Textual Screenshot

Render the real app with Textual's headless test harness, drive it to the requested state, and save the composed terminal as SVG. Prefer this over browser automation or OS-level screenshot tools.

Capture workflow

1. Identify the App class and the shortest trusted local setup that reaches the requested UI.
2. Write a temporary Python script outside the repository. Keep generated screenshots outside the repository unless the user explicitly requests a committed artifact.
3. Start the app with a deterministic terminal size using app.run_test(size=(columns, rows)).
4. Call await pilot.pause() after startup and after every action that changes visible state. Use pilot.press(...) for a realistic interaction path when practical; direct app methods are acceptable for a focused preview.
5. Call app.save_screenshot(output_path) while the desired state is visible. Use an .svg path.
6. Inspect the resulting SVG and confirm its file size is reasonable before sharing it.
7. Delete temporary scripts and captures when they are no longer needed.

Minimal deepagents-code example: