Node Memory Leak Hunting

Q: What is a Claude Code skill and how does the Node Memory Leak Hunting skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Node Memory Leak Hunting is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Engineering · Sub-category: performance · Last updated: 2026-06-08

lang:javascript

Use when a Node.js process is growing memory unbounded in production, hits OOM, restarts on schedule, or shows monotonic RSS in Grafana. Triggers: heap snapshot diff (Comparison mode in Chrome DevTools), v8.writeHeapSnapshot, --heapsnapshot-signal=SIGUSR2, clinic doctor / clinic heap, Allocation sampling vs Allocation instrumentation timeline, --max-old-space-size, retainers / dominators, EventEmitter listener leak, closures over big objects, Buffer.allocUnsafe, intern caches that never evict. NOT for CPU profiling (use clinic doctor for the smoke signal then a CPU-specific skill), Go pprof, browser-side memory leaks, or worker_threads-only debugging.

About this skill (catalog notes)

Node Memory Leak Hunting includes 12 code blocks for direct copy-paste. At roughly 2,099 words the SKILL.md is on the longer end of the catalog distribution.

Original author: curiositech
Indexed lastmod: 2026-06-08
Catalog position: Engineering · performance
Indexed related skills: 10

How Node Memory Leak Hunting fits the catalog

Node Memory Leak Hunting sits in the Engineering category under the performance sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

From the source SKILL.md

A leak in Node.js is "RSS goes up, never comes down." V8 garbage-collects what it can prove is unreachable; a leak means something is still reachable that you didn't expect. The single most powerful tool, recommended by the Node.js diagnostics docs and the practitioner field, is the two-snapshot diff in Chrome DevTools' Memory tab. ([Node.js — Using Heap Snapshot][node-heap-snapshot])

1. Confirm the leak (Grafana shows monotonic RSS over hours).
2. Snapshot before load.
3. Drive load that exercises the suspect path.
4. Snapshot after.
5. Open both in DevTools → Memory tab → Comparison mode.
6. Sort by "Delta" desc. The retained, growing constructor at the top is your leak.

What this skill does

Node Memory Leak Hunting is a community-contributed Claude Code skill in the performance sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/node-memory-leak-hunting/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when a Node.js process is growing memory unbounded in production, hits OOM, restarts on schedule, or shows monotonic RSS in Grafana.

Who uses this skill

The Node Memory Leak Hunting Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 94,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/node-memory-leak-hunting
curl -L https://claudskills.com/skills/node-memory-leak-hunting/SKILL.md \
  -o ~/.claude/skills/node-memory-leak-hunting/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/node-memory-leak-hunting/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/node-memory-leak-hunting/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\node-memory-leak-hunting\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Node Memory Leak Hunting Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/node-memory-leak-hunting/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Node Memory Leak Hunting skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Node Memory Leak Hunting skill?

Use Node Memory Leak Hunting when your Claude Code task falls under the Engineering category — specifically in the performance area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Node Memory Leak Hunting" or describe the task and let Claude pick). Browse related skills at /category/engineering/.

What is a Claude Code skill and how does the Node Memory Leak Hunting skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Node Memory Leak Hunting is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/curiositech/windags-skills/blob/HEAD/skills/node-memory-leak-hunting/SKILL.md
Author: curiositech

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

curiositech. (2026). Node Memory Leak Hunting [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/node-memory-leak-hunting/

BibTeX

@misc{node-memory-leak-hunting-2026,
  author    = {curiositech},
  title     = {Node Memory Leak Hunting [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/node-memory-leak-hunting/}
}

Embed this skill

Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →

Badge

[![ClaudSkills](https://claudskills.com/badge/node-memory-leak-hunting.svg)](https://claudskills.com/skills/node-memory-leak-hunting/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)

More Engineering skills

Browse all Engineering skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all Engineering skills → Top 100 skills

Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills. · What's New · Install guide · About · llms.txt

Part of Acreator Store — Adam Lankamer's AI tools: PerfectStudio · Ucaption · UTagger · AutoXPoster · TestYourSkills · AutomationFlows · Au Naturel · Telegram @acreatorstore