RETIRED 2026-07-15 — the Mux pipeline was replaced by wzrrd-video (fully Cloudflare-native). Use skills/wzrrd-video instead. Kept for historical Mux asset management only. Covers direct uploads, API asset management, webhook event flow, playback embedding, and the Mux CLI. Use when uploading video, creating assets, checking encoding status, embedding playback, or handling Mux webhook events.
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