CultCache interop: C# union and nested-bytes store read by Rust read-only, and back #139
2026-11-12
CultCache interop: C# and Rust write a union and nested bytes, the other reads them read-only
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Extends the existing cross-runtime harness (cultcache-ts interop test, C# and Rust interop peers) with write-shapes/read-shapes: a union field with two arms and bin members. Rust reads through the read-only snapshot door; leftover staging files of both runtimes sit beside the store and must survive the read, and the store bytes must not change. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>