Fix: read API_KEY env var (judge's LiteLLM proxy key) with OPENAI_API_KEY as fallback

Fix timeout: add LLM/HTTP timeouts, reduce retries, compact prompts (16s total runtime)

Improve environment depth: investigate action, cascading deps, rich observations, harder hard task

Add interactive web UI for playing the environment in browser

Update task headings in README for clarity

Add root endpoint so HF Space URL shows environment info

Initial commit: Feature Flag Cleanup OpenEnv environment