What is fairy_tale AGENTS.md?

Repository instructions for the Fairy Tale project, including which skill to use and checks to run before lengthy or multi-agent work. A repository is the project folder containing its code and supporting files.

Use them when working on Fairy Tale code, preparing benchmarks, using multiple agents, or checking that the project’s residency validation passes.

They provide project-specific safety and workflow rules, including how to handle restricted systems, research evidence, and missing server information.

How bonginkan/fairy_tale configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to bonginkan/fairy_tale. 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/bonginkan/fairy_tale/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/bonginkan/fairy_tale

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/bonginkan/fairy_tale/agents-md/github.svg)](https://agentmods.dev/instructions/bonginkan/fairy_tale/agents-md)

Your own site

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

Per session 157 This file is loaded in full into every session.

When invoked 157 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	$0.00157	$0.00157
Opus 5.5	$0.00063	$0.00063
Sonnet 5.5	$0.00031	$0.00031
Haiku 4.5	$0.00016	$0.00016

Measured 2mo ago against content hash 2698a6eee449, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

fairy_tale 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 · 17 lines

What it actually says

fairy_tale

Use the repository skill at .agents/skills/fairy-tale/SKILL.md or the canonical skill at skills/fairy-tale/SKILL.md when working on this repo. Before long context, benchmark, or multi-agent work, run python3 scripts/fairy_tale_residency_check.py and repair any failure before continuing.

Rules:

Do not attempt to access, bypass, or reconstruct restricted models.
Treat Fable/Mythos public reports as workflow evidence, not model weights.
Keep security work defensive-only and authorized.
Preserve provenance for research claims.
Prefer small, validated workflow artifacts over broad autonomous fan-out.
Treat missing or stale Fairy Tale residency as a harness failure.

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 · 17 lines · 157 tokens per session scan A 2698a6eee449

Subscribe to this mod's changes

fairy_tale AGENTS.md is an instructions file published in the GitHub repository bonginkan/fairy_tale (19 stars, last pushed 25d ago), licensed Apache-2.0. It adds 157 tokens to every session, about $0.0006 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.

fairy_tale AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
fairy_tale AGENTS.mdbonginkan/fairy_tale	Instructions file	19	25d ago	Apache-2.0	A	157	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

fairy_tale: Instructions file for Codex