---
title: "Week 1 — March 2026"
url: https://memory.wiki/ycd19kks
updated: 2026-05-04T22:07:01.739Z
hub: https://memory.wiki/hub/yc-demo
bundle_count: 1
concept_count: 12
source: "memory.wiki"
---
# Week 1 — March 2026

## Built
- Project setup, Next.js + Supabase + Rust WASM engine
- WYSIWYG editor v0
- Permanent URLs

## Learned
- Tiptap > raw contentEditable for WYSIWYG. ProseMirror foundation matters.
- Comrak (Rust) compiles to WASM in ~2ms. Faster than I expected.

## Stuck on
- Mermaid theme switching with dark mode
- Tab persistence across browser restarts

## Next week
- Sharing UX
- Multi-surface (Chrome ext start)


---

## Concepts in this document
- **Chrome extension** _(concept)_
  Planned multi-surface expansion to reach users in additional browser contexts.
- **Rust + WASM** _(entity)_
  Performance-critical core engine compiled to WebAssembly and native binaries, enabling fast parsing and rendering across browser and desktop environments.
- **Claude Sonnet 4.5** _(entity)_
  AI model delivering surprisingly high-quality bundle generation results.
- **semantic search** _(tag)_
  Primary application use case for text-embedding-3-small in production systems.
- **pgvector** _(entity)_
  Vector storage technology used by mdfy for managing 1536-dimensional embeddings.
- **Supabase** _(entity)_
  Backend infrastructure providing PostgreSQL database, authentication, real-time sync via Yjs CRDT, and serverless functions.
- **VS Code** _(entity)_
  Microsoft's code editor that mdfy integrates with through an extension.
- **WYSIWYG editor** _(concept)_
  Primary feature being built; v0 milestone reached with architectural decisions around implementation approach.
- **Next.js** _(entity)_
  Framework powering the main web application at mdfy.app.
- **MCP Server** _(entity)_
  Integration point providing 25 tools that connect mdfy.app to external AI and productivity applications via standard protocol.
- **Tiptap** _(entity)_
  ProseMirror wrapper selected as superior alternative to raw contentEditable for editor implementation.
- **Permanent URLs** _(concept)_
  Core feature implemented to enable persistence and shareability of edited content.

## Concept relations (within this doc's concepts)
- **semantic search** implemented via **pgvector**
- **WYSIWYG editor** built with **Tiptap**
- **Chrome extension** extends to **WYSIWYG editor**

## Bundles containing this document
- [Weekly Reviews — March 2026](https://memory.wiki/b/ycb03Bus)
  > Week-by-week build log, weeks 1-5. Built, learned, stuck-on, next-week. Shows the velocity from setup to v6 pre-launch.

_Hub canonical:_ https://memory.wiki/hub/yc-demo
_Concept digest:_ https://memory.wiki/raw/hub/yc-demo?digest=1&compact=1