How To Use Langchain
📖 Bu rehber ToolPazar ekibi tarafından hazırlanmıştır. Tüm araçlarımız ücretsiz ve reklamsızdır.
What it is
LangChain is MIT-licensed and maintained by LangChain Inc. (Harrison Chase and team). In 2024 it split into langchain-core (Runnables and interfaces), langchain (high-level chains), partner packages like langchain-openai and langchain-anthropic, and langchain-community for third-party integrations. JavaScript lives in a separate monorepo with equivalent modules.
Install
A three-step LCEL chain that answers a question with structured output:
First run
LangChain’s surface area is enormous and documentation lags behind code. Pin versions, read the source when docs conflict, and avoid deeply nested chains you cannot trace. A 5-line chain you understand beats a 50-line chain you copied from a tutorial.
Everyday workflows
Production caveats matter: many community integrations are community-maintained, meaning patchy reliability. Wrap external tools with retries, timeouts, and circuit breakers; never trust a retriever to return within SLA without measuring it first.
Gotchas and tips
Teams that want the broadest integration ecosystem and are willing to pay the complexity tax. Tip: LangSmith tracing is the single biggest quality-of-life upgrade — turn it on before you write your second chain.