experiments: Instructions file for Codex

AGENTS.md

experiments AGENTS.md is an instructions file for Codex, OpenCode from reliverse/experiments. It costs 1,384 tokens per session, scanned A, a copy of encephalon AGENTS.md, MIT.

Repository instructions for a TypeScript monorepo, a single repository containing multiple packages and apps. They explain its Bun workspace structure, dependency-update rules, and code-formatting checks.

In plain words
What is it for?
Use them when exploring the repository, updating dependencies, running tests or checks, and formatting TypeScript code.
Why use it?
They give a coding agent the project-specific rules it needs to work consistently across packages and apps.

Instructions file for CodexOpenCode

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

This is reliverse/experiments's own configuration. It tells Codex and OpenCode how to work on experiments 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 experiments configures →

Reuse

Borrowing it

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

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 experiments AGENTS.md

README.md
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Your own site
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agentmods 80×15 button for experiments AGENTS.md

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Per session 1,384 This file is loaded in full into every session.
When invoked 1,384 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 88% copy Near-identical to another mod 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 $0.01384 $0.01384
Opus 5.5 $0.00554 $0.00554
Sonnet 5.5 $0.00277 $0.00277
Haiku 4.5 $0.00138 $0.00138

Measured 1mo ago against content hash 637615315e6d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

experiments 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.

Origin

This is a copy

88% identical to encephalon AGENTS.md — 47 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

AGENTS.md · 155 lines

How it starts

The opening of the file, as written. The whole thing — 155 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Monorepo Project

This is an Bun monorepo with TypeScript. The project uses bun workspaces for package management. The project uses Turborepo for task local & remote caching. Every submodule of this monorepo, may include its own AGENTS.md file, which you must adhere to.

Project Structure

  • packages/ - Contains all workspace packages (relico, tsconfig, etc)
  • apps/ - Application definitions split by service (cli, scripts, etc)

Dler Rules

  • This project uses @reliverse/dler to manage bun monorepos easily
  • You can check dler's available commands with dler --help
  • Use only latest versions of dependencies
  • Use dler update to update all dependencies in monorepo

Where to find information

Read README.md to learn comprehensive information about the project.

Code Standards

This project uses Ultracite, a zero-config preset that enforces strict code quality standards through automated formatting and linting.

Quick Reference

  • Format code: bunx ultracite fix
  • Check for issues: bunx ultracite check
  • Diagnose setup: bunx ultracite doctor

Biome (the underlying engine) provides robust linting and formatting. Most issues are automatically fixable.


Core Principles

Write code that is accessible, performant, type-safe, and maintainable. Focus on clarity and explicit intent over brevity.

  • Use TypeScript with strict mode enabled
  • Import shared modules using workspace names, ie. @reliverse/relico
  • Be careful of circular dependencies, apps may rely on packages, not the other way around
  • Prefer single word variable/function names
  • Avoid try {} catch() {} where possible, prefer to let exceptions bubble up
  • Avoid else statements where possible
  • Do not make useless helper functions, inline functionality unless the function is reusable or composable
  • Prefer early returns over nested if statements

Type Safety & Explicitness

  • Use explicit types for function parameters and return values when they enhance clarity
  • Prefer unknown over any when the type is genuinely unknown
  • Use const assertions (as const) for immutable values and literal types
  • Leverage TypeScript's type narrowing instead of type assertions
  • Use meaningful variable names instead of magic numbers - extract constants with descriptive names

Read the full file on GitHub · 155 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.

  1. 1mo ago First seen · 155 lines · 1,384 tokens per session scan A 637615315e6d

Subscribe to this mod's changes

experiments AGENTS.md is an instructions file published in the GitHub repository reliverse/experiments (117 stars, last pushed 7mo ago), licensed MIT. It adds 1,384 tokens to every session, about $0.0055 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 88% identical to encephalon AGENTS.md, differing in 47 lines, and is treated as a copy.

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