Conciseness

The ~25-line body is lean and every line carries non-obvious, tool-specific information (the preamble-becomes-the-target hazard, why a foreground run loses annotations, 'closing the session is not approval') — it assumes Claude's competence with no padding, matching the 'every token earns its place' anchor. It is not a 4 because there are no over-explanations to trim.

Actionability

The guidance is fully executable: the exact command (`plannotator last`), the exact tool option (`is_background: true`, no trailing `&`), how to retrieve the output, and a complete three-branch outcome table keyed to concrete JSON fields ("decision": "dismissed", "decision": "approved" with a "feedback" field). This matches the 'copy-paste ready commands; specific examples cover the common cases' anchor.

Workflow Clarity

The sequence is unambiguous (run in background → end turn without stopping → read the output file → act per branch) and every possible outcome has an explicit handling rule, which serves as the checkpoint structure. Per the scoring notes for simple single-purpose skills, a single unambiguous action with full outcome branching scores 5; this is not a destructive or batch operation, so the validation cap does not apply.

Progressive Disclosure

This is a single-file skill under 50 lines with no bundle files (references/, scripts/, assets/ are absent) and no content that warrants external files; the body is organized into clear sections (when to use, preamble warning, run command, background handling, numbered Behavior list). Per the scoring notes, such a skill scores 5 with just well-organized sections.

Specificity

The description names the domain and 1-2 concrete actions ("Open Plannotator on the latest rendered assistant message", "use the returned annotations to revise that message or continue"), matching the 'names domain and 1-2 concrete actions, but not comprehensive' anchor. It does not reach 4 because it is not a list of several specific actions covering the skill's capabilities.

Completeness

The 'what' is clear (open Plannotator on the latest message and act on returned annotations), but the 'when' is entirely absent — there is no 'Use when...' clause or equivalent explicit trigger guidance, which per the judging guidelines caps completeness at 3. It cannot score 4, which requires both what and when.

Trigger Term Quality

Relevant keywords exist ("Plannotator", "annotations", "revise", "assistant message") but common natural variations users would say — "feedback", "review", "mark up" — are missing, fitting the 'some relevant keywords but missing common variations or synonyms' anchor rather than the good-coverage anchor at 4.

Distinctiveness Conflict Risk

The description is anchored to a named niche tool ("Open Plannotator") with a distinct, specific trigger surface (latest rendered assistant message, returned annotations), giving minimal overlap risk with other skills — a clear fit for the 'clear niche with distinct triggers' anchor.