Knowledge Share
Technical articles, tutorials, and insights
Open Source Project #249: Hallmark — A Design Skill That Refuses to Look AI-Generated, Built on 48 Material Themes and a Browser Linter
Hallmark is a design skill from Together AI, open-sourced by Nutlope, for Claude Code, Codex, Cursor and OpenCode. It holds a hard floor (contrast, focus, reduced motion, no invented facts, no eyebrows), deals three themes from a catalog of 48 materials, builds the page around what the visitor came to do, lints the result in a real browser with sloplint, and hands the last word to a fresh-context reviewer. MIT licensed, nearly 38k stars.
Open Source Project #250: Cindy — An Out-of-the-Box Open Source AI Agent That Links Your Computers and Phone, and Brings Claude Code, Codex and Pi Together
Cindy is an open-source desktop and mobile AI agent client (Electron and Expo). It doesn't build its own engine; it puts Claude Code, Codex and Pi in one interface, then adds multi-device handoff, cross-computer model sharing, phone remote desktop, companions and group chat, Orca multi-agent collaboration, and a plugin and Skill ecosystem. Your computer is your server: no rental or self-hosting. Apache-2.0, 7k+ stars; the client is free but model usage is still billed by providers.
Open Source Project #248: CleanYourTV — Let an AI Coding Assistant Debloat Your Android TV Over Wi-Fi and Give It an Apple TV-Style Home
CleanYourTV is an open-source toolkit for debloating Android TV and Google TV. After you enable USB debugging, a coding assistant such as Claude Code, Codex or Gemini CLI backs up the TV over Wi-Fi, disables vendor ads and telemetry, and installs a native launcher of just 523 KB. No root, nothing uninstalled, and a one-line restore. Nine days after launch it has nearly 38k GitHub stars and community-tested lists for 300+ TV models.
Open Source Project #244: HowToLiveBetter — 767 Pieces of Advice, Each With Cost, Payoff, Evidence Grade, and a Primary Source
A Chinese-language life guide on GitHub covering 34 topics — longevity, first aid, saving money, legal red lines, layoffs and work injury, health and social insurance, relationships and parenting, business compliance — in 767 pieces of advice. Each entry states cost, payoff, an evidence grade (A/B/C), and an original source, citing only journal papers and official documents. Ships with a search page, PDF/EPUB/Anki deck, and a skill that lets AI assistants answer from the book. CC BY 4.0, 67k+ Stars.
Open Source Project #242: HyperFrames — Write HTML, Render Video, a Deterministic Video Framework Built for AI Agents
HeyGen's open-source HTML-to-video framework: describe a video with HTML, data attributes, and seekable animation (GSAP and friends); headless Chrome captures frame by frame and FFmpeg encodes, so the same input always yields the same video. Ships 21 agent skills so Claude Code, Codex, and Cursor can produce video from a single prompt. Apache-2.0, 68k+ Stars, used in production at HeyGen.
Open Source Project #203: Cumora — Team Chat Where AI Agents Are First-Class Teammates, Claude Code/Codex as Agent Brains, 3k Stars
Cross-platform team collaboration app where AI agents and humans share the same chat rooms, Kanban board, and calendar. Two agent runtime modes: Cumora Cloud (OpenAI Responses API + K8s pods) or BYOA (run Claude Code/Codex/OpenCode on your own machine). Multi-agent anti-collision coordination: freshness gate, atomic task claiming, small-brain triage. TypeScript, MIT, 3k Stars.
Open Source Project #204: LoopX — Long-Horizon Agent Control Plane Running on Top of Codex/Claude Code, 5k Stars
Open-source, provider-neutral control plane for long-horizon agents. Not an agent framework — a persistent state kernel that runs on top of any agent harness (Codex/Claude Code/OpenCode/etc.): Goals, Todos, Gates, Evidence, Quota, and Recovery. Makes multi-day agent work manageable, reviewable, and continuously improvable. Python, Apache-2.0, 5k Stars.
Open Source Project #190: claude-video — Give Claude Eyes to Watch Videos, One Command to Analyze YouTube/Loom/Local Files, Subtitle-First Zero-Download, Scene-Aware Frame Dedup, Auto Token Budget
Brad Bonanno's Claude Code skill plugin that gives Claude the ability to analyze any video via the /watch command. Seven-step pipeline: yt-dlp download → ffmpeg frame extraction → Whisper transcription → Claude context injection. Subtitle-first optimization (use existing subtitles, skip download entirely), 16×16 thumbnail MAD algorithm for frame deduplication, automatic frame budget scaling by video duration. Four detail modes: transcript/efficient/balanced/token-burner. Works with Claude Code, Codex, Cursor, Copilot, Gemini CLI, and 50+ other agent hosts. 15.2k Stars, MIT.
Open Source Project #191: gstack — YC CEO Garry Tan's Open-Source AI Engineering Team, 23 Expert Role Commands Covering the Full Sprint from Idea to Production
Y Combinator CEO Garry Tan's Claude Code skill set that turns Claude Code into a staffed engineering team. 23 professional role commands covering planning, design, review, testing, and release: /office-hours (YC-style product challenge), /plan-ceo-review, /design-shotgun (4-6 design variants for comparison), /qa (real Playwright browser testing), /cso (OWASP + STRIDE security audit), /ship (sync→test→audit→push→PR). Skills pass context to each other, supports 10-15 concurrent sprints, works across Claude Code/Codex/Cursor and 10 other agents. 128k Stars, MIT.