Conciseness

The body is efficient: no explanations of concepts Claude already knows, and the bulk is two copy-paste-ready templates plus a concrete update procedure. It is not a 5 because the "Recommended Categories" section (~12 lines) restates categories already evident in both templates, and the "Goal" section's three-point explanation of the router concept is slightly padded relative to the "When to Use" section that already conveys it.

Actionability

Guidance is mostly executable: two complete snippet templates ready to copy into a target repo, a concrete command ("./scripts/generate-skill-index-snippets.sh --update-readme"), a validation command ("./scripts/validate-marketplace.sh"), and a numbered update procedure with specific rules ("Keep names exactly matching frontmatter IDs"). It falls short of 5 because the referenced scripts are not part of this skill's bundle (no scripts/ directory), so their behavior and failure modes are unverifiable from the skill alone.

Workflow Clarity

"How to Update Snippets After Skill Changes" gives a clear 5-step sequence (update plugin.json → ensure frontmatter names → run validate-marketplace.sh → update routing lists → regenerate and re-copy downstream snippets) with an explicit validation checkpoint at step 3. It is not a 5 because there is no feedback loop for validation failures and no final verification that the regenerated snippet matches the registry, leaving minor validation gaps at the end of the sequence.

Progressive Disclosure

Structure is good: purpose, source of truth, both templates, README regeneration, update procedure, and categories are each clearly sectioned, and the whole skill is a self-contained overview with no nested or buried references. It is not a 5 because the body exceeds the simple-skill threshold (119 lines vs the under-50 guideline) and carries some inline redundancy (categories section, two parallel full templates) that a small references/ split could relieve, plus it references repo-level scripts without bundling or describing them.

Specificity

"Create and maintain AGENTS.md / CLAUDE.md snippet indexes that route tasks to the correct dotnet-skills skills and agents (including compressed Vercel-style indexes)" lists several specific actions (create, maintain, route tasks to skills/agents, produce compressed Vercel-style variants) tied to concrete artifacts. It falls short of a 5 because it does not comprehensively cover related operations (e.g., regenerating README index blocks or validating the registry), and short of specificity in the sense of enumerating the snippet categories; it is clearly above a 3 since more than 1-2 concrete actions are named.

Completeness

The "what" is clear (create/maintain snippet indexes that route tasks to skills and agents, including compressed variants), but there is no "Use when..." clause or equivalent explicit trigger guidance, which caps completeness at 3 per the judging guidelines. It is not a 2 because the "what" half is concrete, and not a 4 because the "when" half is entirely absent rather than merely underspecified.

Trigger Term Quality

Relevant keywords are present — "AGENTS.md", "CLAUDE.md", "snippet indexes", "skills", "agents", "Vercel-style" — but the phrases a user would naturally say when needing this skill (e.g., "add a new skill", "update the plugin registry", "skill routing index", "AGENTS.md boilerplate") are only weakly implied. It sits between anchor 3 (some relevant keywords, missing common variations) and anchor 4, closer to 3 because no explicit use-when phrasing surfaces the natural trigger terms.

Distinctiveness Conflict Risk

The niche is narrow — generating routing-index snippets for AGENTS.md/CLAUDE.md from a dotnet-skills plugin registry — so it is mostly distinct with minimal conflict risk. It is not a 5 because the description lacks explicit trigger phrases that would fully disambiguate it from adjacent skills like generic AGENTS.md authoring or plugin-validation skills, leaving minor overlap risk.