feat: Add A2A chat client library and iframe application

[hartra344]

Commit Type

• [x] feature - New functionality

Risk Level

• [ ] Low - Minor changes, limited scope
• [ ] Medium - Moderate changes, some user impact
• [x] High - Major changes, significant user/system impact

Low because it's just a code migration, no actual changes to any production code at all.

What & Why

Add a comprehensive Agent-to-Agent (A2A) communication library and iframe application for embedding chat functionality in parent applications. This enables chat capabilities for the Logic Apps designer integration with AI agents.

Impact of Change

• Users: New chat interface available for interacting with AI agents within the designer
• Developers: New @microsoft/a2a-core library with React components, hooks, and client APIs for A2A communication
• System: Adds new packages (a2a-core, iframe-app) and E2E test infrastructure for chat client

Test Plan

• [x] Unit tests added/updated
• [x] E2E tests added/updated
• [ ] Manual testing completed
• Tested in: Unit tests for a2a-core library, E2E tests for chat client flows

Contributors

Screenshots/Videos

[github-actions[bot]]

🤖 AI PR Validation Report

PR Review Results

Thank you for your submission! Here's detailed feedback on your PR title and body compliance:

✅ PR Title

• Current: feat: Add A2A chat client library and iframe application
• Issue: Title is concise and clear, describing feature work (new chat client and iframe app)
• Recommendation: No change needed. Title meets high-quality standards.

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✅ Commit Type

• Properly selected (feature)
• Only one selected, which is correct

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✅ Risk Level

• Risk labeled as High and matches PR body and code change magnitude

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✅ What & Why

• Current: Add a comprehensive Agent-to-Agent (A2A) communication library and iframe application for embedding chat functionality in parent applications. This enables chat capabilities for the Logic Apps designer integration with AI agents.
• Issue: None. Provides clear, brief context
• Recommendation: No change needed

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✅ Impact of Change

• Impact well indicated for Users, Developers, and System
• Recommendation:
  • Users: Clear, new chat interface for users
  • Developers: New library and APIs called out
  • System: Changes to packages and test infra explained

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✅ Test Plan

• Multiple test forms selected. Details provided on what was tested.

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⚠️ Contributors

• Contributors section is blank
• Recommendation: Tag PMs, designers, and contributors for credit. Example: @designer @pm-name @developer

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⚠️ Screenshots/Videos

• Blank, but if the change is largely visual (message widgets, UI embedding), screenshots/videos are recommended.
• Recommendation: Add screenshots or a quick demo if any UI was visually changed to help reviewers and documentation (not required, but helpful).

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Summary Table

Section	Status	Recommendation
Title	✅	No changes needed
Commit Type	✅	No changes needed
Risk Level	✅	No changes needed
What & Why	✅	No changes needed
Impact of Change	✅	No changes needed
Test Plan	✅	No changes needed
Contributors	⚠️	Consider tagging contributors
Screenshots/Videos	⚠️	Consider adding screenshots/videos if UI was changed

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Please add contributor credits and screenshots if possible/appropriate, then you're ready to proceed. Excellent work in documenting and labeling your PR!

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Last updated: Fri, 28 Nov 2025 06:40:08 GMT