Needle Haystack Context

Q: What is a Claude Code skill and how does the Needle Haystack Context 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. Needle Haystack Context 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: testing · Last updated: 2026-06-04

Needle-in-a-Haystack context placement testing for LLM retrieval accuracy. Context window stress tests, information placement strategies, lost-in-the-middle avoidance, and optimal document ordering for agent prompts. Sources: gkamradt/LLMTest_NeedleInAHaystack (MIT).

About this skill (catalog notes)

Needle Haystack Context includes explicit scope boundaries (an explicit 'when not to use' or 'out of scope' section); 5 code blocks for direct copy-paste. The SKILL.md is on the shorter side at about 527 words.

Original author: phamlongh230-lgtm
Indexed lastmod: 2026-06-04
Catalog position: Engineering · testing
Indexed related skills: 10

How Needle Haystack Context fits the catalog

Needle Haystack Context sits in the Engineering category under the testing 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.

What this skill does

Needle Haystack Context is a community-contributed Claude Code skill in the testing sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/needle-haystack-context/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Needle Haystack Context 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 93,000+ 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/needle-haystack-context
curl -L https://claudskills.com/skills/needle-haystack-context/SKILL.md \
  -o ~/.claude/skills/needle-haystack-context/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/needle-haystack-context/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/needle-haystack-context/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\needle-haystack-context\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 Needle Haystack Context Claude Code skill?

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

What does the Needle Haystack Context 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 Needle Haystack Context skill?

Use Needle Haystack Context when your Claude Code task falls under the Engineering category — specifically in the testing 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 Needle Haystack Context" or describe the task and let Claude pick). Browse related skills at /category/engineering/.

What is a Claude Code skill and how does the Needle Haystack Context 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. Needle Haystack Context 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/phamlongh230-lgtm/yamtam-engine/blob/HEAD/.claude/skills/needle-haystack-context/SKILL.md
Author: phamlongh230-lgtm

Cite this skill

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

APA

phamlongh230-lgtm. (2026). Needle Haystack Context [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/needle-haystack-context/

BibTeX

@misc{needle-haystack-context-2026,
  author    = {phamlongh230-lgtm},
  title     = {Needle Haystack Context [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/needle-haystack-context/}
}

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Browse all Engineering skills → Top 100 skills

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