Tech entrepreneur Siqi Chen released an open-source plugin called Humanizer on Saturday, designed to mitigate the tell-tale signs of AI-generated text in Anthropic's Claude Code AI assistant. The plugin, available on GitHub, instructs the AI model to avoid 24 language and formatting patterns identified by Wikipedia editors as indicators of chatbot-produced content.
The Humanizer plugin leverages a guide compiled by WikiProject AI Cleanup, a group of Wikipedia volunteers dedicated to identifying and flagging AI-generated articles since late 2023. Founded by French Wikipedia editor Ilyas Lebleu, the project has tagged over 500 articles for review and published a formal list of frequently observed patterns in August 2025. These patterns, now integrated into Chen's plugin, range from specific phrasing tendencies to characteristic formatting quirks often found in AI-generated text.
Chen highlighted the significance of Wikipedia's work in a post on X, stating, "It's really handy that Wikipedia went and collated a detailed list of signs of AI writing. So much so that you can just tell your LLM to not do that." The plugin itself is a skill file for Claude Code, Anthropic's terminal-based coding assistant, and consists of a Markdown-formatted file.
The rise of generative AI has presented challenges in content verification, with AI-generated text sometimes difficult to distinguish from human-written material. This has led to concerns about the potential for misinformation and the erosion of trust in online information sources. Wikipedia, as a collaborative encyclopedia, has been particularly vulnerable, prompting the creation of WikiProject AI Cleanup to combat the influx of AI-generated articles.
The development of tools like Humanizer reflects a growing effort to address these challenges by making AI outputs more transparent and less deceptive. By identifying and mitigating the stylistic markers of AI-generated text, developers hope to foster greater accountability and encourage the responsible use of AI technology. As of Monday, the Humanizer plugin had garnered over 1,600 stars on GitHub, indicating significant interest and adoption within the developer community. The long-term impact of such tools on the evolving landscape of AI-generated content remains to be seen.
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