What is harness_engineering CLAUDE.md?

A set of instructions for Claude Code agents working in the harness_engineering repository. It defines the main rules, repository map, and workflow, including one branch per specification and a required writing review.

Guiding repository changes, specification work, branch use, and book-content reviews.

It gives agents a consistent way to work in that repository and records which process they must follow.

How GHDaru/harness_engineering configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to GHDaru/harness_engineering. 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/GHDaru/harness_engineering/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/GHDaru/harness_engineering

Made for: Claude Code.

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/ghdaru/harness_engineering/claude-md/github.svg)](https://agentmods.dev/instructions/ghdaru/harness_engineering/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/ghdaru/harness_engineering/claude-md"><img src="https://agentmods.dev/badge/instructions/ghdaru/harness_engineering/claude-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/ghdaru/harness_engineering/claude-md"><img src="https://agentmods.dev/badge/instructions/ghdaru/harness_engineering/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,983 This file is loaded in full into every session.

When invoked 1,983 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 unknown 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	$0.01983	$0.01983
Opus 5.5	$0.00793	$0.00793
Sonnet 5.5	$0.00397	$0.00397
Haiku 4.5	$0.00198	$0.00198

Measured 2mo ago against content hash 5c110394aef5, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

harness_engineering CLAUDE.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.

CLAUDE.md · 79 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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 · 79 lines · 1,983 tokens per session scan A 5c110394aef5

Subscribe to this mod's changes

harness_engineering CLAUDE.md is an instructions file published in the GitHub repository GHDaru/harness_engineering (6 stars, last pushed today), with no licence file. It adds 1,983 tokens to every session, about $0.0079 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

harness_engineering CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
harness_engineering CLAUDE.mdGHDaru/harness_engineering	Instructions file	6	today	none	A	1,983	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	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	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

harness_engineering: Instructions file for Claude Code