Screenshots

Screenshots

runtime/cli/screenshot.mjs

node <skill-root>/runtime/cli/screenshot.mjs <prototype.html> [--out=dir] [--browser=exe] [--width=1440] [--height=900] [--snapshot=path]

• Default snapshot: <html-dir>/prototype/notes.snapshot.js; default output: <html-dir>/screenshots/.
• One PNG per id in snapshot.scenarios (must be declared explicitly) → <scene-id>.png.
• URL: file://…/prototype.html?scene=<id>&collapsed=1&product-only=1 — rail, connectors, Mark and author UI hidden.
• Uses headless Edge/Chrome (--headless=new, scale factor 1, 2 s virtual time budget). If none is found, pass --browser=.
• Scenario ids must be safe filenames (1–120 chars, no <>:"/\|?*, no trailing dot/space, no Windows device names).
• On any failure, already-written PNGs are kept and the process returns failure.

Reference: screenshots.md.