ocr-arena: Instructions file for Codex

AGENTS.md

ocr-arena AGENTS.md is an instructions file for Codex, OpenCode from abdshomad/ocr-arena. It costs 786 tokens per session, scanned A, original, MIT.

A set of instructions for coding agents working on OCR Arena, a web application for testing and comparing optical character recognition systems. It describes the app’s web stack, service paths, testing rules, and file-path conventions.

In plain words
What is it for?
Use it when modifying OCR Arena, checking its Next.js frontend and PostgreSQL-backed services, working with its OCR and language-model servers, or following its testing and screenshot procedures.
Why use it?
It gives agents repository-specific rules before they change code, helping them avoid incorrect assumptions, unnecessary edits, and invalid absolute paths.

Instructions file for CodexOpenCode

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

This is abdshomad/ocr-arena's own configuration. It tells Codex and OpenCode how to work on ocr-arena 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 ocr-arena configures →

Not installable: its command points at a path on the author’s own machine, so it runs nowhere else. The line is /home/user/path.

Reuse

Borrowing it

Nothing to install: this file belongs to abdshomad/ocr-arena. 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/abdshomad/ocr-arena/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/abdshomad/ocr-arena

Made for: Codex, OpenCode.

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Per session 786 This file is loaded in full into every session.
When invoked 786 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 $0.00786 $0.00786
Opus 5.5 $0.00314 $0.00314
Sonnet 5.5 $0.00157 $0.00157
Haiku 4.5 $0.00079 $0.00079

Measured 2mo ago against content hash 5fa41ae23b8f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ocr-arena 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 · 71 lines

How it starts

The opening of the file, as written. The whole thing — 71 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Guidelines: OCR Arena

This repository implements the OCR Arena web application. AI agents working in this repository must adopt and follow the guidelines defined in the andrej-karpathy-skills submodule.


1. Core Behavioral Guidelines

Adhere strictly to CLAUDE.md:

  • Think Before Coding: Avoid assumptions. Ask the user if there's any ambiguity.
  • Simplicity First: Implement only requested features without speculative abstractions.
  • Surgical Changes: Touch only what is required. Match the existing codebase style.
  • Goal-Driven: Define success criteria first and systematically verify changes.

2. Web Stack & Paths

  • Frontend: Next.js (App Router, Tailwind CSS, TypeScript).
  • Database: PostgreSQL (initialized automatically on demand).
  • Backend APIs: Served via Docker under ocr-engines configuration.
    • Layout parsing APIs on ports 8090-8093.
    • vLLM servers on ports 8118-8121.
  • Relative Paths Only: Never use absolute paths containing username (e.g. /home/user/path). Use relative paths (e.g., . or ./path).

3. App Testing & Screenshots

  • E2E tests are run only when explicitly requested (using "test" or "t").
  • Execute tests via:
    uv venv && source .venv/bin/activate && uv sync && uv run playwright install
    uv run python3 -m tests.run_all
    
  • Save step-by-step screenshots to /screenshots/ using the format: {NN}-{step}-{variant_if_any}-{slug}.jpg (e.g., 01-step1-default-upload.jpg).

4. Issue Recording

Record any installation, server, debugging, or client integration issue in issues/ immediately as issues/{NN}-{slug}.md using the following format:

# Issue {NN}: {Short title}
## Problem
What failed, with exact error or symptom.
## Context
Environment, command run, and relevant config.
## Solution
What fixed it or current status/workaround.

5. Autonomous Enhancements Plan

When requested, manage enhancements in plan/next-enhancements.md:

  • "enhance" / "e": Plan at least 3 pending enhancements ([TODO]) for each section (Compare Workspace, Scan History, Telemetry & Analytics). Report the plan to the user.
  • "next" / "n": Locate the active task list, execute the next pending task, update its status to [DONE] in both AGENTS.md and the plan, and stop.

Read the full file on GitHub · 71 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. 2mo ago First seen · 71 lines · 786 tokens per session scan A 5fa41ae23b8f

Subscribe to this mod's changes

ocr-arena AGENTS.md is an instructions file published in the GitHub repository abdshomad/ocr-arena (2 stars, last pushed 5mo ago), licensed MIT. It adds 786 tokens to every session, about $0.0031 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.

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ocr-arena AGENTS.mdabdshomad/ocr-arenaInstructions file25mo agoMITA786Codex, OpenCode
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