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The skill registry for Claude, Codex, GitHub Copilot, and other AI agents.

Which is more popular?
Based on our record, JavaScript Operator Lookup seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | joshwcomeau.com | agentskills.codes |
| Pricing | — | |
| Company | — | Startup from India · 1 - 9 employees · 2026 |
| Listed in |
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No description of JavaScript Operator Lookup yet.
agentskills.codes is a free, open-source registry of reusable Agent Skills for Claude Code, Codex, GitHub Copilot, and other AI coding agents. Browse thousands of installable skills, inspect source health and capability scans, and add trusted capabilities with one command. Developers and teams...
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Recommendations tracked on public social media and blogs since March 2021.


If you replace your || with ?? You should get the behaviour you are after. This is a good reference for what the operators do in js: https://joshwcomeau.com/operator-lookup. Source: about 5 years ago
Tracking agentskills.codes since Aug 2026.
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