Automatically detecting AI text in my browser
The author developed a Chrome extension named Deckard that uses local AI models to automatically detect AI-generated text on websites. While these local models have lower accuracy than the commercial service Pangram, they offer a privacy-preserving alternative that avoids sending user data to third parties. The tool is currently functional and lightweight, with the expectation that future improvements in local model capabilities will significantly enhance its detection performance.
- ▪Deckard is a Chrome extension that runs a local AI model on the user's Mac to scan web content for AI-generated text.
- ▪Benchmarking showed that small local models have detection rates between 19% and 56%, which is significantly lower than Pangram's 99.66% accuracy.
- ▪The extension utilizes native messaging to communicate with the local model, consuming between 400MB and 1.2GB of memory while active.
- ▪The author argues that local detection is preferable to third-party services like Pangram to maintain user privacy and avoid data transmission costs.
- ▪Deckard automatically deactivates after five minutes of inactivity to conserve system resources and battery life.
Hacker News (AI / LLM) files mainly under ai. We currently carry 6,218 of its stories.
Story provenance
Source · retrieval · rights · ranking — open for full record
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Story provenance
Attribution is not the same as permission. This drawer separates discovery metadata, excerpts, WeSearch-generated summaries, reuse status, and whether the publisher receives the visit. Nothing here claims a legal grant the publisher has not made.
Record
| Original publisher | Seangoedecke |
| Canonical URL | https://www.seangoedecke.com/deckard/ |
| Publication time | Thu, 24 Sep 2026 02:31:32 +0000 |
| Retrieval time | 2026-09-24T02:40:09.419Z |
| Last seen | 2026-09-24T02:40:09.419Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | fC4J1mL0_fpc · 1 stories |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
Automatically detecting AI text in my browserAutomated AI text detection is currently an underserved niche. The only game in town is Pangram, which does an excellent job but desperately needs more competition. In a few years, I would be surprised if every major social network doesn’t scan new posts1 and comments for AI content in order to tag them (or simply remove them). I like that I can rely on Pangram to confirm my suspicions when I read something that sounds like AI. But it’d be much better if I could choose to avoid AI-generated text in the first place. What I want is something that runs in the background and automatically scans text on websites I visit, without me having to ask for it.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Seangoedecke.
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