@bullisderek5

Building an eBay Best Offer Decision Engine in Python

3d ago · 5 min read · eBay sends Best Offers to active listings, and most sellers respond by feel — accept, decline, counter — without doing the math on whether the offer actually clears their cost basis. I built a script that pulls open Best Offers via the eBay Trading A...

Building a Loan Tracker That Lives in CSV Instead of a Spreadsheet

Apr 15 · 6 min read · I track several private loans — money I owe, money owed to me, money owed to family. The default tool for this is a Google Sheet with formulas. I tried that for three months and it didn't work, because every loan payment required me to open the sheet...

Building a Daily Intel Brief from 12 Data Sources in Python

Apr 15 · 6 min read · Every morning at 7 AM I read a single document. It tells me the weather, my calendar for the day, what sold on eBay overnight, my Bitcoin position, the Fear & Greed index, what's in my AR/AP aging, what's in my task queue, what VA deadlines are appro...

The Agent OS: How One Mac Runs My Entire Operation

Apr 15 · 4 min read · The Agent OS: How One Mac Runs My Entire Operation There's a Mac mini sitting on my desk connected to a Seagate external drive. Between the two of them, they run six businesses, track my family's entire documentation system, monitor government benefi...

Building an ADHD-Friendly Task Orchestration System with Claude and Python

Apr 11 · 6 min read · Building an ADHD-Friendly Task Orchestration System with Claude and Python I built a task orchestrator that runs on a Mac, pulls open tasks from a CSV, runs Claude against them, and writes back a prioritized action list. Total stack: ~250 lines of Py...