[campegg]blomberg others here are way better placed to answer, but no, the IndieWeb is not an SDK. Conceptually, it’s completely software/language agnostic—more about following a set of principles (https://indieweb.org/principles) to guide *how* we think about and approach building; *what* you choose to build with is totally your call
LoqiEncouraging a plurality of projects with a self-motivated incentive to interoperate is a key principle of the indie web, in contrast to monoculture efforts which require or even encourage everyone to install the same software, or use the same online service, in order to interoperate https://indieweb.org/plurality
[aciccarello]blomberg, there are a collection of standards that allow websites to interoperate. The getting started page has a whole collection of links to services and software that support the standards that enable things like owning your data
LoqiThe IndieWeb is a community of independent & personal websites connected by simple standards, based on the principles of: owning your domain & using it as your primary identity, publishing on your own site (optionally syndicating elsewhere), and owning your data https://indieweb.org/IndieWeb
[tantek]4blomberg, since you asked about an SDK, it sounds like you might appreciate the #indieweb-dev channel where we discuss how to develop & improve IndieWeb software
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