Conciseness

The body is dense and procedural — commands, paths, and file-layout conventions with almost no padding — e.g. "npm run vally validate-stimulus", "npx @microsoft/vally-cli grade --eval-spec ... --verbose < results/<test-run-name>/results.jsonl". Minor trimmable instances exist ("In most cases, you would like to use a command like this", the dashboard infrastructure explanation), so not 5; not 3 because there is no noticeably verbose or redundant section.

Actionability

Concrete copy-paste commands with cwd comments, exact file layouts ("<repo-root>/evals/<plugin-dirname>/<skill-name>/*.yaml"), and full re-grade invocations. Not 5 because the custom-grader section only says "follow the examples in the official vally documentation" with no inline example, the wrapped --grader-plugin command reads as a broken two-line snippet, and the trailing note resolves to "copilot-sdk-executor.ts" instead of vally-graders.ts. Not 3 because the given commands are fully executable, not pseudocode or high-level hints.

Workflow Clarity

Sections sequence the lifecycle (write → validate → run locally → run in CI → extend → re-grade → collect results) and include an explicit validation step ("npm run vally validate-stimulus"), a re-grade feedback loop ("keep tuning the grader config in eval.yaml and re-grade ... until the results meet your expectations"), and the earlyTerminate/`completed` grader warning as a checkpoint. Not 5 because the overall ordering is only implied by section order and there is no explicit "only proceed when validation passes" gate; not 3 because validation checkpoints are explicitly present.

Progressive Disclosure

The ~99-line body is a well-sectioned overview that defers detail via clearly signaled, existing one-level references ([azure-fixtures](./references/azure-fixture.md), [ci-test](./references/ci-test.md)) plus the official external docs for the spec schema. Not 5 because references/azure-fixture.md chains a second-level reference to ../../../../docs/azure-fixture.md and the body mixes root-relative (/tests/...) and ascent-relative (../../../tests/...) link styles; not 3 because references are clearly signaled and content is appropriately split.

Specificity

"Author, validate, and run Vally evaluation suites for agent skills" names the domain and three concrete actions, but coverage has minor gaps — custom graders, re-grading, and CI integration are covered by the skill body yet absent from the description. Not 3 because more than 1-2 concrete actions are listed; not 5 because the action list is not comprehensive for what the skill does.

Completeness

The description clearly answers "what" (author, validate, and run Vally evaluation suites) and "when" via the explicit TRIGGERS clause, which is equivalent to a "Use when..." clause with concrete trigger phrases. Not 4 because the when-guidance is explicit rather than weakly implied.

Trigger Term Quality

The explicit TRIGGERS list provides comprehensive natural-phrase coverage with synonyms ("create eval, write eval, add eval"), a file-extension form ("eval.yaml"), and workflow phrases ("add stimulus, map test to eval, migrate test to eval, eval graders, eval scoring, add eval to CI"). Matches the anchor for comprehensive coverage including synonyms and file extensions.

Distinctiveness Conflict Risk

"vally eval", "eval.yaml", and "add stimulus" carve a clear niche, but generic terms like "run eval" and "eval scoring" could overlap with other evaluation/testing skills. Mostly distinct with minor overlap risk against closely related test tooling skills; not 5 because the eval namespace is shared by many testing skills.