Selected work

Systems worth
opening up.

Case studies about the machinery: what the system had to guarantee, where it could fail, and the decisions that made it hold together.

AI systemsRetrieval, evaluation, and grounded model behavior
BackendState, concurrency, and explicit failure modes
ProductUseful interfaces around complicated machinery
01

Professional work

02
03

More projects

04

Open-source contributions

Local embedding credentials · 2026

mnemex

Diagnosed an unconditional OpenRouter key gate that prevented Ollama, LM Studio, and other local embedding providers from running without a dummy cloud credential, then proposed provider-aware validation.

The maintainer rebased the fix onto current main and retained Spencer and Claude as co-authors.

The shorter version

The resume has the outcomes. These pages have the mechanisms.

View resume