SDK 2.4.0 release candidate 1

SDK 2.4.0 release candidate 1, a pre-release for testing. It is built by the release-candidate workflow from main at 48d7055 (run 39579241219), and every file carries a GitHub artifact attestation. It is not the signed sdk-v2.4.0 release: that follows once the remaining go gates pass. Plugin ABI 1.1 is unchanged; plugins built for 2.3.0 keep loading.

What 2.4.0 adds

• A stability promise. Every service is labelled Stable or Experimental (stability). Stable tables only grow; an Experimental table can later be replaced by a new major version, and the old one stays available for at least one further minor release.
• Host and UI services: sco.widgets 1.2 (stable node tags), sco.storage 1.1 (schema introspection), sco.diagnostics.publisher 1.0, DataCore packs with best-effort receipts and deep cloning.
• Game pack 0.8.0 on verified build 4.10.197.2878:
  • game.loadout 1.2: asynchronous equip.
  • game.inventory 1.1 and game.inventory.contents 1.0.
  • game.actor_stats 1.1 (29 reads) and game.actor_stats_write 1.0.
  • game.input 1.0: 1,297 actions, ids re-derived from the build.
  • game.gamerules 1.1 (15 parameters), game.build 1.0, game.entities 1.2, game.world.control 1.1.
  • game.audio 1.1 play_once.
  • Opt-in native DataCore and CVar reads.
• Native backends held, fail-closed: filtered single-hit rays, exact class-name entity lookup, value-change GameRules reads and fire-and-forget audio ship as contracts with synthetic providers; natively they answer unavailable.
• Developer kit:
  • The combined kit bundles the API catalogue and a stdio MCP discovery server.
  • Opt-in MCP tools search the guides and run the plugin checker, build and tests on your own project.
  • The scaffolder generates C, C++, C# and Lua plugins.
  • A plugin design guide comes with a provider/consumer example pair, and a community plugin directory lists plugins that live in their authors' own repositories.

Archives

Profile	File	SHA-256
core	sco-sdk-core-2.4.0.zip	68ca5ef213fe9be162b974dcb798a6da2402583daf369e26b26634b23d869f7d
game-sc (overlay)	sco-sdk-game-sc-0.8.0.zip	fafd2d2d4d86cf479c25a4623e94c7004b45e527e94dceb8354293c6a6b5a8f9
combined kit	sco-sdk-2.4.0.zip	124751534277b89f0516af1897919c3485923811596e159a1f683bb80b1c243b
core-source	sco-sdk-core-source-2.4.0.zip	f2f7c35591ed96090240466910e3db408953a9a4f6e0a16a36da83bc2a34ee62
host-source-sc	sco-sdk-host-source-sc-2.4.0.zip	5ca76ff9dac6bbaa183c6f308d610e08d9c1b0daf6ebda6458e222277406dfc6

Verify a download: sha256sum -c SHA256SUMS, and gh attestation verify <file> -R scubamount/sco-core.

Not yet

• Nothing new in 2.4.0 has been run in game. Static checks and synthetic tests are not in-game evidence.
• Still open before the final release: an outsider dry run (zip to a checked plugin, using only the docs and MCP) and an in-game smoke run.
• The signed approval, sdk-v2.4.0 tag and final publication come after that.

Progress on each gate: roadmap. Full notes: release notes.

Offline only: no connection to Cloud Imperium Games' servers. sco-core is independent and not affiliated with Cloud Imperium Games.