ELIG turns a PR or branch diff into an interactive, plain-English lesson inside VS Code. Step through your changes one concept at a time, with the relevant code highlighted in the editor as you go. Ask follow-up questions, request simpler explanations, or rephrase on demand.
Built for developers who want to actually understand a diff — not just skim it.
How it works
Open a repo in VS Code
Click the ELIG icon in the activity bar (the caveman)
Hit Grug this Branch or Grug a PR
ELIG analyzes the diff using whatever AI you have installed (GitHub Copilot, Claude, etc.) and generates a step-by-step lesson
Walk through each step — the relevant file opens and the changed lines are highlighted automatically
Features
Branch diff: analyzes everything between your current branch and the base branch
PR diff: paste a GitHub PR URL or number to review any PR
Step-by-step lessons: changes grouped into logical concepts, ordered from foundational to dependent
File highlights: relevant lines highlighted in amber as you read each step
Color-coded sections: each file section in a step gets a neon color; explanation paragraphs have matching colored borders so you always know which text maps to which file
Hover to highlight: hover over any explanation paragraph to pop the matching file sections — unrelated sections dim, referenced ones light up and slide forward
Click to lock: click a paragraph to keep its sections highlighted while you read; click again to release
Files changed panel: resizable panel showing every changed file with progress status (explained, current, upcoming)
Ask Grug: type any question about the current step and get a plain-English answer
Explain dumber: one click to get a simpler explanation
Rephrase: get a completely different take on the same concept
Jump to any step: dropdown nav or click directly from the summary screen
Session resume: close VS Code and reopen — ELIG remembers your last session and drops you back where you left off
Works with any AI: uses the VS Code Language Model API — no separate API key needed
Requirements
You need at least one language model installed in VS Code. Either of these works:
