Highlight Inbox Synthesizer

People sync hundreds of highlights from Readwise, Snipd, or Kindle into Obsidian and never open the folder again. Highlight Inbox Synthesizer reads the whole folder and writes one synthesis note: a summary, key claims, and topics per source, plus the themes that recur across sources. Runs on your own AI key. No server, no account, no subscription. Free tier included, one-time Pro license, no monthly fees.