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start-os/container-runtime/RPCSpec.md
2026-02-10 13:38:40 -07:00

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# Container RPC Server Specification
The container runtime exposes a JSON-RPC server over a Unix socket at `/media/startos/rpc/service.sock`.
## Methods
### init
Initialize the runtime and system.
#### params
```ts
{
id: string,
kind: "install" | "update" | "restore" | null,
}
```
#### response
`null`
### exit
Shutdown runtime and optionally run exit hooks for a target version.
#### params
```ts
{
id: string,
target: string | null, // ExtendedVersion or VersionRange
}
```
#### response
`null`
### start
Run main method if not already running.
#### params
None
#### response
`null`
### stop
Stop main method by sending SIGTERM to child processes, and SIGKILL after timeout.
#### params
None
#### response
`null`
### execute
Run a specific package procedure.
#### params
```ts
{
id: string, // event ID
procedure: string, // JSON path (e.g., "/backup/create", "/actions/{name}/run")
input: any,
timeout: number | null,
}
```
#### response
`any`
### sandbox
Run a specific package procedure in sandbox mode. Same interface as `execute`.
UNIMPLEMENTED: this feature is planned but does not exist
#### params
```ts
{
id: string,
procedure: string,
input: any,
timeout: number | null,
}
```
#### response
`any`
### callback
Handle a callback from an effect.
#### params
```ts
{
id: number,
args: any[],
}
```
#### response
`null` (no response sent)
### eval
Evaluate a script in the runtime context. Used for debugging.
#### params
```ts
{
script: string,
}
```
#### response
`any`
## Procedures
The `execute` and `sandbox` methods route to procedures based on the `procedure` path:
| Procedure | Description |
| -------------------------- | ---------------------------- |
| `/backup/create` | Create a backup |
| `/actions/{name}/getInput` | Get input spec for an action |
| `/actions/{name}/run` | Run an action with input |