Miju LabsWhy they are on the map
Primary author of Composer 2 technical report (Mar 2026) source — evidence dated 2026-03
Needs the data for a model; writes the spec.
How Cursor (Anysphere) buys data
Composer 2 technical report (27 Mar 2026) trains RL in realistic Cursor sessions; CursorBench built 'from real coding sessions by our engineering team'; 'real-time RL' from production usage. Hiring 'Software Engineer, RL Data', 'RL Environments' (Sep 2026) and 'Engineering Manager, Evals' (Jun 2026). No human-data vendors named; partners Fireworks, Colfax.
ML research team (Sasha Rush et al.) runs Composer post-training/RL; Foundations org owns evals and agent quality.
Known vendors: Fireworks (training infra)
This person was mapped in pass 1. Career, what they have said on the record, interviews, connections, why they matter to us and how to reach them are added in pass 2.