🚀 Major Enhancement: Workflow-Based Tool Architecture v5.5.0 (#95)

* WIP: new workflow architecture

* WIP: further improvements and cleanup

* WIP: cleanup and docks, replace old tool with new

* WIP: cleanup and docks, replace old tool with new

* WIP: new planner implementation using workflow

* WIP: precommit tool working as a workflow instead of a basic tool
Support for passing False to use_assistant_model to skip external models completely and use Claude only

* WIP: precommit workflow version swapped with old

* WIP: codereview

* WIP: replaced codereview

* WIP: replaced codereview

* WIP: replaced refactor

* WIP: workflow for thinkdeep

* WIP: ensure files get embedded correctly

* WIP: thinkdeep replaced with workflow version

* WIP: improved messaging when an external model's response is received

* WIP: analyze tool swapped

* WIP: updated tests
* Extract only the content when building history
* Use "relevant_files" for workflow tools only

* WIP: updated tests
* Extract only the content when building history
* Use "relevant_files" for workflow tools only

* WIP: fixed get_completion_next_steps_message missing param

* Fixed tests
Request for files consistently

* Fixed tests
Request for files consistently

* Fixed tests

* New testgen workflow tool
Updated docs

* Swap testgen workflow

* Fix CI test failures by excluding API-dependent tests

- Update GitHub Actions workflow to exclude simulation tests that require API keys
- Fix collaboration tests to properly mock workflow tool expert analysis calls
- Update test assertions to handle new workflow tool response format
- Ensure unit tests run without external API dependencies in CI

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* WIP - Update tests to match new tools

* WIP - Update tests to match new tools

---------

Co-authored-by: Claude <noreply@anthropic.com>

tools/workflow/__init__.py

@@ -0,0 +1,22 @@
+"""
+Workflow tools for Zen MCP.
+
+Workflow tools follow a multi-step pattern with forced pauses between steps
+to encourage thorough investigation and analysis. They inherit from WorkflowTool
+which combines BaseTool with BaseWorkflowMixin.
+
+Available workflow tools:
+- debug: Systematic investigation and root cause analysis
+- planner: Sequential planning (special case - no AI calls)
+- analyze: Code analysis workflow
+- codereview: Code review workflow
+- precommit: Pre-commit validation workflow
+- refactor: Refactoring analysis workflow
+- thinkdeep: Deep thinking workflow
+"""
+
+from .base import WorkflowTool
+from .schema_builders import WorkflowSchemaBuilder
+from .workflow_mixin import BaseWorkflowMixin
+
+__all__ = ["WorkflowTool", "WorkflowSchemaBuilder", "BaseWorkflowMixin"]