Dev Tools Directory

Mediabunny

TypeScript library for reading, writing, and converting media files directly in the browser — like FFmpeg, but for the web. Zero dependencies, tree-shakable, and hardware-accelerated via the WebCodecs API.

deepsec

AI-powered vulnerability scanner that uses coding agents to perform deep security analysis of codebases — regex-based candidate matching followed by LLM-driven investigation, with support for distributed execution and PR diff review.

npm-deps-cleanup

AI agent skill that audits and reduces JavaScript package dependency footprint — removes unused deps, deduplicates workspace versions, analyzes transitive closures, and applies e18e replacement recommendations. Works with npm, pnpm, Yarn, and Bun.

How We Test TanStack AI Across 7 Providers

How TanStack AI runs 137 deterministic tests across 7 LLM providers in ~2 minutes on every PR using a mock server instead of real API calls.

Accept Markdown

Protocol and implementation guide for serving Markdown to AI agents via HTTP content negotiation — same URL delivers HTML to browsers, Markdown to AI.

Is It Agent Ready?

Scanner that evaluates website compliance with AI agent standards — checks robots.txt, Markdown negotiation, MCP servers, OAuth, and agent protocols.

noqa

AI-powered QA platform that automates mobile app testing with visual AI agents — write tests in plain language, run across iOS and Android on 1000+ real devices.

SEO Lens

Chrome extension that audits SEO metadata on any webpage with instant scoring, structured data validation, and AI-friendly copyable reports for Claude Code and Cursor.

Pullfrog

AI PR review agent from Zod's creator. Dynamically scales effort, uses subagent swarms for large PRs, and runs inside GitHub Actions with batteries-included MCP tools.

Executor

Open-source tool gateway for agents from Rhys Sullivan. Normalizes MCP, OpenAPI, GraphQL, and custom sources into one typed SDK that agents call in a sandbox — built on Cloudflare's Code Mode pattern.

Browser Use

Open-source browser automation harness that lets AI agents navigate and interact with websites at scale.

Effect Institute

Interactive online learning platform with narrated video tutorials for the Effect-TS library.

Effect Solutions

Prescriptive guide and reference for writing idiomatic Effect-TS programs with setup, patterns, and ecosystem docs.

Effect

TypeScript library for building robust apps with typed errors, structured concurrency, retries, and first-class OpenTelemetry observability.

Exa

Search API built for AI agents, returning fast, high-quality web results with structured content extraction.

Fallow

CLI tool that analyzes TypeScript and JavaScript codebases to find unused exports, dead code, and complexity hotspots.

Firecrawl

Web crawling and scraping API that converts any website into LLM-ready markdown or structured JSON.

Google CheckMX

Google Apps Toolbox utility that checks MX, SPF, and DKIM DNS records to diagnose email delivery configuration issues.

GPTZero

AI content detection platform that identifies text generated by ChatGPT, Claude, Gemini, and other LLMs.

Inkless

Free e-signature platform for uploading, signing, and sending unlimited documents without a subscription.

Langfuse

Open-source LLM engineering platform for tracing, prompt management, evaluations, and production monitoring.

Lighthouse HQ

Immigration platform that guides international professionals through U.S. visa applications with document prep and expert support.

Models.dev

Open-source database of AI model specs, pricing, and capabilities queryable via a JSON API.

OpenPhone

Business phone system that provides virtual numbers, shared calling, and texting for teams in one app.

Perplexity API

API platform providing real-time web search and grounded LLM responses with citations via Sonar models.

React Doctor

Static analysis tool that evaluates React codebases across security, performance, correctness, and architecture, producing a health score with diagnostics.

Resend

Developer-first email API for sending transactional and marketing email, with multi-language SDKs, a CLI, and React Email templating.

ScrapingBee

Web scraping API that handles headless Chrome rendering, proxy rotation, and anti-bot bypassing automatically.

Stagehand

Open-source SDK for building browser agents using natural language instructions instead of brittle selectors.

Ultracite

Zero-config preset that wires up linters, formatters, editor settings, and AI-agent rule files for JavaScript and TypeScript projects.

Unipile

Unified API for reading and sending messages across LinkedIn, email, WhatsApp, Telegram, and calendars.

agent-eval

Testing framework for measuring how well AI coding agents perform against your framework or configuration.

emulate

Local API emulator that provides stateful, production-fidelity stubs for services like GitHub, Google, and Slack.

portless

Replaces localhost port numbers with stable named URLs and enables HTTPS and HTTP/2 for local dev servers.

VERT

Free, privacy-first file converter that runs entirely in the browser using WebAssembly. Supports images, videos, audio, documents, and more with no uploads required.

Zenblog

Headless CMS with a Notion-style editor, hosted media uploads, and a type-safe API client for developer-managed blogs.