- Fix type mappings in OpenAIRequest and BackendConfig to handle structured message parts (cache-control). - Stop adaptRequest crashing when message contents are objects or arrays. - Forward stream, top_k, and stop_sequences to adaptRequest. - Forward anthropic-version header to backend endpoints during adaptation. - Parse structured JSON error payloads from upstream before returning generic "Upstream rejected request" error. - Create .github/workflows/cloudflare.yml to auto-deploy on master branch pushes. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>