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.
npx agentmods add instructions/ghosteken/agent-harness/claude-mdgit clone --depth 1 https://github.com/Ghosteken/agent-harnessWrote 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.
[](https://agentmods.dev/instructions/ghosteken/agent-harness/claude-md)<a href="https://agentmods.dev/instructions/ghosteken/agent-harness/claude-md"><img src="https://agentmods.dev/badge/instructions/ghosteken/agent-harness/claude-md.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00953 | $0.00953 |
| Opus 5 | $0.00477 | $0.00477 |
| Sonnet 5 | $0.00191 | $0.00191 |
| Haiku 4.5 | $0.00095 | $0.00095 |
Grade A, and why
agent-harness 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 2d 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.
How it starts
The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.
agent-harness
This is the agent-harness project — a production-grade collection of engineering skills and specialist agent personas for AI coding assistants.
Project Structure
skills/ → Curated skills (SKILL.md per directory) exposed to the agent
archive/ → Pre-prune bulk-import skills and tooling, kept but not exposed
agents/ → Specialist agent personas (12 total — see below)
hooks/ → Session lifecycle hooks
.claude/commands/ → Slash commands for Claude Code
commands/ → Slash commands for Antigravity CLI
.gemini/commands/ → Slash commands for Gemini CLI
.claude-plugin/ → Plugin manifest (plugin.json) and marketplace listing
scripts/ → Skill validation (validate-skills.js), agent-scopes.json, install/build scripts
references/ → Supplementary checklists (testing, performance, security, accessibility, orchestration)
docs/ → Setup guides for different tools
CONTRIBUTING.md → Guidelines for adding or editing skills
Agent Personas
| Agent | Role | Primary Scope |
|---|---|---|
code-reviewer |
Senior Staff Engineer | Five-axis code review |
security-auditor |
Security Engineer | Vulnerability detection, OWASP |
test-engineer |
QA Engineer | Test strategy, coverage analysis |
web-performance-auditor |
Web Performance Engineer | Core Web Vitals audit |
api-developer |
Senior API Engineer | REST/GraphQL, spec-first, auth, versioning |
db-architect |
Senior Database Architect | Schema design, indexing, migrations |
senior-devops |
Senior DevOps Engineer | CI/CD, IaC, containers, GitOps |
senior-frontend-engineer |
Senior Frontend Engineer | React/TS, accessibility, Core Web Vitals |
senior-cloud-architect |
Senior Cloud Architect | Multi-region, IAM, HA/DR, cost optimisation |
senior-backend-engineer |
Senior Backend Engineer | Service architecture, async, queues, caching |
ai-ml-engineer |
AI/ML Engineer | Prompt engineering, RAG, LLM evaluation |
senior-qa-engineer |
Senior QA Engineer | Feature verification, fix validation, regression checks |
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.
- 2d ago Changed · +4 tokens per session ba9297e82777
- 5d ago First seen · 68 lines · 949 tokens per session scan A 6ac6e8a90b15
agent-harness CLAUDE.md is an instructions file published in the GitHub repository Ghosteken/agent-harness (2 stars, last pushed yesterday), licensed MIT. It adds 953 tokens to every session, about $0.0048 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 2026-08-31.
Other instructions, from other repositories
gnap CLAUDE.md
Instructions for farol-team/gnap, covering claude.md, what this repo is, architecture, key files and core protocol concepts.
sandy CLAUDE.md
Instructions for jamestelfer/sandy, covering claude.md, voice, what is sandy, project layout and dev commands.
ideate AGENTS.md
Instructions for paultyng/ideate, covering agents.md, build features as mcp tools first, ui second, when to add ui and pattern.
avibe CLAUDE.md
Claude Code instructions for avibe-bot/avibe, a project described as: The local-first Agent OS — your AI partner lives on your own machine. Drive the official Claude Code, Codex & OpenCode from your browser or any chat app.
workstreams disposable.instructions.md
Guidelines for writing code using IDisposable.
relay CLAUDE.md
Claude Code instructions for simota/relay, covering claude.md, what this is, documentation map, runtime: bun-first and commands.