Create agent

Skill open-gitagent/opengap/examples/gitagent-helper/skills/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.From its SKILL.md

Install

npx -y skills add open-gitagent/opengap --skill create-agent

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

One thing to look at

runs commandsInstructs the agent to run 2 commands, including `mkdir -p my-agent/skills` and 1 more.

What its file declares

Copied from the file, not written here

The file declares its own license as MIT. That is the author’s claim about this one file, and it is not the same thing as the license GitHub reports for the repository, which is listed with the other numbers below.

SKILL.md

2.8 KB, 668 tokens by cl100k_base, as published. Nobody here has run it

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

What ships with it

Read from the repository

Just SKILL.md. No reference files, no scripts.