Slopwatch 🤖🔎

“Wait… did a human actually write this, or is it slop?”

Slopwatch is a one-click browser extension that reads the page you’re on and gives you a probabilistic second opinion on whether the text was AI-generated — an overall score, a calibrated label, the model’s reasoning, and paragraph-level highlights you can hover for a per-paragraph rationale.

It is Firefox-first (Chromium second), Manifest V3, and built to be honest about a genuinely hard problem.

What makes it different

• Inert by default. It does nothing — no scanning, no network, no permissions used — until you click the toolbar robot.
• Bring your own model. Plug in an Anthropic key, any OpenAI-compatible endpoint, or a local Ollama model so nothing leaves your machine.
• Never a bare verdict. Score and label and reasoning, together, always — with a permanent Uncertain band that can’t be configured away.
• You can see where your data goes. A persistent indicator tells you, every run, whether analysis ran in the cloud or on your device.

How it works

Click the icon → it grabs temporary read access to the current tab (activeTab, nothing broader) → extracts the primary content (Readability for articles, per-platform extractors for feeds) → sends it to your chosen model → shows an overall AI-likelihood score, a label, the reasoning, and highlights the suspicious paragraphs in place.

A note on what this is — and isn’t

LLM-based “is this AI?” detection is genuinely unreliable, with real false-positive and false-negative rates, and is biased against formal, template-following, or non-native-English writing. Slopwatch is built to make that honest — and it never labels people, only text. See Responsible use.