create-great-harness

create-great-harness is a skill for Claude Code from wayne930242/straw-boss. It costs 57 tokens per session (2,155 once invoked), scanned B, original, MIT.

A skill for bootstrapping a minimal agent setup in an application that has no CLAUDE.md instructions or .claude configuration. It creates the project guidance file and adds other pieces only when the scope calls for them.

In plain words
What is it for?
It is for creating a starter CLAUDE.md and, when explicitly justified, a small supporting hook or rule for an app's agent setup.
Why use it?
It gives an otherwise unconfigured application basic instructions for coding-agent work. It also requires the intended scope to be confirmed before writing into the application.

Skill for Claude Code

Written for Claude Code: PreToolUse hook event. Also seen: reads .claude/ paths; mentions CLAUDE.md.

Part of the straw-boss plugin — 17 skills, 2 hooks shipped together

Good fit It is for creating a starter CLAUDE.md and, when explicitly justified, a small supporting hook or rule for an app's agent setup.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/wayne930242/straw-boss/create-great-harness
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.

Any agent
npx skills add wayne930242/straw-boss --skill create-great-harness
Clone the repo
git clone --depth 1 https://github.com/wayne930242/straw-boss

Made for: Claude Code.

Or install straw-boss, the plugin that ships this one along with the rest of its 17 skills, 2 hooks.

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 create-great-harness

README.md
[![agentmods](https://agentmods.dev/badge/skills/wayne930242/straw-boss/create-great-harness/github.svg)](https://agentmods.dev/skills/wayne930242/straw-boss/create-great-harness)
Your own site
<a href="https://agentmods.dev/skills/wayne930242/straw-boss/create-great-harness"><img src="https://agentmods.dev/badge/skills/wayne930242/straw-boss/create-great-harness/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 create-great-harness

Your own site · 80×15
<a href="https://agentmods.dev/skills/wayne930242/straw-boss/create-great-harness"><img src="https://agentmods.dev/badge/skills/wayne930242/straw-boss/create-great-harness.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 57 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,155 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. 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 $0.00057 $0.02155
Opus 5 $0.00028 $0.01077
Sonnet 5 $0.00011 $0.00431
Haiku 4.5 $0.00006 $0.00215

Measured 9d ago against content hash a7fdec983dba, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade B, and why

create-great-harness scanned grade B with 1 finding 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 9d 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

1. **Dedup check.** Read `<app-dir>/.claude/settings.json` if it exists. If a hook already covers the same event+matcher:
skills/create-great-harness/SKILL.md · 88 lines

How it starts

The opening of the file, as written. The whole thing — 88 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Overview

A lightweight agent-system bootstrap for an app that has none. CLAUDE.md is the only unconditional artifact. A guard hook or skill-authoring rule is included only when concrete project evidence or explicit confirmed scope calls for it.

Runs either inline (a user asked for this directly) or as a dispatched agent rooted in <app-dir> (init's own bootstrap step dispatches it via dispatching-work). The dispatch instruction, when present, states that scope was already confirmed and how to report completion — Task 1 and Task 6 both branch on whether that's the case.

Task 1: Confirm scope before writing anything

State the confirmed scope before writing: <app-dir>/CLAUDE.md, plus any optional hook or rule the user or dispatch instruction explicitly requested. The survey may support a recommendation for another artifact, but extending the confirmed scope remains a user-owned decision.

  • Invoked directly by a user in this session: get explicit confirmation before proceeding — this writes into the app's own checkout, not just plugin state.
  • Invoked as a dispatched agent: the dispatch instruction already states the scope was confirmed — that confirmation is init's own per-app yes/skip ask. Don't ask again; there's no user in this session to answer, and re-asking just stalls a claude -p dispatch. State the scope for the record and proceed straight to Task 2.

Verification: either the user confirmed in this session or the dispatch instruction carried the confirmed scope before any file was written.

Task 2: Survey the app for non-obvious content

Read what's actually there: package.json/pyproject.toml/Cargo.toml/go.mod/equivalent manifest, lockfile (which package manager — bun.lock vs package-lock.json vs pnpm-lock.yaml matters), top-level directory listing, existing README if short. Filter everything through one question: can a fresh Claude session derive this from reading the code, the manifest, or running ls? If yes, it doesn't belong in CLAUDE.md.

Read the full file on GitHub · 88 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. 9d ago First seen · 88 lines · 57 tokens per session scan B a7fdec983dba

Subscribe to this mod's changes

create-great-harness is a skill published in the GitHub repository wayne930242/straw-boss (3 stars, last pushed yesterday), licensed MIT. It adds 57 tokens to every session and 2,155 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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