Conciseness

The body is dense and procedural with no explanations of concepts Claude already knows, and nearly every sentence carries operational instruction (e.g., "Run `git rev-parse --show-toplevel` and `git remote get-url origin`"). It is not a 5 because the Behavior Rules section partially restates earlier content ("One terminal call" repeats the opening paragraph and Phase 4; "Decide and record" repeats the Decision rule), which could be trimmed.

Actionability

Guidance is concrete and executable: exact commands (`git rev-parse --show-toplevel`, `git remote get-url origin`, `gh repo view --json visibility`), a named terminal tool call with parameters (`factory_transition_work_item`, `stage: "execute"`, `expectedRevision` from the `factory-phase` signal, rationale max 1000 chars), and an exact artifact path (`.artifacts/plans/issue-<number>.md`). It is not a 5 because a few specifics are still abstract — no example transition payload or sample plan snippet — though per the scoring notes absence of code in an instruction-only skill is not itself penalized.

Workflow Clarity

The sequence is explicit and ordered (Repository Guard → Phase 1 Verify → Phase 2 Design → Phase 3 Write Plan → Phase 4 Transition) with explicit validation checkpoints (repo verification before the first edit and again before push; verify inherited understanding against current code) and an explicit error-recovery feedback loop ("If it is rejected, read the stated reason, address it... and retry once corrected"). Validation steps are present, so the destructive/batch cap does not apply, and the Behavior Rules section closes with a checklist — matching the top anchor.

Progressive Disclosure

No bundle files exist, and the content is well-organized into clearly headed sections with everything appropriately placed inline for a self-contained workflow skill. It is not a 5 because the body (~63 lines) exceeds the under-50-line simple-skill exception and a couple of sections (the untrusted-data handling paragraph, the Repository Guard detail) could arguably be split into a reference file; it is well above a 3 since nothing that belongs in a separate file is bloating the main body.

Specificity

"Produce a phased implementation plan for a Factory work item, then advance it to execute" names the domain and exactly two concrete actions (produce the plan, advance to execute), matching the anchor for 1-2 concrete actions. It is not a 4 because only two actions are listed rather than several, and no sub-capabilities (verify understanding, design, transition) are mentioned.

Completeness

The description has a clear "what" (produce a phased implementation plan, advance the work item to execute) but contains 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 just implicit.

Trigger Term Quality

Relevant domain keywords are present ("implementation plan", "Factory work item", "phased", "execute") but common variations and synonyms a user might naturally say ("planning stage", "plan this issue", "work item planning") are missing. It is above a 2 because the terms are domain-specific rather than generic, but below a 4 because keyword coverage is sparse.

Distinctiveness Conflict Risk

"Factory work item" and "advance it to execute" establish a clear niche in the Factory workflow that generic planning skills would not match, giving mostly distinct triggers. It is not a 5 because the description does not distinguish this skill from its closely related sibling (factory-triage), so a user asking to "plan" a work item could plausibly trigger either.