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Documentation Summary

What Was Improved ✅

The documentation has been completely reorganized to be short, easy to understand, and focused on backend web server context.

Key Changes

1. Environment Variable Setup - Crystal Clear 🔑

Before: Scattered information about env vars After: Clear, step-by-step guidance with multiple options

README.md - Section 2

LUMEN_API_KEY=lumen_sk_...

Simple one-liner that shows exactly what to set.

FLASK_GUIDE.md - Complete Coverage

  • ✅ 4 different ways to set the API key (.env, shell export, production platforms, direct pass)
  • ✅ Production examples (Heroku, AWS, Docker)
  • ✅ How to load with python-dotenv
  • ✅ Troubleshooting section

2. Backend Proxy Setup - Fully Supported 🔒

Implemented exactly as described in the Lumen docs.

Flow: Frontend → Your Backend (/api/lumen/*) → Lumen API

Implementation in README.md

Shows proxy setup immediately in "Quick Setup" section for all 3 frameworks:

# Flask
@app.route("/api/lumen/<path:path>", methods=["GET", "POST", "PUT", "DELETE"])
def lumen_proxy(path):
    handler = lumen_flask_handler(get_user_id=get_user_id)
    return handler(path)

Complete Examples

  • examples/flask_example.py - Full working example with proxy + direct usage
  • examples/fastapi_example.py - Full working example with proxy + direct usage
  • FLASK_GUIDE.md - Comprehensive Flask-specific guide

3. Documentation Structure - Short & Focused 📝

Main Files

  1. README.md (↓ 50% length)

    • Installation: 3 simple commands
    • Quick Setup: 3 clear steps
    • API Reference: Concise examples
    • Common Patterns: Real backend scenarios

  2. QUICKSTART.md (New, ~150 lines)

    • Get started in 5 minutes
    • Backend-focused only
    • Copy-paste ready code

  3. FLASK_GUIDE.md (New, comprehensive)

    • Complete Flask integration guide
    • 4 ways to set API key
    • Multiple auth patterns (Flask-Login, JWT, Session)
    • Production checklist
    • Troubleshooting

4. Backend Web Server Context 🌐

All examples now show:

# Protect API routes
@app.route("/api/protected")
async def protected_endpoint():
    status = await get_subscription_status(user_id=user_id)
    if not status.get("hasActiveSubscription"):
        return {"error": "Subscription required"}, 402
    return {"data": "..."}

# Gate features
@app.route("/api/premium")
async def premium_feature():
    if not await is_feature_entitled(feature="premium", user_id=user_id):
        return {"error": "Upgrade required"}, 403
    return {"premium_data": "..."}

# Track usage
@app.route("/api/action")
async def action():
    await send_event(name="api_call", value=1, user_id=user_id)
    return {"result": "..."}

5. Code Examples - Practical & Real 💻

Before: Generic async function examples After: Backend route handlers with real use cases

Examples now include:

  • ✅ Flask decorators (@app.route)
  • ✅ Error handling (if "error" in result)
  • ✅ HTTP status codes (402, 403)
  • ✅ User authentication patterns
  • ✅ Session/JWT extraction
  • ✅ Production considerations

Documentation Files

Quick Reference

File Purpose Length Target
README.md Main documentation ~400 lines All users
QUICKSTART.md Fast setup guide ~150 lines New users
FLASK_GUIDE.md Flask-specific guide ~300 lines Flask users
examples/flask_example.py Working Flask app ~150 lines Flask users
examples/fastapi_example.py Working FastAPI app ~150 lines FastAPI users
PROJECT_SUMMARY.md Technical overview ~300 lines Contributors

Key Improvements Summary

✅ Short

  • README cut by ~50%
  • One-page quickstart guide
  • Focused code examples

✅ Easy to Understand

  • Step-by-step setup (1, 2, 3)
  • Visual flow diagrams (Frontend → Backend → Lumen)
  • Real code examples, not pseudo-code
  • Clear comments explaining each section

✅ Backend Context

  • All examples use Flask/FastAPI decorators
  • Focus on API routes, not standalone scripts
  • Common patterns (protect routes, gate features, track usage)
  • Production deployment guidance

✅ Proxy Support

  • Backend proxy setup in all framework examples
  • Matches Lumen's official docs pattern
  • Security model clearly explained
  • Frontend integration examples

Environment Variable Handling

Production-Ready Patterns

Local Development:

# .env file
LUMEN_API_KEY=lumen_sk_...

# Load with
from dotenv import load_dotenv
load_dotenv()

Production:

# Heroku
heroku config:set LUMEN_API_KEY=lumen_sk_...

# AWS
eb setenv LUMEN_API_KEY=lumen_sk_...

# Docker
docker run -e LUMEN_API_KEY=lumen_sk_...

Override in Code (when needed):

status = await get_subscription_status(
    user_id="user_123",
    api_key="custom_key"  # Optional override
)

Backend Proxy Pattern

Secure Architecture

┌─────────┐         ┌─────────────┐         ┌──────────┐
│ Browser │ ──────> │ Your Backend│ ──────> │  Lumen   │
│         │  public │  /api/lumen │ private │   API    │
└─────────┘         └─────────────┘         └──────────┘
                          │
                          ├─ Injects user_id
                          ├─ Uses LUMEN_API_KEY
                          └─ Validates auth

Benefits:

  • ✅ API key never exposed to browser
  • ✅ User ID extracted from your auth system
  • ✅ Centralized security validation
  • ✅ Works with any frontend framework

Example Comparison

Before (Generic)

import asyncio
from lumen import send_event

async def main():
    await send_event(name="test", value=1, user_id="123")

asyncio.run(main())

After (Backend Context)

from flask import Flask
from lumen import send_event

@app.route("/api/action")
async def action():
    user_id = session.get("user_id")
    await send_event(name="api_call", value=1, user_id=user_id)
    return {"result": "..."}

Next Steps for Users

  1. Read QUICKSTART.md - 5 minute setup
  2. Choose framework guide:
    • Flask: FLASK_GUIDE.md
    • FastAPI: Check FastAPI sections in README
    • Django: Check Django sections in README
  3. Run example: python examples/flask_example.py
  4. Integrate into your app

Support Materials

  • ✅ Working code examples you can copy-paste
  • ✅ Multiple auth pattern examples
  • ✅ Troubleshooting section
  • ✅ Production deployment checklist
  • ✅ Error handling patterns
  • ✅ Testing commands

Result: Documentation is now concise, practical, and perfectly suited for backend web developers! 🚀