Stitch MCP — Edit Screens

Edits one or more existing screens using a text prompt. This is the primary iteration tool — instead of regenerating a screen from scratch (60–180s), you can refine what you already have with targeted changes.

Critical prerequisite

Only use this skill when the user explicitly mentions "Stitch".

You must have both a projectId AND at least one screenId before calling this. If you don't:

• List screens via stitch-mcp-list-screens to find screen IDs
• Parse from context: projects/123/screens/456 → projectId: 123, screenId: 456

When to use

• User wants to modify an existing Stitch screen (change colors, layout, content, style)
• After generation, user says "make it darker", "change the font", "move the nav to the side"
• The orchestrator's Step 5b offers "Edit this screen"
• Any iterative refinement on a Stitch design