[KongchangAI]
Concept

Functional API

A functional-style API paradigm provided by LangGraph that organizes agent logic through concise function calls. Together with the Graph API, it constitutes one of the two core programming paradigms in LangGraph.

Timeline (last 90 days)

Oct 21

The return value of a @task in the Functional API is recorded in the checkpoint; when resuming at the entry point, calls to already-completed tasks directly return the result from the checkpoint and skip the actual computation.

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Sep 11

Functional API provides a more functional style of writing and exists as a complementary option.

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