Conciseness

The ~21-line body is lean and every token earns its place: the bang-executed command plus an exhaustive output contract with exact match strings and JSON decision values. It assumes Claude's competence and explains nothing the model already knows, matching the score-5 anchor rather than the minor-trimming of score 4.

Actionability

Guidance is fully executable: the command `plannotator annotate-last $ARGUMENTS` runs on load, exact match text ("The user approved."), JSON decision keys ("approved", "dismissed", "annotated"), and prescribed responses ("Approved.", "Annotation session closed.") cover all common cases. Per the rubric's code-vs-instruction note, an instruction-only skill with this specificity earns the top anchor.

Workflow Clarity

A simple single-action skill where the action is unambiguous: run the command, then dispatch on an exhaustive, mutually exclusive three-way outcome list with explicit stop/proceed directives for each branch. The rubric's simple-skill exception applies, and no destructive or batch operations are involved, so the validation cap does not apply.

Progressive Disclosure

The skill is under 50 lines, self-contained with no bundle files (no references/, scripts/, or assets/ directories exist), and organized into two clear sections ("Message annotations", "Your task"). This matches the rubric's guidance that short skills with no need for external references can score 5 with well-organized sections alone.

Specificity

The description lists several concrete actions — "Open Plannotator on the latest rendered assistant message" and "use the returned annotations to revise that message or continue" — which goes beyond the 1-2 actions of the score-3 anchor. It is not comprehensive (the approved/dismissed acknowledgment flows are unmentioned), so it does not reach the score-5 anchor.

Completeness

The "what" is clear and specific, but there is no "Use when..." clause or equivalent explicit trigger guidance, which caps completeness at 3 per the judging guidelines. It is not a 4 because the "when" is entirely absent rather than merely imprecise, and not a 2 because the "what" is concrete rather than vague.

Trigger Term Quality

Natural terms a user would say are present: "Plannotator", "annotations", "revise", "continue", and "assistant message". A few natural synonyms ("mark up", "review", "feedback") are missing, which fits the good-coverage-with-gaps anchor rather than the comprehensive score-5 anchor.

Distinctiveness Conflict Risk

"Plannotator" is a unique proper noun and the scenario (annotating the latest rendered assistant message) is highly specific, giving a clear niche with minimal conflict risk. No other skill would realistically match these triggers, so the score-4 minor-overlap anchor does not fit.