refactor: Remove focus_areas parameter from agent tool

[plusplusoneplusplus]

Summary

This PR removes the focus_areas parameter from the MCP agent tool and all related components throughout the automation plugin. This simplifies the interface by reducing parameter complexity while maintaining functionality through the existing constraints parameter.

Changes Made

Core Components

• agent_tool.py: Removed focus_areas from input schema and implementation
• explore_agent.py: Removed focus_areas parameter from prepare_context() and explore() methods
• agent_step.py: Removed focus_areas extraction and passing to agent methods
• ai_split.py: Removed focus_areas from operation inputs and prompt building

Configuration

• ai_exploration_workflow.yaml: Removed focus_areas input definition from workflow

Documentation

• README.md: Updated API documentation and examples to remove focus_areas references

Tests

• test_agent_tool.py: Updated tests to remove focus_areas assertions
• test_ai_split_operation.py: Refactored tests to use constraints instead of focus_areas
• test_explore_agent.py: Updated context preparation tests to remove focus_areas

Testing

All automation plugin tests pass successfully:

• ✅ test_agent_tool.py: 22/22 passed
• ✅ test_ai_split_operation.py: 15/15 passed
• ✅ test_explore_agent.py: 24/24 passed
• ✅ Full automation test suite: 176/176 passed

Migration Path

Users who were using focus_areas can achieve similar functionality by using the constraints parameter in workflows. For example:

Before:

inputs:
  focus_areas: ["security", "performance"]

After:

inputs:
  constraints: "Focus on security and performance aspects"

Impact

• Breaking Change: The focus_areas parameter is no longer available
• API Surface: Simplified API with fewer parameters to understand
• Functionality: No loss of functionality - constraints can be expressed through the constraints parameter

🤖 Generated with Claude Code