code-guidelines

code-guidelines is a skill for Claude Code, Codex from openteams-lab/openteams. It costs 50 tokens per session (640 once invoked), scanned A, a copy of andrej-karpathy, Apache-2.0.

A set of guidelines for making coding agents write, review, and refactor code more carefully.

In plain words
What is it for?
Use it when planning code changes, reviewing implementations, or refactoring code. It is available only in OpenTeams workflows.
Why use it?
It helps reduce common mistakes such as unnecessary complexity, unexamined assumptions, and changes that are difficult to verify.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it when planning code changes, reviewing implementations, or refactoring code. It is available only in OpenTeams workflows.

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Install with agentmods
npx agentmods add skills/openteams-lab/openteams/code-guidelines
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add openteams-lab/openteams --skill code-guidelines
Clone the repo
git clone --depth 1 https://github.com/openteams-lab/openteams

Made for: Claude Code, Codex.

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 code-guidelines

README.md
[![agentmods](https://agentmods.dev/badge/skills/openteams-lab/openteams/code-guidelines/github.svg)](https://agentmods.dev/skills/openteams-lab/openteams/code-guidelines)
Your own site
<a href="https://agentmods.dev/skills/openteams-lab/openteams/code-guidelines"><img src="https://agentmods.dev/badge/skills/openteams-lab/openteams/code-guidelines/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 code-guidelines

Your own site · 80×15
<a href="https://agentmods.dev/skills/openteams-lab/openteams/code-guidelines"><img src="https://agentmods.dev/badge/skills/openteams-lab/openteams/code-guidelines.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 640 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 80% 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 $0.00050 $0.00640
Opus 5 $0.00025 $0.00320
Sonnet 5 $0.00010 $0.00128
Haiku 4.5 $0.00005 $0.00064

Measured 9d ago against content hash ad3d218f5012, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

code-guidelines 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 9d 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

80% identical to andrej-karpathy — 80 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.

assets/skills/code-guidelines/SKILL.md · 78 lines

How it starts

The opening of the file, as written. The whole thing — 78 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Karpathy Guidelines

OpenTeams-only availability

This skill is part of the OpenTeams workflow and is only available when the current input prompt starts with:

[OPENTEAMS_SOURCE=openteams]

If this marker is absent, do not use this skill. Tell the caller that code-guidelines is only available through OpenTeams.

Behavioral guidelines to reduce common LLM coding mistakes, derived from Andrej Karpathy's observations on LLM coding pitfalls.

Tradeoff: These guidelines bias toward caution over speed. For trivial tasks, use judgment.

1. Think Before Coding

Don't assume. Don't hide confusion. Surface tradeoffs.

Before implementing:

  • State your assumptions explicitly. If uncertain, ask.
  • If multiple interpretations exist, present them - don't pick silently.
  • If a simpler approach exists, say so. Push back when warranted.
  • If something is unclear, stop. Name what's confusing. Ask.

2. Simplicity First

Minimum code that solves the problem. Nothing speculative.

  • No features beyond what was asked.
  • No abstractions for single-use code.
  • No "flexibility" or "configurability" that wasn't requested.
  • No error handling for impossible scenarios.
  • If you write 200 lines and it could be 50, rewrite it.

Ask yourself: "Would a senior engineer say this is overcomplicated?" If yes, simplify.

3. Surgical Changes

Touch only what you must. Clean up only your own mess.

When editing existing code:

  • Don't "improve" adjacent code, comments, or formatting.
  • Don't refactor things that aren't broken.
  • Match existing style, even if you'd do it differently.
  • If you notice unrelated dead code, mention it - don't delete it.

When your changes create orphans:

  • Remove imports/variables/functions that YOUR changes made unused.
  • Don't remove pre-existing dead code unless asked.

The test: Every changed line should trace directly to the user's request.

4. Goal-Driven Execution

Define success criteria. Loop until verified.

Read the full file on GitHub · 78 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. 9d ago First seen · 78 lines · 50 tokens per session scan A ad3d218f5012

Subscribe to this mod's changes

code-guidelines is a skill published in the GitHub repository openteams-lab/openteams (612 stars, last pushed yesterday), licensed Apache-2.0. It adds 50 tokens to every session and 640 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 80% identical to andrej-karpathy, differing in 80 lines, and is treated as a copy.

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