Kind-of-Lost

What Is a Remark Code on Your Credit Report?

People send me screenshots all the time. Half are tradeline questions, but the other half are things someone spotted on Credit Karma and couldn’t decode — and lately the one that keeps landing in my inbox is a little notation called a remark code on a credit report. It looks official, it shows up with no explanation, and the bureau never bothers to tell you what it actually means.

So here is the plain-English version. A remark code isn’t a score and it isn’t a penalty (though it sure can feel like one when it appears out of nowhere). It’s a short label attached to one of your accounts, and once you know how to read it, most of the mystery goes away.

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Three Bugs That Would Have Stayed Hidden in Excel

When you convert an optimization model from Excel to standalone Python, you expect to do some work. You expect to rewrite the data loading, restructure the variable definitions, test the output. What you don’t expect is for the model to fail in three distinct ways, each one caused by something the Excel version was handling silently without you knowing it.

Handling PuLP solver errors in a Python optimization model

That’s what happened here. Three bugs. All real. All the kind that would have stayed invisible forever if the model had stayed in the spreadsheet.

PuLP, MILP, and CBC: The Alphabet Soup Behind Your Schedule

PuLP is a Python library for writing optimization models. MILP stands for Mixed Integer Linear Program. CBC is an open-source solver. Together, they’re what makes the Staff Scheduler work — and together, they represent something I find genuinely interesting: the fact that problems that used to require expensive commercial software and specialized hardware can now be solved on a laptop, for free, in a few seconds.

PuLP, MILP and CBC working together in a Python optimization model

Let me explain what’s actually happening under the hood.

Tradelines for Sale 2026: What Buyers Need to Know

Every year around this time I get a wave of people asking whether tradelines are still worth buying. “Are they still working in 2026?” Short answer: yes. Longer answer: it depends on what you’re buying and who you’re buying from — and that part hasn’t changed since I started doing this.

The Client Who Changed His Mind (And Why I Finished the Job Anyway)

Years ago, I was doing gigs on Fiverr. Mostly Excel work — macros, pivot tables, solver models. I had a profile and a handful of listings, and I’d written about that whole love/hate experience back in 2017 (short version: the clients who treat you like a vending machine are the price you pay for the ones who bring you genuinely interesting problems). One day, a genuinely interesting problem showed up.

A training company needed help scheduling their staff. Multiple clients, multiple courses, multiple instructors, limited hours, shared equipment, weird simultaneous constraints. Classic Operations Research territory. I said yes.

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