Frame payload Rust consumer

This package depends only on the generated safe owned-data SDK plus Serde for reading the committed corpus. Build the Project-v8 Rust target, then run the consumer:

cargo run --locked -p semaprax-toolchain --bin semaprax-full -- build --manifest-path examples/frame-payload-project/semaprax.toml --target rust -o examples/frame-payload-generated-sdk
cp examples/frame-payload-project/corpus.json examples/frame-payload-rust/corpus.json
cargo run --locked --offline --manifest-path examples/frame-payload-rust/Cargo.toml

The generated SDK is local evidence and must not be committed. Its public spx_frame_dot_payload_hyphen_result method is derived from the stable ID, not the SEMAPRAX display name.

Rust package generation requires the unpublished full-toolchain host above; the standalone semaprax binary deliberately rejects this target. The integration fixture runs Cargo with the external consumer as its working directory, so repository-local Cargo configuration is not inherited by configuration discovery.

The standalone consumer lock pins the existing repository Serde dependency versions and checksums, including derive feature edges. Its registry sources must already be cached on the host; offline execution must fail if they are absent. No dependency installation is part of the consumer acceptance gate. Both baseline and display-renamed integration fixtures copy this lock before execution and assert its bytes remain unchanged afterward.

The explicit msrv_handoff::provisioned_frame_consumer_handoff_binds_both_revisions gate uses the current Linux AArch64 compiler to authenticate both real Project revisions and then retains exactly two seven-file SDKs plus four unchanged four-file consumers. A separate compiler-free Linux AArch64 environment ran all four consumers with Rust/Cargo 1.85.1, --locked --offline, a read-only handoff and registry, no checkout mount or network, and a fresh target. It observed four exact success markers, empty stderr and unchanged bytes for all 30 input files.

This is local generated-package and consumer evidence for Rust 1.85.1. It is not a Rust 1.85 build of the compiler, exact Rust 1.85.0, Windows, hosted, published-SDK or minimum-supported-toolchain evidence.