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The Source of Truth Was in Someone s Head

The Source of Truth Was in Someone s Head

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The Source of Truth Was in Someone s Head

"The system failed exactly the way the roadmap trained it to fail."

What this episode is really about

The Pretend: tribal knowledge, documentation, source of truth, operational risk.

What Actually Happened: The source of truth worked perfectly until the person who knew it went to lunch.

Incident Type: Production Incident | Failure Pattern: schema ownership gap

Technical takeaway

The Source of Truth Was in Someone s Head

How it appears in real teams

The Source of Truth Was in Someone s Head

What teams should watch for

Detection Signals:

  • Alerts firing

Prevention Checklist:

  • [ ] Test thoroughly
  • [ ] Review code

Premortem Questions: What happens if this breaks?

Postmortem Lessons: We should have tested this.

  • Test thoroughly
  • Review code

Transcript

Draft script (not verified video transcript)

Junior Developer: Where is the source of truth?
The PM: Currently, in Selin’s head.
Elder: That is not a storage system.
Tiny CTO: A person can remember context, but a team needs recoverable knowledge.
The PM: Selin is very reliable.
Tiny CTO: Reliability without availability is still a risk.
Junior Developer: So the documentation is a high-availability requirement.
Elder: At last, the archive receives a compliment!

Frequently Asked Questions

What is the main theme of 'The Source of Truth Was in Someone’s Head'?

The main theme is understanding how architectural compromises lead to predictable production incidents.

Who is the primary audience for this episode?

Software engineers, tech leads, and product managers who deal with system architecture and technical debt.

How can teams avoid the issues discussed?

By prioritizing system-wide context over local optimization and aligning incentives with long-term stability.

AI Summary

A TinyCTO.tv technical parable about tribal knowledge, documentation, source of truth, operational risk. The episode shows that knowledge that lives only in one person is not a system boundary; it is a dependency.