What is subagent-tuner?
subagent-tuner is a Claude Code mod by Kruhlikau that picks the model and reasoning effort of every subagent: a recommendation by task kind, a band above the prompt, and a saved default that wins. Needs Claude Code 2.1.295 or later. It is listed under Agents & automation and has 2 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | Kruhlikau |
| Repository | Kruhlikau/subagent-tuner |
| Popularity | 2 GitHub stars |
| Category | Agents & automation |
| Security | Review before installing (76/100) |
| Rank | #1,204 of 5,272 Claude Code mods; #111 in Agents & automation |
| License | MIT |
| Last commit | 2026-10-15 |
| Hooks | 6 events |
| Sees | Agent calls, subagent spawns |
| Draws on | Pane, AbovePrompt |
Is subagent-tuner safe to install?
subagent-tuner scores 76/100 on the MCPMods security check: Review before installing. Things to review: starts processes outside the sandbox; writes files or config. It passed 6 of 8 checks.
Mod footprints come from claude plugin validate, which lists every event a mod hooks and every API call it makes without running it.
| Check | Result |
|---|---|
| No network access | Pass |
| Starts processes outside the sandbox | Review |
| Writes files or config | Review |
| Doesn't read environment variables | Pass |
| Only sees the events it hooks | Pass |
| Doesn't drive Claude | Pass |
| Passes claude plugin validate | Pass |
| Has an open-source license | Pass |
API calls in its code
| Call | What it means |
|---|---|
$.clock.now | |
$.clock.sleep | |
$.fs.write | writes files |
$.process.run | runs processes |
$.session.surfaces | |
$.state.get | |
$.state.set | |
$.store.get | keeps its own state |
$.store.set | keeps its own state |
$.ui.ask | draws interface |
$.ui.close | draws interface |
$.ui.open | draws interface |
$.ui.panes | draws interface |
$.ui.resolve | draws interface |
$.ui.toast | draws interface |
How do I install subagent-tuner?
- Check your Claude Code version. Mods need Claude Code 2.1.287 or later and are on by default.
claude --version
- Read its footprint. This lists every event it hooks and every API call it makes, without running it.
git clone https://github.com/Kruhlikau/subagent-tuner claude plugin validate ./subagent-tuner/.
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add Kruhlikau/subagent-tuner && claude plugin install subagent-tuner@subagent-tuner
Or ask Claude to set it up
Paste this into Claude Code and it installs subagent-tuner for you:
Install the "subagent-tuner" Claude Code mod from https://github.com/Kruhlikau/subagent-tuner. Run claude plugin validate on it first and show me what it can access before you enable it.