Open source. Open possibilities.

Ditto scans JavaScript/TypeScript repositories with ts-morph, fingerprints each function through an LLM, clusters behavioural duplicates by embedding, then executes pure functions in a sandbox to show where they diverge.

Puppeteer is a JavaScript library providing a high-level API to control Chrome or Firefox browsers via the DevTools Protocol or WebDriver BiDi.

An open-source AI coding assistant platform with workspace-aware analysis, GitHub integration, team collaboration, a capability-based plugin system, and read-only Stellar/Soroban developer tooling including contract inspection, XDR decoding, and project detection.

High-performance code intelligence MCP server that indexes codebases into a persistent knowledge graph for AI coding agents. Supports 162 languages via tree-sitter, sub-millisecond structural queries, 15 MCP tools, and ships as a single native binary with no runtime dependencies.

Assura is a Rust command-line tool that validates repository structure, naming, file, section and Markdown conventions against a single local policy, giving fast advisory review, repairable feedback for AI coding agents, and a check gate before merge.

Lighthouse is an open-source tool for auditing web apps and pages to collect modern performance metrics and insights on developer best practices.

Divebell is an extensible web development and debugging toolkit for coding agents. It connects page context, browser capabilities, and existing development tools, enabling agents to reproduce, diagnose, and verify web application issues directly in real scenarios via a CLI and extensions.

Karate is an open-source test automation framework that unifies API testing, mocks, performance testing, and UI automation into a single tool.

CoalLedger is a docs-health checking suite for AI coding agents — the documentation counterpart to CoalMine's code canaries. Seven canaries flag wrong, incomplete, stale, contradictory, broken, unreadable and (optionally) leaked documentation, with a bundled zero-dependency CommonMark+GFM AST engine, context-judged severity and choice-gated fixes.

ECC is an agent harness operating system that provides a coordinated engineering system and toolbox for AI agents, enabling structured workflows like planning, testing, and reviewing.

LogSquirl is a fast, open-source log explorer for Windows, macOS, and Linux. Search multi-gigabyte files, follow live logs, and chart patterns. Built with Qt6/C++, it's a fork of klogg and glogg.

Phronesis is a RETE rules engine that enforces project conventions for LLM agents outside the context window, preventing contextual drift in long sessions.

Peaky Peek is a local-first, open-source audit and trust console for AI agents. It captures causal chains, verifies claims deterministically, and produces explainable trust scores with failure narratives — all running on your machine.

SessionReplaySDK is a privacy-focused iOS SDK for recording user sessions. It captures video, touch events, logs, and network requests with automatic PII masking, supporting SwiftUI/UIKit and local-first storage.

SWE-agent is an autonomous AI agent that uses language models to automatically fix GitHub issues, find cybersecurity vulnerabilities, and solve custom coding challenges. Built by Princeton and Stanford researchers.

ripr is a static mutation-exposure analysis tool that identifies changed behavior your tests reach but don't actually verify, without running mutation testing.

A curated library of machine-readable task prompts and Agent Skills for coding agents, focusing on common agent failures like broken setup scripts, vague issues, and tests requiring unavailable services. Includes fixtures with planted defects for validation.

Harper is an offline, privacy-first English grammar checker built in Rust. It lints documents in milliseconds with a tiny memory footprint, unlike cloud-based or resource-heavy alternatives.

VibeCoder is an automated GitHub issue worker that monitors repositories, picks up issues, writes code using AI agents (Claude, Codex, Gemini), runs quality checks, and opens pull requests. It supports review feedback loops, self-healing, and cost optimization.

RecurSpec is a Node.js command-line testing tool that checks whether the recovery instructions in error messages actually resolve the original failure, running each case in an isolated temporary workspace and blocking unsafe commands.