Claude Code mod
gearbox
KOZMOS Gearbox: tool analytics for the session. Per tool its calls, errors and error rate, average, p95 and max duration and total time as a sorted bar chart, the five slowest calls, calls per minute, and the main loop against subagents. /gearbox toggles the sidebar.
Install
/plugin marketplace add ersinkoc/claude-mods
/plugin install gearbox@kozmosMods install like plugins. Run /reload-plugins or start a new session to load it.
What it can access
- Reach
- L1Reads: reads mod state, draws
- Sees
- subagent spawns, every tool call
- Draws in
Pane- Hooks
session.startcommand.runagent.spawntool.callui.render
From a static scan of the mod's code by awesome-claude-code-mods. It shows what the code asks for, not a security review.
How Claude Code mods work
- A mod is a plugin with a JavaScript or TypeScript module that runs inside Claude Code (version 2.1.287 or later). It can draw panes beside the transcript, a band above the prompt, buttons and toasts, restyle the spinner and tool rows, and watch or rewrite tool calls and prompts.
- It installs like any plugin: add its marketplace with /plugin marketplace add owner/repo, then /plugin install name@marketplace.
- Check what a mod can reach before installing: it runs with your permissions. Reach goes from drawing only, to reading files, to writing files or running processes, to the network. Run claude plugin validate on a clone to list its hooks and calls without running it.
- Turn one off from the Installed tab in /plugin, or start Claude Code with --safe-mode to skip every customization for a session.
Details
- Repository
- ersinkoc/claude-mods
- Folder
mods/gearbox- Marketplace
kozmos- Author
- KOZMOS
- License
- MIT
- Last updated
- 20 October 2026
- Listed in
- awesome-claude-code-mods
FAQ
What is gearbox?
KOZMOS Gearbox: tool analytics for the session. Per tool its calls, errors and error rate, average, p95 and max duration and total time as a sorted bar chart, the five slowest calls, calls per minute, and the main loop against subagents. /gearbox toggles the sidebar. It is a mod for Claude Code, from ersinkoc/claude-mods on GitHub.
What can the gearbox mod access?
Its widest reach is "reads" (reads mod state, draws). It sees subagent spawns, every tool call. It draws in Pane. Like any mod, it runs with your permissions.
How do I install gearbox?
Inside Claude Code (v2.1.287 or later), run /plugin marketplace add ersinkoc/claude-mods and then /plugin install gearbox@kozmos.
Is gearbox popular?
ersinkoc/claude-mods has 21 GitHub stars and 0 forks, and is included in 1 curated Claude Code list. It was last updated on 20 October 2026.
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