ISO 24495 Skill: Plain Language Standard for Claude Code

Repositorydanyuchn/iso-24495-skillTool

A Claude Code skill that rewrites text into plain language based on the international standard ISO 24495-1:2023. It provides bilingual support for English and Traditional Chinese, guided by four core reader-outcome principles: relevant, findable, understandable, and usable.

Key points

  1. Implements the structural requirements of ISO 24495-1:2023 instead of relying on generic 'write plainly' prompts.
  2. Focuses on four reader outcomes: content relevance, structural findability, wording understandability, and practical usability.
  3. Features a dedicated technique layer for Traditional Chinese that tackles specific linguistic issues such as bureaucratic register, Europeanised sentence structures, and passive voice misuse.
  4. Preserves facts, numerical data, and honest hedges; retains precision when plain phrasing would risk ambiguity and highlights the trade-off.
  5. Built as an agent skill consisting of a shared SKILL.md definition and language-specific reference files.

Why it matters

Standardised plain language is crucial for clear technical documentation, public communications, and accessibility. By translating ISO 24495-1 into executable Claude Code instructions, this skill provides a reliable, repeatable framework that prevents generative AI from simply shortening sentences at the cost of semantic accuracy.

Analysis

The project solves the inconsistency of ad-hoc prompt engineering by structuring professional editing rules into an agent skill. It relies purely on Markdown-based skill specifications compatible with Claude Code. With 139 stars, 5 forks, and an MIT licence, it represents a well-designed, focused open-source utility that serves technical writers, international teams, and developers needing compliant documentation in English and Traditional Chinese.

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Summary generated by AI (Gemini 3.8 Flash, 27 September 2026). It may contain errors – the original source is authoritative.

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