Python: Add BaseAgent implementation for Claude Agent SDK

[dmytrostruk]

Motivation and Context

This PR adds agent-framework-claude package that wraps the Claude Agent SDK to provide Claude agentic capabilities within the Agent Framework.

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the Contribution Guidelines
• All unit tests pass, and I have added new tests where possible
• Is this a breaking change? If yes, add "[BREAKING]" prefix to the title of the PR.

[markwallace-microsoft]

Python Test Coverage Report •

File	Stmts	Miss	Cover	Missing
TOTAL	16249	2024	87%

report-only-changed-files is enabled. No files were changed during this commit :)

Python Unit Test Overview

Tests	Skipped	Failures	Errors	Time
3718	221 💤	0 ❌	0 🔥	1m 7s ⏱️

[Copilot]

Pull request overview

This PR adds support for the Claude Agent SDK integration to the Agent Framework by introducing the agent-framework-claude package. It enables developers to use Claude's agentic capabilities (via Claude Code CLI) within the Agent Framework, including tool use, session management, and streaming responses.

Changes:

• Added new agent-framework-claude package with ClaudeAgent implementation that wraps the Claude Agent SDK
• Integrated Claude Agent exports into the agent_framework.anthropic namespace for easy access
• Added comprehensive unit tests covering agent initialization, session management, tool conversion, and streaming
• Provided 7 sample files demonstrating various Claude Agent features (basic usage, tools, permissions, MCP, sessions)

Reviewed changes

Copilot reviewed 19 out of 20 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
python/uv.lock	Added claude-agent-sdk dependency (v0.1.25) and updated package list to include agent-framework-claude
python/pyproject.toml	Added agent-framework-claude to workspace members
python/packages/claude/pyproject.toml	Package configuration for new agent-framework-claude package with dependencies and build settings
python/packages/claude/agent_framework_claude/__init__.py	Package initialization exporting ClaudeAgent, ClaudeAgentOptions, and ClaudeAgentSettings
python/packages/claude/agent_framework_claude/_agent.py	Core ClaudeAgent implementation with session management, tool conversion, and streaming support
python/packages/claude/agent_framework_claude/_settings.py	Settings class for Claude Agent configuration via environment variables
python/packages/claude/tests/test_claude_agent.py	Comprehensive unit tests (709 lines) covering all agent functionality
python/packages/core/agent_framework/anthropic/__init__.py	Updated lazy loading to include Claude Agent exports
python/packages/core/agent_framework/anthropic/__init__.pyi	Added type stubs for Claude Agent exports
python/samples/getting_started/agents/anthropic/*.py	Seven sample files demonstrating Claude Agent usage patterns
python/samples/getting_started/agents/anthropic/README.md	Updated documentation with Claude Agent examples and environment variables
python/packages/claude/LICENSE	MIT license file for the package
python/packages/claude/README.md	Package readme with installation instructions

Comments suppressed due to low confidence (1)

python/packages/claude/agent_framework_claude/_agent.py:219

• The type annotation should use AgentMiddlewareTypes instead of Middleware for consistency with other agent implementations in the codebase. See python/packages/github_copilot/agent_framework_github_copilot/_agent.py:148.

        middleware: Sequence[Middleware] | None = None,