seer-skill
Visual feedback capture skill for macOS app windows.
Support
- macOS only
Demo
Full video: assets/seer-demo.mov
Features
- Precise capture of a visible macOS app window
- Window video capture + frame extraction
- ffmpeg-backed full-display recording with manual stop for long QA runs
- UI mockups by annotating screenshots (arrow, rectangle, text)
- Excalidraw scene generation (
.excalidraw) from natural language prompts - Scripted visual loop support (diffs, baselines, reports)
- Organized output layout under
.seer/with latest artifacts
Install
Codex (skill-installer UI):
- Run
$skill-installer - Ask: install GitHub repo
w00ing/seer-skillpathseer
Claude Code (plugin):
/plugin marketplace add w00ing/seer-skill/plugin install seer-skill@seer- If the marketplace was previously added, run
/plugin marketplace update seerbefore installing to pick up updates. - If you see an SSH clone error, add the marketplace via HTTPS instead:
/plugin marketplace add https://github.com/w00ing/seer-skill.git
- If the marketplace was previously added, run
Manual (Codex):
mkdir -p ~/.codex/skills
git clone https://github.com/w00ing/seer-skill.git /tmp/seer-skill
rsync -a /tmp/seer-skill/skills/seer/ ~/.codex/skills/seer/
Manual (Claude Code):
mkdir -p ~/.claude/skills
git clone https://github.com/w00ing/seer-skill.git /tmp/seer-skill
rsync -a /tmp/seer-skill/skills/seer/ ~/.claude/skills/seer/
Use
- Skill name:
seer - Script:
skills/seer/scripts/capture_app_window.sh - Script:
skills/seer/scripts/record_app_window.sh - Script:
skills/seer/scripts/record_screen.sh - Script:
skills/seer/scripts/extract_frames.sh - Script:
skills/seer/scripts/summarize_video.sh - Script:
skills/seer/scripts/type_into_app.sh - Script:
skills/seer/scripts/mockup_ui.sh - Script:
skills/seer/scripts/excalidraw_from_text.py - Script:
skills/seer/scripts/annotate_image.py - Default output:
.seer/capture/app-window-<app>-YYYYMMDD-HHMMSS-<pid>-<rand>.png - Set
SEER_OUT_DIRto change default output root (falls back toSEER_TMP_DIRfor legacy behavior) - Installed paths (Codex/Claude Code):
~/.codex/skills/seer/scriptsor~/.claude/skills/seer/scripts
Window capture
Capture the frontmost app window (or a named process) as a precise PNG. Output is organized under .seer/capture/ with app‑slugged filenames for easy tracking.
Window recording + frames
Record a window region to .mov and extract frames for granular analysis.
Screen recording
Record the full screen (or a specified region/display) to .mov, or use ffmpeg for direct .mp4 capture with manual stop.
Video summary (representative frames)
Extract representative frames from a video using scene detection, keyframes, or fixed FPS. Optionally render a contact sheet or preview GIF.
Summary flags (when using record_app_window.sh --summary):
--summary-mode <scene|fps|keyframes>: selection strategy (default:scene)--summary-scene <threshold>: scene-change sensitivity (default:0.30)--summary-fps <n>: sampling rate forfpsmode (default:2)--summary-max <n>: cap frame count (default:24,0disables cap)--summary-out <dir>: output folder--summary-sheet: createsheet.pngcontact sheet--summary-sheet-cols <n>: contact sheet columns (default: auto)--summary-gif: createpreview.gif--summary-gif-width <px>: GIF max width (default:640)
UI mockups (annotations)
Create lightweight UI mockups by drawing arrows, rectangles, and text on a capture using a JSON spec. Output images + spec + metadata are saved together under .seer/mockup/.
Excalidraw wireframes (NL → .excalidraw)
Generate an Excalidraw scene file from a simple, structured natural-language prompt. By default, it will use a bundled UI component library (if present) to render nicer headers/inputs/buttons/tabs automatically.
Docs: docs/excalidraw-wireframing.md
Visual diff loop
Maintain baselines and compare current UI to previous snapshots with diffs and JSON reports. Useful for quick visual regressions or confirming UI changes.
Organized artifacts
Every mockup run stores capture, spec, output, and metadata, plus latest-* convenience copies per app slug for fast access.