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Eduard van Valkenburg 5ee06853a1 Python: [BREAKING] Redesign Python exception hierarchy (#4082 )

* [BREAKING] Redesign Python exception hierarchy

Replace the flat ServiceException family with domain-scoped branches:
- AgentException (with InvalidAuth, InvalidRequest, InvalidResponse, ContentFilter)
- ChatClientException (same consistent suberrors)
- IntegrationException (same + InitializationError)
- WorkflowException (Runner, Convergence, Checkpoint, Validation, Action, Declarative)
- ContentError (AdditionItemMismatch)
- ToolException / ToolExecutionException (unchanged)
- MiddlewareException / MiddlewareTermination (unchanged)

Key changes:
- All Service* exceptions removed (ServiceException, ServiceInitializationError, etc.)
- AgentExecutionException split into AgentInvalidRequest/ResponseException
- AgentInvocationError removed, split into AgentInvalidRequest/ResponseException
- Workflow exceptions moved from _workflows/_exceptions.py into main exceptions.py
- _workflows/__init__.py emptied; main __init__.py imports directly from submodules
- Purview exceptions re-parented under IntegrationException hierarchy
- Init validation errors use built-in ValueError/TypeError instead of custom exceptions
- CODING_STANDARD.md updated with hierarchy design and rationale

Fixes microsoft/agent-framework#3410

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Clarify ToolException vs ToolExecutionException docstrings

ToolException: base class for all tool-related exceptions (preconditions,
connection/init failures).
ToolExecutionException: runtime call failures (tool call failed, reconnect
failed, MCP errors).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix remaining stale imports from agent_framework._workflows

- azurefunctions: _context.py, _app.py, _serialization.py, test_func_utils.py
  used 'from agent_framework._workflows import X' which broke after
  emptying _workflows/__init__.py; changed to direct submodule imports
- azure-ai-search: test still referenced ServiceInitializationError;
  updated to ValueError to match production code

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

5ee06853a1 · 2026-02-19 17:58:14 +00:00

History

agent_framework_declarative

Python: [BREAKING] Redesign Python exception hierarchy (#4082 )

2026-02-19 17:58:14 +00:00

tests

Python: [BREAKING] Redesign Python exception hierarchy (#4082 )

2026-02-19 17:58:14 +00:00

AGENTS.md

Python: Fix code samples in AGENTS.md files that fail pre-commit checks (#3779 )

2026-02-10 07:15:36 +00:00

LICENSE

Python: Introducing support for declarative yaml spec (#2002 )

2025-11-19 16:33:02 +00:00

pyproject.toml

Python: Updated package versions for RC release (#4068 )

2026-02-19 16:11:48 +00:00

README.md

Python: Introducing support for declarative yaml spec (#2002 )

2025-11-19 16:33:02 +00:00

README.md

Get Started with Microsoft Agent Framework Declarative

Please install this package via pip:

pip install agent-framework-declarative --pre

Declarative features

The declarative packages provides support for building agents based on a declarative yaml specification.