Design a Doc-as-App Model: Tables + Formulas + Buttons (OOD)

Problem

Design Coda's core: documents that combine text, tables, formulas, and buttons/automations into mini-apps.

Requirements

• Pages contain blocks: text, table, formula, button
• Formulas reference table data and recompute
• Buttons trigger actions (add row, set value)
• Views over the same table

What evaluators look for

• Uniform block model with type-specific behavior
• Dependency graph for formulas
• Action/automation abstraction

Extension

Support cross-doc references and discuss recompute scope.