pyproject: Instructions file for Codex

AGENTS.md

pyproject AGENTS.md is an instructions file for Codex, OpenCode from draincoder/pyproject. It costs 369 tokens per session, scanned A, original, MIT.

Repository instructions for a Python project organized with Clean Architecture, where business logic is kept separate from user interfaces and external systems. They define the required tools, code structure, typing rules, and tests.

In plain words
What is it for?
Use them when adding Python code, deciding where modules belong, formatting or type-checking, and running lint, unit, integration, or end-to-end tests.
Why use it?
They make dependencies flow in the intended direction and provide mandatory commands and testing practices for consistent changes.

Instructions file for CodexOpenCode

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

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

Reuse

Borrowing it

Nothing to install: this file belongs to draincoder/pyproject. 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/draincoder/pyproject/master/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/draincoder/pyproject

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 pyproject AGENTS.md

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

Your own site · 80×15
<a href="https://agentmods.dev/instructions/draincoder/pyproject/agents-md"><img src="https://agentmods.dev/badge/instructions/draincoder/pyproject/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 369 This file is loaded in full into every session.
When invoked 369 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 $0.00369 $0.00369
Opus 5.5 $0.00148 $0.00148
Sonnet 5.5 $0.00074 $0.00074
Haiku 4.5 $0.00037 $0.00037

Measured 2mo ago against content hash 34dd2a0d2b44, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

pyproject 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 · 80 lines

What it actually says

Project Structure

config/
docker/
src/
  domain/
  application/
  infrastructure/
  presentation/
tests/
  unit/
  integration/
  e2e/

Rules:

  • Dependencies flow inward: presentation → application → domain
  • domain contains only business logic, no external dependencies
  • infrastructure implements interfaces defined in application

Architecture Principles (if applicable)

  • Follow Clean Architecture by default
  • Depend on abstractions, not concrete implementations
  • Extend behavior via composition, not modification
  • Keep modules small with a single responsibility

Tooling & Standards (Mandatory)

  • Python 3.14
  • Task runner: just
  • Formatting & linting: Ruff
  • Type checking: mypy
  • Testing: pytest with coverage
  • All code must be fully type annotated

Common commands:

just install
just lint
just test
just run
just up
just down

Testing Rules (Mandatory)

  • Tests mirror src/ structure
  • Use unit/, integration/, e2e/
  • Use Arrange / Act / Assert with explicit comments
  • Do not add comments in tests except parametrization case descriptions
  • Name tests by behavior and expected outcome
  • Prefer unit tests; add integration tests when behavior spans layers
  • Keep tests deterministic, fast, and isolated from network/IO

Commit & Pull Request Rules

  • Use Conventional Commits (e.g. feat: add auth middleware)
  • PRs must include a concise description and motivation

Local Configuration

Before running locally:

cp config/template.config.yaml config/config.yaml
cp config/template.env config/.env
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 · 80 lines · 369 tokens per session scan A 34dd2a0d2b44

Subscribe to this mod's changes

pyproject AGENTS.md is an instructions file published in the GitHub repository draincoder/pyproject (4 stars, last pushed 3mo ago), licensed MIT. It adds 369 tokens to every session, about $0.0015 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.

Related

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pyproject AGENTS.md next to 6 instructions from other repositories
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