google/adk-python v1.27.0

on GitHub

Features

• [Core]

  • Introduce A2A request interceptors in RemoteA2aAgent (6f772d2)
  • Add UiWidget to EventActions for supporting new experimental UI Widgets feature (530ff06)
  • auth: Add pluggable support for auth integrations using AuthProviderRegistry within CredentialManager (d004074)
  • Support all types.SchemaUnion as output_schema in LLM Agent (63f450e)
  • durable runtime support (07fdd23)
  • runners: pass GetSessionConfig through Runner to session service (eff724a)

• [Models]

  • Add support for PDF documents in Anthropic LLM (4c8ba74)
  • Add streaming support for Anthropic models (5770cd3), closes #3250
  • Enable output schema with tools for LiteLlm models (89df5fc), closes #3969
  • Preserve thought_signature in LiteLLM tool calls (ae565be), closes #4650

• [Web]

  • Updated human in the loop: developers now can respond to long running functions directly in chat
  • Render artifacts when resuming
  • Fix some light mode styles
  • Fix token level streaming not working properly (22799c0)

• [Observability]

  • telemetry: add new gen_ai.agent.version span attribute (ffe97ec)
  • otel: add gen_ai.tool.definitions to experimental semconv (4dd4d5e)
  • otel: add experimental semantic convention and emit gen_ai.client.inference.operation.details event (19718e9)
  • add missing token usage span attributes during model usage (77bf325)
  • capture tool execution error code in OpenTelemetry spans (e0a6c6d)

• [Tools]

  • Warn when accessing DEFAULT_SKILL_SYSTEM_INSTRUCTION (35366f4)
  • add preserve_property_names option to OpenAPIToolset (078b516)
  • Add gcs filesystem support for Skills. It supports skills in text and pdf format, also has some sample agents (6edcb97)
  • Add list_skills_in_dir to skills utils (327b3af)
  • Add support for MCP App UI widgets in MCPTool (86db35c)
  • add Dataplex Catalog search tool to BigQuery ADK (82c2eef)
  • Add RunSkillScriptTool to SkillToolset (636f68f)
  • Add support for ADK tools in SkillToolset (44a5e6b)
  • limit number of user-provided BigQuery job labels and reserve internal prefixes (8c4ff74)
  • Add param support to Bigtable execute_sql (5702a4b)
  • bigtable: add Bigtable cluster metadata tools (34c560e)
  • execute-type param addition in GkeCodeExecutor (9c45166)
  • skill: Add BashTool (8a31612)
  • Add support for toolsets to additional_tools field of SkillToolset (066fcec)

• [Optimization]

  • Add adk optimize command (b18d7a1)
  • Add interface between optimization infra and LocalEvalService (7b7ddda)
  • Add GEPA root agent prompt optimizer (4e3e2cb)

• [Integrations]

  • Enhance BigQuery plugin schema upgrades and error reporting (bcf38fa)
  • Enhance BQ plugin with fork safety, auto views, and trace continuity (80c5a24)
  • Handle Conflict Errors in BigQuery Agent Analytics Plugin (372c76b)
  • Added tracking headers for ADK CLI command to Agent Engine (3117446)

• [A2A]

  • New implementation of A2aAgentExecutor and A2A-ADK conversion (87ffc55)
  • New implementation of RemoteA2aAgent and A2A-ADK conversion (6770e41)

Bug Fixes

• Allow artifact services to accept dictionary representations of types.Part (b004da5), closes #2886
• Decode image data from ComputerUse tool response into image blobs (d7cfd8f)
• Expand LiteLLM reasoning extraction to include 'reasoning' field (9468487), closes #3694
• Filter non-agent directories from list_agents() (3b5937f)
• Fix Type Error by initializing user_content as a Content object (2addf6b)
• Handle length finish reason in LiteLLM responses (4c6096b), closes #4482
• In SaveFilesAsArtifactsPlugin, write the artifact delta to state then event actions so that the plugin works with ADK Web UI's artifacts panel (d6f31be)
• Make invocation_context optional in convert_event_to_a2a_message (8e79a12)
• Optimize row-level locking in append_event (d61846f), closes #4655
• Preserve thought_signature in FunctionCall conversions between GenAI and A2A (f9c104f)
• Prevent splitting of SSE events with artifactDelta for function resume requests (6a929af), closes #4487
• Propagate file names during A2A to/from Genai Part conversion (f324fa2)
• Propagate thought from A2A TextPart metadata to GenAI Part (e59929e)
• Re-export DEFAULT_SKILL_SYSTEM_INSTRUCTION to skills and skill/prompt.py to avoid breaking current users (de4dee8)
• Refactor type string update in Anthropic tool param conversion (ab4b736)
• simulation: handle NoneType generated_content (9d15517)
• Store and retrieve EventCompaction via custom_metadata in Vertex AISessionService (2e434ca), closes #3465
• Support before_tool_callback and after_tool_callback in Live mode (c36a708), closes #4704
• temp-scoped state now visible to subsequent agents in same invocation (2780ae2)
• tools: Handle JSON Schema boolean schemas in Gemini schema conversion (3256a67)
• typo in A2A EXPERIMENTAL warning (eb55eb7)
• Update agent_engine_sandbox_code_executor in ADK (dff4c44)
• update Bigtable query tools to async functions (72f3e7e)
• Update expected UsageMetadataChunk in LiteLLM tests (dd0851a), closes #4680
• update toolbox server and SDK package versions (2e370ea)
• Validate session before streaming instead of eagerly advancing the runner generator (ebbc114)

Code Refactoring

• extract reusable functions from hitl and auth preprocessor (c59afc2)
• Rename base classes and TypeVars in optimization data types (9154ef5)