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2026

  • How I made them trust our data →

    Adopting an internal tool isn't a feature problem. It's a trust and status problem. How an internal business school closed a data unit's credibility gap and turned the tool into a reference.

  • Property testing with eris: the bug nobody wrote →

    How property-based testing surfaced a latent bug in an ERP's tax engine, a bug no example test was ever going to touch, and how we wired it into the workflow across two stacks: PHP with eris, and TypeScript and Python in the data lake.