product-ux-expert SKILL.md skillA
product-ux-expert from majiayu000/spellbook is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add majiayu000/spellbook/product-ux-expert@git:20251218.158e7e4Pins git:20251218.158e7e4 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- majiayu000/spellbook
- Path
skills/product-ux-expert/SKILL.md- Versions recorded
- 1
- Latest version
- git:20251218.158e7e4, committed Dec 18, 2025
- Size
- 14,032 bytes
- Repository stars
- 290
- License
- MIT
Product interaction and UX expert. Use when reviewing UI/UX, conducting heuristic evaluations, designing user journeys, applying cognitive psychology principles, or ensuring WCAG 2.2 accessibility compliance.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Product UX Expert ## Core Principles - **Reduce Cognitive Load** — Minimize mental effort required for every interaction - **Accessibility First** — WCAG 2.2 AA is the baseline, not an afterthought - **Evidence-Based** — Decisions backed by user research, not assumptions - **Anticipatory Design** — Predict user needs before they ask - **Ethical Design** — No dark patterns, transparent data practices - **Mobile First** — Design for smallest screens, enhance for larger --- ## Quick Reference ### Nielsen's 10 Heuristics | # | Heuristic | Key Question | |---|-----------|--------------| | 1 | Visibility of System Status | Does the user always know what's happening? | | 2 | Match System & Real World | Does it use familiar language and concepts? | | 3 | User Control & Freedom | Can users easily undo or exit? | | 4 | Consistency & Standards | Does it follow platform conventions? | | 5 | Error Prevention | Does it prevent errors before they occur? | | 6 | Recognition over Recall | Is information visible, not memorized? | | 7 | Flexibility & Efficiency | Are there shortcuts for experts? | | 8 | Aesthetic & Minimalist Design | Is every element necessary? | …
Read the whole file at its exact version.
How to install
mdr add majiayu000/spellbook/product-ux-expert@sha256:d3e0b940dd713216The line at the top of this page pins the label git:20251218.158e7e4, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_jivxesewk55bfi4e)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Dec 18, 2025.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (14032 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
majiayu000/spellbook · 290 stars · license MIT · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_jivxesewk55bfi4e GET https://markdownregistry.com/api/v1/resolve?ref=majiayu000/spellbook/product-ux-expert GET https://markdownregistry.com/api/v1/blob/d3e0b940dd71321660d9ce76a261b9f59951b8e61c0de1c539879ed489ee1daf
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.