discover-public-apislisted

# Discover Public APIs Use this skill when an idea, feature, or requirement could be improved, simplified, or expanded by integrating an external API or public data source. This skill has two modes: 1. **Capability brainstorming** — during `refine-idea`, use public API catalogs to discover product capabilities the team may not have considered. 2. **Provider discovery** — during `discover-requirements` or technical validation, identify and compare providers that could satisfy an already-understood capability. The default discovery source is [`public-apis/public-apis`](https://github.com/public-apis/public-apis), but it is a lead generator only. Never treat inclusion in that repository as proof that an API is current, production-ready, free, safe, or suitable. ## Goal Help answer questions such as: - What useful external capabilities could strengthen this idea? - Is there an existing API that lets us validate the idea without building the capability ourselves? - What adjacent features become cheap to test because public APIs already exist? - Which providers appear viable for a required integration? - Should we build, buy, integrate, defer, or avoid the capability? The purpose is not to maximize integrations. Prefer a simpler product when an external capability does not materially improve user value or reduce delivery cost/risk. ## Capability brainstorming When called from `refine-idea`, start from the user problem and desired outcome rather than searching for arbitrar