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.
git clone --depth 1 https://github.com/Intense-Visions/harness-engineeringWrote 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/plugins/intense-visions/harness-engineering/gemini-extension)<a href="https://agentmods.dev/plugins/intense-visions/harness-engineering/gemini-extension"><img src="https://agentmods.dev/badge/plugins/intense-visions/harness-engineering/gemini-extension/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/plugins/intense-visions/harness-engineering/gemini-extension"><img src="https://agentmods.dev/badge/plugins/intense-visions/harness-engineering/gemini-extension.svg" alt="Reviewed on agentmods" width="80" height="20"></a>Grade A, and why
harness-gemini 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
{
"name": "harness-gemini",
"version": "0.1.0",
"description": "Harness for Gemini CLI — /harness:* slash commands and the harness MCP server, plus a GEMINI.md context document covering personas and skills. Sibling extensions exist for Claude Code, Cursor, and Codex.",
"contextFileName": "GEMINI.md",
"mcpServers": {
"harness": {
"command": "npx",
"args": ["-y", "-p", "@harness-engineering/[email protected]", "harness-mcp"]
}
}
}
What ships with it
60 files beside gemini-extension.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.
- commands/acceptance-eval.toml 16 KB
- commands/add-component.toml 11 KB
- commands/adr-fleet.toml 39 KB
- commands/architecture-advisor.toml 24 KB
- commands/audit-strength.toml 17 KB
- commands/audit.toml 24 KB
- commands/autopilot.toml 48 KB
- commands/brainstorming.toml 36 KB
- commands/bug-fleet.toml 51 KB
- commands/burn-hud.toml 27 KB
- commands/catalog-retrospective.toml 15 KB
- commands/cicd-fleet.toml 39 KB
- commands/cleanup-dead-code.toml 15 KB
- commands/cleanup-fleet.toml 36 KB
- commands/code-review.toml 47 KB
- commands/codebase-cleanup.toml 16 KB
- commands/compound.toml 17 KB
- commands/craft-fleet.toml 75 KB
- commands/debugging.toml 22 KB
- commands/dependency-health.toml 12 KB
- commands/deployment.toml 28 KB
- commands/detect-doc-drift.toml 11 KB
- commands/docs-fleet.toml 41 KB
- commands/docs-pipeline.toml 25 KB
- commands/enforce-architecture.toml 20 KB
- commands/execution.toml 35 KB
- commands/fleet-command.toml 116 KB
- commands/graph-integrity.toml 12 KB
- commands/hotspot-detector.toml 11 KB
- commands/ideate-fleet.toml 63 KB
- commands/ideate.toml 27 KB
- commands/impact-analysis.toml 12 KB
- commands/initialize-project.toml 48 KB
- commands/initialize-test-suite-project.toml 39 KB
- commands/integration.toml 32 KB
- commands/integrity.toml 12 KB
- commands/issue-fleet.toml 39 KB
- commands/knowledge-pipeline.toml 15 KB
- commands/maintenance-pipeline.toml 16 KB
- commands/offboarding.toml 18 KB
- commands/onboarding.toml 17 KB
- commands/perf-fleet.toml 49 KB
- commands/perf.toml 17 KB
- commands/planning.toml 48 KB
- commands/pr-fleet.toml 38 KB
- commands/pre-merge-brief.toml 15 KB
- commands/product-advisor.toml 23 KB
- commands/product-requirements.toml 19 KB
- commands/pulse.toml 18 KB
- commands/refactoring.toml 17 KB
- commands/rehearse.toml 16 KB
- commands/release-readiness.toml 37 KB
- commands/roadmap-fleet.toml 43 KB
- commands/roadmap-pilot.toml 21 KB
- commands/roadmap.toml 30 KB
- commands/rollback.toml 12 KB
- commands/security-fleet.toml 58 KB
- commands/security-scan.toml 9.1 KB
- commands/skill-authoring.toml 35 KB
- commands/soundness-review.toml 52 KB
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 8a1f1cba63d4
- 3d ago Changed 78e33674c6bf
- 6d ago First seen · 13 lines scan A 1a47f8c11da0
harness-gemini is a plugin published in the GitHub repository Intense-Visions/harness-engineering (20 stars, last pushed yesterday), 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 2026-09-06.
Other plugins, from other repositories
nextjs
Official Next.js skills: adopt and optimize Cache Components, adopt Partial Prefetching, and verify runtime behavior against a running dev server.
themes-example
themes-example. An open-source AI agent that brings the power of Gemini directly into your terminal.
claude-plugins-official marketplace
Directory of popular Claude Code extensions including development tools, productivity plugins, and MCP integrations.
humanizer
Rewrite AI-sounding text so it reads naturally without changing what it says.
knowledge-work-plugins marketplace
Plugin marketplace listing 104 plugins: noibu, productivity, enterprise-search, cowork-plugin-management, sales.
container
Teaches Claude container's command surface and how it maps to Docker, Lima, Colima, and Podman on macOS.