Agent skill

Microsim Utils

Utility tools for MicroSim management including quality validation, screenshot capture, icon management, index page generation, iframe height synchronization, iframe control-visibility testing…

No licenceAuto-check passedTesting & QA

Install Microsim Utils

skills CLI

$ npx skills add dmccreary/ibook-skills --skill microsim-utils -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install dmccreary/ibook-skills microsim-utils --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/dmccreary/ibook-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/microsim-utils .claude/skills/microsim-utils && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "microsim-utils" agent skill from https://github.com/dmccreary/ibook-skills/tree/main/skills/microsim-utils into .claude/skills/microsim-utils/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "microsim-utils", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/dmccreary/ibook-skills/tree/main/skills/microsim-utils

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add dmccreary/ibook-skills --skill microsim-utils -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install dmccreary/ibook-skills microsim-utils --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/dmccreary/ibook-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/microsim-utils .agents/skills/microsim-utils && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "microsim-utils" agent skill from https://github.com/dmccreary/ibook-skills/tree/main/skills/microsim-utils into .agents/skills/microsim-utils/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "microsim-utils", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add dmccreary/ibook-skills --skill microsim-utils -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install dmccreary/ibook-skills microsim-utils --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/dmccreary/ibook-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/microsim-utils .cursor/skills/microsim-utils && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "microsim-utils" agent skill from https://github.com/dmccreary/ibook-skills/tree/main/skills/microsim-utils into .cursor/skills/microsim-utils/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "microsim-utils", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/dmccreary/ibook-skills.git --path skills/microsim-utils

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add dmccreary/ibook-skills --skill microsim-utils -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install dmccreary/ibook-skills microsim-utils --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/dmccreary/ibook-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/microsim-utils .gemini/skills/microsim-utils && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "microsim-utils" agent skill from https://github.com/dmccreary/ibook-skills/tree/main/skills/microsim-utils into .gemini/skills/microsim-utils/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "microsim-utils", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install dmccreary/ibook-skills microsim-utils

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add dmccreary/ibook-skills --skill microsim-utils -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/dmccreary/ibook-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/microsim-utils .github/skills/microsim-utils && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "microsim-utils" agent skill from https://github.com/dmccreary/ibook-skills/tree/main/skills/microsim-utils into .github/skills/microsim-utils/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "microsim-utils", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add dmccreary/ibook-skills --skill microsim-utils -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install dmccreary/ibook-skills microsim-utils --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/dmccreary/ibook-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/microsim-utils .opencode/skills/microsim-utils && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "microsim-utils" agent skill from https://github.com/dmccreary/ibook-skills/tree/main/skills/microsim-utils into .opencode/skills/microsim-utils/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "microsim-utils", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: microsim-utils
GitHub stars: 105
Token cost: ~5.4k tokens
SKILL.md length: 2,251 words
Files: 23 (incl. scripts, references, assets)
Skills in repo: 32
Repo updated: Oct 5, 2026
First seen: Oct 7, 2026
Licence: None found

At a glance

Utility tools for MicroSim management including quality validation, screenshot capture, icon management, index page generation, iframe height synchronization, iframe control-visibility testing…

Works in 3 steps: Identify Utility Type → Load the Matched Guide or Run the Script → Execute Utility
Tasks that involve Test coverage
SKILL.md covers Overview, When to Use This Skill, Step 1: Identify Utility Type and Step 2: Load the Matched Guide…, plus 3 more sections
Runs Python scripts from its folder; calls python3, pip and playwright

What it does

Microsim Utils is an agent skill from dmccreary/ibook-skills. Utility tools for MicroSim management including quality validation, screenshot capture, icon management, index page generation, iframe height synchronization, iframe control-visibility testing, visual layout review, and diagram/MicroSim coverage reports across chapters. Routes to the appropriate utility based on the task needed.

Its SKILL.md is about 5.4k tokens, which your agent loads only when the skill is triggered. The skill folder holds 25 other files, including scripts, reference files and assets (for example `TODO.md`, `assets/index-template.md` and `assets/metadata-template.json`).

It sits in Testing & QA, covering Test coverage.

When your agent uses it

Tasks that involve Test coverage

Example prompts

“/microsim-utils”

Requirements

Python 3

Workflow steps

3 steps, taken from the step headings in SKILL.md.

Identify Utility Type
Load the Matched Guide or Run the Script
Execute Utility

What it can do on your machine

Read from SKILL.md and the folder at commit 12cbb60. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships 2 files in scripts/ (Python, from the files we listed), which the agent can run.
Shell commands in SKILL.md call:
- python3
- pip
- playwright
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use pip, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Microsim Utils loads about 5.4k tokens when it runs, and up to ~29k if it reads all its reference files. Until then it costs about 86 tokens; SKILL.md has 2,251 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~86
When it runs · the whole SKILL.md, loaded when a task matches: ~5.4k
With references · SKILL.md plus every file in references/, read only if the agent opens them: ~29k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 2,251 words (~5,364 tokens).

name: microsim-utils
metadata.ibook.version: 1.0

Outline of SKILL.md

MicroSim Utilities
Overview
When to Use This Skill
Step 1: Identify Utility Type
Routing Table
Decision Tree
Iframe-height utilities at a glance
Step 2: Load the Matched Guide or Run the Script
Step 3: Execute Utility
Available Utilities
standardization.md
screen-capture.md
add-icons.md
index-generator.md
create-microsim-todo-json-files.py
scaffold-microsims-from-todo.py
sync-iframe-heights.py
iframe-auto-height.md
iframe-tester.md
layout-reviewer.md
Examples
Example 1: Quality Check
Example 2: Capture Screenshot
Example 3: Update Index
Example 4: Create TODO JSON Files
Example 5: Scaffold MicroSims from TODO JSON
Example 6: Fix Iframe Heights
Example 7: Set Up Iframe Auto-Resize
Example 8: Test Iframe Control Visibility
Example 9: Review a Sim's Visual Layout

Read the full SKILL.md on GitHub

Files

SKILL.md and 22 other files (scripts, references, assets) in skills/microsim-utils of dmccreary/ibook-skills.

SKILL.md
TODO.md
assets/index-template.md
assets/metadata-template.json
assets/microsim-schema.json
references/add-icons.md
references/canvas-height-strategy.md
references/common-fixes.md
references/diagram-reports.md
references/iframe-auto-height.md
references/iframe-tester.md
references/index-generator.md
references/layout-reviewer.md
references/screen-capture.md
references/standardization.md
references/visual-checklist.md
scripts/calculate-quality-score.py
scripts/create-microsim-todo-json-files.py
… and 5 more

Open the folder on GitHubat commit 12cbb60

Compare with similar skills

Microsim Utils next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Microsim Utils compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Microsim Utils this skilldmccreary/ibook-skills	105	—	~5.4k	Automated safety check: Pass	None	3 days ago
Requirementsrizsotto/Bear	6.5k	—	~2k	Automated safety check: Pass	GPL-3.0	yesterday
Crap Analysisardalis/RiverBooks	134	2 repos	~3.4k	Automated safety check: Pass	None	2 days ago
Code Coverages3s-project/s3s	311	—	~789	Automated safety check: Pass	Apache-2.0	today
Project Statusbactopia/bactopia	522	—	~787	Automated safety check: Pass	MIT	2 mo ago
Check Coverageldayton/Dippy	243	—	~403	Automated safety check: Pass	MIT	3 mo ago

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Questions about Microsim Utils

What does Microsim Utils do?

Utility tools for MicroSim management including quality validation, screenshot capture, icon management, index page generation, iframe height synchronization, iframe control-visibility testing…. Microsim Utils is an agent skill from dmccreary/ibook-skills. Utility tools for MicroSim management including quality validation, screenshot capture, icon management, index page generation, iframe height synchronization, iframe control-visibility testing, visual layout review, and diagram/MicroSim coverage reports across chapters.

When should I use Microsim Utils?

Microsim Utils fits situations like: tasks that involve Test coverage.

How do I install Microsim Utils in Claude Code?

Run `npx skills add dmccreary/ibook-skills --skill microsim-utils -a claude-code`. Or copy the skill folder (skills/microsim-utils in dmccreary/ibook-skills) into .claude/skills/microsim-utils in your project. Claude Code loads it when a task matches its description.

How do I install Microsim Utils in Codex?

Run `npx skills add dmccreary/ibook-skills --skill microsim-utils -a codex`. Or copy the skill folder (skills/microsim-utils in dmccreary/ibook-skills) into .agents/skills/microsim-utils in your project. Codex loads it when a task matches its description.

Can I use Microsim Utils in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add dmccreary/ibook-skills --skill microsim-utils -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/microsim-utils, .gemini/skills/microsim-utils, .github/skills/microsim-utils and .opencode/skills/microsim-utils in your project.

What does Microsim Utils need to run?

Going by SKILL.md and its folder, Microsim Utils needs Python for the scripts in its folder and the command-line tools its instructions call (python3, pip and playwright). Our summary lists: Python 3.

Does Microsim Utils access the network?

SKILL.md contains no URLs. Its commands use pip, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Microsim Utils safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Microsim Utils use?

No licence was found for Microsim Utils or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Microsim Utils use?

About 5.4k tokens (SKILL.md is roughly 21k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 24k tokens, read only when the agent opens those files.

What are the alternatives to Microsim Utils?

Skills that share tags, products or a category with Microsim Utils: Requirements (rizsotto/Bear, 6.5k stars), Crap Analysis (ardalis/RiverBooks, 134 stars), Code Coverage (s3s-project/s3s, 311 stars) and Project Status (bactopia/bactopia, 522 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Microsim Utils?

dmccreary (a GitHub user) maintains it in dmccreary/ibook-skills, which has 105 GitHub stars. The repository holds 32 skills in this directory. The repository was last updated on October 5, 2026.

Source: dmccreary/ibook-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Microsim Utils

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Files

Compare with similar skills

Similar skills

More from dmccreary/ibook-skills

Related

Questions about Microsim Utils