One new stacked commitment per month maximum — overloading…

When This Fires

• When planning to add new behaviors to an existing routine chain
• When the temptation is to overhaul an entire routine at once ("new me" syndrome)
• During habit-building planning when allocating behaviors to installation months
• Complements Automate each habit link before adding the next — stacking… (sequential automation) and Maximum 1-3 active implementation intentions at a time… (1-3 implementation intentions) with the stacking-specific rate limit

Common Failure Mode

Rapid chain extension: "My morning routine works great — let me add meditation, journaling, exercise, AND cold shower this month." Four new links in one month, none of which are automated. The chain collapses within two weeks because the cumulative willpower cost of four non-automatic behaviors exceeds daily reserves. One per month: meditation this month, journaling next month, exercise the month after.

The Protocol

(1) When you want to add a stacked behavior, check: have you added one this month already? If yes → queue it for next month. (2) Install the one new behavior with full support: trigger design (Agent triggers must be observable or measurable — vague…), scaffolding (Add temporary scaffolding during the first 2-4 weeks…), first-five protection (The first five consecutive executions of a new trigger…). (3) Verify automaticity (Test habit automaticity by effort level, not frequency…) before considering the installation complete. (4) Only after the current link passes the automaticity test → the next queued behavior can be installed next month. (5) Accept the pace: a 5-link morning chain takes 5 months to build properly. This feels slow but produces a self-sustaining sequence. Simultaneous installation is faster to attempt but fails within weeks.