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---
name: genesis
description: Use when working on Genesis simulation, RL teacher training, visual demo generation, or related serverless/EGL behavior.
---
# Genesis
Genesis is the GPU-accelerated physics simulation tool. It uses vendored `genesis.ext.pyrender` plus PyOpenGL EGL.
## Current Capability
- RL teacher training works headless on Nebius AI Jobs with Mesa llvmpipe fallback.
- Serverless RL teacher training works.
- 480x640 targeted renders pass via Mesa; scale performance is untested.
## Rendering Gap
Visual demo generation is blocked on EGL/DRI device access in containers. `libEGL_nvidia.so.0` is absent despite graphics capability environment variables, so workloads fall back to Mesa, which cannot scale.
Serverless visual demo generation is blocked by the same EGL/DRI issue.
BatchRenderer/Madrona is deferred; do not prioritize it. There is no platform escalation pending and no `BUNDLE_EGL_NVIDIA` action item.
## Validation
E2E: 8/8 passing except visual demo generation.
## Teacher checkpoint compatibility
The RSL-RL 5 migration uses separate MLP actor and critic configurations and
TensorDict observation groups. Preserve deterministic legacy ActorCritic loading
and the current MLPModel checkpoint path. Load external checkpoints only with
`weights_only=True`; never route them through the upstream unrestricted runner
loader. Validate action and observation widths, normalization, and real ONNX
outputs. CPU PPO round trips cover the framework contract; promotion still
requires the Genesis GPU workload and camera-demo checks.
Run the committed migration check in the candidate GPU environment:
```bash
NPA_VALIDATION_SOURCE_SHA="$(git rev-parse HEAD)" \
npa/.venv/bin/python npa/scripts/validate_genesis_rsl_migration.py \
--output-path /tmp/genesis-rsl-validation
```
It trains in real physics, compares the restricted loader and ONNX Runtime
against the upstream actor, and records real camera arrays. The short training
run checks framework compatibility; its report preserves the actual teacher
success rate and explicitly labels any failure demonstrations.
