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Projects

Side products I run myself, created and optimized with AI tools.

El Mercado

  • Prediction market
  • 2026
  • Claude Code
  • Next.js
  • Node.js
  • Postgres
  • Vercel
  • Fly.io
  • AI news watcher

Role: Founder

El Mercado is a prediction market for Paraguay, modelled after Kalshi. It's a free platform with virtual currency, and monthly prizes for the top 10.

The mini brand book.
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The productHow it works

Flow: sign up and get virtual guaraníes, pick a side on football, politics, weather, the dollar or Bitcoin, a right call pays, the top 10 each month win real prizes
How it works.
The lobby.

80 sessionsBuilt with Claude Code

  • Every feature started as a written spec, 52 in total.
  • Rules and lessons from past mistakes load at the start of each session.
  • Every page gets checked in a real browser before it ships.
Next.jsfront end, on Vercel
Node APIon Fly.io, São Paulo
Postgreson Neon
Clerkaccounts
Resendemail
Claude Codethe engineering team
Launch reel.

24 hours a dayIt runs itself

18 background jobs open the markets, price them, resolve them and pay out.

Flow: fixtures, weather stations, the dollar and Bitcoin windows feed 18 background jobs that open, price, resolve and pay out; a house account keeps offers; 26,000+ markets resolved
Jobs workflow
A five-minute Bitcoin window closes and resolves.

Every morningAI watches the board

Every morning an internal AI model reads the news and emails me when one of them has already happened.

Flow: markets with no feed, the watcher, Tavily, Gemini, then a yes with a quote emails me and I decide; a no leaves a receipt
AI watcher workflow.
Email from the watcher: the quote and the source
Watcher email example.

6 monthsResults

26,000+markets resolved with no manual work
623commits
80working sessions with Claude Code
18scheduled jobs
52written specs
97test files

The product works and pays out on its own. A semi-autonomous model.

Matiklava Goes Partying

  • Weekly newsletter
  • 2026
  • Claude Code
  • Python
  • Web crawling
  • LLM extraction
  • Cloudflare Workers
  • Telegram bots
  • MailerLite

Role: Founder, editor and builder

Matiklava Goes Partying is a weekly guide to underground parties in Taiwan, started in August 2024 for 30 people. Every issue used to take three to four hours of copying flyers into MailerLite. In April 2026 I rebuilt it using Claude Code.

The mini brand book.
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Issue 27 of the newsletter, top of the email
Email example.

April 2026Pipeline

A script reads 55 Instagram accounts and Resident Advisor, checks the dates and links, writes a draft issue, and ask for manual review.

Diagram: how an issue gets made, six steps and the tools underneath
Workflow diagram.

Every weekAI-assisted direction

  • "Let's start issue #27."

  • It asks me eight questions about the current issue.

  • It builds the issue and checks it against the original posts.

  • It hands it to me to read.

  • Every correction I make becomes a rule, so the same mistake doesn't come back.

Pythonthe pipeline
Instagram + RA55 accounts, cross-checked
LLMcaption and flyer to event
MailerLitedrafts and sending
Cloudinaryflyers that never expire
Cloudflare Workersboth Telegram bots

Around the emailArchive

archive.matiklava.com, optimized SEO and GEO for search engines and LLMs.

The archive index.

Two Telegram bots

Both on Cloudflare Workers: one reports to me, one serves readers.

Flow: a pipeline step finishes, the operator bot reports to my phone; an issue goes out, @MGPguideBot pings its subscribers
Bots flow diagram.
The reader bot.
Telegram chat with the operator bot: scrape, cross-check, generate and link-check reports
The operator bot.
Operator bot commands.
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Growth and partners

Everything else runs off the same data:

Subscribe pagetracks which ad, post or bot brought each reader
Meta adssubscribers at NT$7 per lead
Partners pagesells placements, live numbers
Click reportwhat people opened, after each send
Trends reportgrowth and open rate across issues
Instagram carouselfive slides from each issue

Subscribe page
Subscribe page.
Partners page with live subscriber count and open rate
Partners page.
Click report for issue 22
Click report.
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Instagram carousel, slide 1
Instagram carousel.
Instagram carousel, slide 2
Instagram carousel, slide 3
Instagram carousel, slide 4
Instagram carousel, slide 5
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27 issuesResults

794subscribers (30 at issue 1)
52%average open rate, twice the 25% benchmark
67.5%best open rate
19issues in six months since the relaunch
NT$7per subscriber lead from Meta ads
19Klines of code, built solo with Claude Code

bpad

  • Notepad app
  • 2026
  • Claude Code
  • Next.js
  • TypeScript
  • TipTap
  • Postgres
  • PartyKit
  • Realtime

Role: Design and build

bpad is a notepad for whatever: briefs, plans, lyrics. Rich text, cloud sync, live collaboration and comments, with a look that doesn't feel like a productivity tool.

The mini brand book.
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Quick demo.

LiveReal-time collaboration

Invite by username or send a link with view or edit rights. Edits show up on the other side as you type, with a named cursor.

Flow: you type, saved in the browser, saved to the database, collaborator's screen; a dropped connection loses nothing and a version counter keeps stale saves from winning
Sync workflow.
A collaborator typing, seen from the owner's screen.

ShareLinks, QR codes and invites

  • Send a view link or an edit link, each with a QR code.

  • No account needed on the other side.

  • Links can be turned off.

  • Anyone who opens a private note can ask the owner for access.

Share modal: two links, QR, direct invites
Share modal,
Public view of a note through a view link
Public view.
Request access screen on a private note
No access screen.
Access request in the owner's notifications
Access request notification.
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CommentsThreads on comments

  • Select and comment on any content.

  • Or mention someone with @.

  • Replies stay under the comment.

  • Every mention shows up in the notification bell right away.

A comment with a mention.
Notifications: opened, mentioned, requests
Notification bell.
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StackHow it's built

Next.js 14the app
TipTapthe editor
Clerkaccounts
Prisma + Postgresdata
Vercel Blobimages
PartyKitlive rooms

Export to PDF keeps the design. Markdown, DOCX and plain text are there too. Two weeks, 217 commits.

15Klines of TypeScript
22API routes
12custom editor extensions
6themes
4export formats
14days

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