Best Practices Expire
Rules are compressed experience, and they expire. On dogmatism in software development, how to detect it, and why discussing it as a team won't automatically save you.
George Guimarães.
AI and Agentic Engineering in Elixir. Linking processes and people.
Leidenfold: Leiden Community Detection for Elixir
Leiden community detection for Elixir, powering Arcana's GraphRAG.
What I'd Tell My Younger Self About Building Software and Scaling Teams
If I could go back in time, what would I tell myself? Lessons from a career of building software and scaling teams, in four pillars: product, process, engineering, and people.
You're a Dumb Security Leader if You Mandate Password Rotation
NIST, Microsoft, and the FTC all agree: forced password rotation makes you less secure.
One GitHub Account Forever. Ditch Your Company Policy.
Your GitHub account is yours, not your company's. Here's how to keep your contribution graph intact across jobs.
Hallmark: detect LLM hallucinations locally in Elixir
Score whether an LLM's output follows from your source material or if it's hallucinated. Runs locally in Elixir, no API calls.
Your Test Suite Should Hit the LLM, Stop Mocking It
Your test suite should call the LLM API. For real. Not a mock, not a recorded cassette, not a fake that returns canned JSON.
Arcana: Embeddable RAG for Elixir/Phoenix
Everything I've learned building RAG systems, packaged into one Elixir library. Hybrid search, agentic pipelines, GraphRAG, all running on your existing Ecto Repo and pgvector.