diff --git a/scripts/lib/local-heavy-check-runtime.mjs b/scripts/lib/local-heavy-check-runtime.mjs
index 320a8ff84fc..43eeff679f1 100644
--- a/scripts/lib/local-heavy-check-runtime.mjs
+++ b/scripts/lib/local-heavy-check-runtime.mjs
@@ -6,6 +6,7 @@ import path from "node:path";
 const GIB = 1024 ** 3;
 const DEFAULT_LOCAL_GO_GC = "30";
 const DEFAULT_LOCAL_GO_MEMORY_LIMIT = "3GiB";
+const DEFAULT_LOCAL_TSGO_BUILD_INFO_FILE = ".artifacts/tsgo-cache/root.tsbuildinfo";
 const DEFAULT_LOCK_TIMEOUT_MS = 10 * 60 * 1000;
 const DEFAULT_LOCK_POLL_MS = 500;
 const DEFAULT_LOCK_PROGRESS_MS = 15 * 1000;
@@ -26,6 +27,7 @@ export function hasFlag(args, name) {
 export function applyLocalTsgoPolicy(args, env, hostResources) {
   const nextEnv = { ...env };
   const nextArgs = [...args];
+  const defaultProjectRun = nextArgs.length === 0;
 
   if (!hasFlag(nextArgs, "--declaration") && !nextArgs.includes("-d")) {
     insertBeforeSeparator(nextArgs, "--declaration", "false");
@@ -35,6 +37,15 @@ export function applyLocalTsgoPolicy(args, env, hostResources) {
     return { env: nextEnv, args: nextArgs };
   }
 
+  if (defaultProjectRun) {
+    insertBeforeSeparator(nextArgs, "--incremental");
+    insertBeforeSeparator(
+      nextArgs,
+      "--tsBuildInfoFile",
+      nextEnv.OPENCLAW_TSGO_BUILD_INFO_FILE ?? DEFAULT_LOCAL_TSGO_BUILD_INFO_FILE,
+    );
+  }
+
   if (shouldThrottleLocalHeavyChecks(nextEnv, hostResources)) {
     insertBeforeSeparator(nextArgs, "--singleThreaded");
     insertBeforeSeparator(nextArgs, "--checkers", "1");
diff --git a/scripts/run-tsgo.mjs b/scripts/run-tsgo.mjs
index 5711903e6d3..2e5787b3707 100644
--- a/scripts/run-tsgo.mjs
+++ b/scripts/run-tsgo.mjs
@@ -1,4 +1,5 @@
 import { spawnSync } from "node:child_process";
+import fs from "node:fs";
 import path from "node:path";
 import {
   acquireLocalHeavyCheckLockSync,
@@ -8,6 +9,10 @@ import {
 const { args: finalArgs, env } = applyLocalTsgoPolicy(process.argv.slice(2), process.env);
 
 const tsgoPath = path.resolve("node_modules", ".bin", "tsgo");
+const tsBuildInfoFile = readFlagValue(finalArgs, "--tsBuildInfoFile");
+if (tsBuildInfoFile) {
+  fs.mkdirSync(path.dirname(path.resolve(tsBuildInfoFile)), { recursive: true });
+}
 const releaseLock = acquireLocalHeavyCheckLockSync({
   cwd: process.cwd(),
   env,
@@ -29,3 +34,16 @@ try {
 } finally {
   releaseLock();
 }
+
+function readFlagValue(args, name) {
+  for (let index = 0; index < args.length; index++) {
+    const arg = args[index];
+    if (arg === name) {
+      return args[index + 1];
+    }
+    if (arg.startsWith(`${name}=`)) {
+      return arg.slice(name.length + 1);
+    }
+  }
+  return undefined;
+}
diff --git a/test/scripts/local-heavy-check-runtime.test.ts b/test/scripts/local-heavy-check-runtime.test.ts
index 6a2b03f5a27..0413af769ce 100644
--- a/test/scripts/local-heavy-check-runtime.test.ts
+++ b/test/scripts/local-heavy-check-runtime.test.ts
@@ -31,7 +31,16 @@ describe("local-heavy-check-runtime", () => {
   it("tightens local tsgo runs on constrained hosts", () => {
     const { args, env } = applyLocalTsgoPolicy([], makeEnv(), CONSTRAINED_HOST);
 
-    expect(args).toEqual(["--declaration", "false", "--singleThreaded", "--checkers", "1"]);
+    expect(args).toEqual([
+      "--declaration",
+      "false",
+      "--incremental",
+      "--tsBuildInfoFile",
+      ".artifacts/tsgo-cache/root.tsbuildinfo",
+      "--singleThreaded",
+      "--checkers",
+      "1",
+    ]);
     expect(env.GOGC).toBe("30");
     expect(env.GOMEMLIMIT).toBe("3GiB");
   });
@@ -77,11 +86,41 @@ describe("local-heavy-check-runtime", () => {
   it("keeps local tsgo at full speed on roomy hosts in auto mode", () => {
     const { args, env } = applyLocalTsgoPolicy([], makeEnv(), ROOMY_HOST);
 
-    expect(args).toEqual(["--declaration", "false"]);
+    expect(args).toEqual([
+      "--declaration",
+      "false",
+      "--incremental",
+      "--tsBuildInfoFile",
+      ".artifacts/tsgo-cache/root.tsbuildinfo",
+    ]);
     expect(env.GOGC).toBeUndefined();
     expect(env.GOMEMLIMIT).toBeUndefined();
   });
 
+  it("uses the configured local tsgo build info file", () => {
+    const { args } = applyLocalTsgoPolicy(
+      [],
+      makeEnv({
+        OPENCLAW_TSGO_BUILD_INFO_FILE: ".artifacts/custom/tsgo.tsbuildinfo",
+      }),
+      ROOMY_HOST,
+    );
+
+    expect(args).toEqual([
+      "--declaration",
+      "false",
+      "--incremental",
+      "--tsBuildInfoFile",
+      ".artifacts/custom/tsgo.tsbuildinfo",
+    ]);
+  });
+
+  it("avoids incremental cache reuse for ad hoc tsgo runs", () => {
+    const { args } = applyLocalTsgoPolicy(["--extendedDiagnostics"], makeEnv(), ROOMY_HOST);
+
+    expect(args).toEqual(["--extendedDiagnostics", "--declaration", "false"]);
+  });
+
   it("allows forcing the throttled tsgo policy on roomy hosts", () => {
     const { args, env } = applyLocalTsgoPolicy(
       [],
@@ -91,7 +130,16 @@ describe("local-heavy-check-runtime", () => {
       ROOMY_HOST,
     );
 
-    expect(args).toEqual(["--declaration", "false", "--singleThreaded", "--checkers", "1"]);
+    expect(args).toEqual([
+      "--declaration",
+      "false",
+      "--incremental",
+      "--tsBuildInfoFile",
+      ".artifacts/tsgo-cache/root.tsbuildinfo",
+      "--singleThreaded",
+      "--checkers",
+      "1",
+    ]);
     expect(env.GOGC).toBe("30");
     expect(env.GOMEMLIMIT).toBe("3GiB");
   });