Product Design — Suite anchor
Witness
AI design critique your agents already trust.
Free MCP server + Mac annotation studio — coming Q4 2026
What it does
Two surfaces, one product. The MCP server gives AI coding agents (Claude Code, Cursor, Cline, Aider) the ability to critique any UI they generate — with calibrated taste from a fine-tuned vision model. The Mac annotation studio is the designer-facing review queue: queue UI iterations, capture critique, agree/disagree, build the dataset that makes the next fine-tune even better.
Capabilities
MCP server
Built — free4 tools: review_ui, review_screenshot, check_accessibility, compare_designs. Built; published free at launch.
vllm-mlx + Qwen3-VL-8B
ShippedLocal vision-language model serving. No cloud required.
Figma compare
ShippedDiff a Figma design against the implemented UI.
Training pipeline
Shipped — substantialMLX LoRA fine-tuning, dataset management, export to OpenAI/HF/ORPO.
Annotation studio
Q4 2026Mac app for queueing UI iterations and capturing critique.
Accessibility 11 modes
Q4 2026Color blindness, low vision, motor, cognitive constraints.
Phase 5 fine-tune
Q4 2026First end-to-end LoRA adapter on real annotations.
FastMCP envelope
Q4 2026Shared response shape across labsly MCP servers.
Who it's for
AI agent developers who want their agents to ship UI that's actually usable. Product designers using AI tools to generate iterations who need a structured critique loop. Teams that care about accessibility but don't have the bandwidth for manual audits.
Availability
The MCP server is built and will be free for agents when it is published — it is not on PyPI yet. Pricing for the Mac annotation studio will be published before the App Store listing opens. MCP server details.
Get launch updates
Direct, occasional updates from the person building the apps.