A Chrome extension that silently captures your ChatGPT / Claude / Gemini / Perplexity / Grok conversations and stores them as private, locally-indexed semantic memories — with a one-click Recall button to inject relevant context back into new chats.

100% local. No cloud. No server. No account required.

Demo

https://github.com/user-attachments/assets/d2aef66f-30b0-459c-8a92-64b8f5617bf6

Installation

For Users — Chrome Web Store

Install directly from the Chrome Web Store.

Note: The Chrome Web Store version may lag behind the latest release. For the newest features, download the latest .zip from the Releases page and load it manually (see below).

Manual Install from Release

1. Go to the Releases page and download the latest .zip
2. Unzip the file
3. Open Chrome → chrome://extensions/
4. Toggle Developer mode on (top-right)
5. Click Load unpacked → select the unzipped folder

For Developers — Build from Source

Requirements: Node.js 18+, pnpm (npm install -g pnpm), Chrome / Edge (MV3)

# Fork this repository to your own GitHub account
git clone https://github.com/<your-github-username>/personal-ai-memory.git
cd personal-ai-memory
pnpm install

# Development mode — auto-rebuilds on every save
pnpm dev

Then load build/chrome-mv3-dev/ via Load unpacked in chrome://extensions/.

# Production build
pnpm build
# output: build/chrome-mv3-prod/

After any code change: click Reload on the AI Memory card, then refresh open AI tabs.

Features at a Glance

Supported platforms: ChatGPT (chat.openai.com / chatgpt.com) · Gemini (gemini.google.com) · Claude (claude.ai) · Perplexity (perplexity.ai) · Grok (grok.com)

How It Works

You chat on ChatGPT / Claude / Gemini / Perplexity / Grok
        │  (extension captures silently in background)
        ▼
Memories stored locally in IndexedDB
+ semantic embedding vector (ONNX, runs in browser)
+ keyword index (MiniSearch / BM25, in Service Worker memory)
        │
        │  Later — you start a new chat
        ▼
Click 🧠 Recall next to the input box on any supported AI site
        │
        ▼
Hybrid search:
  Route A — vector similarity × time-decay (recent = higher weight)
  Route B — BM25 keyword search (prefix matching)
  Fusion  — Reciprocal Rank Fusion (RRF)
        │
        ▼
Top-k memories injected as RAG context into the input box
AI now has your history as background knowledge

Search Algorithm (detail)

Route A — Vector Search + Time-Decay
  query → Float32Array embedding (ONNX, Offscreen Document)
  for each record: dot_product(q, r.embedding) × exp(-0.01 × daysOld)
  group by parentId → keep max decayed score per group
  sort descending → vectorRanked[]
  (half-life ≈ 69 days, λ = 0.01)

Route B — Keyword search (MiniSearch / BM25)
  miniSearch.search(query, { prefix: true })
  prefix matching: "py" finds "python", "react" finds "reactivity"
  sort by BM25 score → kwRanked[]

Fusion — Reciprocal Rank Fusion (RRF, k = 60)
  rrfScore[key] += 1 / (60 + rank)  for each list
  sum both lists → sort desc → top-k → merge chunks → SearchResult[]

Fallback: if embedding fails, keyword-only results are returned; if no keyword matches, vector-only results are returned.

How to Export Chat History?

ChatGPT

1. Log in to your ChatGPT account and go to the main screen.
2. Click your profile picture or name in the corner to open the menu.
3. Select Settings.
4. Go to the Data controls tab.
5. Find Export data and click Export.
6. Click Confirm export in the confirmation window.
7. You will receive an email with a download link (may take up to 24 hours).
8. Download the ZIP file. After extracting, the chat history file is conversations-00x.json.

Gemini

Export via Google Takeout:

1. Go to Google Takeout and sign in.
2. Click Deselect all at the top.
3. Scroll down and check My Activity (NOT Gemini Apps).
4. Click Multiple formats below that section.
5. Change the first activity format from HTML to JSON, click OK.
6. Click Next step → choose delivery method → Create export.
7. Wait for the email. After extracting, the file is my activity.json.

Claude

1. Go to https://claude.ai/settings/data-privacy-controls.
2. Click Export data.
3. Wait for the email with the download link.
4. After extracting, the chat history file is conversations.json.

Perplexity

Perplexity does not support user data export. Each conversation must be visited individually to be captured by the extension.

Grok

1. Go to https://grok.com.
2. Click your profile picture (bottom-left) → Settings → Data controls.
3. Click Export Account Data.
4. Wait several hours for the download link email.
5. After extracting, the file is prod-grok-backend.json.

Privacy & Security

This extension intercepts your AI conversations. Here is exactly what it does and does not do:

Treat this extension like a local diary. It sees everything you type and receive on supported AI sites. Review the source code if you have concerns.

Tech Stack

src/
├── background/
│   ├── index.ts               Message router · capture handler · MiniSearch sync
│   ├── search.ts              Hybrid search engine (vector × decay + BM25 + RRF)
│   ├── db.ts                  IndexedDB (Dexie) operations
│   ├── embedding.ts           ONNX model name / version constants
│   ├── injector.ts            MAIN-world fetch/XHR interceptor (injected into page)
│   ├── chunking.ts            Text chunking (500-char segments, 75-char overlap)
│   ├── domSync.ts             DOM-based conversation sync
│   ├── offscreen.ts           Offscreen document message handler
│   ├── perplexityBgFetch.ts   Perplexity background fetch helper
│   ├── syncEmbeddings.ts      Embedding sync utilities
│   └── adapters/
│       ├── chatgpt.ts         ChatGPT SSE delta-v1 parser
│       ├── claude.ts          Claude SSE parser
│       ├── gemini.ts          Gemini XHR StreamGenerate parser + passive capture
│       ├── perplexity.ts      Perplexity SSE parser
│       └── grok.ts            Grok SSE parser
├── contents/
│   ├── interceptor.ts         ISOLATED-world bridge + <title> MutationObserver
│   ├── memory-float-ui.tsx    Floating panel content script entry point
│   ├── chatgpt-injector.tsx   ChatGPT Recall button + RAG prompt
│   ├── claude-injector.tsx    Claude Recall button
│   ├── gemini-injector.tsx    Gemini passive capture + Recall button
│   ├── grok-injector.tsx      Grok Recall button
│   └── perplexity-injector.tsx Perplexity Recall button
├── importers/
│   ├── base.ts                Base importer interface
│   ├── chatgptConversations.ts ChatGPT JSON importer
│   ├── claudeConversations.ts  Claude JSON importer
│   ├── geminiTakeout.ts       Gemini Takeout importer
│   ├── grokConversations.ts   Grok JSON importer
│   └── index.ts               Importer registry
├── tabs/
│   └── offscreen.tsx          ONNX inference (Offscreen Document — needs DOM)
├── popup/
│   ├── index.tsx              Popup root — sliding panel navigation
│   └── components/
│       ├── FloatingMemoryPanel.tsx Draggable floating panel (logo + panel)
│       ├── MemoryMenuContent.tsx   Memory menu content (sidebar / popup)
│       ├── MemoryTableView.tsx Memory list grouped by session
│       ├── ImportView.tsx     JSON import UI
│       ├── ExportView.tsx     JSON export UI
│       ├── FavoritePromptsSection.tsx Trie autocomplete prompts
│       └── FolderView.tsx     Drag-and-drop folder management
├── utils/
│   ├── chrome-storage.ts      Shared chrome.storage.local helpers (load/save/subscribe)
│   ├── rag.ts                 RAG prompt formatting
│   ├── recall-button.ts       Recall button creation and injection
│   ├── recall-helpers.ts      Shared recall utilities
│   ├── trie.ts                Trie data structure for autocomplete
│   ├── message-passing.ts     Type-safe Chrome message passing
│   └── onboarding-highlight.ts Onboarding step highlight helpers
├── i18n/
│   ├── translations.ts        8-language string map
│   ├── LanguageContext.tsx    Language switching (chrome.storage — syncs across tabs)
│   ├── ThemeContext.tsx       Dark/light theme (chrome.storage — syncs across tabs)
│   └── lang-storage.ts        Language persistence helpers
└── types/
    ├── memory.ts              MemoryRecord · SearchResult interfaces
    └── messages.ts            All Chrome message type definitions

Debugging & Testing

pnpm test              # Unit tests (Vitest)
pnpm test:integration  # Integration tests
pnpm test:e2e          # E2E tests (Playwright — run pnpm build first)

Changelog

See CHANGELOG.md for the full version history.

Contributing

PRs and issues are welcome! Please open an issue to discuss significant changes before submitting a PR.

• Bug reports: open an issue
• Feature requests: open an issue

License

Apache 2.0