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Wasmtime v48.0.5
Vendoring of upstream Wasmtime v48.0.5. Focused Swift compatibility adaptation: explicit read-only/read-write filesystem modes; legacy read/read and read-write/read-write callers remain source-compatible. Independent or unknown legacy permission masks now fail with a clear configuration error instead of silently granting broader access. See COMPATIBILITY.md for migration. No unrelated wrapper features.
Validation
- macOS ARM64: release build; 83 tests; 100% line coverage.
- Linux ARM64: release build; 83 tests.
- Public Swift API comparison: 6 reviewed compatibility additions; no removed symbols.
- Fresh exact-version SwiftPM consumers pass on macOS and Linux ARM64 before release.
- Linux/Windows x86_64: not runtime-validated (optional runners unavailable).
- Existing Apple XCFramework and Linux/Windows artifact platforms preserved.
Upstream commit: 563544c6296610b1b3fbbe2e4643f9999899ec66. Release asset identities and SHA-256 digests were frozen and verified by vendoring.