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9cd11e9e62
## Stack - Base: #27191 - This PR is the third vertical and should be reviewed against `jif/external-plugins-2`, not `main`. ## Why #27191 moves the host-owned Apps MCP registration behind an extension contributor, but deliberately preserves the existing endpoint-selection feature while that contribution contract lands. App-server can therefore resolve the server through extensions, yet the hosted plugin endpoint is still selected through temporary `apps_mcp_path_override` plumbing. That is not the long-term plugin model. A plugin can bundle skills, connectors, MCP servers, and hooks, and those components do not all need the same source or execution environment. In particular, an authenticated HTTP MCP server can expose plugin capabilities directly from a backend without an executor or an orchestrator filesystem. This PR completes that hosted vertical. App-server's MCP extension now owns the aggregate hosted plugin runtime at `/ps/mcp`. Connector actions continue to arrive as MCP tools, while backend-provided skills arrive as MCP resources and use Codex's existing resource list/read paths. No second backend client, skill filesystem, or generic plugin activation framework is introduced. The backend route remains the hosted implementation. This change replaces Codex's temporary endpoint-selection mechanism, not the service behind the endpoint. ## What changed ### Hosted plugin runtime The MCP extension now contributes `codex_apps` as the hosted plugin runtime rather than as a configurable Apps endpoint: - `https://chatgpt.com` resolves to `https://chatgpt.com/backend-api/ps/mcp`; - a bare custom ChatGPT base resolves to `/api/codex/ps/mcp`; - the existing product-SKU header and ChatGPT authentication behavior are preserved; - executor availability is never consulted for this streamable HTTP transport. The same MCP connection carries both component shapes supported by the hosted endpoint: - connector actions are discovered and invoked as MCP tools; - hosted skills are enumerated and read as MCP resources through the existing `list_mcp_resources` and `read_mcp_resource` paths. This keeps component access in the subsystem that already owns the protocol instead of downloading backend skills into an orchestrator filesystem or inventing a parallel hosted-skill client. ### Explicit runtime ordering `McpManager` now resolves the reserved `codex_apps` entry in three ordered phases: 1. install the legacy Apps fallback for compatibility; 2. apply ordered extension `Set` or `Remove` overlays; 3. apply the final ChatGPT-auth gate without synthesizing the server again. This ordering is important: - an ordinary configured or plugin MCP server cannot claim the auth-bearing `codex_apps` name; - an extension-contributed hosted runtime wins over the fallback; - an extension `Remove` remains authoritative; - a host without the MCP extension retains the legacy Apps endpoint and current local-only behavior. The temporary `legacy_apps_mcp_loader_enabled` coordination flag is no longer needed. ### Remove the path override The `apps_mcp_path_override` feature and its runtime plumbing are removed, including: - the feature registry entry and structured feature config; - `Config` and `McpConfig` fields; - config schema output; - config-lock materialization; - URL override handling in `codex-mcp`. Existing boolean and structured forms still deserialize as ignored compatibility input. They are omitted from new serialized config, and config-lock comparison normalizes the removed input so older locks remain replayable. ### App-server coverage App-server MCP fixtures now serve the hosted route at `/api/codex/ps/mcp`. Existing resource-read and tool/elicitation flows therefore exercise the extension-owned endpoint rather than succeeding through the legacy fallback. The stack also adds the missing `codex_chatgpt::connectors` re-export for the manager-backed connector helper introduced in #27191. ## Compatibility - App-server installs the extension and uses `/ps/mcp` for the hosted runtime. - CLI and other hosts that do not install the extension retain the legacy Apps endpoint. - Apps disabled or non-ChatGPT authentication removes `codex_apps` from the effective runtime view. - Existing local plugins, local skills, executor-selected skills, configured MCP servers, and MCP OAuth behavior are otherwise unchanged. - Backend plugin enablement remains account/workspace state owned by the hosted endpoint; this PR does not add thread-local backend plugin selection. ## Architectural fit The stack now proves two independent runtime shapes: 1. #27184 resolves filesystem-backed skills through the executor that owns a selected root. 2. #27191 and this PR resolve a backend-hosted HTTP MCP through an extension with no executor. Together they preserve the intended separation: - selection identifies a plugin/root when explicit selection is needed; - each component's owning extension resolves its concrete access mechanism; - execution stays with the runtime required by that component; - existing skills, MCP, connector, and hook subsystems remain the downstream consumers. ## Planned follow-ups 1. **Executor stdio MCP:** selecting an executor plugin registers a manifest-declared stdio MCP server and executes it in the environment that owns the plugin. 2. **Optional backend selection:** only if CCA needs thread-local selection distinct from backend account/workspace enablement, add a concrete backend-owned capability location and surface those selected skills through the skills catalog. 3. **Connector metadata and hooks:** activate those plugin components through their existing owning subsystems, with executor hooks remaining environment-bound. 4. **Propagation and persistence:** define explicit resume, fork, subagent, refresh, and environment-removal semantics once selected roots have multiple real consumers. 5. **Local convergence:** migrate legacy local skill, MCP, connector, and hook paths behind their owning extensions one vertical at a time, then remove duplicate core managers and compatibility plumbing after parity. ## Verification Coverage in this change exercises: - extension-owned `/backend-api/ps/mcp` registration without an executor; - preservation of the legacy endpoint in hosts without the extension; - extension `Set` and `Remove` precedence over the legacy fallback; - ChatGPT-auth gating for the reserved server; - hosted MCP resource reads with and without an active thread; - connector tool invocation and MCP elicitation through the hosted route; - ignored boolean and structured forms of the removed path override; - config-lock replay compatibility for the removed feature. `cargo check -p codex-features -p codex-mcp-extension -p codex-app-server` passes. Tests and Clippy were not run locally under the current development instruction; CI provides the full validation pass.
9cd11e9e62
·
2026-06-10 12:54:21 +02:00
7,283 Commits
Codex CLI is a coding agent from OpenAI that runs locally on your computer.
If you want Codex in your code editor (VS Code, Cursor, Windsurf), install in your IDE.
If you want the desktop app experience, run
codex app or visit the Codex App page.
If you are looking for the cloud-based agent from OpenAI, Codex Web, go to chatgpt.com/codex.
Quickstart
Installing and running Codex CLI
Run the following on Mac or Linux to install Codex CLI:
curl -fsSL https://chatgpt.com/codex/install.sh | sh
Run the following on Windows to install Codex CLI:
powershell -ExecutionPolicy ByPass -c "irm https://chatgpt.com/codex/install.ps1 | iex"
Codex CLI can also be installed via the following package managers:
# Install using npm
npm install -g @openai/codex
# Install using Homebrew
brew install --cask codex
Then simply run codex to get started.
You can also go to the latest GitHub Release and download the appropriate binary for your platform.
Each GitHub Release contains many executables, but in practice, you likely want one of these:
- macOS
- Apple Silicon/arm64:
codex-aarch64-apple-darwin.tar.gz - x86_64 (older Mac hardware):
codex-x86_64-apple-darwin.tar.gz
- Apple Silicon/arm64:
- Linux
- x86_64:
codex-x86_64-unknown-linux-musl.tar.gz - arm64:
codex-aarch64-unknown-linux-musl.tar.gz
- x86_64:
Each archive contains a single entry with the platform baked into the name (e.g., codex-x86_64-unknown-linux-musl), so you likely want to rename it to codex after extracting it.
Using Codex with your ChatGPT plan
Run codex and select Sign in with ChatGPT. We recommend signing into your ChatGPT account to use Codex as part of your Plus, Pro, Business, Edu, or Enterprise plan. Learn more about what's included in your ChatGPT plan.
You can also use Codex with an API key, but this requires additional setup.
Docs
This repository is licensed under the Apache-2.0 License.