Feature: Engine-Agnostic Human-in-the-Loop (HITL) via Chat Interface

[nehmetohmedb]

Summary

Implement Human-in-the-Loop (HITL) functionality through Kasal's existing chat interface, integrating with CrewAI's backend HIL support and providing an engine-agnostic framework for future AI engines.

Current State

• CrewAI backend has human_input support in Task model
• Kasal has assistant chat panel for user interaction
• No integration between CrewAI HIL and chat interface
• HITL functionality limited to CrewAI engine only

Proposed Solution

Core Features

• Chat-based Interventions: Human input/approval through chat messages
• Real-time Prompts: Chat notifications when human input needed
• Inline Feedback: Approve/reject/modify responses directly in chat
• Engine-Agnostic Framework: Adapter pattern for future engines
• Execution Control: Pause/resume workflows via chat commands

Chat Integration

• Display intervention requests as special chat messages
• Collect human responses through chat input
• Show execution status updates in chat timeline
• Support rich input formats (buttons, forms, file uploads)

Technical Implementation

• Extend existing chat WebSocket connection for HITL events
• Create EngineHITLAdapter abstraction for different engines
• Enhance CrewAI integration to emit chat intervention events
• Add chat message types for HITL interactions
• Implement execution pause/resume through chat interface

Key Components

• HITLChatService: Chat-based intervention handler
• CrewAIHITLAdapter: Integration with existing CrewAI HIL
• Chat message extensions for intervention UI
• WebSocket event handlers for real-time HITL
• Execution state management for pause/resume

Benefits

• Leverage existing chat interface familiarity
• Seamless integration with current user workflow
• Support for future AI engine integrations
• Real-time human oversight and control
• No additional UI complexity

Priority: High