The largest agentic-coding trace dataset to date: 112 B tokens of execution-free agentic trajectories covering 122 K pull requests, 3 K repositories, and 16 programming languages.

Motivation

Agentic mid-training has become a standard ingredient for frontier coding models:

Code World Model (Sept 2025) mid-trains on 5 T tokens, using 3 M agentic trajectories from 10.2 K Docker images across 3.15 K repos. Kimi-Dev (Dec 2025) mid-trains on ~150 B… See the full description on the dataset page: https://huggingface.co/datasets/AlienKevin/SWE-ZERO-12M-trajectories.