celeste-python

Use whenever writing, modifying, reviewing, or debugging code involving Celeste, celeste-ai, celeste-python, import celeste, src/celeste, or withceleste app integrations. This includes providers, modalities, models, artifacts, MIME types, parameters, tools, multimodal messages, streaming, structured outputs, protocol/base URL support, OpenSpec changes, and tests. Always use this skill before inventing Celeste types, registries, model catalogs, provider abstractions, request/response shapes, or syntax.