A customer clicked "Export to CSV" on 380,000 records. The server loaded them all into memory, OOMed, and took the API offline for every tenant. The fix was straightforward. The real question is why nobody caught it sooner.
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Hello, I'm Luke
Applied AI architecture, agent harnesses, and notes from getting AI systems into production.
Latest Posts
- Our monitoring said everything was fine. Customers said it wasn't. Turns out, the API returned HTTP 200 for every response — including the ones that failed. The dashboards were blind.
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- A client's AI coding agent had contents:write on every repo in the org. When I asked who approved that, the answer was "the setup wizard." The defaults are the danger zone.
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- Two teams, one PostgreSQL instance, zero ownership boundaries. A consulting story about what happens when microservices share a database — and how we eventually untangled it.
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- A Renovate auto-merge bumped a transitive dependency from 6.2.1 to 6.2.2. The patch fixed rounding behavior. Our invoice calculations disagreed.
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