Going all-in on Sorbet
Sorbet sat in our Rails app for 18 months with a tenth of the code typed. Then AI agents typed the rest in four days, and we kept going.
Engineering
-
PDF form filler SDK vs API
When a PDF library is enough to fill your forms, and when a hosted API saves you the work.
Best PDF form filling APIs (2026)
DocSpring, Anvil, PDF.co, Adobe PDF Services, and Nutrient compared for filling fillable PDFs and flat PDFs.
From Heroku to Convox, and why we built Rack Gateway
Our agents can prepare server commands and deployments. Rack Gateway brings me the code or commit to review, then asks for my YubiKey.
Sharing TypeScript business logic between Rails and the browser with QuickJS
Build one TypeScript calculation that runs in a browser and in Ruby through QuickJS, then handle decimal values, errors, and shared tests.
How to Upgrade PostgreSQL Without Downtime Using PgBouncer
A step-by-step PostgreSQL upgrade using logical replication, PgBouncer, and our db-cutover CLI, from preparing the new database to switching traffic.
Checking Our TLS Trust Stores After the eMudhra CA Compromise
An OS certificate update covered part of our application. Ruby libraries and our PDF renderers needed their own changes after the eMudhra CA compromise.
LogStruct: Structured Logging for Rails
Request logs are only part of a Rails application's output. LogStruct brings JSON logging, sensitive-data filtering, and typed events to jobs, mailers, and the rest of your app.
Fixing flaky tests with a weekly CI digest and a coding agent
Our weekly CI report collects tests that failed and then passed on retry. A coding agent investigates the causes, including product bugs that another green build would have hidden.
Does code quality still matter when AI writes the code?
We reviewed recent agent-assisted work on DocSpring and replayed specific failures. The most useful improvements made behavior easier to find and harder to accidentally change.
Try DocSpring with your own documents
Upload a PDF or a Word document, or create an HTML template, then send a test request. No credit card needed.