DEJA — LinkedIn & X Duplicate Post Filter

Stop scrolling the same LinkedIn & X posts. DEJA marks duplicates, echoes & spam templates — private, local, free.

DEJA is a free Chrome extension that cleans up LinkedIn and X (Twitter) feeds by marking posts you've already seen — plus near-duplicates and engagement-template spam. THE PROBLEM Your feed repeats. The same "I turned down $X" LinkedIn post. The same engagement bait on X. Rewritten clones of yesterday's take. You waste attention re-reading loops. WHAT DEJA DOES As you scroll LinkedIn or X, DEJA builds a private, on-device memory of posts and quietly marks: • SEEN — exact or near-exact match to something you already scrolled • ECHO — paraphrased near-duplicate (simhash + token overlap) • PATTERN — structural engagement templates that keep recycling WHY INSTALL DEJA • Local by default — fingerprints stay in chrome.storage.local on your device • No account and no DEJA servers • Not another ChatGPT sidebar • Not a moralizing "AI detector" with fake confidence scores • Feed-only — ignores profile sections (experience, honors, interests) • Free forever for the core filter HOW IT WORKS 1. Exact match after normalizing links and mentions 2. 64-bit simhash near-duplicate detection 3. Token overlap for paraphrases 4. Template skeleton matching for engagement-bait families 5. Optional: bring your own API key for smarter semantic echoes (off by default) PRIVACY • Consent before scanning • Clear memory anytime from the popup • Data only powers the marks you see — never sold for ads GET STARTED 1. Install DEJA 2. Click "begin" in the popup 3. Open linkedin.com/feed or x.com/home 4. Hard-refresh the page (Cmd+Shift+R / Ctrl+Shift+R) 5. Scroll — memory builds as you go; marks appear when loops return Website: https://ayaanrustagi.github.io/deja/ Privacy: https://ayaanrustagi.github.io/deja/privacy.html Source: https://github.com/ayaanrustagi/deja