Conciseness

The body is lean and assumes Claude's competence — no git/gh basics are explained, and repo-specific facts Claude cannot know ("an architecture review, a mutation review ... take minutes, not seconds") justify their tokens. Commands carry inline comments ("# run in the background; resolves when all checks finish") instead of surrounding prose, matching the 5 anchor; the one duplicated rebase snippet appears in two genuinely distinct contexts, so nothing is trimmable enough to drop it to 4.

Actionability

Fully executable throughout: "gh pr checks <pr> --watch --interval 30", "gh run watch <run-id> --interval 20 --exit-status", "gh pr view <pr> --json mergeStateStatus -q .mergeStateStatus", "npm run check && git push --force-with-lease", and "gh pr merge <pr> --squash --delete-branch". Every phase has copy-paste-ready commands and per-status branches cover the common cases, matching the 5 anchor rather than 4's 'minor gaps'.

Workflow Clarity

Three clearly sequenced phases (watch → close the loop → merge) with explicit validation ("check the PR is actually mergeable before you merge"), a feedback loop ("re-check `mergeStateStatus` until it's mergeable"), and error-recovery guidance ("never end the turn silently on a failed merge"). The destructive-operation cap does not apply because validation checkpoints are present, so it matches the 5 anchor, not 4.

Progressive Disclosure

No bundle files exist and none are needed: the skill is a single coherent workflow with numbered, well-organized sections where everything belongs inline and navigation is trivial. Per the simple-skill guidance, well-organized sections with no need for external references warrant a 5; there are no organization gaps that would justify 4.

Specificity

The description lists four concrete actions — "watching CI, weighing the agentic reviews, resolving merge conflicts, and merging once everything is green" — which is comprehensive coverage of the PR-shepherding domain. It clearly matches the 5 anchor rather than 4, since no meaningful capability in the workflow is left out.

Completeness

It explicitly answers both questions: the "what" is the four concrete actions, and the "when" is "Use whenever an open PR needs shepherding to a merge", reinforced by a clear boundary ("Assumes the PR already exists ... this skill starts from there"). This matches the 5 anchor's requirement for concrete trigger phrases, not merely the implicit 'when' of anchor 4.

Trigger Term Quality

Good natural-language coverage: "open PR", "watching CI", "merge conflicts", "merging once everything is green", "watching a PR through to landing" are phrases users would actually say. It falls short of the 5 anchor because synonyms like "pull request" spelled out and terms like "checks" or "PR comments" are missing, but it is well above anchor 3's partial coverage.

Distinctiveness Conflict Risk

It carves a clear niche — post-creation PR shepherding — and explicitly delimits it ("Assumes the PR already exists (code is written, pushed, and `gh pr create` has run)"), minimizing conflict with code-writing, review, or PR-creation skills. The explicit boundary pushes it past anchor 4's 'minor overlap risk' to anchor 5.