CodeMidas: Scaling Agentic Coding RL Environments from Code Itself
Xiaomi MiMo
An agentic pipeline that converts implemented functionality in existing open-source codebases into executable RL environments for coding agents, using only source code as task-specific input — no issues or commits needed. Agents explore the code to write behavioral specs, then build tasks with reliable verifiers.
Why it matters
Removes the main scalability bottleneck in coding-agent RL (environments built from dev artifacts); HF Daily Papers top item of the batch with 88 upvotes.
Importance: 3/5
Top paper of the HF Daily batch (88 upvotes)
Sources
secondary
Hugging Face Daily Papers — Sep 21, 2026