Lists multiple specific concrete actions: 'pick a display, window, or screen region', 'start/stop recording on demand', 'Produces MP4 with sensible defaults', 'Pairs with demo-narrate for voice-over'. Very clear about what it does.

Clearly answers both 'what' (record screen to video, guided capture setup, pick display/window/region, produces MP4) and 'when' (explicit 'Triggers on:' clause with comprehensive trigger terms).

Excellent coverage of natural trigger terms: 'screencast, record screen, screen recording, capture screen, record window, record region, start recording, screen capture video'. These are terms users would naturally say when wanting this functionality.

Very distinct niche — screen recording is a specific capability unlikely to overlap with other skills. The mention of ffmpeg, MP4 output, and specific recording targets (display, window, region) make it clearly distinguishable. The pairing note with 'demo-narrate' further clarifies its role.

The content is mostly efficient but has some verbosity — e.g., the full explanation of how to offer screen dimensions as reference ('Your main display is 2560x1440. Top-left is 0,0.') and some conversational guidance that could be tighter. The script-locating bash block is useful but somewhat lengthy.

Every step includes concrete, executable bash commands with specific flags and options. The commands are copy-paste ready, flags are documented with defaults, and the workflow covers all recording scenarios with exact syntax.

The workflow is clearly sequenced (deps → choose target → confirm & start → stop) with explicit validation at each step (check deps output, confirm before starting, check status). Edge cases are handled with specific recovery actions (dead process, already recording, cancelled picker).

The skill provides a clear overview with well-organized sections, keeps the main content focused on the workflow, and appropriately references a separate REFERENCE.md for macOS picker details and advanced topics. One level deep, clearly signaled.