python-project-template: Instructions file for Codex

AGENTS.md

python-project-template AGENTS.md is an instructions file for Codex, OpenCode from mjun0812/python-project-template. It costs 495 tokens per session, scanned A, original, MIT.

Project instructions for a Python project template, covering development guidelines, code formatting, and linting. Linting checks source code for common mistakes and style problems.

In plain words
What is it for?
They are for adding or changing code in the template while following its development rules, formatting requirements, and lint checks.
Why use it?
They give the coding agent the project's expected way of developing and checking Python code.

Instructions file for CodexOpenCode

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

This is mjun0812/python-project-template's own configuration. It tells Codex and OpenCode how to work on python-project-template 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 python-project-template configures →

Reuse

Borrowing it

Nothing to install: this file belongs to mjun0812/python-project-template. 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/mjun0812/python-project-template/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/mjun0812/python-project-template

Made for: Codex, OpenCode.

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Per session 495 This file is loaded in full into every session.
When invoked 495 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 $0.00495 $0.00495
Opus 5.5 $0.00198 $0.00198
Sonnet 5.5 $0.00099 $0.00099
Haiku 4.5 $0.00049 $0.00049

Measured 1mo ago against content hash d50cb3677912, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

python-project-template 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 · 52 lines

What it actually says

Development Guidelines

This document contains critical information about working with this codebase. Follow these guidelines precisely.

Rules

  1. Package Management

    • ONLY use uv, NEVER pip
    • Installation: uv add package
    • Upgrading: uv add --dev package --upgrade-package package
    • FORBIDDEN: uv pip install, @latest syntax, editing uv.lock by hand
  2. Code Quality

    • Type hints required for all code
    • Imports used only in type annotations go under if TYPE_CHECKING: with from __future__ import annotations at the top of the module (Ruff TC rules)
    • Follow existing patterns exactly
    • Use Google style for docstring
  3. Testing Requirements

    • Framework: uv run --frozen pytest (runs in parallel; use -n 0 for --pdb)
    • Coverage: test edge cases and errors
    • Coverage report: uv run --frozen pytest --cov (CI fails below 80% branch coverage of src/)
    • New features require tests
    • Bug fixes require regression tests
  4. Git

    • Follow the Conventional Commits style on commit messages.
    • NEVER use git commit --no-verify; fix what the hooks report instead.
  5. Running

    • Application: uv run Python-Project-Template (or python -m my_package)

Code Formatting and Linting

  1. Ruff
    • Format: uv run --frozen ruff format .
    • Check: uv run --frozen ruff check .
    • Fix: uv run --frozen ruff check . --fix
  2. Type Check
    • Check: uv run --frozen ty check
  3. Git Hooks (prek)
    • Config: .pre-commit-config.yaml
    • Install: uv run prek install
    • Runs: on git commit
    • Tools: uv lock, Ruff, ty
  4. Agent Hooks
    • .agents/hooks/format-python.sh formats and lints every Python file right after Claude Code or Codex edits it (wired in .claude/settings.json and .codex/hooks.json). Do not re-run the formatter manually after edits.
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 · +14 lines · +235 tokens per session d50cb3677912
  2. 2mo ago First seen · 38 lines · 260 tokens per session scan A 281f13c192f8

Subscribe to this mod's changes

python-project-template AGENTS.md is an instructions file published in the GitHub repository mjun0812/python-project-template (33 stars, last pushed 3d ago), licensed MIT. It adds 495 tokens to every session, about $0.0020 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.

Related

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