v1.15.0

[xuanyang15]

1.15.0 (2025-09-24)

Features

• [Core]
  • Adding the ContextFilterPlugin (a06bf27)
  • Adds plugin to save artifacts for issue #2176 (657369c)
  • Expose log probs of candidates in LlmResponse (f7bd3c1)
• [Context Caching]
  • Support context caching (c66245a)

    • Support explicit context caching auto creation and lifecycle management.

      Usage: App(root_agent=..., plugins=..., context_cache_config=...)

  • Support non-text content in static instruction (61213ce)
  • Support static instructions (9be9cc2)

    • Support static instruction that won't change, put at the beginning of
      the instruction.
      Static instruction support inline_data and file_data as contents.
      Dynamic instruction moved to the end of LlmRequest, increasing prefix
      caching matching size.

      Usage:
      LlmAgent(model=...,static_instruction =types.Content(parts=...), ... )

• [Telemetry]
  • Add --otel_to_cloud experimental support (1ae0b82, b131268, 7870480)
  • Add GenAI Instrumentation if --otel_to_cloud is enabled (cee365a)
  • Support standard OTel env variables for exporter endpoints (f157b2e)
  • Temporarily disable Cloud Monitoring integration in --otel_to_cloud (3b80337)
• [Services]
  • Add endpoint to generate memory from session (2595824)
• [Tools]
  • Add Google Maps Grounding Tool to ADK (6b49391)
  • MCP: Initialize tool_name_prefix in MCPToolse (86dea5b)
• [Evals]
  • Data model for storing App Details and data model for steps (01923a9)
  • Adds Rubric based final response evaluator (5a485b0)
  • Populate AppDetails to each Invocation (d486795)
• [Samples]
  • Make the bigquery sample agent run with ADC out-of-the-box (10cf377)

Bug Fixes

• Close runners after running eval (86ee6e3)
• Filter out thought parts when saving agent output to state (632bf8b)
• Ignore empty function chunk in LiteLlm streaming response (8a92fd1)
• Introduces a raw_mcp_tool method in McpTool to provide direct access to the underlying MCP tool (6158075)
• Make a copy of the columns instead of modifying it in place (aef1ee9)
• Prevent escaping of Latin characters in LLM response (c9ea80a)
• Retain the consumers and transport registry when recreating the ClientFactory in remote_a2a_agent.py (6bd33e1)
• Remove unsupported 'type': 'unknown' in test_common.py for fastapi 0.117.1 (3745221)

Documentation

• Correct the documentation of after_agent_callback (b9735b2)

---

This discussion is created for the release v.1.15.0.

[mattmcc-attest]

In Evals how do we use:

Adds Rubric based final response evaluator ([5a485b0](https://github.com/google/adk-python/commit/5a485b01cd64cb49735e13ebd5e7fa3da02cd85f))

Will there be anything in the docs? @xuanyang15

[xuanyang15]

@ankursharmas Could you please help with this?