Goose 1.55.0

✨ Features

• AIgateway declarative provider #12528
• Propagate W3C trace context from ACP prompts to MCP tool calls #12697
• Surface provider x-request-id on responses and errors #12587
• Honor supports_vision declared on custom provider models #12769
• Use live model metadata for OpenAI reasoning and prefer the Responses API #12568
• Cap auto-compaction at 225k tokens by default #12790
• Improve askai bot relevance #12728

🐛 Bug Fixes

• Adaptive thinking for Claude Sonnet and Haiku 5.5 #12761
• Reject malformed GOOSE_MODE across ACP providers #12846
• Bedrock: don't retry non-context ValidationException on converse_stream #12710
• OpenRouter: do not set transforms field unconditionally #11374
• Apply long-context price tiers to cost estimates #12787
• Finish pending tools before enforcing max turns #12702
• Not offer delegate to code-mode scripts #12711
• Anthropic: forward unknown request_params to wire, mirroring openai engine #12720
• Desktop: show copy button on messages with thinking blocks #12726

🔧 Improvements

• Bind subagents by their parent's hooks, mode and approvals #12802
• Lease a session's selection and start each extension on first use #12775
• Make Stop end the run promptly and save what it produced #12765
• Make tool operations own tool call checks #12865
• Not infer or steer while a tool approval is pending #12808
• Leave the login-shell PATH to whoever launches goose #12799
• Build turns from the session record: derive recipe prompt parts, persist prompt, goal and container #12730
• Add ProviderManager and route session providers through it #12745
• Use typed structs for openai message formatting #12725
• Remove background subagents and orchestrator; make Doctor session-only #12729
• Avoid duplicate provider initialization for foreground subagents #12705
• Refresh the model catalog on the blocking pool #12727
• Remove false optionality in desktop props #12776
• Delete the legacy agent loop #12760

📚 Documentation

• Agentic State Machines #12130