Files
codex/codex-rs/debug-client
Alexi Christakis e92c952b2e [codex] Add user input client ids (#24653)
## Summary

Adds an optional `clientId` field to app-server v2 `UserInput` and
carries it through the core `UserInput` model so clients can correlate
echoed user input items without relying on payload equality.

## Details

- Adds `client_id: Option<String>` to core `UserInput` variants.
- Exposes the v2 app-server field as `clientId` on the wire and in
generated TypeScript.
- Preserves the id when converting between app-server v2 and core
protocol types.
- Regenerates app-server schema fixtures.

## Validation

- `just fmt`
- `just write-app-server-schema`
- `cargo test -p codex-app-server-protocol`
- `cargo test -p codex-protocol`
- `just fix -p codex-app-server-protocol`
- `just fix -p codex-protocol`
- `git diff --check`
2026-05-28 14:54:39 -07:00
..

WARNING: this code is mainly generated by Codex and should not be used in production

codex-debug-client

A tiny interactive client for codex app-server (protocol v2 only). It prints all JSON-RPC lines from the server and lets you send new turns as you type.

Usage

Start the app-server client (it will spawn codex app-server itself):

cargo run -p codex-debug-client -- \
  --codex-bin codex \
  --approval-policy on-request \
  --output-file /tmp/app-server-server-json.jsonl

You can resume a specific thread:

cargo run -p codex-debug-client -- --thread-id thr_123

CLI flags

  • --codex-bin <path>: path to the codex binary (default: codex).
  • -c, --config key=value: pass through --config overrides to codex.
  • --thread-id <id>: resume a thread instead of starting a new one.
  • --approval-policy <policy>: untrusted, on-failure (deprecated), on-request, never.
  • --auto-approve: auto-approve command/file-change approvals (default: decline).
  • --final-only: only show completed assistant messages and tool items.
  • --output-file <path>: write raw server JSONL to this file instead of stdout.
  • --model <name>: optional model override for thread start/resume.
  • --model-provider <name>: optional provider override.
  • --cwd <path>: optional working directory override.

Interactive commands

Type a line to send it as a new turn. Commands are prefixed with ::

  • :help show help
  • :new start a new thread
  • :resume <thread-id> resume a thread
  • :use <thread-id> switch active thread without resuming
  • :refresh-thread list available threads
  • :quit exit

The prompt shows the active thread id. Client messages (help, errors, approvals) print to stderr; raw server JSON prints to stdout so you can pipe/record it unless --final-only is set. Pass --output-file <path> to record raw server JSONL to a file instead of stdout.

Notes

  • The client performs the required initialize/initialized handshake.
  • It prints every server notification and response line as it arrives.
  • Approvals for item/commandExecution/requestApproval and item/fileChange/requestApproval are auto-responded to with decline unless --auto-approve is set.