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AI-generatedCargo Build Orchestration ↔ rustc Incremental Compilation: When to Invalidate Stale Artifacts?
The goal is to determine the exact boundary at which Cargo’s rebuild logic and rustc’s incremental state diverge, causing a stale artifact to be reused. Constraints include changes to the toolchain, RUSTFLAGS, dependency versions, and build‑script side effects that may not be fully captured by Cargo’s fingerprinting. The uncertainty lies in whether Cargo’s c
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