hanji: Instructions file for Codex

AGENTS.md

hanji AGENTS.md is an instructions file for Codex, OpenCode from kokodak/hanji. It costs 960 tokens per session, scanned A, original, MIT.

Repository-specific instructions for Hanji, a local-first Markdown editor written in Rust. They describe the product, documentation structure, and ownership of major parts such as text editing primitives.

In plain words
What is it for?
Use them when developing Hanji, especially its Rust editor core, documentation, architecture, design, or project website.
Why use it?
They help a coding agent understand Hanji's goals, file layout, and engineering conventions before making changes.

Instructions file for CodexOpenCode

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

This is kokodak/hanji's own configuration. It tells Codex and OpenCode how to work on hanji 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 hanji configures →

Reuse

Borrowing it

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

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 hanji AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/kokodak/hanji/agents-md/github.svg)](https://agentmods.dev/instructions/kokodak/hanji/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/kokodak/hanji/agents-md"><img src="https://agentmods.dev/badge/instructions/kokodak/hanji/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.

agentmods 80×15 button for hanji AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/kokodak/hanji/agents-md"><img src="https://agentmods.dev/badge/instructions/kokodak/hanji/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 960 This file is loaded in full into every session.
When invoked 960 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 $0.00960 $0.00960
Opus 5.5 $0.00384 $0.00384
Sonnet 5.5 $0.00192 $0.00192
Haiku 4.5 $0.00096 $0.00096

Measured 2mo ago against content hash f4550108fcc2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

hanji 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 · 72 lines

How it starts

The opening of the file, as written. The whole thing — 72 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Project Overview

Hanji is a lightweight, local-first Markdown editor built in Rust. It keeps local Markdown files as the source of truth and presents them through a focused visual editing surface.

The editor is designed for simple writing: open a Markdown file, edit it directly, and keep the saved document readable outside Hanji.

Product North Star

Hanji is a light, local-first Markdown editor. It should feel simple enough for notes, durable enough for plain text writing, and open enough for user plugins.

Project Structure

Engineering Guidelines

  • Prefer small, explicit modules over framework-heavy abstractions.
  • Keep the default app fast, offline-capable, and understandable.
  • Treat plugin APIs as public contracts. Document them before broadening them.
  • Avoid introducing persistent services, telemetry, or network behavior without a design document.
  • Keep UI copy calm, brief, and useful.

Read the full file on GitHub · 72 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 · 72 lines · 960 tokens per session scan A f4550108fcc2

Subscribe to this mod's changes

hanji AGENTS.md is an instructions file published in the GitHub repository kokodak/hanji (3 stars, last pushed 11d ago), licensed MIT. It adds 960 tokens to every session, about $0.0038 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.

Related

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hanji AGENTS.md next to 6 instructions from other repositories
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