Conciseness

The body is lean and assumes Claude's competence: it contains no concept explanations, no library background, and no padding — every section carries repo-specific facts Claude cannot infer (file paths, auth constraints, validation commands). This matches anchor 5 ('Lean and efficient; every token earns its place'); the only density is the plan.md/tasks.md bookkeeping in workflow step 6, which is information load rather than over-explanation, so it does not drop to anchor 4.

Actionability

Guidance is concrete and mostly executable: exact file paths per path ('src/main/provider/defaults.ts', 'src/main/provider/providerRegistry.ts'), a copy-paste validation block ('pnpm run format / i18n / lint / typecheck'), a required-inputs checklist, and an output checklist. It falls just short of anchor 5 because there is no worked example of the most common case (e.g., a sample registration entry or defaults.ts snippet for the OpenAI-compatible path) — the actual edit shape is left to Claude's inspection of existing files, which is a minor gap rather than the pseudocode-level gap of anchor 3.

Workflow Clarity

The 7-step workflow has a clear sequence with inspection-before-editing, explicit classification, and a validation stage (format, i18n, lint, typecheck, focused tests) plus test-coverage assessment in step 5. It matches anchor 4 ('Clear sequence with most checkpoints present; minor validation gaps') but not anchor 5, because there is no explicit feedback loop stating what to do when a validation command or test fails (fix-and-retry), and the validation gate is not stated as a precondition for reporting results.

Progressive Disclosure

The body is well structured with clear sections (Goal, Required Inputs, three Supported Paths, Guardrails, Workflow, Output Checklist), no nested or buried references, and all in-repo file pointers are concrete. It matches anchor 4 ('Good structure; most content is appropriately placed; minor organization gaps'): with no bundle files provided the skill is self-contained, but the three path sections and their 'Typical files' lists are borderline candidates for split-out reference material, and there is no navigation/signposting beyond the section headers, keeping it below anchor 5's 'well-signaled one-level-deep references'.

Specificity

The description names the domain ("DeepChat LLM provider") and one concrete action ("Add a DeepChat LLM provider through explicit reviewed source changes"), but does not enumerate multiple specific actions the skill performs. It clearly matches anchor 3 ("Names domain and 1-2 concrete actions, but not comprehensive") and falls short of anchor 4's "Lists several specific actions", since the enumerated phrases belong to the trigger clause rather than to the capability list.

Completeness

It explicitly answers both questions: 'what' ("Add a DeepChat LLM provider through explicit reviewed source changes") and 'when' ("Use when a developer asks Codex to add a provider, provider profile, upstream provider config, model catalog mapping, provider auth behavior, or a special provider adapter in this repository") with concrete trigger phrases. This matches anchor 5 exactly; anchor 4 would require the 'when' clause to be less explicit or specific, which is not the case.

Trigger Term Quality

The 'Use when' clause covers natural trigger phrasings users would say: "add a provider, provider profile, upstream provider config, model catalog mapping, provider auth behavior, or a special provider adapter". This is good keyword coverage but not comprehensive — common variations like 'model list', 'API key setup', or 'base URL' (all concepts the body treats as required inputs) are missing, so it sits at anchor 4 rather than anchor 5.

Distinctiveness Conflict Risk

The description carves a clear niche — provider integration in the DeepChat repository — with distinct triggers ('special provider adapter', 'model catalog mapping', 'upstream provider config') unlikely to match unrelated skills. Anchor 5 ("Clear niche with distinct triggers; minimal conflict risk") is the best fit; anchor 4 would require notable overlap with a closely related skill, which is not evident.