chore: clean up and modernize repo after example migration

.env.example

@@ -3,35 +3,16 @@ POSTHOG_API_KEY=your_posthog_api_key_here
 POSTHOG_HOST=https://app.posthog.com  # or http://localhost:8010 for local development
 POSTHOG_DISTINCT_ID=example-user
 
-# PostHog Package Configuration
-# Choose one of the following options:
-
-# Option 1: Use published packages (default - recommended for most users)
-# Leave these commented out to use the default versions from package.json/requirements.txt
-
-# Option 2: Use specific package versions from npm/PyPI
-# POSTHOG_PYTHON_VERSION=6.6.1
-# POSTHOG_JS_AI_VERSION=6.1.2
-# POSTHOG_JS_NODE_VERSION=5.7.0
-
-# Option 3: Use local development paths (for PostHog SDK developers)
-# Uncomment and adjust paths to your local PostHog repositories:
-# POSTHOG_PYTHON_PATH=../../posthog-python
-# POSTHOG_JS_PATH=../../posthog-js
-
-# LiteLLM Local Development
-# LITELLM_PATH=../../litellm
-
 # AI Provider API Keys
 ANTHROPIC_API_KEY=your_anthropic_api_key_here
 GEMINI_API_KEY=your_gemini_api_key_here
 OPENAI_API_KEY=your_openai_api_key_here
-AI_GATEWAY_API_KEY=your_vercel_ai_gateway_api_key_here
+
+# Local SDK Development (optional)
+# Uncomment and adjust paths to your local PostHog repositories:
+# POSTHOG_PYTHON_PATH=../posthog-python
+# POSTHOG_JS_PATH=../posthog-js
 
 # Debug Mode (optional)
 # Set to 1 to enable detailed API call logging
-# DEBUG=1
-
-# AI Session ID (optional)
-# Set to True to enable session ID tracking for grouping related traces
-ENABLE_AI_SESSION_ID=True
+# DEBUG=1

.gitignore

@@ -1,23 +1,12 @@
-# Dependencies
-node_modules/
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
-venv
-
-# Build outputs
-dist/
-build/
-*.tsbuildinfo
-
+# Python
+.venv/
+venv/
+__pycache__/
 *.pyc
 
 # Environment variables
 .env
 .env.local
-.env.development.local
-.env.test.local
-.env.production.local
 
 # IDE files
 .vscode/
@@ -27,42 +16,12 @@ build/
 
 # OS generated files
 .DS_Store
-.DS_Store?
-._*
-.Spotlight-V100
-.Trashes
-ehthumbs.db
-Thumbs.db
 
 # Logs
-logs
 *.log
 
-# Runtime data
-pids
-*.pid
-*.seed
-*.pid.lock
-
-# Coverage directory used by tools like istanbul
-coverage/
-
-# nyc test coverage
-.nyc_output
-
-# Dependency directories
-jspm_packages/
-
-# Optional npm cache directory
-.npm
-
-# Optional REPL history
-.node_repl_history
-
-# Output of 'npm pack'
-*.tgz
-
-# Yarn Integrity file
-.yarn-integrity
+# Misc
+example.json
 
-example.json
+# Node.js
+node_modules/