Use when writing, refactoring, reviewing, or testing ANY Node.js code. The canonical reference for Node conventions — project taxonomy (Node Web Only), project layout, modern Node idioms (pure ESM, node: builtins, target Node >=24, top-level await, node:test, structuredClone, AbortController), edge-
Use when writing, refactoring, reviewing, or testing ANY Node.js code. The canonical reference for Node conventions — project taxonomy (Node Web Only), project layout, modern Node idioms (pure ESM, node: builtins, target Node >=24, top-level await, node:test, structuredClone, AbortController), edge-case-driven unit testing with node:test, core principles, dependency selection, console logging, and