Agent skill

Vbook Extensions

by Darkrai9x in Darkrai9x/vbook-extensions

Compatibility entry for vBook extension creation, repair, testing, auditing, refactoring, building, and installation.

No licenceAuto-check passedDevelopment

Install Vbook Extensions

skills CLI
$ npx skills add Darkrai9x/vbook-extensions --skill vbook-extensions -a claude-code

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

GitHub CLI
$ gh skill install Darkrai9x/vbook-extensions vbook-extensions --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/Darkrai9x/vbook-extensions.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/vbook-extensions .claude/skills/vbook-extensions && 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/

Facts

Skill name
vbook-extensions
GitHub stars
108
Token cost
~167 tokens
SKILL.md length
52 words
Files
1
Skills in repo
2
Repo updated
First seen
Licence
None found

At a glance

Compatibility entry for vBook extension creation, repair, testing, auditing, refactoring, building, and installation.

  • Tasks that involve Refactoring
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Vbook Extensions is an agent skill from Darkrai9x/vbook-extensions. Compatibility entry for vBook extension creation, repair, testing, auditing, refactoring, building, and installation.

Its SKILL.md is about 170 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development, covering Refactoring.

When your agent uses it

  • Tasks that involve Refactoring

Example prompts

  • “/vbook-extensions”

What it can do on your machine

Read from SKILL.md and the folder at commit afbcb8b. 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

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    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

Vbook Extensions loads about 167 tokens when it runs. Until then it costs about 34 tokens; SKILL.md has 52 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~34
When it runs · the whole SKILL.md, loaded when a task matches
~167

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); files beside SKILL.md are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 52 words (~167 tokens).

name
vbook-extensions

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .claude/skills/vbook-extensions of Darkrai9x/vbook-extensions.

Open the folder on GitHubat commit afbcb8b

Compare with similar skills

Vbook Extensions 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.

Vbook Extensions compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Vbook Extensions this skillDarkrai9x/vbook-extensions108—~167Automated safety check: PassNone
Guidelinesakash-network/node1.1k20 repos~577Automated safety check: PassMIT
Migrate Core Code to Submodulestinyhumansai/openhuman42k—~2.6kAutomated safety check: PassGPL-3.0
Component Refactoringlangflow-ai/langflow155k—~3.5kAutomated safety check: PassMIT
Ponytail Lazy Developer ModeDietrichGebert/ponytail160k1 repos~873Automated safety check: PassMIT
ast-grep Structural Searchcode-yeongyu/oh-my-openagent70k—~3.3kAutomated safety check: PassMIT

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More from Darkrai9x/vbook-extensions

  • Vbook Extensions

    Darkrai9x/vbook-extensions

    Create, fix, test, audit, refactor, build, or install vBook extensions against the current engine API and ScriptExecutor runtime.

    108 GitHub stars~809 tokensUpdated today
    Auto-check passed

Categories

Questions about Vbook Extensions

What does Vbook Extensions do?

Compatibility entry for vBook extension creation, repair, testing, auditing, refactoring, building, and installation. Vbook Extensions is an agent skill from Darkrai9x/vbook-extensions. Compatibility entry for vBook extension creation, repair, testing, auditing, refactoring, building, and installation.

When should I use Vbook Extensions?

Vbook Extensions fits situations like: tasks that involve Refactoring.

How do I install Vbook Extensions in Claude Code?

Run `npx skills add Darkrai9x/vbook-extensions --skill vbook-extensions -a claude-code`. Or copy the skill folder (.claude/skills/vbook-extensions in Darkrai9x/vbook-extensions) into .claude/skills/vbook-extensions in your project. Claude Code loads it when a task matches its description.

How do I install Vbook Extensions in Codex?

Run `npx skills add Darkrai9x/vbook-extensions --skill vbook-extensions -a codex`. Or copy the skill folder (.claude/skills/vbook-extensions in Darkrai9x/vbook-extensions) into .agents/skills/vbook-extensions in your project. Codex loads it when a task matches its description.

Can I use Vbook Extensions 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 Darkrai9x/vbook-extensions --skill vbook-extensions -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/vbook-extensions, .gemini/skills/vbook-extensions, .github/skills/vbook-extensions and .opencode/skills/vbook-extensions in your project.

What does Vbook Extensions need to run?

SKILL.md names no scripts, command-line tools or credentials: Vbook Extensions is instructions for the agent only.

Does Vbook Extensions access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Vbook Extensions 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. Review the folder before installing.

What licence does Vbook Extensions use?

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

How many tokens does Vbook Extensions use?

About 167 tokens (SKILL.md is roughly 668 characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Vbook Extensions?

Skills that share tags, products or a category with Vbook Extensions: Guidelines (akash-network/node, 1.1k stars), Migrate Core Code to Submodules (tinyhumansai/openhuman, 42k stars), Component Refactoring (langflow-ai/langflow, 155k stars) and Ponytail Lazy Developer Mode (DietrichGebert/ponytail, 160k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Vbook Extensions?

Darkrai9x (a GitHub user) maintains it in Darkrai9x/vbook-extensions, which has 108 GitHub stars. The repository holds 2 skills in this directory. The repository was last updated on October 10, 2026.

Source: Darkrai9x/vbook-extensions on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.