screencapture-mac SKILL.md skillA
screencapture-mac from bretfisher/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add bretfisher/skills/screencapture-mac@git:20261104.e27cb65Pins git:20261104.e27cb65 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- bretfisher/skills
- Path
plugins/utils/skills/screencapture-mac/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261104.e27cb65, committed Nov 4, 2026
- Size
- 7,746 bytes
- Repository stars
- 21
- License
- MIT
Captures the user's macOS screen, a window, or a region with the built-in `screencapture` CLI, then reads the image so the agent can see what the user sees. Use it when the user asks to check how a native macOS app looks (SwiftUI, AppKit, Electron, Qt, Tk, Java Swing), verify a window rendered correctly after a build or code change, diagnose a visual bug they describe in a desktop app, confirm a menu, dialog, or layout state, or asks "can you see this?" about anything outside a browser, even…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# screencapture-mac macOS ships `screencapture`, a fast CLI for grabbing the screen. Use it to _see_ what the user sees when working on native GUI software. Web apps belong in a browser-automation tool; this skill is for everything else (SwiftUI/AppKit, Electron, Java/Swing, Qt, Tk, games, system UI, Finder, Xcode, etc.). ## Core workflow 1. **Capture** to the scratch directory with a unique filename. Pick the directory in this order: the session scratch directory when the host names one in its instructions (Claude Code calls it the scratchpad directory), else `$TMPDIR`, else `/tmp`. A session directory is isolated from other sessions and from the user's project, so files there cannot collide or clutter shared space. Set `OUT` to that path and use it in every command below. 2. **Read** the image with the Read tool — Agent is multimodal and will see the PNG inline. 3. **Delete** the file immediately after reading. The user wants temp space kept clean; never leave screenshots lying around. Filename convention: `$OUT/screencap-$(date +%s).png`. The timestamp prevents collisions if you capture multiple times in one task. ## Picking the right mode …
Read the whole file at its exact version.
How to install
mdr add bretfisher/skills/screencapture-mac@sha256:902230aeb2094198The line at the top of this page pins the label git:20261104.e27cb65, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_vazlcmp33xsxcxjc)
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Versions
The registry has recorded 1 version of this file, committed on Nov 4, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (7746 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
bretfisher/skills · 21 stars · license MIT · pushed 2026-11-07 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_vazlcmp33xsxcxjc GET https://markdownregistry.com/api/v1/resolve?ref=bretfisher/skills/screencapture-mac GET https://markdownregistry.com/api/v1/blob/902230aeb209419873652f437329a625bb9dab87e3cc9c77dac09524feaa8fa7
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.