mirror of https://github.com/openai/codex.git synced 2026-10-19 17:28:46 +00:00

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Eddie Chen cfc946f4e1 Expose and persist turn lineage across the app server (#51415 )

## Why

Clients starting delegated work need to attribute descendant turns to the original turn and retain that attribution through completion and history reads.

## What changed

- Accept optional `parentTurnId` and `rootTurnId` in `turn/start`, and expose `rootTurnId` on returned turns and lifecycle notifications.
- Default new turns to their own root when none is supplied. Preserve the active turn's root when steering, ignoring incoming lineage fields.
- Carry root IDs through completion, interruption, recovery, and fork boundaries, and persist them for paginated history reads. Leave unknown roots null in older history.
- Update protocol schemas and generated TypeScript and Python bindings.

## Testing

Extend coverage for default and explicit roots, steering without changing lineage, interrupted and recovered turns, history reads after restart in both history modes, nested fork pagination, and compatibility with older database writers.

GitOrigin-RevId: f1a570a12bd11742929fd2e8b017e5d35aa07dcb

2026-10-06 16:56:39 +00:00

src

Expose and persist turn lineage across the app server (#51415 )

2026-10-06 16:56:39 +00:00

BUILD.bazel

fix(bazel) add missing app-server-client BUILD.bazel (#14027 )

2026-03-09 03:42:54 +00:00

Cargo.toml

Add support for UDS in codex --remote (#22414 )

2026-05-12 21:17:20 -07:00

README.md

Prevent unread events from blocking in-process requests (#38381 )

2026-08-13 13:57:25 +00:00

README.md

codex-app-server-client

Shared in-process app-server client used by conversational CLI surfaces:

codex-exec
codex-tui

Purpose

This crate centralizes startup and lifecycle management for an in-process codex-app-server runtime, so CLI clients do not need to duplicate:

app-server bootstrap and initialize handshake
in-memory request/event transport wiring
lifecycle orchestration around caller-provided startup identity
graceful shutdown behavior

Startup identity

Callers pass both the app-server SessionSource and the initialize client_info.name explicitly when starting the facade.

That keeps thread metadata (for example in thread/list and thread/read) aligned with the originating runtime without baking TUI/exec-specific policy into the shared client layer.

Transport model

The in-process path uses typed channels:

client -> server: ClientRequest / ClientNotification
server -> client: InProcessServerEvent
- ServerRequest
- ServerNotification
- LegacyNotification

JSON serialization is still used at external transport boundaries (stdio/websocket), but the in-process hot path is typed.

Typed requests still receive app-server responses through the JSON-RPC result envelope internally. That is intentional: the in-process path is meant to preserve app-server semantics while removing the process boundary, not to introduce a second response contract.

Bootstrap behavior

The client facade starts an already-initialized in-process runtime, but thread bootstrap still follows normal app-server flow:

caller sends thread/start or thread/resume
app-server returns the immediate typed response
richer session metadata may arrive later as a SessionConfigured legacy event

Surfaces such as TUI and exec may therefore need a short bootstrap phase where they reconcile startup response data with later events.

Backpressure and shutdown

Command queues and the embedded runtime remain bounded, using DEFAULT_IN_PROCESS_CHANNEL_CAPACITY by default.
The facade's local consumer event queue is unbounded and preserves notification order. This keeps the worker draining the bounded runtime while a caller waits for a request, preventing unread notifications from blocking its response.
shutdown() performs a bounded graceful shutdown and then aborts if timeout is exceeded.