init_harness

init_harness is a skill for Claude Code from adrielp/ai-engineering-harness. It costs 23 tokens per session (579 once invoked), scanned A, original, Apache-2.0.

A repository setup command for the AI Engineering Harness, a project structure for keeping coding-agent instructions and working notes. It creates Claude Code's project memory file and a standard thoughts directory.

In plain words
What is it for?
Use it when starting the harness in a code repository, generating CLAUDE.md, creating thoughts/shared and thoughts/global folders, and adding a ticket template.
Why use it?
It gives a repository a consistent place for project guidance, tickets, plans, research, and shared notes. It also checks whether related instruction files already exist before changing the setup.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter. Also seen: mentions CLAUDE.md; mentions Claude Code; mentions AGENTS.md.

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 skills/adrielp/ai-engineering-harness/init_harness
Any agent
npx skills add adrielp/ai-engineering-harness --skill init_harness
Clone the repo
git clone --depth 1 https://github.com/adrielp/ai-engineering-harness

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.

agentmods badge for init_harness

README.md
[![agentmods](https://agentmods.dev/badge/skills/adrielp/ai-engineering-harness/init_harness.svg)](https://agentmods.dev/skills/adrielp/ai-engineering-harness/init_harness)
Your own site
<a href="https://agentmods.dev/skills/adrielp/ai-engineering-harness/init_harness"><img src="https://agentmods.dev/badge/skills/adrielp/ai-engineering-harness/init_harness.svg" alt="Measured on agentmods" height="20"></a>
Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 579 The whole file, excluding the scripts and references it only reads on demand.
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 5.1 $0.00023 $0.00579
Opus 5 $0.00012 $0.00290
Sonnet 5 $0.00005 $0.00116
Haiku 4.5 $0.00002 $0.00058

Measured 6d ago against content hash e759cf2c429e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

init_harness 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 6d 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/skills/init_harness/SKILL.md · 78 lines

How it starts

The opening of the file, as written. The whole thing — 78 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Initialize Harness

Initialize the AI Engineering Harness in this repository.

What This Command Does

  1. Runs the built-in /init command to generate CLAUDE.md
  2. Creates the thoughts/ directory structure for context engineering
  3. Adds a ticket template for consistent ticket creation
  4. Provides guidance on next steps

Instructions

Follow these steps to initialize the harness:

  1. Check the current state of the repository

    • Verify if CLAUDE.md already exists
    • Check if thoughts/ directory exists
    • Check if AGENTS.md already exists
  2. Run /init to generate CLAUDE.md (Claude Code's built-in command)

    • This analyzes the codebase and generates project memory
  3. Update CLAUDE.md with reference to AGENTS.md if AGENTS.md exists

    • This ensures Claudes default memory file includes reference to AGENTS.md if it exists.
  4. Create the thoughts/ directory structure:

    mkdir -p thoughts/shared/{tickets,plans,research}
    mkdir -p thoughts/global
    
  5. Add the ticket template to thoughts/global/ticket-template.md

  6. Optionally create a personal thoughts directory:

    • Check if personal directory exists
    • Check if all directories within personal exist (tickets, plans, research)
    mkdir -p thoughts/$(whoami)/{tickets,plans,research}
    
  7. Present next steps to the user

Important: The /init command is Claude Code's built-in command that analyzes the codebase and generates CLAUDE.md (Claude Code's project memory file). This /init_harness skill wraps that functionality and adds the context engineering setup.

Note: Claude Code uses CLAUDE.md for project memory.

Quick Reference

After running this command, the repository will have:

CLAUDE.md                           # Codebase context (from /init)
thoughts/
├── shared/
│   ├── tickets/                    # Feature requests, bugs, tasks
│   │   └── ticket-template.md      # Template for new tickets
│   ├── plans/                      # Implementation plans
│   └── research/                   # Research documents
└── global/                         # Cross-repository concerns

Read the full file on GitHub · 78 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. 6d ago First seen · 78 lines · 23 tokens per session scan A e759cf2c429e

Subscribe to this mod's changes

init_harness is a skill published in the GitHub repository adrielp/ai-engineering-harness (20 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 23 tokens to every session and 579 once invoked, about $0.0001 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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