Writing — notes from building AI products | Brain Quest
Brain Quest
Writing

Notes from building.

What we ran into, what we changed, and what we would do differently. Mostly written the week it happened.

6 posts
What we learned shipping an AI interviewer to production
Applied AI 6 min

What we learned shipping an AI interviewer to production

Latency, refusals, and the moment a candidate realises they are talking to a model.

July 2026
Your brand is being summarised. Here is how to read it
GEO 9 min

Your brand is being summarised. Here is how to read it

Tracking how answer engines describe a company, and what actually moves a citation.

June 2026
A CMS that a model can write to without breaking the site
Engineering 5 min

A CMS that a model can write to without breaking the site

Schemas, guardrails, and why generated pages need the same review as human ones.

June 2026
Designing for the answer that might be wrong
Design 7 min

Designing for the answer that might be wrong

Confidence, sources, and undo. The three controls every AI interface needs.

May 2026
Evals are the only roadmap that survives a model upgrade
Engineering 4 min

Evals are the only roadmap that survives a model upgrade

Small, boring test sets beat clever prompts every single time.

April 2026
What an AI feature costs when a thousand people use it
Applied AI 8 min

What an AI feature costs when a thousand people use it

Token maths, caching, and the point where a demo becomes a bill.

March 2026