Top EXTENSION GitHub Repositories & Tools (2026)

Python tool for converting files and office documents to Markdown.

Offline, privacy-first grammar checker. Fast, open-source, Rust-powered

Asynchronous Pi subagents and agent fleet orchestration for parallel coding agents with nested delegation, background work, and supervision in herdr.

This is MCP server for Claude that gives it terminal control, file system search and diff file editing capabilities

A feature-packed Android media downloader. View all native stream formats, download full playlists, manage batch queues, and much more

Archive manager and 7zip replacement for macOS. Preview (nested) archives without extracting them. Extract single files.

Unified framework for robot learning with multi-physics/renderer support

The next-generation ad blocker for Safari. Free and open source on macOS, iOS, iPadOS, and visionOS, with 750,000 rules, userscripts, userstyles, and an element zapper.

Open-source GEO content engineering and multi-site distribution platform with AI quality inspection, illustrated admin help, hosted sites, browser-assisted publishing, and signed updates.

Cross-platform local MCP capabilities for ChatGPT with Chrome integration, Goal, Compact & Resume, and durable multi-agent workflows.

Coverage, security and code quality for coding agents

🕶️ Glassy Music is extension for music player

A fast type checker and language server for Python

A pre-execution guard for AI coding agents. It blocks destructive Git and file system commands, plus common attempts to access sensitive files, before a tool call runs. Supports Amp Code, Antigravity CLI, Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot CLI, Grok Build, Hermes Agent, Kimi Code, OpenClaw, OpenCode, and Pi.

Guardrails for Pi that steer instead of interrupt: enforces your project rules on every write, holds only hard-to-undo actions (3 per 1,000 calls, measured on real sessions), catches unverified "done" claims and stuck loops, and trims tool output. Built on pi-typesafe.

macOS Quick Look extension for Markdown files.

Sync your browser to storage you own. No middleman, no account, no tracking

A programmable tool and agent runtime for Pi

A monorepo of Pi Coding Agent extensions

Better Lyrics for YouTube Music - Enhance YouTube Music with beautiful time-synced lyrics, multilingual support, real-time translations and more ✨