Extend teams with Skills support

Skills—reusable, instruction-based capability modules—can now be attached to Teams directly via the skills parameter, giving the team leader access to domain expertise without delegating to a member agent. The leader receives skill summaries injected into its system prompt and three skill tools (get_skill_instructions, get_skill_reference, get_skill_script) that let it discover and use skills on demand during a run.

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Details:

Attach skills to a Team via skills=Skills(loaders=[LocalSkills(...)]), using any SkillLoader such as LocalSkills
Skills are surfaced to the team leader only — member agents retain their own independent skill configurations
Use team-level skills when the leader needs domain expertise to coordinate (e.g., review standards, routing rules); attach skills to individual member agents when specialists need expertise to execute their own work; both can coexist
Skills follow the same pattern as knowledge, memory, and tools: get_tools() adds skill tools to the leader's tool list and get_system_prompt_snippet() injects skill metadata into the leader's system prompt
Shared skill directories can be reused across agents and teams without duplication

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See Team Skills docs for reference