What is anti-sycophant-ai-agent-skills AGENTS.md?

A collection of three skills that make AI assistants question untested product ideas instead of agreeing automatically. The skills are plain Markdown instructions that can work with several AI coding tools.

Use it to pressure-test an idea, distinguish a hobby project from a business, and seek evidence through one honest conversation with a person.

It helps prevent teams from building on assumptions or treating weak customer validation as proof.

How machinesoul11/anti-sycophant-ai-agent-skills configures Codex and

Reuse

Borrowing it

Nothing to install: this file belongs to machinesoul11/anti-sycophant-ai-agent-skills. 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/machinesoul11/anti-sycophant-ai-agent-skills/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/machinesoul11/anti-sycophant-ai-agent-skills

Made for: Codex, OpenCode.

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/machinesoul11/anti-sycophant-ai-agent-skills/agents-md/github.svg)](https://agentmods.dev/instructions/machinesoul11/anti-sycophant-ai-agent-skills/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/machinesoul11/anti-sycophant-ai-agent-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/machinesoul11/anti-sycophant-ai-agent-skills/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/machinesoul11/anti-sycophant-ai-agent-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/machinesoul11/anti-sycophant-ai-agent-skills/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 655 This file is loaded in full into every session.

When invoked 655 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	$0.00655	$0.00655
Opus 5.5	$0.00262	$0.00262
Sonnet 5.5	$0.00131	$0.00131
Haiku 4.5	$0.00065	$0.00065

Measured 2mo ago against content hash f43b2fac397d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

anti-sycophant-ai-agent-skills 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.

AGENTS.md · 41 lines

How it starts

The opening of the file, as written. The whole thing — 41 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

This file is for AI coding agents (Claude Code, Cursor, Copilot, Gemini, OpenCode, Codex, Aider, Cline, anything else) working inside this repository. For end-user installation of these skills in your own projects, see docs/getting-started.md.

What this repo is

A pack of three skills that get AI assistants to push back on unvalidated product ideas instead of agreeing by default. The skills are plain Markdown with YAML frontmatter — portable across any LLM that accepts a system prompt.

Repo layout

skills/                     One directory per skill, each containing SKILL.md.
  prove-the-premise/        Pressure-test idea premise before building.
  hobby-or-business/        Separate project enthusiasm from business reality.
  one-real-conversation/    Reject validation theater; demand one honest human conversation.

.claude/commands/           Claude Code slash commands.
.gemini/commands/           Gemini CLI slash commands.
.claude-plugin/             Claude Code plugin manifests.
docs/                       Per-tool setup guides.

Rules for agents editing this repo

Skills live at skills/<name>/SKILL.md. Kebab-case directory name. The directory name must match the name: field in the frontmatter exactly.
Frontmatter is non-negotiable. Every skill needs name and description. The description must include both Use when triggers and a Do NOT use when off-switch. Skills without an off-switch are bugs.
One file per skill: SKILL.md, and nothing else inside the directory. No scripts/, no supporting .md files, no references. If a skill outgrows ~500 lines, that's a sign the skill is trying to do too much — split it into two skills with distinct triggers, don't add scratch files. Long shared reference material across multiple skills would go in a top-level references/ directory; so far nothing has needed one.
Don't add tooling without being asked — no test runners, validation scripts, CI configs, or hooks. The repo is intentionally minimal.
Preserve tone. The skills are blunt on purpose. Don't soften them. But also don't sharpen them into cruelty — that's a tone regression.
Cross-reference rather than duplicate. If one skill needs guidance from another, link to it by name.

Read the full file on GitHub · 41 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 · 41 lines · 655 tokens per session scan A f43b2fac397d

Subscribe to this mod's changes

anti-sycophant-ai-agent-skills AGENTS.md is an instructions file published in the GitHub repository machinesoul11/anti-sycophant-ai-agent-skills (34 stars, last pushed 3mo ago), licensed MIT. It adds 655 tokens to every session, about $0.0026 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 2026-08-30.

Building agents ai ai-agents claude codex gemini skills

anti-sycophant-ai-agent-skills AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
anti-sycophant-ai-agent-skills AGENTS.mdmachinesoul11/anti-sycophant-ai-agent-skills	Instructions file	34	3mo ago	MIT	A	655	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	yesterday	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

anti-sycophant-ai-agent-skills: Instructions file for Codex