reactive-agents: Instructions file for Codex

AGENTS.md

reactive-agents AGENTS.md is an instructions file for Codex, OpenCode from tylerjrbuell/reactive-agents. It costs 6,277 tokens per session, scanned A, original, MIT.

Repository instructions for a Python project that uses Poetry to manage its environment and commands.

In plain words
What is it for?
Use them before running pytest or Python programs, setting up the virtual environment, or checking the project root.
Why use it?
They prevent dependency and import errors by requiring tests and scripts to run through Poetry instead of directly from the shell.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: reads .claude/ paths; mentions AGENTS.md.

This is tylerjrbuell/reactive-agents's own configuration. It tells Codex and OpenCode how to work on reactive-agents 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 reactive-agents configures →

Not installable: its command points at a path on the author’s own machine, so it runs nowhere else. The line is /home/tylerbuell/Documents/AIProjects/reactive-agents.

Reuse

Borrowing it

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

Made for: Codex, OpenCode.

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Per session 6,277 This file is loaded in full into every session.
When invoked 6,277 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 $0.06277 $0.06277
Opus 5.5 $0.02511 $0.02511
Sonnet 5.5 $0.01255 $0.01255
Haiku 4.5 $0.00628 $0.00628

Measured 2mo ago against content hash 03b96b9cde33, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

reactive-agents 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 · 789 lines

How it starts

The opening of the file, as written. The whole thing — 789 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

This file provides guidance to AI Agents when working with code in this repository.

Quick Start Checklist

Before running ANY command in this repository:

  • ✅ Use poetry run <command> OR enter poetry shell first
  • ❌ NEVER manually activate: source .venv/bin/activate
  • ❌ NEVER run Python/pytest directly without poetry run
  • ✅ Virtual environment is at .venv/ (managed by Poetry)
  • ✅ Check you're in project root: /home/tylerbuell/Documents/AIProjects/reactive-agents

Example correct commands:

poetry run pytest                           # ✅ Correct
poetry run python playground/runner.py      # ✅ Correct

poetry shell                                # ✅ Enters poetry environment
pytest                                      # ✅ Now correct (inside shell)
python playground/runner.py                 # ✅ Now correct (inside shell)

Example WRONG commands:

pytest                                      # ❌ Not in poetry environment
python playground/runner.py                 # ❌ Will fail with import errors
source .venv/bin/activate                   # ❌ Don't manually activate

Development Commands

Virtual Environment Setup

IMPORTANT: This project uses Poetry for dependency management.

The virtual environment is located at .venv/ in the project root.

# DO NOT manually activate the virtual environment
# Poetry handles this automatically with 'poetry run'

# WRONG - Don't do this:
source .venv/bin/activate
python script.py

# CORRECT - Use poetry run:
poetry run python script.py
poetry run pytest

# To run multiple commands in the poetry environment:
poetry shell  # Opens a new shell with venv activated
# Now you can run commands directly:
pytest
python playground/runner.py

Key Points:

  • Virtual environment: .venv/ (already created, don't recreate)
  • Python version: 3.10+ (check with poetry run python --version)
  • Always prefix commands with poetry run OR enter poetry shell first
  • If you see import errors, you're likely not in the poetry environment

Read the full file on GitHub · 789 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. 2mo ago First seen · 789 lines · 6,277 tokens per session scan A 03b96b9cde33

Subscribe to this mod's changes

reactive-agents AGENTS.md is an instructions file published in the GitHub repository tylerjrbuell/reactive-agents (6 stars, last pushed 9mo ago), licensed MIT. It adds 6,277 tokens to every session, about $0.0251 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 2026-08-31.

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