Borrowing it
Nothing to install: this file belongs to calf-ai/calfkit-sdk. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/calf-ai/calfkit-sdk/main/.agents/skills/opensource-guide-coach/SKILL.mdgit clone --depth 1 https://github.com/calf-ai/calfkit-sdkWrote 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/skills/calf-ai/calfkit-sdk/opensource-guide-coach)<a href="https://agentmods.dev/skills/calf-ai/calfkit-sdk/opensource-guide-coach"><img src="https://agentmods.dev/badge/skills/calf-ai/calfkit-sdk/opensource-guide-coach/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/skills/calf-ai/calfkit-sdk/opensource-guide-coach"><img src="https://agentmods.dev/badge/skills/calf-ai/calfkit-sdk/opensource-guide-coach.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00060 | $0.01734 |
| Opus 5 | $0.00030 | $0.00867 |
| Sonnet 5 | $0.00012 | $0.00347 |
| Haiku 4.5 | $0.00006 | $0.00173 |
Grade A, and why
opensource-guide-coach 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- opensource-guide-coach — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 219 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Overview
Use the official Open Source Guides as a coaching framework for open source questions.
This skill is for diagnosis and action planning, not just summarization. Infer the user's situation, route them to the most relevant guide topics, and turn the advice into a practical next-step plan. Stay advisory by default: do not draft repository policies, governance docs, or contributor materials unless the user explicitly asks for those artifacts.
Source Of Truth
- Use the official Open Source Guides site: https://opensource.guide/
- Use
references/guide-map.mdto select the right topic quickly - Use
references/persona-router.mdto infer the closest audience persona - Use
references/attribution.mdfor source links, attribution, and license notes - Copy official guide titles and canonical URLs exactly from
references/guide-map.md
Treat the guides as curated community practice, not binding policy. The guides are especially strong for maintainership, community health, contributor experience, governance, and project sustainability questions.
When To Use
Use this skill when the user is trying to:
- decide whether or how to open source a project
- attract users or contributors
- improve onboarding or contribution flow
- reduce maintainer overload or burnout
- set governance or decision-making expectations
- adopt or enforce a code of conduct
- choose useful project metrics
- think about funding or sustainability
- understand open source legal basics
- tighten project security practices
Do not use this skill for:
- GitHub product how-to questions that need product docs
- repository-specific legal advice that requires a lawyer
- deep software security implementation guidance unrelated to open source project operations
Working Style
1. Identify the situation
Infer:
- the closest persona
- the project stage: considering launch, early launch, growing, overwhelmed, or formalizing
- the main pain point
- whether the user wants advice, a checklist, or actual drafted artifacts
What ships with it
3 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.
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.
- 9d ago First seen · 219 lines · 60 tokens per session scan A b3282d99655e
opensource-guide-coach is a skill published in the GitHub repository calf-ai/calfkit-sdk (146 stars, last pushed 8d ago), licensed Apache-2.0. It adds 60 tokens to every session and 1,734 once invoked, about $0.0003 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.
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