fix(py): add more flows to genai sample #4121

MengqinShen · 2026-01-13T23:52:01Z

This Pr is to add extra flows in google-genai sample to match that in JS SDK.

The main change is to expanded GenAI sample flows: The google-genai-hello sample has been significantly expanded with numerous new flows demonstrating advanced capabilities of Google's Generative AI models, including multimodal interactions, image editing, video understanding, and various configuration options.
Vertex AI Sample is also added to showcase Google GenAI functionalities specifically tailored for the Vertex AI platform, including video understanding with metadata and Google Maps grounding.
Improvements have been made to how multimodal content within tool responses is processed and converted, allowing for the extraction of media parts (e.g., base64 encoded images) from tool outputs.
The Google GenAI plugin now supports dynamic API versioning, allowing specific API versions (e.g., 'v1alpha') to be set via request configuration. Additionally, GeminiConfigSchema has been extended with new fields like thinking_config, file_search, and url_context.

gemini-code-assist · 2026-01-13T23:52:27Z

Summary of Changes

Hello @MengqinShen, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the GenAI Python samples by introducing a wide array of new demonstration flows for both Google AI and Vertex AI platforms. The changes enable more sophisticated interactions with generative models, particularly in multimodal contexts and advanced configuration scenarios, making the samples more comprehensive and illustrative of the platform's capabilities.

Highlights

Expanded GenAI Sample Flows: The google-genai-hello sample has been significantly expanded with numerous new flows demonstrating advanced capabilities of Google's Generative AI models, including multimodal interactions, image editing, video understanding, and various configuration options.
Vertex AI Sample: A new sample file, main_vertexai.py, has been added to showcase Google GenAI functionalities specifically tailored for the Vertex AI platform, including video understanding with metadata and Google Maps grounding.
Multimodal Tool Response Handling: Improvements have been made to how multimodal content within tool responses is processed and converted, allowing for the extraction of media parts (e.g., base64 encoded images) from tool outputs.
Dynamic API Versioning and Configuration: The Google GenAI plugin now supports dynamic API versioning, allowing specific API versions (e.g., 'v1alpha') to be set via request configuration. Additionally, GeminiConfigSchema has been extended with new fields like thinking_config, file_search, and url_context.
Robust Tool Definition Handling: The system now ensures that tool parameters are correctly initialized as an empty object for no-argument tools, preventing potential issues with tool invocation.

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Code Review

This pull request adds several new flows to the genai sample, demonstrating features like multipart tool calling, image editing, video generation, and various Gemini 3.0 configurations. It also includes refactoring in the core library to support these new capabilities, such as handling different API versions and multimodal tool responses.

I've identified a few issues, including some brittle code that relies on private library members, a critical logic error in one of the new sample flows where code is unreachable, and some minor style issues. Please see my detailed comments for suggestions.

py/samples/google-genai-hello/src/main.py

py/plugins/google-genai/src/genkit/plugins/google_genai/models/gemini.py

py/packages/genkit/src/genkit/blocks/generate.py

py/plugins/google-genai/src/genkit/plugins/google_genai/models/gemini.py

Co-authored-by: Mengqin Shen <mengqin@google.com>

feat(py/genkit): add define_partial for Handlebars partials Expose define_partial in GenkitRegistry class for parity with JS SDK. Allows programmatic registration of reusable template fragments.

… veneer_test.py (#4091)

# Conflicts: # py/packages/genkit/src/genkit/blocks/generate.py # py/samples/google-genai-hello/src/main.py

MengqinShen · 2026-01-14T06:09:55Z

History is too messy, change it to PR #4124

fix(py): add more flows to genai sample

2b70949

github-project-automation bot added this to Genkit Backlog Jan 13, 2026

github-actions bot added python Python fix labels Jan 13, 2026

fix(py): add more flows to genai sample

88db98e

gemini-code-assist bot reviewed Jan 13, 2026

View reviewed changes

fix(py): update with gemini comments

5ce1052

github-actions bot added js config labels Jan 14, 2026

MengqinShen and others added 20 commits January 13, 2026 16:43

fix(py): update README for vertexai-image sample (#4081)

2b42f60

Co-authored-by: Mengqin Shen <mengqin@google.com>

fix(go/plugins/anthropic): update schema config (#4080)

4908c65

chore(go): added Godocs to generated types (#4075)

1604f90

feat(py): Implemented deepseek plugin (#4051)

f37ea15

feat(py/genkit): add define_partial for Handlebars partials (#4088)

6a5576c

feat(py/genkit): add define_partial for Handlebars partials Expose define_partial in GenkitRegistry class for parity with JS SDK. Allows programmatic registration of reusable template fragments.

fix(py/genkit): tox coverage failure and formatting (#4089)

561631c

fix(py/genkit): re-enable some disabled tests and fix test capture in…

664162f

… veneer_test.py (#4091)

fix(py): resolve pyproject.toml license deprecation warnings (#4092)

0c12f94

fix(py/genkit): resolve Pydantic serialization warnings in resources (#…

73da68c

…4093)

build(py/genkit): switch to ty for stricter and faster type checks (#…

5ac3483

…4094)

fix(py/genkit): fix type errors reported by ty in typing sanitizer (#…

5f9c5c6

…4095)

fix(go): fixed panic when stream value is nil (#4102)

ae24868

chore(go): improved the Genkit Go package docs (#4086)

fd55a05

fix(go): fixed bad dotprompt output format parsing (#4109)

74b1ae7

feat(go): added support for sessions (#4067)

c5e906f

fix(go): fixed missing thought signatures on tool responses (#4115)

f8f7181

refactor(js/plugins/anthropic): extract out some shared converters (#…

41bcfdf

…4046)

fix(py): add more flows to genai sample

890f37d

# Conflicts: # py/packages/genkit/src/genkit/blocks/generate.py # py/samples/google-genai-hello/src/main.py

fix(py): update with gemini comments

556621b

fix(py): fix AssertionError in test_googlegenai_gemini.py

7187cb9

fix(py): resolve validation errors and config issues

0420a05

github-actions bot added docs Improvements or additions to documentation go labels Jan 14, 2026

MengqinShen requested a review from yesudeep January 14, 2026 04:23

MengqinShen marked this pull request as ready for review January 14, 2026 04:23

MengqinShen enabled auto-merge (squash) January 14, 2026 04:24

MengqinShen marked this pull request as draft January 14, 2026 04:30

auto-merge was automatically disabled January 14, 2026 04:30
Pull request was converted to draft

MengqinShen closed this Jan 14, 2026

github-project-automation bot moved this to Done in Genkit Backlog Jan 14, 2026

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