Conciseness

The body is a lean routing table plus a 7-step workflow with zero padding and no explanation of concepts Claude already knows; every line (stack names, signature files, target outputs, commands) carries instruction. Matches the 'lean and efficient; every token earns its place' anchor.

Actionability

Concrete executable commands are given ("python3 scripts/detect_stack.py --root .", "scripts/upsert_section.py --file <path> --content-file <ref> --hash --substitute pm=<pm>", exact marker format), plus a manual fallback. Not 5: the source of the "pm" substitution value and how the marker hash is produced are not defined in the body; not 3: the commands are real and executable, not pseudocode, with only minor gaps.

Workflow Clarity

A clearly sequenced 7-step workflow with real checkpoints: "Never write before confirmation", confirmation step with dry-run/remove modes, "Never alter text outside the markers", and a determinism claim ("Re-running on unchanged code is byte-identical"). Not 5: no explicit post-write verification step (e.g., re-reading the upserted file to confirm content outside markers is intact) or error-recovery loop; not 3: checkpoints are explicit, not implicit.

Progressive Disclosure

SKILL.md is a pure router: a routing table maps each detected stack to its exact reference file and load condition, and all 14 references/ files plus 2 scripts and 2 assets exist and are one level deep (reference files do not point to further reference files). Per-stack detail, baseline text, and the AGENTS.md section template are all correctly split out of the overview.

Specificity

"Deterministically detects tech stack layers, confirms with the user, generates tailored guidelines from modular references, and links them from AGENTS.md without overwriting user content" lists multiple specific concrete actions with comprehensive coverage (anchor 5), but the first-person phrasing "detect my stack" violates the third-person-voice rule, reducing the score by 1. Not 3: far more than 1-2 concrete actions; the capability sentence itself is purely third person.

Completeness

Explicitly answers 'what' ("detects tech stack layers, confirms with the user, generates tailored guidelines... and links them from AGENTS.md") and 'when' with a concrete "Use when asked to... on first use in a codebase" trigger clause, plus explicit exclusions. Clearly matches the anchor for both what and when with concrete trigger phrases.

Trigger Term Quality

Natural phrases users would say are well covered: "generate or set up coding guidelines", "generate AGENTS.md rules", "create stack-specific conventions", "set up agent guidelines". Not 5: common variations like "coding standards" or "code style" are missing; not 3: multiple natural synonyms and phrasings are present rather than only some relevant keywords.

Distinctiveness Conflict Risk

A clear niche (stack detection → guideline generation → AGENTS.md linking) with distinct triggers, and explicit boundary guidance: "Excludes general code review, linter/formatter configuration, or CI pipeline setup" minimizes conflict with related skills.