Create product marketing foundation doc

Create and maintain foundational product marketing positioning document

First step in any marketing project when context files don't exist; strongly recommended to auto-draft from codebase rather than starting from scratch, then iterate with team.

• · Codebase (README, landing pages, marketing copy, package.json)
• · Team input on positioning, personas, differentiation (if auto-drafting skipped)

• · PRODUCT.md, MARKET.md, GROWTH.md context documents
• · Single source of truth for positioning, personas, objections, switching dynamics

• · Product and positioning already exist (not inventing strategy)
• · Team available for review and correction of draft

• · Document created but never maintained — becomes stale and misaligned with product
• · Auto-draft from codebase misses strategic nuance (reads marketing copy but not actual strategy)
• · Over-detailed — teams don't reference it because it's too long

• · Detailed taxonomy of nine sections: product overview, audience, personas, pain points, competitive landscape, differentiation, objections, switching dynamics, customer language
• · Explicit emphasis on verbatim customer language (not polished descriptions)
• · Two distinct workflows: auto-draft (faster) vs. from-scratch (more deliberate)
• · Clear instruction to read codebase: README, landing pages, marketing copy, about pages, meta descriptions