Make Claude Write Like a Human, Not a Robot

AI-generated content has tells. Specific words, sentence patterns, and structural habits that make it obvious. Here’s how to eliminate them.

The Banned Words List

These words appear in AI writing at 10-50x the rate of human writing. Add this to your system prompt or CLAUDE.md:

Never use these words: delve, tapestry, landscape, leverage,
comprehensive, robust, seamless, pivotal, intricate,
multifaceted, cutting-edge, groundbreaking, revolutionary,
transformative, foster, harness, navigate, underscore,
testament, realm, utilize, empower, optimize, whilst,
moreover, furthermore, consequently, hence, remarkable,
unprecedented, invaluable, noteworthy, paramount, myriad,
plethora, spearhead, orchestrate

The Banned Phrases

Never use these phrases: "In today's fast-paced world",
"It's important to note", "In conclusion", "Dive into",
"Unlock the potential", "Game-changer",
"Not only...but also...", "I hope this helps",
"Feel free to reach out", "At the forefront of"

Style Rules That Make the Biggest Difference

Use contractions. “Don’t” not “do not.” This single change makes the biggest impact.

Vary sentence length. AI writes sentences that are all roughly the same length. Mix short punches with longer ones.

Kill the em dashes. Claude overuses them. Use commas, parentheses, or periods instead.

Write in first/second person. Say “you” and “I”, not “one” or “the user.”

Skip the intro and conclusion. No “In this article, we will explore…” and no “In conclusion…” Just start with the interesting part, and stop when you’re done.

Use simple words. “Use” not “utilize.” “Help” not “facilitate.” “Big” not “substantial.”

Voice Matching

For the most natural results, give Claude samples of your own writing:

Here are 3 examples of my writing style: [paste samples]
Analyze the tone, sentence structure, and vocabulary.
Write all future content matching this exact style.

The Full System Prompt

Combine everything into your CLAUDE.md or system prompt. The Boxes page has a complete “Writing & Content” box you can copy with the humanizer skill, banned words, and an editorial reviewer agent built in.