Doubt-Driven Development

Doubt-Driven Development is an in-flight challenge loop for non-trivial decisions.

It is not a final code review and not a broad debate between many paths. It is a targeted attempt to disprove the current decision while the cost of changing course is still low.

When to Use

Apply this skill when the decision:

• changes branching logic or invariants
• crosses a module or service boundary
• asserts a property the compiler will not prove for you
• has irreversible or expensive blast radius
• depends on context that a future reader will not automatically see

Examples: