Conciseness

The body is dense with directives and explains nothing Claude already knows — every phase carries operational content ("Write it to `.artifacts/plans/issue-<number>.md`", "rationale (max 1000 chars)"). It is not a 5 because the "Behavior Rules" section largely restates rules already established in the phases ("Verify, then plan" reprises Phase 1; "One terminal call" reprises Phase 4), a small amount of duplicated tokens that could be trimmed.

Actionability

Guidance is highly concrete for an instruction-only skill: named tool call (`factory_transition_work_item`), exact parameters (`stage: "execute"`, `expectedRevision` from the `factory-phase` signal, `rationale` max 1000 chars), an explicit artifact path, and an explicit prohibition ("Do not call `submit_plan`"). Not a 5 because there is no example of the transition call payload or a sample rationale, and the plan's verification commands are described but not exemplified — minor gaps rather than missing steps.

Workflow Clarity

Four clearly sequenced phases each carry explicit validation checkpoints — "Confirm the root cause and contributing areas against the code as it exists now", "Never build phases on unconfirmed claims" — and Phase 4 includes a full feedback loop: on rejection, "read the stated reason, address it (re-check the revision... rework the plan...), and retry once corrected." This matches the top anchor (clear sequence, explicit validation, error-recovery loop).

Progressive Disclosure

The skill is a single self-contained SKILL.md (~57 lines of body) with no bundle files in references/, scripts/, or assets/ and no need for them — per the judging guidelines, a sub-50-line skill with no external-reference need scores 5 on well-organized sections alone. Sections are cleanly headed (Phases 1-4, Behavior Rules) and the one path mentioned (`.artifacts/plans/`) is an output location, not a nested reference, so navigation is trivial.

Specificity

The description names the domain ("Factory work item") and two concrete actions — "Produce a phased implementation plan" and "advance it to execute" — matching the 1-2-concrete-actions anchor. It is not a 4 because it omits the rest of the skill's coverage (verify understanding, design decisions, plan handoff structure), leaving minor-to-moderate gaps.

Completeness

The "what" is clear (produce a phased implementation plan, advance to execute), but there is no "Use when..." clause or any explicit trigger guidance for when to invoke the skill — per the judging guidelines this caps completeness at 3. It is not a 2 because the "what" is concrete, not vague.

Trigger Term Quality

Relevant domain keywords exist ("implementation plan", "work item", "execute"), but they are pipeline jargon rather than the natural phrases a user would say, and no synonyms or variations are offered. Not a 4 because the natural-language triggers (e.g. "plan this Factory issue", "move a work item to implementation") are absent; not a 2 because the keywords are specific to the domain rather than generic filler.

Distinctiveness Conflict Risk

The Factory-planning niche is mostly distinct — "Produce a phased implementation plan for a Factory work item, then advance it to execute" would rarely fire for unrelated skills. Not a 5 because the description shares the planning/implementation vocabulary with closely related pipeline skills (e.g. a triage or execute stage skill) without distinct trigger phrases to disambiguate.