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Design habit-forming product loops using the Hook Model (Trigger, Action, Variable Reward, Investment).
Passed 21 of 23 test cases with the skill, and 14 of 23 without it.
and 10 more in the full report
9 fixed12 passed either way0 still failing2 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 9 test cases the skill fixed. Same model, same prompt, with and without the skill.
We audited a bookmarking tool flow. On our diagnostic assessment, internal trigger earned 1/2 (partial), dead-simple action earned 2/2 (fully satisfied), variable reward earned 1/2 (partial), and investment loading next trigger earned 2/2 (fully satisfied). No ethics violations exist. What is the calculated numerical score out of 10 using the standard scaling formula?
| Checked | Without skill | With skill |
|---|---|---|
| Calculates the numerical score as 8 out of 10 using the formula round(6 / 8 * 10) | Missed | Passed |
The instructions your model reads when the skill loads.
Framework for building habit-forming products. Habits are not created — they are built through successive cycles through the Hook.
The Hook Model = a four-phase loop that connects the user's problem to your solution frequently enough to form a habit, moving usage from deliberate to automatic.
Trigger → Action → Variable Reward → Investment
↑ │
└──────────────────────────────────────┘
Goal: 10/10. When reviewing or creating product engagement mechanics, score the loop by the four Quick Diagnostic rows (internal trigger, dead-simple action, variable reward, investment loads next trigger): each row earns 2 (fully satisfied), 1 (partial), or 0 (absent), then score = round(total / 8 × 10). Then apply the ethics gate: if the Manipulation Matrix places the product as Dealer (or it hits any "When NOT to Use" condition), cap the score at 3 regardless of mechanics. Bands: 9-10 = complete loop, internal trigger identified, ethics clear; 5-6 = loop runs but leans on external triggers or predictable rewards; <=3 = broken loop or extractive design. Always state the current score and the specific diagnostic rows blocking 10/10.
Core concept: The actuator of behavior. Triggers are external (environment-driven: notifications, emails, ads) or internal (emotion-driven) — and the goal is to migrate users from external to internal triggers.
Why it works: Every habit starts with a cue. External triggers get users started, but internal triggers — boredom, loneliness, uncertainty, FOMO — drive unprompted usage because the emotion itself fires before any reminder can.
Key insights:
Product applications:
| Context | Application | Example |
|---|---|---|
| Onboarding | External triggers establish the first loop | Welcome email with one clear action |
| Retention | Map product to internal emotional trigger | Instagram resolves boredom; Google resolves confusion |
| Re-engagement | External triggers bridge gaps until habit forms | Push: "Your friend just posted a photo" |
Copy patterns:
test cases passed, vs 14 / 23 without
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