google/adk-python v1.26.0

on GitHub

1.26.0 (2026-02-26)

Features

• [Core]

  • Add intra-invocation compaction and token compaction pre-request (485fcb8)
  • Use --memory_service_uri in ADK CLI run command (a7b5097)

• [Models]

  • Add /chat/completions integration to ApigeeLlm (9c4c445)
  • Add /chat/completions streaming support to Apigee LLM (121d277)
  • Expand LiteLlm supported models and add registry tests (d5332f4)

• [Tools]

  • Add load_skill_from_dir() method (9f7d5b3)
  • Agent Skills spec compliance — validation, aliases, scripts, and auto-injection (223d9a7)
  • BigQuery ADK support for search catalog tool (bef3f11)
  • Make skill instruction optimizable and can adapt to user tasks (21be6ad)
  • Pass trace context in MCP tool call's _meta field with OpenTelemetry propagator (bcbfeba)

• [Evals]

  • Introduce User Personas to the ADK evaluation framework (6a808c6)

• [Services]

  • Add generate/create modes for Vertex AI Memory Bank writes (811e50a)
  • Add support for memory consolidation via Vertex AI Memory Bank (4a88804)

• [A2A]

  • Add interceptor framework to A2aAgentExecutor (87fcd77)

• [Auth]

  • Add native support for id_token in OAuth2 credentials (33f7d11)
  • Support ID token exchange in ServiceAccountCredentialExchanger (7be90db), closes #4458

• [Integrations]

  • Agent Registry in ADK (abaa929)
  • Add schema auto-upgrade, tool provenance, HITL tracing, and span hierarchy fix to BigQuery Agent Analytics plugin (4260ef0)
  • Change default BigQuery table ID and update docstring (7557a92)
  • Update Agent Registry to create AgentCard from info in get agents endpoint (c33d614)

• [Web]

  • Enable dependency injection for agent loader in FastAPI app gen (34da2d5)

Bug Fixes

• Add OpenAI strict JSON schema enforcement in LiteLLM (2dbd1f2), closes #4573
• Add push notification config store to agent_to_a2a (4ca904f), closes #4126
• Add support for injecting a custom google.genai.Client into Gemini models (48105b4), closes #2560
• Add support for injecting a custom google.genai.Client into Gemini models (c615757), closes #2560
• Check both input_stream parameter name and its annotation to decide whether it's a streaming tool that accept input stream (d56cb41)
• deps: Increase pydantic lower version to 2.7.0 (dbd6420)
• edit copybara and BUILD config for new adk/integrations folder (added with Agent Registry) (37d52b4)
• Expand add_memory to accept MemoryEntry (f27a9cf)
• Fix pickling lock errors in McpSessionManager (4e2d615)
• fix typo in PlanReActPlanner instruction (6d53d80)
• handle UnicodeDecodeError when loading skills in ADK (3fbc27f)
• Improve BigQuery Agent Analytics plugin reliability and code quality (ea03487)
• Include list of skills in every message and remove list_skills tool from system instruction (4285f85)
• Invoke on_tool_error_callback for missing tools in live mode (e6b601a)
• Keep query params embedded in OpenAPI paths when using httpx (ffbcc0a), closes #4555
• Only relay the LiveRequest after tools is invoked (b53bc55)
• Parallelize tool resolution in LlmAgent.canonical_tools() (7478bda)
• race condition in table creation for DatabaseSessionService (fbe9ecc)
• Re-export DEFAULT_SKILL_SYSTEM_INSTRUCTION to skills and skill/prompt.py to avoid breaking current users (40ec134)
• Refactor LiteLLM streaming response parsing for compatibility with LiteLLM 1.81+ (e8019b1), closes #4225
• remove duplicate session GET when using API server, unbreak auto_session_create when using API server (445dc18)
• Remove experimental decorators from user persona data models (eccdf6d)
• Replace the global DEFAULT_USER_PERSONA_REGISTRY with a function call to get_default_persona_registry (2703613)
• skill: coloate default skill SI with skilltoolset (fc1f1db)
• Update agent_engine_sandbox_code_executor in ADK (ee8d956)
• Update agent_engine_sandbox_code_executor in ADK (dab80e4)
• Update sample skills agent to use weather-skill instead of weather_skill (8f54281)
• update Spanner query tools to async functions (1dbcecc)
• use correct msg_out/msg_err keys for Agent Engine sandbox output (b1e33a9)
• Validate session before streaming instead of eagerly advancing the runner generator (ab32f33)
• web: allow session resume without new message (30b2ed3)

Code Refactoring

• Extract reusable function for building agent transfer instructions (e1e0d63)
• Extract reusable private methods (976a238)
• Extract reusable private methods (42eeaef)
• Extract reusable private methods (706f9fe)

Documentation

• add thinking_config in generate_content_config in example agent (c6b1c74)