bretfisher/skills · skills/screencapture/SKILL.md

screencapture skillA

screencapture is agent-read markdown (skill) from bretfisher/skills: 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 if .

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add bretfisher/skills/screencapture@git:20260908.f9b9d96
Exact content
mdr add bretfisher/skills/screencapture@sha256:bbf889172cab76f6

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_wuojkpxlo4m54eeu.svg)](https://markdownregistry.com/a/art_wuojkpxlo4m54eeu)

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Versions

versioncommittedcommitsizeaudit
git:20260908.f9b9d96 latest2026-09-08 f9b9d96 7,602 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (7602 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

GitHub

bretfisher/skills · 17 stars · license MIT · pushed 2026-09-14 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_wuojkpxlo4m54eeu
GET https://markdownregistry.com/api/v1/resolve?ref=bretfisher/skills/screencapture
GET https://markdownregistry.com/api/v1/blob/bbf889172cab76f668231e2007c04c6c16cd4e21a7e18f95481477cc9cd9fde1

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.