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don-open-source

don-open-source is a skill for Claude Code from developer-overheid-nl/skills-developer-overheid-nl. It costs 40 tokens per session (505 once invoked), scanned A, original, EUPL-1.2.

Guidance for publishing software as open source for the Dutch government, including licences, repository files, and public-code standards.

In plain words
What is it for?
Use it when starting a Dutch government open-source repository, choosing between licences such as EUPL or MIT, or adding LICENSE, CONTRIBUTING.md, and publiccode.yml files.
Why use it?
It helps developers choose a suitable licence and prepare the documents an open-source government project needs.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the developer-overheid-nl-agent-skills plugin — 9 skills shipped together

not rated 11repo 3mo ago A scan 40 tokens EUPL-1.2

Good fit Use it when starting a Dutch government open-source repository, choosing between licences such as EUPL or MIT, or adding LICENSE, CONTRIBUTING.md, and publiccode.yml files.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/developer-overheid-nl/skills-developer-overheid-nl/don-open-source
View source ↗ developer-overheid-nl/skills-developer-overheid-nl
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.

Any agent
npx skills add developer-overheid-nl/skills-developer-overheid-nl --skill don-open-source
Clone the repo
git clone --depth 1 https://github.com/developer-overheid-nl/skills-developer-overheid-nl

Made for: Claude Code.

Or install developer-overheid-nl-agent-skills, the plugin that ships this one along with the rest of its 9 skills.

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.

agentmods badge for don-open-source

README.md
[![agentmods](https://agentmods.dev/badge/skills/developer-overheid-nl/skills-developer-overheid-nl/don-open-source/github.svg)](https://agentmods.dev/skills/developer-overheid-nl/skills-developer-overheid-nl/don-open-source)
Your own site
<a href="https://agentmods.dev/skills/developer-overheid-nl/skills-developer-overheid-nl/don-open-source"><img src="https://agentmods.dev/badge/skills/developer-overheid-nl/skills-developer-overheid-nl/don-open-source/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.

agentmods 80×15 button for don-open-source

Your own site · 80×15
<a href="https://agentmods.dev/skills/developer-overheid-nl/skills-developer-overheid-nl/don-open-source"><img src="https://agentmods.dev/badge/skills/developer-overheid-nl/skills-developer-overheid-nl/don-open-source.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 505 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00040 $0.00505
Opus 5 $0.00020 $0.00253
Sonnet 5 $0.00008 $0.00101
Haiku 4.5 $0.00004 $0.00051

Measured 9d ago against content hash f85c27489d95, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

don-open-source 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 9d 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.

skills/don-open-source/SKILL.md · 60 lines

The source is not reproduced here

Licensed EUPL-1.2

The repository is licensed EUPL-1.2, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Files

What ships with it

19 files beside SKILL.md 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.

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.

  1. 9d ago First seen · 60 lines · 40 tokens per session scan A f85c27489d95

Subscribe to this mod's changes

don-open-source is a skill published in the GitHub repository developer-overheid-nl/skills-developer-overheid-nl (11 stars, last pushed 3mo ago), licensed EUPL-1.2. It adds 40 tokens to every session and 505 once invoked, about $0.0002 per session on Opus 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 2026-08-30.

Git and workflowLegal and complianceagent-skillsclaude-code-pluginclaude-code-skills
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