Sim-to-Sim

Move the same task between MuJoCo and Motrix through owner YAMLs and backend contracts.

Backend swap

Select the backend through the task owner YAML.

Backend Swap
Owner YAML swap

Add or inspect a backend YAML for an existing task.

Adding a Backend YAML to an Existing Task
Contact and friction

Align contact-related assumptions across simulators.

Aligning Contact and Friction Between Backends
Reward parity

Check reward terms near backend boundaries.

Reward Parity Across Backends
Playback differences

Understand renderer and snapshot capability differences.

Playback and Snapshot Differences
Capability gaps

Document unsupported backend features with evidence.

Capability Gaps