Marc

Building Kumiko — an open-source SaaS framework for Bun/Hono with multi-tenancy, auth, billing & GDPR built in. Also shipping CashColt (mortgage planning) and publicstatus.

Joined on Jun 24, 2026 https://kumiko.rocks

Marc

Aug 6

You asked how I know what the model did. Here are the answers, with numbers.

#ai #llm #monitoring #performance

6 min read

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Marc

Aug 3

Multi-Tenant AI Chat: From Hardcoded Config to BYOK in 4 Steps

#ai #multitenancy #typescript #prisma

4 min read

Marc

Aug 1

We Cut Our AI Pipeline Costs 25% Without Losing Accuracy (and the fix wasn't a cheaper model)

#ai #typescript #llm #architecture

3 min read

Marc

Aug 1

We Shipped a Mortgage Calculator Bug Where Every Test Was Green and the Answer Was Still Wrong

#bug #debugging #softwareengineering #testing

3 min read

Marc

Jul 1

Your event store is already your audit log

#eventsourcing #postgres #architecture #backend

3 min read

Marc

Jun 28

How do you prevent AI-generated code from drifting away from your conventions over time?

#ai #webdev

1 min read

Marc

Jun 24

Multi-Tenancy in Bun/Hono Without Boilerplate

#architecture #database #saas #typescript

2 min read

DEV Community

Marc

Badges

Writing Debut

You asked how I know what the model did. Here are the answers, with numbers.

Want to connect with Marc?

Multi-Tenant AI Chat: From Hardcoded Config to BYOK in 4 Steps

We Cut Our AI Pipeline Costs 25% Without Losing Accuracy (and the fix wasn't a cheaper model)

We Shipped a Mortgage Calculator Bug Where Every Test Was Green and the Answer Was Still Wrong

Your event store is already your audit log

How do you prevent AI-generated code from drifting away from your conventions over time?

Multi-Tenancy in Bun/Hono Without Boilerplate