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Max Johnson e2398d0b16 [app-server] expose environment info RPC (#30291)
## Why

App-server clients that configure named execution environments need to
discover an environment's shell and working directory before selecting
it for a thread or turn. Because the environment can run on a different
operating system than app-server, its working directory is represented
as a canonical `file:` URI rather than a host-local path string. The
probe also needs a bounded response time: an exec-server that completes
initialization but never answers `environment/info` must not hold the
environment serialization queue indefinitely.

## What changed

- Add an experimental `environment/info` app-server RPC for named
environments.
- Route the probe through the managed environment connection and return
target-native shell metadata plus the default working directory as a
`PathUri`.
- Return connection and protocol failures as JSON-RPC errors.
- Bound the exec-server probe response to 30 seconds and remove
timed-out calls from the pending-request table so later environment
mutations can proceed.
- Cover successful responses, omitted working directories, unknown
environments, connection failures, and pending-call cleanup.

## Protocol examples

Request:

```json
{
  "id": 42,
  "method": "environment/info",
  "params": {
    "environmentId": "remote-a"
  }
}
```

Successful response:

```json
{
  "id": 42,
  "result": {
    "shell": {
      "name": "zsh",
      "path": "/bin/zsh"
    },
    "cwd": "file:///workspace"
  }
}
```

If the exec-server initializes but does not answer the probe within 30
seconds:

```json
{
  "id": 42,
  "error": {
    "code": -32603,
    "message": "failed to get info for environment `remote-a`: exec-server protocol error: timed out waiting for exec-server `environment/info` response after 30s"
  }
}
```

## Testing

- App-server integration coverage for successful info (including omitted
`cwd`), unknown environments, and connection failures.
- Exec-server RPC coverage verifying a timed-out call is removed from
the pending-request table.

---------

Co-authored-by: Michael Bolin <mbolin@openai.com>
e2398d0b16 ยท 2026-06-27 19:34:10 +00:00
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