Agent Skills: Generating Stitch Screens

Generating Stitch Screens

Orchestrate screen generation in Google Stitch using MCP tools. Reads authored prompt files, sends each section to Stitch for generation, and fetches resulting images and code.

Prerequisites

Requires Stitch MCP server (@_davideast/stitch-mcp). If MCP tools are not available, display:

Stitch MCP is not configured.
Run /stitch-setup for guided setup, or see the plugin README for manual configuration.

Never fail silently. Always inform the user if MCP is unavailable.

Typically invoked via /stitch-generate or after prompt authoring with MCP available.

Quick Start

1. Read prompt file from design-intent/google-stitch/{feature}/prompt-v{N}.md
2. Parse sections by --- separators, extracting <!-- Layout: --> and <!-- Component: --> markers
3. Create or select project via MCP (create_project / list_projects)
4. Generate screens — for each section: call generate_screen_from_text with prompt text
5. Fetch images — for each screen: call fetch_screen_image at full resolution, save to {feature}/exports/ (see WORKFLOW.md for URL transformation)
6. Fetch code (optional) — call fetch_screen_code, save to {feature}/code/
7. Extract design context (optional) — call extract_design_context, save design DNA
8. Report — project URL, screen list, file paths

Output Structure

design-intent/google-stitch/{feature}/
├── prompt-v{N}.md              <- Source prompts
├── exports/                    <- Generated images
│   ├── {layout-name}.png
│   ├── {component-1}.png
│   └── {component-2}.png
├── code/                       <- Generated code (optional)
│   ├── {layout-name}/
│   └── {component-1}/
└── design-dna.md               <- Extracted design context (optional)

Section Parsing

Prompt files use --- separators with HTML comment labels:

<!-- Layout: Analytics Dashboard -->
[layout prompt text]

---

<!-- Component: KPI Metrics -->
[component prompt text]

---

<!-- Component: Revenue Chart -->
[component prompt text]

Parse each section independently. Use the label text as the screen name in Stitch.

Error Handling

• Partial failure: If some screens fail to generate, continue with remaining sections and report failures
• Generation timeout: Wait, then retry once. If still pending, report and suggest checking Stitch directly
• Empty result from fetch: Generation may still be in progress — wait briefly and retry

Workflow Details

See WORKFLOW.md for detailed steps, error handling, and retry logic.

Examples

See EXAMPLES.md for end-to-end generation scenarios.

Troubleshooting

See TROUBLESHOOTING.md for MCP-specific issues.