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Humanizer: The FREE Claude Skill That Fixes AI Writing Slop (Plus the Step Everyone Misses)

Published
Aug 3, 2026
Duration
10:28
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Humanizer is an editing skill for prose that sounds machine-made. It targets patterns such as inflated importance, repetitive conclusions, forced three-part lists, excessive headings, and overused punctuation. It does not verify facts, repair weak research, or invent a credible personal voice.

Before you start

Use an agent that supports local skills and confirm that Humanizer is available in its skill list. Keep an untouched copy of the draft. If the text contains research, open the cited sources before editing so you can catch any change in meaning.

Humanizer skill instructions shown in the source video
The Humanizer skill shown in the source video at 00:50. The skill is based on Wikipedia’s catalogue of common AI-writing signs.

The safe workflow

1. Give the agent the complete draft

Do not paste isolated paragraphs if their claims depend on surrounding context. Tell the agent which material must remain unchanged.

Edit this draft with the Humanizer skill.

Preserve every fact, number, date, link, quotation, code block, and source attribution.
Do not add new claims. Keep the current structure unless a heading is redundant.
Return the revised draft and a short list of any factual ambiguity you found.

2. Review meaning before style

Compare the two versions line by line where the stakes are high. Check names, dates, quantities, qualifications, and words such as “may,” “reported,” or “confirmed.” A smoother sentence is worse if it turns a qualified statement into a certainty.

3. Add a real voice sample

Humanizer can remove generic habits, but the result may still sound neutral. Supply a short passage you actually wrote and ask the agent to match its sentence length, directness, and level of formality. Do not ask it to invent personal anecdotes or opinions.

Use the sample below only as a voice reference. Do not copy its facts or phrases.
Keep this draft direct, conversational, and specific. Avoid sales language.

[PASTE 200 TO 500 WORDS YOU WROTE]
Before and after Humanizer comparison from the source video
The source video compares the original and edited copy at 07:20. The useful test is whether the revision is clearer without changing the meaning.

What to check before publishing

  • The opening answers the reader’s question without a warm-up paragraph.
  • Every factual claim still has the same scope and source.
  • Paragraphs do not repeat the heading or the previous paragraph.
  • Lists exist because the items are useful, not because three items sound complete.
  • The draft does not claim that ordinary features are “transformative” or “important” without evidence.
  • Quotations, links, code, and frontmatter remain intact.
  • The final voice sounds like the named author, not a generic assistant.

Troubleshooting

ProblemFix
The revision drops a fact or linkRestore it from the original and rerun with an explicit preservation list.
The prose is shorter but still genericAdd a real writing sample and name the traits to match.
Every paragraph has the same rhythmAsk for sentence-length variation, then review the draft manually.
The agent adds new opinionsRemove them and state that no new claims or interpretations are allowed.
The result sounds less preciseKeep the original wording where precision matters more than smoothness.

When not to use it

Do not use Humanizer to disguise plagiarism, evade authorship rules, or make unsupported claims sound natural. For research, legal, medical, or financial material, validate the evidence first and treat the style pass as the final edit.

Source video

Official documentation