agent-creator

Agent Creator scaffolds a complete Claude Code expert agent: frontmatter (name, description, model, tools, skills, hooks), the mandatory Agent Workflow section, hook scripts, and marketplace registration. It covers three flows -- creating a brand-new domain/framework expert, adapting an existing agent to a new stack, and updating an agent's skills or hooks -- each ending with a `fuse-ai-pilot:sniper` validation pass.

It does not create the skills an agent references -- for that, use skill-creator; agent-creator only wires the agent frontmatter and workflow around skills that already exist or are created alongside it.

Agent Creator

Agent Workflow (MANDATORY)

Before ANY agent creation, delegate via Agent — spawn 2 agents in parallel (single message, 2 Agent calls). Generated agents carry Agent and SendMessage in their tools, so this same pattern is what they must use internally too:

1. fuse-ai-pilot:explore-codebase - Check existing agents, analyze patterns
2. fuse-ai-pilot:research-expert - Fetch latest agent conventions

mcp__context7__query-docs is a direct MCP call, not a spawned agent — invoke it directly (alongside the 2 Task calls) to get examples from existing agents.

After creation, run fuse-ai-pilot:sniper for validation.

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Overview

Action	When to Use
New Agent	New domain/framework expert needed
Adapt	Copy from similar agent (Next.js → React)
Update	Add skills, modify hooks

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Critical Rules

1. ALL content in English - Never French or other languages
2. Frontmatter complete - name, description, model, tools, skills, hooks
3. Agent Workflow section - Always first content section
4. SOLID rules reference - Link to solid-[stack] skill
5. Register in marketplace.json - Or agent won't load
6. Hook scripts executable - chmod +x
7. Output Format section mandatory - Every generated agent must define a standard ## Output Format section (status, files_changed, errors, sources) — an agent invoked by a lead must return structured data, not prose

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Architecture

plugins/<plugin-name>/
├── agents/
│   └── <agent-name>.md      # Agent definition
├── skills/
│   ├── skill-a/
│   └── solid-[stack]/
├── scripts/
│   └── validate-*.sh        # Hook scripts
└── .claude-plugin/
    └── plugin.json

→ See architecture.md for details

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Reference Guide

Concepts

Topic	Reference	When to Consult
Architecture	architecture.md	Understanding agent structure
Frontmatter	frontmatter.md	YAML configuration
Required Sections	required-sections.md	Mandatory content
Hooks	hooks.md	Pre/Post tool validation
Registration	registration.md	marketplace.json

Templates

Template	When to Use
agent-template.md	Creating new agent
hook-scripts.md	Validation scripts

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Quick Reference

Create New Agent

# 1. Research existing agents
→ explore-codebase + research-expert

# 2. Create files
touch plugins/<plugin>/agents/<agent-name>.md
touch plugins/<plugin>/scripts/validate-<stack>-solid.sh
chmod +x plugins/<plugin>/scripts/*.sh

# 3. Register in marketplace.json

# 4. Validate
→ sniper

Adapt Existing Agent

# 1. Copy similar agent
cp plugins/nextjs-expert/agents/nextjs-expert.md plugins/new-plugin/agents/new-expert.md

# 2. Adapt with sed
sed -i '' "s/nextjs/newstack/g; s/Next\.js/NewStack/g" agents/new-expert.md

# 3. Update skills, tools, register

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Validation Checklist

• ALL content in English
• Frontmatter complete (name, description, model, tools, skills)
• Agent Workflow section present
• Mandatory Skills Usage table
• SOLID Rules reference to solid-[stack]
• Local Documentation paths valid
• Output Format section present (status, files_changed, errors, sources)
• Hook scripts executable
• Registered in marketplace.json

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Related: Skill Creator

When creating an agent, you often need to create skills too.

Use /fuse-ai-pilot:skill-creator to create skills for the agent:

Scenario	Action
New agent needs skills	Create skills with skill-creator first
Agent references skills	Ensure skills exist in skills/
Adapting agent	Adapt related skills too

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Best Practices

DO

• Use skill-creator for associated skills
• Reference solid-[stack] skill for SOLID rules
• Include Gemini Design section for UI agents
• Make hook scripts executable

DON'T

• Write in French (English only)
• Skip Agent Workflow section
• Forget marketplace registration
• Create agent without its skills
• Hard-code paths in hooks (use $CLAUDE_PLUGIN_ROOT)