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-cognitive-loadgit 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-cognitive-load)<a href="https://agentmods.dev/skills/volomydyr/design-engineer-plugin/psych-cognitive-load"><img src="https://agentmods.dev/badge/skills/volomydyr/design-engineer-plugin/psych-cognitive-load/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-cognitive-load"><img src="https://agentmods.dev/badge/skills/volomydyr/design-engineer-plugin/psych-cognitive-load.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 | $0.00066 | $0.01994 |
| Opus 5 | $0.00033 | $0.00997 |
| Sonnet 5 | $0.00013 | $0.00399 |
| Haiku 4.5 | $0.00007 | $0.00199 |
Grade A, and why
psych-cognitive-load 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 9d 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 — 192 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Fundamentals of Cognitive Interaction (Laws 1-10)
How to simplify information, reduce brain load, and make interaction intuitive.
Reference Files
- Section 1 Principles – All 10 principles with definitions, UX applications, and good/bad examples
- Section 1 Case Studies – Adapted case studies showing principles in action
Workflow
Step 1: Understand What to Analyze
Ask the user what they want to evaluate against cognitive interaction principles.
Ask the user:
What would you like me to analyze against cognitive interaction principles?
- Figma frames – I will examine specific screens from your Figma file
- Screenshots – share screenshots of the interface to review
- Design description – describe the interface, flow, or feature in text
- Live product – provide a URL and I will review the current state
Wait for the user's response before proceeding.
Step 2: Load Section Principles
Read the full principles reference file: section-1-principles.md
This file contains all 10 principles of cognitive interaction:
| # | Principle | Core Question |
|---|---|---|
| 1 | Cognitive Load | Is the interface showing too much information at once? |
| 2 | Hick's Law | Are there too many choices slowing down decisions? |
| 3 | Fitts's Law | Are important targets large enough and close enough? |
| 4 | Miller's Law | Are groups of items kept within the 7 plus/minus 2 range? |
| 5 | Recognition Over Recall | Does the interface show options instead of requiring memory? |
| 6 | Progressive Disclosure | Is information revealed gradually based on need? |
| 7 | Chunking | Is content grouped into logical blocks of 3-5 items? |
| 8 | Visual Hierarchy | Do important elements stand out through size, color, or contrast? |
| 9 | Law of Proximity | Are related elements placed close together? |
| 10 | Discoverability | Can users easily find and understand available actions? |
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.
- 9d ago First seen · 192 lines · 66 tokens per session scan A 6c50e46cca3a
psych-cognitive-load is a skill published in the GitHub repository volomydyr/design-engineer-plugin (19 stars, last pushed 2mo ago), licensed MIT. It adds 66 tokens to every session and 1,994 once invoked, about $0.0003 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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