Annotate any doc, URL, or folder - send feedback to agents
You can now use Plannotator to annotate anything! Free, open source, and private (runs local). Use the skill `/plannotator-annotate` (or cli) - followed by a folder, URL, document, markdown, your book, a recipe, a plan, etc - to annotate anything and send feedback directly into your integrated agent. Use `/plannotator-last` to annotate the last message an agent sent you too. I like using it for my own version of Karpathy’s "LLM Wiki" in obsidian. https://github.com/backnotprop/plannotator
I wanted to be able to annotate anything and have feedback integrated directly into the agent loop. That's why I created this. It was also a constant desire to annotate the last agent message. Happy to introduce both capabilities in this new product launch.
Free, open source, your work runs locally and stays private.
“Annotate any doc, URL, or folder - send feedback to agents ”
Plannotator launched on Product Hunt on April 29th, 2026 and earned 93 upvotes and 4 comments, placing #15 on the daily leaderboard. You can now use Plannotator to annotate anything! Free, open source, and private (runs local). Use the skill `/plannotator-annotate` (or cli) - followed by a folder, URL, document, markdown, your book, a recipe, a plan, etc - to annotate anything and send feedback directly into your integrated agent. Use `/plannotator-last` to annotate the last message an agent sent you too. I like using it for my own version of Karpathy’s "LLM Wiki" in obsidian. https://github.com/backnotprop/plannotator
On the analytics side, Plannotator competes within Writing, Education, Artificial Intelligence and GitHub — topics that collectively have 646.6k followers on Product Hunt. The dashboard above tracks how Plannotator performed against the three products that launched closest to it on the same day.
Who hunted Plannotator?
Plannotator was hunted by Michael. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Plannotator including community comment highlights and product details, visit the product overview.
Michael
I wanted to be able to annotate anything and have feedback integrated directly into the agent loop. That's why I created this. It was also a constant desire to annotate the last agent message. Happy to introduce both capabilities in this new product launch.
Free, open source, your work runs locally and stays private.
https://github.com/backnotprop/plannotator
Try a demo of the annotation surface here: https://share.plannotator.ai