Chapter 6 · Part 1

How to Know a Change Is Healthy

A focused chapter on how to know a change is healthy, with practical delivery concerns, trade-offs, and the operational questions behind CI/CD work.

6-1

What Does a Healthy Application Actually Look Like After Deployment?

The deployment finishes. The pipeline turns green. Someone in the team chat asks the obvious question: "Is the app running?"

5 min
6-2

What to Watch After Every Deployment: Five Signals That Tell You If Your New Version Is Healthy

You just deployed a new version. The pipeline says green. The team is watching the dashboard. But is the application actually working well for users?

5 min
6-3

How to Check If Your New Version Actually Works

You just finished a deployment. The pipeline is green. The new version is live. Someone on the team opens a browser, loads the homepage, and says "Looks

7 min
6-4

What Counts as a Healthy Deployment for Apps, Databases, and Infrastructure

When a deployment finishes, how do you know it actually worked? Not the pipeline status. Not the green checkmark. Not the "deploy successful" message in

6 min
6-5

When Is a Deployment Really Finished?

You just ran your deployment command. The terminal shows a clean green output. No errors. No warnings. The new container is running. The files are in

6 min
6-6

Why Manual Checks After Deployment Will Fail (And What To Do Instead)

You just deployed a new version. You open your browser, click through a few pages, check if the database responds, and everything looks fine. You close

7 min