# Docs by LangChain

> Documentation for LangSmith, Fleet, and our open source packages.

- [AGENT DEVELOPMENT LIFECYCLE (1486 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle.md): Documentation for AGENT DEVELOPMENT LIFECYCLE.
- [PRODUCTS AND SETUP (209 pages)](https://docs.langchain.com/_llms/products-and-setup.md): Documentation for PRODUCTS AND SETUP.

## OpenAPI Specs

- [agent-server-openapi](/langsmith/agent-server-openapi.json)
- [openapi](https://api.host.langchain.com/openapi.json)
- [langsmith-platform-openapi](/langsmith/langsmith-platform-openapi.json)

> The links below point to documentation indexes. Follow each `/_llms/` index recursively until you reach documentation pages.

## Indexes

- [AGENT DEVELOPMENT LIFECYCLE (1486 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle.md): Documentation for AGENT DEVELOPMENT LIFECYCLE.
- [AGENT DEVELOPMENT LIFECYCLE / Build (477 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/build.md): Build agents with open source
- [AGENT DEVELOPMENT LIFECYCLE / Build / Python (242 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/build/python.md): Documentation for AGENT DEVELOPMENT LIFECYCLE / Build / Python.
- [AGENT DEVELOPMENT LIFECYCLE / Build / TypeScript (248 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/build/type-script.md): Documentation for AGENT DEVELOPMENT LIFECYCLE / Build / TypeScript.
- [AGENT DEVELOPMENT LIFECYCLE / Deploy (258 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/deploy.md): Ship agents to production
- [AGENT DEVELOPMENT LIFECYCLE / Deploy / Get started (150 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/deploy/get-started.md): Documentation for AGENT DEVELOPMENT LIFECYCLE / Deploy / Get started.
- [AGENT DEVELOPMENT LIFECYCLE / Monitor (671 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/monitor.md): Trace, debug, and observe agents
- [AGENT DEVELOPMENT LIFECYCLE / Monitor / Reference (570 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/monitor/reference.md): Documentation for AGENT DEVELOPMENT LIFECYCLE / Monitor / Reference.
- [AGENT DEVELOPMENT LIFECYCLE / Monitor / Reference / LangSmith REST API (558 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/monitor/reference/lang-smith-rest-api.md): Documentation for AGENT DEVELOPMENT LIFECYCLE / Monitor / Reference / LangSmith REST API.
- [AGENT DEVELOPMENT LIFECYCLE / Monitor / Reference / LangSmith REST API / Administration (150 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/monitor/reference/lang-smith-rest-api/administration.md): Documentation for AGENT DEVELOPMENT LIFECYCLE / Monitor / Reference / LangSmith REST API / Administration.
- [PRODUCTS AND SETUP (209 pages)](https://docs.langchain.com/_llms/products-and-setup.md): Documentation for PRODUCTS AND SETUP.
- [PRODUCTS AND SETUP / LangSmith setup (144 pages)](https://docs.langchain.com/_llms/products-and-setup/lang-smith-setup.md): Hosting and administration