# Provide context with GEMINI.md files

Context files, which use the default name `GEMINI.md`, are a powerful feature
for providing instructional context to the Gemini model. You can use these files
to give project-specific instructions, define a persona, or provide coding style
guides to make the AI's responses more accurate and tailored to your needs.

Instead of repeating instructions in every prompt, you can define them once in a
context file.

## Understand the context hierarchy

The CLI uses a hierarchical system to source context. It loads various context
files from several locations, concatenates the contents of all found files, and
sends them to the model with every prompt. The CLI loads files in the following
order:

1.  **Global context file:**
    - **Location:** `~/.gemini/GEMINI.md` (in your user home directory).
    - **Scope:** Provides default instructions for all your projects.

2.  **Environment and workspace context files:**
    - **Location:** The CLI searches for `GEMINI.md` files in your configured
      workspace directories and their parent directories.
    - **Scope:** Provides context relevant to the projects you are currently
      working on.

3.  **Just-in-time (JIT) context files:**
    - **Location:** When a tool accesses a file or directory, the CLI
      automatically scans for `GEMINI.md` files in that directory and its
      ancestors up to a trusted root.
    - **Scope:** Lets the model discover highly specific instructions for
      particular components only when they are needed.

The CLI footer displays the number of loaded context files, which gives you a
quick visual cue of the active instructional context.

### Example `GEMINI.md` file

Here is an example of what you can include in a `GEMINI.md` file at the root of
a TypeScript project:

```markdown
# Project: My TypeScript Library

## General Instructions

- When you generate new TypeScript code, follow the existing coding style.
- Ensure all new functions and classes have JSDoc comments.
- Prefer functional programming paradigms where appropriate.

## Coding Style

- Use 2 spaces for indentation.
- Prefix interface names with `I` (for example, `IUserService`).
- Always use strict equality (`===` and `!==`).
```

## Manage context with the `/memory` command

You can interact with the loaded context files by using the `/memory` command.

- **`/memory show`**: Displays the full, concatenated content of the current
  hierarchical memory. This lets you inspect the exact instructional context
  being provided to the model.
- **`/memory reload`**: Forces a re-scan and reload of all `GEMINI.md` files
  from all configured locations.

## Modularize context with imports

You can break down large `GEMINI.md` files into smaller, more manageable
components by importing content from other files using the `@file.md` syntax.
This feature supports both relative and absolute paths.

**Example `GEMINI.md` with imports:**

```markdown
# Main GEMINI.md file

This is the main content.

@./components/instructions.md

More content here.

@../shared/style-guide.md
```

For more details, see the [Memory Import Processor](../reference/memport.md)
documentation.

## Customize the context file name

While `GEMINI.md` is the default filename, you can configure this in your
`settings.json` file. To specify a different name or a list of names, use the
`context.fileName` property.

**Example `settings.json`:**

```json
{
  "context": {
    "fileName": ["AGENTS.md", "CONTEXT.md", "GEMINI.md"]
  }
}
```

## Next steps

- Learn about [Ignoring files](./gemini-ignore.md) to exclude content from the
  context system.
- Explore the [Memory tool](../tools/memory.md) to save persistent memories.
- See how to use [Custom commands](./custom-commands.md) to automate common
  prompts.
