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Serafin Sanchez

All Projects

A collection of my work, experiments, and contributions. Currently featuring 14 projects.

Speedup β€” a Mac app for speeding up long videos preview
A Mac app for speeding up the slow parts of a long video. Mark the dead stretches, pick a speed for each, and export an H.264 .mp4. It runs locally and nothing gets uploaded.
Swift 6
SwiftUI
AVFoundation
macOS
Next.js
bootsncats β€” a step sequencer you describe in plain English preview
A drum machine you build by describing the beat β€” "house beat at 124 with a tom fill at the end." Tweak it on a step grid, then export MIDI, a full mix, or stems. It runs in the browser and your samples stay on your machine.
Next.js
React
TypeScript
Gemini
Web Audio API
Developer Portfolio with Next.js 14, MDX, and shadcn/ui preview
A modern, responsive developer portfolio built with Next.js 14, featuring MDX content management, dark mode, and a clean design system.
React
Next.js
TypeScript
Tailwind CSS
MDX
Assembly Required β€” plain-language coverage of the Colorado legislature preview
A free, nonpartisan news site that tracks every bill in Colorado’s 2026 legislative session β€” plain-English summaries, daily status updates, and business-opportunity analysis β€” written by a 15-agent AI newsroom and published as a weekly newsletter.
Next.js 16
React 19
InstantDB
Claude Agent SDK
AI Agents
SEO/AEO
Copydesk β€” an AI newsroom that writes your newsletter preview
Copydesk produces your weekly newsletter for you. Fifteen AI agents pull from your sources, decide what is worth covering, write it in your voice, edit it, and render a finished HTML email. You review it and hit send.
Next.js 16
React 19
Claude Agent SDK
InstantDB
AI Agents
MCP
E-Commerce Platform with Next.js 15 and Role-Based Access Control preview
A sophisticated B2B/B2C e-commerce platform for a 50+ year family-owned manufacturer of custom metal products, featuring role-based pricing, custom orders, and vendor management.
Next.js
Supabase
TypeScript
E-commerce
Authentication
Audio Stem Extraction with Next.js, Supabase, and FFmpeg preview
A modern web app for musicians and producers to extract audio stems, manage credits, and process payments, all in a secure, scalable environment.
Next.js
React
Supabase
FFmpeg
Stripe
AI
Agent Workflow Kit β€” files I drop into every project to keep coding agents on task preview
An open-source kit β€” a CLAUDE.md, a few skills and subagents, and a backlog format β€” that keeps AI coding agents on task, plus the site and 15-chapter manual that ship it.
Next.js 16
React 19
Neon Postgres
Drizzle
AI Agents
Open Source
macOS Menu Bar App for Miro Sticky Notes with Swift and SwiftUI preview
A native macOS menu bar app for instantly converting copied text into Miro sticky notes, streamlining workshops and brainstorming.
Swift
SwiftUI
AppKit
macOS
Productivity
Hyvemind β€” Live polling that hears every student preview
A live polling app for the classroom. Ask a question, students join by link or QR with no account, and answers land in real time β€” so you hear from everyone, not just the loud ones. Formerly Cognivote.
Next.js 15
React 19
InstantDB
Real-time
AI
Polling
Directory Platform with Next.js 14, PostgreSQL, and Leaflet Maps preview
A directory website to connect people with specialized cleaners in their area, featuring business search, ratings, and a responsive, accessible UI.
Next.js 14
React
TypeScript
PostgreSQL
Tailwind CSS
QR Form System with Next.js 14, InstantDB, and BigCommerce Widgets preview
A sophisticated post-purchase feedback collection system with embeddable widgets for e-commerce integration, featuring real-time data collection, photo uploads, and seamless BigCommerce embedding.
Next.js
InstantDB
Embeddable Widgets
TypeScript
Tailwind CSS
Audio Transcriber with Python, Streamlit, and AssemblyAI preview
A web app for fast, accurate multi-language audio transcription and translation, featuring speaker diarization, custom speaker naming, and instant subtitle export.
Python
Streamlit
AssemblyAI
Google Cloud Translate
AI
Music Source Separation CLI with Python, PyTorch, and Batch Processing preview
I modified and extended an open-source tool for music source separation, enabling users to split audio tracks into stems from folders of audio files using a CLI. Widely used by musicians, producers, and researchers.
Python
PyTorch
AI
Audio Processing
Open Source