02 — Articles

Articles.

Notes from the build: what broke, what I measured, what I'd do again.

  1. Oct 2026 · Data engineering · Dagster · dbt

    The partition is the date

    Building a replayable daily pipeline on France's business register with Dagster, dbt and DuckDB — and how one design decision deleted a whole class of date bugs.

  2. May 2026 · RAG · LLM · pgvector

    A hallucinated tax threshold is worse than no answer

    What building RAGuette — a citation-only RAG assistant for French freelancer admin questions — taught me about grounding, provenance, and free-tier engineering.

  3. Jun 2025 · Security · Graph ML · PyTorch Geometric

    Attacks are relational — your detection should be too

    Detecting credential stuffing in real production auth logs with Graph Auto-Encoders: why modeling logins as a graph beat row-by-row analysis, and what a 0.37 → 0.93 AUC jump taught me.