Conciseness

The body is lean and assumes Claude's competence — no explanations of what handlers, templates, SQL, or package layers are; every rule states only repo-specific knowledge Claude could not infer. Matches the anchor "Lean and efficient; assumes Claude's competence; every token earns its place".

Actionability

Concrete, repo-specific guidance throughout: exact paths ("internal/cloud/dashboard/*.templ", "internal/cloud/dashboard/static/styles.css", "store/cloudstore", "_templ.go") and an artifact-to-location mapping ("New route -> handler + tests in dashboard/server package"). Not a 5 because a few targets are partial — "dashboard/server package" and "docs/catalog" lack full paths, leaving minor ambiguity about exact locations.

Workflow Clarity

This is a simple single-task decision skill (no multi-step process), and the single action — deciding where a new artifact goes — is unambiguous via the explicit artifact-to-location table and placement rules. No destructive or batch operations exist, so no validation checkpoints are required under the rubric's simple-skill exception.

Progressive Disclosure

The skill is under 50 lines, needs no external reference files (none exist in references/, scripts/, or assets/, and the body references none), and is organized into four clear, well-labeled sections — matching the rubric's guidance that such skills can score 5 with just well-organized sections.

Specificity

"Repository structure and placement rules for Engram" names the domain specifically, and the trigger enumerates concrete artifact types ("files, packages, handlers, templates, styles, or tests"), but the description states no actions the skill performs — it falls between anchor 2 (generic minimal actions) and anchor 3 (domain plus 1-2 concrete actions).

Completeness

Both parts are present: a "what" ("Repository structure and placement rules for Engram") and an explicit "when" ("Trigger: Creating files, packages, handlers, templates, styles, or tests in this repo"). Not a 5 because the "what" is a terse label rather than an explicit statement of what the skill does or decides.

Trigger Term Quality

"Creating files, packages, handlers, templates, styles, or tests in this repo" covers good natural trigger vocabulary a developer would say, but misses common variations and synonyms such as "adding", "new route", "where does this go", and file extensions (.templ, .css, .go).

Distinctiveness Conflict Risk

The description is scoped to a single repository ("for Engram", "in this repo") with niche placement-focused triggers, giving it a clear niche with minimal conflict risk against general-purpose skills.