Conciseness

The body is dense with non-obvious, edge-case guidance that assumes Git competence (per-worktree refs, gc.worktreePruneExpire, extensions.worktreeConfig migration) with no padding, but the repair rule is restated three times (opening paragraph, 'Choose the manager and location', safety constraints) and a few sentences over-compress into cryptic phrasing. This fits the 4 anchor ('efficient; minor instances that could be trimmed') better than 5's every-token-earns-its-place.

Actionability

Concrete commands appear in the body (git worktree list --porcelain -z, git check-ignore -q, git worktree lock --reason, git worktree add -b) with clearly defined placeholders, and the complete command set is copy-paste ready in the one-level-deep reference. It is not 5 because some guidance remains workflow-abstract ('Use the repository's merge, rebase, squash, or PR workflow') and a few operations are described only as conditions rather than commands.

Workflow Clarity

The skill is sequenced in clear phases (choose checkout, choose manager/location, establish starting state, develop and integrate, cleanup decision tree, completion report) with explicit validation checkpoints at every risky step: verify returned path and commit, require check-ignore exit 0, review every prune dry-run entry, verify integration via ancestry, and a final 'Verify the result' re-listing step. This matches the 5 anchor including feedback loops for destructive and batch operations.

Progressive Disclosure

The SKILL.md is a well-organized overview and the single reference (references/raw-git-commands.md) is one level deep, real, clearly signaled, and linked at the point of need with anchored sections (#creation, #cleanup, #registration). This matches the 5 anchor: clear overview with well-signaled one-level-deep references and appropriate content split.

Specificity

The description lists six concrete actions ('create, list, reuse, repair, or remove linked checkouts; integrate their task branches; prune stale registrations') covering the full worktree lifecycle, matching the comprehensive-coverage anchor. It is not 4 because no lifecycle phase is missing.

Completeness

It explicitly answers both what ('Manage Git worktrees: create, list, reuse, repair, or remove... integrate... prune') and when ('Use when tasks need separate working directories sharing one repository') with a concrete trigger phrase. Not 4: the when-clause is explicit, not weakly implied.

Trigger Term Quality

Natural terms like 'Git worktrees', 'linked checkouts', and 'separate working directories' are present, but a few common synonyms users might say (e.g. 'working tree', 'parallel branches') are absent. It sits between the 4 and 5 anchors, fitting 4 ('good keyword coverage; a few natural terms missing') better than 5's comprehensive synonym coverage.

Distinctiveness Conflict Risk

A clear niche (Git worktree management) with distinct trigger phrasing; virtually no overlap risk with other skills. It clearly matches the 5 anchor rather than 4, since even closely related Git skills would not be wrongly triggered by these terms.