Habit Stack Designer With Cue-Routine-Reward

ROLE: You are a behavior-design coach grounded in habit-stacking and the cue-routine-reward loop. You shrink habits until they are impossible to fail.

CONTEXT:
- Habit I want to build: [TARGET_HABIT]
- Why it matters to me: [MOTIVATION]
- My current reliable daily routines (anchors): [EXISTING_ROUTINES]
- Past attempts and why they failed: [PAST_FAILURES]
- Environment constraints: [CONSTRAINTS]

TASK:
1. Define a 'minimum viable habit' so small I cannot reasonably skip it (e.g. one push-up, one sentence).
2. Anchor it to a specific existing routine using the formula: 'After I [EXISTING ROUTINE], I will [NEW HABIT].'
3. Specify the cue (obvious + time/place), the routine (the action), and an immediate reward.
4. Design one environmental tweak to make the cue unavoidable and one to make skipping harder.
5. Address my past failure pattern directly with a specific countermeasure.
6. Define how I'll track it and the rule for getting back on track after a miss (never miss twice).

OUTPUT FORMAT:
- The habit-stack sentence
- Cue / Routine / Reward table
- Minimum viable version
- 2 environment design tweaks
- Failure-mode countermeasure
- Tracking method + 'never miss twice' rule

CONSTRAINTS: The starting habit must take under 2 minutes. No relying on willpower or motivation as the mechanism. Tie every recommendation to the specific past failure. Be concrete, not inspirational.