muse: Instructions file for Codex

AGENTS.md

muse AGENTS.md is an instructions file for Codex, OpenCode from myths-labs/muse. It costs 270 tokens per session, scanned A, original, MIT.

Repository instructions for MUSE, an AI coding-governance system whose rules act as a project constitution. They require Chinese communication, skill checks, limited file reading, web research for unfamiliar patterns, and verification before completion.

In plain words
What is it for?
Following project-wide coding-agent rules, checking relevant skills, researching unfamiliar technical approaches, limiting large-file reads, and performing completion checks.
Why use it?
They set explicit rules for how an AI assistant should communicate, research, protect context, and verify its work.

Instructions file for CodexOpenCode

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

This is myths-labs/muse's own configuration. It tells Codex and OpenCode how to work on muse 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 muse configures →

Reuse

Borrowing it

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

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.

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README.md
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Your own site
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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 muse AGENTS.md

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Per session 270 This file is loaded in full into every session.
When invoked 270 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00270 $0.00270
Opus 5.5 $0.00108 $0.00108
Sonnet 5.5 $0.00054 $0.00054
Haiku 4.5 $0.00027 $0.00027

Measured 1mo ago against content hash 31f380b537de, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

muse 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 1mo 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 · 24 lines

What it actually says

MUSE repository instructions

Communicate in the user-selected language. Check relevant skills before changing code. Read files in bounded sections and verify actual behavior before claiming completion. Preserve user-owned changes and confidential material.

This repository distributes MUSE. Continuity source is skills/core/muse-commands/SKILL.md; installation is scripts/install.sh. Use docs/CONTINUITY.md or docs/CONTINUITY_CN.md for public usage. Project-specific roles, goals and authorization come from the user's actual configuration and request, not historical author role snapshots embedded in this file.

For MUSE runtime dependency checks, use muse-commands and its references/RUNTIME_DEPENDENCIES.md before diagnosing interpreter mismatches.

Preserve the selected role/Lane. Save meaningful deltas; at observed context 80%, save, compact if possible, verify and continue. Unknown occupancy stays unknown. Do not force Bye or a new conversation because of a percentage. Formal Bye is an explicit closeout with declared evidence. A CLOSED Lane retains its reopen rules.

The agent derives task goals, constraints and acceptance checks; do not make the user fill a recovery template. Keep working through authorized steps until done or genuinely blocked. Never confuse an installer/helper PASS with product QA.

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. 1mo ago Changed · +3 lines · +33 tokens per session 31f380b537de
  2. 2mo ago Changed · -2,192 lines · -29,239 tokens per session scan D → A 0afda4ff28ac
  3. 2mo ago First seen · 2,213 lines · 29,476 tokens per session scan D 4bda0e1a0085

Subscribe to this mod's changes

muse AGENTS.md is an instructions file published in the GitHub repository myths-labs/muse (38 stars, last pushed 6d ago), licensed MIT. It adds 270 tokens to every session, about $0.0011 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.

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