Forkcast Weekly #19: ECC, agent-skills, claude-code, OpenSpec, cua, Agent-Reach, BrowserSkill

Episode Summary#

Episode 19 covers 30 trending open-source projects from this week including a 263K-star agent harness performance optimizer, Addy Osmani’s 97K-star production-grade engineering skills for AI coding agents, Anthropic’s 147K-star terminal-native agentic coding tool, and a spec-driven development framework for AI assistants. Also featured are Colibri, a pure C engine running 744B parameter models on 25GB RAM, Cloudflare’s multi-phase security audit skill, the NSA’s Ghidra reverse engineering framework, and an open-source voice studio with cloning in 646 languages.

Repositories Covered#

ECC#

Agent harness performance optimization system with skills, instincts, memory, and security modules. Works with Claude Code, Codex, OpenCode, Cursor. 263K stars, 40.9K forks. MIT license.

agent-skills#

Production-grade engineering skills for AI coding agents by Addy Osmani. Covers code review, performance, accessibility, testing, security. Works with Claude Code, Codex, Cursor, Antigravity. 97.3K stars, MIT license.

claude-code#

Anthropic’s terminal-native agentic coding tool. Understands full codebase, executes tasks autonomously, handles git workflows. 147K stars, 862 commits, 24K forks.

OpenSpec#

Spec-driven development framework for AI coding assistants. Gives agents structured specifications to produce consistent, tested code. 69.6K stars, 4.8K forks.

cua#

Open-source computer-use drivers for cross-OS agent fleets with training, evaluation, and data generation benchmarks. Rust core with Python bindings. 24.7K stars.

Agent-Reach#

CLI tool giving AI agents access to Twitter, Reddit, YouTube, GitHub, Bilibili, and XiaoHongShu with zero API fees. 83.6K stars, Python.

BrowserSkill#

CLI and browser extension from Tencent that lets AI agents control your real logged-in browser without interrupting your work. 5.9K stars.

knowledge-work-plugins#

Official Anthropic open-source plugins for Claude Cowork targeting knowledge worker workflows. 25.2K stars.

oh-my-hermes#

All-in-one plugin collection for Hermes Agent with long-term memory, model-optimized workflows, and coding intelligence. 2.8K stars.

YuE#

YuE2 frontier music generation with symbolic planning, zero-shot covers, and agentic music editing. Competitive with Suno v5/v6. 9.8K stars, Python.

coder#

Terraform-provisioned secure development environments for developers and AI agents. Supports VS Code, JetBrains, SSH. 15.8K stars, Go, AGPL-3.0.

higgsfield#

Fault-tolerant GPU orchestration for training models with billions to trillions of parameters. Handles node failures gracefully. 5.1K stars, Python.

ever-gauzy#

Open business management platform combining ERP, CRM, HRM, ATS, PM. Self-hostable with Docker. 7.8K stars, 27K commits, TypeScript, AGPL-3.0.

OpenStock#

Open-source stock market platform with real-time price tracking, personalized alerts, and company insights. Forever free. 16.3K stars.

open-code-review#

Alibaba’s hybrid code review tool combining deterministic pipelines with LLM agents. Built-in ruleset for NPE, XSS, SQL injection. 38K stars, Apache 2.0.

security-audit-skill#

Cloudflare’s 6-phase security audit skill for coding agents with coverage-led hunting, candidate validation, and independent verification. 17K stars, MIT.

ghidra#

NSA’s software reverse engineering framework for disassembly, decompilation, and analysis across x86, ARM, MIPS. 79.1K stars, Apache 2.0.

colibri#

Pure C inference engine running GLM-5.2 (744B MoE) on 25GB RAM by streaming expert weights from disk. Zero dependencies, CUDA/Metal/Vulkan/CPU. 36.5K stars.

VoiceStudio#

Fully local ElevenLabs alternative with voice cloning, voice design, video dubbing, transcription, audiobook creation in 646 languages. Tauri desktop app. 33.3K stars.

voicebox#

Open-source AI voice studio for cloning, dictation, and creation. 55.2K stars, local-first.

tinycast#

Fully native macOS launcher, hotkeys, and clipboard history written in Swift. Tiny footprint. 6.7K stars.

BrewUI#

Homebrew’s official macOS GUI in Swift. Visual package management for the most popular macOS package manager. 2.1K stars.

anki#

Smart spaced repetition flashcard program with optimized review intervals. Rust + Python, cross-platform, sync server, extensible. 31.3K stars.

DeskcommCRM#

Self-hosted AI sales OS with native AI agents and WhatsApp via WAHA. MCP-ready, multi-tenant, LGPD compliant. Next.js + Supabase. 3.3K stars, MIT.

MiroFish#

Universal swarm intelligence engine for prediction across any domain. Collective intelligence from multiple simple agents. 74K stars, Python.

system_prompts_leaks#

Extracted system prompts from Claude, ChatGPT, Gemini, Grok, Cursor, Kimi, DeepSeek. Updated regularly. 67.7K stars.

docling#

Document conversion pipeline for generative AI. Handles complex layouts in PDF, DOCX, PPTX, HTML. 67.2K stars, Python.

OpenResearch#

Local-first research workspace with Rust core, SQLite store, ArXiv integration, macOS app. 5.4K stars, MIT license.

Octop#

Multi-user, multi-agent self-hosted AI assistant from Tencent. 4.3K stars.

vphone-cli#

CLI tool for running iOS virtual machines on macOS using Apple’s Virtualization framework. iOS 17-27 beta, firmware patching, MCP server. 14K stars.

Watch#

• Video: https://www.youtube.com/watch?v=PENDING_UPLOAD
• Cover: https://i.ytimg.com/vi/PENDING_UPLOAD/hqdefault.jpg

Notes#

Transcript and notes will be added from Forkcast output artifacts.