Audits and designs iOS/macOS/watchOS/visionOS interfaces against the Apple Human Interface Guidelines, including the Liquid Glass design language (announced WWDC25, shipped with iOS 26/macOS Tahoe, Sept 2025).
SkillScore87Maintained
Automatic
◆Design & UX Review pack
Last verified 8/4/2026
What it changes
Passed 20 of 23 test cases with the skill, and 18 of 23 without it.
Without skill78%
With skill87%
Checks it passed that the model alone missed
The response reports an audit score of 80 out of 100.
The response specifies using the glassEffect view modifier.
The response states the computed audit score is 70 out of 100.
and 3 more in the full report
4 fixed16 passed either way1 still failing2 broke
Pass-rate lift
+9 pp
Tokens
+38%
Agent turns
0%
Response time
-28%
Model gemini-3.6-flashMeasured 8/4/2026v120 of 23 cases passed with skill
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 4
Prompt
Apple introduced the Liquid Glass translucent design material language across its operating systems. In which WWDC year and OS generation release (e.g., iOS version) was Liquid Glass introduced?
What was checked, without and with the skill
Checked
Without skill
With skill
The response identifies WWDC25 as the announcement event for Liquid Glass.
Missed
Passed
The response specifies iOS 26 as an operating system version where Liquid Glass shipped.
Missed
Passed
case-15 · gemini-3.6-flash · 8/4/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md97 linessingle file
Apple HIG Expert
Design and audit apps against the Apple Human Interface Guidelines (HIG, developer.apple.com/design/human-interface-guidelines), including the Liquid Glass design language. HIG content evolves with each OS release — when a claim matters, verify against the live HIG pages cited in references/.
Before Starting
If product-context.md or ios-design-context.md exists, read it before asking questions. Then gather:
Platform target: iOS, macOS, watchOS, or visionOS?
Current state: new design or auditing an existing mockup/code?
App category: utility, productivity, game, social, etc.
Modes
Mode 1 — Design from scratch: pick the platform navigation paradigm and layout primitives first (see references/platform-specifics.md), then apply typography and semantic color (references/visual-design.md).
Mode 2 — HIG audit: fill in templates/hig-audit-template.md, run scripts/hig_checker.py on every measurable element, and deliver a scored report (see Worked example below).
The Compliance Tool
scripts/hig_checker.py (stdlib-only) has three subcommands:
# 1. Contrast ratio (WCAG formula; pass >= 4.5:1 for normal text)
python3 scripts/hig_checker.py contrast "#8E8E93" "#FFFFFF"
# -> Contrast Ratio: 3.26 [FAILED]
# 2. Tap-target size (pass >= 44x44 pt per HIG)
python3 scripts/hig_checker.py target 32 32
# -> Tap Target: 32x32 [FAILED]
# 3. Batch audit from JSON -> scorecard (starts at 100, -10 per violation)
python3 scripts/hig_checker.py batch audit.json