Conciseness

The body is lean with no padding: sections like 'Challenge against the glossary' and 'Offer ADRs sparingly' give instructions in 1-3 sentences each. The single parenthetical aside ('Merely *reading* `AGENTS.md` for vocabulary is not this skill...') does real scope-setting work rather than over-explaining what Claude already knows.

Actionability

Concrete, executable guidance throughout — example challenge dialogue ('Your glossary defines "cancellation" as X, but you seem to mean Y. Which is it?') and a crisp three-condition ADR checklist. It falls short of 5 only because the actual glossary and ADR formats are deferred to AGENTS-FORMAT.md and ADR-FORMAT.md, which do not exist in the bundle, leaving the two most concrete tasks without their format details.

Workflow Clarity

The process is clearly organized (file structure detection via CONTEXT-MAP.md, then session behaviors, then lazy file creation), and 'Cross-reference with code' acts as a verification checkpoint. Not 5: the session behaviors are presented as parallel patterns rather than a sequenced flow with explicit checkpoints, and no explicit feedback loop is described for resolving the contradictions the skill tells the agent to surface.

Progressive Disclosure

Sections are well-organized and the body is appropriately short, but both references — '[AGENTS-FORMAT.md](./AGENTS-FORMAT.md)' and '[ADR-FORMAT.md](./ADR-FORMAT.md)' — point to files that do not exist anywhere in the bundle (no references/ directory, no such files at the root). Navigation to the load-bearing format details is broken, which is worse than having no references at all.

Specificity

'Build and sharpen the domain model' names the domain but offers a single generic action phrase — it never states the concrete capabilities the body delivers (challenge conflicting terms, write glossary entries, create ADRs). This matches anchor 2 ('Names the domain but actions are minimal or generic'); it is not 3 because no second concrete action is stated.

Completeness

Both parts are present: 'Build and sharpen the domain model' answers what, and 'Trigger: codebase terminology, AGENTS.md, ADRs' is equivalent explicit trigger guidance, so the missing-'Use when' cap does not apply. Not 5: the 'what' is a single thin sentence and the trigger phrases are bare nouns rather than concrete usage phrases.

Trigger Term Quality

The trigger 'codebase terminology, AGENTS.md, ADRs' includes some relevant keywords, but misses natural variations a user would actually say — 'glossary', 'domain terms', 'ubiquitous language'. Matches anchor 3 ('Some relevant keywords but missing common variations or synonyms'); not 4 because those gaps are noticeable.

Distinctiveness Conflict Risk

'domain model', 'AGENTS.md', and 'ADRs' carve out a recognizable niche with distinct file-based triggers. Minor overlap risk remains with general documentation- or writing-oriented skills, so it falls just below anchor 5.