Support nested sub agents #262
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- Enhanced service.py to handle sub-agent message filtering - Added langgraph_supervisor_hierarchy_agent.py with 3-layer hierarchy example - Added comprehensive test for hierarchical agent message flow - Updated test fixtures for better import handling This builds on upstream's basic subgraph support (2e6c622) by adding: - Sophisticated node detection for supervisors and sub-agents - Proper message handling for handback tools and results - Support for nested agent hierarchies with proper naming conventions
Enhanced Streamlit UI to properly display nested agent hierarchies: - Different visual indicators for sub-agents (💼) vs tools (🛠️) - Recursive handling of nested sub-agent transfers - Proper status container management for multi-level hierarchies - Support for transfer_back_to handoff messages - Expanded status containers for better visibility - Updated tests to match new UI labels This complements the service layer changes by providing a clear visual representation of complex agent hierarchies in the UI.
Added test fixtures and test cases to validate: - Multi-agent message fixtures for reusable test data - Hierarchical sub-agent UI rendering with proper status containers - Visual indicators (💼 for sub-agents, 🛠️ for tools) - Popover functionality for tool calls within sub-agents - Proper message flow through transfer_to/transfer_back_to patterns These tests ensure the UI correctly displays complex agent hierarchies with proper visual organization and user experience.
Added three critical test patterns for hierarchical sub-agents: 1. test_app_streaming_single_sub_agent: - Tests single sub-agent with multiple tool calls - Validates popover functionality for tools within sub-agents - Ensures proper status container organization 2. test_app_streaming_sequential_sub_agents: - Tests supervisor -> agent A -> supervisor -> agent C -> supervisor flow - Validates sequential agent handoffs with proper UI separation - Ensures multiple status containers are handled correctly 3. test_app_streaming_nested_sub_agents: - Tests true nesting: supervisor -> agent A -> agent B -> agent A -> supervisor - Validates recursive status container nesting - Ensures proper visual hierarchy for deeply nested agents These tests provide comprehensive coverage of all hierarchical patterns and ensure the UI correctly handles complex multi-agent workflows.
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I’m traveling the next few days but will take a look at this next week, thanks! |
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This is awesome!! Thank you @aperkins1310 !!! |
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Firstly thanks, this project is super helpful and so I've made a bunch of changes that I'll submit back to upstream to try give back a bit.
The first of which is this, supporting more complex hierarchies of agents. Such as:
This is the existing "supervisor + 2 siblings" 2-layer system:
A few bits of note:
STOPeven for tool calls. An explicit handback message makes this work across all models. Also included tests.supervisor,research_expertandmath_expert. Now the only requirement is supervisor graphs containsupervisor, and sub agents containsub-agentin their names. Thelanggraph_supervisor_hierarchy_agentshows how to handle the "middle" layers, which are both supervisors and sub agents. Included tests for the service behaviour.memory/__init__.py