macos-screen-recorder (sck-record)

This skill wraps sck-record (compiled from sck-record.swift, built by setup-machine or swiftc -O sck-record.swift -o sck-record), which records the main display plus system audio via ScreenCaptureKit:

./sck-record <out.mp4> <seconds>

Its one true differentiator is capturing system audio from the CLI with zero install - no BlackHole or other loopback virtual device, no sudo, just the standard Screen Recording permission granted once to whatever app shells out. It is explicitly not positioned as a general "better than OBS/Screen Studio" tool; it fills exactly the headless-CLI-with-system-audio gap that QuickTime and screencapture -v can't cover without a virtual audio device.

Use it when scripting a screen recording with system sound on macOS from the CLI - demos, captures, voice-demo recording - the case QuickTime and screencapture -v can't handle without a virtual audio device. It is macOS-only, depends on ScreenCaptureKit and the user's Screen Recording permission, and by itself provides no editing, auto-zoom, captions, or social-format polish.

Input is an output path and a duration in seconds; output is an mp4 with the main display and system audio captured. sck-record is the raw capture primitive - it records, nothing more. For post-production polish (idle speed-up, auto-zoom, keystroke chips, smoothed cursor, vertical export), it pairs with the separate screenstudio-alternative-skill: record with sck-record --no-cursor <out.mp4> <seconds>, then run that skill's post-production pass on the resulting mp4. Auto-zoom and keystroke overlays additionally need an input-event log captured during recording, which the pairing skill supplies - sck-record's pixels alone cover idle speed-up, cursor smoothing, and vertical export, but cannot reconstruct keystrokes or precise click metadata on their own.

Developers on macOS who need to script a screen recording with system audio from the command line - for demos, tutorials, or voice-over captures - without installing a virtual audio loopback device or granting sudo. MIT licensed, by Conner K Ward.