Python: [BREAKING] Renamed AgentRunContext to AgentContext

[dmytrostruk]

Motivation and Context

Resolves: #3676

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
packages/core/agent_framework
_middleware.py	329	16	95%	80, 83, 88, 797, 799, 801, 922, 949, 951, 976, 1057, 1061, 1185, 1189, 1250, 1324
_serialization.py	105	4	96%	516, 532, 542, 610
packages/purview/agent_framework_purview
_middleware.py	95	0	100%
TOTAL	16515	2008	87%

Python Unit Test Overview

Tests	Skipped	Failures	Errors	Time
3911	225 💤	0 ❌	0 🔥	1m 5s ⏱️

[Copilot]

Pull request overview

This pull request implements a breaking change that renames AgentRunContext to AgentContext across the Python implementation of the Agent Framework. This change resolves issue #3676 and simplifies the naming convention for the agent middleware context object.

Changes:

• Renamed the AgentRunContext class to AgentContext in the core middleware module
• Updated all imports, type hints, and references across test files, samples, and documentation
• Updated serialization documentation examples to reflect the new naming

Reviewed changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
python/packages/core/agent_framework/_middleware.py	Core class rename from AgentRunContext to AgentContext, including class definition, docstrings, type aliases, and __all__ exports
python/packages/core/agent_framework/_serialization.py	Updated serialization documentation examples to use AgentContext and agent_context type identifier
python/packages/core/AGENTS.md	Updated architecture documentation and code examples to reference AgentContext
python/packages/core/tests/core/test_middleware.py	Updated test class name from TestAgentRunContext to TestAgentContext and all type hints
python/packages/core/tests/core/test_middleware_with_agent.py	Updated all middleware type hints and docstrings to use AgentContext
python/packages/core/tests/core/test_middleware_context_result.py	Updated all imports and type hints to use AgentContext
python/packages/core/tests/core/test_as_tool_kwargs_propagation.py	Updated imports and middleware type hints
python/packages/purview/agent_framework_purview/_middleware.py	Updated middleware implementation to use AgentContext
python/packages/purview/tests/test_middleware.py	Updated all test fixtures and type hints
python/samples/getting_started/middleware/*.py	Updated all middleware sample files to use AgentContext in imports, type hints, and comments
python/samples/getting_started/middleware/README.md	Updated documentation to reference AgentContext
python/samples/concepts/tools/README.md	Updated sequence diagram documentation to use AgentContext