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

# System Prompt Customization

> How system prompts are compiled and assigned to agents dynamically.

Agents are defined inside `~/.hiroshi/AGENTS.md` and load their instructions dynamically on session creation.

### AGENTS.md Layout Structure

```markdown theme={null}
## Developer
- Prompt: "You are a systems programmer. Write zero-warning Rust code."
- Allowed Tools: [cargo_check, git_manager]
```

Hiroshi parses the markdown file on startup:

* **System Prompts**: The prompt string is loaded into the model's system context.
* **Allowed Tools validation**: Pre-compiled list of allowed commands prevents authorization leaks.
* **Handoff parameters**: Rules specifying when to yield control to other agents.