Conciseness

Dense and project-specific throughout — the definition language, account semantics, mapping paths and legacy-key tables are things Claude could not know, and there is no explanation of known concepts. Minor instances keep it from a 5: the 'no registration step' fact is stated in both the intro and step 5, and the checklist necessarily recaps the workflow sections.

Actionability

Fully executable guidance: exact file paths, complete JSON definition examples with annotated fields, copy-paste-ready Swift golden-test code (StubbedProvider setup, #expect assertions), exact commands ('tuist test', 'python3 scripts/gen-docs.py && python3 scripts/check-docs.py --strict', 'npm test' in website/), and named repository properties for legacy key migration. Specific examples (minimax.json, grok.json, ampcode.json) cover the common cases.

Workflow Clarity

A clearly sequenced six-step TDD workflow (research/fixtures, red golden tests, green definition, generic language growth, look and place, docs/release) with explicit validation checkpoints and feedback loops: tests fail first because the JSON doesn't exist, ProviderFactory validates kinds, 'npm test' in website/ fails until counts match, the docs check must pass, and a closing checklist consolidates verification.

Progressive Disclosure

Good structure: every external doc is signaled with what it contains ('how a definition runs', 'which module a file goes in', 'the words') and references are one level deep — references/provider-icon-guide.md exists and matches its citation. Not a 5 because the ~100-line inlined definition-language spec (the three sums tables, settings/accounts/mapping schemas) is reference-grade material that could live in its own bundle file, keeping the overview leaner.

Specificity

The what is concrete ('Add an AI provider to ClaudeBar as a JSON definition run by the one generic Provider and DataSource') with enumerated sub-tasks (a setting, an added account, an old saved key kept working, a CLI/API/format change). It stops short of anchor 5's 'multiple specific concrete actions' because it names one primary action rather than a list of distinct operations; it is well above anchor 3 since the mechanism and sub-tasks are explicit, not generic.

Completeness

Explicitly answers both what ('Add an AI provider to ClaudeBar as a JSON definition run by the one generic Provider and DataSource') and when ('Use this skill when: (1)...(4)') with four concrete trigger scenarios including quoted user phrasings. Matches the anchor-5 example pattern exactly; a 4 would require the when-clause to be less explicit, which it is not.

Trigger Term Quality

Includes natural phrases users would actually say verbatim ('how do I add a new provider', 'create a provider for X') plus concrete vendor names (Antigravity, Cursor). Not a 5 because a few natural variants are absent, e.g. 'integrate X with ClaudeBar' or 'track X usage'; well above a 3 since common phrasings are quoted directly rather than merely implied.

Distinctiveness Conflict Risk

A clear niche — adding provider definitions to one specific app (ClaudeBar) — with distinct, quoted triggers ('add a new provider', 'create a provider for X') that would not fire for unrelated skills. Minimal conflict risk.