Use this glossary as a quick reference for Codex terms across the app, CLI, IDE extension, cloud, SDK, and related integrations.
| Term | Definition | Applies to |
|---|---|---|
| Action | An operation performed by a person, ChatGPT, or Codex, such as editing a file, running a command, or using a connected service. | Desktop app, Web, Mobile, CLI, IDE extension, Cloud |
| Agent | The Codex agent that reasons over context, uses tools, and completes a task. | Desktop app, CLI, IDE extension, Cloud |
| AGENTS.md | Repository or user guidance file that gives Codex persistent instructions. | Desktop app, CLI, IDE extension, Cloud |
| Analytics dashboard | Admin hub for ChatGPT workspace adoption and Codex-focused reporting. | Enterprise |
| API key sign-in | Authentication using an OpenAI API key. | Desktop app, CLI, IDE extension |
| Approval policy | Rules for when Codex must ask before taking an action. | Desktop app, CLI, IDE extension |
| Approval request | Codex asking to allow a restricted action. | Desktop app, CLI, IDE extension |
| Apps (configuration) | Codex configuration and app-server fields that store connector settings under the `apps` name. | Desktop app, CLI, IDE extension |
| Appshot | Snapshot of the frontmost app window sent to a ChatGPT or Codex chat. | Desktop app |
| Auth cache | Locally stored login credentials reused by Codex. | Desktop app, CLI, IDE extension |
| Automatic approval review | Model-based review of eligible approval requests before they proceed. | Desktop app, CLI, IDE extension |
| Chat | A saved space for exchanging messages with ChatGPT or Codex, including shared context, results, and actions. Quick chat starts a ChatGPT chat from Codex. | Desktop app, Web, Mobile, CLI, IDE extension, Cloud |
| ChatGPT desktop app | Desktop app with ChatGPT and Codex, including Chat and Work modes, projects, file previews, scheduled tasks, and developer tools. | Desktop |
| ChatGPT sign-in | Authentication using a ChatGPT account and workspace permissions. | Desktop app, CLI, IDE extension, Cloud |
| Chronicle | Opt-in feature that builds memories from recent screen context. | Desktop app |
| Cloud | Mode where Codex works remotely in an OpenAI-managed environment. | Desktop app, IDE extension, Web |
| Cloud chat | A Codex chat that runs remotely in a cloud environment. | Cloud |
| Cloud environment | Configured container setup used for Codex cloud chats. | Cloud |
| Codex | OpenAI's coding agent for software development tasks. | Desktop app, CLI, IDE extension, Web, Cloud, SDK |
| Codex app-server | Local JSON-RPC server for embedding Codex threads, turns, approvals, history, and streamed events in custom clients. | Desktop app, IDE extension, SDK |
| Codex CLI | Terminal client for running Codex interactively or in scripts. | Terminal |
| Codex cloud | OpenAI-managed execution environment where Codex can work on repository tasks remotely. | Web, Desktop app, IDE extension |
| codex exec | CLI command for running Codex non-interactively from scripts or CI. | CLI |
| Codex IDE extension | Editor integration for using Codex inside IDEs like VS Code, JetBrains IDEs, Cursor, and Windsurf. | IDE |
| Codex SDK | Programmatic interface for building Codex-powered workflows or integrations. | SDK |
| Codex-managed worktree | A temporary worktree Codex creates and manages for a chat. | Desktop app |
| Compaction | Summarizing older context so long-running work can continue. | Desktop app, CLI, IDE extension, Cloud |
| Compliance API | API for exporting supported ChatGPT workspace records and audit metadata. | Enterprise |
| Computer Use | Desktop capability that lets ChatGPT interact with other applications through the UI. | Desktop app |
| Computer Use in the browser | Capability that lets ChatGPT operate the built-in browser directly. | Desktop app |
| config.toml | Local Codex configuration files. | Desktop app, CLI, IDE extension |
| Connected host | Computer or development environment that provides files, tools, and shell access for ChatGPT or Codex chats opened through Remote. | Desktop app, Mobile |
| Connector | A component of a plugin that connects ChatGPT or Codex to data and actions in an external service. | Desktop app (Work mode, Codex), Web (Work mode) |
| Container cache | Saved cloud container state reused to speed up future cloud chats. | Cloud |
| Context | Information Codex can use while working, such as files, prior messages, tool output, and instructions. | Desktop app, CLI, IDE extension, Cloud, SDK |
| Context window | The maximum amount of information the model can consider at once. | Desktop app, CLI, IDE extension, Cloud, SDK |
| Conversation | The ongoing exchange of messages and shared context between a person and ChatGPT or Codex within a chat. | Desktop app, Web, Mobile, CLI, IDE extension, Cloud |
| Custom agent | User-defined agent role with its own instructions and settings. | Desktop app, CLI |
| Deny-read rule | Filesystem permission rule that prevents Codex from reading sensitive paths or glob matches. | Desktop app, CLI, IDE extension, Enterprise |
| Diff | Set of Git file changes shown for inspection, comments, staging, or reverting. | Desktop app, Git, Review |
| Domain allowlist | Set of domains Codex cloud can reach when agent internet access is enabled. | Cloud |
| Environment (local) | Desktop app configuration that tells Codex how to set up worktrees for a project. | Desktop app, Worktree |
| Environment variable | Runtime configuration value available during task execution. | Cloud, CLI, IDE extension |
| Ephemeral session | Non-interactive run that skips saving session state after it completes. | CLI |
| Fast mode | Speed setting that makes supported models respond faster at a higher credit cost. | CLI, IDE extension |
| Filesystem permission | Permission profile rule that grants or denies read and write access to paths. | Desktop app, CLI, IDE extension |
| Finding | A notable result or issue surfaced by a scheduled task. | Desktop app |
| Full access | Mode where Codex runs without normal sandbox restrictions. | Desktop app, CLI, IDE extension |
| Git worktree | A second checkout of the same repository for parallel branch work. | Desktop app, Git |
| Handoff | Moving a chat and its work between Local and Worktree. | Desktop app |
| Heartbeat | A recurring scheduled task that returns ChatGPT to the same chat. | Desktop app |
| Hook | A lifecycle handler that runs when a Codex event matches, such as tool use, permission requests, or when a turn stops. | Desktop app, CLI, IDE extension |
| Hook event | Lifecycle point where configured hook handlers can run. | Desktop app, CLI, IDE extension |
| Hunk | Contiguous section of a diff that can be staged, unstaged, or reverted independently. | Desktop app, Git, Review |
| Inline comment | Line-specific feedback attached to a diff. | Desktop app |
| Live web search | Real-time web lookup for current information. | Desktop app, CLI, IDE extension |
| Local | Mode where Codex works on the user's computer. | Desktop app, CLI, IDE extension |
| Local chat | A ChatGPT or Codex chat that runs on the user's machine. | Desktop app, CLI, IDE extension |
| Maintenance script | Optional script run when a cached cloud container resumes. | Cloud |
| Managed configuration | Organization-controlled Codex defaults and restrictions. | Enterprise |
| MCP | Model Context Protocol, a standard for connecting Codex to external tools and context. | Desktop app, CLI, IDE extension |
| MCP resource | Readable context exposed by an MCP server for Codex to inspect. | Desktop app, CLI, IDE extension |
| MCP server | External tool or context provider exposed through MCP. | Desktop app, CLI, IDE extension |
| MCP tool | Action exposed by an MCP server that Codex can call during a task. | Desktop app, CLI, IDE extension |
| MDM | Mobile device management tooling for distributing device profiles and managed Codex settings. | Enterprise |
| Memories | Locally stored context Codex can reuse across sessions. | Desktop app, CLI, IDE extension |
| Model | The AI model Codex uses for reasoning and tool work. | Desktop app, CLI, IDE extension, Cloud, SDK |
| Network access | Permission for commands or environments to reach the internet. | Desktop app, CLI, IDE extension, Cloud |
| Network policy | Domain-based allow and deny rules that constrain sandboxed outbound network traffic. | Desktop app, CLI, IDE extension |
| Non-interactive mode | CLI mode for running Codex from scripts or CI. | CLI |
| Output schema | JSON Schema passed to `codex exec` to constrain the final response. | CLI |
| Permanent worktree | A long-lived worktree kept as its own project. | Desktop app |
| Permission profile | Named least-privilege policy that combines filesystem and network rules for local command execution. | Desktop app, CLI, IDE extension |
| Plan | Codex's proposed or tracked steps for completing a task. | Desktop app, CLI, IDE extension, Cloud |
| Plugin | An installable bundle of capabilities such as skills, connectors, and tools. | Desktop app (Work mode, Codex), Web (Work mode), CLI |
| Plugin manifest | Plugin metadata file that identifies a plugin and points to bundled skills, connector mappings, MCP servers, hooks, and metadata. | Plugin authoring |
| Prefix rule | Command-rule pattern that allows, prompts for, or forbids matching command prefixes. | Desktop app, CLI, IDE extension, Enterprise |
| Profile | Named configuration preset for Codex. | CLI, IDE extension |
| Progressive disclosure | Loading skill details only when needed to preserve context. | Desktop app, CLI, IDE extension |
| Project | A group of related chats and shared sources, or a local folder used for file-based work. | Desktop app |
| Prompt | A question, instruction, or goal sent to ChatGPT or Codex. | Desktop app, CLI, IDE extension, Cloud, SDK |
| Pull request review | Codex review of changes or feedback on a pull request. | Desktop app, CLI, GitHub |
| RBAC | Role-based access control for workspace permissions. | Enterprise |
| Read-only mode | Mode where Codex can inspect but not modify without approval. | Desktop app, CLI, IDE extension |
| Reasoning effort | Setting that controls how much reasoning budget a model uses. | Desktop app, CLI, IDE extension, SDK |
| Remote connection | Connection that lets you access ChatGPT or Codex chats on another device through a connected host. | Desktop app, Mobile |
| requirements.toml | Admin-enforced requirements file for managed Codex setups. | Enterprise |
| Review pane | Desktop app view for inspecting diffs, comments, and Git changes. | Desktop app |
| Rules | Policies that allow, prompt for, or deny command prefixes or permission exceptions. | Desktop app, CLI, IDE extension |
| Sandbox | Enforced boundary limiting what Codex commands can access or modify. | Desktop app, CLI, IDE extension |
| Sandbox mode | Configuration that defines Codex's filesystem and network limits. | Desktop app, CLI, IDE extension |
| Sandbox preset | SDK shorthand for common sandbox policies such as read-only, workspace-write, or full access. | SDK |
| Schedule | The timing rule for a scheduled task. | Desktop app |
| Scheduled run | One execution of a scheduled task, including its status and any resulting findings. | Desktop app, Web |
| Scheduled task | A prompt ChatGPT runs at a future time or on a recurring schedule, with its own settings and run history. | Desktop app, Web |
| Scheduled task in a chat | A scheduled task that uses an existing chat's context and returns each run's results to that chat. | Desktop app, Web |
| Secret | Encrypted value available to setup scripts but removed before the agent phase. | Cloud |
| Setup script | Script run before the agent starts to install dependencies or prepare tools. | Desktop app worktrees |
| Skill | Reusable workflow package with instructions and optional scripts or references. | Desktop app, CLI, IDE extension |
| Skill invocation | Explicit or implicit activation of a skill. | Desktop app, CLI, IDE extension |
| Slash command | Command entered with a leading slash to control or inspect a Codex CLI session. | CLI |
| Standalone scheduled task | Scheduled task whose runs each start a new chat and report findings in Triage. | Desktop app, Web |
| Standalone task | A Codex task that isn't grouped within a project. | Desktop app, CLI, IDE extension, Cloud |
| STDIO MCP server | MCP server launched as a local process by a configured command and arguments. | CLI, IDE extension |
| Streamable HTTP MCP server | MCP server reached over HTTP, optionally with bearer token or OAuth authentication. | CLI, IDE extension |
| Subagent | Specialized child agent spawned to work on part of a task. | Desktop app, CLI |
| Subagent workflow | Workflow where Codex runs delegated agents in parallel and combines their results. | Desktop app, CLI |
| Task | A defined outcome ChatGPT or Codex works toward, such as fixing a bug, creating a document, or researching a topic. | Desktop app, Web, Mobile, CLI, IDE extension, Cloud |
| Thread | A technical object in Codex app-server APIs that contains turns and stored conversation history. | App-server, SDK |
| Thread fork | New thread branched from the stored history of an existing thread. | App-server, SDK |
| Turn | One exchange in a chat, usually a user prompt plus the agent's response and actions. | Desktop app, CLI, IDE extension, Cloud, SDK |
| Universal image | Default Codex cloud container image with common tools preinstalled. | Cloud |
| Web search cache | Pre-indexed search results Codex can use without live browsing. | Desktop app, CLI, IDE extension |
| Work mode | Mode in ChatGPT for research, analysis, and creating documents, presentations, spreadsheets, and other finished work. | Desktop app, Web |
| Worktree | Mode where Codex isolates changes in a separate Git worktree. | Desktop app |
| Writable roots | Directories Codex is allowed to modify. | Desktop app, CLI, IDE extension |
Term
ActionDefinition
An operation performed by a person, ChatGPT, or Codex, such as editing a file, running a command, or using a connected service.
Applies to
Desktop app, Web, Mobile, CLI, IDE extension, CloudTerm
AgentDefinition
The Codex agent that reasons over context, uses tools, and completes a task.
Applies to
Desktop app, CLI, IDE extension, CloudTerm
AGENTS.mdDefinition
Repository or user guidance file that gives Codex persistent instructions.
Applies to
Desktop app, CLI, IDE extension, CloudDefinition
Admin hub for ChatGPT workspace adoption and Codex-focused reporting.
Applies to
EnterpriseTerm
API key sign-inDefinition
Authentication using an OpenAI API key.
Applies to
Desktop app, CLI, IDE extensionTerm
Approval policyDefinition
Rules for when Codex must ask before taking an action.
Applies to
Desktop app, CLI, IDE extensionTerm
Approval requestDefinition
Codex asking to allow a restricted action.
Applies to
Desktop app, CLI, IDE extensionDefinition
Codex configuration and app-server fields that store connector settings under the `apps` name.
Applies to
Desktop app, CLI, IDE extensionTerm
AppshotDefinition
Snapshot of the frontmost app window sent to a ChatGPT or Codex chat.
Applies to
Desktop appTerm
Auth cacheDefinition
Locally stored login credentials reused by Codex.
Applies to
Desktop app, CLI, IDE extensionDefinition
Model-based review of eligible approval requests before they proceed.
Applies to
Desktop app, CLI, IDE extensionTerm
ChatDefinition
A saved space for exchanging messages with ChatGPT or Codex, including shared context, results, and actions. Quick chat starts a ChatGPT chat from Codex.
Applies to
Desktop app, Web, Mobile, CLI, IDE extension, CloudDefinition
Desktop app with ChatGPT and Codex, including Chat and Work modes, projects, file previews, scheduled tasks, and developer tools.
Applies to
DesktopTerm
ChatGPT sign-inDefinition
Authentication using a ChatGPT account and workspace permissions.
Applies to
Desktop app, CLI, IDE extension, CloudTerm
ChronicleDefinition
Opt-in feature that builds memories from recent screen context.
Applies to
Desktop appTerm
CloudDefinition
Mode where Codex works remotely in an OpenAI-managed environment.
Applies to
Desktop app, IDE extension, WebDefinition
Configured container setup used for Codex cloud chats.
Applies to
CloudTerm
CodexDefinition
OpenAI's coding agent for software development tasks.
Applies to
Desktop app, CLI, IDE extension, Web, Cloud, SDKTerm
Codex app-serverDefinition
Local JSON-RPC server for embedding Codex threads, turns, approvals, history, and streamed events in custom clients.
Applies to
Desktop app, IDE extension, SDKTerm
Codex CLIDefinition
Terminal client for running Codex interactively or in scripts.
Applies to
TerminalTerm
Codex cloudDefinition
OpenAI-managed execution environment where Codex can work on repository tasks remotely.
Applies to
Web, Desktop app, IDE extensionTerm
codex execDefinition
CLI command for running Codex non-interactively from scripts or CI.
Applies to
CLIDefinition
Editor integration for using Codex inside IDEs like VS Code, JetBrains IDEs, Cursor, and Windsurf.
Applies to
IDETerm
Codex SDKDefinition
Programmatic interface for building Codex-powered workflows or integrations.
Applies to
SDKDefinition
A temporary worktree Codex creates and manages for a chat.
Applies to
Desktop appTerm
CompactionDefinition
Summarizing older context so long-running work can continue.
Applies to
Desktop app, CLI, IDE extension, CloudTerm
Compliance APIDefinition
API for exporting supported ChatGPT workspace records and audit metadata.
Applies to
EnterpriseTerm
Computer UseDefinition
Desktop capability that lets ChatGPT interact with other applications through the UI.
Applies to
Desktop appDefinition
Capability that lets ChatGPT operate the built-in browser directly.
Applies to
Desktop appTerm
Connected hostDefinition
Computer or development environment that provides files, tools, and shell access for ChatGPT or Codex chats opened through Remote.
Applies to
Desktop app, MobileTerm
ConnectorDefinition
A component of a plugin that connects ChatGPT or Codex to data and actions in an external service.
Applies to
Desktop app (Work mode, Codex), Web (Work mode)Term
Container cacheDefinition
Saved cloud container state reused to speed up future cloud chats.
Applies to
CloudTerm
ContextDefinition
Information Codex can use while working, such as files, prior messages, tool output, and instructions.
Applies to
Desktop app, CLI, IDE extension, Cloud, SDKTerm
Context windowDefinition
The maximum amount of information the model can consider at once.
Applies to
Desktop app, CLI, IDE extension, Cloud, SDKTerm
ConversationDefinition
The ongoing exchange of messages and shared context between a person and ChatGPT or Codex within a chat.
Applies to
Desktop app, Web, Mobile, CLI, IDE extension, CloudTerm
Custom agentDefinition
User-defined agent role with its own instructions and settings.
Applies to
Desktop app, CLITerm
Deny-read ruleDefinition
Filesystem permission rule that prevents Codex from reading sensitive paths or glob matches.
Applies to
Desktop app, CLI, IDE extension, EnterpriseTerm
DiffDefinition
Set of Git file changes shown for inspection, comments, staging, or reverting.
Applies to
Desktop app, Git, ReviewTerm
Domain allowlistDefinition
Set of domains Codex cloud can reach when agent internet access is enabled.
Applies to
CloudDefinition
Desktop app configuration that tells Codex how to set up worktrees for a project.
Applies to
Desktop app, WorktreeDefinition
Runtime configuration value available during task execution.
Applies to
Cloud, CLI, IDE extensionDefinition
Non-interactive run that skips saving session state after it completes.
Applies to
CLITerm
Fast modeDefinition
Speed setting that makes supported models respond faster at a higher credit cost.
Applies to
CLI, IDE extensionDefinition
Permission profile rule that grants or denies read and write access to paths.
Applies to
Desktop app, CLI, IDE extensionTerm
Full accessDefinition
Mode where Codex runs without normal sandbox restrictions.
Applies to
Desktop app, CLI, IDE extensionTerm
Git worktreeDefinition
A second checkout of the same repository for parallel branch work.
Applies to
Desktop app, GitTerm
HeartbeatDefinition
A recurring scheduled task that returns ChatGPT to the same chat.
Applies to
Desktop appTerm
HookDefinition
A lifecycle handler that runs when a Codex event matches, such as tool use, permission requests, or when a turn stops.
Applies to
Desktop app, CLI, IDE extensionTerm
Hook eventDefinition
Lifecycle point where configured hook handlers can run.
Applies to
Desktop app, CLI, IDE extensionTerm
HunkDefinition
Contiguous section of a diff that can be staged, unstaged, or reverted independently.
Applies to
Desktop app, Git, ReviewTerm
Live web searchDefinition
Real-time web lookup for current information.
Applies to
Desktop app, CLI, IDE extensionTerm
LocalDefinition
Mode where Codex works on the user's computer.
Applies to
Desktop app, CLI, IDE extensionTerm
Local chatDefinition
A ChatGPT or Codex chat that runs on the user's machine.
Applies to
Desktop app, CLI, IDE extensionDefinition
Optional script run when a cached cloud container resumes.
Applies to
CloudDefinition
Organization-controlled Codex defaults and restrictions.
Applies to
EnterpriseTerm
MCPDefinition
Model Context Protocol, a standard for connecting Codex to external tools and context.
Applies to
Desktop app, CLI, IDE extensionTerm
MCP resourceDefinition
Readable context exposed by an MCP server for Codex to inspect.
Applies to
Desktop app, CLI, IDE extensionTerm
MCP serverDefinition
External tool or context provider exposed through MCP.
Applies to
Desktop app, CLI, IDE extensionTerm
MCP toolDefinition
Action exposed by an MCP server that Codex can call during a task.
Applies to
Desktop app, CLI, IDE extensionTerm
MDMDefinition
Mobile device management tooling for distributing device profiles and managed Codex settings.
Applies to
EnterpriseTerm
MemoriesDefinition
Locally stored context Codex can reuse across sessions.
Applies to
Desktop app, CLI, IDE extensionTerm
ModelDefinition
The AI model Codex uses for reasoning and tool work.
Applies to
Desktop app, CLI, IDE extension, Cloud, SDKTerm
Network accessDefinition
Permission for commands or environments to reach the internet.
Applies to
Desktop app, CLI, IDE extension, CloudTerm
Network policyDefinition
Domain-based allow and deny rules that constrain sandboxed outbound network traffic.
Applies to
Desktop app, CLI, IDE extensionTerm
Output schemaDefinition
JSON Schema passed to `codex exec` to constrain the final response.
Applies to
CLIDefinition
Named least-privilege policy that combines filesystem and network rules for local command execution.
Applies to
Desktop app, CLI, IDE extensionTerm
PlanDefinition
Codex's proposed or tracked steps for completing a task.
Applies to
Desktop app, CLI, IDE extension, CloudTerm
PluginDefinition
An installable bundle of capabilities such as skills, connectors, and tools.
Applies to
Desktop app (Work mode, Codex), Web (Work mode), CLITerm
Plugin manifestDefinition
Plugin metadata file that identifies a plugin and points to bundled skills, connector mappings, MCP servers, hooks, and metadata.
Applies to
Plugin authoringTerm
Prefix ruleDefinition
Command-rule pattern that allows, prompts for, or forbids matching command prefixes.
Applies to
Desktop app, CLI, IDE extension, EnterpriseDefinition
Loading skill details only when needed to preserve context.
Applies to
Desktop app, CLI, IDE extensionTerm
ProjectDefinition
A group of related chats and shared sources, or a local folder used for file-based work.
Applies to
Desktop appTerm
PromptDefinition
A question, instruction, or goal sent to ChatGPT or Codex.
Applies to
Desktop app, CLI, IDE extension, Cloud, SDKDefinition
Codex review of changes or feedback on a pull request.
Applies to
Desktop app, CLI, GitHubTerm
Read-only modeDefinition
Mode where Codex can inspect but not modify without approval.
Applies to
Desktop app, CLI, IDE extensionTerm
Reasoning effortDefinition
Setting that controls how much reasoning budget a model uses.
Applies to
Desktop app, CLI, IDE extension, SDKDefinition
Connection that lets you access ChatGPT or Codex chats on another device through a connected host.
Applies to
Desktop app, MobileDefinition
Admin-enforced requirements file for managed Codex setups.
Applies to
EnterpriseTerm
Review paneDefinition
Desktop app view for inspecting diffs, comments, and Git changes.
Applies to
Desktop appTerm
RulesDefinition
Policies that allow, prompt for, or deny command prefixes or permission exceptions.
Applies to
Desktop app, CLI, IDE extensionTerm
SandboxDefinition
Enforced boundary limiting what Codex commands can access or modify.
Applies to
Desktop app, CLI, IDE extensionTerm
Sandbox modeDefinition
Configuration that defines Codex's filesystem and network limits.
Applies to
Desktop app, CLI, IDE extensionTerm
Sandbox presetDefinition
SDK shorthand for common sandbox policies such as read-only, workspace-write, or full access.
Applies to
SDKTerm
Scheduled runDefinition
One execution of a scheduled task, including its status and any resulting findings.
Applies to
Desktop app, WebTerm
Scheduled taskDefinition
A prompt ChatGPT runs at a future time or on a recurring schedule, with its own settings and run history.
Applies to
Desktop app, WebDefinition
A scheduled task that uses an existing chat's context and returns each run's results to that chat.
Applies to
Desktop app, WebTerm
SecretDefinition
Encrypted value available to setup scripts but removed before the agent phase.
Applies to
CloudTerm
Setup scriptDefinition
Script run before the agent starts to install dependencies or prepare tools.
Applies to
Desktop app worktreesTerm
SkillDefinition
Reusable workflow package with instructions and optional scripts or references.
Applies to
Desktop app, CLI, IDE extensionTerm
Skill invocationDefinition
Explicit or implicit activation of a skill.
Applies to
Desktop app, CLI, IDE extensionTerm
Slash commandDefinition
Command entered with a leading slash to control or inspect a Codex CLI session.
Applies to
CLIDefinition
Scheduled task whose runs each start a new chat and report findings in Triage.
Applies to
Desktop app, WebTerm
Standalone taskDefinition
A Codex task that isn't grouped within a project.
Applies to
Desktop app, CLI, IDE extension, CloudTerm
STDIO MCP serverDefinition
MCP server launched as a local process by a configured command and arguments.
Applies to
CLI, IDE extensionDefinition
MCP server reached over HTTP, optionally with bearer token or OAuth authentication.
Applies to
CLI, IDE extensionTerm
SubagentDefinition
Specialized child agent spawned to work on part of a task.
Applies to
Desktop app, CLIDefinition
Workflow where Codex runs delegated agents in parallel and combines their results.
Applies to
Desktop app, CLITerm
TaskDefinition
A defined outcome ChatGPT or Codex works toward, such as fixing a bug, creating a document, or researching a topic.
Applies to
Desktop app, Web, Mobile, CLI, IDE extension, CloudTerm
ThreadDefinition
A technical object in Codex app-server APIs that contains turns and stored conversation history.
Applies to
App-server, SDKTerm
Thread forkDefinition
New thread branched from the stored history of an existing thread.
Applies to
App-server, SDKTerm
TurnDefinition
One exchange in a chat, usually a user prompt plus the agent's response and actions.
Applies to
Desktop app, CLI, IDE extension, Cloud, SDKTerm
Universal imageDefinition
Default Codex cloud container image with common tools preinstalled.
Applies to
CloudTerm
Web search cacheDefinition
Pre-indexed search results Codex can use without live browsing.
Applies to
Desktop app, CLI, IDE extensionTerm
Work modeDefinition
Mode in ChatGPT for research, analysis, and creating documents, presentations, spreadsheets, and other finished work.
Applies to
Desktop app, WebTerm
WorktreeDefinition
Mode where Codex isolates changes in a separate Git worktree.
Applies to
Desktop appTerm
Writable rootsDefinition
Directories Codex is allowed to modify.
Applies to
Desktop app, CLI, IDE extension