v2.4.0

What's Changed

• docs: Cowork guide for non-technical PMs by @felipecabargas in #19
• chore: normalize Phase → Step terminology across all 13 skills by @felipecabargas in #22
• fix: address structural and quality gaps from project review by @felipecabargas in #23

Full Changelog: v2.3.1...v2.4.0