Conciseness

The body contains no concept explanation or padding: every directive line (prerequisites, injection location, workflow) is terse, and the large markdown block is the verbatim payload the skill exists to deliver, not over-explanation. This matches 'lean and efficient; every token earns its place' rather than anchor 4, which requires instances of over-explanation that could be trimmed.

Actionability

The skill provides the exact copy-paste-ready markdown block to inject, the precise insertion point ('after the "Project tooling Stack" section, before "Architecture"'), and prerequisites. It is fully executable, matching anchor 5 rather than anchor 4, which would imply gaps in the concrete guidance.

Workflow Clarity

The workflow checklist is a clear sequence and includes verification checkpoints ('Verify proper markdown formatting', 'No duplicate sections'). It falls short of anchor 5 because there is no feedback loop for error recovery — e.g., no guidance on what to do if the 'Project tooling Stack' anchor section is missing — but it is above anchor 3, which requires missing or only implicit checkpoints.

Progressive Disclosure

A single self-contained file with clear, well-ordered sections (Purpose, Prerequisites, Injection Location, Rules, Workflow) and no buried or nested references, which fits anchor 4. It does not reach anchor 5 / the simple-skill exception: the ~90-line rules payload exceeds the minimal size where structure alone suffices, and the bulk payload could alternatively live in a one-level-deep reference file to keep SKILL.md as an overview.

Specificity

'Add TypeScript strict-mode code-style rules to AGENTS.md' names the domain and one concrete action (plus the sourcing note 'write it from here, not from memory'), matching anchor 3 ('1-2 concrete actions'). It does not list several specific actions about what the injected rules cover, so anchor 4 does not fit.

Completeness

It explicitly answers both: what ('Add TypeScript strict-mode code-style rules to AGENTS.md... write it from here, not from memory') and when ('Use when the user asks for strict-mode style rules'), plus a negative boundary. This matches anchor 5's clear-and-explicit what-and-with with concrete trigger phrases, exceeding anchor 4 where 'when' could be more explicit.

Trigger Term Quality

Good keyword coverage: 'TypeScript', 'strict-mode', 'code-style rules', 'AGENTS.md', and 'Deno' are natural phrases for this request. A few natural synonyms are missing ('conventions', 'coding standards', 'style guide'), which keeps it at anchor 4 rather than anchor 5's comprehensive synonym/extension coverage, and it is clearly above anchor 3's 'some relevant keywords'.

Distinctiveness Conflict Risk

It has a clear niche (TypeScript strict-mode rules for AGENTS.md) with distinct triggers and an explicit exclusion pointing to the sibling skill ('Not for Deno projects (use setup-agent-code-style-deno)'), giving minimal conflict risk — anchor 5.