Conciseness

The body is lean and assumes Claude's competence — the injected markdown block is the payload with no padding — matching 'Efficient; minor instances of over-explanation that could be trimmed'. The Prerequisites line "AGENTS.md must exist in project root" duplicates the File Target instruction "If AGENTS.md does not exist, inform the user and stop". Not a 5 due to that redundancy; not a 3 because there is no unnecessary explanation of concepts Claude already knows.

Actionability

The skill provides a copy-paste-ready markdown block and an exact injection location ("after the 'Project tooling Stack' section, before 'Architecture'"), matching 'Mostly executable guidance; concrete code or commands with minor gaps'. Not a 5 because there is no fallback instruction for when the anchor sections ('Project tooling Stack' / 'Architecture') do not exist in the user's AGENTS.md; not a 3 because the injected content and target are fully concrete, not pseudocode.

Workflow Clarity

The workflow is a clear sequence with checkpoints — "Verify proper markdown formatting", "No duplicate sections" — matching 'Clear sequence with most checkpoints present; minor validation gaps'. Not a 5 because the Workflow only says "Locate 'Architecture' section" while Injection Location references two anchors, and there is no step for handling a missing 'Architecture' section; not a 3 because verification steps are explicitly present.

Progressive Disclosure

Per the guideline for skills under 50 lines with no need for external references, the well-organized section headers (Purpose, Prerequisites, File Target, Injection Location, Code Style Rules, Workflow) and self-contained single-file structure warrant a 5. All content is appropriately inline with no buried or nested references.

Specificity

The description names the domain ("Deno/TypeScript code-style rules to AGENTS.md") and one concrete action, but never enumerates what the skill actually does (e.g., injecting dependency-import and Dockerfile rules), matching the anchor 'Names domain and 1-2 concrete actions, but not comprehensive'. It is not a 4 because there are not several specific actions listed, and not a 2 because the action named is concrete rather than generic.

Completeness

The 'when' is explicit ("Use when the user asks to add... or during initial Deno project setup") and the 'what' is discernible from the trigger clause, matching 'Has both what and when; when could be more explicit' — here the 'what' could be more explicit. Not a 5 because there is no standalone capability statement; not a 3 because the 'when' is explicitly stated, not missing or weakly implied.

Trigger Term Quality

Natural phrases a user would say are present — "add Deno/TypeScript code-style rules to AGENTS.md", "initial Deno project setup" — matching 'Good keyword coverage; a few natural terms missing'. Not a 5 because synonyms and variations like "coding conventions", "coding standards", "linting rules", or file extensions are absent; not a 3 because the core triggers are specific and natural rather than missing common variations.

Distinctiveness Conflict Risk

The description carves out a clear niche (Deno-specific AGENTS.md style rules) and explicitly redirects conflicts: "Do NOT trigger for non-Deno TypeScript projects (use setup-agent-code-style-strict), or for runtime-agnostic style advice" — matching 'Clear niche with distinct triggers; minimal conflict risk'.