Display Repo Size for GitHub (OpenScript Userscript)

A lightweight OpenScript userscript that displays the total repository size directly in the About section on GitHub repository pages (for both public and private repositories).

Features

• Integrated in About Section: Injects cleanly under repository details in the right sidebar (e.g. 📦 673.9 KB repo size).
• Accurate Size Detection: Automatically detects when GitHub's API returns 0 KB on newly created repositories and falls back to calculating the total content size via the Git Trees API.
• Private & Public Repositories: Works on public repositories out-of-the-box and uses GH_PAT from OpenScript secrets for private repositories.
• Turbo / SPA Compatible: Seamlessly persists across GitHub's Turbo and client-side page transitions.

Installation in OpenScript

1. Open the OpenScript extension popup.
2. Click + New in the header.
3. Paste the contents of DisplayRepoSizeGitHub.user.js.
4. Click save script.

GitHub PAT Configuration (for Private Repos)

1. Generate a GitHub Personal Access Token (repo scope for private repos) at github.com/settings/tokens.
2. Open OpenScript and switch to the Secrets tab.
3. Add a secret:
   • Key: GH_PAT
   • Value: <your_token>
4. Click + Add. OpenScript synchronizes the secret via chrome.storage.sync and securely provides it to your script as OpenScript.env.GH_PAT.