Conciseness

The body is lean and imperative with essentially no explanation of concepts Claude already knows — commands and parameters are stated directly ("Run `git rev-parse --show-toplevel` and `git remote get-url origin`"). Minor trimmable redundancy exists: the Behavior Rules section recapitulates the Decision rule and Phase 1 ("Never build phases on unconfirmed claims" restates "Never plan against an understanding you haven't verified"), keeping it at anchor 4 rather than the every-token-earns-its-place level of anchor 5.

Actionability

Guidance is concrete and executable: exact git commands, the tool call name `factory_transition_work_item` with its parameters (`stage: "execute"`, `rationale` max 1000 chars), and a specific artifact path `.artifacts/plans/issue-<number>.md`. Minor gaps remain — the fresh-thread understanding pass is delegated to "as `factory-triage` does" without concrete steps, and no full example of the transition call is given — so it sits at anchor 4 rather than the fully copy-paste-ready level of anchor 5.

Workflow Clarity

The sequence is explicit (Repository Guard → Phase 1 verify → Phase 2 design → Phase 3 write plan → Phase 4 terminal transition) with validation checkpoints and feedback loops: the repository guard is re-run immediately before push, and a rejected transition triggers "read the stated reason, address it, ... retry once corrected". The Behavior Rules section functions as a checklist, matching anchor 5.

Progressive Disclosure

There are no bundle files, and this single-file skill (~68 lines of body) has no content that belongs in separate reference files: every section is a cohesive step of one workflow, well-organized with clear headers and no nested or buried references. Per the simple-skill exception, well-organized sections without external references warrant anchor 5.

Specificity

The description lists two concrete, domain-anchored actions — "Produce a phased implementation plan for a Factory work item" and "advance it to execute" — which are specific rather than generic. It falls between anchor 3 (1-2 concrete actions, not comprehensive) and anchor 4 (several specific actions): the actions are noticeably more specific than anchor-3 examples like "Processes PDF files and extracts content", but coverage omits planning sub-activities (verification, assumptions), so it does not reach anchor 5.

Completeness

The "what" is clear and concrete, but there is no "Use when..." clause or equivalent explicit trigger guidance — the "when" is only weakly implied by the Factory context. This matches anchor 3 ("Has a clear 'what' but 'when' is missing or only weakly implied") and the judging guideline caps completeness at 3 for a missing trigger clause.

Trigger Term Quality

Terms a user would naturally say in the Factory context are present: "implementation plan", "Factory work item", "execute", "phased". Coverage is good but misses common variations and synonyms (e.g., "planning stage", "plan the work item", "move to build"), matching anchor 4 rather than the comprehensive synonym coverage of anchor 5.

Distinctiveness Conflict Risk

The phrase "Factory work item" plus the stage-advancement action carves a clear niche distinct from general planning skills; the only overlap risk is with sibling Factory phase skills (e.g., factory-triage, factory-execute). It is mostly distinct with minor overlap risk against closely related skills, matching anchor 4 rather than the minimal-conflict clarity of anchor 5.