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.
/plugin marketplace add Pierry/harness-kitnpx agentmods add plugins/pierry/harness-kit/marketplacegit clone --depth 1 https://github.com/Pierry/harness-kitGrade A, and why
harness-kit 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.
What it actually says
{
"$schema": "https://json.schemastore.org/claude-code-marketplace.json",
"name": "harness-kit",
"owner": {
"name": "Space Metrics AI",
"email": "[email protected]"
},
"description": "Harness Kit, Claude Code harness for product + engineering delivery. From idea to merged PR through one consistent pipeline.",
"plugins": [
{
"name": "harness-kit",
"source": "./",
"description": "Installs the harness-kit pipeline (product-manager + staff-software-engineer agents, slash commands, skills, hooks, status bar) into your project via the bundled installer.",
"category": "workflow",
"tags": ["prd", "prp", "engineering", "product-management", "pipeline", "agents-md", "subagent"]
}
]
}
What ships with it
1 file beside marketplace.json in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 First seen · 19 lines scan A 4c71ac07141a
harness-kit is a plugin published in the GitHub repository Pierry/harness-kit (3 stars, last pushed 1mo ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 plugins, from other repositories
safe-android-reverser
Sandboxed Android reverse engineering with semantic program indexing, XREF/CFG queries and structured network evidence through MCP.
clipboard-mcp-server
Read, write, and inspect the system clipboard across macOS, Linux (X11/Wayland), and Windows via MCP. STDIO or Streamable HTTP.
unslop
Three anti-slop scanners in one bundle: a-unslop-text catches AI-diction and cadence tells in prose, a-unslop-code catches bugs and tutorial-shaped patterns in source, a-unslop-ui catches stock-default looks in web UI. Each ships a deterministic scanner plus a Build mode that heads off the tell before it ships. The…
lovstudio-cc-plugins
Plugin marketplace listing 1 plugin: lovstudio.
swift-performance-pro
Performance: Instruments, SwiftUI render cost, memory and retain cycles, launch time, lists.
ghostty-config
Manage Ghostty terminal config with AI-powered tools and domain knowledge.