yuval.guide
On this page: What the retrieval half of langchain-core is Index Pinned version: langchain-core==1.6.2 (released 2026-09-04) — the same package as the langchain-core reference ; that page covers the chat and tool types, this one covers the retrieval types. Two extras are needed for the examples: numpy (resolved to …
Read MoreOn this page: What langchain-text-splitters is Index Pinned version: langchain-text-splitters==1.1.2 (released 2026-04-16; it is the version pip resolves beside langchain-core==1.6.2, and its only requirement is langchain-core<2.0.0,>=1.2.31). Everything below was derived by inspecting this exact installed package, …
Read MoreFive pages covering the pieces you actually touch in the LangChain 1.x stack: one per package for building an agent, and two for retrieval. Every entry says what the class or function defines or does, links to the official API page (opens in a new tab), and ends with a runnable example whose printed output was verified …
Read MoreOn this page: What langchain is in 1.x Index Pinned versions: langchain==1.4.0 (released 2026-09-03), which resolved langchain-core==1.6.2, langgraph==1.2.11 and (for the one live example) langchain-anthropic==1.7.1. Everything below was derived by inspecting these exact installed packages, and every offline example …
Read MoreOn this page: What langchain-core is Index Pinned version: langchain-core==1.6.2 (released 2026-09-04). Everything below was derived by inspecting this exact installed package, and every example was executed against it on Python 3.13. Each heading links to reference.langchain.com, which is unversioned and always …
Read MoreOn this page: What langgraph is Index Pinned version: langgraph==1.2.11 (released 2026-08-11; it pulls in langgraph-checkpoint 4.2.0, langgraph-prebuilt 1.1.0 and langgraph-sdk 0.4.4; the SqliteSaver example also needs langgraph-checkpoint-sqlite==3.1.1). Everything below was derived by inspecting this exact installed …
Read MoreYou already know how to clone, branch and merge. This lab adds one more tool: git worktree , which lets a single repository have several working directories checked out at the same time. Why it matters: one working directory can hold only one branch at a time. That is fine for one person doing one task. It breaks the …
Read MoreWatch a packet travel from host to server. Open full screen ↗ recommended on mobile (rotate to landscape) How to read it Each tower is a device, and each square is a layer of the TCP/IP stack (4 layers, not OSI's 7): Physical, Link, Internet, and Transport — applications live above the stack (the dashed boxes) and use …
Read MoreInteractive course Authentication and Secrets — how a request proves who sent it, from a password in a header to a workload that never holds one: Basic auth and sessions, keys and signatures, TLS and certificate chains, mTLS, JWT, OAuth2 and OIDC with Keycloak, and secrets with Vault and AWS. Worked in your own …
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