$ easy.txt hard.md --max-grade 8
[exit 1]
--- stdout
easy.txt  ·  Grade 0, easy to read
  PASS  grade 0.0 is within --max-grade 8

  No flagged sentences or words.
  mean of ARI 0.0, FK 0.0, Fog 2.1 · 3 sentences

hard.md  ·  Grade 35, very hard to read
  FAIL  grade 34.6 is above --max-grade 8

  1 very hard sentence · 1 adverb
  mean of ARI 35.7, FK 32.1, Fog 36.0 · 1 sentence

  1:1    very hard  grade 18+ "The multifaceted implementation demonstrates c…"
  1:151  adverb     'consistently'

Tips
  very hard  Split the sentence or cut words. Aim for one idea per sentence.
  adverb     Cut the adverb or use a stronger verb.

Checked 2 files: 1 passed, 1 failed (--max-grade 8).
Hardest: hard.md (grade 34.6).
--- stderr

