Indent each line in a string
A comprehensive library for mime-type mapping
micromark utility to handle character codes
Get details about the current Continuous Integration environment
Run multiple promise-returning & async functions with limited concurrency
A tiny (183B to 210B) and fast utility to ascend parent directories
Get the PATH environment variable key cross-platform
Check if argv has a specific flag
[](https://www.npmjs.com/package/@smithy/core) [](https://www.npmjs.com/package/@smithy/core)
A minimal base64 implementation for number arrays.
A [ponyfill](https://ponyfill.com) for `Buffer.from`, uses native implementation if available.
Generate errors that contain a code frame that point to source locations.
A JavaScript implementation of many web standards
Appetite-Driven Context Engineering framework for AI-first development with 2025 design patterns
A tiny (304B to 489B) utility for check for deep equality
Node's event emitter for all engines.
Standard Subresource Integrity library -- parses, serializes, generates, and verifies integrity metadata according to the SRI spec.
Traverse JSON Schema passing each schema object to callback
JSON.parse with context information on error
HTTP server cookie parsing and serialization
Get paths for storing things like data, config, cache, etc
Strip comments from JSON. Lets you use comments in your JSON files!
fast, tiny `queueMicrotask` shim for modern engines
Info about node `exports` field support: version ranges, categories, etc.