Conciseness

The body is almost entirely operational (mapping tables, exact hex tokens, default rules, template), but the Background aside about OpenDesign's "71-system catalog" and the Section 3 paragraph about repo package schema ("not the current repository package schema... manifest.json, tokens.css") are extraneous history that could be trimmed. These are minor instances of over-explanation in an otherwise efficient document, matching anchor 4 rather than 3.

Actionability

Everything is executable: exact token resolutions ("Background: #0F172A, Surface: #1E293B"), exact spacing values ("Section spacing: 96px"), a complete fill-in DESIGN.md template, concrete preview requirements (primary button, card, text input as live HTML), and a scripted clarification prompt for unrecognized values. This instruction-only skill provides fully concrete, copy-ready guidance covering the common cases, matching anchor 5.

Workflow Clarity

A clear 5-step sequence (accept input → validate dimensions → generate DESIGN.md → generate preview → report defaults) with explicit validation checkpoints: prompting for clarification on unrecognized values, asking the user before overwriting an existing DESIGN.md, and reporting unspecified dimensions with the rule that selected each default. Feedback loops for error recovery are present and there are no unvalidated destructive or batch operations, matching anchor 5.

Progressive Disclosure

No bundle files exist; the 220-line body is well-sectioned with numbered steps and every table (mapping, tokens, defaults) is load-bearing on each run, so inlining is mostly appropriate. Not 5: the document is well over 50 lines and the 58-line DESIGN.md template and token-resolution table are natural candidates for a references/ file; this is good structure with minor organization gaps, matching anchor 4.

Specificity

"Parse a structured design brief written in I-Lang protocol format into a concrete design spec" names the domain and one concrete action, and the six explicit dimensions (palette, typography, layout, mood, density, constraints) add concreteness, but it omits the actual outputs (DESIGN.md, brief-preview.html) and downstream actions. This matches anchor 3 (1-2 concrete actions, not comprehensive) rather than 4, which requires only minor coverage gaps.

Completeness

The "what" is clear (parse I-Lang brief into a concrete design spec with explicit dimensions) and explicit trigger guidance is present via the keyword list, so it is not capped at 3. Not 5 because the "when" is a bare keyword list rather than an explicit use-condition clause ("Use when the user asks for..."), leaving it slightly less contextualized than the anchor-5 pattern.

Trigger Term Quality

Trigger keywords "design brief", "create a design brief", "ilang brief", "structured brief" are natural phrases a user would plausibly say, giving good coverage. Not 5 because common synonyms and variants (e.g., "design spec", "style brief", "design requirements") are missing.

Distinctiveness Conflict Risk

"ilang brief" and "structured brief" are highly niche triggers, and "design brief" scopes to a distinct planning task with minimal overlap with general design or document skills. This matches anchor 5 (clear niche, distinct triggers, minimal conflict risk).