✦ X Content Sidekick

A Chrome extension that turns X (Twitter) into a professional brand-building platform. Powered by xAI's Grok, it gives you a persistent sidebar with three modes: intelligent reply assistance, original content creation, and conversational strategy coaching.

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Features

💬 Engage Tab — Smarter Replies

• One-click ✦ Engage button appears on every tweet in your feed
• Loads the tweet into the sidebar with a choice of five engagement modes:
  • 💡 Insight — Add a substantive angle the tweet didn't cover
  • ❓ Question — Ask a genuine, thought-provoking question
  • 🤝 Connect — Build rapport with the author specifically
  • ⚡ Challenge — Respectfully push back with nuance
  • ➕ Expand — Build on their point with a related idea
• Generates 2–5 draft replies tuned to your voice profile
• Edit drafts inline, copy, or one-click populate the X reply composer
• Refine with a custom instruction ("shorter", "add a stat", etc.)

✏️ Create Tab — Original Tweets & Threads

• Describe your topic, pick a format and tone
• Formats: single tweet, 3-tweet thread, 5-tweet thread, question tweet
• Tones: conversational, declarative, curious, contrarian, educational
• "Post on X ↗" copies to clipboard and opens the X composer pre-filled

🧭 Strategy Tab — Content Coach

• Conversational AI chat for content strategy
• Ask about weekly posting plans, hook ideas, draft feedback
• Maintains conversation history across the session
• Quick-start prompts to get going immediately

Your Voice Profile

• Define your professional domain, voice style, and engagement goal
• Optional voice notes ("I prefer questions over declarations")
• Everything flows into every AI prompt — replies and tweets sound like you

Other

• Persistent sidebar with smooth slide-in animation (doesn't disrupt X layout)
• Thread context awareness when viewing tweet detail pages
• Bulk-delete all replies on your profile replies tab
• Image analysis (Vision) for tweets with photos (toggle in settings)

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Prerequisites

• Google Chrome (or any Chromium browser)
• xAI API key from console.x.ai

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Installation

Step 1: Get your xAI API key

1. Visit console.x.ai
2. Log in and go to API Keys
3. Create a new key (starts with xai-)

Step 2: Load the extension

1. Go to chrome://extensions/ in Chrome
2. Enable Developer mode (top-right toggle)
3. Click Load unpacked
4. Select the x-content-sidekick folder

Step 3: Configure

1. Click the extension icon → X Content Sidekick
2. Enter your xAI API key
3. Fill in your Voice Profile:
   • Your name/handle (optional)
   • Professional domain (e.g. "B2B SaaS, AI, product")
   • Voice style and engagement goal
   • Any voice notes about how you write
4. Click Save Settings

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Usage

Engaging on a tweet

1. Browse your X timeline
2. Click ✦ Engage on any tweet → sidebar opens
3. Pick an engagement mode
4. Click Generate Replies
5. Edit inline → Use Reply (auto-fills composer) or Copy

Creating original content

1. Open the sidebar (✦ button, right side of screen)
2. Go to the Create tab
3. Describe your topic, pick format + tone
4. Click Generate Drafts
5. Hit Post on X ↗ — copies to clipboard and opens the composer

Strategy chat

1. Open Strategy tab
2. Ask anything — "what should I post about this week?", "how do I make this hook better?"
3. The AI knows your domain and goals from your voice profile

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Settings

Setting	Description
xAI API Key	Required. Get from console.x.ai
Drafts per request	2–5 options generated at once
Image analysis	Use vision model for tweets with photos
Voice Profile	Name, domain, style, goal, voice notes

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Troubleshooting

✦ Engage button not appearing

• Refresh the X page
• Ensure the extension is enabled in chrome://extensions/

"Extension context lost — please refresh"

• The extension was reloaded while the tab was open
• Just refresh the X tab and it reconnects

API errors

• Check your API key is valid and has credits at console.x.ai
• Open the extension's service worker console in chrome://extensions/ (click "Service Worker") to see the full error

Sidebar not appearing

• Look for the ✦ button on the right edge of the screen (vertically centered)
• If X's layout shifted it, try zooming out slightly

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File Structure

x-content-sidekick/
├── manifest.json       # Extension config (v2.0.0, MV3)
├── content.js          # Sidebar, per-tweet buttons, all UI logic
├── background.js       # xAI API calls, prompts, message handlers
├── popup.html          # Settings page
├── popup.js            # Settings save/load
├── styles.css          # Sidebar and all UI styles
├── docs/               # Interface screenshots
└── icons/              # Extension icons

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Privacy & Security

• API key stored locally in Chrome's sync storage — never transmitted elsewhere
• All API calls go directly from your browser to xAI's API
• No data collection, no intermediary servers
• All code is local and auditable

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Tips

1. Fill in your voice profile first — it's what makes replies sound like you vs. generic AI
2. Use Question mode often — questions drive more replies and engagement than statements
3. Edit before posting — drafts are starting points, your edit makes them authentic
4. Thread context works on detail pages — click into a tweet first for context-aware replies on threads
5. Strategy tab is underrated — ask it to critique a draft or plan your week

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Screenshots

Settings

Engage

Sidebar

Reply & Post

Create

Strategy

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Made for professionals who want to build genuine authority on X, not just noise.