What is agentctl?
agentctl is a Claude Code mod by sd0xdev that agent Control Plane for one Claude Code session: task scope, evidence, hand-over. A control and a display, not an isolation boundary. It is listed under Agents & automation and has 194 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | sd0xdev |
| Repository | sd0xdev/sd0x-harness |
| Popularity | 194 GitHub stars |
| Category | Agents & automation |
| Security | Review before installing (64/100) |
| Rank | #97 of 5,272 Claude Code mods; #16 in Agents & automation |
| License | MIT |
| Last commit | 2026-10-08 |
| Stars this week | +2 |
| Hooks | 14 events |
| Sees | Bash calls, GetTask calls, classic hooks, every prompt, every tool call |
| Draws on | AbovePrompt |
Is agentctl safe to install?
agentctl scores 64/100 on the MCPMods security check: Review before installing. Things to review: starts processes outside the sandbox; reads environment variables; watches every prompt or event. It passed 5 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 no files or config | Pass |
| Reads environment variables | Review |
| Watches every prompt or event | Review |
| 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.every | |
$.clock.now | |
$.command.register | |
$.env.get | reads env vars |
$.fs.exists | reads files |
$.fs.read | reads files |
$.process.run | runs processes |
$.prompt.fill | writes the prompt box |
$.prompt.read | |
$.prompt.suggest | writes the prompt box |
$.session.cwd | |
$.session.id | |
$.session.usage | |
$.store.delete | keeps its own state |
$.store.get | keeps its own state |
$.store.keys | keeps its own state |
$.store.set | keeps its own state |
$.turn.abort | drives Claude |
$.ui.invalidate | draws interface |
$.ui.log | draws interface |
$.ui.resolve | draws interface |
$.ui.toast | draws interface |
How do I install agentctl?
- 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/sd0xdev/sd0x-harness claude plugin validate ./sd0x-harness/mods/agentctl
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add sd0xdev/sd0x-harness && claude plugin install agentctl@sd0xdev-marketplace
Or ask Claude to set it up
Paste this into Claude Code and it installs agentctl for you:
Install the "agentctl" Claude Code mod from https://github.com/sd0xdev/sd0x-harness/tree/main/mods/agentctl. Run claude plugin validate on it first and show me what it can access before you enable it.