Individual skill
accessibility-understandable
Use this skill when the question is whether users can *understand* the UI — predict its behavior, recover from errors, comprehend its labels and copy. Trigger when writing form labels and error messages, when designing flows with surprising state changes, when picking microcopy for the destructive moments, or when reviewing a UI that "works correctly but confuses people." Covers WCAG Principle 3 (Understandable). Sub-aspect of `accessibility`; read that first if you haven't already.
plugins/HDeibler/universal-design-principles/plugins/process-and-robustness-principles/skills/accessibility-understandable/SKILL.md
Source commit d780783eba4ecc7c8b9429f95c9362df95f07c61
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- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- Yes
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Network or broad shell
- Last checked
- Nov 4, 2026
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Repository context
- Repository stars (not skill ratings)
- 1,532
- Repository last updated
- Nov 6, 2026
- License
- Apache-2.0
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
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SKILL.mdcore · 12,292 bytesreferences/understandable-deep-dive.mddoc · 4,593 bytes
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# Accessibility — Understandable
WCAG Principle 3: information and the operation of the user interface must be understandable.
The three sub-criteria, simplified:
1. **Readable** — language is identified, jargon is explained, abbreviations are expanded.
2. **Predictable** — the UI behaves consistently and changes context only when the user expects.
3. **Input assistance** — labels, instructions, error messages, and prevention of mistakes.
This sub-principle is where accessibility most overlaps with general usability — but the consequences fall hardest on users with cognitive impairments, learning disabilities, low literacy, or unfamiliarity with the language.
## 1. Readable
