> ## Documentation Index
> Fetch the complete documentation index at: https://docs.hardlightsim.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Hardsim Docs

> Cloud robotics simulation with a Python-first SDK by Hardlight.

Hardsim is a cloud simulation platform for robotics teams that want to run large simulation workloads without managing Kubernetes, GPU provisioning, or container orchestration.

Built and operated by Hardlight.

## What You Can Do

* Submit simulation jobs from Python with `pip install hardsim`.
* Run parallel simulation workloads against cloud GPU workers.
* Download artifacts (`render.mp4`, rollout logs, manifests) from completed jobs.
* Download diagnostics artifacts (`runner.log`, `diagnostics.json`, `user_job.log`) from failed jobs.
* Track usage and billing in credits.

## Quick SDK Flow

```python theme={null}
import hardsim as hs

robot_asset_id = hs.upload_input_asset("./assets/robot.urdf", asset_kind="robot")
scene_asset_id = hs.upload_input_asset("./assets/scene.usd", asset_kind="scene")
job = hs.submit_assets(robot_asset_id=robot_asset_id, scene_asset_id=scene_asset_id, robot_asset_type="urdf", num_envs=64, steps=2000)
result = hs.wait(job.job_id)
paths = hs.download(job.job_id, "./outputs")
```

## Recommended Reading Order

1. [Getting Started](./getting-started)
2. [Quickstart](./customer-quickstart)
3. [Isaac Lab Jobs](./isaac-lab-jobs)
4. [Artifacts and Diagnostics](./artifacts-and-diagnostics)
5. [Billing](./billing-for-customers)
6. [API Overview](./api-overview)