diff --git a/package.json b/package.json
index 2d9bdb29159..934376ff0fd 100644
--- a/package.json
+++ b/package.json
@@ -1246,7 +1246,7 @@
     "build": "node scripts/build-all.mjs",
     "build:ci-artifacts": "node scripts/build-all.mjs ciArtifacts",
     "build:docker": "node scripts/tsdown-build.mjs && node scripts/runtime-postbuild.mjs && node --import tsx scripts/write-npm-update-compat-sidecars.ts && node scripts/build-stamp.mjs && node --import tsx scripts/canvas-a2ui-copy.ts && node --import tsx scripts/copy-hook-metadata.ts && node --import tsx scripts/copy-export-html-templates.ts && node --import tsx scripts/write-build-info.ts && node --experimental-strip-types scripts/write-cli-startup-metadata.ts && node --import tsx scripts/write-cli-compat.ts",
-    "build:plugin-sdk:dts": "tsc -p tsconfig.plugin-sdk.dts.json",
+    "build:plugin-sdk:dts": "tsgo -p tsconfig.plugin-sdk.dts.json",
     "build:strict-smoke": "pnpm canvas:a2ui:bundle && node scripts/tsdown-build.mjs && node scripts/runtime-postbuild.mjs && node scripts/build-stamp.mjs && pnpm build:plugin-sdk:dts && node --import tsx scripts/write-plugin-sdk-entry-dts.ts && node scripts/check-plugin-sdk-exports.mjs",
     "canon:check": "node scripts/canon.mjs check",
     "canon:check:json": "node scripts/canon.mjs check --json",
diff --git a/scripts/prepare-extension-package-boundary-artifacts.mjs b/scripts/prepare-extension-package-boundary-artifacts.mjs
index 50ef935c3c8..ab36f22c573 100644
--- a/scripts/prepare-extension-package-boundary-artifacts.mjs
+++ b/scripts/prepare-extension-package-boundary-artifacts.mjs
@@ -5,7 +5,10 @@ import path, { resolve } from "node:path";
 
 const require = createRequire(import.meta.url);
 const repoRoot = resolve(import.meta.dirname, "..");
-const tscBin = require.resolve("typescript/bin/tsc");
+const tsgoBin = path.join(
+  path.dirname(require.resolve("@typescript/native-preview/package.json")),
+  "bin/tsgo.js",
+);
 const TYPE_INPUT_EXTENSIONS = new Set([".ts", ".tsx", ".d.ts", ".js", ".mjs", ".json"]);
 const VALID_MODES = new Set(["all", "package-boundary"]);
 
@@ -268,7 +271,7 @@ export async function main(argv = process.argv.slice(2)) {
         });
         pendingSteps.push({
           label: "plugin-sdk boundary dts",
-          args: [tscBin, "-p", "tsconfig.plugin-sdk.dts.json"],
+          args: [tsgoBin, "-p", "tsconfig.plugin-sdk.dts.json"],
           timeoutMs: 300_000,
           stampPath: ROOT_DTS_STAMP,
         });
@@ -283,7 +286,7 @@ export async function main(argv = process.argv.slice(2)) {
       });
       pendingSteps.push({
         label: "plugin-sdk package boundary dts",
-        args: [tscBin, "-p", "packages/plugin-sdk/tsconfig.json"],
+        args: [tsgoBin, "-p", "packages/plugin-sdk/tsconfig.json"],
         timeoutMs: 300_000,
         stampPath: PACKAGE_DTS_STAMP,
       });
diff --git a/scripts/write-plugin-sdk-entry-dts.ts b/scripts/write-plugin-sdk-entry-dts.ts
index 2f3186898e8..687e252c122 100644
--- a/scripts/write-plugin-sdk-entry-dts.ts
+++ b/scripts/write-plugin-sdk-entry-dts.ts
@@ -37,8 +37,9 @@ const RUNTIME_SHIMS: Partial<Record<string, string>> = {
   ].join("\n"),
 };
 
-// `tsc` emits declarations under `dist/plugin-sdk/src/plugin-sdk/*` because the source lives
-// at `src/plugin-sdk/*` and `rootDir` is `.` (repo root, to support cross-src/extensions refs).
+// TypeScript declaration emit writes files under `dist/plugin-sdk/src/plugin-sdk/*` because the
+// source lives at `src/plugin-sdk/*` and `rootDir` is `.` (repo root, to support
+// cross-src/extensions refs).
 //
 // Our package export map points subpath `types` at `dist/plugin-sdk/<entry>.d.ts`, so we
 // generate stable entry d.ts files that re-export the real declarations.