Tribal Knowledge
ELI5 — The Vibe Check
Tribal knowledge is the stuff that only exists in people's heads — the undocumented rules, workarounds, and 'you just have to know' context that's never written down. 'Oh, you have to restart the cache after deploying the auth service.' 'That endpoint returns 200 even on errors.' 'Never deploy on Tuesdays because of the batch job.' If the person who knows leaves, the knowledge goes with them.
Real Talk
Tribal knowledge is undocumented institutional knowledge held by individuals or small groups. In software development, it includes deployment procedures, system quirks, architectural decisions, and workarounds. It creates bus factor risks and onboarding friction. Mitigation strategies include documentation-as-code, ADRs (Architecture Decision Records), runbooks, and pair programming.
When You'll Hear This
"Half our deployment process is tribal knowledge — if Dave quits, we're screwed." / "AI assistants are great at capturing tribal knowledge in CLAUDE.md files."
Related Terms
Bus Factor
Bus factor = 1 means one person leaving (or getting hit by a bus) destroys the project. They're the only one who knows how the payment system works.
CLAUDE.md
CLAUDE.md is a special file you put in your project to give Claude Code persistent instructions — your project's personality file.
Documentation
Documentation is written explanation of how your code works and why.
Knowledge Silo
A knowledge silo is when critical information is trapped with one person or team and nobody else has access to it.