Notes on building software and keeping it alive, from the people who do both. Written for the person paying for it, not for other agencies.
Certificates, APIs, runtimes, email and browsers all move on published schedules. What breaks on an unmaintained site, when, and what visitors see.
What a live site or app actually needs after launch, what maintenance costs in Canada, and the four things to insist on in a maintenance agreement.
Maintenance quotes blend infrastructure and labour into one number. How to separate them, and the arithmetic that tells you which plan you're being sold.
The test for whether a process needs an AI agent or a plain script, and where the cost multiples everyone quotes actually came from.