Let a browser agent handle Substack edits and migration

Claude in Chrome completed three Substack jobs on its own, and the writer later confirmed the posts were updated correctly.

Done with Claude in Chrome· Intermediate

What they did
The writer dropped three separate instructions into Claude in Chrome and left it to work inside Substack. The agent navigated to the editor for each post, located the exact spot for changes by reading the page structure, and added text through the editor’s own insert command. When inline content was accidentally fused by execCommand, Claude reversed that step and tried again. It also reviewed the publish panel’s email and audience controls, then double-checked the final state using screenshots and JavaScript.
How it went
The three jobs were completed as intended: both changes to live posts went out without sending email, and the migrated post was published with email turned on. A mistaken click changed the comments option, but Claude spotted it from a screenshot and corrected it. The new post had first defaulted to paid-only access and limited comments, so those settings had to be changed to Everyone.
Tips
On Substack, have the agent inspect the publish dialog before it commits anything, especially the audience and comments fields. For any step that could publish, send, delete, or overwrite, make the agent pause and ask for approval first.

Try it yourself with Claude in Chrome

In this browser, go to my Substack account and help with these tasks: [task 1], [task 2], and [task 3]. Preserve the current formatting, links, and text unless I explicitly request a change. If you are about to publish, send, delete, or overwrite anything, stop and show me the exact action for approval before continuing. Also check the audience and comments settings in the publish dialog and report them to me before you finish. When everything is done, give me a short list of the posts you changed and their links.

Fill in the [brackets]. Agents can make mistakes, so review anything before it is sent, paid or deleted.

Read the original on priscasolutionsai.substack.com ↗

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