Prototype skill

Skill: Prototype & Research

Requirements

This skill needs the full UX/UI Agent Skills kit: the gates, the references and the design-system library. Install it with npx ux-ui-agent-skills@3.1.0 init or as the Claude Code plugin. npx skills@1.7.6 add copies the skill folder and nothing else. Installed that way, this skill runs in guidance-only mode: no gate runs, so it gives no verdict.

Step 0: is the kit here? Check once: ls ${CLAUDE_SKILL_DIR}/../../../tokens >/dev/null 2>&1 && echo KIT_OK || echo KIT_MISSING On KIT_MISSING, open your reply with: "Guidance-only mode: the UX/UI Agent Skills kit is not installed here, so no gate ran and nothing below is measured." Then work from this file and general practice, under three rules. Do not guess or cite the contents of a kit file you could not open. State no measured number (no contrast ratio, no N/N, no "passes WCAG"): write "not verified" where one would go. End with a line Skipped (kit not installed): that names every gate script this file tells you to run, then the install command above.

Guide work through the right fidelity level with validation.

Steps

1. Read ${CLAUDE_SKILL_DIR}/../../../workflows/prototyping.md (5-level fidelity ladder, journey mapping template, usability-testing script, sample data).
2. Identify the current need and pick the lowest fidelity that answers it. Never skip levels:
   • Content-first (info needs) → Wireframe (layout/nav) → Low-fi (task completion) → High-fi (visual/a11y) → Code (feasibility/perf).
3. For flows: produce a user-journey map with decision points, error paths, and edge cases.
4. For validation: define the usability test (tasks, success criteria, 5-user rule) using the script.
5. High-fi/code steps pull tokens (${CLAUDE_SKILL_DIR}/../../../tokens/*), components (${CLAUDE_SKILL_DIR}/../../../components/*), taste (${CLAUDE_SKILL_DIR}/../../../taste/*), and a11y (${CLAUDE_SKILL_DIR}/../../../accessibility/*).

Output

The artifact at the chosen fidelity + an explicit "what we validate next" plan.

Verification (before declaring done)

• The fidelity matches the question being answered; no level skipped.
• Flows include decision points, error paths, and edge cases (empty/loading/overflow), not just the happy path.
• A concrete validation step is named (tasks + success criteria), not "test later".
• High-fi/code artifacts pass the same token + a11y bar as design-code (no hardcoded values, contrast, states).