openclaw/docs/plugins/codex-harness.md

summary, title, read_when

summary	title	read_when
Run OpenClaw embedded agent turns through the bundled Codex app-server harness	Codex harness	You want to use the bundled Codex app-server harness You need Codex harness config examples You want Codex-only deployments to fail instead of falling back to PI

The bundled codex plugin lets OpenClaw run embedded agent turns through the Codex app-server instead of the built-in PI harness.

Use this when you want Codex to own the low-level agent session: model discovery, native thread resume, native compaction, and app-server execution. OpenClaw still owns chat channels, session files, model selection, tools, approvals, media delivery, and the visible transcript mirror.

When a source chat turn runs through the Codex harness, visible replies default to the OpenClaw message tool if the deployment has not explicitly configured messages.visibleReplies. The agent can still finish its Codex turn privately; it only posts to the channel when it calls message(action="send"). Set messages.visibleReplies: "automatic" to keep direct-chat final replies on the legacy automatic delivery path.

Codex heartbeat turns also get the heartbeat_respond tool by default, so the agent can record whether the wake should stay quiet or notify without encoding that control flow in final text.

Heartbeat-specific initiative guidance is sent as a Codex collaboration-mode developer instruction on the heartbeat turn itself. Ordinary chat turns restore Codex Default mode instead of carrying heartbeat philosophy in their normal runtime prompt.

If you are trying to orient yourself, start with Agent runtimes. The short version is: openai/gpt-5.5 is the model ref, codex is the runtime, and Telegram, Discord, Slack, or another channel remains the communication surface.

Quick config

Most users who want "Codex in OpenClaw" want this route: sign in with a ChatGPT/Codex subscription, then run embedded agent turns through the native Codex app-server runtime. The model ref still stays canonical as openai/gpt-*; subscription auth comes from the Codex account/profile, not from an openai-codex/* model prefix.

First sign in with Codex OAuth if you have not already:

openclaw models auth login --provider openai-codex

Then enable the bundled codex plugin and force the Codex runtime:

{
  plugins: {
    entries: {
      codex: {
        enabled: true,
      },
    },
  },
  agents: {
    defaults: {
      model: "openai/gpt-5.5",
      agentRuntime: {
        id: "codex",
      },
    },
  },
}

If your config uses plugins.allow, include codex there too:

{
  plugins: {
    allow: ["codex"],
    entries: {
      codex: {
        enabled: true,
      },
    },
  },
}

Do not use openai-codex/gpt-* in config. That prefix is a legacy route that openclaw doctor --fix rewrites to openai/gpt-* across primary models, fallbacks, heartbeat/subagent/compaction overrides, hooks, channel overrides, and stale persisted session route pins.

What this plugin changes

The bundled codex plugin contributes several separate capabilities:

Capability	How you use it	What it does
Native embedded runtime	agentRuntime.id: "codex"	Runs OpenClaw embedded agent turns through Codex app-server.
Native chat-control commands	/codex bind, /codex resume, /codex steer, ...	Binds and controls Codex app-server threads from a messaging conversation.
Codex app-server provider/catalog	codex internals, surfaced through the harness	Lets the runtime discover and validate app-server models.
Codex media-understanding path	codex/* image-model compatibility paths	Runs bounded Codex app-server turns for supported image understanding models.
Native hook relay	Plugin hooks around Codex-native events	Lets OpenClaw observe/block supported Codex-native tool/finalization events.

Enabling the plugin makes those capabilities available. It does not:

• start using Codex for every OpenAI model
• convert openai-codex/* model refs into the native runtime without doctor verifying that Codex is installed, enabled, contributes the codex harness, and is OAuth-ready
• make ACP/acpx the default Codex path
• hot-switch existing sessions that already recorded a PI runtime
• replace OpenClaw channel delivery, session files, auth-profile storage, or message routing

The same plugin also owns the native /codex chat-control command surface. If the plugin is enabled and the user asks to bind, resume, steer, stop, or inspect Codex threads from chat, agents should prefer /codex ... over ACP. ACP remains the explicit fallback when the user asks for ACP/acpx or is testing the ACP Codex adapter.

Native Codex turns keep OpenClaw plugin hooks as the public compatibility layer. These are in-process OpenClaw hooks, not Codex hooks.json command hooks:

• before_prompt_build
• before_compaction, after_compaction
• llm_input, llm_output
• before_tool_call, after_tool_call
• before_message_write for mirrored transcript records
• before_agent_finalize through Codex Stop relay
• agent_end

Plugins can also register runtime-neutral tool-result middleware to rewrite OpenClaw dynamic tool results after OpenClaw executes the tool and before the result is returned to Codex. This is separate from the public tool_result_persist plugin hook, which transforms OpenClaw-owned transcript tool-result writes.

For the plugin hook semantics themselves, see Plugin hooks and Plugin guard behavior.

The harness is off by default. New configs should keep OpenAI model refs canonical as openai/gpt-* and explicitly force agentRuntime.id: "codex" or OPENCLAW_AGENT_RUNTIME=codex when they want native app-server execution. Legacy codex/* model refs still auto-select the harness for compatibility, but runtime-backed legacy provider prefixes are not shown as normal model/provider choices.

If any configured model route is still openai-codex/*, openclaw doctor --fix rewrites it to openai/*. For matching agent routes, it sets the agent runtime to codex only when the Codex plugin is installed, enabled, contributes the codex harness, and has usable OAuth; otherwise it sets the runtime to pi.

Route map

Use this table before changing config:

Desired behavior	Model ref	Runtime config	Auth/profile route	Expected status label
ChatGPT/Codex subscription with native Codex runtime	openai/gpt-*	agentRuntime.id: "codex"	Codex OAuth or Codex account	Runtime: OpenAI Codex
OpenAI API through normal OpenClaw runner	openai/gpt-*	omitted or runtime: "pi"	OpenAI API key	Runtime: OpenClaw Pi Default
Legacy config that needs doctor repair	openai-codex/gpt-*	repaired to codex or pi	Existing configured auth	Recheck after doctor --fix
Mixed providers with conservative auto mode	provider-specific refs	agentRuntime.id: "auto"	Per selected provider	Depends on selected runtime
Explicit Codex ACP adapter session	ACP prompt/model dependent	sessions_spawn with runtime: "acp"	ACP backend auth	ACP task/session status

The important split is provider versus runtime:

• openai-codex/* is a legacy route that doctor rewrites.
• agentRuntime.id: "codex" requires the Codex harness and fails closed if it is unavailable.
• agentRuntime.id: "auto" lets registered harnesses claim matching provider routes, but canonical OpenAI refs are still PI-owned unless a harness supports that provider/model pair.
• /codex ... answers "which native Codex conversation should this chat bind or control?"
• ACP answers "which external harness process should acpx launch?"

Pick the right model prefix

OpenAI-family routes are prefix-specific. For the common subscription plus native Codex runtime setup, use openai/* with agentRuntime.id: "codex". Treat openai-codex/* as legacy config that doctor should rewrite:

Model ref	Runtime path	Use when
openai/gpt-5.4	OpenAI provider through OpenClaw/PI plumbing	You want current direct OpenAI Platform API access with OPENAI_API_KEY.
openai-codex/gpt-5.5	Legacy route repaired by doctor	You are on old config; run openclaw doctor --fix to rewrite it.
openai/gpt-5.5 + agentRuntime.id: "codex"	Codex app-server harness	You want ChatGPT/Codex subscription auth with native Codex execution.

GPT-5.5 can appear on both direct OpenAI API-key and Codex subscription routes when your account exposes them. Use openai/gpt-5.5 with the Codex app-server harness for native Codex runtime, or openai/gpt-5.5 without a Codex runtime override for direct API-key traffic.

Legacy codex/gpt-* refs remain accepted as compatibility aliases. Doctor compatibility migration rewrites legacy runtime refs to canonical model refs and records the runtime policy separately. New native app-server harness configs should use openai/gpt-* plus agentRuntime.id: "codex".

agents.defaults.imageModel follows the same prefix split. Use openai/gpt-* for the normal OpenAI route and codex/gpt-* when image understanding should run through a bounded Codex app-server turn. Do not use openai-codex/gpt-*; doctor rewrites that legacy prefix to openai/gpt-*. The Codex app-server model must advertise image input support; text-only Codex models fail before the media turn starts.

Use /status to confirm the effective harness for the current session. If the selection is surprising, enable debug logging for the agents/harness subsystem and inspect the gateway's structured agent harness selected record. It includes the selected harness id, selection reason, runtime/fallback policy, and, in auto mode, each plugin candidate's support result.

What doctor warnings mean

openclaw doctor warns when configured model refs or persisted session route state still use openai-codex/*. openclaw doctor --fix rewrites those routes to:

• openai/<model>
• agentRuntime.id: "codex" when Codex is installed, enabled, contributes the codex harness, and has usable OAuth
• agentRuntime.id: "pi" otherwise

The codex route forces the native Codex harness. The pi route keeps the agent on the default OpenClaw runner instead of enabling or installing Codex as a side effect of legacy-route cleanup. Doctor also repairs stale persisted session pins across discovered agent session stores so old conversations do not stay wedged on the removed route.

Harness selection is not a live session control. When an embedded turn runs, OpenClaw records the selected harness id on that session and keeps using it for later turns in the same session id. Change agentRuntime config or OPENCLAW_AGENT_RUNTIME when you want future sessions to use another harness; use /new or /reset to start a fresh session before switching an existing conversation between PI and Codex. This avoids replaying one transcript through two incompatible native session systems.

Legacy sessions created before harness pins are treated as PI-pinned once they have transcript history. Use /new or /reset to opt that conversation into Codex after changing config.

/status shows the effective model runtime. The default PI harness appears as Runtime: OpenClaw Pi Default, and the Codex app-server harness appears as Runtime: OpenAI Codex.

Requirements

• OpenClaw with the bundled codex plugin available.
• Codex app-server 0.125.0 or newer. The bundled plugin manages a compatible Codex app-server binary by default, so local codex commands on PATH do not affect normal harness startup.
• Codex auth available to the app-server process or to OpenClaw's Codex auth bridge. Local app-server launches use an OpenClaw-managed Codex home for each agent and an isolated child HOME, so they do not read your personal ~/.codex account, skills, plugins, config, thread state, or native $HOME/.agents/skills by default.

The plugin blocks older or unversioned app-server handshakes. That keeps OpenClaw on the protocol surface it has been tested against.

For live and Docker smoke tests, auth usually comes from the Codex CLI account or an OpenClaw openai-codex auth profile. Local stdio app-server launches can also fall back to CODEX_API_KEY / OPENAI_API_KEY when no account is present.

Workspace bootstrap files

Codex handles AGENTS.md itself through native project-doc discovery. OpenClaw does not write synthetic Codex project-doc files or depend on Codex fallback filenames for persona files, because Codex fallbacks only apply when AGENTS.md is missing.

For OpenClaw workspace parity, the Codex harness resolves the other bootstrap files (SOUL.md, TOOLS.md, IDENTITY.md, USER.md, HEARTBEAT.md, BOOTSTRAP.md, and MEMORY.md when present) and forwards them through Codex config instructions on thread/start and thread/resume. This keeps SOUL.md and related workspace persona/profile context visible without duplicating AGENTS.md.

Add Codex alongside other models

Do not set agentRuntime.id: "codex" globally if the same agent should freely switch between Codex and non-Codex provider models. A forced runtime applies to every embedded turn for that agent or session. If you select an Anthropic model while that runtime is forced, OpenClaw still tries the Codex harness and fails closed instead of silently routing that turn through PI.

Use one of these shapes instead:

• Put Codex on a dedicated agent with agentRuntime.id: "codex".
• Keep the default agent on agentRuntime.id: "auto" and PI fallback for normal mixed provider usage.
• Use legacy codex/* refs only for compatibility. New configs should prefer openai/* plus an explicit Codex runtime policy.

For example, this keeps the default agent on normal automatic selection and adds a separate Codex agent:

{
  plugins: {
    entries: {
      codex: {
        enabled: true,
      },
    },
  },
  agents: {
    defaults: {
      agentRuntime: {
        id: "auto",
      },
    },
    list: [
      {
        id: "main",
        default: true,
        model: "anthropic/claude-opus-4-6",
      },
      {
        id: "codex",
        name: "Codex",
        model: "openai/gpt-5.5",
        agentRuntime: {
          id: "codex",
        },
      },
    ],
  },
}

With this shape:

• The default main agent uses the normal provider path and PI compatibility fallback.
• The codex agent uses the Codex app-server harness.
• If Codex is missing or unsupported for the codex agent, the turn fails instead of quietly using PI.

Agent command routing

Agents should route user requests by intent, not by the word "Codex" alone:

User asks for...	Agent should use...
"Bind this chat to Codex"	/codex bind
"Resume Codex thread <id> here"	/codex resume <id>
"Show Codex threads"	/codex threads
"File a support report for a bad Codex run"	/diagnostics [note]
"Only send Codex feedback for this attached thread"	/codex diagnostics [note]
"Use my ChatGPT/Codex subscription with Codex runtime"	openai/* plus agentRuntime.id: "codex"
"Repair old openai-codex/* config/session pins"	openclaw doctor --fix
"Run Codex through ACP/acpx"	ACP sessions_spawn({ runtime: "acp", ... })
"Start Claude Code/Gemini/OpenCode/Cursor in a thread"	ACP/acpx, not /codex and not native sub-agents

OpenClaw only advertises ACP spawn guidance to agents when ACP is enabled, dispatchable, and backed by a loaded runtime backend. If ACP is not available, the system prompt and plugin skills should not teach the agent about ACP routing.

Codex-only deployments

Force the Codex harness when you need to prove that every embedded agent turn uses Codex. Explicit plugin runtimes fail closed and are never silently retried through PI:

{
  agents: {
    defaults: {
      model: "openai/gpt-5.5",
      agentRuntime: {
        id: "codex",
      },
    },
  },
}

Environment override:

OPENCLAW_AGENT_RUNTIME=codex openclaw gateway run

With Codex forced, OpenClaw fails early if the Codex plugin is disabled, the app-server is too old, or the app-server cannot start.

Per-agent Codex

You can make one agent Codex-only while the default agent keeps normal auto-selection:

{
  agents: {
    defaults: {
      agentRuntime: {
        id: "auto",
      },
    },
    list: [
      {
        id: "main",
        default: true,
        model: "anthropic/claude-opus-4-6",
      },
      {
        id: "codex",
        name: "Codex",
        model: "openai/gpt-5.5",
        agentRuntime: {
          id: "codex",
        },
      },
    ],
  },
}

Use normal session commands to switch agents and models. /new creates a fresh OpenClaw session and the Codex harness creates or resumes its sidecar app-server thread as needed. /reset clears the OpenClaw session binding for that thread and lets the next turn resolve the harness from current config again.

Model discovery

By default, the Codex plugin asks the app-server for available models. If discovery fails or times out, it uses a bundled fallback catalog for:

• GPT-5.5
• GPT-5.4 mini
• GPT-5.2

You can tune discovery under plugins.entries.codex.config.discovery:

{
  plugins: {
    entries: {
      codex: {
        enabled: true,
        config: {
          discovery: {
            enabled: true,
            timeoutMs: 2500,
          },
        },
      },
    },
  },
}

Disable discovery when you want startup to avoid probing Codex and stick to the fallback catalog:

{
  plugins: {
    entries: {
      codex: {
        enabled: true,
        config: {
          discovery: {
            enabled: false,
          },
        },
      },
    },
  },
}

App-server connection and policy

By default, the plugin starts OpenClaw's managed Codex binary locally with:

codex app-server --listen stdio://

The managed binary is shipped with the codex plugin package. This keeps the app-server version tied to the bundled plugin instead of whichever separate Codex CLI happens to be installed locally. Set appServer.command only when you intentionally want to run a different executable.

By default, OpenClaw starts local Codex harness sessions in YOLO mode: approvalPolicy: "never", approvalsReviewer: "user", and sandbox: "danger-full-access". This is the trusted local operator posture used for autonomous heartbeats: Codex can use shell and network tools without stopping on native approval prompts that nobody is around to answer.

To opt in to Codex guardian-reviewed approvals, set appServer.mode: "guardian":

{
  plugins: {
    entries: {
      codex: {
        enabled: true,
        config: {
          appServer: {
            mode: "guardian",
            serviceTier: "fast",
          },
        },
      },
    },
  },
}

Guardian mode uses Codex's native auto-review approval path. When Codex asks to leave the sandbox, write outside the workspace, or add permissions like network access, Codex routes that approval request to the native reviewer instead of a human prompt. The reviewer applies Codex's risk framework and approves or denies the specific request. Use Guardian when you want more guardrails than YOLO mode but still need unattended agents to make progress.

The guardian preset expands to approvalPolicy: "on-request", approvalsReviewer: "auto_review", and sandbox: "workspace-write". Individual policy fields still override mode, so advanced deployments can mix the preset with explicit choices. The older guardian_subagent reviewer value is still accepted as a compatibility alias, but new configs should use auto_review.

For an already-running app-server, use WebSocket transport:

{
  plugins: {
    entries: {
      codex: {
        enabled: true,
        config: {
          appServer: {
            transport: "websocket",
            url: "ws://127.0.0.1:39175",
            authToken: "${CODEX_APP_SERVER_TOKEN}",
            requestTimeoutMs: 60000,
          },
        },
      },
    },
  },
}

Stdio app-server launches inherit OpenClaw's process environment by default, but OpenClaw owns the Codex app-server account bridge and sets both CODEX_HOME and HOME to per-agent directories under that agent's OpenClaw state. Codex's own skill loader reads $CODEX_HOME/skills and $HOME/.agents/skills, so both values are isolated for local app-server launches. That keeps Codex-native skills, plugins, config, accounts, and thread state scoped to the OpenClaw agent instead of leaking in from the operator's personal Codex CLI home.

OpenClaw plugins and OpenClaw skill snapshots still flow through OpenClaw's own plugin registry and skill loader. Personal Codex CLI assets do not. If you have useful Codex CLI skills or plugins that should become part of an OpenClaw agent, inventory them explicitly:

openclaw migrate codex --dry-run
openclaw migrate apply codex --yes

The Codex migration provider copies skills into the current OpenClaw agent workspace. Codex native plugins, hooks, and config files are reported or archived for manual review instead of being activated automatically, because they can execute commands, expose MCP servers, or carry credentials.

Auth is selected in this order:

1. An explicit OpenClaw Codex auth profile for the agent.
2. The app-server's existing account in that agent's Codex home.
3. For local stdio app-server launches only, CODEX_API_KEY, then OPENAI_API_KEY, when no app-server account is present and OpenAI auth is still required.

When OpenClaw sees a ChatGPT subscription-style Codex auth profile, it removes CODEX_API_KEY and OPENAI_API_KEY from the spawned Codex child process. That keeps Gateway-level API keys available for embeddings or direct OpenAI models without making native Codex app-server turns bill through the API by accident. Explicit Codex API-key profiles and local stdio env-key fallback use app-server login instead of inherited child-process env. WebSocket app-server connections do not receive Gateway env API-key fallback; use an explicit auth profile or the remote app-server's own account.

If a deployment needs additional environment isolation, add those variables to appServer.clearEnv:

{
  plugins: {
    entries: {
      codex: {
        enabled: true,
        config: {
          appServer: {
            clearEnv: ["CODEX_API_KEY", "OPENAI_API_KEY"],
          },
        },
      },
    },
  },
}

appServer.clearEnv only affects the spawned Codex app-server child process.

Codex dynamic tools default to the native-first profile. In that mode, OpenClaw does not expose dynamic tools that duplicate Codex-native workspace operations: read, write, edit, apply_patch, exec, process, and update_plan. OpenClaw integration tools such as messaging, sessions, media, cron, browser, nodes, gateway, heartbeat_respond, and web_search remain available.

Supported top-level Codex plugin fields:

Field	Default	Meaning
codexDynamicToolsProfile	"native-first"	Use "openclaw-compat" to expose the full OpenClaw dynamic tool set to Codex app-server.
codexDynamicToolsExclude	[]	Additional OpenClaw dynamic tool names to omit from Codex app-server turns.

Supported appServer fields:

Field	Default	Meaning
transport	"stdio"	"stdio" spawns Codex; "websocket" connects to url.
command	managed Codex binary	Executable for stdio transport. Leave unset to use the managed binary; set it only for an explicit override.
args	["app-server", "--listen", "stdio://"]	Arguments for stdio transport.
url	unset	WebSocket app-server URL.
authToken	unset	Bearer token for WebSocket transport.
headers	{}	Extra WebSocket headers.
clearEnv	[]	Extra environment variable names removed from the spawned stdio app-server process after OpenClaw builds its inherited environment. CODEX_HOME and HOME are reserved for OpenClaw's per-agent Codex isolation on local launches.
requestTimeoutMs	60000	Timeout for app-server control-plane calls.
mode	"yolo"	Preset for YOLO or guardian-reviewed execution.
approvalPolicy	"never"	Native Codex approval policy sent to thread start/resume/turn.
sandbox	"danger-full-access"	Native Codex sandbox mode sent to thread start/resume.
approvalsReviewer	"user"	Use "auto_review" to let Codex review native approval prompts. guardian_subagent remains a legacy alias.
serviceTier	unset	Optional Codex app-server service tier: "fast", "flex", or null. Invalid legacy values are ignored.

OpenClaw-owned dynamic tool calls are bounded independently from appServer.requestTimeoutMs: each Codex item/tool/call request must receive an OpenClaw response within 30 seconds. On timeout, OpenClaw aborts the tool signal where supported and returns a failed dynamic-tool response to Codex so the turn can continue instead of leaving the session in processing.

After OpenClaw responds to a Codex turn-scoped app-server request, the harness also expects Codex to finish the native turn with turn/completed. If the app-server goes quiet for 60 seconds after that response, OpenClaw best-effort interrupts the Codex turn, records a diagnostic timeout, and releases the OpenClaw session lane so follow-up chat messages are not queued behind a stale native turn.

Environment overrides remain available for local testing:

• OPENCLAW_CODEX_APP_SERVER_BIN
• OPENCLAW_CODEX_APP_SERVER_ARGS
• OPENCLAW_CODEX_APP_SERVER_MODE=yolo|guardian
• OPENCLAW_CODEX_APP_SERVER_APPROVAL_POLICY
• OPENCLAW_CODEX_APP_SERVER_SANDBOX

OPENCLAW_CODEX_APP_SERVER_BIN bypasses the managed binary when appServer.command is unset.

OPENCLAW_CODEX_APP_SERVER_GUARDIAN=1 was removed. Use plugins.entries.codex.config.appServer.mode: "guardian" instead, or OPENCLAW_CODEX_APP_SERVER_MODE=guardian for one-off local testing. Config is preferred for repeatable deployments because it keeps the plugin behavior in the same reviewed file as the rest of the Codex harness setup.

Computer use

Computer Use is covered in its own setup guide: Codex Computer Use.

The short version: OpenClaw does not vendor the desktop-control app or execute desktop actions itself. It prepares Codex app-server, verifies that the computer-use MCP server is available, and then lets Codex handle the native MCP tool calls during Codex-mode turns.

For direct TryCua driver access outside the Codex marketplace flow, register cua-driver mcp with openclaw mcp set cua-driver '{"command":"cua-driver","args":["mcp"]}'. See Codex Computer Use for the distinction between Codex-owned Computer Use and direct MCP registration.

Minimal config:

{
  plugins: {
    entries: {
      codex: {
        enabled: true,
        config: {
          computerUse: {
            autoInstall: true,
          },
        },
      },
    },
  },
  agents: {
    defaults: {
      model: "openai/gpt-5.5",
      agentRuntime: {
        id: "codex",
      },
    },
  },
}

The setup can be checked or installed from the command surface:

• /codex computer-use status
• /codex computer-use install
• /codex computer-use install --source <marketplace-source>
• /codex computer-use install --marketplace-path <path>

Computer Use is macOS-specific and may require local OS permissions before the Codex MCP server can control apps. If computerUse.enabled is true and the MCP server is unavailable, Codex-mode turns fail before the thread starts instead of silently running without the native Computer Use tools. See Codex Computer Use for marketplace choices, remote catalog limits, status reasons, and troubleshooting.

When computerUse.autoInstall is true, OpenClaw can register the standard bundled Codex Desktop marketplace from /Applications/Codex.app/Contents/Resources/plugins/openai-bundled if Codex has not discovered a local marketplace yet. Use /new or /reset after changing runtime or Computer Use config so existing sessions do not keep an old PI or Codex thread binding.

Common recipes

Local Codex with default stdio transport:

{
  plugins: {
    entries: {
      codex: {
        enabled: true,
      },
    },
  },
}

Codex-only harness validation:

{
  agents: {
    defaults: {
      model: "openai/gpt-5.5",
      agentRuntime: {
        id: "codex",
      },
    },
  },
  plugins: {
    entries: {
      codex: {
        enabled: true,
      },
    },
  },
}

Guardian-reviewed Codex approvals:

{
  plugins: {
    entries: {
      codex: {
        enabled: true,
        config: {
          appServer: {
            mode: "guardian",
            approvalPolicy: "on-request",
            approvalsReviewer: "auto_review",
            sandbox: "workspace-write",
          },
        },
      },
    },
  },
}

Remote app-server with explicit headers:

{
  plugins: {
    entries: {
      codex: {
        enabled: true,
        config: {
          appServer: {
            transport: "websocket",
            url: "ws://gateway-host:39175",
            headers: {
              "X-OpenClaw-Agent": "main",
            },
          },
        },
      },
    },
  },
}

Model switching stays OpenClaw-controlled. When an OpenClaw session is attached to an existing Codex thread, the next turn sends the currently selected OpenAI model, provider, approval policy, sandbox, and service tier to app-server again. Switching from openai/gpt-5.5 to openai/gpt-5.2 keeps the thread binding but asks Codex to continue with the newly selected model.

Codex command

The bundled plugin registers /codex as an authorized slash command. It is generic and works on any channel that supports OpenClaw text commands.

Common forms:

• /codex status shows live app-server connectivity, models, account, rate limits, MCP servers, and skills.
• /codex models lists live Codex app-server models.
• /codex threads [filter] lists recent Codex threads.
• /codex resume <thread-id> attaches the current OpenClaw session to an existing Codex thread.
• /codex compact asks Codex app-server to compact the attached thread.
• /codex review starts Codex native review for the attached thread.
• /codex diagnostics [note] asks before sending Codex diagnostics feedback for the attached thread.
• /codex computer-use status checks the configured Computer Use plugin and MCP server.
• /codex computer-use install installs the configured Computer Use plugin and reloads MCP servers.
• /codex account shows account and rate-limit status.
• /codex mcp lists Codex app-server MCP server status.
• /codex skills lists Codex app-server skills.

When Codex reports a usage-limit failure, OpenClaw includes the next app-server reset time when Codex provided one. Use /codex account in the same conversation to inspect the current account and rate-limit windows.

Common debugging workflow

When a Codex-backed agent does something surprising in Telegram, Discord, Slack, or another channel, start with the conversation where the problem happened:

1. Run /diagnostics bad tool choice after image upload or another short note that describes what you saw.
2. Approve the diagnostics request once. The approval creates the local Gateway diagnostics zip and, because the session is using the Codex harness, also sends the relevant Codex feedback bundle to OpenAI servers.
3. Copy the completed diagnostics reply into the bug report or support thread. It includes the local bundle path, privacy summary, OpenClaw session ids, Codex thread ids, and an Inspect locally line for each Codex thread.
4. If you want to debug the run yourself, run the printed Inspect locally command in a terminal. It looks like codex resume <thread-id> and opens the native Codex thread so you can inspect the conversation, continue it locally, or ask Codex why it chose a particular tool or plan.

Use /codex diagnostics [note] only when you specifically want the Codex feedback upload for the currently attached thread without the full OpenClaw Gateway diagnostics bundle. For most support reports, /diagnostics [note] is the better starting point because it ties the local Gateway state and Codex thread ids together in one reply. See Diagnostics export for the full privacy model and group-chat behavior.

Core OpenClaw also exposes owner-only /diagnostics [note] as the general Gateway diagnostics command. Its approval prompt shows the sensitive-data preamble, links to Diagnostics Export, and requests openclaw gateway diagnostics export --json through explicit exec approval every time. Do not approve diagnostics with an allow-all rule. After approval, OpenClaw sends a pasteable report with the local bundle path and manifest summary. When the active OpenClaw session is using the Codex harness, that same approval also authorizes sending the relevant Codex feedback bundles to OpenAI servers. The approval prompt says that Codex feedback will be sent, but it does not list Codex session or thread ids before approval.

If /diagnostics is invoked by an owner in a group chat, OpenClaw keeps the shared channel clean: the group receives only a short notice, while the diagnostics preamble, approval prompts, and Codex session/thread ids are sent to the owner through the private approval route. If there is no private owner route, OpenClaw refuses the group request and asks the owner to run it from a DM.

The approved Codex upload calls Codex app-server feedback/upload and asks app-server to include logs for each listed thread and spawned Codex subthreads when available. The upload goes through Codex's normal feedback path to OpenAI servers; if Codex feedback is disabled in that app-server, the command returns the app-server error. The completed diagnostics reply lists the channels, OpenClaw session ids, Codex thread ids, and local codex resume <thread-id> commands for the threads that were sent. If you deny or ignore the approval, OpenClaw does not print those Codex ids. This upload does not replace the local Gateway diagnostics export.

/codex resume writes the same sidecar binding file that the harness uses for normal turns. On the next message, OpenClaw resumes that Codex thread, passes the currently selected OpenClaw model into app-server, and keeps extended history enabled.

Inspect a Codex thread from the CLI

The fastest way to understand a bad Codex run is often to open the native Codex thread directly:

codex resume <thread-id>

Use this when you notice a bug in a channel conversation and want to inspect the problematic Codex session, continue it locally, or ask Codex why it made a particular tool or reasoning choice. The easiest path is usually to run /diagnostics [note] first: after you approve it, the completed report lists each Codex thread and prints an Inspect locally command, for example codex resume <thread-id>. You can copy that command directly into a terminal.

You can also get a thread id from /codex binding for the current chat or /codex threads [filter] for recent Codex app-server threads, then run the same codex resume command in your shell.

The command surface requires Codex app-server 0.125.0 or newer. Individual control methods are reported as unsupported by this Codex app-server if a future or custom app-server does not expose that JSON-RPC method.

Hook boundaries

The Codex harness has three hook layers:

Layer	Owner	Purpose
OpenClaw plugin hooks	OpenClaw	Product/plugin compatibility across PI and Codex harnesses.
Codex app-server extension middleware	OpenClaw bundled plugins	Per-turn adapter behavior around OpenClaw dynamic tools.
Codex native hooks	Codex	Low-level Codex lifecycle and native tool policy from Codex config.

OpenClaw does not use project or global Codex hooks.json files to route OpenClaw plugin behavior. For the supported native tool and permission bridge, OpenClaw injects per-thread Codex config for PreToolUse, PostToolUse, PermissionRequest, and Stop. Other Codex hooks such as SessionStart and UserPromptSubmit remain Codex-level controls; they are not exposed as OpenClaw plugin hooks in the v1 contract.

For OpenClaw dynamic tools, OpenClaw executes the tool after Codex asks for the call, so OpenClaw fires the plugin and middleware behavior it owns in the harness adapter. For Codex-native tools, Codex owns the canonical tool record. OpenClaw can mirror selected events, but it cannot rewrite the native Codex thread unless Codex exposes that operation through app-server or native hook callbacks.

Compaction and LLM lifecycle projections come from Codex app-server notifications and OpenClaw adapter state, not native Codex hook commands. OpenClaw's before_compaction, after_compaction, llm_input, and llm_output events are adapter-level observations, not byte-for-byte captures of Codex's internal request or compaction payloads.

Codex native hook/started and hook/completed app-server notifications are projected as codex_app_server.hook agent events for trajectory and debugging. They do not invoke OpenClaw plugin hooks.

V1 support contract

Codex mode is not PI with a different model call underneath. Codex owns more of the native model loop, and OpenClaw adapts its plugin and session surfaces around that boundary.

Supported in Codex runtime v1:

Surface	Support	Why
OpenAI model loop through Codex	Supported	Codex app-server owns the OpenAI turn, native thread resume, and native tool continuation.
OpenClaw channel routing and delivery	Supported	Telegram, Discord, Slack, WhatsApp, iMessage, and other channels stay outside the model runtime.
OpenClaw dynamic tools	Supported	Codex asks OpenClaw to execute these tools, so OpenClaw stays in the execution path.
Prompt and context plugins	Supported	OpenClaw builds prompt overlays and projects context into the Codex turn before starting or resuming the thread.
Context engine lifecycle	Supported	Assemble, ingest or after-turn maintenance, and context-engine compaction coordination run for Codex turns.
Dynamic tool hooks	Supported	before_tool_call, after_tool_call, and tool-result middleware run around OpenClaw-owned dynamic tools.
Lifecycle hooks	Supported as adapter observations	llm_input, llm_output, agent_end, before_compaction, and after_compaction fire with honest Codex-mode payloads.
Final-answer revision gate	Supported through the native hook relay	Codex Stop is relayed to before_agent_finalize; revise asks Codex for one more model pass before finalization.
Native shell, patch, and MCP block or observe	Supported through the native hook relay	Codex PreToolUse and PostToolUse are relayed for committed native tool surfaces, including MCP payloads on Codex app-server 0.125.0 or newer. Blocking is supported; argument rewriting is not.
Native permission policy	Supported through the native hook relay	Codex PermissionRequest can be routed through OpenClaw policy where the runtime exposes it. If OpenClaw returns no decision, Codex continues through its normal guardian or user approval path.
App-server trajectory capture	Supported	OpenClaw records the request it sent to app-server and the app-server notifications it receives.

Not supported in Codex runtime v1:

Surface	V1 boundary	Future path
Native tool argument mutation	Codex native pre-tool hooks can block, but OpenClaw does not rewrite Codex-native tool arguments.	Requires Codex hook/schema support for replacement tool input.
Editable Codex-native transcript history	Codex owns canonical native thread history. OpenClaw owns a mirror and can project future context, but should not mutate unsupported internals.	Add explicit Codex app-server APIs if native thread surgery is needed.
tool_result_persist for Codex-native tool records	That hook transforms OpenClaw-owned transcript writes, not Codex-native tool records.	Could mirror transformed records, but canonical rewrite needs Codex support.
Rich native compaction metadata	OpenClaw observes compaction start and completion, but does not receive a stable kept/dropped list, token delta, or summary payload.	Needs richer Codex compaction events.
Compaction intervention	Current OpenClaw compaction hooks are notification-level in Codex mode.	Add Codex pre/post compaction hooks if plugins need to veto or rewrite native compaction.
Byte-for-byte model API request capture	OpenClaw can capture app-server requests and notifications, but Codex core builds the final OpenAI API request internally.	Needs a Codex model-request tracing event or debug API.

Tools, media, and compaction

The Codex harness changes the low-level embedded agent executor only.

OpenClaw still builds the tool list and receives dynamic tool results from the harness. Text, images, video, music, TTS, approvals, and messaging-tool output continue through the normal OpenClaw delivery path.

The native hook relay is intentionally generic, but the v1 support contract is limited to the Codex-native tool and permission paths that OpenClaw tests. In the Codex runtime, that includes shell, patch, and MCP PreToolUse, PostToolUse, and PermissionRequest payloads. Do not assume every future Codex hook event is an OpenClaw plugin surface until the runtime contract names it.

For PermissionRequest, OpenClaw only returns explicit allow or deny decisions when policy decides. A no-decision result is not an allow. Codex treats it as no hook decision and falls through to its own guardian or user approval path.

Codex MCP tool approval elicitations are routed through OpenClaw's plugin approval flow when Codex marks _meta.codex_approval_kind as "mcp_tool_call". Codex request_user_input prompts are sent back to the originating chat, and the next queued follow-up message answers that native server request instead of being steered as extra context. Other MCP elicitation requests still fail closed.

Active-run queue steering maps onto Codex app-server turn/steer. With the default messages.queue.mode: "steer", OpenClaw batches queued chat messages for the configured quiet window and sends them as one turn/steer request in arrival order. Legacy queue mode sends separate turn/steer requests. Codex review and manual compaction turns can reject same-turn steering, in which case OpenClaw uses the followup queue when the selected mode allows fallback. See Steering queue.

When the selected model uses the Codex harness, native thread compaction is delegated to Codex app-server. OpenClaw keeps a transcript mirror for channel history, search, /new, /reset, and future model or harness switching. The mirror includes the user prompt, final assistant text, and lightweight Codex reasoning or plan records when the app-server emits them. Today, OpenClaw only records native compaction start and completion signals. It does not yet expose a human-readable compaction summary or an auditable list of which entries Codex kept after compaction.

Because Codex owns the canonical native thread, tool_result_persist does not currently rewrite Codex-native tool result records. It only applies when OpenClaw is writing an OpenClaw-owned session transcript tool result.

Media generation does not require PI. Image, video, music, PDF, TTS, and media understanding continue to use the matching provider/model settings such as agents.defaults.imageGenerationModel, videoGenerationModel, pdfModel, and messages.tts.

Troubleshooting

Codex does not appear as a normal /model provider: that is expected for new configs. Select an openai/gpt-* model with agentRuntime.id: "codex" (or a legacy codex/* ref), enable plugins.entries.codex.enabled, and check whether plugins.allow excludes codex.

OpenClaw uses PI instead of Codex: agentRuntime.id: "auto" can still use PI as the compatibility backend when no Codex harness claims the run. Set agentRuntime.id: "codex" to force Codex selection while testing. A forced Codex runtime fails instead of falling back to PI. Once Codex app-server is selected, its failures surface directly.

The app-server is rejected: upgrade Codex so the app-server handshake reports version 0.125.0 or newer. Same-version prereleases or build-suffixed versions such as 0.125.0-alpha.2 or 0.125.0+custom are rejected because the stable 0.125.0 protocol floor is what OpenClaw tests.

Model discovery is slow: lower plugins.entries.codex.config.discovery.timeoutMs or disable discovery.

WebSocket transport fails immediately: check appServer.url, authToken, and that the remote app-server speaks the same Codex app-server protocol version.

A non-Codex model uses PI: that is expected unless you forced agentRuntime.id: "codex" for that agent or selected a legacy codex/* ref. Plain openai/gpt-* and other provider refs stay on their normal provider path in auto mode. If you force agentRuntime.id: "codex", every embedded turn for that agent must be a Codex-supported OpenAI model.

Computer Use is installed but tools do not run: check /codex computer-use status from a fresh session. If a tool reports Native hook relay unavailable, use /new or /reset; if it persists, restart the gateway to clear stale native hook registrations. If computer-use.list_apps times out, restart Codex Computer Use or Codex Desktop and retry.

Related

• Agent harness plugins
• Agent runtimes
• Model providers
• OpenAI provider
• Status
• Plugin hooks
• Configuration reference
• Testing