# Plannotator

19 Hacker News commenters recommended Plannotator and 0 criticized it, November 2025 to November 2026. It was recommended in 11 of 13 months. It meets the Hacker Approved badge rule.

**Verdict:** Free open-source tool for reviewing AI agent plans visually, annotating them and sending feedback to the agent. Critics say it feels like an add-on rather than integrated.

## Why people recommend it

- Visual annotation of plans (8 comments): "I needed a better way to actually review the plan, address certain parts, see plan diffs, etc all in a better visual way." ([source](https://news.ycombinator.com/item?id=47290366)) "If you've ever desired the ability for annotating the plan more visually, try fitting Plannotator in this workflow." ([source](https://news.ycombinator.com/item?id=47107151)) "Annotate and review coding agent plans visually, share with your team, send feedback to the agents with one click." ([source](https://news.ycombinator.com/item?id=46579261))
- Shared review with team (5 comments): "Annotate and review coding agent plans visually, share with your team, send feedback to the agents with one click." ([source](https://news.ycombinator.com/item?id=46579261)) "I have a handful of fairly vocal and supportive engineers I stay in contact with around plannotator.ai" ([source](https://news.ycombinator.com/item?id=48324101)) "I've built a self-hosted capability here with things like live collaboration for humans and agents." ([source](https://news.ycombinator.com/item?id=49762396))
- Sends feedback back to agent (3 comments): "Annotate and review coding agent plans visually, share with your team, send feedback to the agents with one click." ([source](https://news.ycombinator.com/item?id=46579261)) "I like how it let's me annotate the plan as I review and then send feedback or approve." ([source](https://news.ycombinator.com/item?id=47930983)) "annotate in a nice visual, and automatically send the feedback to the agent" ([source](https://news.ycombinator.com/item?id=47107593))
- Free, open source, runs locally (3 comments): "I just prefer a more lightweight setup and plannotator's UI which I can use to interactively review stuff." ([source](https://news.ycombinator.com/item?id=49852821)) "part of the free/open source capability at" ([source](https://news.ycombinator.com/item?id=50024248)) "open source runs locally, has code review" ([source](https://news.ycombinator.com/item?id=47808621))

## What people warn about

- Feels bolted on, not integrated (2 comments): "The only augment of Claude Code I have is a hook for plan mode review" ([source](https://news.ycombinator.com/item?id=47222472)) "Plannotator is very much an appendage rather than an integrated unit." ([source](https://news.ycombinator.com/item?id=50301342))

## Cite as

Hacker Approved, "Plannotator", https://hackerapproved.com/p/plannotator/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).