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Lube Activity MonitorPrivate beta on macOS

See what your coding agents are up to.

Lube Activity Monitor shows which agent is busy in each project, the dev servers and ports it left behind, and what’s filling your disk. Plus every CPU core, GPU, memory and fans, from a window or the menu bar.

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The Developer workloads view in Lube Activity Monitor. A table lists projects with the coding agent working in each, such as Codex, the servers it started, and its CPU use, with filters for server, agent and runtime.
Developer workloads: each project and the agent working in it.

Three agents are running and the fans just took off.

See every project on your Mac, the coding agent working in it, the dev servers it started and how hard it’s working. Claude Code, Codex and Cursor are recognised by their real command path.

The Developer workloads view in Lube Activity Monitor. A table lists projects with the coding agent working in each, such as Codex, the servers it started, and its CPU use, with filters for server, agent and runtime.
Projects, the agent in each, and the servers it started.

Something is already using port 3000.

See which process holds every listening port and who can reach it, then stop the one in your way.

The Ports view in Lube Activity Monitor: listening ports 3000 to 3003 over TCP, reachable from this Mac only, each with the process that holds it, including Cursor.
Every listening port, and the process holding it.

Your disk is full and you don’t know why.

Scan your disk and see what’s taking the space, including what Finder doesn’t show: the worktrees Claude Code, Codex and Cursor leave behind, node_modules, Xcode data and Docker. Clean up from the list, or browse any folder by size.

The Developer section of a disk scan in Lube Activity Monitor, 151 GiB in total: Lube Code worktrees 35.9 GiB, simulators 25.6 GiB, node_modules folders 20.2 GiB, Xcode DerivedData 17 GiB, Codex worktrees 11.5 GiB, the pnpm store, iOS device support, Claude Code worktrees 7.6 GiB and package caches, several with a Clean up button.
Worktrees, node_modules, Xcode data and caches, with Clean up where it’s safe.
Browse folders in Lube Activity Monitor's disk space view: columns from the developer folder into Projects and then objects, each item with its size and a bar showing its share.
Browse folders by size, column by column.

Which cores are actually doing the work?

See the load on every performance and efficiency core, live, with your chip and whether it’s throttling.

The CPU view in Lube Activity Monitor on an Apple M2 Pro: 50.9% CPU, efficiency cores at 43% across 4 cores, performance cores at 54.8% across 8 cores, thermal state Normal, and a load bar for each performance and efficiency core above a chart of total CPU activity.
Every performance and efficiency core on an M2 Pro.

The fans are loud and you’d like a say.

Set your own fan speeds with RPM targets, curves across several sensors, and different profiles plugged in or on battery.

The Fans and temperatures view in Lube Activity Monitor: the left and right fans with live speed charts, a manual speed slider and RPM field, Set speed and Automatic buttons.
Fan speeds, live, with your own targets.

You just want to know what your Mac is doing.

Live CPU, GPU, memory, disks and network, from a window or the menu bar. Get an alert when CPU or memory stays high, even with the window closed.

Lube Activity Monitor's overview in light mode: CPU at 51.6% across 12 logical processors, 18.5 GiB of 32 GiB memory used, 35 processes and 3 volumes, with live charts for CPU, GPU, memory and disk.
Your Mac at a glance.

Everything else it keeps an eye on

  • Coding agents at workSee which agent is busy in each project, the dev servers it started, and what has already exited.
  • CPU and memoryLive CPU load on every core, GPU and memory, and which processes use the most memory.
  • Free up memoryGive apps their memory back without closing anything.
  • Fan controlTune your fans with RPM targets, multi-sensor curves and AC or battery profiles.
  • Ports and open filesSee what a process has open, and stop the one holding a port.
  • Disk spaceScan your disk to see what is using it, including the worktrees Claude Code, Codex and Cursor leave behind. Browse any folder and clean up.
  • Drives and networkThroughput, IOPS and service time for each drive, volumes grouped by device, and eject for external drives.
  • Alerts on sustained loadKnow when CPU or memory stays high, even with the window closed.

Coming to Windows and Linux

  • macOSPrivate beta
  • WindowsComing soon
  • LinuxComing soon

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