Conciseness

The body is dense imperative bullets with zero padding and no explanation of concepts Claude already knows — e.g., 'Never overwrite originals. Fix through `generate_variants` (`creativeRange: REFINE`, `variantCount: 1`)' and 'Generation takes minutes. On timeout do not retry; poll `get_screen` every 30 s, max 10.' Every token is operational, matching the lean level-5 anchor.

Actionability

Guidance is fully executable: exact tool names and parameters (`generate_variants` with `creativeRange: REFINE`, `variantCount: 1`), runnable commands (`npx @google/design.md lint DESIGN.md`, `node scripts/audit_html.js <dir>`), a concrete endpoint and header, and precise thresholds (longest edge <=1600 px, poll every 30 s, max 10, max 2 edit passes). This is copy-paste-ready instruction for the common cases rather than the pseudocode of level 3 or the minor gaps of level 4.

Workflow Clarity

Sections sequence the process (Preflight -> Read -> Write Safely -> DESIGN.md -> Prompting) with explicit validation checkpoints and feedback loops: lint 'must report 0 errors and 0 warnings before upload', 're-audit after each pass', screenshots confirm visual judgement, and rejected images trigger ID/metadata recovery before any retry. Destructive operations (delete_project, apply_design_system to originals) are gated on explicit approval, matching the level-5 anchor including error-recovery loops.

Progressive Disclosure

The 42-line body is a lean overview with clearly signaled, one-level-deep references — [Stitch MCP](references/stitch-mcp.md) (with verified anchors #bounded-image-review and #omp-image-recovery), [DESIGN.md](references/design-md.md), and [Prompting](references/prompting.md) — and supporting scripts in scripts/. The bundle structure matches the referenced paths, and navigation is easy, matching the level-5 anchor.

Specificity

The description lists five concrete actions — 'read screens, write and lint DESIGN.md, create design systems, and fix designs through variants instead of overwriting' — with comprehensive coverage of the skill's capabilities. It goes beyond the level-4 anchor because no material actions are missing for this domain.

Completeness

It explicitly answers both what ('read screens, write and lint DESIGN.md, create design systems, fix designs through variants') and when ('Use when reviewing, editing, or generating Stitch screens or DESIGN.md files') with concrete trigger phrases. This matches the level-5 anchor example closely and is not merely the implicit 'when' of level 4.

Trigger Term Quality

Natural terms like 'Stitch screens', 'DESIGN.md files', 'reviewing, editing, or generating', and 'Google Stitch' give good keyword coverage a user would plausibly say. It falls short of the level-5 anchor because a few natural variations users might say (e.g., 'mockups', 'UI designs', 'design review') are absent.

Distinctiveness Conflict Risk

'Google Stitch over MCP' and 'DESIGN.md' name a clear niche with distinct triggers; the skill is unlikely to fire for unrelated document or design work. Minimal conflict risk, matching the level-5 anchor.