For updating all current Substack posts in your inbox to "Archived" - copy and paste this into the console on your browser:

let isArchiving = false;
let lastProcessedPost = null;

function archiveVisiblePosts() {
    if (isArchiving) return;
    isArchiving = true;

    const posts = document.querySelectorAll('._linkRow_1qqfh_28.reader2-post-container');
    let delay = 0;
    const delayIncrement = 300;