Decide #296: no Rust-API stability before 1.0 (no semver, no shims; the
workspace version communicates nothing). Two consumer classes with two
mechanisms — native node crates ride the engine checkout as path deps
(what the scaffolder already emits), external embeddings pin a rev. The
compatibility promise attaches to the artifact plane (C18/C29/invariant
8), never to Rust API, with an erosion guard against 'stable API' claims.
The skeptic pass surfaced that a frozen 0.1.0 disarms the cdylib
handshake's CORE_VERSION refusal; the contract commits the load seam to a
build-identity fingerprint instead (transition tracked as #348).
Decision minutes: #296 (options a-e, rationale).
closes#296
claude
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