Arize Prompt Optimization Skill — All flags and the env var accept a space name (e.g., ) or a base64 space ID (e.g., ). Find yours with . Related skills - arize-prompts : Create, version, and label prompts in Prompt Hub with (JSON messages, providers, labels such as ). Use that skill when the artifact should live in Arize; use arize-prompt-optimization below to improve prompt text from traces, datasets, and experiments. Concepts Where Prompts Live in Trace Data LLM applications emit spans following OpenInference semantic conventions. Prompts are stored in different span attributes depending o…