 +48,7 @@ Additional issue-first rules:
   the existing one. Design debates belong on the issue, where other LLMs
   comment directly. Discussion-only tasks must **not** create branches or PRs;
   their comments should include recommendations, risks, open questions, and a
-  Controller Handoff Summary (§K).
+  Controller Handoff (§K; compact format unless high-risk).
 - **If the repo/tracker home for the work is unclear, stop and ask for an
   owner decision.** Do not create a new repository or a new tracker unless
   explicitly approved by the owner.
@@ -247,16 +247,42 @@ Ready-to-copy templates live in [`templates/`](templates/):
 - [`worktree-cleanup.md`](templates/worktree-cleanup.md) — clean up after merge.
 - [`release-tag.md`](templates/release-tag.md) — create a release tag.
 
-## K. Controller Handoff Summary (required, every task)
+## K. Controller Handoff (required, every task)
 
-Every LLM task **must end with a `Controller Handoff Summary`** — whether the
+Every LLM task **must end with a `Controller Handoff`** — whether the
 task was implementation, review, merge, issue triage, documentation,
 discussion-only, or blocked planning. It lets a controller LLM understand the
 current state immediately, without rereading the conversation.
 
-Rules:
+**The compact format is the default.** It is written for controller-LLM
+readability, not as a full human status report. PR bodies still carry the
+full review detail — the handoff never replaces PR documentation.
 
-- Never omit the summary.
+Compact format (default):
+
+```md
+## Controller Handoff
+
+- Task:
+- Repo/state:
+- Issues/PRs:
+- Changed:
+- Validation:
+- Blockers:
+- Review:
+- Next:
+- Safety:
+```
+
+The `Safety:` line is never omitted; it is usually:
+
+```text
+no self-review; no self-merge; no tags; no secrets; no prod
+```
+
+Rules (both formats):
+
+- Never omit the handoff, and never omit the safety confirmations.
 - Never bury blockers in earlier text only — they must appear here.
 - If you opened a PR, state clearly that review is needed.
 - If you reviewed but could not merge, name the exact gate that blocked it.
@@ -268,7 +294,18 @@ Rules:
   bypass classifiers, profile gates, missing permissions, or live-consent
   requirements**; give the owner concrete options.
 
-Required format:
+**Use the long format below instead of the compact one only when the task was
+high-risk or complex** — i.e. when any of these happened:
+
+- a merge, tag, or release
+- failed validation
+- permissions/profile gates blocked work
+- secrets or production access were involved
+- a complicated owner decision
+- multiple repos or cross-issue state
+- the owner explicitly asks for the full format
+
+Long format (high-risk/complex tasks only):
 
 ```md
 ## Controller Handoff Summary

skills/llm-project-workflow/templates/review-pr.md

@@ -33,6 +33,6 @@ Steps:
    - Eligibility: passed/failed
 
 Handoff: reviewer identity, PR author, scope verdict, checks + results, decision —
-formatted as the Controller Handoff Summary (SKILL.md §K); if you could not
-merge, name the exact gate that blocked it.
+formatted per SKILL.md §K (compact by default; long form if a merge happened
+or a gate blocked you); if you could not merge, name the exact gate.
 ```

skills/llm-project-workflow/templates/start-issue.md

@@ -37,6 +37,6 @@ Steps:
 8. Stop before review/merge — you are the author.
 
 Handoff: issue #, branch, worktree path, files changed, checks + results, PR URL —
-formatted as the Controller Handoff Summary (SKILL.md §K); end with
-"Review needed — PR is open".
+formatted as the compact Controller Handoff (SKILL.md §K; long form only on
+the high-risk triggers); Review line: "Review needed — PR is open".
 ```