loop-optimization

90 / 100 · Low risk

Fine to try. Some of what it can do is expected: a coding skill usually runs build and test commands.

By athola/claude-night-market (GitHub) · coding · 350 stars · scanned at commit 4f94139

Decides hand-vs-compiler for loop transforms (unrolling, SIMD, fusion, branchless). Use when reviewing/authoring a hot loop or tempted to hand-optimize one.

Works with any agent that supports SKILL.md skills.

What this skill can do

Connects to the internet

The author does not mention this. It runs automatically when the plugin is installed.

Found in 8 places.

plugins/leyline/hooks/auto-star-repo.sh, line 85curl -fsS -o /dev/null -X PUT \
plugins/leyline/hooks/auto-star-repo.sh, line 147http_code=$(curl -s -o /dev/null -w "%{http_code}" \
plugins/leyline/hooks/hooks.json, line 56"matcher": "WebFetch|WebSearch|Bash",

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plugins/leyline/hooks/sanitize_external_content.py, line 4Scans tool outputs from external sources (WebFetch,
plugins/leyline/hooks/sanitize_external_content.py, line 5WebSearch, gh CLI) for prompt injection and code execution
plugins/leyline/hooks/sanitize_external_content.py, line 138"curl ",
plugins/leyline/hooks/sanitize_external_content.py, line 139"wget ",
plugins/leyline/hooks/sanitize_external_content.py, line 145if tool_name in ("WebFetch", "WebSearch"):

Runs commands on your computer

The author does not mention this. It runs automatically when the plugin is installed. Expected for a coding skill.

Found in 8 places.

plugins/leyline/hooks/fetch-recent-discussions.sh, line 207completed = subprocess.run(
plugins/leyline/hooks/fetch-recent-discussions.sh, line 212except subprocess.TimeoutExpired:
plugins/leyline/hooks/hooks.json, line 8"command": "\"${CLAUDE_PLUGIN_ROOT}/hooks/detect-git-platform.sh\"",

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plugins/leyline/hooks/hooks.json, line 17"command": "\"${CLAUDE_PLUGIN_ROOT}/hooks/supply_chain_check.py\"",
plugins/leyline/hooks/hooks.json, line 26"command": "\"${CLAUDE_PLUGIN_ROOT}/hooks/auto-star-repo.sh\"",
plugins/leyline/hooks/hooks.json, line 36"command": "\"${CLAUDE_PLUGIN_ROOT}/hooks/fetch-recent-discussions.sh\"",
plugins/leyline/hooks/hooks.json, line 48"command": "\"${CLAUDE_PLUGIN_ROOT}/hooks/noqa_guard.py\"",
plugins/leyline/hooks/hooks.json, line 60"command": "\"${CLAUDE_PLUGIN_ROOT}/hooks/sanitize_external_content.py\"",

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'loop-optimization' ] || [ -L ~/.agents/skills/'loop-optimization' ]; then echo 'A skill folder named loop-optimization already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/athola/claude-night-market' "$d" && git -C "$d" checkout --quiet '4f94139a2d325f14442a62dc0b4cd28b41dbb5ba' -- 'plugins/leyline/skills/loop-optimization' && mkdir -p ~/.agents/skills && cp -R "$d"/'plugins/leyline/skills/loop-optimization' ~/.agents/skills/'loop-optimization' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'loop-optimization' ~/.claude/skills/'loop-optimization' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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Score history

Date	Version	Score
2026-11-07	`4f94139`	100