What is promethos AGENTS.md?

Repository guidelines for PromethOS, a collection of reusable instruction files that help coding agents perform specific tasks. It explains how skills are organized and how contributors should validate them.

Use it when adding or changing skills, repository documentation, installation files, or automation, then run the provided validation scripts before submitting changes.

Without shared rules, skill files and documentation can become inconsistent or incomplete. These checks catch structural problems, missing requirements, duplicate names, and broken links.

How bikeread/promethos configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to bikeread/promethos. 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/bikeread/promethos/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/bikeread/promethos

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/bikeread/promethos/agents-md/github.svg)](https://agentmods.dev/instructions/bikeread/promethos/agents-md)

Your own site

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

Per session 697 This file is loaded in full into every session.

When invoked 697 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	$0.00697	$0.00697
Opus 5.5	$0.00279	$0.00279
Sonnet 5.5	$0.00139	$0.00139
Haiku 4.5	$0.00070	$0.00070

Measured 2mo ago against content hash 5bd9c05f4f61, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

promethos 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 · 61 lines

How it starts

The opening of the file, as written. The whole thing — 61 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Repository Guidelines

Project Structure & Module Organization

skills/ is the canonical library. Each skill lives in skills/<skill-name>/SKILL.md; supporting files should stay beside it, typically in references/. Name skills with short, task-first, verb-led ids using lowercase letters, digits, and hyphens only. Keep bootstrap and harness-mapping material under the routing/bootstrap skill directory rather than scattering it across the library. Contributor and platform docs live in docs/, CONTRIBUTING.md, .codex/INSTALL.md, GEMINI.md, and gemini-extension.json. Automation lives in scripts/ and .github/workflows/.

Build, Test, and Development Commands

There is no compiled build or local server in this repository. The required validation commands are:

./scripts/validate-skills.sh
python3 ./scripts/check-repo-docs.py

This checks for exactly one SKILL.md per top-level skill directory, required frontmatter, required headings, duplicate skill names, and bootstrap reference files, plus required public-facing docs and local Markdown links. If you change install or platform docs, also run a harness-specific smoke check, for example ls -la ~/.agents/skills/promethos for Codex.

Coding Style & Naming Conventions

Keep content portable across harnesses. Do not fork the same skill body per provider; put tool-mapping notes in the routing/bootstrap skill's references/ directory. Every SKILL.md must define name and description. Keep name + description at 250 characters or less, and put trigger language in description instead of a separate when_to_use field. Then include the exact headings enforced by the validator: # Goal, ## Inputs, ## Non-Goals, ## Workflow, ## Output Contract, ## Escalation, and ## Common Failure Modes. Keep SKILL.md concise and move long examples or variant-specific detail into references/. Follow the existing Markdown style: short paragraphs, direct bullets, and wrapped lines. Shell scripts should remain Bash with set -euo pipefail.

Read the full file on GitHub · 61 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 · 61 lines · 697 tokens per session scan A 5bd9c05f4f61

Subscribe to this mod's changes

promethos AGENTS.md is an instructions file published in the GitHub repository bikeread/promethos (33 stars, last pushed 7mo ago), licensed MIT. It adds 697 tokens to every session, about $0.0028 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.

promethos AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
promethos AGENTS.mdbikeread/promethos	Instructions file	33	7mo ago	MIT	A	697	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

promethos: Instructions file for Codex