Competitive programming sidekick

Spotter

It spots you.
It never lifts for you.

BUFF-JEPI, the Spotter robot, flexing
BUFF-JEPI / your spotter

What it does

A spotter, not a cheat sheet

  • Lives in Chrome's side panel

    Docked beside the problem, so you never switch tabs to ask for help.

  • One-click read

    On LeetCode and Codeforces, one click reads the problem straight off the page.

  • A 4-step hint ladder

    Observation, technique, approach, pseudocode. One step per press, and BUFF-JEPI counts your reps.

  • No free reps

    It never gives the solution. Beg for the answer and it says no.

  • Honest code checks

    Paste your attempt. It only calls a bug if it can show you a failing input.

  • Watch mode

    Wander off and you get side-eye, then anger, then it drags you back to the problem.

Chrome extension

Install in 1 minute

  1. Step 1: Unzip

    Unzip spotter-extension.zip into a folder you'll keep.

  2. Step 2: Developer mode

    Open this in a new tab, then turn on Developer mode (top right):

    chrome://extensions

    Websites can't link to chrome:// pages, so paste it in the address bar

  3. Step 3: Load unpacked

    Click Load unpacked and pick the unzipped folder (the one with manifest.json inside).

  4. Step 4: Pin and read

    Pin Spotter from the puzzle-piece menu, open a Codeforces or LeetCode problem and click the Spotter icon. Then hit Read this page.

No extension? No problem.

The website works on its own: open Spotter and paste a screenshot (Ctrl+V) or the problem text.