create-agent

Creates and configures agent.yaml files, writes SOUL.md personality definitions, and sets up agent directory structures with skills, tools, and knowledge. Use when the user wants to configure an agent, create agent.yaml, write SOUL.md, set up agent directory structure, or customize agent settings.

Quality

100%

Does it follow best practices?

Run evals on this skill

Adds up to 20 points to the overall score

View guide

Securityby

Passed

No findings from the security scan

Create & Configure Agents

Quick Start

Create directory structure: mkdir -p my-agent/skills
Write agent.yaml with required fields (see below)
Create SOUL.md with agent identity
Add skills, tools, and knowledge as needed
Validate: opengap validate -d ./my-agent

agent.yaml Reference

Required Fields

spec_version: "0.1.0"
name: my-agent          # Unique identifier
version: 1.0.0          # Semantic version
description: What this agent does

Model Configuration

model:
  preferred: claude-sonnet-4-5-20250929
  fallback:
    - claude-haiku-4-5-20251001
  constraints:
    temperature: 0.2     # 0.0 - 1.0
    max_tokens: 4096
    top_p: 0.9

Skills & Tools

skills:
  - code-review          # Must match directory name in skills/
  - security-audit

tools:
  - lint-check           # Must match filename in tools/ (without .yaml)

Runtime

runtime:
  max_turns: 20          # Max conversation turns
  timeout: 120           # Seconds

Sub-Agents

agents:
  reviewer:
    description: Reviews code quality
    delegation:
      mode: auto
      triggers:
        - "review this"

Writing a Good SOUL.md

A SOUL.md should have these sections:

Core Identity — Who is this agent? One clear sentence.
Communication Style — How does it talk? (direct, friendly, formal, etc.)
Values & Principles — What does it prioritize?
Domain Expertise — What does it know?
Collaboration Style — How does it work with the user?

Writing RULES.md

Structure as:

Must Always — Non-negotiable behaviors
Must Never — Hard boundaries
Output Constraints — Formatting rules
Interaction Boundaries — Scope limits

Adding Skills

Create skills/<name>/SKILL.md:

---
name: my-skill
description: What this skill does
license: MIT
allowed-tools: Read Edit Grep
metadata:
  version: "1.0.0"
---

# Instructions
[Detailed instructions for using this skill]

Adding Tools

Create tools/<name>.yaml:

name: my-tool
description: What this tool does
input_schema:
  type: object
  properties:
    query:
      type: string
      description: Search query
  required:
    - query

Adding Knowledge

Create knowledge/index.yaml:

documents:
  - path: reference.md
    always_load: true    # Include in system prompt
  - path: appendix.md
    always_load: false   # Available on demand

Repository: open-gitagent/opengap
Path: examples/gitagent-helper/skills/create-agent/SKILL.md
Commit: d7a8e2e

Last updated: 4 days ago
First committed: 2 months ago

Is this your skill?

If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.