Fast, disk space efficient package manager

Left pad a string with zeros or a specified string. Fastest implementation.

Fastest stable deterministic JSON.stringify()

TypeScript definitions for benchmark

MCP server for the PipelineScore LLM benchmark — exposes run_benchmark / get_user_leaderboard / get_user_profile tools to any MCP-compatible client (Claude Code, Codex, Cursor, Continue, Cline). Lets your AI drive local-first LLM benchmarking on your hard

Pure node.js library for comparing PNG-images, taking into account human color perception.

A tool set for CSS: fast detailed parser (CSS → AST), walker (AST traversal), generator (AST → CSS) and lexer (validation and matching) based on specs and browser implementations

Node.js atomic and non-atomic counters, rate limiting tools, protection from DoS and brute-force attacks at scale

Generic VM-based structure matching framework

Local-first agent memory with MCP and an agent-native CLI. Documented clients include Claude Code, Cursor, and Windsurf.

Fast and spec-compliant printf implementation for Node.js and browser.

HyperFrames CLI — create, preview, and render HTML video compositions

Reuse objects and functions with style

Freeze the model, evolve the harness. Two measured applications: (1) SWE-bench code-repair — conformant GLM->Opus empty-patch cascade resolves 51.3% Lite (n=300) and 55.6% Verified (278/500, Wilson 95% CI [51.2, 59.9], official swebench gold eval, no gold

A Node.js benchmarking library with support for multithreading and TurboFan optimization isolation.

Crazy fast http radix based router

Display language model outputs in your React project.

Benchmark harness.

Collection of ~170 lightweight, composable transducers, reducers, generators, iterators for functional data transformations

Provider-agnostic LLM access runtime SDK for Sentropic.