A guide for building command-line programs in Go with Cobra and Viper. Cobra handles command structure, while Viper manages configuration such as settings and environment variables.

Use it when designing or implementing a Go command-line application with Cobra commands, Viper configuration, and in-memory tests.

It provides a shared approach for organizing commands, loading configuration, and testing command-line behavior in memory.

cobra-viper — Plugin for Claude Code by PascaleBeier/hitkeep

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.

Clone the repo

git clone --depth 1 https://github.com/PascaleBeier/hitkeep

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/plugins/pascalebeier/hitkeep/cobra-viper/github.svg)](https://agentmods.dev/plugins/pascalebeier/hitkeep/cobra-viper)

Your own site

<a href="https://agentmods.dev/plugins/pascalebeier/hitkeep/cobra-viper"><img src="https://agentmods.dev/badge/plugins/pascalebeier/hitkeep/cobra-viper/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.

Your own site · 80×15

<a href="https://agentmods.dev/plugins/pascalebeier/hitkeep/cobra-viper"><img src="https://agentmods.dev/badge/plugins/pascalebeier/hitkeep/cobra-viper.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured The manifest loads nothing itself; its 1 skill cost 104 tokens a session between them.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin 100% copy Near-identical to another mod in the catalogue.

Security

Grade A, and why

cobra-viper 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 1mo 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.

Origin

This is a copy

100% identical to cobra-viper — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agents/skills/cobra-viper/.claude-plugin/plugin.json · 16 lines

What it actually says

{
  "$schema": "https://json.schemastore.org/claude-code-plugin-manifest.json",
  "name": "cobra-viper",
  "displayName": "CLI Architecture: Cobra & Viper",
  "description": "Definitive guide to building CLI applications with Cobra and Viper — command-first architecture, configuration management, environment variable binding, and in-memory CLI testing. Written by spf13, the original creator of both libraries.",
  "version": "1.0.0",
  "author": {
    "name": "Steve Francia",
    "email": "[email protected]"
  },
  "homepage": "https://github.com/spf13/go-skills",
  "repository": "https://github.com/spf13/go-skills",
  "license": "MIT",
  "keywords": ["go", "golang", "cli", "cobra", "viper", "configuration"]
}

Contents

What it installs

The manifest is a name and a version. 1 skill travel with it, and installing the plugin installs all of them — 104 tokens a session between them. Each is measured on its own page, and each can be installed alone.

Skill cobra-viper A 104 tokens

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.

1mo ago First seen · 16 lines scan A 456d219e95e3

Subscribe to this mod's changes

cobra-viper is a plugin published in the GitHub repository PascaleBeier/hitkeep (97 stars, last pushed today), 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. It is 100% identical to cobra-viper, differing in 0 lines, and is treated as a copy.

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cobra-viper