# App Server Test Client
Quickstart for running and hitting `codex app-server`.

## Quickstart

Run from `<reporoot>/codex-rs`.

```bash
# 1) Build debug codex binary
cargo build -p codex-cli --bin codex

# 2) Start websocket app-server in background
cargo run -p codex-app-server-test-client -- \
  --codex-bin ./target/debug/codex \
  serve --listen ws://127.0.0.1:4222 --kill

# 3) Call app-server (defaults to ws://127.0.0.1:4222)
cargo run -p codex-app-server-test-client -- model-list
```

## Testing Thread Rejoin Behavior

Build and start an app server using commands above. The app-server log is written to `/tmp/codex-app-server-test-client/app-server.log`

### 1) Get a thread id

Create at least one thread, then list threads:

```bash
cargo run -p codex-app-server-test-client -- send-message-v2 "seed thread for rejoin test"
cargo run -p codex-app-server-test-client -- thread-list --limit 5
```

Copy a thread id from the `thread-list` output.

### 2) Rejoin while a turn is in progress (two terminals)

Terminal A:

```bash
cargo run --bin codex-app-server-test-client -- \
  resume-message-v2 <THREAD_ID> "respond with thorough docs on the rust core"
```

Terminal B (while Terminal A is still streaming):

```bash
cargo run --bin codex-app-server-test-client -- thread-resume <THREAD_ID>
```