---
description: Configure project settings in .c3/settings.yaml
---

Create or update `.c3/settings.yaml` with project-specific preferences.

Use the `c3-config` skill to configure:
- Diagram tool preferences (mermaid, PlantUML, etc.)
- Layer-specific documentation guidance (context, container, component)
- Team guardrails and constraints
- Post-ADR handoff steps
- Audit findings handling