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

# The jhansi.io Runtime

> The runtime owns the lifecycle between an execution request and its result.

## Responsibilities

* Accept requests from the SDK or MCP layer.
* Create an appropriate sandbox.
* Run the requested workload.
* Collect output and execution state.
* Terminate and remove the environment.

## Control plane, not model context

The runtime is where operational decisions belong: resource limits, timeouts, available images, network rules and eventually policy and credential controls.

These decisions should not live in the agent's reasoning loop or model context.

## Implementation

The runtime is implemented as [Petri](https://github.com/jhansi-io/petri), an open source FastAPI service. Users interact with it through the jhansi.io SDK or MCP server — the internal name is an implementation detail.