Conciseness

The body is lean throughout — e.g., 'Name the next kit skill. Stop.' and 'An SDK is not a CLI. An MCP server is not an SDK.' — with every line being a mapping, boundary, or checkpoint and no explanations of concepts Claude already knows. It matches anchor 5 and is not anchor 4 because there is no over-explanation left to trim.

Actionability

The guidance is concrete and executable for an instruction-only skill ('Name the next skill as `/name`.', 'Give one ready-to-type line.', 'If two skills apply, give the order.') with the common cases enumerated per flow. It is anchor 4 rather than 5 only because there is no worked example of the final answer line it asks for.

Workflow Clarity

As a simple single-purpose skill, its single action is unambiguous: a four-step 'How to answer' sequence ('1. Match the situation to one flow or one standalone skill ... 4. If two skills apply, give the order. Then stop.') with explicit done-when checkpoints. There are no destructive or batch operations, so the validation cap does not apply, and the simple-skill exception holds.

Progressive Disclosure

The body is well organized into clear sections ('## Docs: place, then write', '## Tooling: pick the artifact', '## How to answer') with all router content appropriately inline, no external references needed, and no nesting or buried references. It matches anchor 5's well-signaled, easy-to-navigate structure.

Specificity

The description names its domain ('A router over the skills in this kit') and one concrete action ('Ask which kit skill or flow fits the situation'), matching anchor 3's 'domain and 1-2 concrete actions'. It falls short of anchor 4 because it does not list several specific actions, and is above anchor 2 because the stated action is concrete rather than generic.

Completeness

The 'what' is clear (a router that names the fitting kit skill), but there is no 'Use when...' clause or equivalent explicit trigger guidance; the 'when' is only weakly implied by 'fits the situation'. Per the judging guidelines, a missing explicit trigger clause caps completeness at 3.

Trigger Term Quality

'fits the situation' and 'which kit skill or flow' mirror a phrase a user might naturally say, but common variations and synonyms (e.g., 'which skill should I use', 'route me to') are missing, matching anchor 3. It is not anchor 4 because keyword coverage is thin — a single natural phrasing — and not anchor 2 because the phrase is relevant rather than generic.

Distinctiveness Conflict Risk

'A router over the skills in this kit' carves a distinct meta-routing niche unlikely to trigger for working skills, matching anchor 4. It is not anchor 5 because the description lacks explicit distinct trigger phrases, and it is above anchor 3 since no other skill in the kit occupies this role.