By: Lucien Huber <im@lcnbr.ch>
reuse compatible per-crate compiler state Align existing Symbolica dependency features across test contexts. Prepare a pinned application's library/test compiler state with the current implementation and toolchain, then restore only that state alongside current dependency outputs. Keep full state snapshots separate from normal Crane artifact deltas and publish them through existing producer wrappers. Preserve package source boundaries, profiles, Python behavior and test selection. Main source-edit completion improves from 17m47s to 6m35s locally; native Cargo remains 3m47s. Exact inventories match: 1628 edited tests and 1633 full tests pass. Archive stages compile nothing, 64 materialized raw closures exclude compiler state, and an epoch-zero compile-error control fails as intended. FeynKit's seven invalidation scenarios remain unchanged. Remote and cold speedups are unmeasured. User prompt: do 1-4 together, (we should update to latest crane)