- Category
- Developer Tools
- Rank
- No. 2803Tools index
Previous survey · No. 2703 ·
- Pricing
- Open Source
- Type
- TOOL
- Use case
- Software Testing & Quality
- Latest release
- v2.8.0
- Date
About
r3 is a local tool for reviewing output from AI coding agents, including HTML pages, Markdown documents, and code diffs, without arguing back and forth in chat. Users can open an interactive artifact or diff, select an element or passage to leave direct comments, let the agent revise the work live, and track each issue through to resolution, functioning as a self-hosted alternative to Claude's Artifacts feature.
At a glance
r3 is a local review workspace for HTML, Markdown and code produced by an agent. It is worth trying if your feedback refers to a specific paragraph or area of a prototype and gets lost in chat.
Good fit
People reviewing a generated artifact and sending location-specific revisions back to the coding agent.
Consider something else when
Use a shared review system when reviewers need remote access or centrally managed permissions.
Start here
Publish a harmless draft into a scratch workspace, leave one anchored comment and verify that the agent receives the location and requested edit.
Cost and requirements
The project documents a publishing skill for a supported coding agent. The review interface runs locally.
Limits to know
Sending comments to an agent shares the feedback with that agent. Review the artifact and its surrounding context before asking the agent to act on it.
Sources checked 2026-11-05. Source-based assessment.
Why it made the leaderboard
Replaces back-and-forth chat review of agent-generated artifacts and diffs with inline commenting the agent can act on directly, tightening the review loop for any coding agent.
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Editorially curated, with community endorsements as a secondary signal. Corrections welcome.