Dan Levy

Field notes

Notes from where the docs run out.

AI systems, JavaScript, security, databases, and bug fixes worth remembering.

No Fate But What We Bill

Agents keep working longer, swarms keep fanning wider, and stolen cloud keys send the compute bill to the victim.

A weathered electricity meter feeds a thick red cable through an open doorway toward industrial machines.8 min readCategory Security

Give Your Agent a Profiler

Benchmarks say whether. Profiles say where. Agents guess the rest.

Three linked inspection lenses reveal a paper website's visual layout, orange profiling strips, and green keyboard-focus outlines.12 min readCategory Code

How to Hire an AI Engineer Without Getting Burned

Hire for the judgment that keeps showing up

A miniature steel bridge supporting three orange weights, with a measurement probe beneath its span.10 min readCategory Leadership

Auto-Tune Your LLM Judge

Measure the evaluator's variance, then rebuild its prompt from zero.

Auto-Tune Your LLM Judge9 min readCategory AI

Announcing ExploitHunter.app

An open-source security workbench that keeps scope, approvals, tools, and evidence in one project.

A silver magnifying glass reveals torn vermilion paper fibers and a metal fragment amid black paper and monochrome evidence scraps.10 min readCategory AI

Don't Fear the Model Router

Route to the best model with confidence.

A monochrome cut-out hand places a lilac parcel aboard a workboat at a fork in mustard waterways; a barge carries papers and a repair tug carries a wrench along other branches.8 min readCategory AI

Into the Breach

Reduce local-dev risk with containers, canaries, and boring limits

A torn flap and loose fragments on the outer layer of a sweeping black paper chamber, with an intact inner curl lit by warm amber light.4 min readCategory Security
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Postgres Text Searching Guide 2026

The search tools already in your database, and when each one earns its keep.

A woodcut alpine landscape combines layered mountain strata, similar marked stones and one square vermilion stone at the end of a red path.9 min readCategory Code

Fight Evils with Evals!

Benchmarks measure benchmarks. Your system needs its own measures.

An oversized burgundy paper dinner jacket hangs around an irregular pink silhouette, with a pale torn seam revealing the mismatch.6 min readCategory AI