user script to copy link to the page as md

universal-link-copy.user.js

// ==UserScript==
// @name         Universal Link Copier (GitHub, Notion, and Others)
// @namespace    ViolentMonkey Scripts
// @version      1.3
// @description  Copy the link with relevant information from GitHub issues, pull requests, and other pages when nothing is selected and cmd+c is pressed.
// @author       You
// @match        *://github.com/*/*/*
// @match        *://notion.so/*
// @match        *://*/*
// @grant        none
// ==/UserScript==

(function() {
    // Function to copy the link based on the page content
    function copyLink() {
        const url = new URL(document.location);
        let link = "";

        // Emojis for GitHub issues and PRs
        const emoji = {
            issues: ":github-issue:",
            pull: ":pull-request:",
            draft: ":draft-pull-request:",
            merged: ":merged:",
        };

        // If the page is a GitHub issue or pull request
        if (url.host === "github.com" && /\/.*\/(issues|pull)\/(\d+)/.test(url.pathname)) {
            const m = url.pathname.match(/\/.*\/(issues|pull)\/(\d+)/);
            if (m) {
                let [_, type, id] = m;
                // Try to get the issue title from data-testid="issue-title" first
                const titleElement = document.querySelector('[data-testid="issue-title"]');
                const title = titleElement ? titleElement.textContent : (document.querySelector(".js-issue-title")?.textContent || "No Title");

                const isDraft = !!document.querySelector('.gh-header-meta [title="Status: Draft"]');
                const isMerged = !!document.querySelector('.gh-header-meta [title="Status: Merged"]');

                if (isDraft) type = "draft";
                if (isMerged) type = "merged";

                link = `${emoji[type] || emoji.pull} [${title.replaceAll("[", "【").replaceAll("]", "】")}](${url.href})`;
                console.log("GitHub link", link);
            }
        }
        // If the page is a Notion page
        else if (url.host.includes("notion.so")) {
            const title = document.querySelector("h1")?.innerText || "No Title";
            link = `[${title.replaceAll("[", "【").replaceAll("]", "】")}](${url.href})`;
            console.log("Notion link", link);
        }
        // Fallback for other pages (just title and URL)
        else {
            const title = document.title || "No Title";
            link = `[${title}](${url.href})`;
            console.log("Fallback link", link);
        }

        // Copy the link to the clipboard
        navigator.clipboard.writeText(link).then(() => {
            console.log("Link copied:", link);
        }).catch((err) => {
            console.error("Failed to copy text:", err);
        });
    }
    // Event listener for "cmd+c" when nothing is selected
    document.addEventListener('copy', function(e) {
        const selection = window.getSelection().toString();
        if (!selection) {  // Only trigger if no text is selected
              e.preventDefault();
              copyLink(); // Trigger the custom copy function
        }
    });
})();

Took ispiration from https://gist.github.com/iethree/9e39fd79e3d2e7f55aed39643066be59