01Long sentences
Yuki Writer checks the text as you type. It marks a sentence of 20 words or more as hard to read, and one of 30 or more as very hard. When you shorten a sentence below 20 words, its mark disappears.
The footer shows the word count, the reading-ease score and the number of marks of each kind. The score is the Flesch reading ease, from 0 for very difficult to 100 for very easy.
// footer 214 words · Reading ease 62 · standard ● 2 long sentences ● 3 filler words
02Filler words
Yuki Writer looks for 20 words that rarely add meaning in English. It fades them and strikes them through, so you can still read the sentence. Put the caret on one and click Remove on the card. Remove also deletes the space next to the word.
// the full list
actually, basically, really, very, just, quite, rather, simply, literally, totally, definitely, certainly, honestly, essentially, fairly, somewhat, truly, virtually, practically, absolutely03Fix it for me
On the card of a long sentence, click Fix it for me. An OpenAI model rewrites that sentence. Yuki Writer shows the suggestion beside the original and marks the words it removed and added. You keep the original or use the suggestion.
Yuki Writer sends text over the network only when you click Fix it for me, and then only that sentence. The marks come from the rules on this page and run on your Mac. The rewrite needs your own OpenAI API key in OPENAI_API_KEY.
04Markdown
You write in Markdown. The editor shows bold, italic and code with their formatting. Yuki Writer skips the Markdown symbols when it counts words. Press ⌘⇧P to see the rendered text.
05Light and dark
Yuki Writer sets the text in one column of Charter at 19 points and colors the caret blue. It switches between light and dark with macOS. The window at the top of this page uses the app's colors.
06Updates
Yuki Writer downloads new versions in the background and installs them when you restart or quit. After an update, a window lists what changed. You can open it again from the Yuki Writer menu.
07Questions
Which Macs does it run on?
Macs with Apple silicon.
Which languages does it check?
English only. The filler words are English words, and the Flesch formula counts English syllables.
Does my writing leave my Mac?
Only when you click Fix it for me. Yuki Writer then sends that one sentence to OpenAI. Everything else runs on your Mac.
Why is a sentence marked when it reads fine?
The rule counts words and does not judge meaning. Some long sentences are fine as they are. You can leave those marked.
08What's new
0.1.12026-11-01
- Chisel is now Yuki Writer. A new name and a new icon; your writing works as before.
- Yuki Writer updates itself. A new version downloads in the background and goes in when you restart or quit.
- What's new. After an update, this window shows what changed. Open it again from the Yuki Writer menu.
0.1.02026-11-01
- A writing editor that shows where a text is hard to read. Long and very long sentences are highlighted, filler words faded and struck through, and the caret offers a fix.
- Fix it for me. A model rewrites a marked sentence and shows it beside the original.
- Preview. ⌘⇧P shows the Markdown as it will read.
- A quiet look that follows the system's light and dark mode, with the counts in a footer.
