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Documentation Index

Fetch the complete documentation index at: https://docs.idun-group.com/llms.txt

Use this file to discover all available pages before exploring further.

Idun Engine wraps your agent code into a FastAPI service through framework-specific adapters. You write your agent in the framework you prefer, and the engine handles streaming, checkpointing, guardrails, and observability through a unified API. Each adapter implements a common BaseAgent protocol. Your clients talk to the same HTTP API regardless of the underlying framework.

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Supported frameworks

LangGraph

Graph-based agents with full AG-UI streaming, checkpointing (in-memory, SQLite, PostgreSQL), and CopilotKit support. Has the most complete feature coverage of the supported frameworks.

Google ADK

Google’s Agent Development Kit for Gemini-powered agents. Supports session and memory services through in-memory, Vertex AI, or database backends.

Deep Agents

LangChain’s framework for agents that plan, write to a virtual filesystem, and spawn subagents. Runs as a regular LangGraph agent in Idun (no separate adapter, no glue code).

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Documentation and source code

FrameworkDocsRepo
LangGraphdocs.langchain.com/oss/python/langgraphgithub.com/langchain-ai/langgraph
Google ADKgoogle.github.io/adk-docsgithub.com/google/adk-python
Deep Agentsdocs.langchain.com/oss/python/deepagentsgithub.com/langchain-ai/deepagents
Haystack support was removed in 0.6.0. Existing Haystack agent configs need to be ported to LangGraph or ADK before upgrading.

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Feature comparison

FeatureLangGraphGoogle ADK
AG-UI streamingYesYes
Checkpointing / memoryIn-memory, SQLite, PostgreSQLIn-memory, Vertex AI, Database
CopilotKit supportYesNo
GuardrailsYesYes
ObservabilityYesYes
MCP serversYesYes

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How adapters work

Under the hood, the engine loads your agent through the adapter specified in your configuration. This gives you:
  • Unified API: All agents expose the same HTTP endpoints for invoke, streaming, and chat.
  • Shared platform features: Observability, guardrails, MCP tools, and memory work the same way across frameworks.
  • Consistent deployment: The same idun serve command runs any supported framework.
Select the framework by setting the type field in the agent section of your config.yaml: 
agent:
  type: LANGGRAPH    # or ADK
  config:
    # framework-specific fields
The engine validates that the config shape matches the selected type at startup. The standalone admin panel at /admin/agent/ exposes the same field with a dropdown when you want to switch frameworks without editing YAML.

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Next steps

LangGraph integration guide

Graph-based agents with full AG-UI streaming, checkpointing, and CopilotKit support.

Google ADK integration guide

Google’s Agent Development Kit for Gemini-powered agents with session and memory services.

Custom adapter

Build your own adapter to bring a different agent framework into Idun Engine.

Configuration reference

Full schema for config.yaml including agent, guardrails, MCP, observability, and more.
Last modified on May 22, 2026