CtrlK
BlogDocsLog inGet started
Tessl Logo

hig-platforms

Apple Human Interface Guidelines for platform-specific design.

44

Quality

44%

Does it follow best practices?

Run evals on this skill

Adds up to 20 points to the overall score

View guide

SecuritybySnyk

Passed

No findings from the security scan

Fix and improve this skill with Tessl

tessl review fix ./plugins/antigravity-bundle-apple-platform-design/skills/hig-platforms/SKILL.md

The canonical home for this skill is hig-platforms in administrakt0r/AI-Agents-Safe-Coding-Skills

SKILL.md
Quality
Evals
Security

Quality

Content

67%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

This is a well-structured design guidelines skill that efficiently organizes platform-specific guidance with a clear reference index and decision framework. Its main weakness is the lack of concrete, executable examples — no code snippets, no sample output, and no specific API references despite mentioning SwiftUI/UIKit/AppKit. The progressive disclosure structure is strong with the reference table, though bundle files couldn't be verified.

Suggestions

Add a concrete example showing the output format — e.g., a sample platform differences table and implementation notes for a real scenario like 'navigation for a music app on iOS vs macOS'.

Include at least one executable SwiftUI code snippet demonstrating a platform-adaptive pattern (e.g., NavigationSplitView on iPad vs TabView on iPhone).

Remove the vacuous 'When to Use' section — it adds no information and wastes tokens.

DimensionReasoningScore

Conciseness

The content is mostly efficient and well-structured. The platform summaries are concise and informative without over-explaining. Minor verbosity in the 'Questions to Ask' and 'When to Use' sections, and the footer/branding line adds no value for Claude. The 'When to Use' section is particularly vacuous.

4 / 5

Actionability

The skill provides a clear decision framework and structured output format, but lacks concrete executable examples. There are no code snippets, specific API calls, or copy-paste ready design specifications. The guidance is directional ('use sidebars and multi-column layouts') rather than specific (e.g., showing SwiftUI code for a sidebar navigation pattern). For a design guidelines skill, this is somewhat expected, but the output format section only describes what to produce without showing an example.

3 / 5

Workflow Clarity

The decision framework provides a clear 5-step sequence for platform design decisions. The 'Questions to Ask' section establishes good information-gathering steps. However, there are no validation checkpoints or feedback loops — e.g., no step to verify designs against HIG compliance or test across platforms. Since this isn't a destructive/batch operation, the lack of validation doesn't cap the score, but the workflow could benefit from a review/verification step.

4 / 5

Progressive Disclosure

Excellent reference index table with clear one-level-deep references to platform-specific files, well-signaled with topic and key content columns. Related skills are clearly listed. However, no bundle files were provided, so we cannot verify the referenced files exist. The skill also references `.claude/apple-design-context.md` without explaining its structure. Minor gap: the 'Related Skills' section references other skills but doesn't clarify their relationship format.

4 / 5

Total

15

/

20

Passed

Description

22%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

This description is extremely terse and lacks both concrete actions and usage triggers. While it references a specific domain (Apple HIG), it fails to explain what the skill does or when Claude should select it. It would be easily overlooked or misapplied in a multi-skill environment.

Suggestions

Add concrete actions describing what the skill does, e.g., 'Provides guidance on layout, typography, navigation patterns, and component usage following Apple Human Interface Guidelines for iOS, macOS, watchOS, and visionOS apps.'

Add an explicit 'Use when...' clause with natural trigger terms, e.g., 'Use when the user asks about Apple design guidelines, HIG, iOS/macOS UI patterns, SwiftUI components, or platform-specific design for Apple platforms.'

Include common synonyms and abbreviations users might use, such as 'HIG', 'iOS design', 'macOS UI', 'Apple design standards', 'SwiftUI layout'.

DimensionReasoningScore

Specificity

The description names the domain ('Apple Human Interface Guidelines') but provides no concrete actions. It doesn't say what the skill actually does—no verbs like 'applies', 'checks', 'generates', or 'recommends'. 'Platform-specific design' is abstract, not an action.

1 / 5

Completeness

There is no clear 'what does this do' (no actions described) and no 'when should Claude use it' clause. Both are missing or extremely vague, with only a topic reference.

1 / 5

Trigger Term Quality

'Apple Human Interface Guidelines' and 'platform-specific design' are relevant keywords, but common synonyms and natural phrases users might say are missing—e.g., 'HIG', 'iOS design', 'macOS UI', 'SwiftUI', 'UIKit', 'Apple design guidelines', 'iPhone app design'.

3 / 5

Distinctiveness Conflict Risk

'Apple Human Interface Guidelines' is a fairly specific domain reference that distinguishes it from generic design skills, but without concrete actions or triggers, it could overlap with other design or UI/UX skills.

3 / 5

Total

8

/

20

Passed

Validation

90%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation10 / 11 Passed

Validation for skill structure

CriteriaDescriptionResult

frontmatter_unknown_keys

Unknown frontmatter key(s) found; consider removing or moving to metadata

Warning

Total

10

/

11

Passed

Repository
administrakt0r/AI-Agents-Safe-Coding-Skills
Reviewed

Table of Contents

Is this your skill?

If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.