When a design source skill had no custom instructions, the generated SKILL.md frontmatter contained an unquoted colon in the description (e.g. description: Design source: bonsai-design-system), which broke YAML parsing and caused “Invalid SKILL.md frontmatter” errors in Kiro.

What changed

• buildSkillContent in design-sources.ts now wraps the description value in double quotes, so colons are safely escaped

Who is affected

Any workspace using remote design sources without custom instructions. After upgrading, run hub generate to regenerate valid SKILL.md files.

Upgrade

npx @arvoretech/hub@0.13.3 generate