# Reap the processes your coding agents leave behind > Source: > Published: 2026-10-16 10:38:28+00:00 **Reap the processes your coding agents leave behind.** Reaper is a native macOS menu bar app that finds the dev servers, watchers and daemons started by coding agents and lets you kill them in one click. Agents spin up `npm run dev`, test servers and background daemons, then move on. Reaper shows every process an agent started: the command, the ports it holds and which agent started it. That includes **ghosts**, processes whose agent session has already ended. - Claude Code (CLI and desktop) - Cursor (editor and `cursor-agent` ) - Codex (CLI and desktop app) - OpenCode - T3 Code - **Grouped by agent:** each section shows the agent's own app icon. - **Ghosts first:** within each agent, ghosts (👻) come first, then the longest-running processes. - **Filters:** switch between*All* and*👻 Ghosts* , and optionally show only processes listening on a port. - **Ports:** click a port to open`http://localhost:` . A 🌐 marks ports open on all network interfaces, not just localhost. - **Kill:** × stops the whole process tree with SIGTERM, and offers*Force* (SIGKILL) if it survives. ⌥-click × to force-kill straight away. Expand a row to kill individual subprocesses. - **Context menu:** copy the command or PID, or reveal the working directory in Finder. - **Launch at login.** Reaper reads the process table with `libproc`, polls every 3 seconds, and doesn't shell out to `ps` or `lsof`. - **Ancestry:** a process belongs to an agent when one of its parent processes is that agent. - **Environment markers:** when the parent chain is broken because the process was reparented to`launchd` , Reaper falls back to markers that agents leave in the environment, such as`CLAUDECODE` ,`CODEX_SHELL` ,`CURSOR_AGENT` or the host app's bundle ID. Such a process is a ghost. - **Noise filtering:** the agents' own helper processes, editor extensions (language servers, test workers) and updaters are hidden. **Privacy:** Reaper only reads a fixed list of marker environment variables and never stores or shows any other environment values. It makes no network requests. Download the latest build from the [releases](https://github.com/AppulseSoftware/reaper/releases), unzip it and move `Reaper.app` to `/Applications`. Requires macOS 14 or later. Requires Xcode 16 or later (Swift 6). ``` ./bundle.sh # ad-hoc signed build at build/Reaper.app ./bundle.sh --install # build, copy to /Applications and launch ./bundle.sh --release # universal, Developer ID signed and zipped for distribution ``` `--release` signs with the first `Developer ID Application` identity in your keychain; set `SIGN_IDENTITY` to choose another. To notarize as well, store credentials once and pass the profile name: ``` xcrun notarytool store-credentials reaper-notary --apple-id --team-id NOTARY_PROFILE=reaper-notary ./bundle.sh --release ``` To see what Reaper detects without the UI: ``` build/Reaper.app/Contents/MacOS/Reaper --dump ``` Copyright 2026 Appulse Software B.V. Licensed under the [Apache License, Version 2.0](https://github.com/AppulseSoftware/reaper/blob/main/LICENSE). Made by [Appulse Software](https://appulse.software)