Conciseness

The body is dominated by repo-specific conventions and copy-paste commands Claude could not know, with no padding explaining known concepts. Minor over-explanation remains (e.g., the "Why is there a custom executor" rationale paragraph and "In most cases, you would like to use a command like this"), so it is efficient but could be trimmed slightly. Not 5 because a few sentences do not earn their tokens; not 3 because there is no unnecessary concept explanation.

Actionability

Concrete, executable commands appear throughout ("npm run vally validate-stimulus", "npm run test:vally -- --plugin $PLUGIN_DIR --skill $SKILL", full "npx @microsoft/vally-cli grade ... --verbose < results/<test-run-name>/results.jsonl" invocations, concrete file-layout paths). Not 5 because key authoring tasks defer to external documentation — the eval suite YAML schema ("Refer to the official documentation on the schema of the spec") and custom grader creation ("follow the examples in the official vally documentation") lack inline examples.

Workflow Clarity

Sections are sequenced by task (write, validate, run locally, run in CI, extend, re-grade, collect results) and include a validation checkpoint ("a script is added to validate the eval suites and report errors when it sees any violation") plus a re-grade feedback loop ("keep tuning the grader config ... and re-grade the trajectory until the results meet your expectations"), with MUST/MUST NOT constraints flagged. Not 5 because there is no explicit fix-and-re-validate loop after validation errors, and the authoring workflow itself is not laid out as ordered steps.

Progressive Disclosure

The body is a well-sectioned overview with clearly signaled one-level-deep references that exist in the bundle ("See [azure-fixtures](./references/azure-fixture.md) for more details", "Refer to [ci-test](./references/ci-test.md)"), and detail content (Azure fixtures, CI setup) is appropriately split into those files. Navigation is easy and nothing that belongs in references is inlined.

Specificity

"Author, validate, and run Vally evaluation suites" lists several concrete third-person actions (author, validate, run) in a clearly named domain. Not 3 because more than 1-2 actions are named; not 5 because capabilities like re-grading trajectories and custom graders are not mentioned, leaving minor gaps in coverage.

Completeness

"Author, validate, and run Vally evaluation suites for agent skills" explicitly answers what the skill does, and "TRIGGERS: ..." provides explicit, concrete trigger guidance equivalent to a 'Use when...' clause. Both what and when are clearly and explicitly stated.

Trigger Term Quality

The TRIGGERS list covers natural phrases ("create eval", "write eval", "run eval", "validate eval"), synonyms ("map test to eval", "migrate test to eval", "add stimulus"), specialized terms ("eval graders", "eval scoring", "add eval to CI"), and a file extension ("eval.yaml"), matching comprehensive coverage.

Distinctiveness Conflict Risk

"vally eval", "eval.yaml", and "add stimulus" establish a clear niche with minimal conflict risk, but broadly generic terms like "create eval", "write eval", and "run eval" could overlap with other evaluation-related skills. Mostly distinct with minor overlap risk, so not 5.