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Share legacy-world migration hooks on Forge 26.3 - #544
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SkyBlade1978
merged commit Nov 13, 2026
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MinecraftModDevelopmentMods:master-26.3
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This adds the shared legacy-world migration hook to Base Metals on Forge 26.3.
Compatible companion mods can take part in chunk and player conversion while
keeping their registry snapshots independent. Historical block-state fields
stay separate from the current Minecraft save format.
The release is 3.1.2.2603001. Existing registry IDs, gameplay, required Mixins
and the public OreSpawn 4.1.0 dependency pin are unchanged. No dependencies,
test probes or migration fixtures are bundled in the player jar.
The exact 26.3 family has passed the migration, current-world, machine, long-run
and client checks, followed by manual testing. The Base Metals main jar is
unchanged from that accepted build. Local dependency checks also cover the standalone public
OreSpawn pin, both Forge 66.0.0 and 66.1.0, and clean/offline reproduction.
This PR also updates the README and changelog for the release. Publication will
follow only after the PR and merged-source checks pass.