Conciseness

Nearly every sentence carries a project-specific rule (naming conventions, lane assignment, gateway naming, update semantics) rather than generic BPMN explanation Claude already knows, matching the 'efficient; minor instances of over-explanation' anchor. It falls short of 5 because sentences are long and the no-activity-without-use-case rule is restated in four places (Modeling rules, Missing use cases, Workflow step 3, and the Checklist/DO NOT lists), which could be tightened.

Actionability

Guidance is fully executable for an instruction skill: copy-paste commands (`python3 <skill directory>/scripts/bpmn_layout.py docs/processes/BP-001-book-loan.bpmn`, `--check`, the glob `**/*test-case/scripts/bpmn_paths.py`), concrete naming examples (`Book Loan` → `BP-001-book-loan.bpmn`), example element ids (`StartEvent_BookWanted`, `Flow_CopyAvailable_Yes`), and exact documentation line formats. This matches the top anchor rather than 4, where minor gaps in concrete detail would remain.

Workflow Clarity

The 7-step Workflow has an explicit user-confirmation gate before writing (step 2), a validation command with a feedback loop ('Fix and rerun until it does', step 5), a Completeness Checklist (step 6), and stop conditions in Missing use cases. Clear sequence, explicit checkpoints, error-recovery loops, and a checklist match the top anchor; validation of the batch write operation is present, so no cap applies.

Progressive Disclosure

The body holds the rules and points to one-level-deep bundle files that all exist — [references/process.bpmn.md](references/process.bpmn.md) and [references/example.bpmn.md](references/example.bpmn.md) introduced in a Template section, and [scripts/bpmn_layout.py](scripts/bpmn_layout.py) in Diagram layout. The bulk material (full template, complete example, layout tool) is appropriately split out with clear signals, matching the top anchor for well-signaled one-level-deep references.

Specificity

Multiple concrete actions are stated — "Creates or updates BPMN 2.0 business process models", "one pool per process, one lane per actor, every activity one use case, gateways for the decisions between them, and a diagram layout a modeler such as bpmn.io can open" — with file locations, BP-XXX ids, and update semantics covered. This matches the anchor for comprehensive concrete coverage, not the level below (which would leave gaps in capability coverage).

Completeness

The "what" is explicit (creates/updates BPMN 2.0 models with pool/lane/activity/gateway conventions and BP-XXX ids) and the "when" is explicit with concrete trigger phrases ("Use when the user asks to 'model the business process'… or mentions a business process, process model, BPMN, swimlanes, or a .bpmn file"), plus an additional trigger condition from review/use-case findings. This clearly matches the top anchor rather than the 4 anchor where 'when' could be more specific.

Trigger Term Quality

Good natural coverage: quoted phrases "model the business process", "create a BPMN", "draw the process", "update BP-001" plus keywords "business process, process model, BPMN, swimlanes, or a .bpmn file" including a file extension. It stops short of the 5 anchor because common synonyms such as "workflow" or "process flow diagram" a user might naturally say are missing.

Distinctiveness Conflict Risk

A clear niche — BPMN 2.0 process modeling with .bpmn files, swimlanes, BP-XXX ids, and named sibling skills (/test-case, /use-case-diagram) — makes misrouting unlikely; the generic phrase "mentions a business process" is the only broad trigger, and it is on-topic for the skill. Not the 4 anchor, since overlap is minimal rather than a real risk with closely related skills.