Extraction fix: the anti-hallucination check (a claim's verbatim_quote must appear in the
source window) was too brittle against auto-captions — fragmented segments joined with
newlines meant a valid quote spanning a join was dropped (0 claims on a 623-segment captions
transcript). Now whitespace-normalized matching (_norm + _quote_supported, ~40-char prefix):
the SAME transcript yields 6 real claims (WETG +160% reverse-split+news; 4 AURC trade claims
with prices; a rejection concern), each quote verifiably present. Whisper output is cleaner
still; this just makes the captions fallback usable too.
- tests/unit/test_youtube_extraction.py: 5 pure-helper tests (norm, quote-support across joins,
hallucination rejection, verbatim-quote-mandatory drop, chunk time-spans).
- youtube_claims/momentum-transcripts.service: reboot-surviving systemd user unit (Restart=always,
loads secrets from .env; Whisper option A/CPU, env-flippable to B/GPU).
END-TO-END VERIFIED (captions path, no ffmpeg): detection -> claim -> transcribe -> extract ->
6 claim rows in Postgres. Full Whisper path needs `sudo apt install ffmpeg`, then
`systemctl --user enable --now momentum-transcripts` to process the 11-video backlog at
Whisper quality + poll for new uploads.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
