Free to Use · Pro Available

Claude Hopper

Tools for the Rest of Us

Lightweight DevOps tools for Claude power users. Built by a solo developer who got tired of flying blind. Now you don't have to either.

Featured Tool

Session Monitor

A floating dashboard that tracks your Claude session in real time. Context usage, turn count, session duration, color-coded alert thresholds — everything you need to manage long conversations without surprises.

SESSION MONITOR
19%
14
Turns
19%
Ctx
82%
Cache
Modelopus-4-5
Context19% (38,400)
Session47m
Peak ctx22%
AlertNOMINAL
Health● LIVE

What it tracks

  • Context window usage (percentage of tokens consumed), read from Claude's own API responses — not estimated
  • Turn count and session duration
  • Real token counts per turn (input/output) and cache hit rate
  • Peak context high-water mark
  • Color-coded alert status at 30% / 55% / 75% thresholds
  • Browser notification if the monitor itself stops receiving data — you'll know if something's wrong, not just silence
Why These Tools Exist

Built from Necessity

When you're running multi-hour build sessions with Claude on a Chromebook, you learn fast what you need and what's missing.

📊
Context Awareness
Know exactly how much context window you've consumed before Claude starts forgetting your earlier instructions. No more surprise resets.
⚡
Zero Overhead
Lightweight Chrome extension. No server, no account, no API key. Install it, forget it's there until you need it.
🔔
Smart Alerts
The badge color escalates as your context fills up (green → gold → orange → red), so you see it coming. If the monitor itself ever stops getting real data, it tells you — no silent failures.
🛠️
Solo Dev Friendly
Built by one person on a Chromebook. Tested across marathon sessions. If it works for a 90-hour project sprint, it'll work for you.
Get Started

Installation

Up and running in 60 seconds. No build tools, no dependencies.

Chrome Extension Install

The Session Monitor runs as a lightweight Chrome extension with no external dependencies.

⬇ Download Extension v3.1.0 (zip)
1. Download the extension zip from this page
2. Unzip to a local folder
3. Go to chrome://extensions
4. Enable Developer Mode (toggle top right)
5. Click "Load unpacked" → select the folder
6. Navigate to claude.ai — the monitor appears automatically
Works on any Chromium-based browser. Tested on ChromeOS, Chrome, Edge, and Brave.