# Docs by LangChain > Documentation for LangSmith, Fleet, and our open source packages. - [AGENT DEVELOPMENT LIFECYCLE (1481 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle.md): Documentation for AGENT DEVELOPMENT LIFECYCLE. - [PRODUCTS AND SETUP (197 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 (1481 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle.md): Documentation for AGENT DEVELOPMENT LIFECYCLE. - [AGENT DEVELOPMENT LIFECYCLE / Build (475 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/build.md): Build agents with open source - [AGENT DEVELOPMENT LIFECYCLE / Build / Python (241 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/build/python.md): Documentation for AGENT DEVELOPMENT LIFECYCLE / Build / Python. - [AGENT DEVELOPMENT LIFECYCLE / Build / TypeScript (247 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/build/type-script.md): Documentation for AGENT DEVELOPMENT LIFECYCLE / Build / TypeScript. - [AGENT DEVELOPMENT LIFECYCLE / Deploy (256 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 (670 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/monitor.md): Trace, debug, and observe agents - [AGENT DEVELOPMENT LIFECYCLE / Monitor / Reference (569 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 (557 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 (197 pages)](https://docs.langchain.com/_llms/products-and-setup.md): Documentation for PRODUCTS AND SETUP. - [PRODUCTS AND SETUP / LangSmith setup (132 pages)](https://docs.langchain.com/_llms/products-and-setup/lang-smith-setup.md): Hosting and administration