Erik Hill

AI evaluation & testing engineer. I build the tests that catch AI when it's wrong — deterministic graders, not a model grading itself. Shipped a game to Google Play. 12 public repos, most runnable in

Charleston, SC Joined on Jul 15, 2026 https://egnaro9.github.io

Erik Hill

Jul 25

I built a tool to prove my multi-agent harness was worth it. It told me it wasn't.

#showdev #ai #llm #testing

4 min read

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Erik Hill

Jul 24

My LLM drift tracker flagged four regressions this week. All four were wrong.

#ai #llm #monitoring #testing

4 min read

Erik Hill

Jul 23

The AI Crash Test: adversarial LLM testing you can audit in the Network tab

#ai #llm #security #opensource

3 min read

Erik Hill

Jul 22

301 duplicate IDs in the browser, 0 on the JVM: one real bug, end to end

#showdev #testing #java #webdev

5 min read

Erik Hill

Jul 21

Distinguishing wrong from absent

#machinelearning #llm #ai #testing

1 min read

Erik Hill

Jul 21

I built agentic AI that checks its own work — a 90-second tour

1 min read

Machine-checked proof and human-gated actions

Erik Hill

Jul 20

I built an AI dev harness that isn't allowed to trust itself

#showdev #ai #llm #programming

4 min read

Erik Hill

Jul 19

Set membership is not pairing: a property test that was green for the exact bug it was written to catch

#testing #python #softwareengineering #llm

4 min read

Erik Hill

Jul 16

The Cold-Context Critic: A Reviewer That Never Remembers Writing the Code

#ai #agents #codereview #softwareengineering

4 min read

Erik Hill

Jul 15

A differential oracle: making agentic code prove its own correctness

#ai

2 min read

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Erik Hill

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I built a tool to prove my multi-agent harness was worth it. It told me it wasn't.

Want to connect with Erik Hill?

My LLM drift tracker flagged four regressions this week. All four were wrong.

The AI Crash Test: adversarial LLM testing you can audit in the Network tab

301 duplicate IDs in the browser, 0 on the JVM: one real bug, end to end

Distinguishing wrong from absent

I built agentic AI that checks its own work — a 90-second tour

I built an AI dev harness that isn't allowed to trust itself

Set membership is not pairing: a property test that was green for the exact bug it was written to catch

The Cold-Context Critic: A Reviewer That Never Remembers Writing the Code

A differential oracle: making agentic code prove its own correctness