What is great-cto?
great-cto is a Claude Code mod by avelikiy that you already have the agent. This is everything around it. great_cto runs Claude Code as a pipeline of 72 specialist agents — an independent model checks each stage before the next builds. It is listed under Cost & usage and has 103 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | avelikiy |
| Repository | avelikiy/great_cto |
| Popularity | 103 GitHub stars |
| Category | Cost & usage |
| Security | Review before installing (72/100) |
| Rank | #113 of 5,272 Claude Code mods; #18 in Cost & usage |
| License | MIT |
| Last commit | 2026-10-17 |
| Hooks | 4 events |
| Sees | only the events it hooks |
| Draws on | Pane |
Is great-cto safe to install?
great-cto scores 72/100 on the MCPMods security check: Review before installing. Things to review: sends data over the network; reads environment variables. 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 |
|---|---|
| Sends data over the network | Review |
| Starts no processes | Pass |
| Writes no files or config | Pass |
| Reads environment variables | Review |
| Only sees the events it hooks | Pass |
| Doesn't drive Claude | Pass |
| Validator reported problems | Note |
| Has an open-source license | Pass |
API calls in its code
| Call | What it means |
|---|---|
$.clock.every | |
$.command.register | |
$.env.get | reads env vars |
$.http.fetch | network requests |
$.session.root | |
$.state.get | |
$.state.set | |
$.ui.open | draws interface |
$.ui.resolve | draws interface |
$.ui.status | draws interface |
$.ui.toast | draws interface |
How do I install great-cto?
- 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/avelikiy/great_cto claude plugin validate ./great_cto/.
- Install it. Run this in your terminal, then /reload-plugins in an open session.
claude plugin marketplace add avelikiy/great_cto && claude plugin install great-cto@great-cto
Or ask Claude to set it up
Paste this into Claude Code and it installs great-cto for you:
Install the "great-cto" Claude Code mod from https://github.com/avelikiy/great_cto. Run claude plugin validate on it first and show me what it can access before you enable it.