What is signalk-container-helper?

A helper library for building SignalK server plugins that run Docker or Podman containers through the signalk-container manager. SignalK is a marine-data standard and server for sharing boat and instrument data.

Use it when creating a SignalK plugin whose work runs inside a Docker or Podman container managed by signalk-container.

It provides the stated integration path for a SignalK plugin that needs to start or manage a container, instead of handling that connection from scratch.

signalk-container-helper — Plugin for Claude Code by sailingnaturali

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/sailingnaturali/claude-skills

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/sailingnaturali/claude-skills/signalk-container-helper/github.svg)](https://agentmods.dev/plugins/sailingnaturali/claude-skills/signalk-container-helper)

Your own site

<a href="https://agentmods.dev/plugins/sailingnaturali/claude-skills/signalk-container-helper"><img src="https://agentmods.dev/badge/plugins/sailingnaturali/claude-skills/signalk-container-helper/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/sailingnaturali/claude-skills/signalk-container-helper"><img src="https://agentmods.dev/badge/plugins/sailingnaturali/claude-skills/signalk-container-helper.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 113 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 original No closer match found in the catalogue.

Security

Grade A, and why

signalk-container-helper 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 10d 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.

signalk-container-helper/.claude-plugin/plugin.json · 9 lines

What it actually says

{
  "name": "signalk-container-helper",
  "description": "Build a SignalK plugin that runs a Docker/Podman container via the signalk-container manager, using the signalk-container-helper library.",
  "version": "0.1.0",
  "author": { "name": "Dirk Wahrheit" },
  "license": "MIT",
  "keywords": ["signalk", "marine", "container", "docker", "podman", "plugin"]
}

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 — 113 tokens a session between them. Each is measured on its own page, and each can be installed alone.

Skill signalk-container-helper A 113 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.

10d ago First seen · 9 lines scan A 362b0eb16e8d

Subscribe to this mod's changes

signalk-container-helper is a plugin published in the GitHub repository sailingnaturali/claude-skills (2 stars, last pushed 5d 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.

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