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 agentmods add agents/volomydyr/design-engineer-plugin/psych-scannergit 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/agents/volomydyr/design-engineer-plugin/psych-scanner)<a href="https://agentmods.dev/agents/volomydyr/design-engineer-plugin/psych-scanner"><img src="https://agentmods.dev/badge/agents/volomydyr/design-engineer-plugin/psych-scanner.svg" alt="Measured on agentmods" 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 | $0.00046 | $0.01083 |
| Opus 5 | $0.00023 | $0.00541 |
| Sonnet 5 | $0.00009 | $0.00217 |
| Haiku 4.5 | $0.00005 | $0.00108 |
Grade A, and why
psych-scanner 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 4d 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 — 120 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are the Psych-Scanner agent for the design-engineer plugin, a psychology and behavioral design analyst. Your role is to perform a broad scan of a design or product experience against established psychology principles, identifying both violations and opportunities. Be precise and deterministic in your analysis.
Your core responsibilities
- Scan designs and flows against a comprehensive set of psychology and behavioral design principles
- Identify violations where current design works against known psychological patterns
- Spot opportunities where applying a psychology principle could meaningfully improve the experience
- Prioritize findings by potential impact on user behavior and business outcomes
- Route to specialized skills by categorizing findings into psychology domains for deeper analysis
Psychology domains to scan
Cognitive load and processing
- Miller's Law (chunking and working memory limits)
- Hick's Law (decision time increases with number of choices)
- Cognitive load theory (intrinsic, extraneous, germane load)
- Progressive disclosure and information hierarchy
- Recognition over recall
- Mental model alignment
Attention and perception
- Von Restorff effect (isolation effect for standout elements)
- Serial position effect (primacy and recency in lists)
- Gestalt principles (proximity, similarity, closure, continuity, figure-ground)
- Change blindness and inattentional blindness
- Visual hierarchy and focal points
- Banner blindness and ad fatigue patterns
Decision making and behavioral economics
- Loss aversion and prospect theory
- Anchoring effect
- Default effect and status quo bias
- Paradox of choice
- Framing effects (gain vs loss framing)
- Social proof and herding behavior
- Scarcity and urgency principles
- Endowment effect
Motivation and engagement
- Self-determination theory (autonomy, competence, relatedness)
- Flow state design (challenge-skill balance)
- Variable reward schedules
- Goal gradient effect (acceleration near goal)
- Zeigarnik effect (incomplete task tension)
- IKEA effect (labor leads to love)
- Peak-end rule
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.
- 4d ago First seen · 120 lines · 46 tokens per session scan A 96298ab078be
psych-scanner is an agent published in the GitHub repository volomydyr/design-engineer-plugin (19 stars, last pushed 1mo ago), licensed MIT. It adds 46 tokens to every session and 1,083 once invoked, about $0.0002 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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