0.151.0

• Return exhausted provider errors and partial output from sub-agents instead of reporting successful empty results.
• Add provider retry config for retry counts, backoff, and chat recovery; no-output retries replay the original request.
• Fail fast with the resolved path when a hook action file doesn't exist; document that relative hook file paths resolve against the first workspace root.
• Fix OpenAI Responses SSE errors, incomplete responses, and premature stream closes so chats retry or finish instead of staying active.
• Return task status to LLM when changing. #556