[Verse 1] Sarah launches her new button color test Revenue climbing, conversion looking blessed But hidden underneath the surface gleam Customer complaints flood the support team Trust scores plummet while the profits soar One metric wins but breaks three others more [Chorus] Guard the rails, watch the core Revenue, retention, trust, and more Keep the vital signs alive While your experiments arrive M-O-N-I-T-O-R Every metric near and far Guard the rails, that's how you thrive [Verse 2] Tom speeds up his checkout with new code Page loads faster, conversions explode But server crashes spike at two AM Database groaning under the new gem Success in front-end, chaos in the back Balance crumbles when you lose the track [Chorus] Guard the rails, watch the core Revenue, retention, trust, and more Keep the vital signs alive While your experiments arrive M-O-N-I-T-O-R Every metric near and far Guard the rails, that's how you thrive [Bridge] Set your thresholds before you begin Error rates, latency, customer spin If support tickets double overnight Kill the test and make it right Automate the warning bells When your guardrail story tells [Verse 3] List your sacred metrics first The ones that hurt your business worst If they drop below the line Stop the test, rewind, align Profit means nothing if trust dies Sustainable growth is the real prize [Chorus] Guard the rails, watch the core Revenue, retention, trust, and more Keep the vital signs alive While your experiments arrive M-O-N-I-T-O-R Every metric near and far Guard the rails, that's how you thrive [Outro] Before you test, before you code Map the metrics you can't erode Guard the rails, guard them well That's the CTO's tale to tell
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