Conciseness

The body is dense and mostly earns its tokens — every step carries non-obvious, calibrated detail ('Do not "fix" it to `$BASE...HEAD`', 'a dirty tree has no stable identity... can never be deduped'). But there are minor instances of over-explanation that could be trimmed, e.g., the multi-line justification of `|| true` shell behavior and trust-model prose like 'Be honest about that rather than implying a boundary that does not exist'. Fits the 4 anchor; not 5 because not every token earns its place, and not 3 because the padding is minor rather than 'several unnecessary explanations'.

Actionability

Mostly executable guidance: complete bash blocks with variables and error handling, a fill-in charter template, the full Agent dispatch prompt, and the draft frontmatter spec. Not 5 because critical parts are delegated by name to the sibling skill rather than being copy-paste ready — 'Use `review-pr`'s verification block exactly... the single-`verdict` shell gate' and 'the prompt shape from `review-pr` Step 5' require reading another skill to execute. Not 3 because everything actually present is concrete and executable, not pseudocode.

Workflow Clarity

Seven clearly sequenced steps with explicit validation checkpoints and feedback loops: `test -n "$BASE" || FATAL`, the empty-diff `test -s` gate, write-then-verify-then-move, the 'Refuse to run on the default branch' check, Step 5's per-agent evidence verification with a retry-once rule ('re-dispatch once, demanding a line in the far half of the file'), and sandbox cleanup. Matches the 5 anchor — clear sequence, explicit validation, error-recovery loops.

Progressive Disclosure

Good structure: clean step sections, and it deliberately delegates bulk to the sibling skill with clearly signaled references ('Read it, don't reimplement it', 'Same shape as `review-pr` Step 5') instead of duplicating security-critical shell — sound one-level-deep disclosure. Not 5 because no bundle files exist and the references point at another skill's sections rather than bundled files, and the ~215-line body keeps the charter and dispatch templates inline; not 3 because organization is clearly better than 'references present but not clearly signaled'.

Specificity

The description lists multiple concrete actions with comprehensive coverage — 'Deep code review of the branch you are standing on', 'Scope is merge-base..working-tree, so it covers commits, staged and unstaged changes together', the four named lanes 'implementation, verification, approach, security', and 'saves a draft to ~/.nx-branch-reviews/<branch>.md' — which matches the 5 anchor. Reduced by 1 per the rubric's voice rule because it uses second person ('the branch you are standing on').

Completeness

Explicitly answers both questions: the 'what' is concrete (scope definition, four review lanes, sandbox CLI, draft path) and the 'when' is an explicit trigger clause with concrete phrases ('Use when asked to review "this branch", "my changes", or work that is not yet on GitHub'). Matches the 5 anchor exactly.

Trigger Term Quality

Good natural keyword coverage: 'review "this branch"', '"my changes"', 'work that is not yet on GitHub', 'before it becomes a PR' — phrases a user would naturally say. Not 5 because a few natural synonyms are missing (e.g., 'local changes', 'review my diff', 'pre-push'); not 3 because coverage clearly goes beyond 'some relevant keywords'.

Distinctiveness Conflict Risk

Clear niche with distinct triggers: it explicitly separates itself from the sibling PR-review skill ('before it becomes a PR', 'work that is not yet on GitHub'), so 'review this branch / my changes' routes here rather than to a PR skill. Conflict risk is minimal; not 4 because the boundary with the closest related skill is stated explicitly rather than left to inference.