Healthcare-grounded editorial standards for product writing — voice, tone, language, microcopy patterns, and safety-critical copy.
Treat the reader's time as more valuable than your own.
- editorial-policy.md — voice, tone, language rules, healthcare content standards, audience adaptation.
- ui-writing-spec.md — how text behaves inside interface components: buttons, errors, banners, forms, multi-step flows, dates, numbers, bulk operations, loading states, message severity, data freshness.
- working-with-ai.md — how writers and AI tools should apply both documents.
- skills/cthesigns-editorial.md — Claude Code skill that loads the docs and applies the rules.
UX writers, product designers, clinicians who write copy, and engineers who write UI strings — particularly in healthcare or clinical contexts.
The principles are universal; the examples are healthcare-grounded. Adapt the cancer, risk, and clinical workflow guidance to your own domain if you fork.
- Marketing copy, brand voice work, or long-form content writing — the rules are tuned for product interfaces.
- Teams looking for a fork-and-replace template. This is opinionated. For a generic content design framework, see GOV.UK Content Design or the 18F Content Guide.
Copy skills/cthesigns-editorial.md to your .claude/skills/ directory. Claude Code will load the skill automatically.
When the skill is active, ask Claude to draft, review, or refine UX copy and it will read the docs and apply the rules.
Releases use CalVer (YYYY.MM.PATCH). The current release is tagged in the Releases tab. Pin to a specific tag for stable references in your own work — the docs evolve.
Originally drafted by the C the Signs design team. C the Signs is an AI-powered clinical decision support platform for early cancer detection, built across the NHS and US healthcare markets.
CC BY 4.0. Use freely, adapt, redistribute. Attribution required.
This repo includes guidance on cancer language, algorithm output, and clinical safety copy. Apply that guidance to your own product only with qualified clinical review. CC BY 4.0 carries no warranty; nothing here is medical or regulatory advice.