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Technical writing

Engineering notes

Two notes rather than ten: each starts from a problem I actually had to solve.

  1. 2026-11-12 · 2 minreal time · MongoDB · reliabilityOne bid, exactly once — idempotency inside the write that claims the priceIn a live auction the question isn't "did the request succeed?" but "what do we answer the one that comes back?". A design decision from Maison Dlala.
  2. 2026-11-10 · 2 minLLM · extraction · evaluationA correct value, attributed to the wrong objectWhy LLM information extraction rarely fails on the value and often on the object it belongs to — and how to measure it.

Only what my work lets me claim.