readability
Analyze text readability with Flesch-Kincaid, Gunning Fog, SMOG, and other metrics. Returns objective scores with interpretation and recommendations.
- Installs
- 576
- Last 24h
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- Security
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/humanizerai/agent-skills --skill readability- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads readability automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Analyze Readability
Calculate and display readability metrics for the provided text.
Input
The user provides text in $ARGUMENTS. If no text provided, ask for it.
Metrics to Calculate
Core Scores
| Metric | Formula | Interpretation |
|---|---|---|
| Flesch Reading Ease | 206.835 - 1.015(words/sentences) - 84.6(syllables/words) | 0-100, higher = easier |
| Flesch-Kincaid Grade | 0.39(words/sentences) + 11.8(syllables/words) - 15.59 | US grade level |
| Gunning Fog Index | 0.4[(words/sentences) + 100(complex words/words)] | Years of education |
| SMOG Index | 1.043 × √(complex words × 30/sentences) + 3.1291 | Grade level |
Complex words = 3+ syllables
Text Statistics
- Word count
- Sentence count
- Average sentence length (words)
- Average word length (characters)
- Complex words count and %
- Passive voice sentences (estimate)
Output Format
## Readability Analysis
### Scores
| Metric | Score | Meaning |
|--------|-------|---------|
| Flesch Reading Ease | [X] | [interpretation] |
| Flesch-Kincaid Grade | [X] | [grade level] |
| Gunning Fog | [X] | [years education] |
| SMOG | [X] | [grade level] |
### Statistics
- Words: [X]
- Sentences: [X]
- Avg sentence length: [X] words
- Complex words: [X] ([Y]%)
### Target Audience
[Who can easily read this based on scores]
### Recommendations
1. [Specific suggestion]
2. [Specific suggestion]
3. [Specific suggestion]
Interpretation Guide
| Flesch Score | Grade | Audience |
|---|---|---|
| 90-100 | 5th | Very easy |
| 80-89 | 6th | Easy |
| 70-79 | 7th | Fairly easy |
| 60-69 | 8-9th | Standard |
| 50-59 | 10-12th | Fairly difficult |
| 30-49 | College | Difficult |
| 0-29 | Graduate | Very difficult |
Recommendations
Based on scores, suggest:
- Sentences to shorten (if avg > 20 words)
- Complex words to simplify
- Passive voice to convert to active
- Specific examples of what to fix
FAQ
What does the readability skill do?
Analyze text readability with Flesch-Kincaid, Gunning Fog, SMOG, and other metrics. Returns objective scores with interpretation and recommendations.
How do I install readability?
Run npx skills add https://github.com/humanizerai/agent-skills --skill readability in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/readability/ (personal) or .claude/skills/readability/ (project).
Which AI agents can use readability?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is readability safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains readability?
It is published by humanizerai in humanizerai/agent-skills. It has 576 recorded installs.
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