feat(hooks): add schema validator and enhance skill generation
refactor(*): align all components with the new frontmatter schema
refactor(commands): replace arguments object with simple argument-hint
refactor(agents): remove invalid version field from agent frontmatter
test(hooks): add unit tests for frontmatter validation and generation
feat(default): add session-handoff skill to enable seamless context resume
refactor(arch): move complex orchestration from commands into skills
feat(pm-team): add orchestrator skills for pre-dev planning workflows
feat(dev-team): add skill to manage development cycle state (status/cancel)
feat(default): add skill to formalize git commit generation process
refactor(default): prune granular skills to focus core library on workflows
fix(pmo-team): align pmo-retrospective skill name with ring convention
docs: update all documentation to reflect major skill refactoring
