1.24.0 (2026-02-04)

⚠ BREAKING CHANGES

• Breaking: Make credential manager accept tool_context instead of callback_context (fe82f3c)

Highlights

• [Web]
  • Consolidated Event View: Replaced the Event tab with a more intuitive "click-to-expand" interaction on message rows, enabling faster debugging within the chat context
  • Enhanced Accessibility: Added full support for arrow-key navigation for a more seamless, keyboard-centric experience
  • Rich Developer Tooling: Introduced detailed tooltips for function calls, providing instant visibility into arguments, responses, and state changes
  • A2UI Integration: Integrated the A2UI v0.8 standard catalog to automatically render spec-compliant ADK parts as native UI components directly in the chat

Features

• [Core]

  • Allow passthrough of GOOGLE_CLOUD_LOCATION for Agent Engine deployments (004e15c)
  • Add interface for agent optimizers (4ee125a)
  • Pass event ID as metadata when converted into a message (85434e2)
  • Restructure the bug report template as per the intake process (324796b)

• [Models]

  • Mark Vertex calls made from non-Gemini models (7d58e0d)

• [Evals]

  • Allow Vertex AI Client initialization with API Key (43d6075)
  • Remove overall evaluation status calculation from and add threshold to custom metric function expected signature ()

Bug Fixes

• Ignore session_db_kwargs for SQLite session services (ce07cd8)
• Resolve MutualTLSChannelError by adding pyopenssl dependency (125bc85)
• Add update_timestamp_tz property to StorageSession (666cebe)
• Do not treat Function Calls and Function Responses as invisible when marked as thoughts (853a3b0)
• Add pre-deployment validation for agent module imports (credit to @ppgranger, 2ac468e)
• Fix cases where execution_result_delimiters have None type element (a16e3cc)
• Disable save_input_blobs_as_artifacts deprecation warning message for users not setting it ()

Improvements

• Check will_continue for streaming function calls (2220d88)
• Update ADK web, rework events, and add A2UI capabilities (37e6507)
• Improve error handling for LiteLLM import in gemma_llm.py (574ec43)
• Replace proxy methods with utils implementation (6ff10b2, f82ceb0)
• Replace print statements with logging in ADK evaluation components (dd8cd27)
• Add sample agent that requires OAuth flow during MCP tool listing, and convert MCPToolset to McpToolset in unit tests (2770012, )