mac-act SKILL.md skillA
mac-act from calebnewtonusc/chewbacca is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add calebnewtonusc/chewbacca/mac-act@git:20260904.ee0eb1bPins git:20260904.ee0eb1b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- calebnewtonusc/chewbacca
- Path
skills/mac-act/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260904.ee0eb1b, committed Sep 4, 2026
- First version recorded
- Sep 4, 2026
- Size
- 2,906 bytes
- Repository stars
- 9
- License
- MIT
Click, type, drag, scroll, press keys, and drive UI on the user's Mac. Use when the user asks to click something, fill in a field, press a shortcut, select a menu item, or perform any action in a Mac app.
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
# Acting on a Mac ## Click Best to worst, in order. ```bash chewie click "@s8f3k2p9:e12" # a ref from a snapshot. use this. chewie click "Sign In" --app Safari # by label chewie click "412,208" # a raw coordinate. last resort. ``` A ref is unambiguous. A label is usually fine. A coordinate is a guess that happens to be right, and it stops being right when the window moves. **Refs are scoped to the snapshot that produced them.** After anything that changes the UI (a sheet opens, a page navigates, a list scrolls, a window resizes), re-snapshot. A stale ref does not error, it clicks the wrong thing. ## Type ```bash chewie type "hello" chewie type "$LONG_TEXT" --paste # clipboard, auto for >200 chars ``` For anything long, use the clipboard. Character-by-character typing is slow and every keystroke is a chance for a dropped event. `peekaboo paste` sets the clipboard, sends Cmd+V, and **restores what the user had copied**, which matters more than it sounds. Better than typing at all, when the app supports it: set the value directly through the tree. ```bash agent-desktop type @s8f3k2p9:e4 "hello" ``` …
Read the whole file at its exact version.
How to install
mdr add calebnewtonusc/chewbacca/mac-act@sha256:e2cf131fec447f08The line at the top of this page pins the label git:20260904.ee0eb1b, 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_pfrussl7jnvb3grk)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, all committed on Sep 4, 2026.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260904.ee0eb1b latest | 2026-09-04 | ee0eb1b | 2,906 B | A | view · diff |
| git:20260904.25a1d94 | 2026-09-04 | 25a1d94 | 2,887 B | A | view |
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 (2906 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
calebnewtonusc/chewbacca · 9 stars · license MIT · pushed 2026-10-03 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_pfrussl7jnvb3grk GET https://markdownregistry.com/api/v1/resolve?ref=calebnewtonusc/chewbacca/mac-act GET https://markdownregistry.com/api/v1/blob/e2cf131fec447f085469006a61f7a2236fb85bf8e3d7ad327f76699a60160d1a
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.