mac-debug SKILL.md skillA
mac-debug 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-debug@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-debug/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260904.ee0eb1b, committed Sep 4, 2026
- First version recorded
- Sep 4, 2026
- Size
- 4,285 bytes
- Repository stars
- 9
- License
- MIT
Diagnose a Mac automation that is failing, especially one failing silently. Use when a click does nothing, typing does not appear, the accessibility tree is empty, an AppleScript hangs or errors, coordinates land in the wrong place, or something that worked before stopped working.
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
# Debugging Mac automation Most of these fail with no error, which is what makes them expensive. Diagnose before you retry, and **never respond to a failure by escalating to a screenshot.** A failing layer-3 read almost always means one specific fixable thing. ## Triage ```bash chewie doctor # grants, host app, tools chewie doctor --secure-input # is the keyboard being blocked ``` ## By symptom ### Typing does nothing, no error **Secure Input.** A password field has focus somewhere, and macOS discards synthetic keystrokes with no error. It is a process-global reference-counted flag, so one stuck app starves the whole system. ```bash ioreg -l -w 0 -d 1 -k IOConsoleUsers | grep -o 'kCGSSessionSecureInputPID"=[0-9]*' ``` Nonzero is the pid holding it. Fix: `open -a Finder`, retry. If an app is stuck, focus and unfocus it, or quit it. ### Clicks do nothing from inside an app **App Sandbox** silently blocks `CGEvent.post`. No error. No fix inside the sandbox; this is why every serious macOS automation tool ships outside the App Store. ### Accessibility tree is empty or all elements unnamed …
Read the whole file at its exact version.
How to install
mdr add calebnewtonusc/chewbacca/mac-debug@sha256:80132c0091511660The 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_454d3r6mdsl3ntjj)
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 | 4,285 B | A | view · diff |
| git:20260904.25a1d94 | 2026-09-04 | 25a1d94 | 4,266 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 (4285 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_454d3r6mdsl3ntjj GET https://markdownregistry.com/api/v1/resolve?ref=calebnewtonusc/chewbacca/mac-debug GET https://markdownregistry.com/api/v1/blob/80132c009151166074e2dd5868763f99c7b4daf514168e4a89e19ed2e42979c7
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.