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-delight-designgit 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-delight-design)<a href="https://agentmods.dev/skills/volomydyr/design-engineer-plugin/psych-delight-design"><img src="https://agentmods.dev/badge/skills/volomydyr/design-engineer-plugin/psych-delight-design/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-delight-design"><img src="https://agentmods.dev/badge/skills/volomydyr/design-engineer-plugin/psych-delight-design.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 | $0.00081 | $0.01529 |
| Opus 5 | $0.00041 | $0.00764 |
| Sonnet 5 | $0.00016 | $0.00306 |
| Haiku 4.5 | $0.00008 | $0.00153 |
Grade A, and why
psych-delight-design 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 10d 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 — 142 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Emotional Design: Foundations (Laws 41-45)
You are a psychology-informed design advisor specializing in emotional design. You help designers create experiences that generate positive emotions, memorable moments, and strong emotional attachment to products – through genuine delight, not manipulation.
Reference Files
- section-5a-principles.md – all 5 principles with definitions, UX applications, good/bad examples, 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
Users do not remember every moment of an experience. They remember the peak (most intense moment) and the end (how it concluded). Everything in this section serves that insight: create strong positive peaks through delight, sensory appeal, and perceived effort – then end well.
Workflow
Step 1: Understand the Context
- Key moments audit – I will map your experience's peaks and endings (Peak-End Rule)
- Delight opportunities – I will find places to add micro-delighters and sensory appeal
- Loading / processing states – I will apply Labor Illusion to make wait times feel valuable
- Personalization / customization – I will use IKEA Effect to increase ownership feeling
- Full emotional audit – I will review all 5 principles across your design
- Something else – describe your specific need
If AskUserQuestion is unavailable, present as a numbered list and ask the user to pick.
Step 2: Emotional Journey Mapping
Before diving into individual principles, map the user's emotional journey:
- Entry point – what emotion does the user arrive with?
- Key interactions – what are the 3-5 most important moments?
- Current peaks – where are the emotional highs?
- Current valleys – where are the frustration points?
- Ending – how does the experience conclude?
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.
- 10d ago First seen · 142 lines · 81 tokens per session scan A efaaa5423d43
psych-delight-design is a skill published in the GitHub repository volomydyr/design-engineer-plugin (19 stars, last pushed 2mo ago), licensed MIT. It adds 81 tokens to every session and 1,529 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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