For people building apps with AI tools
Practical help for the app you built with AI, page 2.
Latest articles
Stability
How to test email deliverability before launch: the tools, what each one checks, and what a pass looks like
Stability
An idempotency key for safe retries, and a dead letter queue: jobs that run once and failures you can replay
Performance
The image optimization checklist for websites and web apps: dimensions, formats, compression and delivery
Performance
A k6 load testing example against a real web app: the script, the thresholds to set, and the CI job that runs it
Performance
How to run a Lighthouse audit you can repeat, and how to raise the score afterwards
Performance
Locust load testing: when a Python load generator is the right choice, with a runnable file
Deployment
Man in the middle prevention for a web app: how traffic gets intercepted, what HTTPS already stops, and the settings that close the rest
Deployment
Open source feature flags and kill switches: turning a broken feature off without a deploy
Maintainability
The post-launch support checklist: defect cover, a question window, and how to agree both in writing
Maintainability
The software project handover checklist: 20 items in five groups, and the handover document both sides sign
Stability
SPF DKIM DMARC setup for the domain your app sends from: add the three records, then prove they pass
Stability
Stack traces are minified and unreadable: error tracking with private source maps, environment labels and alerts that mean something
Maintainability
Technical documentation for investors: the production readiness report and the due diligence pack, and how a reviewer reads them
Stability
Transactional email best practices for an app: a dedicated provider, the messages that must arrive, and proof each one did
Stability
Transactional emails landing in spam: how to find which of four causes you have, and get back to the inbox
Deployment
What are preview deployments: a reviewable URL for every pull request, with test data only
Performance
What is a capacity plan for a web app? How much traffic you can take, written so an investor or a customer can read it
Stability