DLGCompiler / DLGEngine API Reference

DLGEngine (recommended)

DLGEngine(config: dict | GraphConfig)

Method	Description
`build() -> CompiledStateGraph`	Validates then compiles.
`from_file(path) -> CompiledStateGraph`	Classmethod — load + validate + compile.

DLGCompiler (low-level)

DLGCompiler(config: dict | GraphConfig)

Method	Description
`compile() -> CompiledStateGraph`	Compiles without validation.
`get_interrupt_nodes() -> tuple[list[str], list[str]]`	Returns (interrupt_before, interrupt_after) node lists.

Compiled Graph Operations

graph = DLGEngine.from_file("config.json")

# Invoke
result = await graph.ainvoke(inputs, config={"configurable": {"thread_id": "t1"}})

# Stream
async for event in graph.astream(inputs, stream_mode="updates"):
    print(event)

# Recursion limit (runtime, NOT compile-time)
result = await graph.ainvoke(inputs, config={"recursion_limit": 50, ...})

# Resume after interrupt
from langgraph.types import Command
result = await graph.ainvoke(Command(resume="approved"), config=config)

Note: recursion_limit is a runtime invocation parameter, not a compile-time setting.