codex

Writing rules added to Codex’s instruction file to make its prose more direct and avoid set words, phrases, and sentence patterns. Codex is a command-line AI coding assistant.

In plain words
What is it for?
Editing AGENTS.md or another system-instruction file so Codex follows the no-slop prose rules when writing.
Why use it?
It reduces vague, inflated, or repetitive wording in documentation, emails, pull requests, and other written output.

Agent

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.

agentmods
npx agentmods add agents/byk3y/no-slop/codex
Clone the repo
git clone --depth 1 https://github.com/Byk3y/no-slop
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 411 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00000 $0.00411
Opus 5 $0.00000 $0.00205
Sonnet 5 $0.00000 $0.00082
Haiku 4.5 $0.00000 $0.00041

Measured 3d ago against content hash fb9bcd80871b, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

codex 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 3d 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/codex.md · 50 lines

What it actually says

Codex CLI

Install

Add the no-slop rules to your Codex system prompt. Create or edit your AGENTS.md or system instruction file:

Option 1: Clone and reference

git clone https://github.com/Byk3y/no-slop.git ~/.no-slop

Then add to your Codex instructions:

When writing prose, follow the rules in ~/.no-slop/SKILL.md

Option 2: Inline rules

Add the following to your Codex system prompt or instructions.md:

# no-slop rules for prose writing

When writing any prose (docs, emails, READMEs, PR descriptions):

1. BANNED WORDS: Never use: delve, tapestry, pivotal, vibrant, meticulous, landscape (metaphorical), testament, underscore, intricate, interplay, garner, bolster, foster, showcase, emphasize, crucial, enhance, leverage, utilize, facilitate, streamline, robust (in prose), seamless, holistic, synergy, paradigm, ecosystem (metaphorical), groundbreaking, renowned, profound, comprehensive.

2. COPULAS: Use "is/are/has." Not "serves as," "stands as," "boasts," "features."

3. NO STRUCTURAL FORMULAS: No rule-of-three. No "not only X but also Y." No "challenges and future prospects" endings.

4. NO PARTICIPLE CHAINS: Cut "-ing" filler words (highlighting, showcasing, emphasizing).

5. NO PROMOTIONAL TONE: State facts. No hype. No vague attributions.

6. NO COLLABORATIVE LANGUAGE: No "let's explore," "we will examine."

7. FORMATTING: Minimal bold. No emoji. Sentence-case headings.

8. WRITE LIKE A HUMAN: Vary sentence length. Use contractions. Be specific.

Update

cd ~/.no-slop && git pull
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. 3d ago First seen · 50 lines · 0 tokens per session scan A fb9bcd80871b

Subscribe to this mod's changes

codex is an agent published in the GitHub repository Byk3y/no-slop (10 stars, last pushed 4mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 411 tokens. 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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