Conciseness

The body is dense, table-and-bullet heavy, and assumes the reader's competence (no boilerplate about what docs are), but it carries real redundancy: the fact that tests.md is produced by /derive-tests is stated three times (lines 39, 71, 97), and the Locations section's defaults are restated in Notes — matching 'mostly efficient but could be tightened' rather than anchor 4's only-minor-trimming.

Actionability

For an instruction-only skill the guidance is concrete: exact table columns ('Name · used-by · scope (server/client) · source · rotation · risk'), default paths (documentation/, reports/<name>_{timestamp}.md), a mandated three-section structure for tests.md, and an operational case-collision rule with concrete examples. It falls short of fully executable anchor 5 only in lacking a skeleton or example row per document to copy, and sits clearly above anchor 3's pseudocode-level vagueness.

Workflow Clarity

The repo-discovery sequence (look for agent instructions, docs location, existing equivalents, coverage map, reports location; then follow, use defaults, say which) is well ordered, but the end-to-end pipeline is implicit — which of /document-app, /derive-tests, and /ship-check runs when, and in what order documents are produced, is scattered across Notes, and there is no explicit checkpoint validating the written docs. This matches 'sequence present but checkpoints missing or implicit'.

Progressive Disclosure

Scored against the actual bundle: no references/scripts/assets files exist, so the body's /document-app, /derive-tests, and /ship-check mentions are command references rather than dangling file links. The single ~93-line file is clearly sectioned (Locations, organization, numbered core docs 1-5, conditional docs 6-9, Notes) with each doc spec compact — matching anchor 4's 'good structure, most content appropriately placed', and short of anchor 5 both because it exceeds the simple under-50-line case and because per-document specs could plausibly live in well-signaled reference files.

Specificity

Enumerates the concrete deliverables (architecture, user/permission flows, permissions, variables/secrets, test-coverage map, emails, scheduled work, SEO, embedded agents/automation) and the actions around them ('Defines what each doc must capture and how a reviewer or auditor uses it') in third person, but the opening 'The durable documentation set that makes an AI-built (vibe-coded) app reviewable' is conceptual rather than action-level, keeping it just below the comprehensive anchor 5 and clearly above the 1-2-action anchor 3.

Completeness

It explicitly answers both what ('The durable documentation set... Defines what each doc must capture and how a reviewer or auditor uses it') and when ('Use when documenting a codebase for handoff, mapping... or preparing for a security or performance audit') with concrete trigger phrases, matching the anchor-5 example structure; it is well above anchor 4, where the 'when' would be weaker or less specific.

Trigger Term Quality

Natural user phrases like 'documenting a codebase for handoff', 'mapping user journeys and trust-boundary crossings', 'planning test coverage', 'security or performance audit', and 'vibe-coded' give good trigger coverage, but common synonyms ('write docs', 'onboarding documentation', 'test plan') are absent — matching the good-but-few-missing anchor 4 rather than the comprehensive synonym/extension coverage of anchor 5.

Distinctiveness Conflict Risk

A clear niche — making AI-built/vibe-coded apps reviewable before shipping — with distinctive triggers ('trust-boundary crossings', 'reviewable before shipping', 'test-coverage map') that would not fire for generic documentation or testing skills, matching the minimal-conflict anchor 5.