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 GalaxyRuler/Galactic-skills --skill ux-engineeringgit clone --depth 1 https://github.com/GalaxyRuler/Galactic-skillsWrote 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/galaxyruler/galactic-skills/ux-engineering)<a href="https://agentmods.dev/skills/galaxyruler/galactic-skills/ux-engineering"><img src="https://agentmods.dev/badge/skills/galaxyruler/galactic-skills/ux-engineering.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 5.1 | $0.00088 | $0.01265 |
| Opus 5 | $0.00044 | $0.00633 |
| Sonnet 5 | $0.00018 | $0.00253 |
| Haiku 4.5 | $0.00009 | $0.00127 |
Grade A, and why
ux-engineering 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 yesterday.
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 — 77 lines — stays where its author put it; the contents beside it link to each section on GitHub.
UX Engineering & Product Design
Authoritative, empirical, and standards-based methodology for architecting, designing, testing, and deploying digital experiences.
For UI testing execution (visual regression, responsive, a11y automation), use test-ui. For UX testing execution (heuristic eval, cognitive walkthroughs, SUS), use test-ux. This skill is the strategic methodology layer that informs those testing runners.
Operational workflow
- Discovery & research — define target market by Job to be Done (JTBD), not demographics. Map the Universal Job Map (Define, Locate, Prepare, Confirm, Execute, Monitor, Modify, Conclude).
- Information architecture — organize via the three circles (Users, Content, Context). Build organization, labeling, navigation, and search systems.
- Design & prototyping — build from foundational design tokens. Map UI components to semantic roles. Apply ISO 9241-110 dialogue principles.
- Accessibility integration — WCAG 2.2 AA via progressive enhancement on all structures.
- Testing & iteration — validate flows via qualitative usability testing with representative users. Execute with
/test-uiand/test-uxskills. - Measurement & optimization — track quality with HEART framework and System Usability Scale (SUS).
JTBD research
- Outcomes, not features. Formula: "When [circumstance], I want to [job], so I can [outcome] without [pain point]".
- Three customer roles: Job Executor, Product Lifecycle Support Team, Buyer.
- Solution-agnostic interviews: ask about workarounds, prior solutions, and anxieties. Ignore your specific software during discovery.
Information architecture
- Clear labeling — no internal jargon; use the user's domain terms.
- Progressive disclosure — hide complexity until requested. Improves "Suitability for Learning".
- Content portability — structure content flexibly for multi-platform delivery (responsive web, mobile, voice).
What ships with it
3 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.
- yesterday Changed · +2 lines · +1 tokens per session 938542f4b0fe
- 8d ago First seen · 75 lines · 87 tokens per session scan A 1c681cbc15e0
ux-engineering is a skill published in the GitHub repository GalaxyRuler/Galactic-skills (5 stars, last pushed 2d ago), licensed MIT. It adds 88 tokens to every session and 1,265 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 2026-08-31.
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