ci: add release-please automation with versioned branch workflow

[Jacksunwei]

Summary

Adds automated release workflow using release-please with versioned branches.

Release Process

Step	Action	Trigger	How
1	Cut release branch	Manual	Run Cut Release Branch workflow → enter version (optionally specify commit SHA)
2	Test	Manual	uv pip install git+...@release/v0.3.0
3	Review CHANGELOG	Auto	Release-please creates PR → review and merge
4	Draft release created	Auto	Created when CHANGELOG PR is merged
5	Publish release	Manual	GitHub Releases → Edit draft → Publish
6	Publish to PyPI	Manual	Run Publish to PyPI workflow → enter version
7	Sync to main	Auto	Merge-back PR created → merge

Cherry-pick to Release

To include additional commits after cutting the release branch:

• Run Cherry-pick to Release workflow → enter version and commit SHA
• Release-please will update the CHANGELOG PR automatically

Setup Required

• Add PYPI_TOKEN secret for PyPI publishing

[gemini-code-assist]

Summary of Changes

Hello @Jacksunwei, 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 establishes a comprehensive continuous integration and delivery pipeline designed to streamline the release process for the google-adk-community Python package. By integrating release-please and a versioned branch workflow, it automates version bumping, changelog generation, and the creation of GitHub releases, culminating in automatic publication to PyPI. This setup aims to enhance release consistency and efficiency while maintaining a clear separation between development on main and release preparation.

Highlights

• Automated Release Management: Implements release-please for automated Python package versioning, changelog generation, and GitHub releases.
• Versioned Branch Workflow: Introduces a release/vX.Y.Z branch strategy to manage releases, allowing main to remain unblocked during release preparation.
• PyPI Publishing: Configures GitHub Actions to automatically publish the Python package to PyPI upon a new GitHub release.
• New CI/CD Configuration: Adds release-please configuration files and GitHub Actions workflows for cutting release branches, running release-please, and publishing to PyPI.

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Changelog

• .github/.release-please-manifest.json
  • Initializes the release-please manifest, setting the starting version for the project to 0.2.0.
• .github/release-please-config.json
  • Configures release-please for a Python project, specifying google-adk-community as the package name.
  • Defines the path for the CHANGELOG.md and an extra-file (src/google/adk_community/version.py) to be updated with new versions.
  • Customizes changelog sections based on conventional commit types, making certain types (test, build, ci, style, chore) hidden from the public changelog.

Ignored Files

• Ignored by pattern: .github/workflows/** (3)
  • .github/workflows/cut-release-branch.yml
  • .github/workflows/publish-pypi.yml
  • .github/workflows/release-please.yml

Activity

• The pull request introduces a new, detailed release workflow.
• It outlines the steps from development on main to creating versioned release branches.
• It describes how release-please will automate version bumps and changelog updates via pull requests.
• It specifies that merging these PRs will trigger GitHub releases and subsequent PyPI publishing.
• A requirement for a PYPI_TOKEN secret for PyPI publishing is noted.

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[gemini-code-assist]

Code Review

This pull request introduces release-please automation for managing Python package releases. The configuration is well-structured and follows a versioned branch workflow, which is a great strategy. I've made one suggestion to use a more idiomatic configuration option in the release-please-config.json file to improve clarity. Otherwise, the changes look good.

[gemini-code-assist]

For the python release type, it's more idiomatic to use the version_file property to specify the file containing the version string. While extra-files works, version_file is more specific to the Python release strategy and makes the configuration clearer about its intent to update the Python package version.

      "version_file": "src/google/adk_community/version.py",

[Jacksunwei]

/gemini review

[gemini-code-assist]

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