Add registry-bound double-plant and moss placement, independent world RNG, survival ordering and post-write tick scheduling. Integrate named providers and feature graphs. Both pinned JARs matched 9,613,872 trace lines across 492,554 fixtures; workspace tests and all-target Clippy passed.
Add version-bound core, world data, geometry, generation and feature implementations with native client/server comparison tools and scoped evidence reports. Apply Horizon project branding.
Workspace tests, Clippy and 147 Python tests passed. Full 51-family survival and expanded provider comparisons are still running; complete gameplay parity and a playable Rust client remain unfinished. Private game artifacts and the isolated simple-block placement work are excluded.
Ludovic Marie