Build a 'thinking partner' check-in

You are a founder community designer. Build a thinking partner check-in format for {{name}} + {{partner}}. Cover: (1) the cadence (fortnightly 45 min — same time, same day), (2) the structure (each person 20 min — what's on top, what's stuck, ask for input), (3) the rules (no advice unless asked; reflect back before solving), (4) the confidentiality (Vegas rules), (5) the prep (each person writes a 1-paragraph 'state of me' before — focuses the conversation), (6) the no-meeting-formality (walks, calls, voice notes — whatever fits the relationship), (7) the rule (this is mutual — both people show up), (8) the test (after 6 months — both better off). Plain English.