securetools AGENTS.md

Contribution instructions for SecureTools, a collection of browser-based utilities built with plain HTML, CSS, and JavaScript. The tools run without a server, build process, tracking, or collection of user data.

In plain words
What is it for?
Use it when adding or changing a browser tool, checking its security and privacy constraints, or ensuring code follows the project’s file, script, and dependency rules.
Why use it?
It states strict project limits so new code does not introduce frameworks, backend processing, analytics, unsafe scripts, or unwanted data handling. Following these rules helps preserve the tools’ local-only design.

Instructions file for CodexOpenCode

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 instructions/midnightmarathon/securetools/agents-md
Clone the repo
git clone --depth 1 https://github.com/MidnightMarathon/securetools

Made for: Codex, OpenCode.

Per session 2,499 This file is loaded in full into every session.
When invoked 2,499 The same file — it is already loaded in full.
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 $0.02499 $0.02499
Opus 5 $0.01249 $0.01249
Sonnet 5 $0.00500 $0.00500
Haiku 4.5 $0.00250 $0.00250

Measured yesterday against content hash 82202df5d3e6, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

securetools 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 yesterday.

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 · 200 lines

How it starts

The opening of the file, as written. The whole thing — 200 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Instructions for SecureTools

This file is for AI coding agents (OpenClaw, Copilot, Codex, Devin, SWE-Agent, etc.). It describes the project rules, conventions, and workflows you must follow when contributing.


Project Summary

SecureTools is a collection of client-side browser tools at securegenerators.com. Every tool runs entirely in the browser with zero backend, zero tracking, and zero data collection. The codebase is vanilla HTML, CSS, and JavaScript — no frameworks, no build step, no node_modules.

Repository: MidnightMarathon/securetools


Hard Rules (will fail CI or be rejected if violated)

  1. No frameworks. No React, Vue, Svelte, Angular, jQuery, Tailwind, or any CSS/JS framework.
  2. No build step. No Webpack, Vite, Rollup, esbuild, or bundlers. No package.json in the repo.
  3. No server-side code. No backend, no API calls with user input, no form submissions to a server.
  4. No tracking. No analytics, no cookies, no fingerprinting, no telemetry of any kind.
  5. No inline JavaScript in HTML. All JS goes in a separate .js file loaded with defer. No onclick, oninput, or <script> blocks in HTML.
  6. CDN scripts require SRI. Every <script src="https://..."> must have integrity="sha384-..." and crossorigin="anonymous". Generate hashes at srihash.org.
  7. Shared CSS only. All tools link /assets/styles.css. Tool-specific overrides go in a small <style> block or a local .css file — never duplicate the shared styles.

File Structure

/
├── index.html              ← Home page (tool grid)
├── about.html              ← About page
├── assets/
│   └── styles.css          ← Shared stylesheet (all tools use this)
├── tool-template/          ← Starting point for new tools (copy this)
│   ├── index.html
│   ├── script.js
│   └── README.md
├── <tool-name>/            ← Each tool is a folder at the repo root
│   ├── index.html
│   ├── script.js
│   └── README.md           ← Optional but encouraged
├── .github/
│   ├── CODEOWNERS
│   ├── workflows/ci.yml    ← CI: HTML validation, SRI check, link check
│   ├── ISSUE_TEMPLATE/     ← Bug report and new tool proposal templates
│   └── PULL_REQUEST_TEMPLATE.md
├── CONTRIBUTING.md          ← Full contributor guide
├── AGENTS.md                ← This file
└── README.md

Read the full file on GitHub · 200 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. yesterday First seen · 200 lines · 2,499 tokens per session scan A 82202df5d3e6

Subscribe to this mod's changes

securetools AGENTS.md is an instructions file published in the GitHub repository MidnightMarathon/securetools (2 stars, last pushed 3mo ago), licensed MIT. It adds 2,499 tokens to every session, about $0.0125 per session on Opus 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.

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