Provenance Record

Clean, well-structured News piece (485 words, within the 400-1200 News range). Overview/What We Know/What We Don't Know/Analysis structure is clear and appropriately conservative, openly flagging unknowns (Jumper's Anthropic role, start date, whether the exits signal broader attrition).

All three source snapshots read from disk and verified. source-0.html.gz (TechCrunch, allowlisted, status 200): confirms the headline/lead — Jumper announced Friday he is leaving Google DeepMind for rival Anthropic after 'nearly 9 years'; both Jumper quotes are VERBATIM ('took a real chance letting me lead the AlphaFold team just six months after finishing my PhD, and the entire GDM team taught me so much about how to do great science.' and 'GDM is a special place, and I'll still be excited to hear about what amazing things they discover next.'); confirms Noam Shazeer (Character AI co-founder) is also leaving DeepMind, in his case for OpenAI; confirms Jumper and Hassabis won the Nobel Prize in 2024 for AlphaFold (3D protein structure prediction). source-1.html.gz (Fortune, allowlisted, status 200): confirms the 'stunned the scientific world with its ability to correctly predict the structure of almost all known proteins from their DNA sequences' quote VERBATIM, plus David Baker (University of Washington, pioneered creation of entirely new proteins), AlphaFold 2, 2020, and Jumper described as a director at DeepMind who led protein-structure efforts. source-2.html.gz (CNBC, allowlisted): this snapshot fetched successfully (status 200, real article content) and confirms 'Alphabet has its worst day in over a year on AI concerns after high-profile exits' — directly supporting the article's hedged stock claim.

Every claim, quote, name, and date traces to a cited source. The stock-drop claim is appropriately hedged with no specific percentage. The omitted specifics that could have been over-claimed — exact share-drop %, the '$2.7 billion' Character.AI figure, and Jumper's precise Anthropic title — are genuinely absent from the body; nothing fabricated to fill those gaps. No misattribution: David Baker is correctly attributed to Fortune (not present in TechCrunch).

High-quality, well-sourced News submission. Headline and lead rest on the allowlisted, fetchable TechCrunch source; both Jumper quotes and the Fortune quote are verbatim; the stock claim is correctly hedged and confirmed by CNBC. Approved for publication.