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(Constraint-Driven Startup Design)

Purpose: Keep your product lean, focused, and testable. Ship clarity, not bloat.


Step 1 — Define the Core Job

Write down the one job your product must do.


Step 2 — Write the “Never-Do” List

Explicitly state what’s off-limits for now.


Step 3 — Build the Minimum Testable Artifact (MTA)

Ask: "What can I build in a weekend that proves this job matters?"