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Nodejs Core

Checked
mcollina·vlatest·backend·MIT

This skill provides a robust Node.js environment for building server-side applications and APIs, streamlining backend development workflows.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add mcollina/skills --skill nodejs-core -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

mcollina

Taken from the source listing. We haven't verified who controls this account.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

  • No undeclared network calls: passed

    Makes no network calls.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

  • No obfuscated payloads: passed

    No encoded or obfuscated payloads.

    No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.

  • No credential access: passed

    Reads no keys, tokens, keychains or credential files.

    Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.

  • No pipe-to-shell installers: passed

    No pipe-to-shell or download-and-run installers.

    No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.

  • Pinned to a commit: passed

    Scanned mcollina/skills at 856efd268a.

    The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit
856efd268a
Manifest
skills/nodejs-core/SKILL.md
Scanned
30 files, 11,964 lines
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
What each check looks for →

About this skill

What it does

This skill provides deep expertise in Node.js internals, enabling an AI agent to assist with complex backend development tasks related to native modules, V8 engine optimization, libuv diagnostics, and C++ addon development. It covers areas like garbage collection, event loop phases, thread pool tuning, N-API bindings, and build system troubleshooting. The skill is organized into rule files containing code examples for various Node.js core components.

When to use it

  • Developing C++ addons for Node.js
  • Debugging issues within the V8 JavaScript engine
  • Troubleshooting problems related to the libuv event loop
  • Resolving build system and compilation failures in Node.js projects
  • Optimizing performance at a low level, specifically within the Node.js runtime environment
  • Understanding the underlying architecture of Node.js

Key capabilities

  • Expertise in V8 garbage collection (Scavenger, Mark-Sweep, Mark-Compact, generational GC)
  • Knowledge of hidden classes and inline caching optimization techniques
  • Understanding of JIT compilation and deoptimization patterns within V8
  • Detailed knowledge of libuv event loop phases and thread pool management
  • Proficiency in N-API and node-addon-api binding patterns for C++ addons
  • Guidance on build systems including node-gyp, gyp, and ninja.

Example prompts

  • "Explain how V8's generational garbage collection works."
  • "I'm getting performance regressions in my Node.js application; can you help me diagnose the issue related to the event loop?"
  • "How do I debug a segfault in my Node.js addon using gdb/lldb?"

Tips & gotchas

  • This skill is designed for developers with existing Node.js experience who need to delve into its internals.
  • The skill's knowledge is distributed across multiple rule files; consult the individual rules for specific topics and code examples.
  • Expect detailed technical explanations related to low-level engine behavior and C++ development practices.