mcp-accessibility-scanner: Instructions file for Codex

AGENTS.md

mcp-accessibility-scanner AGENTS.md is an instructions file for Codex, OpenCode from JustasMonkev/mcp-accessibility-scanner. It costs 524 tokens per session, scanned A, original, MIT.

Project instructions for an MCP server, a program that lets an AI use tools, which scans webpages for accessibility problems and can automate browser actions. The project uses Node.js and TypeScript.

In plain words
What is it for?
It guides source edits, documentation updates, dependency installation, building, linting, testing, and work on the server, browser tools, and editor integrations.
Why use it?
It keeps changes consistent with the repository and helps prevent edits to generated files or accidental changes to published names and interfaces.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions Codex.

This is JustasMonkev/mcp-accessibility-scanner's own configuration. It tells Codex and OpenCode how to work on mcp-accessibility-scanner 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 mcp-accessibility-scanner configures →

Reuse

Borrowing it

Nothing to install: this file belongs to JustasMonkev/mcp-accessibility-scanner. 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/JustasMonkev/mcp-accessibility-scanner/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/JustasMonkev/mcp-accessibility-scanner

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.

agentmods badge for mcp-accessibility-scanner AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/justasmonkev/mcp-accessibility-scanner/agents-md.svg)](https://agentmods.dev/instructions/justasmonkev/mcp-accessibility-scanner/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/justasmonkev/mcp-accessibility-scanner/agents-md"><img src="https://agentmods.dev/badge/instructions/justasmonkev/mcp-accessibility-scanner/agents-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 524 This file is loaded in full into every session.
When invoked 524 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 $0.00524 $0.00524
Opus 5 $0.00262 $0.00262
Sonnet 5 $0.00105 $0.00105
Haiku 4.5 $0.00052 $0.00052

Measured today against content hash c55923c22f37, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

mcp-accessibility-scanner 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 today.

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 · 30 lines

What it actually says

  • This repository is a Node.js + TypeScript MCP server for automated accessibility scanning and browser automation.
  • Runtime entrypoints are cli.js for the published CLI and src/index.ts / src/program.ts for source-level behavior.
  • Built output lives in lib/ and should be treated as generated artifacts.
  • Keep changes focused and minimal; fix root causes instead of layering workarounds.
  • Match the existing TypeScript and ESM style already used in src/.
  • Do not rename the published package, binary name, or exported tool names unless explicitly requested.
  • Update README.md when user-facing behavior, commands, configuration, or tool surfaces change.
  • Prefer editing source files in src/; do not hand-edit generated files in lib/.
  • src/tools/: MCP tool implementations, including accessibility scans and browser actions.
  • src/mcp/: MCP transport/server helpers.
  • src/extension/ and src/vscode/: editor/extension integration code.
  • src/utils/: shared utilities.
  • Use nearby Vitest coverage when adding or changing behavior that is already tested.
  • Install dependencies: npm install
  • Build: npm run build
  • Lint: npm run lint
  • Test: npm test
  • Knip: npm run knip
  • Coverage: npm run test:coverage
  • Docker smoke test: npm run test:docker
  • Tool latency benchmark: npm run bench (see the Benchmarking section of README.md; build first, and compare revisions with npm run bench:compare)
  • TypeScript config is driven by tsconfig.json and tsconfig.all.json.
  • Accessibility behavior centers around Axe + Playwright integrations in src/tools/axe.ts, src/tools/auditSite.ts, src/tools/auditKeyboard.ts, and related helpers.
  • Keep output and report paths compatible with the current README and CLI expectations.
  • Reuse existing helpers before introducing new abstractions.
  • Prefer targeted validation first, then broader checks if needed.
  • When touching build, lint, or test behavior, run the relevant npm script before finalizing.
  • Before committing or pushing, self-review your diff against .codex/skills/pre-push-review/SKILL.md — a checklist of the recurring defect patterns automated PR review keeps finding in this repo.
  • Avoid introducing ignored or generated artifacts into version control; .gitignore already excludes lib/, coverage/, Playwright reports, and similar outputs.
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. today Changed c55923c22f37
  2. 7d ago First seen · 30 lines · 524 tokens per session scan A d573347c43ab

Subscribe to this mod's changes

mcp-accessibility-scanner AGENTS.md is an instructions file published in the GitHub repository JustasMonkev/mcp-accessibility-scanner (56 stars, last pushed yesterday), licensed MIT. It adds 524 tokens to every session, about $0.0026 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 2026-08-30.

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