diff --git a/package.json b/package.json
index 546469dfcdf9..635c86dada26 100644
--- a/package.json
+++ b/package.json
@@ -1943,7 +1943,7 @@
     "tsgo:all": "node scripts/run-tsgo.mjs -b tsconfig.projects.json",
     "tsgo:core": "node scripts/run-tsgo.mjs -p tsconfig.core.json --incremental --tsBuildInfoFile .artifacts/tsgo-cache/core.tsbuildinfo",
     "tsgo:core:all": "node scripts/run-tsgo.mjs -b tsconfig.core.projects.json",
-    "tsgo:core:test": "node scripts/run-tsgo.mjs -b test/tsconfig/tsconfig.core.test.projects.json",
+    "tsgo:core:test": "node scripts/run-tsgo-core-test-shards.mjs",
     "tsgo:extensions": "node scripts/run-tsgo.mjs -p tsconfig.extensions.json --incremental --tsBuildInfoFile .artifacts/tsgo-cache/extensions.tsbuildinfo",
     "tsgo:extensions:all": "node scripts/run-tsgo.mjs -b tsconfig.extensions.projects.json",
     "tsgo:extensions:test": "node scripts/run-tsgo.mjs -p test/tsconfig/tsconfig.extensions.test.json --incremental --tsBuildInfoFile .artifacts/tsgo-cache/extensions-test.tsbuildinfo",
@@ -1952,10 +1952,10 @@
     "tsgo:scripts": "node scripts/run-tsgo.mjs -p tsconfig.scripts.json --incremental --tsBuildInfoFile .artifacts/tsgo-cache/scripts.tsbuildinfo",
     "tsgo:test": "pnpm tsgo:core:test && pnpm tsgo:extensions:test && pnpm tsgo:test:root",
     "tsgo:test:extensions": "pnpm tsgo:extensions:test",
-    "tsgo:test:packages": "node scripts/run-tsgo.mjs -p test/tsconfig/tsconfig.test.packages.json --incremental --tsBuildInfoFile .artifacts/tsgo-cache/test-packages.tsbuildinfo",
+    "tsgo:test:packages": "node scripts/run-tsgo-core-test-shards.mjs packages",
     "tsgo:test:root": "node scripts/run-tsgo.mjs -p test/tsconfig/tsconfig.test.root.json --incremental --tsBuildInfoFile .artifacts/tsgo-cache/test-root.tsbuildinfo",
-    "tsgo:test:src": "node scripts/run-tsgo.mjs -b test/tsconfig/tsconfig.core.test.src.projects.json",
-    "tsgo:test:ui": "node scripts/run-tsgo.mjs -b test/tsconfig/tsconfig.core.test.ui.projects.json",
+    "tsgo:test:src": "node scripts/run-tsgo-core-test-shards.mjs src",
+    "tsgo:test:ui": "node scripts/run-tsgo-core-test-shards.mjs ui",
     "tsgo:ui": "node scripts/run-tsgo.mjs -p tsconfig.ui.json --incremental --tsBuildInfoFile .artifacts/tsgo-cache/ui.tsbuildinfo",
     "tui": "node scripts/run-node.mjs tui",
     "tui:dev": "node --import tsx scripts/run-with-env.mts OPENCLAW_PROFILE=dev -- node scripts/run-node.mjs --dev tui",
diff --git a/scripts/lib/tsgo-core-test-shards.mts b/scripts/lib/tsgo-core-test-shards.mts
index f554e814013e..48c6ea8e207e 100644
--- a/scripts/lib/tsgo-core-test-shards.mts
+++ b/scripts/lib/tsgo-core-test-shards.mts
@@ -1,25 +1,43 @@
 export const TSGO_CORE_TEST_MAX_ROOTS = 720;
 
 export const TSGO_CORE_TEST_SHARDS = [
-  { name: "agents-root", config: "test/tsconfig/tsconfig.core.test.agents-root.json" },
-  { name: "agents-other", config: "test/tsconfig/tsconfig.core.test.agents-other.json" },
-  { name: "gateway", config: "test/tsconfig/tsconfig.core.test.gateway.json" },
-  { name: "infra", config: "test/tsconfig/tsconfig.core.test.infra.json" },
-  { name: "commands", config: "test/tsconfig/tsconfig.core.test.commands.json" },
+  {
+    name: "agents-root",
+    group: "src",
+    config: "test/tsconfig/tsconfig.core.test.agents-root.json",
+  },
+  {
+    name: "agents-other",
+    group: "src",
+    config: "test/tsconfig/tsconfig.core.test.agents-other.json",
+  },
+  { name: "gateway", group: "src", config: "test/tsconfig/tsconfig.core.test.gateway.json" },
+  { name: "infra", group: "src", config: "test/tsconfig/tsconfig.core.test.infra.json" },
+  { name: "commands", group: "src", config: "test/tsconfig/tsconfig.core.test.commands.json" },
   {
     name: "plugins-platform",
+    group: "src",
     config: "test/tsconfig/tsconfig.core.test.plugins-platform.json",
   },
-  { name: "config-cli", config: "test/tsconfig/tsconfig.core.test.config-cli.json" },
-  { name: "messaging", config: "test/tsconfig/tsconfig.core.test.messaging.json" },
-  { name: "services", config: "test/tsconfig/tsconfig.core.test.services.json" },
-  { name: "other", config: "test/tsconfig/tsconfig.core.test.other.json" },
+  {
+    name: "config-cli",
+    group: "src",
+    config: "test/tsconfig/tsconfig.core.test.config-cli.json",
+  },
+  { name: "messaging", group: "src", config: "test/tsconfig/tsconfig.core.test.messaging.json" },
+  { name: "services", group: "src", config: "test/tsconfig/tsconfig.core.test.services.json" },
+  { name: "other", group: "src", config: "test/tsconfig/tsconfig.core.test.other.json" },
   {
     name: "ui-pages-e2e",
+    group: "ui",
     config: "test/tsconfig/tsconfig.core.test.ui-pages-e2e.json",
   },
-  { name: "ui-other", config: "test/tsconfig/tsconfig.core.test.ui-other.json" },
-  { name: "packages", config: "test/tsconfig/tsconfig.test.packages.json" },
+  { name: "ui-other", group: "ui", config: "test/tsconfig/tsconfig.core.test.ui-other.json" },
+  {
+    name: "packages",
+    group: "packages",
+    config: "test/tsconfig/tsconfig.test.packages.json",
+  },
 ] as const;
 
 export type TsgoCoreTestShard = (typeof TSGO_CORE_TEST_SHARDS)[number];
diff --git a/scripts/run-tsgo-core-test-shards.mjs b/scripts/run-tsgo-core-test-shards.mjs
new file mode 100644
index 000000000000..a98c7bd7d183
--- /dev/null
+++ b/scripts/run-tsgo-core-test-shards.mjs
@@ -0,0 +1,8 @@
+#!/usr/bin/env node
+
+import { runTsxCliShim } from "./lib/tsx-cli-shim.mjs";
+
+await runTsxCliShim(import.meta.url, {
+  implementation: "./run-tsgo-core-test-shards.mts",
+  failureTool: "tsgo:core:test",
+});
diff --git a/scripts/run-tsgo-core-test-shards.mts b/scripts/run-tsgo-core-test-shards.mts
new file mode 100644
index 000000000000..7981a529154d
--- /dev/null
+++ b/scripts/run-tsgo-core-test-shards.mts
@@ -0,0 +1,61 @@
+#!/usr/bin/env node
+
+// Run bounded test graphs in fresh processes so one shard's checker heap cannot
+// accumulate while the next shard loads. Hold one lock across the full sequence.
+import { spawnSync } from "node:child_process";
+import path from "node:path";
+import {
+  acquireLocalHeavyCheckLockSync,
+  resolveLocalHeavyCheckEnv,
+} from "./lib/local-heavy-check-runtime.mts";
+import { signalExitCode } from "./lib/managed-child-process.mts";
+import { resolveRepoRoot } from "./lib/repo-root.mjs";
+import { TSGO_CORE_TEST_SHARDS } from "./lib/tsgo-core-test-shards.mts";
+
+const repoRoot = resolveRepoRoot(import.meta.url);
+const requestedGroup = process.argv[2];
+const groups: ReadonlySet<string> = new Set(TSGO_CORE_TEST_SHARDS.map((shard) => shard.group));
+if (requestedGroup && !groups.has(requestedGroup)) {
+  console.error(`Unknown core test shard group: ${requestedGroup}`);
+  process.exit(1);
+}
+
+const shards = requestedGroup
+  ? TSGO_CORE_TEST_SHARDS.filter((shard) => shard.group === requestedGroup)
+  : TSGO_CORE_TEST_SHARDS;
+const env = resolveLocalHeavyCheckEnv(process.env);
+const releaseLock =
+  env.OPENCLAW_TSGO_HEAVY_CHECK_LOCK_HELD === "1"
+    ? () => {}
+    : acquireLocalHeavyCheckLockSync({
+        cwd: repoRoot,
+        env,
+        toolName: "tsgo:core:test",
+      });
+
+try {
+  for (const shard of shards) {
+    const result = spawnSync(
+      process.execPath,
+      [path.join(repoRoot, "scripts/run-tsgo.mjs"), "-b", shard.config, "--builders", "1"],
+      {
+        cwd: repoRoot,
+        env: { ...env, OPENCLAW_TSGO_HEAVY_CHECK_LOCK_HELD: "1" },
+        stdio: "inherit",
+      },
+    );
+    if (result.error) {
+      throw result.error;
+    }
+    if (result.signal) {
+      process.exitCode = signalExitCode(result.signal);
+      break;
+    }
+    if (result.status !== 0) {
+      process.exitCode = result.status ?? 1;
+      break;
+    }
+  }
+} finally {
+  releaseLock();
+}
diff --git a/test/tsconfig/tsconfig.core.test.shard.json b/test/tsconfig/tsconfig.core.test.shard.json
index 3214eb74db7f..274b710f92a7 100644
--- a/test/tsconfig/tsconfig.core.test.shard.json
+++ b/test/tsconfig/tsconfig.core.test.shard.json
@@ -1,5 +1,8 @@
 {
   "extends": "./tsconfig.core.test.json",
+  "compilerOptions": {
+    "incremental": true
+  },
   "files": [
     "../../src/config/sessions/session-entry.test-compat.d.ts",
     "../../src/infra/host-env-security-policy.d.ts",