An experimental Chrome extension that reimagines LinkedIn messaging with a keyboard-driven, local-first UI. Built as a personal project to explore browser extension development with React, IndexedDB, and real-time streaming.

• Send, receive, edit, and unsend messages with file attachments
• Optimistic sending with instant UI updates; offline actions queue and replay when back online
• Emoji reactions, read receipts, shared-post previews, and draft auto-save
• Reply to a specific message, with reply-to indicators and edited-message timestamps
• Emoji shortcode autocomplete (:smile) and paste-to-attach for images
• New conversation composer with typeahead recipient search

• Reply suggestions for incoming messages
• Inline autocomplete while composing
• Bring your own Gemini API key (set it in the app); off until configured
• Privacy note: when enabled, message text and participant names from the active conversation are sent to Google's Gemini API to generate suggestions. See Google's Gemini API terms. AI features are off until you add a key.

• Four tabs: Focused, Other, Archived, Spam
• Star, archive, move to Other, mark read/unread, mark as spam, delete
• One-click unread quick-filter toggle
• Undo for destructive actions
• Per-account IndexedDB (supports multiple LinkedIn accounts)

• Real-time local filtering across names, messages, and metadata
• Server-side LinkedIn search with pagination
• Filter autocomplete with Tab/Enter completion

• 30-second background polling with SSE real-time updates
• Multi-category discovery (Focused, Other, Archived, Spam)
• Priority-based message backfill with configurable depth
• Scroll-triggered burst discovery and idle prefetch
• Pause / resume controls

• Grouped message bubbles with time separators
• Emoji reactions and read-receipt indicators
• Image lightbox, file downloads, audio/video attachments
• Light / dark / system theme

• Real-time sync progress and error logs
• Diagnostic API report
• Database stats and reset controls
• Configurable backfill window

This project is not affiliated with, endorsed by, or associated with LinkedIn or Microsoft.

This extension uses LinkedIn's undocumented internal APIs to read and send messages through your existing browser session. This may violate LinkedIn's User Agreement and could result in account restrictions.

This software is provided as-is for personal and educational use only. The author assumes no responsibility for any consequences of using it, including account suspension or data loss. Use at your own risk.

You need Google Chrome or any Chromium-based browser (Edge, Arc, Brave, etc.). There are two ways to install — a prebuilt download, or building from source.

1. Go to the latest release and download inflow-<version>-chrome.zip.
2. Unzip it somewhere you'll keep it (the folder is the extension — don't delete it).
3. Open chrome://extensions, enable Developer mode (top right).
4. Click Load unpacked and select the unzipped folder.

Requires Node.js 18+ and npm.

git clone https://github.com/grinich/inflow.git
cd inflow
npm install
npm run build

Then Load unpacked the dist/chrome-mv3 folder at chrome://extensions (with Developer mode on).

1. Sign into LinkedIn in any tab.
2. Click the inflow icon in the toolbar (pin it for easy access).

inflow notifies you in-app when a new release is out — see Updating.

inflow checks GitHub for new releases and shows a banner in the app when one is available — click What's changed to see the release notes. To update, either:

A. Download the latest build — grab inflow-<version>-chrome.zip from the latest release, unzip it, and load the unzipped folder (or replace your existing one) at chrome://extensions.

B. Rebuild from source (if you cloned the repo):

git pull
npm install
npm run build

Then go to chrome://extensions and click the reload button (↻) on the inflow card. Your data is stored locally and is preserved across updates — the extension uses a fixed ID, so reinstalling or moving the folder keeps your conversations and settings.

npm run dev

Starts a dev server with hot reload. The extension auto-reloads in Chrome on save.

The version lives in package.json (WXT reads it for the manifest). To cut a release:

npm version minor   # or patch / major — bumps package.json and creates a vX.Y.Z tag
git push --follow-tags

Pushing the tag triggers .github/workflows/release.yml, which runs the tests, builds the extension, and publishes a GitHub Release with auto-generated notes and the inflow-<version>-chrome.zip attached. Users' apps pick up the new release via the in-app update banner.

The extension ID is pinned by a public key in the manifest. The matching private key (inflow-signing-key.pem) is gitignored and only needed for .crx signing — keep a copy somewhere safe if you ever want it.

Chrome extension (Manifest V3) built with:

• WXT — extension framework
• React 19 — UI
• Dexie / IndexedDB — per-account local storage with live queries
• Zustand — state management
• Tailwind CSS v4 — styling
• SSE — real-time message streaming

MIT