create-gemini-cli-subagents
Expert guide for defining, creating, and invoking custom subagents in Gemini CLI. Trigger this skill when the user wants to create a new specialist agent, define a custom subagent, or learn how to delegate tasks to specialist agents within the Gemini CLI environment.
What this skill does
# Create Gemini CLI Subagents
This skill provides the instructions for creating custom **Subagents** (specialist agents) within the **Gemini CLI**.
## 1. Agent Definition
Subagents are defined as Markdown files (`.md`) with YAML frontmatter. These files act as the system instructions for a new specialist agent that can be invoked as a tool.
### Location
- **Project-level**: `.gemini/agents/*.md` (shared with the team via git).
- **User-level**: `~/.gemini/agents/*.md` (personal agents available in all sessions).
### File Format
The file MUST start with YAML frontmatter. The body of the markdown file becomes the agent's **System Prompt**.
```markdown
---
name: my-special-agent
description: Specialized in doing specific tasks. This description is used by the main agent to decide when to invoke this subagent.
kind: local
tools:
- read_file
- grep_search
model: inherit
temperature: 0.2
max_turns: 10
---
You are a specialist agent. Your job is to...
```
*Note: `name` (unique slug, a-z, 0-9, -, _) and `description` are required.*
## 2. Configuration
Ensure subagents are enabled in the Gemini CLI settings (either in the project or user `.gemini/settings.json`):
```json
{
"experimental": {
"enableAgents": true
}
}
```
## 3. Activation
After creating or modifying a subagent file, you **MUST** inform the user to run the following command in their CLI to load the new definitions:
```bash
/agents refresh
```
## 4. Usage & Delegation
Once refreshed, the subagent becomes available as a tool matching its `name`.
- **Delegation**: You can delegate complex, repetitive, or high-volume tasks to the subagent by calling its tool.
- **Reporting**: Subagents return a summary of their work, which keeps the main session context clean and focused.
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