Conciseness

The body is lean bullet-point prose that assumes Claude's competence and avoids explaining known concepts, with only mild redundancy where the 'Key Principles' section restates points already made in 'The Process' (one question at a time, 2-3 approaches, incremental validation).

Actionability

Concrete, executable guidance throughout: specific numbers ('200-300 words', '2-3 approaches', 'one question per message'), a concrete output path ('docs/plans/YYYY-MM-DD-<topic>-design.md'), and named companion skills to invoke, with only minor gaps in the implementation handoff.

Workflow Clarity

A clearly sequenced multi-step process (Understanding → Exploring approaches → Presenting the design → After the design) with explicit validation checkpoints ('ask after each section whether it looks right so far') and feedback loops ('be ready to go back and clarify').

Progressive Disclosure

A short (~50 line), single-purpose skill with no external bundle files needed; it is well-organized with clear section headers and appropriately signals companion skills, meeting the simple-skill exception for progressive disclosure.

Specificity

Names the design domain and lists several specific trigger situations ('creating features, building components, adding functionality, or modifying behavior') plus the action 'Explores user intent, requirements and design', but the second-person 'You MUST use this' triggers the -1 specificity penalty per the rubric.

Completeness

Explicitly answers both what ('Explores user intent, requirements and design before implementation') and when ('You MUST use this before any creative work - creating features...') with concrete trigger phrases.

Trigger Term Quality

Good natural keyword coverage ('creating features', 'building components', 'adding functionality', 'modifying behavior', 'design') that users would actually say, with a few synonyms (e.g. 'brainstorm', 'plan') missing.

Distinctiveness Conflict Risk

Carves a clear pre-implementation design/brainstorming niche distinct from coding skills, though 'any creative work' and 'modifying behavior' are broad enough to create minor overlap with general planning skills.