AI Agent Setup Kit (OpenAI Codex + Anthropic Claude Code + Google Antigravity)

This repository helps you set up a practical AI coding workspace with:

• reusable skills
• repeatable workflows
• safety rules
• MCP server integrations
• local archive tools for project memory and search

This guide is written for non-technical and low-technical users. Copy and paste the commands exactly as shown.

What You Get

• OpenAI catalog under Agent/OpenAI/
• Anthropic catalog under Agent/Anthropic/
• Google catalog under Agent/Google/
• MCP catalog under MCP-Servers/mcp-docker-stack/docker-mcp-catalog.yaml
• Local helper scripts under vendor-specific Scripts/ folders (root scripts are deprecated)
• Local archive storage under Agent-Context/ (kept local, not versioned)

Before You Start

Install these first:

1. Git
2. Docker Desktop (with Docker MCP support available)
3. PowerShell (Windows 10/11 is fine)
4. Your AI client:

• OpenAI Codex and/or ChatGPT desktop app
• Anthropic Claude Code and/or Claude Desktop
• Google Antigravity

One-Time Repo Setup

From a terminal:

git clone https://github.com/TheThirdRail/coding-agent-setup.git
cd coding-agent-setup
Copy-Item example.env .env

Open .env and fill in keys you actually use. Start with:

• GITHUB_PERSONAL_ACCESS_TOKEN
• BRAVE_API_KEY

Use secrets-acquisition-guide.md if you need help getting keys.

Setup Path A: OpenAI Codex

Use this path if you want Codex-style skills, rules, and automations.

Install OpenAI Artifacts

cd Agent\OpenAI\Scripts
.\validate-codex-openai.ps1
.\install-rules.ps1 -DryRun
.\install-rules.ps1

What this installs:

• ~/.codex/AGENTS.md
• ~/.codex/rules/default.rules
• ~/.codex/skills/*
• ~/.codex/automations/*.automation.md

Optional mirror to ~/.agents/* too:

.\install-rules.ps1 -Target both

Configure MCP for OpenAI Clients

..\..\..\MCP-Servers\scripts\install-mcp-servers.ps1 -Vendor openai -ServerNames "filesystem", "github", "desktop-commander", "context7"
..\..\..\MCP-Servers\scripts\set-mcp-secrets.ps1
..\..\..\MCP-Servers\scripts\setup_lazy_load.ps1 -ClientName "OpenAI ChatGPT/Codex"

Then restart Codex/ChatGPT so it reloads config.

Setup Path B: Google Antigravity

Use this path if you want slash-command workflows in Antigravity.

Install Google Artifacts

cd Agent\Google\Scripts
.\deprecation-checker.ps1 -DryRun
.\deprecation-checker.ps1
.\install-rules.ps1
.\install-skills.ps1
.\install-workflows.ps1

What this installs:

• ~/.gemini/GEMINI.md
• ~/.gemini/antigravity/skills/*
• ~/.gemini/antigravity/global_workflows/*.md

Configure MCP for Google

..\..\..\MCP-Servers\scripts\install-mcp-servers.ps1 -Vendor google -ServerNames "filesystem", "github", "desktop-commander", "context7"
..\..\..\MCP-Servers\scripts\set-mcp-secrets.ps1
..\..\..\MCP-Servers\scripts\setup_lazy_load.ps1 -ClientName "Google Antigravity"

Then restart Antigravity.

Setup Path C: Anthropic Claude Code

Use this path if you want Anthropic subagents with canonical CLAUDE.md policy routing.

Install Anthropic Artifacts

cd Agent\Anthropic\Scripts
.\validate-rule-length.ps1
.\validate-subagents.ps1
.\deprecation-checker.ps1 -DryRun
.\install-rules.ps1
.\install-skills.ps1
.\install-subagents.ps1
.\install-settings.ps1

What this installs:

• ~/.claude/CLAUDE.md
• ~/.claude/rules/*.md
• ~/.claude/skills/*
• ~/.claude/agents/*.md
• ~/.claude/settings.json (merged baseline)

Configure MCP for Anthropic

..\..\..\MCP-Servers\scripts\install-mcp-servers.ps1 -Vendor anthropic -ServerNames "filesystem", "github", "desktop-commander", "context7"
..\..\..\MCP-Servers\scripts\set-mcp-secrets.ps1
..\..\..\MCP-Servers\scripts\setup_lazy_load.ps1 -ClientName "Anthropic Claude Code"

Then restart Claude Code/Claude Desktop.

MCP Catalog Overview

The project catalog currently defines 46 MCP servers in categories like:

• development and command execution
• search and research
• security scanning
• data and vector databases
• frontend and utility tools

Main file:

• MCP-Servers/mcp-docker-stack/docker-mcp-catalog.yaml

Local Archives (Project Memory)

This repo includes archive skills that use local data stores:

• semantic docs archive (Chroma)
• code structure graph (SQLite)
• durable memory notes (SQLite)
• git-history and code search helpers

Local archive path:

• Agent-Context/Archives/

Important:

• Agent-Context/ is local-only and ignored by Git
• do not store secrets in archive data

Folder Map

.
├── Agent/
│   ├── OpenAI/
│   │   ├── AGENTS.md
│   │   ├── default.rules
│   │   ├── Automations/
│   │   ├── Skills/
│   │   └── Scripts/
│   ├── Anthropic/
│   │   ├── Rules/
│   │   ├── Skills/
│   │   ├── Subagents/
│   │   └── Scripts/
│   └── Google/
│       ├── Rules/
│       ├── Skills/
│       ├── Workflows/
│       └── Scripts/
├── MCP-Servers/
│   ├── mcp-docker-stack/
│   └── scripts/
├── deprecated-Scripts/
├── Agent-Context/
├── example.env
├── secrets-acquisition-guide.md
└── README.md

Which File Should I Read Next?

If you use OpenAI Codex:

• Agent/OpenAI/AGENTS.md
• Agent/OpenAI/Scripts/script-commands.md
• codex-sample-workflow.md

If you use Google Antigravity:

• Agent/Google/Rules/GEMINI.md
• Agent/Google/Scripts/script-commands.md
• antigravity-sample-workflow.md

If you use Anthropic Claude Code:

• Agent/Anthropic/Rules/CLAUDE.md
• Agent/Anthropic/Scripts/script-commands.md
• claude-code-sample-workflow.md

Common Problems

Script says it cannot run

Use:

Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser

MCP command fails

• make sure Docker Desktop is running
• make sure your .env file exists and has needed keys
• rerun MCP-Servers/scripts/set-mcp-secrets.ps1

Changes do not appear in the AI client

• restart the client after install scripts run

Safe Daily Update Routine

OpenAI:

cd Agent\OpenAI\Scripts
.\install-rules.ps1

Google:

cd Agent\Google\Scripts
.\install-rules.ps1
.\install-skills.ps1
.\install-workflows.ps1

Anthropic:

cd Agent\Anthropic\Scripts
.\install-rules.ps1
.\install-skills.ps1
.\install-subagents.ps1
.\install-settings.ps1

License

MIT