From fe636ae265a070835caf3f0174a5067c64fb09ed Mon Sep 17 00:00:00 2001
From: Hongbin Li <hblee12294@gmail.com>
Date: Sun, 9 Aug 2026 23:03:23 -0700
Subject: [PATCH] chore(core): drop the unused VOS_VERSION constant from
 compiled output
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Every compiled module opened `initVos` with `const VOS_VERSION = <n>;` and
nothing ever read it — not the runtime, not the bridge, not any consumer.
Removing the emit also retires the `version` local that existed only to
interpolate into it.

The config's `version` field is untouched and still load-bearing: it is the
discriminator `migrateConfig` reads to upgrade older configs, and a required
field on `vosConfigJsonSchema`.
---
 .changeset/drop-dead-vos-version.md            | 5 +++++
 packages/core/src/compiler/compileVosConfig.ts | 3 ---
 2 files changed, 5 insertions(+), 3 deletions(-)
 create mode 100644 .changeset/drop-dead-vos-version.md

diff --git a/.changeset/drop-dead-vos-version.md b/.changeset/drop-dead-vos-version.md
new file mode 100644
index 0000000..36048ea
--- /dev/null
+++ b/.changeset/drop-dead-vos-version.md
@@ -0,0 +1,5 @@
+---
+'@vosjs/core': patch
+---
+
+Drop the unused `VOS_VERSION` constant from compiled output. Every compiled module opened by declaring `const VOS_VERSION = <n>;` inside `initVos`, and nothing ever read it — not the runtime, not the bridge, not any consumer. The config's `version` field keeps its real job as the `migrateConfig` discriminator; only the dead emit goes.
diff --git a/packages/core/src/compiler/compileVosConfig.ts b/packages/core/src/compiler/compileVosConfig.ts
index 6e90add..0a505c1 100644
--- a/packages/core/src/compiler/compileVosConfig.ts
+++ b/packages/core/src/compiler/compileVosConfig.ts
@@ -74,8 +74,6 @@ export function compileVosConfig(
     throw new Error(`Invalid VosConfigJson:\n${issues}`)
   }
 
-  const version = result.data.version
-
   // Detect which addons are actually needed by scanning function strings
   const detectedAddons = detectRequiredAddons(config)
   // Declarative gltf objects need the loader even though no function string
@@ -222,7 +220,6 @@ ${utilEntries}
 
 
 export const initVos = async (container, deps) => {
-  const VOS_VERSION = ${version};
   const { THREE, gsap, resolution } = deps;
 
   // Input data exposed as ctx.data (runtime deps.data overrides baked config.data; never undefined).