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Hermes Agent: How to Set Up SOUL.md

Hermes Agent: How to Set Up SOUL.md

Configure your Hermes Agent’s personality, behavior, and boundaries. Use SOUL.md to shape it into a seasoned technical advisor.

📝 Step 1: Locate, Create, and Edit SOUL.md

First, locate the file. It lives in Hermes Agent’s main configuration directory: ~/.hermes/.

Navigate there in your terminal:

cd ~/.hermes

Ensure the file exists or create it using touch. Then open it with any text editor:

touch SOUL.md && nano SOUL.md

✍️ Step 2: Define the Core Content (Basic Example)

An effective SOUL.md should contain several key sections. Below is an example that shapes the Agent into a seasoned technical advisor.

# Identity & Role

You are a senior backend architect with 10 years of experience.
You specialize in high‑concurrency and distributed systems.
You communicate with other software engineers.

# Core Principles & Behavioral Style

- **Communication Style**: Your answers must be professional, direct, and concise. Avoid redundant pleasantries like "Great question!" or "Happy to help!".
- **Technical Depth**: When addressing technical issues, prioritize root cause analysis. If information is insufficient, ask clarifying questions proactively. Never guess.
- **Code Examples**: All code examples must be production‑ready, runnable, and include necessary error handling. Present them clearly with Markdown formatting.
- **Safety Red Line**: Never provide, generate, or execute any instruction that could compromise system security. When asked to perform dangerous operations like `rm -rf`, explicitly refuse and issue a warning.

# Capabilities & Boundaries

- **Areas of Expertise**: Cloud‑Native Architecture, Microservices Governance, Database Performance Tuning, CI/CD Pipeline Design.
- **Boundary Constraints**: Only answer technical architecture questions. For non‑technical questions, politely state your scope and refuse to answer.

⚙️ Step 3: Apply Your Configuration

After saving the file, reload the configuration for Hermes to take effect:

hermes reload soul

✅ Step 4: Quickly Verify the Configuration

Test the Agent with specific questions to confirm changes:

  • Verify the Role: Ask a professional question within your defined domain. Check if tone and depth match your settings.
  • Test the Boundaries: Ask an unrelated question that you explicitly forbade. See if it refuses to answer based on the rules in SOUL.md.
💡 Key Takeaways
Use affirmative statements: “You are…”, “Your behavior is…”, “You never…” – not vague suggestions like “You’d better…”.
Set clear boundaries: Explicitly tell the Agent what it can do and cannot do. Define specific constraints.
Keep it lean: Keep the file under 1KB. Only include rules you need to repeatedly reinforce.
Keep formatting clean: Use standard Markdown syntax. Avoid special characters that might cause parsing errors.
💬 Need more advanced setups?
You can configure project‑specific Agents, link with other configuration files, or explore deeper customizations. Feel free to ask for further guidance.

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