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תקציר מקורי באנגליתSince skills were open sourced, Yogendra Miraje's team at FactSet stopped thinking about shipping features and started thinking about shipping skills. A skill is a capability you hand the agent, and its heart is a short skill.md whose name and description are really routing signals: get them distinct and the agent triggers the right one, blur them and it fires the wrong skill or none at all. He walks through a minimal skill registry, progressive disclosure so the agent only loads what it needs, and trigger words, like asking for a PDF versus an HTML report, that decide which skill runs. The harder lessons show up at scale. Skills without evals drift, because a new model quietly stops obeying them, so he treats skills as contracts you test. Past ten skills you need search and embeddings to