Conciseness

Lean and dense throughout — it assumes git competence and spends tokens only on non-obvious gotchas (absolute vs relative git-dir, trailing-slash check-ignore, one-branch-one-worktree), with no padded explanations of what worktrees are; every sentence earns its place.

Actionability

Fully executable copy-paste commands for every case — `git worktree add -b <branch-name> .worktrees/<branch-name> origin/<from-branch>`, the PR fetch-and-checkout flow, and the failure-handling branch — covering new work, existing refs, PRs, and errors.

Workflow Clarity

Clear Step 0 → Step 1 → Step 2 sequence with explicit decision checkpoints (Equal/Different, submodule vs linked worktree, already-checked-out) and an error-recovery feedback loop that asks the user via the blocking-question tool rather than proceeding.

Progressive Disclosure

Self-contained with no bundle files (references/scripts/assets absent) and well-organized sections (Step 0/1/2, two modes, failure handling); for a self-contained skill this structure is appropriately navigable.

Specificity

Names the domain and multiple concrete actions — 'create a new branch for fresh work' and 'attach a worktree to an existing branch, PR, or commit' — giving comprehensive coverage; not a level below because it lists several specific actions rather than 1-2.

Completeness

Explicitly answers both what ('Set up isolated git worktrees — create a new branch... or attach...') and when ('Use when starting isolated work or isolating an existing ref') with concrete trigger phrases.

Trigger Term Quality

Good natural keyword coverage — 'worktree', 'branch', 'PR', 'commit', 'isolated work', 'isolating an existing ref' — but a few natural synonyms users might say (e.g. 'parallel work', 'checkout') are absent, so it sits just below the comprehensive anchor.

Distinctiveness Conflict Risk

Targets a clear niche — isolated git worktrees — with distinct triggers and minimal overlap risk with other skills.