Conciseness

The body never explains what Claude already knows (no 'what a PR is', no tool tutorials — it explicitly instructs the opposite: "Explain this change, not the reviewer's tools"), and nearly every sentence states a rule, a concrete example, or an exemption ("Record decisions with their rejected alternatives. This is the highest-value content in most descriptions and it cannot be recovered from the diff"). It assumes competence ("Skip it when a competent reviewer will know where to look") and dedicates an entire step to cutting. This matches the 5 anchor (lean, every token earns its place) rather than the 4, where instances of over-explanation could be trimmed — I could not find any sentence whose only job is padding.

Actionability

Guidance is concrete and executable throughout: copy-paste-ready commands ("git --no-pager log <base>..HEAD", "gh pr view <n> --repo <owner/repo> --json title,commits,files,baseRefName", "gcloud iam roles describe"), a default body shape with exact headings ("## Review guide", "## What changed", "## Validation"), word-count anchors per change size, and quoted example phrasings for the validation section ("Expect one destroy and one create, nothing else"). Per the code_vs_instruction note, an instruction-only skill with this density of specific guidance warrants 5 rather than 4.

Workflow Clarity

A clear numbered sequence (1 collect facts → 2 follow template → 3 write body → 4 reviewer guidance → 5 cut → 6 self-check) with verification built into the workflow (step 1: "Do not forward a claim you have not checked" with a list of specific cheap checks) and a closing self-check checklist that includes an error-recovery loop ("Did the cut take a decision...? ...Put them back"). This matches the 5 anchor (explicit validation steps, feedback loops, checklist); no gaps keep it at 4.

Progressive Disclosure

The bundle structure is clean: two reference files (references/plain-language.md, references/review-guide.md), both real, both one level deep, both linked exactly at their point of use with their content signaled ("See references/plain-language.md for the rules and the exemptions"; "See references/review-guide.md, which opens with a short map of which of its sections you need" — verified true: that file opens with a 'Which part of this file you need' section). The bulky material (plain-language rules, review-guide details) is split out rather than inlined, and the body keeps only the decisions. This is the 5 anchor (clear overview, well-signaled one-level-deep references), not the 4.

Specificity

"Writes the body of a pull request - the summary, the repository template sections, and reviewer guidance such as a recommended reading order and focus areas" names multiple concrete, domain-specific actions spanning the whole task (summary, template sections, reading order, focus areas). It is comprehensive rather than having minor gaps, so it matches the 5 anchor, not the 4 ('several specific actions; minor gaps in coverage'); third-person voice is used correctly.

Completeness

It explicitly answers both questions: what ("Writes the body of a pull request - the summary, the repository template sections, and reviewer guidance...") and when ("Use whenever drafting or revising a PR description, filling in a repository's PR template... Use it even when the user only says 'open a PR'..."). Both are concrete and explicit, matching the 5 anchor rather than the 4 ('when' could be more explicit).

Trigger Term Quality

The description covers natural phrasings comprehensively, including indirect user asks users actually say: "drafting or revising a PR description", "filling in a repository's PR template", "refreshing a description that no longer matches the branch", "preparing a branch for review", plus the quoted colloquial triggers "open a PR", "put this up for review", and "write this up". This is the 5 anchor (comprehensive synonyms and variations); the 4 anchor's 'a few natural terms missing' does not fit.

Distinctiveness Conflict Risk

The niche is clear and well-bounded ("Writes the body of a pull request" vs. the mechanics of opening one, with the body text explicitly deferring to `create-pr`), so it is well above the 3 anchor. However, the deliberate trigger "Use it even when the user only says 'open a PR', 'put this up for review', or 'write this up' without naming the description" claims requests that could equally invoke a PR-creation or review skill, which is a minor overlap risk with closely related skills — the 4 anchor, not the 5 ('minimal conflict risk').