Borrowing it
Nothing to install: this file belongs to Ghosteken/agent-harness. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/Ghosteken/agent-harness/main/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/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.
<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="Reviewed on agentmods" width="80" 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 5.1 | $0.00985 | $0.00985 |
| Opus 5.5 | $0.00394 | $0.00394 |
| Sonnet 5.5 | $0.00197 | $0.00197 |
| Haiku 4.5 | $0.00098 | $0.00098 |
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 20d 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.
- 20d ago Changed · -2 tokens per session eb96221b8b41
- 27d ago Changed · +5 tokens per session 5df0a94ee953
- 1mo ago Changed · +4 tokens per session 9c43aaeb7caa
- 1mo ago Changed · +5 tokens per session 6e0b7d588fb3
- 1mo ago Changed · +4 tokens per session 117c12a38107
- 1mo ago Changed · +6 tokens per session 045c8eb03d33
- 1mo ago Changed · +10 tokens per session b20ad67199c8
- 1mo ago Changed · +4 tokens per session ba9297e82777
- 1mo 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 (4 stars, last pushed yesterday), licensed MIT. It adds 985 tokens to every session, about $0.0039 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.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
vscode model-prompts.instructions.md
Model-specific prompt authoring and registry guidelines.