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Things I have already built.

A few tools I built for my own work. Each link opens its Gumroad listing for payment and download.

Looking for something still in progress instead? That is Labs.

  1. Obsidian vault

    Second Brain OS

    An Obsidian vault built for working with an AI, not just for browsing it. A per-fact memory store, session handoffs, and the briefing prompt that ties it together.

    Obsidian vaultA$29

    The Second Brain OS template vault open in Obsidian: per-fact memory store, project scaffolding, handoff and review folders in the file tree, with the START-HERE briefing note open.
  2. Pattern library

    Supabase RLS Pattern Library

    18 drop-in Row Level Security patterns for Supabase, including the eight specific cases where Claude, ChatGPT and Copilot generate policies that look right and are not.

    Pattern libraryA$49

    The Supabase RLS Pattern Library: all 18 pattern files listed by folder, with the update-without-WITH-CHECK pattern open showing the wrong AI-generated policy and the corrected version.

Both links open emsdenstudio.gumroad.com in a new tab. Gumroad handles payment, receipts and downloads.