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.
npx agentmods add instructions/yasuui/ystack/gemini-mdgit clone --depth 1 https://github.com/Yasuui/ystackWhat 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 | $0.01291 | $0.01291 |
| Opus 5 | $0.00646 | $0.00646 |
| Sonnet 5 | $0.00258 | $0.00258 |
| Haiku 4.5 | $0.00129 | $0.00129 |
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 yesterday.
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.
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
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.
- yesterday First seen · 158 lines · 1,291 tokens per session scan A e6a548a746f0
ystack GEMINI.md is an instructions file published in the GitHub repository Yasuui/ystack (1 stars, last pushed 5mo ago), licensed MIT. It adds 1,291 tokens to every session, about $0.0065 per session on Opus 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.
Other instructions, from other repositories
gortex CLAUDE.md
Instructions for zzet/gortex, covering gortex, build & test, codebase overview, discovery (read once, then keep using) and llm provider (powers ask and searchsymbols assist: modes).
better-code-review-graph AGENTS.md
Instructions for n24q02m/better-code-review-graph, covering better-code-review-graph, cau truc, local-first boundary, lenh thuong dung and cau hinh quan trong.
aura copilot-instructions.md
Instructions for Naridon-Inc/aura, covering you must use aura. this is not optional, mandatory workflow, before writing code, while writing code and after completing work.
TokenPilot CLAUDE.md
Claude Code instructions for eowlsdh/TokenPilot, a project described as: Local-first macOS menu bar utility for AI coding-tool usage metadata.
chorus AGENTS.md
Instructions for valpere/chorus, covering chorus — agent context, what this project is, project structure, key files and agent registry (companion.mjs).
THEMIS AGENTS.md
Instructions for arsenelupin14/THEMIS, covering agents.md, product boundary, product boundary clarification, v0.2 research hardening rules and rules.