What is prompt-improver AGENTS.md?

Contributor guidance for a repository that packages prompt-improver as an Agent Skill. It identifies the canonical skill directory and the files used for marketplace packaging and offline checks.

Use it when changing the prompt-improver skill, its references, repository links, marketplace metadata, or contribution checks.

It prevents contributors from placing installable content in the wrong location or editing generated links incorrectly. It also gives the repository’s local smoke-test command.

How owenob1/prompt-improver configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to owenob1/prompt-improver. 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/owenob1/prompt-improver/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/owenob1/prompt-improver

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/owenob1/prompt-improver/agents-md/github.svg)](https://agentmods.dev/instructions/owenob1/prompt-improver/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/owenob1/prompt-improver/agents-md"><img src="https://agentmods.dev/badge/instructions/owenob1/prompt-improver/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/owenob1/prompt-improver/agents-md"><img src="https://agentmods.dev/badge/instructions/owenob1/prompt-improver/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 132 This file is loaded in full into every session.

When invoked 132 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.

Model	Per session	Once invoked
Fable 5.1	$0.00132	$0.00132
Opus 5.5	$0.00053	$0.00053
Sonnet 5.5	$0.00026	$0.00026
Haiku 4.5	$0.00013	$0.00013

Measured 2mo ago against content hash d1ff7d76c1bb, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

prompt-improver 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 · 11 lines

What it actually says

Contributor notes (not a skill)

This repository packages prompt-improver as an Agent Skill.

Canonical skill lives in skills/prompt-improver/.
Do not put installable skill content at the repo root.
Claude marketplace entry: .claude-plugin/marketplace.json → plugins/prompt-improver/.
The plugin skill path is a symlink to the canonical skill folder.
Offline checks: bash tests/smoke-test.sh.
Prefer short root README; deep prompting material stays in skills/prompt-improver/references/.

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.

2mo ago First seen · 11 lines · 132 tokens per session scan A d1ff7d76c1bb

Subscribe to this mod's changes

prompt-improver AGENTS.md is an instructions file published in the GitHub repository owenob1/prompt-improver (6 stars, last pushed 1mo ago), licensed MIT. It adds 132 tokens to every session, about $0.0005 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.

Building agents LLM agent-skills ai-agents bash cli prompt-engineering

prompt-improver AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
prompt-improver AGENTS.mdowenob1/prompt-improver	Instructions file	6	1mo ago	MIT	A	132	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	275k	2d ago	MIT	A	4,313	Codex, OpenCode

prompt-improver: Instructions file for Codex