A quick and dirty bit of JS to run in the console to quickly unwatch repos in GitHub one page at a time

unwatch-github-repos.js

// WARNING: this script is very brittle and may not do what you intend.
//
//
// To run:
// 1. On github.com/watching, copy/paste the function into the console
// 2. Call the function, passing a function to filter repos to unwatch, e.g.,
//      unfollowMatches((repoName) => repoName.startsWith('rosston'))
// 3. Check the output of the function to make sure it looks right
// 4. Run the function again with `true` at the end to really for real make the changes, e.g.,
//      unfollowMatches((repoName) => repoName.startsWith('rosston'), true)

// Full version
function unfollowMatches(f, unfollow = false) {
	const matches = Array.from($$('.repo-list a')).filter((a) => f(a.textContent));

	if (!unfollow) {
		console.log("Matches that would be unfollowed are below. To actually unfollow them, pass `true` as the second argument to this function.");
		console.log(matches.map((a) => a.textContent));
		return;
	}

	matches.forEach((a) => a.parentElement.nextSibling.nextSibling.querySelectorAll('button')[1].click());
}