---
name: screenshot
description: 'Use when the user explicitly asks for a desktop or system screenshot (full screen, specific app or window, or a pixel region), or when tool-specific capture capabilities are unavailable and an OS-level capture is needed.'
zh_description: "用于截图、屏幕捕获、视觉核查和界面证据收集。"
version: "1.0.0"
author: "seaworld008"
source: "in-house"
source_url: ""
tags: '["screenshot"]'
created_at: "2026-03-04"
updated_at: "2026-03-20"
quality: 5
complexity: "intermediate"
---
# Screenshot Capture
Follow these save-location rules every time:
1) If the user specifies a path, save there.
2) If the user asks for a screenshot without a path, save to the OS default screenshot location.
3) If Codex needs a screenshot for its own inspection, save to the temp directory.
## Tool priority
- Prefer tool-specific screenshot capabilities when available (for example: a Figma MCP/skill for Figma files, or Playwright/agent-browser tools for browsers and Electron apps).
- Use this skill when explicitly asked, for whole-system desktop captures, or when a tool-specific capture cannot get what you need.
- Otherwise, treat this skill as the default for desktop apps without a better-integrated capture tool.
## macOS permission preflight (reduce repeated prompts)
On macOS, run the preflight helper once before window/app capture. It checks
Screen Recording permission, explains why it is needed, and requests it in one
place.
The helpers route Swift's module cache to `$TMPDIR/codex-swift-module-cache`
to avoid extra sandbox module-cache prompts.
```bash
bash <path-to-skill>/scripts/ensure_macos_permissions.sh
```
To avoid multiple sandbox approval prompts, combine preflight + capture in one
command when possible:
```bash
bash <path-to-skill>/scripts/ensure_macos_permissions.sh && \
python3 <path-to-skill>/scripts/take_screenshot.py --app "Codex"
```
For Codex inspection runs, keep the output in temp:
```bash
bash <path-to-skill>/scripts/ensure_macos_permissions.sh && \
python3 <path-to-skill>/scripts/take_screenshot.py --app "<App>" --mode temp
```
Use the bundled scripts to avoid re-deriving OS-specific commands.
## macOS and Linux (Python helper)
Run the helper from the repo root:
```bash
python3 <path-to-skill>/scripts/take_screenshot.py
```
Common patterns:
- Default location (user asked for "a screenshot"):
```bash
python3 <path-to-skill>/scripts/take_screenshot.py
```
- Temp location (Codex visual check):
```bash
python3 <path-to-skill>/scripts/take_screenshot.py --mode temp
```
- Explicit location (user provided a path or filename):
```bash
python3 <path-to-skill>/scripts/take_screenshot.py --path output/screen.png
```
- App/window capture by app name (macOS only; substring match is OK; captures all matching windows):
```bash
python3 <path-to-skill>/scripts/take_screenshot.py --app "Codex"
```
- Specific window title within an app (macOS only):
```bash
python3 <path-to-skill>/scripts/take_screenshot.py --app "Codex" --window-name "Settings"
```
- List matching window ids before capturing (macOS only):
```bash
python3 <path-to-skill>/scripts/take_screenshot.py --list-windows --app "Codex"
```
- Pixel region (x,y,w,h):
```bash
python3 <path-to-skill>/scripts/take_screenshot.py --mode temp --region 100,200,800,600
```
- Focused/active window (captures only the frontmost window; use `--app` to capture all windows):
```bash
python3 <path-to-skill>/scripts/take_screenshot.py --mode temp --active-window
```
- Specific window id (use --list-windows on macOS to discover ids):
```bash
python3 <path-to-skill>/scripts/take_screenshot.py --window-id 12345
```
The script prints one path per capture. When multiple windows or displays match, it prints multiple paths (one per line) and adds suffixes like `-w<windowId>` or `-d<display>`. View each path sequentially with the image viewer tool, and only manipulate images if needed or requested.
### Workflow examples
- "Take a look at <App> and tell me what you see": capture to temp, then view each printed path in order.
```bash
bash <path-to-skill>/scripts/ensure_macos_permissions.sh && \
python3 <path-to-skill>/scripts/take_screenshot.py --app "<App>" --mode temp
```
- "The design from Figma is not matching what is implemented": use a Figma MCP/skill to capture the design first, then capture the running app with this skill (typically to temp) and compare the raw screenshots before any manipulation.
### Multi-display behavior
- On macOS, full-screen captures save one file per display when multiple monitors are connected.
- On Linux and Windows, full-screen captures use the virtual desktop (all monitors in one image); use `--region` to isolate a single display when needed.
### Linux prerequisites and selection logic
The helper automatically selects the first available tool:
1) `scrot`
2) `gnome-screenshot`
3) ImageMagick `import`
If none are available, ask the user to install one of them and retry.
Coordinate regions require `scrot` or ImageMagick `import`.
`--app`, `--window-name`, and `--list-windows` are macOS-only. On Linux, use
`--active-window` or provide `--window-id` when available.
## Windows (PowerShell helper)
Run the PowerShell helper:
```powershell
powershell -ExecutionPolicy Bypass -File <path-to-skill>/scripts/take_screenshot.ps1
```
Common patterns:
- Default location:
```powershell
powershell -ExecutionPolicy Bypass -File <path-to-skill>/scripts/take_screenshot.ps1
```
- Temp location (Codex visual check):
```powershell
powershell -ExecutionPolicy Bypass -File <path-to-skill>/scripts/take_screenshot.ps1 -Mode temp
```
- Explicit path:
```powershell
powershell -ExecutionPolicy Bypass -File <path-to-skill>/scripts/take_screenshot.ps1 -Path "C:\Temp\screen.png"
```
- Pixel region (x,y,w,h):
```powershell
powershell -ExecutionPolicy Bypass -File <path-to-skill>/scripts/take_screenshot.ps1 -Mode temp -Region 100,200,800,600
```
- Active window (ask the user to focus it first):
```powershell
powershell -ExecutionPolicy Bypass -File <path-to-skill>/scripts/take_screenshot.ps1 -Mode temp -ActiveWindow
```
- Specific window handle (only when provided):
```powershell
powershell -ExecutionPolicy Bypass -File <path-to-skill>/scripts/take_screenshot.ps1 -WindowHandle 123456
```
## Direct OS commands (fallbacks)
Use these when you cannot run the helpers.
### macOS
- Full screen to a specific path:
```bash
screencapture -x output/screen.png
```
- Pixel region:
```bash
screencapture -x -R100,200,800,600 output/region.png
```
- Specific window id:
```bash
screencapture -x -l12345 output/window.png
```
- Interactive selection or window pick:
```bash
screencapture -x -i output/interactive.png
```
### Linux
- Full screen:
```bash
scrot output/screen.png
```
```bash
gnome-screenshot -f output/screen.png
```
```bash
import -window root output/screen.png
```
- Pixel region:
```bash
scrot -a 100,200,800,600 output/region.png
```
```bash
import -window root -crop 800x600+100+200 output/region.png
```
- Active window:
```bash
scrot -u output/window.png
```
```bash
gnome-screenshot -w -f output/window.png
```
## Error handling
- On macOS, run `bash <path-to-skill>/scripts/ensure_macos_permissions.sh` first to request Screen Recording in one place.
- If you see "screen capture checks are blocked in the sandbox", "could not create image from display", or Swift `ModuleCache` permission errors in a sandboxed run, rerun the command with escalated permissions.
- If macOS app/window capture returns no matches, run `--list-windows --app "AppName"` and retry with `--window-id`, and make sure the app is visible on screen.
- If Linux region/window capture fails, check tool availability with `command -v scrot`, `command -v gnome-screenshot`, and `command -v import`.
- If saving to the OS default location fails with permission errors in a sandbox, rerun the command with escalated permissions.
- Always report the saved file path in the response.