diff --git a/src/plugins/install-npm-resolution.ts b/src/plugins/install-npm-resolution.ts
new file mode 100644
index 000000000000..7dbf531597c1
--- /dev/null
+++ b/src/plugins/install-npm-resolution.ts
@@ -0,0 +1,46 @@
+import type { NpmSpecResolution } from "../infra/install-source-utils.js";
+import type { ManagedNpmRootInstalledDependency } from "../infra/npm-managed-root.js";
+
+type InstalledNpmResolutionVerification =
+  | { kind: "ok" }
+  | { kind: "incomplete"; error: string }
+  | { kind: "conflict"; error: string };
+
+export function verifyInstalledNpmResolution(params: {
+  packageName: string;
+  expected: NpmSpecResolution;
+  installed: ManagedNpmRootInstalledDependency | null;
+}): InstalledNpmResolutionVerification {
+  if (!params.installed) {
+    return {
+      kind: "incomplete",
+      error: `npm install did not record package-lock metadata for ${params.packageName}`,
+    };
+  }
+  if (params.expected.version && params.installed.version) {
+    if (params.installed.version !== params.expected.version) {
+      return {
+        kind: "conflict",
+        error: `npm install resolved ${params.packageName} to version ${params.installed.version}, expected ${params.expected.version}`,
+      };
+    }
+  }
+  if (params.expected.integrity && params.installed.integrity) {
+    if (params.installed.integrity !== params.expected.integrity) {
+      return {
+        kind: "conflict",
+        error: `npm install resolved ${params.packageName} with integrity ${params.installed.integrity}, expected ${params.expected.integrity}`,
+      };
+    }
+  }
+  if (
+    (params.expected.version && !params.installed.version) ||
+    (params.expected.integrity && !params.installed.integrity)
+  ) {
+    return {
+      kind: "incomplete",
+      error: `npm install recorded incomplete package-lock metadata for ${params.packageName}: ${params.expected.version && !params.installed.version ? "version" : "integrity"} missing`,
+    };
+  }
+  return { kind: "ok" };
+}
diff --git a/src/plugins/install.npm-spec.test.ts b/src/plugins/install.npm-spec.test.ts
index be7e47d2f551..3dda02117276 100644
--- a/src/plugins/install.npm-spec.test.ts
+++ b/src/plugins/install.npm-spec.test.ts
@@ -120,6 +120,13 @@ function isManagedNpmInstallCommand(argv: unknown): argv is string[] {
   return isNpmInstallCommand(argv) && !isNpmPeerPlannerInstallCommand(argv);
 }
 
+function managedNpmRootHasDependency(npmRoot: string, packageName: string): boolean {
+  const manifest = JSON.parse(fs.readFileSync(path.join(npmRoot, "package.json"), "utf8")) as {
+    dependencies?: Record<string, string>;
+  };
+  return packageName in (manifest.dependencies ?? {});
+}
+
 function expectNpmInstallIntoRoot(params: {
   calls: unknown[][];
   npmRoot: string;
@@ -302,6 +309,8 @@ type MockNpmPackage = {
   versions?: string[];
   installedVersion?: string;
   installedIntegrity?: string;
+  omitInstalledVersion?: boolean;
+  omitInstalledIntegrity?: boolean;
   materializesRootOpenClaw?: boolean;
   skipLockfileEntry?: boolean;
   packArchivePath?: string;
@@ -324,8 +333,10 @@ function writeNpmRootPackageLock(params: {
       continue;
     }
     lockPackages[`node_modules/${pkg.packageName}`] = {
-      version: pkg.installedVersion ?? pkg.version,
-      integrity: pkg.installedIntegrity ?? pkg.integrity ?? "sha512-plugin-test",
+      ...(pkg.omitInstalledVersion ? {} : { version: pkg.installedVersion ?? pkg.version }),
+      ...(pkg.omitInstalledIntegrity
+        ? {}
+        : { integrity: pkg.installedIntegrity ?? pkg.integrity ?? "sha512-plugin-test" }),
     };
     if (pkg.materializesRootOpenClaw) {
       lockPackages["node_modules/openclaw"] = {
@@ -1205,6 +1216,10 @@ describe("installPluginFromNpmSpec", () => {
 
   it("rejects npm installs when the installed artifact drifts from verified metadata", async () => {
     const npmRoot = path.join(suiteTempRootTracker.makeTempDir(), "npm");
+    const npmProjectRoot = resolvePluginNpmProjectDir({
+      npmDir: npmRoot,
+      packageName: "drift-plugin",
+    });
     mockNpmViewAndInstall({
       spec: "drift-plugin@latest",
       packageName: "drift-plugin",
@@ -1216,6 +1231,21 @@ describe("installPluginFromNpmSpec", () => {
       npmRoot,
       expectedDependencySpec: "1.0.0",
     });
+    const delegate = runCommandWithTimeoutMock.getMockImplementation();
+    if (!delegate) {
+      throw new Error("expected npm mock implementation");
+    }
+    let managedInstallAttempts = 0;
+    runCommandWithTimeoutMock.mockImplementation(async (argv, options) => {
+      if (
+        isManagedNpmInstallCommand(argv) &&
+        options?.cwd === npmProjectRoot &&
+        managedNpmRootHasDependency(npmProjectRoot, "drift-plugin")
+      ) {
+        managedInstallAttempts += 1;
+      }
+      return await delegate(argv, options);
+    });
 
     const result = await installPluginFromNpmSpec({
       spec: "drift-plugin@latest",
@@ -1230,11 +1260,19 @@ describe("installPluginFromNpmSpec", () => {
     }
     expect(result.error).toContain("integrity sha512-evil");
     expect(result.error).toContain("expected sha512-safe");
+    expect(managedInstallAttempts).toBe(1);
+    expect(fs.existsSync(path.join(npmProjectRoot, "_openclaw-quarantined-npm-projects"))).toBe(
+      false,
+    );
     expect(fs.existsSync(resolveTestPluginPackageDir(npmRoot, "drift-plugin"))).toBe(false);
   });
 
   it("rejects npm installs when the installed version drifts from verified metadata", async () => {
     const npmRoot = path.join(suiteTempRootTracker.makeTempDir(), "npm");
+    const npmProjectRoot = resolvePluginNpmProjectDir({
+      npmDir: npmRoot,
+      packageName: "version-drift-plugin",
+    });
     mockNpmViewAndInstall({
       spec: "version-drift-plugin@latest",
       packageName: "version-drift-plugin",
@@ -1244,6 +1282,17 @@ describe("installPluginFromNpmSpec", () => {
       npmRoot,
       expectedDependencySpec: "1.0.0",
     });
+    const delegate = runCommandWithTimeoutMock.getMockImplementation();
+    if (!delegate) {
+      throw new Error("expected npm mock implementation");
+    }
+    let managedInstallAttempts = 0;
+    runCommandWithTimeoutMock.mockImplementation(async (argv, options) => {
+      if (isManagedNpmInstallCommand(argv) && options?.cwd === npmProjectRoot) {
+        managedInstallAttempts += 1;
+      }
+      return await delegate(argv, options);
+    });
 
     const result = await installPluginFromNpmSpec({
       spec: "version-drift-plugin@latest",
@@ -1257,11 +1306,236 @@ describe("installPluginFromNpmSpec", () => {
     }
     expect(result.error).toContain("version 1.0.1");
     expect(result.error).toContain("expected 1.0.0");
+    expect(managedInstallAttempts).toBe(1);
+    expect(fs.existsSync(path.join(npmProjectRoot, "_openclaw-quarantined-npm-projects"))).toBe(
+      false,
+    );
     expect(fs.existsSync(resolveTestPluginPackageDir(npmRoot, "version-drift-plugin"))).toBe(false);
   });
 
-  it("rejects npm installs when package-lock omits the installed plugin", async () => {
+  it("quarantines incomplete integrity metadata and rebuilds the managed project once", async () => {
     const npmRoot = path.join(suiteTempRootTracker.makeTempDir(), "npm");
+    const packageName = "missing-integrity-plugin";
+    const npmProjectRoot = resolvePluginNpmProjectDir({ npmDir: npmRoot, packageName });
+    const fixture: MockNpmPackage & { spec: string } = {
+      spec: `${packageName}@latest`,
+      packageName,
+      version: "1.0.0",
+      pluginId: packageName,
+      integrity: "sha512-safe",
+      omitInstalledIntegrity: true,
+      npmRoot,
+      expectedDependencySpec: "1.0.0",
+    };
+    mockNpmViewAndInstall(fixture);
+    const delegate = runCommandWithTimeoutMock.getMockImplementation();
+    if (!delegate) {
+      throw new Error("expected npm mock implementation");
+    }
+    const warnings: string[] = [];
+    let managedInstallAttempts = 0;
+    runCommandWithTimeoutMock.mockImplementation(async (argv, options) => {
+      if (
+        isManagedNpmInstallCommand(argv) &&
+        options?.cwd === npmProjectRoot &&
+        managedNpmRootHasDependency(npmProjectRoot, packageName)
+      ) {
+        managedInstallAttempts += 1;
+        if (managedInstallAttempts === 2) {
+          fixture.omitInstalledIntegrity = false;
+        }
+      }
+      return await delegate(argv, options);
+    });
+
+    const result = await installPluginFromNpmSpec({
+      spec: fixture.spec,
+      expectedIntegrity: fixture.integrity,
+      npmDir: npmRoot,
+      logger: { info: () => {}, warn: (message) => warnings.push(message) },
+    });
+
+    expect(result.ok).toBe(true);
+    expect(managedInstallAttempts).toBe(2);
+    expect(warnings.some((warning) => warning.includes("integrity missing"))).toBe(true);
+    const installed = JSON.parse(
+      fs.readFileSync(path.join(npmProjectRoot, "package-lock.json"), "utf8"),
+    ) as { packages?: Record<string, { integrity?: string }> };
+    expect(installed.packages?.[`node_modules/${packageName}`]?.integrity).toBe("sha512-safe");
+    expect(
+      fs.readdirSync(path.join(npmProjectRoot, "_openclaw-quarantined-npm-projects")),
+    ).toHaveLength(1);
+  });
+
+  it.each(["integrity", "version"] as const)(
+    "fails closed when rebuilt package-lock metadata still omits %s",
+    async (missingField) => {
+      const npmRoot = path.join(suiteTempRootTracker.makeTempDir(), "npm");
+      const packageName = "persistently-incomplete-metadata-plugin";
+      const npmProjectRoot = resolvePluginNpmProjectDir({ npmDir: npmRoot, packageName });
+      mockNpmViewAndInstall({
+        spec: `${packageName}@latest`,
+        packageName,
+        version: "1.0.0",
+        pluginId: packageName,
+        integrity: "sha512-safe",
+        omitInstalledIntegrity: missingField === "integrity",
+        omitInstalledVersion: missingField === "version",
+        npmRoot,
+        expectedDependencySpec: "1.0.0",
+      });
+      const delegate = runCommandWithTimeoutMock.getMockImplementation();
+      if (!delegate) {
+        throw new Error("expected npm mock implementation");
+      }
+      let managedInstallAttempts = 0;
+      runCommandWithTimeoutMock.mockImplementation(async (argv, options) => {
+        if (
+          isManagedNpmInstallCommand(argv) &&
+          options?.cwd === npmProjectRoot &&
+          managedNpmRootHasDependency(npmProjectRoot, packageName)
+        ) {
+          managedInstallAttempts += 1;
+        }
+        return await delegate(argv, options);
+      });
+
+      const result = await installPluginFromNpmSpec({
+        spec: `${packageName}@latest`,
+        expectedIntegrity: "sha512-safe",
+        npmDir: npmRoot,
+        logger: { info: () => {}, warn: () => {} },
+      });
+
+      expect(result.ok).toBe(false);
+      if (result.ok) {
+        return;
+      }
+      expect(managedInstallAttempts).toBe(2);
+      expect(result.error).toContain(
+        "metadata remained incomplete after managed npm project recovery",
+      );
+      expect(result.error).toContain(`${missingField} missing`);
+      expect(
+        fs.readdirSync(path.join(npmProjectRoot, "_openclaw-quarantined-npm-projects")),
+      ).toHaveLength(1);
+      expect(fs.existsSync(resolveTestPluginPackageDir(npmRoot, packageName))).toBe(false);
+    },
+  );
+
+  it("does not restore a quarantined tree when post-recovery validation fails", async () => {
+    const npmRoot = path.join(suiteTempRootTracker.makeTempDir(), "npm");
+    const packageName = "unsafe-recovered-plugin";
+    const addedPeerName = "recovery-added-peer";
+    const npmProjectRoot = resolvePluginNpmProjectDir({ npmDir: npmRoot, packageName });
+    const stalePackageDir = path.join(npmProjectRoot, "node_modules", "stale-plugin");
+    fs.mkdirSync(stalePackageDir, { recursive: true });
+    fs.writeFileSync(path.join(stalePackageDir, "stale.txt"), "poisoned tree", "utf8");
+    const fixture: MockNpmPackage & { spec: string } = {
+      spec: `${packageName}@latest`,
+      packageName,
+      version: "1.0.0",
+      pluginId: packageName,
+      integrity: "sha512-safe",
+      omitInstalledIntegrity: true,
+      npmRoot,
+      expectedDependencySpec: "1.0.0",
+      hoistedDependency: { name: "plain-crypto-js", version: "1.0.0" },
+    };
+    mockNpmViewAndInstallMany([
+      fixture,
+      {
+        packageName: addedPeerName,
+        version: "2.0.0",
+        npmRoot,
+      },
+    ]);
+    const delegate = runCommandWithTimeoutMock.getMockImplementation();
+    if (!delegate) {
+      throw new Error("expected npm mock implementation");
+    }
+    let managedInstallAttempts = 0;
+    runCommandWithTimeoutMock.mockImplementation(async (argv, options) => {
+      if (
+        isManagedNpmInstallCommand(argv) &&
+        options?.cwd === npmProjectRoot &&
+        managedNpmRootHasDependency(npmProjectRoot, packageName)
+      ) {
+        managedInstallAttempts += 1;
+        if (managedInstallAttempts === 2) {
+          fixture.omitInstalledIntegrity = false;
+        }
+      }
+      return await delegate(argv, options);
+    });
+    let mutatedPeerAfterQuarantine = false;
+    const addPeerAfterQuarantine = () => {
+      const manifestPath = path.join(npmProjectRoot, "package.json");
+      const manifest = JSON.parse(fs.readFileSync(manifestPath, "utf8")) as {
+        dependencies?: Record<string, string>;
+        openclaw?: { managedPeerDependencies?: string[] };
+      };
+      manifest.dependencies ??= {};
+      manifest.dependencies[addedPeerName] = "2.0.0";
+      manifest.openclaw ??= {};
+      manifest.openclaw.managedPeerDependencies = [addedPeerName];
+      fs.writeFileSync(manifestPath, `${JSON.stringify(manifest, null, 2)}\n`, "utf8");
+      mutatedPeerAfterQuarantine = true;
+    };
+
+    const result = await installPluginFromNpmSpec({
+      spec: fixture.spec,
+      expectedIntegrity: fixture.integrity,
+      npmDir: npmRoot,
+      logger: {
+        info: () => {},
+        warn: (message) => {
+          if (message.includes("quarantined")) {
+            addPeerAfterQuarantine();
+          }
+        },
+      },
+    });
+
+    expect(result.ok).toBe(false);
+    if (result.ok) {
+      return;
+    }
+    expect(result.code).toBe(PLUGIN_INSTALL_ERROR_CODE.SECURITY_SCAN_BLOCKED);
+    expect(managedInstallAttempts).toBe(2);
+    expect(mutatedPeerAfterQuarantine).toBe(true);
+    const quarantineParent = path.join(npmProjectRoot, "_openclaw-quarantined-npm-projects");
+    const quarantines = fs.readdirSync(quarantineParent);
+    expect(quarantines).toHaveLength(1);
+    expect(
+      fs.readFileSync(
+        path.join(
+          quarantineParent,
+          quarantines[0] ?? "",
+          "node_modules",
+          "stale-plugin",
+          "stale.txt",
+        ),
+        "utf8",
+      ),
+    ).toBe("poisoned tree");
+    expect(fs.existsSync(stalePackageDir)).toBe(false);
+    const manifest = JSON.parse(
+      fs.readFileSync(path.join(npmProjectRoot, "package.json"), "utf8"),
+    ) as {
+      dependencies?: Record<string, string>;
+      openclaw?: { managedPeerDependencies?: string[] };
+    };
+    expect(manifest.dependencies?.[addedPeerName]).toBeUndefined();
+    expect(manifest.openclaw?.managedPeerDependencies ?? []).not.toContain(addedPeerName);
+  });
+
+  it("quarantines and retries once when package-lock omits the installed plugin", async () => {
+    const npmRoot = path.join(suiteTempRootTracker.makeTempDir(), "npm");
+    const npmProjectRoot = resolvePluginNpmProjectDir({
+      npmDir: npmRoot,
+      packageName: "missing-lock-plugin",
+    });
     mockNpmViewAndInstall({
       spec: "missing-lock-plugin@latest",
       packageName: "missing-lock-plugin",
@@ -1271,6 +1545,21 @@ describe("installPluginFromNpmSpec", () => {
       expectedDependencySpec: "1.0.0",
       skipLockfileEntry: true,
     });
+    const delegate = runCommandWithTimeoutMock.getMockImplementation();
+    if (!delegate) {
+      throw new Error("expected npm mock implementation");
+    }
+    let managedInstallAttempts = 0;
+    runCommandWithTimeoutMock.mockImplementation(async (argv, options) => {
+      if (
+        isManagedNpmInstallCommand(argv) &&
+        options?.cwd === npmProjectRoot &&
+        managedNpmRootHasDependency(npmProjectRoot, "missing-lock-plugin")
+      ) {
+        managedInstallAttempts += 1;
+      }
+      return await delegate(argv, options);
+    });
 
     const result = await installPluginFromNpmSpec({
       spec: "missing-lock-plugin@latest",
@@ -1285,6 +1574,10 @@ describe("installPluginFromNpmSpec", () => {
     expect(result.error).toContain(
       "npm install did not record package-lock metadata for missing-lock-plugin",
     );
+    expect(managedInstallAttempts).toBe(2);
+    expect(
+      fs.readdirSync(path.join(npmProjectRoot, "_openclaw-quarantined-npm-projects")),
+    ).toHaveLength(1);
     expect(fs.existsSync(resolveTestPluginPackageDir(npmRoot, "missing-lock-plugin"))).toBe(false);
   });
 
diff --git a/src/plugins/install.ts b/src/plugins/install.ts
index fbc00342d11e..63b371d2067f 100644
--- a/src/plugins/install.ts
+++ b/src/plugins/install.ts
@@ -51,6 +51,7 @@ import { runCommandWithTimeout } from "../process/exec.js";
 import type { InstallPolicySource } from "../security/install-policy.js";
 import { createLazyImportLoader } from "../shared/lazy-promise.js";
 import { resolveUserPath } from "../utils.js";
+import { verifyInstalledNpmResolution } from "./install-npm-resolution.js";
 import {
   encodePluginInstallDirName,
   matchesExpectedPluginId,
@@ -1038,23 +1039,6 @@ async function quarantineManagedNpmProjectRebuildArtifacts(params: {
   return { quarantineDir, movedArtifactNames };
 }
 
-function resolveInstalledNpmResolutionMismatch(params: {
-  packageName: string;
-  expected: NpmSpecResolution;
-  installed: ManagedNpmRootInstalledDependency | null;
-}): string | null {
-  if (!params.installed) {
-    return `npm install did not record package-lock metadata for ${params.packageName}`;
-  }
-  if (params.expected.version && params.installed.version !== params.expected.version) {
-    return `npm install resolved ${params.packageName} to version ${params.installed.version ?? "unknown"}, expected ${params.expected.version}`;
-  }
-  if (params.expected.integrity && params.installed.integrity !== params.expected.integrity) {
-    return `npm install resolved ${params.packageName} with integrity ${params.installed.integrity ?? "unknown"}, expected ${params.expected.integrity}`;
-  }
-  return null;
-}
-
 async function listManagedNpmRootPackageNames(npmRoot: string): Promise<Set<string>> {
   const nodeModulesDir = path.join(npmRoot, "node_modules");
   let entries: Dirent[];
@@ -1417,6 +1401,15 @@ async function installPluginFromManagedNpmRoot(
 
   let rollbackSnapshot: ManagedNpmPluginInstallRollbackSnapshot;
   let preparedDependency: ManagedNpmRootPreparedDependency | undefined;
+  let rollbackPeerDependencySnapshot:
+    | Awaited<ReturnType<typeof readManagedNpmRootPeerDependencySnapshot>>
+    | undefined;
+  let recovery:
+    | {
+        cause: { kind: "npm-corruption" | "incomplete-metadata"; error: string };
+        quarantine: ManagedNpmProjectQuarantine;
+      }
+    | undefined;
   try {
     rollbackSnapshot = await createManagedNpmPluginInstallRollbackSnapshot({ npmRoot });
   } catch (error) {
@@ -1440,11 +1433,8 @@ async function installPluginFromManagedNpmRoot(
         logger.info?.(`Repaired stale openclaw peer dependency in ${npmRoot}`);
       }
     }
-    let preInstallRootPackageNames = await listManagedNpmRootPackageNames(npmRoot);
     const managedOverrides = await readOpenClawManagedNpmRootOverrides();
-    const rollbackPeerDependencySnapshot = await readManagedNpmRootPeerDependencySnapshot({
-      npmRoot,
-    });
+    rollbackPeerDependencySnapshot ??= await readManagedNpmRootPeerDependencySnapshot({ npmRoot });
     const rollbackFailedManagedNpmInstall = async (
       failure: Extract<InstallPluginResult, { ok: false }>,
     ): Promise<Extract<InstallPluginResult, { ok: false }>> => {
@@ -1455,7 +1445,9 @@ async function installPluginFromManagedNpmRoot(
         timeoutMs,
         logger,
         peerDependencySnapshot: rollbackPeerDependencySnapshot,
-        snapshot: rollbackSnapshot,
+        // Once the poisoned tree has been quarantined, restoring this snapshot
+        // would recreate the crash loop that the recovery attempt is repairing.
+        snapshot: recovery ? undefined : rollbackSnapshot,
       });
       await rollbackManagedNpmRootPreparedDependency({
         packageName: params.packageName,
@@ -1464,23 +1456,22 @@ async function installPluginFromManagedNpmRoot(
       });
       return failure;
     };
-    const rollbackFailedManagedNpmInstallAfterQuarantine = async (
-      failure: Extract<InstallPluginResult, { ok: false }>,
-    ): Promise<Extract<InstallPluginResult, { ok: false }>> => {
-      await rollbackManagedNpmPluginInstall({
-        npmRoot,
-        packageName: params.packageName,
-        targetDir: installRoot,
-        timeoutMs,
-        logger,
-        peerDependencySnapshot: rollbackPeerDependencySnapshot,
-      });
-      await rollbackManagedNpmRootPreparedDependency({
-        packageName: params.packageName,
-        preparedDependency: prepared,
-        logger,
-      });
-      return failure;
+    const quarantineForRecovery = async (
+      cause: NonNullable<typeof recovery>["cause"],
+    ): Promise<Extract<InstallPluginResult, { ok: false }> | null> => {
+      try {
+        const quarantine = await quarantineManagedNpmProjectRebuildArtifacts({ npmRoot });
+        recovery = { cause, quarantine };
+      } catch (error) {
+        return await rollbackFailedManagedNpmInstall({
+          ok: false,
+          error: `${cause.error}, but OpenClaw could not quarantine ${npmRoot} for rebuild: ${String(error)}`,
+        });
+      }
+      logger.warn?.(
+        `${cause.error}; quarantined ${formatManagedNpmProjectQuarantineArtifacts(recovery.quarantine.movedArtifactNames)} at ${recovery.quarantine.quarantineDir} and rebuilding once before retrying.`,
+      );
+      return null;
     };
     const syncManagedPeerDependenciesForInstall = async (options?: {
       omitUnsupportedManagedOverrides?: boolean;
@@ -1502,13 +1493,18 @@ async function installPluginFromManagedNpmRoot(
         };
       }
     };
+    let omitUnsupportedManagedOverrides = false;
+    const preInstallRootPackageNames = await listManagedNpmRootPackageNames(npmRoot);
     await upsertManagedNpmRootDependency({
       npmRoot,
       packageName: params.packageName,
       dependencySpec: prepared.dependencySpec,
       managedOverrides,
+      omitUnsupportedManagedOverrides,
+    });
+    const initialPeerSync = await syncManagedPeerDependenciesForInstall({
+      omitUnsupportedManagedOverrides,
     });
-    const initialPeerSync = await syncManagedPeerDependenciesForInstall();
     if (!initialPeerSync.ok) {
       return await rollbackFailedManagedNpmInstall({ ok: false, error: initialPeerSync.error });
     }
@@ -1534,7 +1530,6 @@ async function installPluginFromManagedNpmRoot(
       }),
     };
     let install = await runCommandWithTimeout(npmInstallArgs, npmInstallOptions);
-    let omitUnsupportedManagedOverrides = false;
     if (install.code !== 0 && isNpmAliasOverrideComparatorError(install)) {
       logger.warn?.(
         "npm rejected managed npm alias overrides; retrying plugin install without alias overrides for this npm version.",
@@ -1558,42 +1553,24 @@ async function installPluginFromManagedNpmRoot(
       }
       install = await runCommandWithTimeout(npmInstallArgs, npmInstallOptions);
     }
-    if (install.code !== 0 && isManagedNpmProjectCorruptionInstallFailure(install)) {
+    if (!recovery && install.code !== 0 && isManagedNpmProjectCorruptionInstallFailure(install)) {
       const originalError = formatNpmCommandFailureOutput(install);
-      let quarantine: ManagedNpmProjectQuarantine;
-      try {
-        quarantine = await quarantineManagedNpmProjectRebuildArtifacts({ npmRoot });
-      } catch (error) {
-        return await rollbackFailedManagedNpmInstall({
-          ok: false,
-          error: `npm install failed with a managed npm project corruption signature, but OpenClaw could not quarantine ${npmRoot} for rebuild: ${String(error)}. Original npm error: ${originalError}`,
-        });
-      }
-      logger.warn?.(
-        `npm reported a managed npm project corruption signature; quarantined ${formatManagedNpmProjectQuarantineArtifacts(quarantine.movedArtifactNames)} at ${quarantine.quarantineDir} and rebuilding once before retrying.`,
-      );
-      preInstallRootPackageNames = await listManagedNpmRootPackageNames(npmRoot);
-      const recoveryPeerSync = await syncManagedPeerDependenciesForInstall({
-        omitUnsupportedManagedOverrides,
+      const recoveryFailure = await quarantineForRecovery({
+        kind: "npm-corruption",
+        error: `npm install failed with a managed npm project corruption signature. Original npm error: ${originalError}`,
       });
-      if (!recoveryPeerSync.ok) {
-        return await rollbackFailedManagedNpmInstallAfterQuarantine({
-          ok: false,
-          error: `managed npm project recovery failed after quarantining ${formatManagedNpmProjectQuarantineArtifacts(quarantine.movedArtifactNames)} at ${quarantine.quarantineDir}: ${recoveryPeerSync.error}. Original npm error: ${originalError}`,
-        });
-      }
-      install = await runCommandWithTimeout(npmInstallArgs, npmInstallOptions);
-      if (install.code !== 0) {
-        return await rollbackFailedManagedNpmInstallAfterQuarantine({
-          ok: false,
-          error: `npm install failed after managed npm project recovery (quarantine: ${quarantine.quarantineDir}): ${formatNpmCommandFailureOutput(install)}. Original npm error: ${originalError}`,
-        });
+      if (recoveryFailure) {
+        return recoveryFailure;
       }
+      return await runManagedNpmInstall(prepared);
     }
     if (install.code !== 0) {
+      const error = recovery
+        ? `npm install failed after managed npm project recovery (quarantine: ${recovery.quarantine.quarantineDir}): ${formatNpmCommandFailureOutput(install)}. Original ${recovery.cause.kind === "npm-corruption" ? "npm" : "verification"} error: ${recovery.cause.error}`
+        : `npm install failed: ${formatNpmCommandFailureOutput(install)}`;
       return await rollbackFailedManagedNpmInstall({
         ok: false,
-        error: `npm install failed: ${formatNpmCommandFailureOutput(install)}`,
+        error,
       });
     }
     let settledManagedPeerDependencies = false;
@@ -1760,15 +1737,31 @@ async function installPluginFromManagedNpmRoot(
         error: `Failed to verify npm install metadata for ${params.packageName}: ${String(error)}`,
       });
     }
-    const resolutionMismatch = resolveInstalledNpmResolutionMismatch({
+    const resolutionVerification = verifyInstalledNpmResolution({
       packageName: params.packageName,
       expected: params.npmResolution,
       installed: installedDependency,
     });
-    if (resolutionMismatch) {
+    if (resolutionVerification.kind === "conflict") {
       return await rollbackFailedManagedNpmInstall({
         ok: false,
-        error: resolutionMismatch,
+        error: resolutionVerification.error,
+      });
+    }
+    if (resolutionVerification.kind === "incomplete") {
+      if (!recovery) {
+        const recoveryFailure = await quarantineForRecovery({
+          kind: "incomplete-metadata",
+          error: resolutionVerification.error,
+        });
+        if (recoveryFailure) {
+          return recoveryFailure;
+        }
+        return await runManagedNpmInstall(prepared);
+      }
+      return await rollbackFailedManagedNpmInstall({
+        ok: false,
+        error: `npm install metadata remained incomplete after managed npm project recovery (quarantine: ${recovery.quarantine.quarantineDir}): ${resolutionVerification.error}`,
       });
     }