Release v3.24.0: Add product-growth

Add product-growth v1.0.0: diagnose product growth from business data and actively discovered feedback, distinguish attribution from causal effects, and turn findings into verifiable actions.

Adapt metrics to the product’s value event, natural cadence and economics. Include synthetic worked examples, optional specialist adapters, and explicit evidence-freshness and implementation boundaries.

claude plugin install product-growth@daymade-skills

The attached .skill package contains the seven reviewed method files. Verification covers representative analysis and action-selection scenarios; business effects remain to be measured.