@rslint/core

RSLint is a new, fast, and robust JavaScript and TypeScript linter designed to be a modern alternative to existing tools. It addresses the common pain points of slow linting performance and complex configuration that plague many development workflows. By offering a high-performance engine written in Rust, RSLint aims to provide near-instantaneous feedback during development, allowing developers to catch errors and style issues as they type rather than during lengthy build processes.

The core philosophy behind RSLint prioritizes speed, correctness, and a more intuitive developer experience. It targets modern JavaScript and TypeScript projects, including those utilizing newer language features and frameworks. The project is built on the idea that linting should be a seamless part of the development process, not a bottleneck. This makes it particularly appealing to developers who value rapid feedback loops and efficient tooling.

RSLint's architecture leverages a pluggable rule system and a sophisticated AST (Abstract Syntax Tree) traversal mechanism. While specific APIs are not detailed in the provided metadata, its design implies a clear separation between parsing, analysis, and reporting. Developers can expect to interact with configuration files to enable or disable specific rules and customize linting behavior, similar to other established linters, but with an emphasis on performance derived from its Rust core.

Integration points for RSLint typically involve build systems, code editors, and CI/CD pipelines. It is designed to work within common JavaScript and TypeScript development ecosystems. Its categories include "Linting & Formatting" and topics such as "javascript-linter," "linter," and "typescript-linting," indicating compatibility with standard linting workflows and potentially integrating with tools that expect specific output formats.

With a weekly download count of 23.1K and 429 GitHub stars, RSLint shows growing adoption and community interest. Its unpacked size is 2.3 MB, with a gzipped bundle size of 88.5 kB, indicating a relatively moderate footprint for its capabilities. As of its last update in 2026-07-29, the project has 54 open issues, suggesting active development and areas for community contribution or potential stabilization.

Developers should be aware that RSLint, while rapidly developing, may still be maturing compared to more established linting solutions. The presence of 54 open issues indicates ongoing development and potential for undiscovered bugs or missing features. While its core functionality is robust, some niche configurations or less common JavaScript/TypeScript patterns might not yet be fully supported or might require specific rule configurations.