Conciseness

The body is lean and assumes Claude's competence — no concept explanations, just commands and steps. However, minor filler could be trimmed: the opening "Read the relevant development guidelines before starting your task" and step 6's "Understand the coding standards and patterns you need to follow, then proceed with your development plan" restate what the numbered steps already convey. This sits between anchor 5 (every token earns its place) and anchor 4 (minor instances that could be trimmed), closer to 4.

Actionability

Mostly executable guidance: "python3 ./.trellis/scripts/get_context.py --mode packages" is copy-paste ready, and "cat .trellis/spec/<package>/<layer>/index.md" plus "cat .trellis/spec/guides/index.md" are concrete. Minor gaps keep it below anchor 5: the cat commands require substituting placeholders with no sample of the get_context.py output showing what package/layer values look like, and there is no fallback if the script is absent. It is well above anchor 3 because the commands are real, not pseudocode, and the placeholder use is justified by dynamic discovery.

Workflow Clarity

A clear 6-step numbered sequence from discovery to reading the actual guideline files, with an explicit error-prevention checkpoint in step 4 ("The index is NOT the goal — it points you to the actual guideline files") and a mandatory gate ("This step is mandatory before writing any code"). The skill is read-only (no destructive or batch operations), so validation loops are not required, and as a simple under-50-line single-purpose skill with an unambiguous sequence it matches the top anchor per the simple-skills note.

Progressive Disclosure

The skill has no bundle files (no references/, scripts/, or assets/), and at ~30 lines it needs none — all detailed content appropriately lives in the project's .trellis/ tree, which the skill delegates to with exact paths. Per the rubric's simple-skills guidance, an under-50-line skill with no need for external references scores 5 with well-organized sections, which the numbered step structure provides. It is not score 4 because there is no content that should have been split out and every pointer is one level deep.

Specificity

The description lists multiple concrete actions — "Discovers and injects project-specific coding guidelines from .trellis/spec/", "Reads spec indexes, pre-development checklists, and shared thinking guides for the target package" — with a clearly named domain and comprehensive coverage of what the skill does, matching the top anchor. It is not score 4 because there are no minor gaps: every listed action is specific and the scope is fully covered.

Completeness

It explicitly answers both questions: what it does ("Discovers and injects... Reads spec indexes, pre-development checklists, and shared thinking guides") and when to use it ("Use when starting a new coding task, before writing any code, switching to a different package, or needing to refresh project conventions and standards") with concrete trigger phrases. Not score 4 because the when-clause is fully explicit rather than needing more specificity.

Trigger Term Quality

The when-clause covers natural trigger phrases with synonyms: "starting a new coding task", "before writing any code", "switching to a different package", "needing to refresh project conventions and standards", plus the concrete path ".trellis/spec/". This matches comprehensive natural-term coverage including synonyms; it is not score 4 because no common variation a user would naturally say is clearly missing.

Distinctiveness Conflict Risk

It occupies a clear niche — reading .trellis/spec/ guidelines before development — with distinct triggers tied to that ecosystem, so it is unlikely to fire for unrelated skills. Not score 4 because the .trellis-specific scope leaves only minimal overlap risk with closely related skills.