A new CC BY 4.0 panel tracks engineering momentum across 350+ venture-backed GitHub orgs in 15 sectors, refreshed weekly and queryable via JSON/CSV endpoints. The two headline signals, 14-day commit velocity and contributor growth, combine to explain a 3.4× Series-A lift across the 219 startup-period observations that back it. The dataset's thesis: engineering acceleration has historically preceded fundraise announcements by 21-47 days.
An author spent 99 days asking the same 16 questions to OpenAI Search, Gemini, and Claude, scoring every answer under a fixed rubric: 24,882 scored responses in all. The CC BY 4.0 release adds a 6,416-answer no-web control from 10 models, so retrieval effects can be separated from training data, plus a registry of measurement gaps. Rare longitudinal receipts on how consistently answer engines actually find and cite a source.
Historical Swedish handwriting turns OCR output into gibberish, so this release skips text generation entirely: pristine ePub transcriptions are aligned page-by-page with high-res manuscript scans, yielding 278 human-validated image-text rows of Söderberg's Doktor Glas. A 3-page sample is free on Hugging Face, while the full set is locked inside an air-gapped compute-to-data Docker sandbox so enterprises can fine-tune VLMs without ever downloading the images. Small set, clean alignment, weirdly clever security.