Conciseness

Every section carries operational facts Claude would not know (the `.md` suffix trick, the uncommitted-mirror copyright rationale, the lock-diff review mechanism, the shared-filename resolution gotcha) with no padding or explanations of known concepts. Time-sensitive dates are confined to a dedicated "## Last verified" section where the date is the content itself.

Actionability

Commands are copy-paste ready: `curl -s https://docs.docker.com/ai/sandboxes/customize/kit-reference.md`, `skills/finding-sbx-docs/scripts/fetch-docs.sh`, `git diff -- skills/finding-sbx-docs/references/docs.lock`, `sbx --version`, and `sbx <cmd> --help`, plus concrete numbered procedures for lookup and claim-checking.

Workflow Clarity

Each workflow (find the page, check a claim, carry a change) is an ordered sequence with stop conditions, and the batch "carry a change" workflow has explicit validation: the lock diff defines the batch, "Done means every changed page is accounted for" is the checklist, and failure modes come with recovery guidance (re-fetch rather than re-relink; suspect the mirror before believing the diff).

Progressive Disclosure

The body is a navigable overview whose referenced paths — `scripts/fetch-docs.sh`, `scripts/relink-docs.py`, `references/docs.lock`, and the script-generated `references/docs/README.md` and `.fetched` — are one level deep, clearly signaled, and match the actual bundle (the deliberately uncommitted mirror's absence is explicitly explained). The page-to-skill ownership table provides navigation to the rest of the family.

Specificity

"Locate the official Docker Sandboxes page behind a claim", "build or refresh the local mirror of the docs", and "carry what changed upstream into the other sbx skills" list multiple concrete actions that comprehensively cover the skill's purpose.

Completeness

The what is explicit (locate the page, build/refresh the mirror, carry changes into other skills) and the when is explicit with four concrete "Use when..." triggers, matching the top anchor.

Trigger Term Quality

"checking whether an sbx claim still holds", "when an sbx release lands", and "a skill's verification date needs moving" are natural trigger phrases, and both "Docker Sandboxes" and "sbx" appear as synonyms. A few natural phrasings (e.g. "docs mirror", "re-fetch the docs") are absent, so it sits just below the comprehensive-coverage anchor.

Distinctiveness Conflict Risk

The description carves out a clear niche — verifying sbx documentation claims and refreshing the docs mirror for the sbx skill family — with triggers unlikely to fire for any other skill.