Official MCP RegistryListed
TheDesignAgent
A design agent in your coding agent's loop: briefs each screen, reviews UX and visual quality.
First seen 3 Oct 2026. Evidence as of 6 Oct 2026.
3
Tools
From an anonymous probe
1
Source listings
Each with its own history
10
Recorded changes
Since first seen
Tools
| Tool | Description | Behaviour |
|---|---|---|
| Discover | Get a build brief calibrated to your project, persona, and the specific screen you're building. Call this BEFORE building any screen. Returns: - The active Job-to-be-Done for the task - Relevant heuristics, cognitive guidance, and patterns from the corpus - A focused build brief (~600 tokens) to inject into your build context CALL LIFECYCLE: - First call for a new project (no project_id): returns _meta.tda_status='setup_required' with an extraction task. Scan the repo's schema/types/migrations (or, with no repo, ask the user for a short product description as the task explains) and resubmit with project_model populated. - Subsequent calls: send ONLY task + project_id. project_model is cached server-side from the first call; resending it wastes ~2–4k tokens per call and re-runs validation. Resend project_model ONLY when a response returns _meta.tda_status='setup_required' or 'model_stale'. Use project_id from .thedesignagent or memory across calls. Pass repo_hash (SHA256 of git remote origin URL) only as a fallback if no project_id is known yet. | Changes data |
| Ux | Evaluate a built UI artifact for JTBD fit, heuristic compliance, cognitive load, and pattern conformance. Call this AFTER building a screen. TheDesignAgent scores: - Heuristics: violations against Nielsen's heuristics + project-specific anti-patterns - Cognitive: load profile against the stored persona - Patterns: conformance to established project pattern decisions - JTBD fit: does the artifact serve the resolved job? Returns ux_score (0–10) + findings + prioritised recommendations. Stores new anti-patterns to project context — future builds benefit automatically. | Changes data |
| Visual | Evaluate a built UI artifact for visual design quality — brand compliance, visual cognitive load, and aesthetic quality. Pass render_url to review a real screenshot. This hosted server screenshots public pages and preview deploys (pass vercel_bypass_token for a protected Vercel preview). It cannot reach localhost or private networks: for those, it returns instructions for the local MCP server. With no render_url, the review runs from the artifact code alone. If the page redirects to login, no review runs and nothing is charged. | Changes data |
Change history
- Visual: title changed
- Visual: input schema changed
- Visual: annotations changed
- Ux: title changed
- Ux: input schema changed
- Ux: annotations changed
- Discover: title changed
- Discover: input schema changed
- Discover: annotations changed
- Listed (registry)
| Source | Listing | First seen | Last seen | Versions |
|---|---|---|---|---|
| Official MCP Registry | ai.thedesignagent/mcp | 3 Oct 2026 | 6 Oct 2026 | 1 |