gh-aw-workshop: Skill for Claude Code

.github/skills/micro-environment-simulator/SKILL.md

micro-environment-simulator is a skill for Claude Code from githubnext/gh-aw-workshop. It costs 27 tokens per session (1,119 once invoked), scanned A, original, no licence file.

A tool for building a small JavaScript model of an environment as an abstract state machine, which represents states and the transitions between them.

In plain words
What is it for?
Use it to replay workshop instructions and check that the required environment states and transitions are possible.
Why use it?
It helps reveal whether the assumed environment changes correctly as a sequence of workshop steps is replayed.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter.

This is githubnext/gh-aw-workshop's own configuration. It tells Claude Code how to work on gh-aw-workshop itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything gh-aw-workshop configures →

Reuse

Borrowing it

Nothing to install: this file belongs to githubnext/gh-aw-workshop. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/githubnext/gh-aw-workshop/main/.github/skills/micro-environment-simulator/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/githubnext/gh-aw-workshop

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.

agentmods badge for micro-environment-simulator

README.md
[![agentmods](https://agentmods.dev/badge/skills/githubnext/gh-aw-workshop/micro-environment-simulator/github.svg)](https://agentmods.dev/skills/githubnext/gh-aw-workshop/micro-environment-simulator)
Your own site
<a href="https://agentmods.dev/skills/githubnext/gh-aw-workshop/micro-environment-simulator"><img src="https://agentmods.dev/badge/skills/githubnext/gh-aw-workshop/micro-environment-simulator/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 micro-environment-simulator

Your own site · 80×15
<a href="https://agentmods.dev/skills/githubnext/gh-aw-workshop/micro-environment-simulator"><img src="https://agentmods.dev/badge/skills/githubnext/gh-aw-workshop/micro-environment-simulator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 27 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,119 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 $0.00027 $0.01119
Opus 5.5 $0.00011 $0.00448
Sonnet 5.5 $0.00005 $0.00224
Haiku 4.5 $0.00003 $0.00112

Measured 1mo ago against content hash 870315dfeab9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

micro-environment-simulator 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.

The scan reads SKILL.md. This mod also ships 3 executable files (simulator.js, simulator.test.js, workshop-student-journey.js), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

.github/skills/micro-environment-simulator/SKILL.md · 117 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

4 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. 1mo ago First seen · 117 lines · 27 tokens per session scan A 870315dfeab9

Subscribe to this mod's changes

micro-environment-simulator is a skill published in the GitHub repository githubnext/gh-aw-workshop (56 stars, last pushed today), with no licence file. It adds 27 tokens to every session and 1,119 once invoked, about $0.0001 per session on Opus 5.5. 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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