Open the context
Choose the project folder and name the files or behavior involved.
Workflows
Coding workflows · Environment configuration
03
A concrete starting point
Validate environment configuration before starting a service. Reject missing or out-of-range ports and report the variable name without printing secrets.
Define the change
Describe the input, expected output and boundaries that must stay intact.
Inspect the work
Review the proposed edits and any commands before relying on their result.
Check the outcome
Compare actual behavior with the expected result. If a check fails, investigate it before applying more changes.
Environment configuration
A concrete starting point
const port = Number(env.PORT);
if (!Number.isInteger(port) || port < 1 || port > 65535) {
throw new Error('Invalid PORT');
}
return { port };The example is a starting point for a real project, not a claim that generated code is already tested. Adjust paths, dependencies and expected behavior to match your application.