Search the AgentSkill catalog of installable AI-agent capabilities (skill files and small apps). Use when the user wants a capability the agent does not have — reading A-share/US market data, auditing code with a second model, transcribing audio, upscaling or de-watermarking images, cloning a site's design, deploying an overseas store, and so on. Returns name, module, form, price, version, size, and a direct download URL for free items.

Full detail for one capability by id: version, package size, last update, source repository, licence-relevant facts, and exactly how to obtain it. Call this before installing anything.

Overview of the catalog: the four modules, how many capabilities each holds, and what the two delivery forms mean.