diff --git a/package.json b/package.json
index aba3c3fdb5e..4b462227999 100644
--- a/package.json
+++ b/package.json
@@ -1050,7 +1050,7 @@
     "canon:check:json": "node scripts/canon.mjs check --json",
     "canon:enforce": "node scripts/canon.mjs enforce --json",
     "canvas:a2ui:bundle": "bash scripts/bundle-a2ui.sh",
-    "check": "pnpm check:no-conflict-markers && pnpm tool-display:check && pnpm check:host-env-policy:swift && pnpm tsgo && pnpm build:plugin-sdk:dts && node --import tsx scripts/write-plugin-sdk-entry-dts.ts && pnpm lint && pnpm lint:webhook:no-low-level-body-read && pnpm lint:auth:no-pairing-store-group && pnpm lint:auth:pairing-account-scope",
+    "check": "pnpm check:no-conflict-markers && pnpm tool-display:check && pnpm check:host-env-policy:swift && pnpm tsgo && node scripts/prepare-extension-package-boundary-artifacts.mjs && pnpm lint && pnpm lint:webhook:no-low-level-body-read && pnpm lint:auth:no-pairing-store-group && pnpm lint:auth:pairing-account-scope",
     "check:base-config-schema": "node --import tsx scripts/generate-base-config-schema.ts --check",
     "check:bundled-channel-config-metadata": "node --import tsx scripts/generate-bundled-channel-config-metadata.ts --check",
     "check:docs": "pnpm format:docs:check && pnpm lint:docs && pnpm docs:check-i18n-glossary && pnpm docs:check-links",
diff --git a/scripts/prepare-extension-package-boundary-artifacts.mjs b/scripts/prepare-extension-package-boundary-artifacts.mjs
index cebde2d9143..095a7f817d1 100644
--- a/scripts/prepare-extension-package-boundary-artifacts.mjs
+++ b/scripts/prepare-extension-package-boundary-artifacts.mjs
@@ -28,6 +28,11 @@ function runNodeStep(label, args, timeoutMs) {
 }
 
 runNodeStep("plugin-sdk boundary dts", [tscBin, "-p", "tsconfig.plugin-sdk.dts.json"], 300_000);
+runNodeStep(
+  "plugin-sdk package boundary dts",
+  [tscBin, "-p", "packages/plugin-sdk/tsconfig.json"],
+  300_000,
+);
 runNodeStep(
   "plugin-sdk boundary root shims",
   ["--import", "tsx", resolve(repoRoot, "scripts/write-plugin-sdk-entry-dts.ts")],