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sharded-counters

100 / 100 · Low risk

Fine to try.

By proyecto26/system-design-skills (GitHub) · design · 128 stars · scanned at commit 228d57d

This skill should be used when the user needs a "sharded counter", "distributed counter", to "count likes / views at scale", handles a "high-write counter" or "hot counter contention", asks about "approximate counting", "real-time counts", or "HyperLogLog". It gives the recipe for absorbing write-heavy counting without a single hot row. Use it whenever one row/key takes concurrent increments faster than it can serialize them, even if the user doesn't say "sharded counter".

Works with any agent that supports SKILL.md skills.

What this skill can do

We found nothing in the files we read that matches our rules. That does not prove the skill is safe: see the limits of static scanning.

Install

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

if [ -e ~/.agents/skills/'sharded-counters' ] || [ -L ~/.agents/skills/'sharded-counters' ]; then echo 'A skill folder named sharded-counters already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/proyecto26/system-design-skills' "$d" && git -C "$d" checkout --quiet '228d57dc6fa7627a6426553fdd6ad0040e36f361' -- 'skills/sharded-counters' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/sharded-counters' ~/.agents/skills/'sharded-counters' && 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/'sharded-counters' ~/.claude/skills/'sharded-counters' (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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