My Checklist for Production Release Day

I wrote this after repeatedly handling production release day execution on client projects. Release-day confidence comes from process. I share the checklist I follow before, during, and after production deployment.

Prepare Before the Release Window

Release-day confidence comes from process. I share the checklist I follow before, during, and after production deployment.

• deployment checklist — applied directly to production release day execution.
• smoke tests — applied directly to production release day execution.
• monitoring — applied directly to production release day execution.
• rollback planning — applied directly to production release day execution.

Putting It Together

The working version of My Checklist for Production Release Day centred on deployment checklist, smoke tests, monitoring, and rollback planning. I avoided copying patterns from other modules unless they solved a problem this feature actually had.

Observe Production Immediately After Launch

Representative code from the implementation — simplified for readability, but structurally what I deploy.

Cron heartbeat file for job monitoring

<?php
file_put_contents('/var/www/app/storage/cron-heartbeat.txt', time());
$last = (int) @file_get_contents('/var/www/app/storage/cron-heartbeat.txt');
if (time() - $last > 90000) {
    mail('ops@example.com', 'Cron failed', 'Nightly job did not run.');
}

Scoping a module before implementation

<?php
// Capture acceptance criteria as constants before coding
final class ModuleScope
{
    public const MUST_HAVE = [
        'validated input on every write path',
        'role-aware access on admin routes',
        'audit-friendly status transitions',
    ];
}

Practical Outcome From the Work

Once production release day execution was live, the team spent less time on rework because edge cases were handled at the boundary — not discovered in production.

If I repeated this, I would write the regression checks earlier — especially around the failure paths users hit once, not the happy path.

A Few Parting Notes

1. Start with the exact problem statement for production release day execution — one sentence, no buzzwords.
2. Prioritise deployment checklist before polishing secondary UI details.
3. Validate smoke tests under realistic data volume, not demo rows.