LLM Skill Marketplace

Go + Postgres marketplace where authenticated users can upload LLM skill files, sell them, and buyers can unlock and copy/download purchased skills.

Stack

• Backend: Go (go run .)
• Frontend: vanilla HTML/CSS/JS
• Database: Postgres
• Auth: Authentik forward auth (identity headers)
• Config: environment variables with .env support

Run

1. Copy .env.example to .env and set values.
2. Start Postgres and create the target database.
3. Install dependencies:

   go mod tidy
   

4. Start server:

   go run .
   

5. Open http://localhost:8080.

Listener configuration

• LISTEN_NETWORK: tcp (default) or unix
• LISTEN_ADDRESS:
  • for tcp: address like :8080 or 127.0.0.1:8080
  • for unix: socket path like /tmp/skills2.sock
• UNIX_SOCKET_PERM: octal file mode for unix socket path (default 0660)

Examples:

• TCP (default):
  • LISTEN_NETWORK=tcp
  • LISTEN_ADDRESS=:8080
• Unix socket:
  • LISTEN_NETWORK=unix
  • LISTEN_ADDRESS=/tmp/skills2.sock
  • UNIX_SOCKET_PERM=0660

Local dev mode (no auth setup)

Set DEV_MODE=true in .env. In this mode, protected routes always authenticate as:

• sub: demo-user-001
• email: demo@example.com
• name: Demo User

Forward auth flow (production)

When DEV_MODE=false, deploy this app behind Authentik forward auth. The proxy/auth layer must validate authentication and pass identity headers to the app. The app reads:

• X-Authentik-Uid (required; fallback X-Forwarded-User)
• X-Authentik-Email
• X-Authentik-Name (fallback X-Forwarded-Preferred-Username)

Key routes

• GET /dashboard: upload form
• GET /skills: browse listings and buy
• GET /my-skills: purchased skills and copy/download access
• POST /api/upload: upload and list a skill
• POST /api/purchase: buy a skill
• GET /api/my-skills: owned purchased list
• GET /uploads/:id: download unlocked skill file