usability-heuristics skillA
usability-heuristics is agent-read markdown (skill) from jnpiyush/agentx: Score a UX prototype or shipped UI against Nielsen-10 heuristics with a severity rubric. Use when reviewing a design, running prototype-auditor Pass 7, or producing a heuristic evaluation report. Mechanically maps each heuristic to inspection prompts, severity (0-4), and fix patterns so two reviewers reach the same score..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# Usability Heuristics > WHEN: A prototype, page, or flow needs an evidence-based usability check beyond accessibility and visual polish. This skill is the canonical Frontier heuristic-evaluation procedure consumed by `prototype-audit` Pass 7. ## When to Use This Skill - Before declaring a prototype review-ready - During the prototype-auditor Pass 7 - When a stakeholder asks "is this actually usable?" - When choosing between two layouts to ship Not a replacement for user testing. It is a structured expert inspection that catches the obvious failures before they reach users. ## Authoritative Sources | Source | What it covers | |--------|----------------| | Nielsen Norman Group, 10 Usability Heuristics (1994, updated) | Heuristic definitions | | Jakob Nielsen, Severity Ratings for Usability Problems | 0-4 severity scale | | Bruce Tognazzini, First Principles of Interaction Design | Complementary principles | | Don Norman, The Design of Everyday Things | Affordance, mapping, feedback | | Baymard Institute UX research | Empirical e-commerce / form data | Cite the heuristic by number in every finding so the report is auditable. ## The Ten Heuristics …
Read the whole file at its exact version.
How to install
mdr add jnpiyush/agentx/usability-heuristics@v1.0.0mdr add jnpiyush/agentx/usability-heuristics@sha256:1d47e4e4744c8248Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_bhgvwugvdoyslgig)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.0.0 latest | 2026-09-15 | f17c505 | 8,497 B | A | view · diff |
| v1.0.0 | 2026-05-13 | 173370f | 8,493 B | A | view |
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 (8497 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
jnpiyush/agentx · 16 stars · license Apache-2.0 · pushed 2026-09-21 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_bhgvwugvdoyslgig GET https://markdownregistry.com/api/v1/resolve?ref=jnpiyush/agentx/usability-heuristics GET https://markdownregistry.com/api/v1/blob/1d47e4e4744c8248bf4363ed842db7b7eeb54f075906984689424af73b3a1fbf
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