> ## Documentation Index
> Fetch the complete documentation index at: https://docs.zerotwo.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Glossary

Use this glossary as a quick reference for ZeroTwo terms across desktop, web, mobile, and cloud.

| Term                                            | Surfaces                    | Definition                                                                                                              |
| ----------------------------------------------- | --------------------------- | ----------------------------------------------------------------------------------------------------------------------- |
| **[Action](/agent-approvals-security)**         | Desktop, Web, Mobile, Cloud | An operation performed by a person or ZeroTwo, such as editing a file, running a command, or using a connected service. |
| **[AGENTS.md](/agent-configuration/agents-md)** | Desktop                     | Project instruction file ZeroTwo can load for Cowork and ZeroCode (also `ZEROTWO.md` or `CLAUDE.md`).                   |
| **[Automation](/automations)**                  | Desktop, Web, Mobile        | A scheduled or triggered task ZeroTwo can run later.                                                                    |
| **[Chat](/projects#start-a-chat)**              | Desktop, Web, Mobile, Cloud | A saved thread of messages with ZeroTwo, including shared context and results.                                          |
| **[Cloud](/cloud)**                             | Cloud                       | Run or review work when you are away from your local machine.                                                           |
| **[Connector](/extend/mcp)**                    | Desktop, Web                | An integration that connects ZeroTwo to an external app or MCP server.                                                  |
| **[Cowork](/get-started-with-cowork)**          | Desktop                     | Desktop mode for completing multi-step work with local folders, browser, and tools.                                     |
| **[Memory](/customization/memories)**           | Desktop, Web                | Durable preferences and facts ZeroTwo can reuse across chats.                                                           |
| **[Model](/models)**                            | All                         | The language or media model selected for a chat or run.                                                                 |
| **[Permission mode](/permission-modes)**        | Desktop                     | How much file and command access ZeroTwo has by default.                                                                |
| **[Plugin](/plugins)**                          | Desktop, Web                | An installable bundle of skills, agents, connectors, or tools.                                                          |
| **[Project](/projects)**                        | Desktop, Web, Mobile        | A container for related chats, files, and instructions.                                                                 |
| **[Sandbox](/sandboxing)**                      | Desktop                     | Isolation model for commands and file tools on your machine.                                                            |
| **[Sites](/sites)**                             | Desktop, Web                | Plugin and workflow for building and publishing sites with ZeroTwo.                                                     |
| **[Skill](/build-skills)**                      | Desktop, Web                | Reusable workflow package with instructions and optional assets.                                                        |
| **[Slash command](/reference/slash-commands)**  | Desktop                     | Command entered with a leading `/` to control or inspect a session.                                                     |
| **[Subagent](/agent-configuration/subagents)**  | Desktop, Web                | A specialized agent ZeroTwo spawns for parallel or delegated work.                                                      |
| **[Work](/get-started-with-cowork)**            | Web                         | Web mode for multi-step tasks with a clear reviewable outcome.                                                          |
| **[ZeroCode](/app)**                            | Desktop                     | Developer-focused mode for codebase work, diffs, terminal, and reviews.                                                 |
| **[ZeroTwo](/overview)**                        | All                         | The ZeroTwo product across desktop, web, mobile, and cloud.                                                             |