Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add Owl-Listener/inclusive-design-skills --skill plain-language-designgit clone --depth 1 https://github.com/Owl-Listener/inclusive-design-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/owl-listener/inclusive-design-skills/plain-language-design)<a href="https://agentmods.dev/skills/owl-listener/inclusive-design-skills/plain-language-design"><img src="https://agentmods.dev/badge/skills/owl-listener/inclusive-design-skills/plain-language-design/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/owl-listener/inclusive-design-skills/plain-language-design"><img src="https://agentmods.dev/badge/skills/owl-listener/inclusive-design-skills/plain-language-design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00080 | $0.00590 |
| Opus 5 | $0.00040 | $0.00295 |
| Sonnet 5 | $0.00016 | $0.00118 |
| Haiku 4.5 | $0.00008 | $0.00059 |
Grade A, and why
plain-language-design scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Plain Language Design
Write and evaluate content so that people with cognitive disabilities, low literacy, non-native language skills, or high stress can understand it on the first read.
Plain language is not dumbed-down language. It is clear language. It respects the reader's time and cognitive resources.
The Tests
5-Second Test
Can someone read this sentence and understand it in 5 seconds? If not, rewrite.
Jargon Test
Would someone outside your industry understand every word? If not, replace the word or define it inline.
Action Test
For any instruction or button: is the next step completely unambiguous? "Save and continue" beats "Next". "Delete this item" beats "Remove".
Passive Voice Test
Passive voice hides who does what. "Your application has been rejected" → "We could not approve your application. Here's what to do next."
Sentence Length Test
- Aim for 15–20 words per sentence maximum
- One idea per sentence
- One instruction per paragraph
Common Replacements
| Instead of | Use |
|---|---|
| utilise | use |
| facilitate | help |
| implement | set up / start |
| terminate | end / stop |
| prior to | before |
| in order to | to |
| at this point in time | now |
| in the event that | if |
| with regard to | about |
| commence | start |
| sufficient | enough |
| subsequent | next |
| indicate | show / tell |
| modify | change |
Readability Benchmarks
- General public: grade 6–8 reading level
- Specialist audience: define terms, short sentences
- Critical content (medical, legal, financial): plain language summary alongside the full text
- Buttons, labels, error messages: grade 4–6 always
How to Review
- Read every piece of text aloud — stumbles reveal complexity
- Check sentence length (count words — flag any over 25)
- Identify jargon, acronyms, and idioms
- Verify every instruction has a clear, single action
- Check that error messages say: what happened + why + what to do
Output Format
When reviewing: present a table of flagged text with the original, the issue, and a rewritten version. When writing: produce plain language content with a note on the target reading level achieved.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 12d ago First seen · 79 lines · 80 tokens per session scan A 26564e0c388d
plain-language-design is a skill published in the GitHub repository Owl-Listener/inclusive-design-skills (98 stars, last pushed 3mo ago), licensed MIT. It adds 80 tokens to every session and 590 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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