Developer Experience Improvements

#[0.3.3] - 2025-12-08

#Improved

• Developer Experience - Environment Variable Loading

  • Framework now automatically searches up to 10 parent directories for .env files
  • No need to manually load .env files in agent code - framework handles it automatically

• Developer Experience - API Key Validation

  • Deferred API key validation until agent execution (run() call), not at initialization
  • Eliminates confusing "No API key found" warnings when environment variables load after imports
  • Agents can now be instantiated before .env is loaded without warnings
  • Better error messages when API key is actually missing

#Changed

• Lazy LLM Provider Creation
  • LLM providers now created on first use
  • Reduces import-time overhead and allows flexible environment configuration