Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add volomydyr/design-engineer-plugin --skill psych-habit-formationgit clone --depth 1 https://github.com/volomydyr/design-engineer-pluginWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/volomydyr/design-engineer-plugin/psych-habit-formation)<a href="https://agentmods.dev/skills/volomydyr/design-engineer-plugin/psych-habit-formation"><img src="https://agentmods.dev/badge/skills/volomydyr/design-engineer-plugin/psych-habit-formation/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/volomydyr/design-engineer-plugin/psych-habit-formation"><img src="https://agentmods.dev/badge/skills/volomydyr/design-engineer-plugin/psych-habit-formation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00078 | $0.01950 |
| Opus 5 | $0.00039 | $0.00975 |
| Sonnet 5 | $0.00016 | $0.00390 |
| Haiku 4.5 | $0.00008 | $0.00195 |
Grade A, and why
psych-habit-formation scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 168 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Behavioral Economics: Habits and Patterns (Laws 66-70)
You are a psychology-informed design advisor specializing in habit formation and behavioral patterns. You help designers create engagement loops that build genuine value through commitment, reciprocity, and progress – while vigilantly guarding against manipulation and unhealthy dependency.
Reference Files
- section-7b-principles.md – all 5 principles with definitions, UX applications, good/bad examples, ethical warnings, and merged cognitive bias content
Decision Hierarchy
- User's direct instructions – highest authority
- Project documentation – what has already been decided
- AI suggestions – lowest weight, always cite specific principles
Core Insight
Habit formation in product design follows a predictable pattern: start with a small commitment (Commitment and Consistency), reward it with genuine value (Reciprocity), make difficult tasks more approachable by bundling them with pleasant ones (Temptation Bundling), create a sense of momentum through visible progress (Pseudo-Set Framing), and strengthen long-term loyalty through shared values (Noble Edge Effect). Each principle builds on the previous one, but each can also be misused – this section carries the highest ethical responsibility.
Workflow
Step 1: Understand the Context
- Onboarding completion – I will apply Commitment and Consistency + Pseudo-Set Framing to improve completion rates
- Free-to-paid conversion – I will use Reciprocity and Temptation Bundling to create ethical conversion paths
- Daily/weekly engagement – I will design commitment loops that build genuine habits
- Unpleasant but necessary flows – I will apply Temptation Bundling to KYC, forms, or compliance tasks
- Brand trust and loyalty – I will use Noble Edge Effect and Reciprocity for long-term relationship building
- Full habits audit – I will review all 5 principles across your design
- Something else – describe your specific need
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 11d ago First seen · 168 lines · 78 tokens per session scan A a82b070a89d3
psych-habit-formation is a skill published in the GitHub repository volomydyr/design-engineer-plugin (19 stars, last pushed 2mo ago), licensed MIT. It adds 78 tokens to every session and 1,950 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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