Train a ChatGPT Writing Skill on Your Old Posts to Kill the AI Voice

From September 17–18, @TawohAwa posted a thread sharing a five-step workflow for training a ChatGPT writing Skill on your own past writing, with the goal of making AI output genuinely match your personal voice and shake off the AI-slop tone.

Confirmed

• Step one is gathering style material: the author argues that prompts like "Write like a Human" or "Humanise this" only produce AI slop, and recommends finding 10–30 emails, posts, articles, newsletters, or reports written before November 2022 (pre-ChatGPT) for ChatGPT to analyze your personal style.
• Step two builds an AI-tone blacklist: use ChatGPT's Deep Research to investigate typical AI writing patterns—high-frequency words, sentence structures, transitions, and punctuation habits—and compile them into an Avoid List.
• Step three builds the Skill: have ChatGPT generate a single writing Skill based on the writing analysis, the Avoid List, and sample files, covering personal voice, writing rules, vocabulary, structure, the Avoid List, examples, editing rules, and a final audit.
• Step four is installation and use: an alternative path is to compile your best posts, emails, and articles into one Markdown file, create a new Skill under ChatGPT → Settings → Skills and upload it, letting ChatGPT distill reusable writing instructions; once installed, invoke it directly, e.g., "MyWritingSkill write…".
• Step five is continuous iteration: when an output sounds like you, add it to approved examples; when you spot a new AI writing pattern, add it to the Avoid List.
• The full pipeline: collect old writing → Deep Research builds the Avoid List → build the Skill → install and use → keep iterating.

Why it matters

• The workflow upgrades "fighting the AI tone" from ad-hoc prompts into a durable, reusable Skill asset, anchoring your real personal style through analysis of past writing rather than generic "humanize" instructions.
• The closed loop—good outputs go into the library, AI tells go into the blacklist—lets the Skill evolve with use, making it a useful reference for writers producing content long-term.

2026-09-17 ~ 2026-09-18 · 6 related posts

• [source] Turn Your Best Writing Into a ChatGPT Skill to Clone Your Style Forever — TawohAwa · 2026-09-17
• [source] Stop asking ChatGPT to "humanise": feed it your pre-2022 writing instead — TawohAwa · 2026-09-18
• Use Deep Research to build an avoid list of AI writing patterns — TawohAwa · 2026-09-18
• Prompt ChatGPT to build a single writing Skill from your voice analysis — TawohAwa · 2026-09-18
• Turn your own writing into a ChatGPT Skill and ditch AI slop — TawohAwa · 2026-09-18
• [source] Keep iterating your writing Skill: approve good outputs, expand the avoid list — TawohAwa · 2026-09-18