Conciseness

The ~13-line pointer body is lean with zero over-explanation, but the hard-coded version number ('Hunk versions before 0.24') is time-sensitive information outside an old-patterns/deprecated section, and the 'If it fails' conditional already carries the fallback logic — a minor instance that could be trimmed, matching the 4 anchor rather than a clean 5.

Actionability

Three copy-paste-ready commands cover the common cases: `hunk skill show hunk-extensions`, the `hunk skill path hunk-extensions` fallback, and the install URL for when hunk is absent — fully executable guidance, the 5 anchor.

Workflow Clarity

A simple single-purpose skill whose one action ('Before anything else, load them and follow them') is unambiguous, with an explicit conditional chain (try `skill show` → 'If it fails' use `skill path` → 'If `hunk` is not on PATH' install) serving as explicit checkpoints — per the simple-skill note this earns 5, not 4, because failure branches are explicit rather than implicit.

Progressive Disclosure

The body is a pure pointer with a clearly signaled, one-level-deep reference to the CLI's own bundled skill — exactly the 5 anchor structure ('clear overview with well-signaled one-level-deep references'); under 50 lines with nothing inlined that belongs elsewhere and no nested references.

Specificity

Enumerates ten concrete capability areas ('hiding or reordering reviewed files, docked panes, alternate file views, commands and key bindings, dialogs, workspace writes, themes, syntax languages, VCS backends, lifecycle events'), comprehensively covering the authoring surface it claims to map — the 5 anchor, not 4, because no appreciable sub-area is missing.

Completeness

Explicitly answers both what ('Maps the `hunkdiff/extension` authoring surface...') and when ('Use when writing, debugging, or installing a Hunk extension...') with concrete trigger phrases, plus a negative boundary — a clear 5, not 4, since the 'when' clause is explicit and specific rather than vague.

Trigger Term Quality

Natural trigger phrases are present ('Use when writing, debugging, or installing a Hunk extension, or when a request asks Hunk itself to behave differently') alongside feature words users would say (themes, key bindings, hide reviewed files), but a few common synonyms like 'customize', 'configure', or 'plugin' are absent — the 4 anchor rather than comprehensive 5.

Distinctiveness Conflict Risk

Clear niche (Hunk extension authoring) with product-anchored triggers and an explicit disambiguation ('Not for reviewing a diff in a live session — that is hunk-review'), actively de-conflicting from its sibling skill — minimal conflict risk, the 5 anchor.