Developer experience is measured in sighs, and the sighs are recorded. Every "integrating X in 20 minutes" video, every live-coding stream touching your API or a rival's, is a DX audit performed in public: where the developer pauses to re-read docs, where they hit the error that the error message doesn't explain, where they say "okay, that's weird, but fine" — the exact moments that decide whether an integration ships or gets abandoned for the competitor with the smoother quickstart.

DevRel teams run internal DX audits annually; the ecosystem runs them continuously. The recordings are a map of every stumble, in sequence, across your API surface and everyone else's.

deep_search finds the audit tape: integration walkthroughs, quickstart attempts and live-coding sessions touching your API and your rivals' — transcript-searched, so "videos where developers hit problems with <API area>" lands on the stumbles.

library_import_youtube_video and get_youtube_transcript make the tape analyzable: import the sessions, pull the transcripts, and read the friction in order — first confusion, first workaround, the docs-checking loop, the error-message dead ends. The sequence matters: DX failures cascade, and the transcript preserves the cascade. The output is a stumble map per API surface — yours for fixing, theirs for your quickstart's competitive positioning.