Developer Guides

Material for contributors and for readers tracking PowerIO’s history: migrations from earlier releases, retired names, ABI and schema history, the crate graph, the checked architecture map, the compiler infrastructure lessons behind the design, matrix internals, the evaluation corpus, performance work, and the release process.

Current user documentation deliberately contains none of this: a page above this section teaches only the 0.10 surface. Anything that says “0.9”, “ABI 5”, or names a removed API lives here, in the changelog, or in the frozen compatibility code that upgrades old stored documents.