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New Homebrew Cask

Turns an app URL into a validated Homebrew Cask and walks you all the way to a submitted pull request.

Dev & CodingAdvanced★ 461⑂ 37AI score 7/10Last updated: Aug 23, 2026

What it does

  • Takes a download URL (or just an app name / homepage) and orchestrates the full homebrew-cask packaging workflow.
  • Six-step pipeline: ① pre-flight suitability check with REJECT/CAUTION verdicts ② download + SHA256 + metadata extraction (version, bundle ID, min macOS, architecture, auto-update framework/appcast) ③ livecheck strategy recommendation ④ cask file authoring ⑤ testing via test-cask.sh (audit/style/livecheck) plus real install, launch, brew createzap zap discovery and uninstall ⑥ PR submission.
  • Each step is delegated to a dedicated sub-agent (pre-flight-checker, app-inspector, livecheck-advisor, cask-writer, pr-submitter), tracked in a task list so you can resume from a failed step.
  • References the official Homebrew docs (Acceptable-Casks, Cask-Cookbook, Brew-Livecheck) for rule details.

Who it's for

  • Contributors adding new apps to homebrew-cask.
  • Developers maintaining a personal or company tap who write cask files repeatedly.
  • Anyone tired of re-reading the Cask Cookbook and livecheck strategy rules.

Examples

  1. "Make a homebrew cask from this DMG link" → suitability check, checksum and version extraction, cask generated, brew audit/brew style cleaned up.
  2. Unversioned URL like App.dmg → the livecheck advisor hunts for a versioned URL in an appcast/release feed, or tests run with --skip-livecheck.
  3. After install and launch, brew createzap surfaces leftover preference paths so a proper zap stanza is added before the PR is opened.

· · · Install guide · · ·

Try it now, no install

Paste this into Claude to use the skill without installing anything.

Read the instructions in this file and follow them to help me:
https://raw.githubusercontent.com/malob/nix-config/HEAD/configs/claude/plugins/homebrew/skills/new-cask/SKILL.md

What I want: (describe your task here)

If Claude can't open the link, open it yourself and paste the contents instead.

↓ If it works for you, download the ZIP below and install it. Then it runs on its own — no pasting each time.

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

Let Claude do it — paste this into Claude Code

Install the skill I found on Claude Skill Mart.
Copy the configs/claude/plugins/homebrew/skills/new-cask folder from the GitHub repo malob/nix-config into my ~/.claude/skills/new-cask/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/malob/nix-config.git /tmp/nix-config && cp -r /tmp/nix-config/configs/claude/plugins/homebrew ~/.claude/plugins/homebrew

⚠ This is a third-party skill. Check the source repository before installing.

  1. Make sure you're on macOS with Homebrew installed: brew --version.
  2. Install GitHub CLI for the PR step: brew install gh, then gh auth login.
  3. Clone the repo: git clone https://github.com/malob/nix-config.git /tmp/nix-config
  4. Copy the whole plugin (skill + agents + scripts): cp -r /tmp/nix-config/configs/claude/plugins/homebrew ~/.claude/plugins/homebrew
    • Copying only the skill folder will not work: it depends on the homebrew:* sub-agents and scripts/test-cask.sh.
  5. Make the scripts executable: chmod +x ~/.claude/plugins/homebrew/scripts/*.sh
  6. Restart Claude Code and ask something like "create a homebrew cask for this URL".
  7. Note that step 5 genuinely installs and uninstalls the app on your Mac — prefer a test machine or account.
View source on GitHub ↗License: MIT