Ryokan: Instructions file for Codex

AGENTS.md

Ryokan AGENTS.md is an instructions file for Codex, OpenCode from johnthreekay/Ryokan. It costs 34,143 tokens per session, scanned B, original, GPL-3.0.

Project instructions for the Ryokan repository, covering how coding agents should understand, build, run, lint, format, and measure the project.

In plain words
What is it for?
Use it when working on Ryokan to find its project overview, development commands, environment variables, and coverage guidance.
Why use it?
It gives an agent the repository-specific rules and commands it needs before changing code.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md.

This is johnthreekay/Ryokan's own configuration. It tells Codex and OpenCode how to work on Ryokan itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything Ryokan configures →

Reuse

Borrowing it

Nothing to install: this file belongs to johnthreekay/Ryokan. 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/johnthreekay/Ryokan/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/johnthreekay/Ryokan

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.

agentmods badge for Ryokan AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/johnthreekay/ryokan/agents-md/github.svg)](https://agentmods.dev/instructions/johnthreekay/ryokan/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/johnthreekay/ryokan/agents-md"><img src="https://agentmods.dev/badge/instructions/johnthreekay/ryokan/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.

agentmods 80×15 button for Ryokan AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/johnthreekay/ryokan/agents-md"><img src="https://agentmods.dev/badge/instructions/johnthreekay/ryokan/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 34,143 This file is loaded in full into every session.
When invoked 34,143 The same file — it is already loaded in full.
Security scan B 2 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.34143 $0.34143
Opus 5.5 $0.13657 $0.13657
Sonnet 5.5 $0.06829 $0.06829
Haiku 4.5 $0.03414 $0.03414

Measured 3d ago against content hash 4c5761626550, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

Ryokan AGENTS.md scanned grade B with 2 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 3d 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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

- **`mold` + `clang`** — `.cargo/config.toml` pins `linker = "clang"` with `-fuse-ld=mold` for x86_64 + aarch64 Linux. Links faster than the default rust-lld; without them a build fails with `"linker 'clang' not found"`

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- **Streaming bodies must survive a poll after the end.** The compression layer polls a response body once more after it returns `None` while it finishes its encoder; `futures::stream::unfold` panics on that, and the pan
AGENTS.md · 293 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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.

  1. 3d ago Changed · +1 lines · +1,085 tokens per session 4c5761626550
  2. 16d ago Changed · +126 tokens per session 9952bd06c9cd
  3. 25d ago Changed · +14 lines · +4,659 tokens per session ba36d5c25a84
  4. 26d ago Changed · +2 lines · +445 tokens per session f6c19f071d9c
  5. 1mo ago Changed · +7 lines · +4,640 tokens per session 06419cdc82c1
  6. 1mo ago Changed · +1 lines · +1,200 tokens per session f50059a5af62
  7. 1mo ago Changed · +142 tokens per session b80a1485d778
  8. 1mo ago Changed · +16 lines · +5,580 tokens per session 27a46d65a4b9
  9. 1mo ago Changed · +3 lines · +678 tokens per session 91dfecbfe245
  10. 1mo ago First seen · 249 lines · 15,588 tokens per session scan B 0eda24305952

Subscribe to this mod's changes

Ryokan AGENTS.md is an instructions file published in the GitHub repository johnthreekay/Ryokan (6 stars, last pushed yesterday), licensed GPL-3.0. It adds 34,143 tokens to every session, about $0.1366 per session on Opus 5.5. A static security scan graded it B with 2 findings (asks for root, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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