Add defaultmic extension

[Alukkart]

Description

Screencast

Checklist

• I read the extension guidelines
• I read the documentation about publishing
• I ran npm run build and tested this distribution build in Raycast
• I checked that files in the assets folder are used by the extension itself
• I checked that assets used by the README are placed outside of the metadata folder

[raycastbot]

Congratulations on your new Raycast extension! 🚀

We're currently experiencing a high volume of incoming requests. As a result, the initial review may take up to 10-15 business days.

Once the PR is approved and merged, the extension will be available on our Store.

[greptile-apps]

Greptile Summary

This PR adds the Default Mic extension, providing two Raycast commands — Select Default Mic and Toggle Mic Lock — to manage the macOS system input device, with optional persistence via a launchd LaunchAgent backed by switchaudio-osx.

All issues raised in previous review rounds have been addressed:

• isExecutable now correctly uses constants.X_OK instead of only F_OK
• Both load() paths pass an onInstallStart toast callback to ensureSwitchAudioSourceInstalled, as does the toggle() enable path
• launchctl load/unload replaced with modern bootstrap/bootout
• disableMicLock now deletes the plist file, preventing silent re-enable after reboot
• List.EmptyView with Install/Refresh actions is present for the zero-device state
• Unused @raycast/utils dependency removed; Communication category removed
• eslint.config.js matches the repository's standard CommonJS require pattern

Confidence Score: 5/5

• All previous review concerns have been resolved; no new critical issues found — safe to merge.
• Every issue flagged across prior review rounds has been addressed: X_OK permission check, toast feedback during silent installs, modern launchctl API, plist cleanup on disable, empty-state UI, unused dependency removal, and category correction. The code follows established Raycast patterns and no new logic, security, or API concerns were identified during this pass.
• No files require special attention.

Important Files Changed

Filename	Overview
extensions/defaultmic/src/lib/audio.ts	Binary resolution and auto-install logic; previous issues (X_OK check, onInstallStart callback, installPromise guard) are all correctly implemented.
extensions/defaultmic/src/lib/lock.ts	LaunchAgent management uses modern bootstrap/bootout; disableMicLock now deletes the plist file to prevent re-enable on reboot.
extensions/defaultmic/src/select-default-mic.tsx	Device list command with toast feedback during auto-install, List.EmptyView for zero-device state, and proper preferred/lock state handling.
extensions/defaultmic/src/toggle-mic-lock.tsx	Toggle command correctly passes onInstallStart to ensureSwitchAudioSourceInstalled in both load() and toggle() paths for full toast coverage.
extensions/defaultmic/package.json	Correct categories (Media, System), no unused @raycast/utils dependency, macOS-only platform declared.

_{Reviews (3): Last reviewed commit: "Update defaultmic extension" | Re-trigger Greptile}