# Devin Validates Devin CLI/Desktop workspace rules under `.devin/rules/` and legacy `.windsurf/rules/`, plus Devin-native `.devin/skills` whose frontmatter is optional and extends the portable Agent Skills dialect. Windsurf `.windsurf/skills` use portable Agent Skills validation. Enabled automatically when Devin repository context is present. | Rule ID | Description | Default Severity | Autofix | |---------|-------------|------------------|---------| | [`devin-rules-valid`](devin-rules-valid.md) | Devin workspace rules must have valid activation frontmatter and fit its size limit | error (auto) | - | | [`devin-skill-valid`](devin-skill-valid.md) | Devin-native SKILL.md frontmatter must use Devin's documented field shapes | error (auto) | - |