Plannotator Inbox is a local, email-style workspace for supervising coding agents that run for long periods or work in parallel. Instead of relying on each agent’s chat window and scrollback, agents send questions, blockers, plans, prototypes, and code reviews to a shared inbox as separate threads with relevant context. People can respond when ready; their answer is delivered back to the agent, which can then continue its work. The central idea is to make human review asynchronous without interrupting the agent’s run or requiring someone to watch its session.
The review tools support more than text replies: users can choose among options, annotate documents and prototypes, comment on code diffs, and mark up images. A guided code review organizes changes into sections, each with a summary and corresponding diff, while documents and prototypes can be opened alongside their thread or full-screen. The inbox connects directly with Claude Code, Pi, and OpenCode, and can work with other MCP-compatible agents, including Codex and Cursor, subject to setup and version requirements. It runs on the user’s machine, listens locally, and stores threads and answers under the user’s Plannotator directory; it can also be accessed from a phone through Tailscale. The software is open source under MIT or Apache 2.0 licenses.
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