gemini

gemini is an agent for coding agents from a5c-ai/babysitter. It costs 0 tokens per session (391 once invoked), scanned A, original, MIT.

An adapter for using Google's Gemini command-line tool from the adapters system, including setup, sign-in, prompts, models, sessions, extensions, and MCP servers.

In plain words
What is it for?
Use it to configure Gemini CLI, send prompts, choose a Gemini model, manage extensions or MCP servers, and locate saved sessions.
Why use it?
It gives one documented way to install and run Gemini CLI while recording the options and files it uses.

Agent

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.

agentmods
npx agentmods add agents/a5c-ai/babysitter/gemini
Clone the repo
git clone --depth 1 https://github.com/a5c-ai/babysitter

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.

agentmods badge for gemini

README.md
[![agentmods](https://agentmods.dev/badge/agents/a5c-ai/babysitter/gemini.svg)](https://agentmods.dev/agents/a5c-ai/babysitter/gemini)
Your own site
<a href="https://agentmods.dev/agents/a5c-ai/babysitter/gemini"><img src="https://agentmods.dev/badge/agents/a5c-ai/babysitter/gemini.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 391 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00391
Opus 5 $0.00000 $0.00196
Sonnet 5 $0.00000 $0.00078
Haiku 4.5 $0.00000 $0.00039

Measured 4d ago against content hash 17583c44e772, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

gemini scanned grade A with 0 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 4d ago.

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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

docs/adapters/reference/agents/gemini.md · 64 lines

What it actually says

Gemini CLI

Adapter for Google's Gemini CLI.

Install

adapters install gemini

Minimum CLI version: 1.0.0. Supported on macOS, Linux and Windows.

Auth

  • API key — set GOOGLE_API_KEY or GEMINI_API_KEY.
  • Browser login — sign in with a Google account.

Config file: ~/.config/gemini/settings.json.

Minimal run

adapters run gemini --prompt "Explain this diff"

Notable flags

  • --model <id> — default gemini-2.5-pro; also gemini-2.5-flash.
  • --prompt <text> — forwarded prompt.
  • --sandbox false — emitted when approvalMode: 'yolo' to disable the sandbox.

Session files

  • Location: ~/.gemini/sessions/*.jsonl
  • JSONL-formatted; standard adapters parser.

Extensions

Extension support: yes — Gemini CLI extension format for prompts, MCP servers, commands, themes, and hooks.

Extension Management

adapters plugin install gemini <extension>
adapters plugin list gemini

MCP Servers

adapters mcp install gemini <mcp-server>
adapters mcp list gemini

Registry: https://modelcontextprotocol.io for MCP servers.

Capabilities

1M-token context window, thinking (low/medium/high) with streaming, parallel tool calls, JSON mode, structured output, image input, file input.

Known limitations

  • No image output.
  • Project-level config is not supported (supportsProjectConfig: false).
  • --sandbox false should only be used in trusted environments — it disables the CLI's built-in safety sandbox.
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.

  1. 4d ago First seen · 64 lines · 0 tokens per session scan A 17583c44e772

Subscribe to this mod's changes

gemini is an agent published in the GitHub repository a5c-ai/babysitter (1,765 stars, last pushed today), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 391 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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