**Source:** https://heykiku.com/glossary/single-source-of-truth

# Single Source of Truth

"Which version is current?" is the question that reveals whether an agency has a single source of truth. If the answer involves checking timestamps, asking the original creator, or guessing based on filename conventions, the answer is no. **A single source of truth means the question never needs to be asked**.

Agencies fail at this because their information doesn't start in one place. Logos arrive by email. [Brand guidelines](https://heykiku.com/glossary/brand-guidelines) come as PDFs attached to contracts. Rate cards live in the founder's Google Drive. Tone of voice exists as a Slack message someone screenshot two years ago. Each item is stored somewhere; none are consolidated. When the designer needs the current primary color hex code at 4pm on a Friday, there are three versions and no way to know which one the client actually approved.

Every agency has tried the shared drive approach. Within a month, someone emails a "final-final-v2" that never makes it back to the drive. The central location goes stale, people stop trusting it, and the silos return. **Consolidation isn't the hard part—staying consolidated is**. Without enforcement, the source of truth drifts into just another folder.

heykiku makes the source of truth the fastest place to get an answer. When your team asks a question, the answer comes from uploaded documents—not from memory, not from last month's email, not from the version someone saved locally. **The path of least resistance becomes the authoritative path**. When getting the right answer is quicker than hunting for an old one, the single source of truth actually stays single.

## Related terms

- [Agency Knowledge Base](https://heykiku.com/glossary/agency-knowledge-base)
- [Brand Guidelines](https://heykiku.com/glossary/brand-guidelines)
- [Asset Library](https://heykiku.com/glossary/asset-library)
- [Knowledge Silos](https://heykiku.com/glossary/knowledge-silos)
- [Knowledge Decay](https://heykiku.com/glossary/knowledge-decay)
- [Document Conflicts](https://heykiku.com/glossary/conflicting-documentation)
- [Client Confidentiality](https://heykiku.com/glossary/client-confidentiality)