Conciseness

Every line is a project-specific rule or command Claude could not know (uv-wrapped git, SHA peeling, digest headers, frozen pre-commit revs); there is no padding or explanation of known concepts. Lean and efficient — anchor 5.

Actionability

Guidance is fully executable: exact commands ('git ls-remote --tags', 'gh api ... --jq .object', "curl -sI -H 'Accept: application/vnd.oci.image.index.v1+json' ...", 'pre-commit autoupdate --freeze', 'cd vibe && uv run scripts/check_startup_import_cost.py') and exact syntax templates ('uses: owner/action@<commit-sha> # vX.Y.Z'). This matches anchor 5 — copy-paste ready with the common cases covered.

Workflow Clarity

As a conventions skill it has no single multi-step sequence, but each rule includes explicit conditions and validation checkpoints (confirm import count stays within budget, 'git cat-file -t <sha>' → commit, 'sha256sum -c' with hard-fail on missing hash) plus error-recovery branches (push rejected → rebase; PR open → merge; overshoot → investigate, not bump). Anchor 4 fits: clear conditional guidance with only minor sequence/validation gaps versus the full feedback-loop structure of anchor 5.

Progressive Disclosure

The body is ~32 lines with well-organized sections and no external bundle files (no references/, scripts/, or assets/ directories exist), so nothing needs offloading. Per the rubric's simple-skill guideline, well-organized sections alone warrant anchor 5.

Specificity

The description names its domains ('Git workflow, CI/GitHub Actions, and supply-chain pinning rules') but states no concrete actions — it is a noun-phrase list with no verbs describing what the skill does. This matches anchor 2 (domain named, actions minimal/generic) rather than 3, which requires 1-2 concrete actions.

Completeness

It explicitly answers 'what' ('Git workflow, CI/GitHub Actions, and supply-chain pinning rules for Mistral Vibe') and 'when' ('Use when changing CI pipelines, GitHub Actions, dependency pinning, container images, pre-commit hooks, git workflow, or external binary downloads') with concrete trigger phrases, matching the top anchor.

Trigger Term Quality

'CI pipelines, GitHub Actions, dependency pinning, container images, pre-commit hooks, git workflow, external binary downloads' covers the natural phrases a user would say when they need this skill. A few common synonyms are missing (e.g., 'pin versions', 'workflows', '.github'), keeping it below the comprehensive anchor 5.

Distinctiveness Conflict Risk

The supply-chain pinning, container-image, and pre-commit triggers form a clear project-specific niche, but 'git workflow' is a broad trigger that could overlap with a general git or commit-conventions skill. Mostly distinct with minor overlap risk — anchor 4, not 5.