[ZedingZhang (ZedingZhang)]

Motivation & Context

The isolated A2A dependency-bounds test environment cannot collect test_a2a_group_chat.py because it imports agent_framework.orchestrations, but A2A does not declare the corresponding test dependency. This prevents the weekly dependency-maintenance workflow from reaching upper-bound validation.

Description & Review Guide

• What are the major changes? Add agent-framework-orchestrations to A2A's test dependency group, following the existing AG-UI configuration, and refresh uv.lock. Add a regression test against the real A2A dependency-bounds plan to ensure the local orchestrations package is included.
• What is the impact of these changes? A2A's isolated lowest-direct and highest scenarios now complete their unit-test and Pyright tasks. The dependency is limited to testing; the built wheel's runtime requirements are unchanged.
• What do you want reviewers to focus on? The test-only dependency declaration and the regression test's coverage of the generated isolated environment.

Related Issue

Fixes #9519.

This is a trivial test-environment configuration correction: existing A2A tests already import agent_framework.orchestrations, but the package does not declare the corresponding test dependency. This change adds
that missing declaration using the existing AG-UI test dependency pattern, updates the lockfile, and adds a regression test. It restores the intended isolated CI test environment without changing public APIs or published runtime requirements.

No competing open PR was found.

AI Assistance

• No material AI assistance was used.
• This is an AI-assisted contribution.

AI assistance details: Codex assisted with issue analysis, reproduction, implementation, the regression test, verification, and this PR description. I have reviewed all submitted content and take resonsibility for it.

Contribution Checklist

• The code builds clean without any errors or warnings
• All unit tests pass, and I have added new tests where possible
• The PR follows the Contribution Guidelines
• This PR links to an agreed issue with no competing open PR, or the Related Issue section documents a trivial-change or repository-automation exception.
• This is not a breaking change. If it is a breaking change, add the breaking change label (or add "[BREAKING]" to the title prefix, before or after any language prefix) — a workflow keeps the label and title prefix in sync automatically.

The affected A2A test/typing scenarios, all dependency-runtime tests, formatting/lint, lockfile check, package build, and commit hooks pass. A broader dependency-script test run has one existing Windows path-separator assertion failure in test_release_probe_uses_only_the_required_internal_dependency_closure; the same failure was reproduced from an unmodified base-commit snapshot.

The advisory Public API Compatibility job fails in Griffe 2.4.0 with AliasResolutionError for EdgeGroup.builtin_type -> builtins.type. The same error was reproduced by comparing the unmodified base commit a8e284ca8ce7c2a6b4a4641ef35e131d75a5cda3 against an extracted copy of itself. The remaining fork test workflows are awaiting maintainer approval.

[Copilot]

🟢 Approval recommended

The dependency declaration, lockfile, and regression test are consistent, with no blocking issues identified.

No open issues 🎉

What changed in this PR

Fixes the A2A isolated dependency-bounds test environment described in #9519 by including the orchestration package needed during test collection, without changing runtime requirements.

Changes:

• Adds agent-framework-orchestrations to A2A’s test dependency group.
• Updates the lockfile to reflect the test-only dependency.
• Adds a regression test confirming the A2A test plan includes the local orchestration package.

File	Description
python/​uv.lock	Records A2A’s orchestration test dependency.
python/​scripts/​dependencies/​tests/​test_dependency_bounds_runtime.py	Verifies the real A2A plan includes local orchestrations.
python/​packages/​a2a/​pyproject.toml	Declares the missing test-only dependency.

_{Review effort: Balanced}