Use this skill to pick the container behind an operation so its work scales correctly with input size, and to decide whether an existing structure should change. The canonical fix is replacing a per-element linear scan that runs once per element — an O(n²) shape — with a structure that makes the inner step O(1) or O(log n): a hash map/set, a sorted vector with binary search, or a balanced tree. The opposite is also a finding: a heavyweight node-based container used for a handful of elements where a flat array or linear scan is faster and lighter.
Cpp Data Structure Selection is a community-contributed Claude Code skill in the general-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/cpp-data-structure-selection/ and loads when your prompt matches the skill's trigger.
When to invoke it: Use when: choosing or replacing the C++ container/data structure behind a lookup, membership test, dedup, ordering, or accumulation, when a loop scans a collection that grows with input (linear scan, nested scan, repeated find), or when deciding between linear scan, hash map/set, sorted vector, balanced tree, or a small fixed table — including the crossover-size and measure-first reasoning.
The Cpp Data Structure Selection Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 196,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).
mkdir -p ~/.claude/skills/cpp-data-structure-selection curl -L https://claudskills.com/skills/cpp-data-structure-selection/SKILL.md \ -o ~/.claude/skills/cpp-data-structure-selection/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/cpp-data-structure-selection/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/cpp-data-structure-selection/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\cpp-data-structure-selection\SKILL.md on Windows. See the full install guide for step-by-step instructions.
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 →
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.
For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.
SKILL.md from the source repository to ~/.claude/skills/cpp-data-structure-selection/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.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. Cpp Data Structure Selection is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at /learn/what-is-a-claude-skill/.If you reference this skill in a blog post, paper, or documentation, you can cite it as:
@misc{cpp-data-structure-selection-2026,
author = {sjinks},
title = {Cpp Data Structure Selection [Claude Code skill]},
year = {2026},
publisher = {ClaudSkills},
url = {https://claudskills.com/skills/cpp-data-structure-selection/}
}Grade A · scanned 2026-09-28 — free static scan against the OWASP Agentic Skills Top 10.
No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›
Browse all General skills in the ClaudSkills registry, or explore these other picks from the same category:
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SKILL.md files, not affiliated with, endorsed by, or sponsored by Anthropic.