diff --git a/docs/help/testing.md b/docs/help/testing.md
index 6cf3ae14246..7db025fcae0 100644
--- a/docs/help/testing.md
+++ b/docs/help/testing.md
@@ -79,6 +79,15 @@ Think of the suites as “increasing realism” (and increasing flakiness/cost):
   - `pnpm test` also passes `--isolate=false` at the wrapper level.
   - Opt back into Vitest file isolation with `OPENCLAW_TEST_ISOLATE=1 pnpm test`.
   - `OPENCLAW_TEST_NO_ISOLATE=0` or `OPENCLAW_TEST_NO_ISOLATE=false` also force isolated runs.
+- Fast-local iteration note:
+  - `pnpm test:changed` runs the wrapper with `--changed origin/main`.
+  - The base Vitest config marks the wrapper manifests/config files as `forceRerunTriggers` so changed-mode reruns stay correct when scheduler inputs change.
+  - Use `OPENCLAW_VITEST_FS_MODULE_CACHE=1` for repeated local reruns on a stable branch when transform cost dominates.
+- Perf-debug note:
+  - `pnpm test:perf:imports` enables Vitest import-duration reporting plus import-breakdown output.
+  - `pnpm test:perf:imports:changed` scopes the same profiling view to files changed since `origin/main`.
+  - `pnpm test:perf:profile:main` writes a main-thread CPU profile for Vitest/Vite startup and transform overhead.
+  - `pnpm test:perf:profile:runner` writes runner CPU+heap profiles for the unit suite with file parallelism disabled.
 
 ### E2E (gateway smoke)
 
diff --git a/docs/reference/test.md b/docs/reference/test.md
index 81f2c674344..c0a65ab60c6 100644
--- a/docs/reference/test.md
+++ b/docs/reference/test.md
@@ -11,11 +11,17 @@ title: "Tests"
 
 - `pnpm test:force`: Kills any lingering gateway process holding the default control port, then runs the full Vitest suite with an isolated gateway port so server tests don’t collide with a running instance. Use this when a prior gateway run left port 18789 occupied.
 - `pnpm test:coverage`: Runs the unit suite with V8 coverage (via `vitest.unit.config.ts`). Global thresholds are 70% lines/branches/functions/statements. Coverage excludes integration-heavy entrypoints (CLI wiring, gateway/telegram bridges, webchat static server) to keep the target focused on unit-testable logic.
+- `pnpm test:coverage:changed`: Runs unit coverage only for files changed since `origin/main`.
+- `pnpm test:changed`: runs the wrapper with `--changed origin/main`. The base Vitest config treats the wrapper manifests/config files as `forceRerunTriggers` so scheduler changes still rerun broadly when needed.
 - `pnpm test`: runs the full wrapper. It keeps only a small behavioral override manifest in git, then uses a checked-in timing snapshot to peel the heaviest measured unit files into dedicated lanes.
 - Unit files default to `threads` in the wrapper; keep fork-only exceptions documented in `test/fixtures/test-parallel.behavior.json`.
 - `pnpm test:channels` now defaults to `threads` via `vitest.channels.config.ts`; the March 22, 2026 direct full-suite control run passed clean without channel-specific fork exceptions.
 - `pnpm test:extensions` now defaults to `threads` via `vitest.extensions.config.ts`; the March 22, 2026 direct full-suite control run passed clean without extension-specific fork exceptions.
 - `pnpm test:extensions`: runs extension/plugin suites.
+- `pnpm test:perf:imports`: enables Vitest import-duration + import-breakdown reporting for the wrapper.
+- `pnpm test:perf:imports:changed`: same import profiling, but only for files changed since `origin/main`.
+- `pnpm test:perf:profile:main`: writes a CPU profile for the Vitest main thread (`.artifacts/vitest-main-profile`).
+- `pnpm test:perf:profile:runner`: writes CPU + heap profiles for the unit runner (`.artifacts/vitest-runner-profile`).
 - `pnpm test:perf:update-timings`: refreshes the checked-in slow-file timing snapshot used by `scripts/test-parallel.mjs`.
 - Gateway integration: opt-in via `OPENCLAW_TEST_INCLUDE_GATEWAY=1 pnpm test` or `pnpm test:gateway`.
 - `pnpm test:e2e`: Runs gateway end-to-end smoke tests (multi-instance WS/HTTP/node pairing). Defaults to `forks` + adaptive workers in `vitest.e2e.config.ts`; tune with `OPENCLAW_E2E_WORKERS=<n>` and set `OPENCLAW_E2E_VERBOSE=1` for verbose logs.
@@ -33,6 +39,7 @@ For local PR land/gate checks, run:
 If `pnpm test` flakes on a loaded host, rerun once before treating it as a regression, then isolate with `pnpm vitest run <path/to/test>`. For memory-constrained hosts, use:
 
 - `OPENCLAW_TEST_PROFILE=low OPENCLAW_TEST_SERIAL_GATEWAY=1 pnpm test`
+- `OPENCLAW_VITEST_FS_MODULE_CACHE=1 pnpm test:changed`
 
 ## Model latency bench (local keys)
 
diff --git a/package.json b/package.json
index ac233643122..d013112764f 100644
--- a/package.json
+++ b/package.json
@@ -691,11 +691,13 @@
     "test:all": "pnpm lint && pnpm build && pnpm test && pnpm test:e2e && pnpm test:live && pnpm test:docker:all",
     "test:auth:compat": "vitest run --config vitest.gateway.config.ts src/gateway/server.auth.compat-baseline.test.ts src/gateway/client.test.ts src/gateway/reconnect-gating.test.ts src/gateway/protocol/connect-error-details.test.ts",
     "test:build:singleton": "node scripts/test-built-plugin-singleton.mjs",
+    "test:changed": "pnpm test -- --changed origin/main",
     "test:channels": "vitest run --config vitest.channels.config.ts",
     "test:contracts": "pnpm test:contracts:channels && pnpm test:contracts:plugins",
     "test:contracts:channels": "OPENCLAW_TEST_PROFILE=low pnpm test -- src/channels/plugins/contracts",
     "test:contracts:plugins": "OPENCLAW_TEST_PROFILE=low pnpm test -- src/plugins/contracts",
     "test:coverage": "vitest run --config vitest.unit.config.ts --coverage",
+    "test:coverage:changed": "vitest run --config vitest.unit.config.ts --coverage --changed origin/main",
     "test:docker:all": "pnpm test:docker:live-models && pnpm test:docker:live-gateway && pnpm test:docker:onboard && pnpm test:docker:gateway-network && pnpm test:docker:qr && pnpm test:docker:doctor-switch && pnpm test:docker:plugins && pnpm test:docker:cleanup",
     "test:docker:cleanup": "bash scripts/test-cleanup-docker.sh",
     "test:docker:doctor-switch": "bash scripts/e2e/doctor-install-switch-docker.sh",
@@ -726,6 +728,10 @@
     "test:perf:budget": "node scripts/test-perf-budget.mjs",
     "test:perf:find-thread-candidates": "node scripts/test-find-thread-candidates.mjs",
     "test:perf:hotspots": "node scripts/test-hotspots.mjs",
+    "test:perf:imports": "OPENCLAW_VITEST_IMPORT_DURATIONS=1 OPENCLAW_VITEST_PRINT_IMPORT_BREAKDOWN=1 pnpm test",
+    "test:perf:imports:changed": "OPENCLAW_VITEST_IMPORT_DURATIONS=1 OPENCLAW_VITEST_PRINT_IMPORT_BREAKDOWN=1 pnpm test -- --changed origin/main",
+    "test:perf:profile:main": "node --cpu-prof --cpu-prof-dir=.artifacts/vitest-main-profile ./node_modules/vitest/vitest.mjs run --config vitest.unit.config.ts --no-file-parallelism",
+    "test:perf:profile:runner": "vitest run --config vitest.unit.config.ts --no-file-parallelism --execArgv=--cpu-prof --execArgv=--cpu-prof-dir=.artifacts/vitest-runner-profile --execArgv=--heap-prof --execArgv=--heap-prof-dir=.artifacts/vitest-runner-profile",
     "test:perf:update-memory-hotspots": "node scripts/test-update-memory-hotspots.mjs",
     "test:perf:update-timings": "node scripts/test-update-timings.mjs",
     "test:sectriage": "pnpm exec vitest run --config vitest.gateway.config.ts && vitest run --config vitest.unit.config.ts --exclude src/daemon/launchd.integration.test.ts --exclude src/process/exec.test.ts",
diff --git a/test/vitest-performance-config.test.ts b/test/vitest-performance-config.test.ts
new file mode 100644
index 00000000000..6f6fdd07ad3
--- /dev/null
+++ b/test/vitest-performance-config.test.ts
@@ -0,0 +1,34 @@
+import { describe, expect, it } from "vitest";
+import { loadVitestExperimentalConfig } from "../vitest.performance-config.ts";
+
+describe("loadVitestExperimentalConfig", () => {
+  it("returns an empty object when no perf flags are enabled", () => {
+    expect(loadVitestExperimentalConfig({})).toEqual({});
+  });
+
+  it("enables the filesystem module cache explicitly", () => {
+    expect(
+      loadVitestExperimentalConfig({
+        OPENCLAW_VITEST_FS_MODULE_CACHE: "1",
+      }),
+    ).toEqual({
+      experimental: {
+        fsModuleCache: true,
+      },
+    });
+  });
+
+  it("enables import timing output and import breakdown reporting", () => {
+    expect(
+      loadVitestExperimentalConfig({
+        OPENCLAW_VITEST_IMPORT_DURATIONS: "true",
+        OPENCLAW_VITEST_PRINT_IMPORT_BREAKDOWN: "1",
+      }),
+    ).toEqual({
+      experimental: {
+        importDurations: { print: true },
+        printImportBreakdown: true,
+      },
+    });
+  });
+});
diff --git a/test/vitest-scoped-config.test.ts b/test/vitest-scoped-config.test.ts
index 8713f0939dd..7f6310d508c 100644
--- a/test/vitest-scoped-config.test.ts
+++ b/test/vitest-scoped-config.test.ts
@@ -20,6 +20,13 @@ describe("createScopedVitestConfig", () => {
     const config = createScopedVitestConfig(["src/example.test.ts"]);
     expect(config.test?.isolate).toBe(false);
   });
+
+  it("passes through a scoped root dir when provided", () => {
+    const config = createScopedVitestConfig(["src/example.test.ts"], {
+      dir: "src",
+    });
+    expect(config.test?.dir).toBe("src");
+  });
 });
 
 describe("scoped vitest configs", () => {
diff --git a/vitest.config.ts b/vitest.config.ts
index 2341006a3df..558b588a3a9 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -3,6 +3,12 @@ import path from "node:path";
 import { fileURLToPath } from "node:url";
 import { defineConfig } from "vitest/config";
 import { pluginSdkSubpaths } from "./scripts/lib/plugin-sdk-entries.mjs";
+import {
+  behaviorManifestPath,
+  unitMemoryHotspotManifestPath,
+  unitTimingManifestPath,
+} from "./scripts/test-runner-manifest.mjs";
+import { loadVitestExperimentalConfig } from "./vitest.performance-config.ts";
 
 const repoRoot = path.dirname(fileURLToPath(import.meta.url));
 const isCI = process.env.CI === "true" || process.env.GITHUB_ACTIONS === "true";
@@ -37,6 +43,27 @@ export default defineConfig({
     unstubGlobals: true,
     pool: "forks",
     maxWorkers: isCI ? ciWorkers : localWorkers,
+    forceRerunTriggers: [
+      "package.json",
+      "pnpm-lock.yaml",
+      "test/setup.ts",
+      "scripts/test-parallel.mjs",
+      "scripts/test-runner-manifest.mjs",
+      "vitest.channel-paths.mjs",
+      "vitest.channels.config.ts",
+      "vitest.config.ts",
+      "vitest.e2e.config.ts",
+      "vitest.extensions.config.ts",
+      "vitest.gateway.config.ts",
+      "vitest.live.config.ts",
+      "vitest.performance-config.ts",
+      "vitest.scoped-config.ts",
+      "vitest.unit.config.ts",
+      "vitest.unit-paths.mjs",
+      behaviorManifestPath,
+      unitTimingManifestPath,
+      unitMemoryHotspotManifestPath,
+    ],
     include: [
       "src/**/*.test.ts",
       "extensions/**/*.test.ts",
@@ -154,5 +181,6 @@ export default defineConfig({
         "src/infra/tailscale.ts",
       ],
     },
+    ...loadVitestExperimentalConfig(),
   },
 });
diff --git a/vitest.extensions.config.ts b/vitest.extensions.config.ts
index 187e8e4ef25..71c4dad761a 100644
--- a/vitest.extensions.config.ts
+++ b/vitest.extensions.config.ts
@@ -23,6 +23,7 @@ export function loadIncludePatternsFromEnv(
 export default createScopedVitestConfig(
   loadIncludePatternsFromEnv() ?? ["extensions/**/*.test.ts"],
   {
+    dir: "extensions",
     pool: "threads",
     // Channel implementations live under extensions/ but are tested by
     // vitest.channels.config.ts (pnpm test:channels) which provides
diff --git a/vitest.gateway.config.ts b/vitest.gateway.config.ts
index b8f85a89bca..4e7d2fc20f5 100644
--- a/vitest.gateway.config.ts
+++ b/vitest.gateway.config.ts
@@ -1,3 +1,5 @@
 import { createScopedVitestConfig } from "./vitest.scoped-config.ts";
 
-export default createScopedVitestConfig(["src/gateway/**/*.test.ts"]);
+export default createScopedVitestConfig(["src/gateway/**/*.test.ts"], {
+  dir: "src/gateway",
+});
diff --git a/vitest.performance-config.ts b/vitest.performance-config.ts
new file mode 100644
index 00000000000..07f35946258
--- /dev/null
+++ b/vitest.performance-config.ts
@@ -0,0 +1,32 @@
+type EnvMap = Record<string, string | undefined>;
+
+const isEnabled = (value: string | undefined): boolean => {
+  const normalized = value?.trim().toLowerCase();
+  return normalized === "1" || normalized === "true";
+};
+
+export function loadVitestExperimentalConfig(env: EnvMap = process.env): {
+  experimental?: {
+    fsModuleCache?: true;
+    importDurations?: { print: true };
+    printImportBreakdown?: true;
+  };
+} {
+  const experimental: {
+    fsModuleCache?: true;
+    importDurations?: { print: true };
+    printImportBreakdown?: true;
+  } = {};
+
+  if (isEnabled(env.OPENCLAW_VITEST_FS_MODULE_CACHE)) {
+    experimental.fsModuleCache = true;
+  }
+  if (isEnabled(env.OPENCLAW_VITEST_IMPORT_DURATIONS)) {
+    experimental.importDurations = { print: true };
+  }
+  if (isEnabled(env.OPENCLAW_VITEST_PRINT_IMPORT_BREAKDOWN)) {
+    experimental.printImportBreakdown = true;
+  }
+
+  return Object.keys(experimental).length > 0 ? { experimental } : {};
+}
diff --git a/vitest.scoped-config.ts b/vitest.scoped-config.ts
index a34ad5e73c4..f15afe2863f 100644
--- a/vitest.scoped-config.ts
+++ b/vitest.scoped-config.ts
@@ -13,11 +13,12 @@ export function resolveVitestIsolation(
 
 export function createScopedVitestConfig(
   include: string[],
-  options?: { exclude?: string[]; pool?: "threads" | "forks" },
+  options?: { dir?: string; exclude?: string[]; pool?: "threads" | "forks" },
 ) {
   const base = baseConfig as unknown as Record<string, unknown>;
   const baseTest =
-    (baseConfig as { test?: { exclude?: string[]; pool?: "threads" | "forks" } }).test ?? {};
+    (baseConfig as { test?: { dir?: string; exclude?: string[]; pool?: "threads" | "forks" } })
+      .test ?? {};
   const exclude = [...(baseTest.exclude ?? []), ...(options?.exclude ?? [])];
 
   return defineConfig({
@@ -25,6 +26,7 @@ export function createScopedVitestConfig(
     test: {
       ...baseTest,
       isolate: resolveVitestIsolation(),
+      ...(options?.dir ? { dir: options.dir } : {}),
       include,
       exclude,
       ...(options?.pool ? { pool: options.pool } : {}),