v1.9.0 released

[hangfei]

Details: https://github.com/google/adk-python/releases/tag/v1.9.0

[NeshaLe]

When using retry_options from v1.9.0 with a Gemini instance, the terminal always reports that Gemini 1.5 Flash is being used, regardless of the model specified. I tried both gemini-2.5-pro and gemini-2.0-flash, but the terminal still shows gemini-1.5-flash. Am I doing something wrong?

code block example:

from google.adk.models import Gemini

if GEMINI_AVAILABLE:
   synthesizer_model = Gemini(
       model_name="gemini-2.5-pro",
       retry_options=types.HttpRetryOptions(
           initial_delay=2, 
           attempts=3   
       )
   )
else:
   synthesizer_model = "gemini-2.5-pro"

final_synthesizer_agent = LlmAgent(
   model=synthesizer_model,
   name="final_synthesizer_agent", ...

[soundTricker]

@hangfei why is tag format changed?
prev: v1.8.0
new: v.1.9.0 (insert dot after v)

[DeanChensj]

Hi, this has been fixed.

[adk-bot]

Response from ADK Answering Agent

TLDR: The change in the git tag format to v.1.9.0 appears to be a typo. The project's official policy is to adhere to Semantic Versioning 2.0.0 (MAJOR.MINOR.PATCH).

---

Hello! That's a great question.

Based on the project's documentation, the adk-python project adheres to the Semantic Versioning 2.0.0 specification, where release versions follow the MAJOR.MINOR.PATCH format. [1] The v prefix is a common convention, but the additional dot in v.1.9.0 is inconsistent with previous tags (e.g., v1.8.0) and the standard format.

Looking at the CHANGELOG.md, the versions are listed without the v. prefix (e.g., 1.2.0). [2] This suggests that the format of the v.1.9.0 tag is likely an unintentional typo.

---

[1] https://github.com/google/adk-python/blob/main/AGENTS.md
[2] https://github.com/google/adk-python/blob/main/CHANGELOG.md