StackForge by Codex Skiller — AI Project Blueprint Generator
Works with OpenCode · Claude Code · Codex · Cursor · ChatGPT · Windsurf · Gemini CLI
StackForge is an AI agent skill (SKILL.md) that transforms software ideas into production-ready project blueprints. Works with any AI coding assistant that supports SKILL.md or custom instructions.
When you say "I want to build X", it generates a complete blueprint with:
- Tech Stack — curated choices with justifications and alternatives
- Folder Structure — copy-paste ready directory tree
- Database Design — column-level schema, indexes, relationships
- System Architecture — ASCII diagrams, data flow, auth flow
- Development Roadmap — phased timeline with milestones
- Deployment Guide — platform-specific commands
- Testing Strategy — unit, integration, E2E with CI integration
- Security & Monitoring — auth, rate limiting, error tracking
- Cost Breakdown — monthly hosting estimates with free tier limits
- Risk Mitigation — top risks with prevention strategies
# Global install (all projects)
mkdir -p ~/.config/opencode/skills
git clone https://github.com/codexskills/skill-builder.git
cp -r skill-builder ~/.config/opencode/skills/stackforge
# Or project-level install
cp -r skill-builder .opencode/skills/stackforgeRestart OpenCode. The skill loads automatically when you say "build me X" or "design my project".
# Global install (all projects)
mkdir -p ~/.claude/skills
git clone https://github.com/codexskills/skill-builder.git
cp -r skill-builder ~/.claude/skills/stackforge
# Or project-level install
cp -r skill-builder .claude/skills/stackforgeRestart Claude Code. Say "I want to build a Telegram bot" to trigger StackForge.
# Install to Codex skills directory
mkdir -p ~/.codex/skills
git clone https://github.com/codexskills/skill-builder.git
cp -r skill-builder ~/.codex/skills/stackforgeOr add to your project:
cp -r skill-builder .agents/skills/stackforgeStackForge auto-detects when you describe a project idea.
# Install as Cursor rule
mkdir -p .cursor/rules
cp skill-builder/SKILL.md .cursor/rules/stackforge.mdcOr add to Cursor's rules directory:
mkdir -p ~/.cursor/rules
cp skill-builder/SKILL.md ~/.cursor/rules/stackforge.mdc- Open ChatGPT
- Go to Explore GPTs → Create a GPT (or Projects → Add instructions)
- In the Instructions field, paste the entire content of
SKILL.md - Save as "StackForge" or "Project Blueprint Generator"
Now when you describe a project idea, ChatGPT will generate blueprints using StackForge's framework.
# Add to Windsurf rules
cp skill-builder/SKILL.md .windsurfrules# Install to Gemini CLI skills
mkdir -p ~/.gemini/skills
git clone https://github.com/codexskills/skill-builder.git
cp -r skill-builder ~/.gemini/skills/stackforge- Open claude.ai
- Create a new Project
- Go to Project Settings → Knowledge
- Upload or paste the content of
SKILL.md - Also paste the relevant reference files from
references/folder
Most AI agents support one of these methods:
- SKILL.md folder: Copy
skill-builder/folder to~/.config/opencode/skills/stackforge/or the agent's equivalent skills directory - Custom instructions: Paste the content of
SKILL.mdinto the agent's system prompt or instructions field - Project knowledge: Upload
SKILL.mdand reference files as project knowledge documents
git clone https://github.com/codexskills/skill-builder.git
cd skill-builder
# Install to all supported platforms at once
cp -r . ~/.config/opencode/skills/stackforge 2>/dev/null
cp -r . ~/.claude/skills/stackforge 2>/dev/null
cp -r . ~/.codex/skills/stackforge 2>/dev/null
cp -r . ~/.gemini/skills/stackforge 2>/dev/null
cp SKILL.md ~/.cursor/rules/stackforge.mdc 2>/dev/null
cp SKILL.md .windsurfrules 2>/dev/null
echo "StackForge installed!"StackForge activates when you say any of these to your AI agent:
| Say This | What Happens |
|---|---|
| "I want to build X" | Full project blueprint |
| "Build me a Telegram bot" | Bot-specific blueprint |
| "Design a SaaS dashboard" | Web app blueprint |
| "What stack should I use for X" | Stack recommendation |
| "Plan my project X" | Requirements + roadmap |
| "Architect an AI chatbot" | AI system architecture |
| "Help me create a mobile app" | Mobile app blueprint |
You: "Build a Telegram bot for restaurant food ordering"
StackForge outputs:
- Stack: Python 3.12 + python-telegram-bot + PostgreSQL + Redis
- Database: 7 tables with indexes and foreign keys
- Architecture: Webhook → Queue → Processor → Payment
- Roadmap: 6 phases over 6 weeks
- Cost: $5-15/month on Railway free tier
| Type | Examples |
|---|---|
| Web Application | SaaS, dashboard, e-commerce, landing page |
| Bot | Telegram, Discord, Slack bots, automation |
| API / Backend | REST, GraphQL, microservices |
| Mobile App | React Native, Flutter, SwiftUI |
| AI System | RAG, LLM chatbot, AI agent, ML pipeline |
| CLI Tool | Command-line apps, dev tools, scripts |
| Static Site | Blog, docs, portfolio |
| Browser Extension | Chrome, Firefox, Edge addons |
| Desktop App | Tauri, Electron, native |
skill-builder/
├── SKILL.md # Main skill file (agent instructions)
├── README.md # This file
├── install.sh # One-line installer
├── tests/
│ └── TESTING.md # Test prompts for all 9 project types
├── references/ # Stack references by type
│ ├── webapp.md
│ ├── bot.md
│ ├── api.md
│ ├── mobile.md
│ ├── ai.md
│ └── cli.md
├── examples/ # Full blueprint examples
│ ├── telegram-bot.md
│ └── saas-platform.md
└── templates/
└── blueprint.md # Blueprint template
- 9 project types supported
- Smarter input handling (POC, migration, existing stack)
- Critical validation checks (security, auth, monitoring)
- Testing strategy, cost breakdown, risk matrix
- Guided conversation flow
- Cost-aware recommendations with free tier limits
- Collaboration triggers (delegation to other skills)
StackForge Agent Skill — AI project blueprint generator for all coding assistants. Works with OpenCode, Claude Code, Codex, Cursor, ChatGPT, Windsurf, Gemini CLI. Builds: website builder, Telegram bot builder, Discord bot builder, AI agent builder, chatbot builder, RAG pipeline builder, API builder, backend builder, mobile app builder, CLI tool builder, SaaS builder, e-commerce builder, project planner, software architect, system architect, tech stack selector, database designer, deployment planner, MVP builder, full-stack planner, startup builder, indie hacker tool.
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Built by Codex Skiller
codexskills.github.io