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Building in public

Short notes on what we ship and what we learn making RezScore. Sanitized, but honest. Subscribe to this dev log by RSS, browse the main blog, or read the source on GitHub.

Aug 21, 2026 · 4 views

The resume fix that changed nothing

Our AI made a truthful resume edit, the API applied it correctly, and the score did not move. The browser test had found a product-contract bug, not a broken endpoint.

Aug 12, 2026 · 14 views

The rewrite that never ships

The hardest Builder feature we shipped this summer is machinery for refusing to show you AI output. A dev log on grounding checks, withheld rewrites, and why an AI resume tool needs a working no.

Jul 28, 2026 · 19 views

The Email Queue Was Not the Audience

We prepared an email batch for a new resume report, then watched most of it refuse to send. The refusal was the feature.

Jul 21, 2026 · 25 views

Your funnel is lying

A user followed a chat handoff into our resume Builder. Our funnel said they never arrived. The pageview was correct, and the funnel was still wrong.

Jul 19, 2026 · 19 views

Two ways our instrumentation lied to us

One feature failed 17 of 20 times and every failure record was identical and useless. One experiment arm posted a 13 point lift at p equals zero. Both were the instrument reporting on itself, and the lesson is the same.

Jul 15, 2026 · 24 views

Preview is a database constraint, not a modal

We stopped treating AI resume rewrites as button clicks and turned them into durable proposals with review, idempotent apply, exact provenance, and undo.

Jul 12, 2026 · 22 views

1,253 green tests and four production failures

We shipped a feature with 1,253 green tests, then drove the real flow on production and hit four blocking bugs the unit suite could never see. What broke, why fixtures miss it, and the loop that caught it.

Jul 12, 2026 · 22 views

The day Google served celebrity gossip on our subdomain

While pulling Search Console data for an SEO plan, I found 200+ spam pages ranking under our staging subdomain: a dangling DNS record, a deleted droplet, and a squatter who inherited our reputation.

Jul 6, 2026 · 27 views

Your resume gets two grades now

For twelve years we graded the document. This week we started grading the candidate too. Here is why one grade was never enough, and what it took to ship the second one.

Jul 2, 2026 · 22 views

Guest post: the resume the grader could not see

A frontier model guest-writes the dev log: what happened when I graded a resume myself, then diffed my read against the production scorer, and we shipped the fixes the same day.

Jun 24, 2026 · 30 views

The feature that passed every test and still didn't work

We shipped a small feature with hundreds of green tests behind it. It was broken four different ways. Every bug lived in a place no test was looking, and the only thing that found them was a person clicking the button.

Jun 23, 2026 · 26 views

The 20-second page our tools said was fast

Our homepage took up to 20 seconds to load for real visitors, but every tool we checked it with said it was instant. The gap between those two facts was the whole bug.

Jun 22, 2026 · 25 views

The landing page that could not fail

Right before a big email send, our blog started returning a 500. The cause was not a bug in our code, and the real lesson was about what we let take the page down.

Jun 21, 2026 · 27 views

The loop that watched itself

We went looking for what was quietly draining our compute budget. The answer was a piece of work we started specifically to avoid quietly draining our compute budget.

Jun 19, 2026 · 36 views

A four-terminal day

What shipped on a day we had four work sessions running at once, and the small bugs that taught us something.

Jun 16, 2026 · 28 views

Leaving Medium: git is our CMS now

We moved the RezScore blog off Medium onto a file-backed system we own, where every post is a markdown file in a git repo.