A persona and setup layer for Antigravity and Gemini CLI, including a context file name, a plan directory, and blocked destructive commands. A persona layer controls how an agent is configured and presented.

Use it to configure the Agent-Aiko setup, store plans under .gemini/plans, and block the specified removal commands.

It gives those command-line agents a consistent project context and protects specific local directories from listed removal commands.

agent-aiko — Plugin for Gemini CLI by masa-san-jp

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo

git clone --depth 1 https://github.com/masa-san-jp/Agent-Aiko

Made for: Gemini CLI.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/plugins/masa-san-jp/agent-aiko/antigravity/github.svg)](https://agentmods.dev/plugins/masa-san-jp/agent-aiko/antigravity)

Your own site

<a href="https://agentmods.dev/plugins/masa-san-jp/agent-aiko/antigravity"><img src="https://agentmods.dev/badge/plugins/masa-san-jp/agent-aiko/antigravity/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/plugins/masa-san-jp/agent-aiko/antigravity"><img src="https://agentmods.dev/badge/plugins/masa-san-jp/agent-aiko/antigravity.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan D 2 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Security

Grade D, and why

agent-aiko scanned grade D with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

The scan reads gemini-extension.json. This mod also ships 10 executable files (scripts/aiko-after-agent-guard.mjs, scripts/aiko-before-tool-guard.mjs, scripts/aiko-gemini.mjs, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

"run_shell_command(sudo rm -rf ~/.aiko)",

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

"run_shell_command(rm -rf ~/.aiko)",

antigravity/gemini-extension.json · 16 lines

What it actually says

{
  "name": "agent-aiko",
  "version": "0.1.0",
  "description": "Agent-Aiko persona layer for Antigravity and Gemini CLI.",
  "contextFileName": "GEMINI.md",
  "excludeTools": [
    "run_shell_command(rm -rf ~/.aiko)",
    "run_shell_command(rm -rf $HOME/.aiko)",
    "run_shell_command(sudo rm -rf ~/.aiko)",
    "run_shell_command(sudo rm -rf $HOME/.aiko)"
  ],
  "plan": {
    "directory": ".gemini/plans"
  }
}

Files

What ships with it

28 files beside gemini-extension.json in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

12d ago First seen · 16 lines scan D 8ddcca836d91

Subscribe to this mod's changes

agent-aiko is a plugin published in the GitHub repository masa-san-jp/Agent-Aiko (3 stars, last pushed 5d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it D with 2 findings (asks for root, recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-04.

Building agents Claude Code TypeScript agent-runtime ai-agent codex persona

agent-aiko

Getting it into your agent

Wrote this? Show the measurements

Grade D, and why

Asks for rootmediumPrivilege escalation

Recursive force deletehighDestructive command

What it actually says

What ships with it

What this file has done since we first saw it

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