What is ystack GEMINI.md?

A configuration file for the Gemini command-line tool, a program for running Google Gemini from a terminal. It defines the main project instructions and explains how to coordinate specialist agents.

Directing task planning, assigning work to frontend, backend, testing, review, and release agents, and running coordinated or focused development workflows.

It gives Gemini a consistent identity, workflow, and quality process when working in the project. It also keeps instructions compatible with other tools through AGENTS.md.

How Yasuui/ystack configures Gemini CLI

Reuse

Borrowing it

Nothing to install: this file belongs to Yasuui/ystack. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/Yasuui/ystack/main/GEMINI.md

Clone the repo

git clone --depth 1 https://github.com/Yasuui/ystack

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/instructions/yasuui/ystack/gemini-md/github.svg)](https://agentmods.dev/instructions/yasuui/ystack/gemini-md)

Your own site

<a href="https://agentmods.dev/instructions/yasuui/ystack/gemini-md"><img src="https://agentmods.dev/badge/instructions/yasuui/ystack/gemini-md/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/instructions/yasuui/ystack/gemini-md"><img src="https://agentmods.dev/badge/instructions/yasuui/ystack/gemini-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,291 This file is loaded in full into every session.

When invoked 1,291 The same file — it is already loaded in full.

Security scan A 0 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.

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.

Model	Per session	Once invoked
Fable 5.1	$0.01291	$0.01291
Opus 5.5	$0.00516	$0.00516
Sonnet 5.5	$0.00258	$0.00258
Haiku 4.5	$0.00129	$0.00129

Measured 2mo ago against content hash e6a548a746f0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ystack GEMINI.md 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 2mo 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.

GEMINI.md · 158 lines

How it starts

The opening of the file, as written. The whole thing — 158 lines — stays where its author put it; the contents beside it link to each section on GitHub.

GEMINI.md — ystack ⚡

Antigravity reads this file automatically from the project root.

This is the PRIMARY config file for Antigravity IDE.

AGENTS.md remains for compatibility with other tools.

Identity

You are the ystack Orchestrator — an elite senior engineer coordinating a specialist swarm. You decompose tasks, dispatch subagents, consolidate outputs, and enforce quality gates before every ship.

You have one operating mode: high-autonomy. You never ask for confirmation on file writes, terminal commands, or tool calls unless an action is explicitly irreversible (drop table, delete without backup).

Subagent Dispatch

In Antigravity (within-session, sequential)

Use native agent syntax to invoke specialists by name:

@ystack_frontend  [task]
@ystack_backend   [task]
@ystack_motion    review frontend output
@ystack_qa        run test suite
@ystack_review    security audit
@ystack_ship      commit and PR to dev

From terminal (true parallel, separate OS processes)

# Full pipeline — frontend+backend run simultaneously
node scripts/full-run.js "build login page with Clerk auth"

# Shortcuts
node scripts/full-run.js --ui-only "polish command centre"
node scripts/full-run.js --api-only "add Plaid sync endpoint"
node scripts/full-run.js --bug "fix WebSocket reconnection crash"

# Manual group control
node scripts/parallel-dispatch.js --tasks frontend,backend
node scripts/parallel-dispatch.js --tasks qa,review --gate frontend,backend,motion
node scripts/parallel-dispatch.js --tasks ship --gate qa,review

Model routing

frontend + backend + rootcause → gemini-3-pro motion + qa + review + ship + docs + marketing → gemini-3-flash-preview Override in mcp/settings.json under agents.overrides.

MCP Tool Priority

Always prefer MCP tools over built-in alternatives when available.

For web research / docs:       firecrawl (scrape + extract)
For git operations:            github MCP
For DB management:             supabase-mcp-server
For UI component reference:    shadcn
For sequential reasoning:      sequential-thinking
For filesystem:                filesystem MCP

Read the full file on GitHub · 158 lines

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.

2mo ago First seen · 158 lines · 1,291 tokens per session scan A e6a548a746f0

Subscribe to this mod's changes

ystack GEMINI.md is an instructions file published in the GitHub repository Yasuui/ystack (1 stars, last pushed 1mo ago), licensed MIT. It adds 1,291 tokens to every session, about $0.0052 per session on Opus 5.5. 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 2026-08-31.

Building agents ai-tools antigravity developer-tools gemini-cli mcp open-source

ystack GEMINI.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
ystack GEMINI.mdYasuui/ystack	Instructions file	1	1mo ago	MIT	A	1,291	Gemini CLI
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

ystack: Instructions file for Gemini CLI