chore(py): Bump Python SDK version to 0.6.0

[huangjeff5]

Python SDK v0.6.0 Release Notes

This release bumps the Genkit Python SDK to version 0.6.0.

New Features

• Dynamic Tools: Add support for dynamically defined tools (feat(py): Add support for dynamically defined tools #5214).
• Tool Restarts & Interrupts: Add tool restarts and refactor Interrupts (feat(py): add tool restarts and refactor Interrupts #5069) and add interrupt metadata so that they're rendered w/ special callouts in Dev UI (feat(py): add interrupt metadata to support Dev UI #5260).

Existing API Changes

• Breaking change: When executing prompts, options have been flattened into standard Python keyword arguments.

# OLD (v0.5.2):
response = await my_prompt(input_data, {'config': {'temperature': 0.7}})

# NEW (v0.6.0):
response = await my_prompt(input_data, config={'temperature': 0.7})

In your Genkit code, if you invoke prompts with custom configuration defined in code, you will need to migrate your usage code such that config is named as an explicit kwarg.

• Non-breaking change: Decorator @ai.tool returns a Tool wrapper instead of the raw function.

In v0.5.2, decorating a function with @ai.tool registered the action behind the scenes, but returned the original raw Python function. In v0.6.0, decorating a function with @ai.tool now returns a wrapper instance of the Tool class. This change shouldn't require any migration on your end for typical Genkit usage.

Bug Fixes & Refactoring

• Code Execution: Fix code execution serialization issue for googleai plugin (fix(py): Fix code execution serialization issue for googleai plugin #5326).
• Async Safety: Make plugin init state loop-local to fix cross-loop Task error (fix(py): Make plugin init state loop-local to fix cross-loop Task error #5262).
• Telemetry: Fix double generate span in model runner (fix(py): fix double generate span in model runner #5113).
• Validation: Enforce object root JSON Schema for tool inputs at define_tool (fix(py): enforce object root JSON Schema for tool inputs at define_tool #5059) and parallelize tool calls in generate loop (fix(py): parallelize tool calls in generate loop #5054).
• Dependencies & Configuration: Fix pyproject.toml on fastapi plugin (fix(py): Fix pyproject.toml on fastapi plugin #5030) and bump mistune dependency (chore(deps): bump mistune from 3.2.0 to 3.2.1 in /py #5289).
• Repository URL Migration: Update repository URLs and references from firebase/genkit to genkit-ai/genkit (chore(global): update repository URLs and references from firebase/genkit to genkit-ai/genkit #5155).
• Samples: Update samples to use gemini-*latest (chore(py): Update samples to use gemini-*latest #5328).
• Reflection Server v2: Implement reflection server v2 support (feat(py): Implement reflection server v2 #5186). Hidden behind flag.
• Expose ActionRunContext in Dev UI correctly.: Before it was propagating correctly but not showing up in the Dev UI, now it is (fix(py): surface action context on span metadata so Dev UI can render it #5364).
• Observability & Spans: Unify span creation through run_in_new_span + hand-write SpanMetadata (chore(py): unify span creation through run_in_new_span + hand-write SpanMetadata #5311).

[gemini-code-assist]

Code Review

This pull request updates the version of the Genkit Python package and its associated plugins from 0.5.2 to 0.6.0. It also introduces a new sample application, flow-sample1, which demonstrates core framework features such as traced steps, streaming, and error handling. Feedback was provided regarding a redundant string conversion in the new sample code.