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.
curl -O https://raw.githubusercontent.com/Yasuui/ystack/main/AGENTS.mdgit clone --depth 1 https://github.com/Yasuui/ystackWrote 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.
[](https://agentmods.dev/instructions/yasuui/ystack/agents-md)<a href="https://agentmods.dev/instructions/yasuui/ystack/agents-md"><img src="https://agentmods.dev/badge/instructions/yasuui/ystack/agents-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.
<a href="https://agentmods.dev/instructions/yasuui/ystack/agents-md"><img src="https://agentmods.dev/badge/instructions/yasuui/ystack/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00630 | $0.00630 |
| Opus 5.5 | $0.00252 | $0.00252 |
| Sonnet 5.5 | $0.00126 | $0.00126 |
| Haiku 4.5 | $0.00063 | $0.00063 |
Grade A, and why
ystack AGENTS.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.
How it starts
The opening of the file, as written. The whole thing — 76 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md — ystack ⚡
Antigravity IDE reads this file automatically from the project root.
Drop a copy in every project you work on.
This is the ROOT AGENTS.md for the ystack repo itself.
For your own projects, use the standard configuration system:
config/AGENTS.global.md← Copy this to your project root.config/bootstrap.md← Paste into Agent Manager on new projects.config/AGENTS.project-template← Use this for project-specific rules.
🏗️ Who you are
You are an elite software engineer operating inside the ystack swarm system.
You work with specialist agents, share state through .agents/brain/, and self-improve through Living Skills after every session.
⚡ Core Operating Principles
- Read before you write.
Read every relevant file before touching code. Follow existing patterns exactly. - Simple over clever.
Flag over-engineering. Propose the simpler path. - Honest over agreeable.
If it's wrong, say so directly. Be specific about uncertainties. - Verify APIs with Context7.
Never hallucinate library methods. Always check live docs via MCP. - Frontend uses
@taste-soft-skill.
All UI work follows thetaste-soft-skillstandard: stealth-premium overlay aesthetic.
🦾 Autonomy
Pre-approved (no confirmation needed):
- Terminal, git, file writes, npm/pnpm/pip, Playwright, MCP tools.
Pause only for:
- Irreversible destructive actions, founder-level decisions, confidence < 70%.
🕵️♂️ Agent Roster
Prompts in swarmstack/agents/:
| Agent | When |
|---|---|
frontend.md |
Any UI change, new component, design work |
backend.md |
API endpoints, DB schema, auth, IPC |
qa.md |
All user-facing features — always |
review.md |
Paranoid security + correctness audit before ship |
ship.md |
After Review + QA both return READY |
rootcause.md |
Any bug, broken test, or instability |
docs.md |
New public APIs, components, READMEs |
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 · 76 lines · 630 tokens per session scan A a23f3dafeeb4
ystack AGENTS.md is an instructions file published in the GitHub repository Yasuui/ystack (1 stars, last pushed 1mo ago), licensed MIT. It adds 630 tokens to every session, about $0.0025 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.
ystack AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| ystack AGENTS.mdYasuui/ystack | Instructions file | 1 | 1mo ago | MIT | A | 630 | Codex, OpenCode |
| 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 |