diff --git a/extensions/acpx/src/codex-auth-bridge.ts b/extensions/acpx/src/codex-auth-bridge.ts
index 2b98ea46369..9b322fa3466 100644
--- a/extensions/acpx/src/codex-auth-bridge.ts
+++ b/extensions/acpx/src/codex-auth-bridge.ts
@@ -2,6 +2,7 @@ import fsSync from "node:fs";
 import fs from "node:fs/promises";
 import { createRequire } from "node:module";
 import path from "node:path";
+import { readJsonFileWithFallback } from "openclaw/plugin-sdk/json-store";
 import { resolveAcpxPluginRoot } from "./config.js";
 import type { ResolvedAcpxPluginConfig } from "./config.js";
 
@@ -113,7 +114,10 @@ async function resolveInstalledAcpPackageBinPath(
 ): Promise<string | undefined> {
   try {
     const packageJsonPath = requireFromHere.resolve(`${packageName}/package.json`);
-    const manifest = JSON.parse(await fs.readFile(packageJsonPath, "utf8")) as PackageManifest;
+    const { value: manifest } = await readJsonFileWithFallback<PackageManifest>(
+      packageJsonPath,
+      {},
+    );
     if (manifest.name !== packageName) {
       return undefined;
     }
diff --git a/extensions/browser/src/browser/chrome.profile-decoration.ts b/extensions/browser/src/browser/chrome.profile-decoration.ts
index ebacb7580c3..9256edda928 100644
--- a/extensions/browser/src/browser/chrome.profile-decoration.ts
+++ b/extensions/browser/src/browser/chrome.profile-decoration.ts
@@ -1,5 +1,6 @@
 import fs from "node:fs";
 import path from "node:path";
+import { loadJsonFile, saveJsonFile } from "openclaw/plugin-sdk/json-store";
 import {
   DEFAULT_OPENCLAW_BROWSER_COLOR,
   DEFAULT_OPENCLAW_BROWSER_PROFILE_NAME,
@@ -10,24 +11,14 @@ function decoratedMarkerPath(userDataDir: string) {
 }
 
 function safeReadJson(filePath: string): Record<string, unknown> | null {
-  try {
-    if (!fs.existsSync(filePath)) {
-      return null;
-    }
-    const raw = fs.readFileSync(filePath, "utf-8");
-    const parsed = JSON.parse(raw) as unknown;
-    if (typeof parsed !== "object" || parsed === null || Array.isArray(parsed)) {
-      return null;
-    }
-    return parsed as Record<string, unknown>;
-  } catch {
-    return null;
-  }
+  const parsed = loadJsonFile(filePath);
+  return typeof parsed === "object" && parsed !== null && !Array.isArray(parsed)
+    ? (parsed as Record<string, unknown>)
+    : null;
 }
 
 function safeWriteJson(filePath: string, data: Record<string, unknown>) {
-  fs.mkdirSync(path.dirname(filePath), { recursive: true });
-  fs.writeFileSync(filePath, JSON.stringify(data, null, 2));
+  saveJsonFile(filePath, data);
 }
 
 function asRecord(value: unknown): Record<string, unknown> | null {
diff --git a/extensions/codex/src/migration/helpers.ts b/extensions/codex/src/migration/helpers.ts
index 0a91b2bca5f..459040f7843 100644
--- a/extensions/codex/src/migration/helpers.ts
+++ b/extensions/codex/src/migration/helpers.ts
@@ -1,6 +1,7 @@
 import fs from "node:fs/promises";
 import os from "node:os";
 import path from "node:path";
+import { readJsonFileWithFallback } from "openclaw/plugin-sdk/json-store";
 import { pathExists } from "openclaw/plugin-sdk/security-runtime";
 
 export async function exists(filePath: string): Promise<boolean> {
@@ -47,10 +48,8 @@ export async function readJsonObject(
   if (!filePath) {
     return {};
   }
-  try {
-    const parsed = JSON.parse(await fs.readFile(filePath, "utf8"));
-    return parsed && typeof parsed === "object" && !Array.isArray(parsed) ? parsed : {};
-  } catch {
-    return {};
-  }
+  const { value: parsed } = await readJsonFileWithFallback<unknown>(filePath, {});
+  return parsed && typeof parsed === "object" && !Array.isArray(parsed)
+    ? (parsed as Record<string, unknown>)
+    : {};
 }
diff --git a/extensions/diffs/src/pierre-themes.ts b/extensions/diffs/src/pierre-themes.ts
index d5d531a55db..ba6dc5c790a 100644
--- a/extensions/diffs/src/pierre-themes.ts
+++ b/extensions/diffs/src/pierre-themes.ts
@@ -1,7 +1,7 @@
-import fs from "node:fs/promises";
 import { createRequire } from "node:module";
 import type { ThemeRegistrationResolved } from "@pierre/diffs";
 import { RegisteredCustomThemes, ResolvedThemes, ResolvingThemes } from "@pierre/diffs";
+import { readJsonFileWithFallback } from "openclaw/plugin-sdk/json-store";
 
 type PierreThemeName = "pierre-dark" | "pierre-light";
 const themeRequire = createRequire(import.meta.url);
@@ -20,8 +20,9 @@ function createThemeLoader(
       return cachedTheme;
     }
     const themePath = themeRequire.resolve(themeSpecifier);
+    const { value: theme } = await readJsonFileWithFallback<Record<string, unknown>>(themePath, {});
     cachedTheme = {
-      ...(JSON.parse(await fs.readFile(themePath, "utf8")) as Record<string, unknown>),
+      ...theme,
       name: themeName,
     } as ThemeRegistrationResolved;
     return cachedTheme;
diff --git a/extensions/diffs/src/store.ts b/extensions/diffs/src/store.ts
index ac38e2d42d8..b7d7dfb872b 100644
--- a/extensions/diffs/src/store.ts
+++ b/extensions/diffs/src/store.ts
@@ -174,13 +174,13 @@ export class DiffArtifactStore {
   }
 
   async cleanupExpired(): Promise<void> {
-    await this.ensureRoot();
-    const entries = await fs.readdir(this.rootDir, { withFileTypes: true }).catch(() => []);
+    const root = await this.artifactRoot();
+    const entries = await root.list("", { withFileTypes: true }).catch(() => []);
     const now = Date.now();
 
     await Promise.all(
       entries
-        .filter((entry) => entry.isDirectory())
+        .filter((entry) => entry.isDirectory)
         .map(async (entry) => {
           const id = entry.name;
           const meta = await this.readMeta(id);
@@ -199,12 +199,7 @@ export class DiffArtifactStore {
             return;
           }
 
-          const artifactPath = this.artifactDir(id);
-          const stat = await fs.stat(artifactPath).catch(() => null);
-          if (!stat) {
-            return;
-          }
-          if (now - stat.mtimeMs > SWEEP_FALLBACK_AGE_MS) {
+          if (now - entry.mtimeMs > SWEEP_FALLBACK_AGE_MS) {
             await this.deleteArtifact(id);
           }
         }),
diff --git a/extensions/matrix/src/legacy-crypto.ts b/extensions/matrix/src/legacy-crypto.ts
index a34972c16ef..931a38334a9 100644
--- a/extensions/matrix/src/legacy-crypto.ts
+++ b/extensions/matrix/src/legacy-crypto.ts
@@ -2,7 +2,10 @@ import fs from "node:fs";
 import os from "node:os";
 import path from "node:path";
 import type { OpenClawConfig } from "openclaw/plugin-sdk/config-types";
-import { writeJsonFileAtomically as writeJsonFileAtomicallyImpl } from "openclaw/plugin-sdk/json-store";
+import {
+  loadJsonFile,
+  writeJsonFileAtomically as writeJsonFileAtomicallyImpl,
+} from "openclaw/plugin-sdk/json-store";
 import { resolveStateDir } from "openclaw/plugin-sdk/state-paths";
 import { resolveConfiguredMatrixAccountIds } from "./account-selection.js";
 import { isMatrixLegacyCryptoInspectorAvailable } from "./legacy-crypto-inspector-availability.js";
@@ -208,20 +211,13 @@ function resolveLegacyMatrixFlatStorePlan(params: {
 function loadLegacyBotSdkMetadata(cryptoRootDir: string): MatrixLegacyBotSdkMetadata {
   const metadataPath = path.join(cryptoRootDir, "bot-sdk.json");
   const fallback: MatrixLegacyBotSdkMetadata = { deviceId: null };
-  try {
-    if (!fs.existsSync(metadataPath)) {
-      return fallback;
-    }
-    const parsed = JSON.parse(fs.readFileSync(metadataPath, "utf8")) as {
-      deviceId?: unknown;
-    };
-    return {
-      deviceId:
-        typeof parsed.deviceId === "string" && parsed.deviceId.trim() ? parsed.deviceId : null,
-    };
-  } catch {
-    return fallback;
-  }
+  const parsed = loadJsonFile<{ deviceId?: unknown }>(metadataPath);
+  return {
+    deviceId:
+      typeof parsed?.deviceId === "string" && parsed.deviceId.trim()
+        ? parsed.deviceId
+        : fallback.deviceId,
+  };
 }
 
 function resolveMatrixLegacyCryptoPlans(params: {
@@ -288,25 +284,11 @@ function resolveMatrixLegacyCryptoPlans(params: {
 }
 
 function loadStoredRecoveryKey(filePath: string): MatrixStoredRecoveryKey | null {
-  try {
-    if (!fs.existsSync(filePath)) {
-      return null;
-    }
-    return JSON.parse(fs.readFileSync(filePath, "utf8")) as MatrixStoredRecoveryKey;
-  } catch {
-    return null;
-  }
+  return loadJsonFile<MatrixStoredRecoveryKey>(filePath) ?? null;
 }
 
 function loadLegacyCryptoMigrationState(filePath: string): MatrixLegacyCryptoMigrationState | null {
-  try {
-    if (!fs.existsSync(filePath)) {
-      return null;
-    }
-    return JSON.parse(fs.readFileSync(filePath, "utf8")) as MatrixLegacyCryptoMigrationState;
-  } catch {
-    return null;
-  }
+  return loadJsonFile<MatrixLegacyCryptoMigrationState>(filePath) ?? null;
 }
 
 async function persistLegacyMigrationState(params: {
diff --git a/extensions/matrix/src/matrix/client/storage.ts b/extensions/matrix/src/matrix/client/storage.ts
index f3ed0bd6046..35a7dd3d739 100644
--- a/extensions/matrix/src/matrix/client/storage.ts
+++ b/extensions/matrix/src/matrix/client/storage.ts
@@ -3,6 +3,7 @@ import os from "node:os";
 import path from "node:path";
 import { normalizeAccountId } from "openclaw/plugin-sdk/account-id";
 import type { OpenClawConfig } from "openclaw/plugin-sdk/config-types";
+import { loadJsonFile, saveJsonFile } from "openclaw/plugin-sdk/json-store";
 import {
   requiresExplicitMatrixDefaultAccount,
   resolveMatrixDefaultOrOnlyAccountId,
@@ -105,10 +106,10 @@ function resolveStorageRootMtimeMs(rootDir: string): number {
 function readStoredRootMetadata(rootDir: string): StoredRootMetadata {
   const metadata: StoredRootMetadata = {};
 
-  try {
-    const parsed = JSON.parse(
-      fs.readFileSync(path.join(rootDir, STORAGE_META_FILENAME), "utf8"),
-    ) as Partial<StoredRootMetadata>;
+  const parsed = loadJsonFile<Partial<StoredRootMetadata>>(
+    path.join(rootDir, STORAGE_META_FILENAME),
+  );
+  if (parsed) {
     if (typeof parsed.homeserver === "string" && parsed.homeserver.trim()) {
       metadata.homeserver = parsed.homeserver.trim();
     }
@@ -130,19 +131,17 @@ function readStoredRootMetadata(rootDir: string): StoredRootMetadata {
     if (typeof parsed.createdAt === "string" && parsed.createdAt.trim()) {
       metadata.createdAt = parsed.createdAt.trim();
     }
-  } catch {
-    // ignore missing or malformed storage metadata
   }
 
-  try {
-    const parsed = JSON.parse(
-      fs.readFileSync(path.join(rootDir, STARTUP_VERIFICATION_FILENAME), "utf8"),
-    ) as { deviceId?: unknown };
-    if (!metadata.deviceId && typeof parsed.deviceId === "string" && parsed.deviceId.trim()) {
-      metadata.deviceId = parsed.deviceId.trim();
-    }
-  } catch {
-    // ignore missing or malformed verification state
+  const verification = loadJsonFile<{ deviceId?: unknown }>(
+    path.join(rootDir, STARTUP_VERIFICATION_FILENAME),
+  );
+  if (
+    !metadata.deviceId &&
+    typeof verification?.deviceId === "string" &&
+    verification.deviceId.trim()
+  ) {
+    metadata.deviceId = verification.deviceId.trim();
   }
 
   return metadata;
@@ -473,8 +472,7 @@ function writeStoredRootMetadata(
   },
 ): boolean {
   try {
-    fs.mkdirSync(path.dirname(metaPath), { recursive: true });
-    fs.writeFileSync(metaPath, JSON.stringify(payload, null, 2), "utf-8");
+    saveJsonFile(metaPath, payload);
     return true;
   } catch {
     return false;
diff --git a/extensions/matrix/src/matrix/sdk/recovery-key-store.ts b/extensions/matrix/src/matrix/sdk/recovery-key-store.ts
index a147014df71..1b6d42c267b 100644
--- a/extensions/matrix/src/matrix/sdk/recovery-key-store.ts
+++ b/extensions/matrix/src/matrix/sdk/recovery-key-store.ts
@@ -1,6 +1,5 @@
-import fs from "node:fs";
-import path from "node:path";
 import { decodeRecoveryKey } from "matrix-js-sdk/lib/crypto-api/recovery-key.js";
+import { loadJsonFile, saveJsonFile } from "openclaw/plugin-sdk/json-store";
 import { formatMatrixErrorMessage, formatMatrixErrorReason } from "../errors.js";
 import { LogService } from "./logger.js";
 import type {
@@ -399,13 +398,9 @@ export class MatrixRecoveryKeyStore {
       return null;
     }
     try {
-      if (!fs.existsSync(this.recoveryKeyPath)) {
-        return null;
-      }
-      const raw = fs.readFileSync(this.recoveryKeyPath, "utf8");
-      const parsed = JSON.parse(raw) as Partial<MatrixStoredRecoveryKey>;
+      const parsed = loadJsonFile<Partial<MatrixStoredRecoveryKey>>(this.recoveryKeyPath);
       if (
-        parsed.version !== 1 ||
+        parsed?.version !== 1 ||
         typeof parsed.createdAt !== "string" ||
         typeof parsed.privateKeyBase64 !== "string" || // pragma: allowlist secret
         !parsed.privateKeyBase64.trim()
@@ -450,9 +445,7 @@ export class MatrixRecoveryKeyStore {
             }
           : undefined,
       };
-      fs.mkdirSync(path.dirname(this.recoveryKeyPath), { recursive: true });
-      fs.writeFileSync(this.recoveryKeyPath, JSON.stringify(payload, null, 2), "utf8");
-      fs.chmodSync(this.recoveryKeyPath, 0o600);
+      saveJsonFile(this.recoveryKeyPath, payload);
     } catch (err) {
       LogService.warn("MatrixClientLite", "Failed to persist recovery key:", err);
     }
diff --git a/extensions/memory-core/src/dreaming-phases.ts b/extensions/memory-core/src/dreaming-phases.ts
index 7a9948c00ab..cb7ecadf8e6 100644
--- a/extensions/memory-core/src/dreaming-phases.ts
+++ b/extensions/memory-core/src/dreaming-phases.ts
@@ -396,10 +396,6 @@ type DailyIngestionState = {
   files: Record<string, DailyIngestionFileState>;
 };
 
-function resolveDailyIngestionStatePath(workspaceDir: string): string {
-  return path.join(workspaceDir, DAILY_INGESTION_STATE_RELATIVE_PATH);
-}
-
 function normalizeDailyIngestionState(raw: unknown): DailyIngestionState {
   const record = asRecord(raw);
   const filesRaw = asRecord(record?.files);
@@ -442,10 +438,9 @@ function normalizeMemoryDay(value: unknown): string | undefined {
 }
 
 async function readDailyIngestionState(workspaceDir: string): Promise<DailyIngestionState> {
-  const statePath = resolveDailyIngestionStatePath(workspaceDir);
   try {
     return normalizeDailyIngestionState(
-      await privateFileStore(workspaceDir).readJsonIfExists(path.relative(workspaceDir, statePath)),
+      await privateFileStore(workspaceDir).readJsonIfExists(DAILY_INGESTION_STATE_RELATIVE_PATH),
     );
   } catch (err) {
     if (err instanceof SyntaxError) {
@@ -459,8 +454,7 @@ async function writeDailyIngestionState(
   workspaceDir: string,
   state: DailyIngestionState,
 ): Promise<void> {
-  const statePath = resolveDailyIngestionStatePath(workspaceDir);
-  await privateFileStore(workspaceDir).writeJson(path.relative(workspaceDir, statePath), state, {
+  await privateFileStore(workspaceDir).writeJson(DAILY_INGESTION_STATE_RELATIVE_PATH, state, {
     trailingNewline: true,
   });
 }
@@ -496,10 +490,6 @@ function normalizeWorkspaceKey(workspaceDir: string): string {
   return process.platform === "win32" ? resolved.toLowerCase() : resolved;
 }
 
-function resolveSessionIngestionStatePath(workspaceDir: string): string {
-  return path.join(workspaceDir, SESSION_INGESTION_STATE_RELATIVE_PATH);
-}
-
 function normalizeSessionIngestionState(raw: unknown): SessionIngestionState {
   const record = asRecord(raw);
   const filesRaw = asRecord(record?.files);
@@ -554,10 +544,9 @@ function normalizeSessionIngestionState(raw: unknown): SessionIngestionState {
 }
 
 async function readSessionIngestionState(workspaceDir: string): Promise<SessionIngestionState> {
-  const statePath = resolveSessionIngestionStatePath(workspaceDir);
   try {
     return normalizeSessionIngestionState(
-      await privateFileStore(workspaceDir).readJsonIfExists(path.relative(workspaceDir, statePath)),
+      await privateFileStore(workspaceDir).readJsonIfExists(SESSION_INGESTION_STATE_RELATIVE_PATH),
     );
   } catch (err) {
     if (err instanceof SyntaxError) {
@@ -571,8 +560,7 @@ async function writeSessionIngestionState(
   workspaceDir: string,
   state: SessionIngestionState,
 ): Promise<void> {
-  const statePath = resolveSessionIngestionStatePath(workspaceDir);
-  await privateFileStore(workspaceDir).writeJson(path.relative(workspaceDir, statePath), state, {
+  await privateFileStore(workspaceDir).writeJson(SESSION_INGESTION_STATE_RELATIVE_PATH, state, {
     trailingNewline: true,
   });
 }
diff --git a/extensions/memory-core/src/short-term-promotion.ts b/extensions/memory-core/src/short-term-promotion.ts
index 8dad1901422..fa34ce3ec01 100644
--- a/extensions/memory-core/src/short-term-promotion.ts
+++ b/extensions/memory-core/src/short-term-promotion.ts
@@ -757,10 +757,9 @@ async function withShortTermLock<T>(workspaceDir: string, task: () => Promise<T>
 }
 
 async function readStore(workspaceDir: string, nowIso: string): Promise<ShortTermRecallStore> {
-  const storePath = resolveStorePath(workspaceDir);
   try {
     return normalizeStore(
-      await privateFileStore(workspaceDir).readJsonIfExists(path.relative(workspaceDir, storePath)),
+      await privateFileStore(workspaceDir).readJsonIfExists(SHORT_TERM_STORE_RELATIVE_PATH),
       nowIso,
     );
   } catch (err) {
@@ -830,12 +829,9 @@ async function readPhaseSignalStore(
   workspaceDir: string,
   nowIso: string,
 ): Promise<ShortTermPhaseSignalStore> {
-  const phaseSignalPath = resolvePhaseSignalPath(workspaceDir);
   try {
     return normalizePhaseSignalStore(
-      await privateFileStore(workspaceDir).readJsonIfExists(
-        path.relative(workspaceDir, phaseSignalPath),
-      ),
+      await privateFileStore(workspaceDir).readJsonIfExists(SHORT_TERM_PHASE_SIGNAL_RELATIVE_PATH),
       nowIso,
     );
   } catch {
@@ -847,21 +843,15 @@ async function writePhaseSignalStore(
   workspaceDir: string,
   store: ShortTermPhaseSignalStore,
 ): Promise<void> {
-  const phaseSignalPath = resolvePhaseSignalPath(workspaceDir);
   await ensureShortTermArtifactsDir(workspaceDir);
-  await privateFileStore(workspaceDir).writeJson(
-    path.relative(workspaceDir, phaseSignalPath),
-    store,
-    {
-      trailingNewline: true,
-    },
-  );
+  await privateFileStore(workspaceDir).writeJson(SHORT_TERM_PHASE_SIGNAL_RELATIVE_PATH, store, {
+    trailingNewline: true,
+  });
 }
 
 async function writeStore(workspaceDir: string, store: ShortTermRecallStore): Promise<void> {
-  const storePath = resolveStorePath(workspaceDir);
   await ensureShortTermArtifactsDir(workspaceDir);
-  await privateFileStore(workspaceDir).writeJson(path.relative(workspaceDir, storePath), store, {
+  await privateFileStore(workspaceDir).writeJson(SHORT_TERM_STORE_RELATIVE_PATH, store, {
     trailingNewline: true,
   });
 }
diff --git a/extensions/memory-wiki/src/chatgpt-import.ts b/extensions/memory-wiki/src/chatgpt-import.ts
index 51be10ecd45..339ac219972 100644
--- a/extensions/memory-wiki/src/chatgpt-import.ts
+++ b/extensions/memory-wiki/src/chatgpt-import.ts
@@ -1,6 +1,7 @@
 import { createHash } from "node:crypto";
 import fs from "node:fs/promises";
 import path from "node:path";
+import { writeJsonFileAtomically } from "openclaw/plugin-sdk/json-store";
 import {
   replaceManagedMarkdownBlock,
   withTrailingNewline,
@@ -679,8 +680,7 @@ async function writeImportRunRecord(
   record: ChatGptImportRunRecord,
 ): Promise<void> {
   const recordPath = resolveImportRunPath(vaultRoot, record.runId);
-  await fs.mkdir(path.dirname(recordPath), { recursive: true });
-  await fs.writeFile(recordPath, `${JSON.stringify(record, null, 2)}\n`, "utf8");
+  await writeJsonFileAtomically(recordPath, record);
 }
 
 async function readImportRunRecord(
diff --git a/extensions/memory-wiki/src/source-sync-state.ts b/extensions/memory-wiki/src/source-sync-state.ts
index 6eff093c2bb..db7fe6b2b4e 100644
--- a/extensions/memory-wiki/src/source-sync-state.ts
+++ b/extensions/memory-wiki/src/source-sync-state.ts
@@ -1,5 +1,6 @@
 import fs from "node:fs/promises";
 import path from "node:path";
+import { readJsonFileWithFallback, writeJsonFileAtomically } from "openclaw/plugin-sdk/json-store";
 
 export type MemoryWikiImportedSourceGroup = "bridge" | "unsafe-local";
 
@@ -30,30 +31,14 @@ export async function readMemoryWikiSourceSyncState(
   vaultRoot: string,
 ): Promise<MemoryWikiImportedSourceState> {
   const statePath = resolveMemoryWikiSourceSyncStatePath(vaultRoot);
-  const raw = await fs.readFile(statePath, "utf8").catch((err: unknown) => {
-    if ((err as NodeJS.ErrnoException)?.code === "ENOENT") {
-      return "";
-    }
-    throw err;
-  });
-  if (!raw.trim()) {
-    return {
-      version: EMPTY_STATE.version,
-      entries: {},
-    };
-  }
-  try {
-    const parsed = JSON.parse(raw) as Partial<MemoryWikiImportedSourceState>;
-    return {
-      version: 1,
-      entries: { ...parsed.entries },
-    };
-  } catch {
-    return {
-      version: EMPTY_STATE.version,
-      entries: {},
-    };
-  }
+  const { value: parsed } = await readJsonFileWithFallback<Partial<MemoryWikiImportedSourceState>>(
+    statePath,
+    EMPTY_STATE,
+  );
+  return {
+    version: 1,
+    entries: { ...parsed.entries },
+  };
 }
 
 export async function writeMemoryWikiSourceSyncState(
@@ -61,8 +46,7 @@ export async function writeMemoryWikiSourceSyncState(
   state: MemoryWikiImportedSourceState,
 ): Promise<void> {
   const statePath = resolveMemoryWikiSourceSyncStatePath(vaultRoot);
-  await fs.mkdir(path.dirname(statePath), { recursive: true });
-  await fs.writeFile(statePath, `${JSON.stringify(state, null, 2)}\n`, "utf8");
+  await writeJsonFileAtomically(statePath, state);
 }
 
 export async function shouldSkipImportedSourceWrite(params: {
diff --git a/extensions/msteams/src/feedback-reflection-store.ts b/extensions/msteams/src/feedback-reflection-store.ts
index 192b47f3c4a..f32929947b2 100644
--- a/extensions/msteams/src/feedback-reflection-store.ts
+++ b/extensions/msteams/src/feedback-reflection-store.ts
@@ -1,5 +1,5 @@
 import fs from "node:fs/promises";
-import { replaceFileAtomic } from "openclaw/plugin-sdk/security-runtime";
+import { writeJsonFileAtomically } from "openclaw/plugin-sdk/json-store";
 
 /** Default cooldown between reflections per session (5 minutes). */
 export const DEFAULT_COOLDOWN_MS = 300_000;
@@ -93,11 +93,7 @@ export async function storeSessionLearning(params: {
     learnings = learnings.slice(-10);
   }
 
-  await replaceFileAtomic({
-    filePath: learningsFile,
-    content: JSON.stringify(learnings, null, 2),
-    tempPrefix: ".msteams-learnings",
-  });
+  await writeJsonFileAtomically(learningsFile, learnings);
   if (!exists && legacyLearningsFile !== learningsFile) {
     await fs.rm(legacyLearningsFile, { force: true }).catch(() => undefined);
   }
diff --git a/extensions/openshell/src/cli.ts b/extensions/openshell/src/cli.ts
index 19b61667865..1748c566c60 100644
--- a/extensions/openshell/src/cli.ts
+++ b/extensions/openshell/src/cli.ts
@@ -1,6 +1,6 @@
-import fs from "node:fs";
 import { createRequire } from "node:module";
 import path from "node:path";
+import { loadJsonFile } from "openclaw/plugin-sdk/json-store";
 import {
   buildExecRemoteCommand,
   createSshSandboxSessionFromConfigText,
@@ -37,11 +37,11 @@ function resolveBundledOpenShellCommand(): string | null {
   }
   try {
     const packageJsonPath = require.resolve("openshell/package.json");
-    const packageJson = JSON.parse(fs.readFileSync(packageJsonPath, "utf8")) as {
+    const packageJson = loadJsonFile<{
       bin?: string | Record<string, string>;
-    };
+    }>(packageJsonPath);
     const relativeBin =
-      typeof packageJson.bin === "string" ? packageJson.bin : packageJson.bin?.openshell;
+      typeof packageJson?.bin === "string" ? packageJson.bin : packageJson?.bin?.openshell;
     cachedBundledOpenShellCommand = relativeBin
       ? path.resolve(path.dirname(packageJsonPath), relativeBin)
       : null;
diff --git a/extensions/qqbot/src/engine/commands/builtin/log-helpers.ts b/extensions/qqbot/src/engine/commands/builtin/log-helpers.ts
index fd039fbaaea..3e8f21a0746 100644
--- a/extensions/qqbot/src/engine/commands/builtin/log-helpers.ts
+++ b/extensions/qqbot/src/engine/commands/builtin/log-helpers.ts
@@ -1,5 +1,6 @@
 import fs from "node:fs";
 import path from "node:path";
+import { loadJsonFile } from "openclaw/plugin-sdk/json-store";
 import { getHomeDir, getQQBotDataDir, isWindows } from "../../utils/platform.js";
 import type { SlashCommandResult } from "../slash-commands.js";
 
@@ -10,10 +11,7 @@ function getConfiguredLogFiles(): string[] {
   for (const cli of ["openclaw", "clawdbot", "moltbot"]) {
     try {
       const cfgPath = path.join(homeDir, `.${cli}`, `${cli}.json`);
-      if (!fs.existsSync(cfgPath)) {
-        continue;
-      }
-      const cfg = JSON.parse(fs.readFileSync(cfgPath, "utf8"));
+      const cfg = loadJsonFile<{ logging?: { file?: unknown } }>(cfgPath);
       const logFile = cfg?.logging?.file;
       if (logFile && typeof logFile === "string") {
         files.push(path.resolve(logFile));
diff --git a/extensions/qqbot/src/engine/config/credential-backup.ts b/extensions/qqbot/src/engine/config/credential-backup.ts
index 0279818c8c4..619bcc8c1de 100644
--- a/extensions/qqbot/src/engine/config/credential-backup.ts
+++ b/extensions/qqbot/src/engine/config/credential-backup.ts
@@ -26,6 +26,7 @@
  */
 
 import fs from "node:fs";
+import { loadJsonFile } from "openclaw/plugin-sdk/json-store";
 import { replaceFileAtomicSync } from "openclaw/plugin-sdk/security-runtime";
 import { getCredentialBackupFile, getLegacyCredentialBackupFile } from "../utils/data-paths.js";
 
@@ -70,17 +71,15 @@ export function loadCredentialBackup(accountId?: string): CredentialBackup | nul
   try {
     if (accountId) {
       const newPath = getCredentialBackupFile(accountId);
-      if (fs.existsSync(newPath)) {
-        const data = JSON.parse(fs.readFileSync(newPath, "utf8")) as CredentialBackup;
-        if (data?.appId && data.clientSecret) {
-          return data;
-        }
+      const data = loadJsonFile<CredentialBackup>(newPath);
+      if (data?.appId && data.clientSecret) {
+        return data;
       }
     }
 
     const legacy = getLegacyCredentialBackupFile();
-    if (fs.existsSync(legacy)) {
-      const data = JSON.parse(fs.readFileSync(legacy, "utf8")) as CredentialBackup;
+    const data = loadJsonFile<CredentialBackup>(legacy);
+    if (data) {
       if (!data?.appId || !data?.clientSecret) {
         return null;
       }
diff --git a/extensions/skill-workshop/src/store.ts b/extensions/skill-workshop/src/store.ts
index c58c163ad2c..e5c7785c0e5 100644
--- a/extensions/skill-workshop/src/store.ts
+++ b/extensions/skill-workshop/src/store.ts
@@ -42,10 +42,8 @@ async function withLock<T>(key: string, task: () => Promise<T>): Promise<T> {
   }
 }
 
-async function readJson(rootDir: string, filePath: string): Promise<StoreFile> {
-  const parsed = await privateFileStore(rootDir).readJsonIfExists<StoreFile>(
-    path.relative(rootDir, filePath),
-  );
+async function readJson(rootDir: string, relativePath: string): Promise<StoreFile> {
+  const parsed = await privateFileStore(rootDir).readJsonIfExists<StoreFile>(relativePath);
   if (!parsed) {
     return { version: 1, proposals: [] };
   }
@@ -77,8 +75,12 @@ function normalizeReviewState(
   };
 }
 
-async function atomicWriteJson(rootDir: string, filePath: string, data: StoreFile): Promise<void> {
-  await privateFileStore(rootDir).writeJson(path.relative(rootDir, filePath), data, {
+async function atomicWriteJson(
+  rootDir: string,
+  relativePath: string,
+  data: StoreFile,
+): Promise<void> {
+  await privateFileStore(rootDir).writeJson(relativePath, data, {
     trailingNewline: true,
   });
 }
@@ -86,18 +88,16 @@ async function atomicWriteJson(rootDir: string, filePath: string, data: StoreFil
 export class SkillWorkshopStore {
   readonly stateDir: string;
   readonly filePath: string;
+  private readonly relativePath: string;
 
   constructor(params: { stateDir: string; workspaceDir: string }) {
     this.stateDir = path.resolve(params.stateDir);
-    this.filePath = path.join(
-      this.stateDir,
-      "skill-workshop",
-      `${workspaceKey(params.workspaceDir)}.json`,
-    );
+    this.relativePath = path.join("skill-workshop", `${workspaceKey(params.workspaceDir)}.json`);
+    this.filePath = path.join(this.stateDir, this.relativePath);
   }
 
   async list(status?: SkillWorkshopStatus): Promise<SkillProposal[]> {
-    const file = await readJson(this.stateDir, this.filePath);
+    const file = await readJson(this.stateDir, this.relativePath);
     const proposals = status
       ? file.proposals.filter((proposal) => proposal.status === status)
       : file.proposals;
@@ -110,7 +110,7 @@ export class SkillWorkshopStore {
 
   async add(proposal: SkillProposal, maxPending: number): Promise<SkillProposal> {
     return await withLock(this.filePath, async () => {
-      const file = await readJson(this.stateDir, this.filePath);
+      const file = await readJson(this.stateDir, this.relativePath);
       const duplicate = file.proposals.find(
         (item) =>
           (item.status === "pending" || item.status === "quarantined") &&
@@ -132,7 +132,7 @@ export class SkillWorkshopStore {
             ).length <= maxPending
         );
       });
-      await atomicWriteJson(this.stateDir, this.filePath, {
+      await atomicWriteJson(this.stateDir, this.relativePath, {
         ...file,
         version: 1,
         proposals: nextProposals,
@@ -143,41 +143,41 @@ export class SkillWorkshopStore {
 
   async updateStatus(id: string, status: SkillWorkshopStatus): Promise<SkillProposal> {
     return await withLock(this.filePath, async () => {
-      const file = await readJson(this.stateDir, this.filePath);
+      const file = await readJson(this.stateDir, this.relativePath);
       const index = file.proposals.findIndex((proposal) => proposal.id === id);
       if (index < 0) {
         throw new Error(`proposal not found: ${id}`);
       }
       const updated = { ...file.proposals[index], status, updatedAt: Date.now() };
       file.proposals[index] = updated;
-      await atomicWriteJson(this.stateDir, this.filePath, file);
+      await atomicWriteJson(this.stateDir, this.relativePath, file);
       return updated;
     });
   }
 
   async recordReviewTurn(toolCalls: number): Promise<SkillWorkshopReviewState> {
     return await withLock(this.filePath, async () => {
-      const file = await readJson(this.stateDir, this.filePath);
+      const file = await readJson(this.stateDir, this.relativePath);
       const current = normalizeReviewState(file.review);
       const next = {
         ...current,
         turnsSinceReview: current.turnsSinceReview + 1,
         toolCallsSinceReview: current.toolCallsSinceReview + Math.max(0, Math.trunc(toolCalls)),
       };
-      await atomicWriteJson(this.stateDir, this.filePath, { ...file, review: next });
+      await atomicWriteJson(this.stateDir, this.relativePath, { ...file, review: next });
       return next;
     });
   }
 
   async markReviewed(): Promise<SkillWorkshopReviewState> {
     return await withLock(this.filePath, async () => {
-      const file = await readJson(this.stateDir, this.filePath);
+      const file = await readJson(this.stateDir, this.relativePath);
       const next = {
         turnsSinceReview: 0,
         toolCallsSinceReview: 0,
         lastReviewAt: Date.now(),
       };
-      await atomicWriteJson(this.stateDir, this.filePath, { ...file, review: next });
+      await atomicWriteJson(this.stateDir, this.relativePath, { ...file, review: next });
       return next;
     });
   }
diff --git a/extensions/telegram/src/update-offset-store.ts b/extensions/telegram/src/update-offset-store.ts
index 5d8aacef2c5..245e2b5af76 100644
--- a/extensions/telegram/src/update-offset-store.ts
+++ b/extensions/telegram/src/update-offset-store.ts
@@ -1,7 +1,7 @@
 import fs from "node:fs/promises";
 import os from "node:os";
 import path from "node:path";
-import { writeJsonFileAtomically } from "openclaw/plugin-sdk/json-store";
+import { readJsonFileWithFallback, writeJsonFileAtomically } from "openclaw/plugin-sdk/json-store";
 import { resolveStateDir } from "openclaw/plugin-sdk/state-paths";
 
 const STORE_VERSION = 2;
@@ -45,30 +45,30 @@ function extractBotIdFromToken(token?: string): string | null {
   return rawBotId;
 }
 
-function safeParseState(raw: string): TelegramUpdateOffsetState | null {
+function safeParseState(parsed: unknown): TelegramUpdateOffsetState | null {
   try {
-    const parsed = JSON.parse(raw) as {
+    const state = parsed as {
       version?: number;
       lastUpdateId?: number | null;
       botId?: string | null;
     };
-    if (parsed?.version !== STORE_VERSION && parsed?.version !== 1) {
+    if (state?.version !== STORE_VERSION && state?.version !== 1) {
       return null;
     }
-    if (parsed.lastUpdateId !== null && !isValidUpdateId(parsed.lastUpdateId)) {
+    if (state.lastUpdateId !== null && !isValidUpdateId(state.lastUpdateId)) {
       return null;
     }
     if (
-      parsed.version === STORE_VERSION &&
-      parsed.botId !== null &&
-      typeof parsed.botId !== "string"
+      state.version === STORE_VERSION &&
+      state.botId !== null &&
+      typeof state.botId !== "string"
     ) {
       return null;
     }
     return {
       version: STORE_VERSION,
-      lastUpdateId: parsed.lastUpdateId ?? null,
-      botId: parsed.version === STORE_VERSION ? (parsed.botId ?? null) : null,
+      lastUpdateId: state.lastUpdateId ?? null,
+      botId: state.version === STORE_VERSION ? (state.botId ?? null) : null,
     };
   } catch {
     return null;
@@ -81,24 +81,16 @@ export async function readTelegramUpdateOffset(params: {
   env?: NodeJS.ProcessEnv;
 }): Promise<number | null> {
   const filePath = resolveTelegramUpdateOffsetPath(params.accountId, params.env);
-  try {
-    const raw = await fs.readFile(filePath, "utf-8");
-    const parsed = safeParseState(raw);
-    const expectedBotId = extractBotIdFromToken(params.botToken);
-    if (expectedBotId && parsed?.botId && parsed.botId !== expectedBotId) {
-      return null;
-    }
-    if (expectedBotId && parsed?.botId === null) {
-      return null;
-    }
-    return parsed?.lastUpdateId ?? null;
-  } catch (err) {
-    const code = (err as { code?: string }).code;
-    if (code === "ENOENT") {
-      return null;
-    }
+  const { value } = await readJsonFileWithFallback<unknown>(filePath, null);
+  const parsed = safeParseState(value);
+  const expectedBotId = extractBotIdFromToken(params.botToken);
+  if (expectedBotId && parsed?.botId && parsed.botId !== expectedBotId) {
     return null;
   }
+  if (expectedBotId && parsed?.botId === null) {
+    return null;
+  }
+  return parsed?.lastUpdateId ?? null;
 }
 
 export async function writeTelegramUpdateOffset(params: {
diff --git a/extensions/voice-call/src/realtime-agent-context.ts b/extensions/voice-call/src/realtime-agent-context.ts
index a5f85bc5e7b..3d4630658ae 100644
--- a/extensions/voice-call/src/realtime-agent-context.ts
+++ b/extensions/voice-call/src/realtime-agent-context.ts
@@ -1,6 +1,5 @@
-import { readFile } from "node:fs/promises";
-import path from "node:path";
 import type { OpenClawConfig } from "openclaw/plugin-sdk/config-types";
+import { root } from "openclaw/plugin-sdk/security-runtime";
 import type { VoiceCallConfig } from "./config.js";
 import type { CoreAgentDeps, CoreConfig } from "./core-bridge.js";
 
@@ -42,15 +41,6 @@ function resolveAgentSystemPromptOverride(cfg: CoreConfig, agentId: string): str
   );
 }
 
-function isSafeWorkspaceRelativeFile(file: string): boolean {
-  if (!file.trim() || path.isAbsolute(file)) {
-    return false;
-  }
-  const normalized = path.normalize(file);
-  const parts = normalized.split(/[\\/]+/);
-  return normalized !== "." && !parts.includes("..") && !normalized.includes("\0");
-}
-
 function limitText(text: string, maxChars: number): string {
   if (text.length <= maxChars) {
     return text;
@@ -65,12 +55,15 @@ async function readWorkspaceVoiceContextFiles(params: {
 }): Promise<string[]> {
   const sections: string[] = [];
   let remaining = params.maxChars;
+  const workspaceRoot = await root(params.workspaceDir).catch(() => null);
+  if (!workspaceRoot) {
+    return sections;
+  }
   for (const file of params.files) {
-    if (remaining <= 0 || !isSafeWorkspaceRelativeFile(file)) {
+    if (remaining <= 0) {
       continue;
     }
-    const fullPath = path.join(params.workspaceDir, path.normalize(file));
-    const content = await readFile(fullPath, "utf8").catch(() => undefined);
+    const content = await workspaceRoot.readText(file).catch(() => undefined);
     const trimmed = content?.trim();
     if (!trimmed) {
       continue;
diff --git a/packages/memory-host-sdk/src/host/fs-utils.ts b/packages/memory-host-sdk/src/host/fs-utils.ts
index cbcf140dfb7..25850cfac19 100644
--- a/packages/memory-host-sdk/src/host/fs-utils.ts
+++ b/packages/memory-host-sdk/src/host/fs-utils.ts
@@ -1,4 +1,5 @@
 import { configureFsSafePython } from "@openclaw/fs-safe/config";
+export { root } from "@openclaw/fs-safe/root";
 export { isPathInside } from "@openclaw/fs-safe/path";
 export {
   readRegularFile,
@@ -21,6 +22,7 @@ export function isFileMissingError(
     err &&
     typeof err === "object" &&
     "code" in err &&
-    (err as Partial<NodeJS.ErrnoException>).code === "ENOENT",
+    ((err as Partial<NodeJS.ErrnoException>).code === "ENOENT" ||
+      (err as { code?: unknown }).code === "not-found"),
   );
 }
diff --git a/packages/memory-host-sdk/src/host/read-file.ts b/packages/memory-host-sdk/src/host/read-file.ts
index a8a405b3ff8..dffa1087769 100644
--- a/packages/memory-host-sdk/src/host/read-file.ts
+++ b/packages/memory-host-sdk/src/host/read-file.ts
@@ -6,7 +6,13 @@ import {
   resolveMemorySearchConfig,
   type OpenClawConfig,
 } from "./config-utils.js";
-import { isFileMissingError, isPathInside, readRegularFile, statRegularFile } from "./fs-utils.js";
+import {
+  isFileMissingError,
+  isPathInside,
+  readRegularFile,
+  root,
+  statRegularFile,
+} from "./fs-utils.js";
 import { isMemoryPath, normalizeExtraMemoryPaths } from "./internal.js";
 import {
   buildMemoryReadResult,
@@ -66,6 +72,17 @@ export async function readMemoryFile(params: {
   if (!absPath.endsWith(".md")) {
     throw new Error("path required");
   }
+  if (allowedWorkspace) {
+    try {
+      const workspaceRoot = await root(params.workspaceDir);
+      await workspaceRoot.resolve(relPath);
+    } catch (err) {
+      if (isFileMissingError(err)) {
+        return { text: "", path: relPath };
+      }
+      throw err;
+    }
+  }
   const statResult = await statRegularFile(absPath);
   if (statResult.missing) {
     return { text: "", path: relPath };
diff --git a/src/agents/cli-runner/bundle-mcp-gemini.ts b/src/agents/cli-runner/bundle-mcp-gemini.ts
index e274e817ea8..5dc47f14cac 100644
--- a/src/agents/cli-runner/bundle-mcp-gemini.ts
+++ b/src/agents/cli-runner/bundle-mcp-gemini.ts
@@ -2,6 +2,7 @@ import fs from "node:fs/promises";
 import os from "node:os";
 import path from "node:path";
 import { applyMergePatch } from "../../config/merge-patch.js";
+import { tryReadJson, writeJson } from "../../infra/json-files.js";
 import type { BundleMcpConfig, BundleMcpServerConfig } from "../../plugins/bundle-mcp.js";
 import {
   applyCommonServerConfig,
@@ -11,14 +12,10 @@ import {
 } from "./bundle-mcp-adapter-shared.js";
 
 async function readJsonObject(filePath: string): Promise<Record<string, unknown>> {
-  try {
-    const raw = JSON.parse(await fs.readFile(filePath, "utf-8")) as unknown;
-    return raw && typeof raw === "object" && !Array.isArray(raw)
-      ? ({ ...raw } as Record<string, unknown>)
-      : {};
-  } catch {
-    return {};
-  }
+  const raw = await tryReadJson<unknown>(filePath);
+  return raw && typeof raw === "object" && !Array.isArray(raw)
+    ? ({ ...raw } as Record<string, unknown>)
+    : {};
 }
 
 function resolveEnvPlaceholder(
@@ -86,7 +83,7 @@ export async function writeGeminiSystemSettings(
   if (!isRecord(settings.mcp) || !isRecord(settings.mcpServers)) {
     throw new Error("Gemini MCP settings merge produced an invalid object");
   }
-  await fs.writeFile(settingsPath, `${JSON.stringify(settings, null, 2)}\n`, "utf-8");
+  await writeJson(settingsPath, settings, { trailingNewline: true });
   return {
     env: {
       ...inheritedEnv,
diff --git a/src/agents/cli-runner/bundle-mcp.ts b/src/agents/cli-runner/bundle-mcp.ts
index abb7529cdb0..7b41d88c0ac 100644
--- a/src/agents/cli-runner/bundle-mcp.ts
+++ b/src/agents/cli-runner/bundle-mcp.ts
@@ -5,6 +5,7 @@ import path from "node:path";
 import { applyMergePatch } from "../../config/merge-patch.js";
 import type { CliBackendConfig } from "../../config/types.js";
 import type { OpenClawConfig } from "../../config/types.openclaw.js";
+import { tryReadJson } from "../../infra/json-files.js";
 import { extractMcpServerMap, type BundleMcpConfig } from "../../plugins/bundle-mcp.js";
 import type { CliBundleMcpMode } from "../../plugins/types.js";
 import { loadMergedBundleMcpConfig, toCliBundleMcpServerConfig } from "../bundle-mcp-config.js";
@@ -26,12 +27,7 @@ function resolveBundleMcpMode(mode: CliBundleMcpMode | undefined): CliBundleMcpM
 }
 
 async function readExternalMcpConfig(configPath: string): Promise<BundleMcpConfig> {
-  try {
-    const raw = JSON.parse(await fs.readFile(configPath, "utf-8")) as unknown;
-    return { mcpServers: extractMcpServerMap(raw) };
-  } catch {
-    return { mcpServers: {} };
-  }
+  return { mcpServers: extractMcpServerMap(await tryReadJson<unknown>(configPath)) };
 }
 
 function sortJsonValue(value: unknown): unknown {
diff --git a/src/agents/pi-auth-discovery-core.ts b/src/agents/pi-auth-discovery-core.ts
index 4074c970883..2ac5b00dd57 100644
--- a/src/agents/pi-auth-discovery-core.ts
+++ b/src/agents/pi-auth-discovery-core.ts
@@ -1,5 +1,7 @@
 import fs from "node:fs";
 import type { OpenClawConfig } from "../config/types.openclaw.js";
+import { tryReadJsonSync } from "../infra/json-files.js";
+import { replaceFileAtomicSync } from "../infra/replace-file.js";
 import { isRecord } from "../utils.js";
 import {
   listProviderEnvAuthLookupKeys,
@@ -63,12 +65,7 @@ export function scrubLegacyStaticAuthJsonEntriesForDiscovery(pathname: string):
     return;
   }
 
-  let parsed: unknown;
-  try {
-    parsed = JSON.parse(fs.readFileSync(pathname, "utf8")) as unknown;
-  } catch {
-    return;
-  }
+  const parsed = tryReadJsonSync(pathname);
   if (!isRecord(parsed)) {
     return;
   }
@@ -94,6 +91,11 @@ export function scrubLegacyStaticAuthJsonEntriesForDiscovery(pathname: string):
     return;
   }
 
-  fs.writeFileSync(pathname, `${JSON.stringify(parsed, null, 2)}\n`, "utf8");
-  fs.chmodSync(pathname, 0o600);
+  replaceFileAtomicSync({
+    filePath: pathname,
+    content: `${JSON.stringify(parsed, null, 2)}\n`,
+    dirMode: 0o700,
+    mode: 0o600,
+    tempPrefix: ".pi-auth",
+  });
 }
diff --git a/src/agents/skills-clawhub.ts b/src/agents/skills-clawhub.ts
index e53a76dc782..75dc80886b3 100644
--- a/src/agents/skills-clawhub.ts
+++ b/src/agents/skills-clawhub.ts
@@ -1,4 +1,3 @@
-import fs from "node:fs/promises";
 import path from "node:path";
 import {
   downloadClawHubSkillArchive,
@@ -13,6 +12,7 @@ import { pathExists } from "../infra/fs-safe.js";
 import { withExtractedArchiveRoot } from "../infra/install-flow.js";
 import { installPackageDir } from "../infra/install-package-dir.js";
 import { resolveSafeInstallDir } from "../infra/install-safe-path.js";
+import { tryReadJson, writeJson } from "../infra/json-files.js";
 
 const DOT_DIR = ".clawhub";
 const LEGACY_DOT_DIR = ".clawdhub";
@@ -147,10 +147,8 @@ async function readClawHubSkillsLockfile(workspaceDir: string): Promise<ClawHubS
   ];
   for (const candidate of candidates) {
     try {
-      const raw = JSON.parse(
-        await fs.readFile(candidate, "utf8"),
-      ) as Partial<ClawHubSkillsLockfile>;
-      if (raw.version === 1 && raw.skills && typeof raw.skills === "object") {
+      const raw = await tryReadJson<Partial<ClawHubSkillsLockfile>>(candidate);
+      if (raw?.version === 1 && raw.skills && typeof raw.skills === "object") {
         return {
           version: 1,
           skills: raw.skills,
@@ -168,8 +166,7 @@ async function writeClawHubSkillsLockfile(
   lockfile: ClawHubSkillsLockfile,
 ): Promise<void> {
   const targetPath = path.join(workspaceDir, DOT_DIR, "lock.json");
-  await fs.mkdir(path.dirname(targetPath), { recursive: true });
-  await fs.writeFile(targetPath, `${JSON.stringify(lockfile, null, 2)}\n`, "utf8");
+  await writeJson(targetPath, lockfile, { trailingNewline: true });
 }
 
 async function readClawHubSkillOrigin(skillDir: string): Promise<ClawHubSkillOrigin | null> {
@@ -179,9 +176,9 @@ async function readClawHubSkillOrigin(skillDir: string): Promise<ClawHubSkillOri
   ];
   for (const candidate of candidates) {
     try {
-      const raw = JSON.parse(await fs.readFile(candidate, "utf8")) as Partial<ClawHubSkillOrigin>;
+      const raw = await tryReadJson<Partial<ClawHubSkillOrigin>>(candidate);
       if (
-        raw.version === 1 &&
+        raw?.version === 1 &&
         typeof raw.registry === "string" &&
         typeof raw.slug === "string" &&
         typeof raw.installedVersion === "string" &&
@@ -201,8 +198,7 @@ async function writeClawHubSkillOrigin(
   origin: ClawHubSkillOrigin,
 ): Promise<void> {
   const targetPath = path.join(skillDir, SKILL_ORIGIN_RELATIVE_PATH);
-  await fs.mkdir(path.dirname(targetPath), { recursive: true });
-  await fs.writeFile(targetPath, `${JSON.stringify(origin, null, 2)}\n`, "utf8");
+  await writeJson(targetPath, origin, { trailingNewline: true });
 }
 
 export async function searchSkillsFromClawHub(params: {
diff --git a/src/channels/bundled-channel-catalog-read.ts b/src/channels/bundled-channel-catalog-read.ts
index 0fc10332424..007c8d1ee8d 100644
--- a/src/channels/bundled-channel-catalog-read.ts
+++ b/src/channels/bundled-channel-catalog-read.ts
@@ -1,5 +1,6 @@
 import fs from "node:fs";
 import path from "node:path";
+import { tryReadJsonSync } from "../infra/json-files.js";
 import { resolveOpenClawPackageRootSync } from "../infra/openclaw-root.js";
 import { listChannelCatalogEntries } from "../plugins/channel-catalog-registry.js";
 import type { PluginPackageChannel } from "../plugins/manifest.js";
@@ -50,19 +51,15 @@ function readOfficialCatalogFileSync(): ChannelCatalogEntryLike[] {
       officialCatalogFileCache.set(candidate, null);
       continue;
     }
-    try {
-      const payload = JSON.parse(fs.readFileSync(candidate, "utf8")) as {
-        entries?: unknown;
-      };
+    const payload = tryReadJsonSync<{ entries?: unknown }>(candidate);
+    if (payload) {
       const entries = Array.isArray(payload.entries)
         ? (payload.entries as ChannelCatalogEntryLike[])
         : [];
       officialCatalogFileCache.set(candidate, entries);
       return entries;
-    } catch {
-      officialCatalogFileCache.set(candidate, null);
-      continue;
     }
+    officialCatalogFileCache.set(candidate, null);
   }
   return [];
 }
diff --git a/src/channels/plugins/catalog.ts b/src/channels/plugins/catalog.ts
index c6d5d78b412..9e4a84ff021 100644
--- a/src/channels/plugins/catalog.ts
+++ b/src/channels/plugins/catalog.ts
@@ -1,6 +1,6 @@
-import fs from "node:fs";
 import path from "node:path";
 import { MANIFEST_KEY } from "../../compat/legacy-names.js";
+import { tryReadJsonSync } from "../../infra/json-files.js";
 import { isPrereleaseSemverVersion, parseRegistryNpmSpec } from "../../infra/npm-registry-spec.js";
 import { resolveOpenClawPackageRootSync } from "../../infra/openclaw-root.js";
 import { listChannelCatalogEntries } from "../../plugins/channel-catalog-registry.js";
@@ -135,15 +135,11 @@ function loadExternalCatalogEntries(options: CatalogOptions): ExternalCatalogEnt
 function loadCatalogEntriesFromPaths(paths: Iterable<string>): ExternalCatalogEntry[] {
   const entries: ExternalCatalogEntry[] = [];
   for (const resolvedPath of paths) {
-    if (!fs.existsSync(resolvedPath)) {
+    const payload = tryReadJsonSync(resolvedPath);
+    if (payload === null) {
       continue;
     }
-    try {
-      const payload = JSON.parse(fs.readFileSync(resolvedPath, "utf-8")) as unknown;
-      entries.push(...parseCatalogEntries(payload));
-    } catch {
-      // Ignore invalid catalog files.
-    }
+    entries.push(...parseCatalogEntries(payload));
   }
   return entries;
 }
@@ -158,18 +154,14 @@ function loadOfficialCatalogEntriesFromPaths(paths: Iterable<string>): ExternalC
       }
       continue;
     }
-    if (!fs.existsSync(resolvedPath)) {
+    const payload = tryReadJsonSync(resolvedPath);
+    if (payload === null) {
       officialCatalogEntriesByPath.set(resolvedPath, null);
       continue;
     }
-    try {
-      const payload = JSON.parse(fs.readFileSync(resolvedPath, "utf-8")) as unknown;
-      const parsed = parseCatalogEntries(payload);
-      officialCatalogEntriesByPath.set(resolvedPath, parsed);
-      entries.push(...parsed);
-    } catch {
-      officialCatalogEntriesByPath.set(resolvedPath, null);
-    }
+    const parsed = parseCatalogEntries(payload);
+    officialCatalogEntriesByPath.set(resolvedPath, parsed);
+    entries.push(...parsed);
   }
   return entries;
 }
diff --git a/src/cli/plugin-install-config-policy.ts b/src/cli/plugin-install-config-policy.ts
index 7deeab95ecb..bbdbc7cd000 100644
--- a/src/cli/plugin-install-config-policy.ts
+++ b/src/cli/plugin-install-config-policy.ts
@@ -1,6 +1,7 @@
 import fs from "node:fs";
 import path from "node:path";
 import type { Command } from "commander";
+import { tryReadJsonSync } from "../infra/json-files.js";
 import { findBundledPluginSource } from "../plugins/bundled-sources.js";
 import { loadPluginManifest } from "../plugins/manifest.js";
 import {
@@ -40,24 +41,17 @@ function readBundledInstallRecoveryMetadata(rootDir: string): {
   }
   const manifest = loadPluginManifest(rootDir, false);
   const pluginId = manifest.ok ? manifest.manifest.id : undefined;
-  try {
-    const parsed = JSON.parse(fs.readFileSync(packageJsonPath, "utf8")) as {
-      openclaw?: {
-        install?: {
-          allowInvalidConfigRecovery?: boolean;
-        };
+  const parsed = tryReadJsonSync<{
+    openclaw?: {
+      install?: {
+        allowInvalidConfigRecovery?: boolean;
       };
     };
-    return {
-      ...(pluginId ? { pluginId } : {}),
-      allowInvalidConfigRecovery: parsed.openclaw?.install?.allowInvalidConfigRecovery === true,
-    };
-  } catch {
-    return {
-      ...(pluginId ? { pluginId } : {}),
-      allowInvalidConfigRecovery: false,
-    };
-  }
+  }>(packageJsonPath);
+  return {
+    ...(pluginId ? { pluginId } : {}),
+    allowInvalidConfigRecovery: parsed?.openclaw?.install?.allowInvalidConfigRecovery === true,
+  };
 }
 
 function resolveBundledInstallRecoveryMetadata(
diff --git a/src/cli/update-cli/update-command.ts b/src/cli/update-cli/update-command.ts
index 2a5012853ab..557e6cba192 100644
--- a/src/cli/update-cli/update-command.ts
+++ b/src/cli/update-cli/update-command.ts
@@ -28,6 +28,7 @@ import {
 } from "../../daemon/service.js";
 import { createLowDiskSpaceWarning } from "../../infra/disk-space.js";
 import { pathExists } from "../../infra/fs-safe.js";
+import { readJsonIfExists, writeJson } from "../../infra/json-files.js";
 import { runGlobalPackageUpdateSteps } from "../../infra/package-update-steps.js";
 import { getSelfAndAncestorPidsSync } from "../../infra/restart-stale-pids.js";
 import { nodeVersionSatisfiesEngine } from "../../infra/runtime-guard.js";
@@ -1702,15 +1703,14 @@ async function writePostCorePluginUpdateResultFile(
   if (!filePath) {
     return;
   }
-  await fs.writeFile(filePath, `${JSON.stringify(result)}\n`, "utf-8");
+  await writeJson(filePath, result, { trailingNewline: true });
 }
 
 async function readPostCorePluginUpdateResultFile(
   filePath: string,
 ): Promise<PostCorePluginUpdateResult | undefined> {
   try {
-    const raw = await fs.readFile(filePath, "utf-8");
-    const parsed = JSON.parse(raw) as PostCorePluginUpdateResult;
+    const parsed = await readJsonIfExists<PostCorePluginUpdateResult>(filePath);
     if (
       parsed &&
       typeof parsed === "object" &&
diff --git a/src/commands/doctor-device-pairing.ts b/src/commands/doctor-device-pairing.ts
index b9c9722f3f0..ea636a9bac9 100644
--- a/src/commands/doctor-device-pairing.ts
+++ b/src/commands/doctor-device-pairing.ts
@@ -1,4 +1,3 @@
-import fs from "node:fs";
 import path from "node:path";
 import { formatCliCommand } from "../cli/command-format.js";
 import { resolveStateDir } from "../config/paths.js";
@@ -12,7 +11,7 @@ import {
   type DevicePairingPendingRequest,
   type PairedDevice,
 } from "../infra/device-pairing.js";
-import { JsonFileReadError } from "../infra/json-files.js";
+import { JsonFileReadError, tryReadJsonSync } from "../infra/json-files.js";
 import type { DeviceAuthStore } from "../shared/device-auth.js";
 import { normalizeDeviceAuthScopes } from "../shared/device-auth.js";
 import { roleScopesAllow } from "../shared/operator-scope-compat.js";
@@ -391,14 +390,7 @@ function collectPairedRecordIssues(snapshot: DoctorPairingSnapshot): string[] {
 }
 
 function readJsonFile(filePath: string): unknown {
-  try {
-    if (!fs.existsSync(filePath)) {
-      return null;
-    }
-    return JSON.parse(fs.readFileSync(filePath, "utf8"));
-  } catch {
-    return null;
-  }
+  return tryReadJsonSync(filePath);
 }
 
 function readLocalIdentity(env: NodeJS.ProcessEnv = process.env): StoredDeviceIdentity | null {
diff --git a/src/commands/doctor-plugin-registry.ts b/src/commands/doctor-plugin-registry.ts
index dd97d7a6366..1238b634f24 100644
--- a/src/commands/doctor-plugin-registry.ts
+++ b/src/commands/doctor-plugin-registry.ts
@@ -3,6 +3,7 @@ import path from "node:path";
 import { formatCliCommand } from "../cli/command-format.js";
 import type { OpenClawConfig } from "../config/types.openclaw.js";
 import { saveJsonFile } from "../infra/json-file.js";
+import { tryReadJsonSync } from "../infra/json-files.js";
 import { resolveDefaultPluginNpmDir } from "../plugins/install-paths.js";
 import type { InstalledPluginIndexRecordStoreOptions } from "../plugins/installed-plugin-index-records.js";
 import { loadInstalledPluginIndex } from "../plugins/installed-plugin-index.js";
@@ -36,12 +37,8 @@ function isRecord(value: unknown): value is Record<string, unknown> {
 }
 
 function readJsonObject(filePath: string): Record<string, unknown> | null {
-  try {
-    const parsed = JSON.parse(fs.readFileSync(filePath, "utf8")) as unknown;
-    return isRecord(parsed) ? parsed : null;
-  } catch {
-    return null;
-  }
+  const parsed = tryReadJsonSync(filePath);
+  return isRecord(parsed) ? parsed : null;
 }
 
 function readStringMap(value: unknown): Record<string, string> {
diff --git a/src/crestodian/rescue-message.ts b/src/crestodian/rescue-message.ts
index 9ce375d3731..4402eb70b62 100644
--- a/src/crestodian/rescue-message.ts
+++ b/src/crestodian/rescue-message.ts
@@ -4,6 +4,7 @@ import path from "node:path";
 import type { CommandContext } from "../auto-reply/reply/commands-types.js";
 import { resolveStateDir } from "../config/paths.js";
 import type { OpenClawConfig } from "../config/types.openclaw.js";
+import { tryReadJson, writeJson } from "../infra/json-files.js";
 import type { RuntimeEnv } from "../runtime.js";
 import {
   executeCrestodianOperation,
@@ -81,7 +82,10 @@ async function readPending(
   now = new Date(),
 ): Promise<RescuePendingOperation | null> {
   try {
-    const parsed = JSON.parse(await fs.readFile(pendingPath, "utf8")) as RescuePendingOperation;
+    const parsed = await tryReadJson<RescuePendingOperation>(pendingPath);
+    if (!parsed) {
+      return null;
+    }
     if (Date.parse(parsed.expiresAt) <= now.getTime()) {
       await fs.rm(pendingPath, { force: true });
       return null;
@@ -93,13 +97,10 @@ async function readPending(
 }
 
 async function writePending(pendingPath: string, pending: RescuePendingOperation): Promise<void> {
-  await fs.mkdir(path.dirname(pendingPath), { recursive: true });
-  await fs.writeFile(pendingPath, `${JSON.stringify(pending, null, 2)}\n`, {
-    encoding: "utf8",
+  await writeJson(pendingPath, pending, {
+    dirMode: 0o700,
     mode: 0o600,
-  });
-  await fs.chmod(pendingPath, 0o600).catch(() => {
-    // Best-effort on platforms/filesystems without POSIX modes.
+    trailingNewline: true,
   });
 }
 
diff --git a/src/gateway/managed-image-attachments.ts b/src/gateway/managed-image-attachments.ts
index c73d38f5688..0ee8807ff8f 100644
--- a/src/gateway/managed-image-attachments.ts
+++ b/src/gateway/managed-image-attachments.ts
@@ -5,6 +5,7 @@ import path from "node:path";
 import { getLatestSubagentRunByChildSessionKey } from "../agents/subagent-registry.js";
 import { resolveStateDir } from "../config/paths.js";
 import { readLocalFileSafely } from "../infra/fs-safe.js";
+import { tryReadJson, writeJson } from "../infra/json-files.js";
 import { safeFileURLToPath } from "../infra/local-file-access.js";
 import {
   getImageMetadata,
@@ -381,8 +382,7 @@ async function getVariantStats(filePath: string) {
 
 async function writeManagedImageRecord(record: ManagedImageRecord, stateDir = resolveStateDir()) {
   const recordPath = resolveOutgoingRecordPath(record.attachmentId, stateDir);
-  await fs.mkdir(path.dirname(recordPath), { recursive: true });
-  await fs.writeFile(recordPath, JSON.stringify(record, null, 2), "utf-8");
+  await writeJson(recordPath, record, { trailingNewline: true });
 }
 
 async function deleteManagedImageRecordArtifacts(
@@ -479,10 +479,8 @@ export async function cleanupManagedOutgoingImageRecords(params?: {
       continue;
     }
     const recordPath = path.join(recordsDir, name);
-    let record: ManagedImageRecord;
-    try {
-      record = JSON.parse(await fs.readFile(recordPath, "utf-8")) as ManagedImageRecord;
-    } catch {
+    const record = await tryReadJson<ManagedImageRecord>(recordPath);
+    if (!record) {
       try {
         await fs.rm(recordPath, { force: true });
       } catch {
diff --git a/src/gateway/server-methods/agents-mutate.test.ts b/src/gateway/server-methods/agents-mutate.test.ts
index 4edeab726a0..324639ba0ff 100644
--- a/src/gateway/server-methods/agents-mutate.test.ts
+++ b/src/gateway/server-methods/agents-mutate.test.ts
@@ -49,6 +49,13 @@ const mocks = vi.hoisted(() => ({
     realPath: "/workspace/test-agent/AGENTS.md",
     stat: { size: 0, mtimeMs: 0 },
   })),
+  rootStat: vi.fn(async (_params?: unknown) => ({
+    isFile: true,
+    isSymbolicLink: false,
+    mtimeMs: 0,
+    nlink: 1,
+    size: 0,
+  })),
   rootWrite: vi.fn(async (_params?: unknown) => {}),
 }));
 
@@ -119,6 +126,7 @@ vi.mock("../../infra/fs-safe.js", async () => {
     root: vi.fn(async (rootDir: string) => ({
       open: async (relativePath: string, options?: Record<string, unknown>) =>
         await mocks.rootOpen({ rootDir, relativePath, ...options }),
+      stat: async (relativePath: string) => await mocks.rootStat({ rootDir, relativePath }),
       read: async (relativePath: string, options?: Record<string, unknown>) =>
         await mocks.rootRead({ rootDir, relativePath, ...options }),
       write: async (
@@ -190,18 +198,28 @@ beforeEach(() => {
     realPath: "/workspace/test-agent/AGENTS.md",
     stat: { size: 0, mtimeMs: 0 },
   });
+  mocks.rootStat.mockResolvedValue({
+    isFile: true,
+    isSymbolicLink: false,
+    mtimeMs: 0,
+    nlink: 1,
+    size: 0,
+  });
   mocks.rootWrite.mockResolvedValue(undefined);
 });
 
 function makeRootForTest(overrides?: {
   open?: (params: Record<string, unknown>) => Promise<unknown>;
   read?: (params: Record<string, unknown>) => Promise<unknown>;
+  stat?: (params: Record<string, unknown>) => Promise<unknown>;
   write?: (params: Record<string, unknown>) => Promise<unknown>;
 }) {
   return async (rootDir: string) =>
     ({
       open: async (relativePath: string, options?: Record<string, unknown>) =>
         await (overrides?.open ?? mocks.rootOpen)({ rootDir, relativePath, ...options }),
+      stat: async (relativePath: string) =>
+        await (overrides?.stat ?? mocks.rootStat)({ rootDir, relativePath }),
       read: async (relativePath: string, options?: Record<string, unknown>) =>
         await (overrides?.read ?? mocks.rootRead)({ rootDir, relativePath, ...options }),
       write: async (
@@ -1156,19 +1174,19 @@ describe("agents.files.list", () => {
     const rootOpen = vi.fn(async () => {
       throw createErrnoError("EACCES");
     });
-    agentsTesting.setDepsForTests({ root: makeRootForTest({ open: rootOpen }) });
-    mocks.fsLstat.mockImplementation(async (...args: unknown[]) => {
-      if (args[0] === "/workspace/main/AGENTS.md") {
-        return makeFileStat({ size: 17, mtimeMs: 4567 });
-      }
-      throw createEnoentError();
-    });
-    mocks.fsStat.mockImplementation(async (...args: unknown[]) => {
-      if (args[0] === "/workspace/main/AGENTS.md") {
-        return makeFileStat({ size: 17, mtimeMs: 4567 });
+    const rootStat = vi.fn(async ({ relativePath }: Record<string, unknown>) => {
+      if (relativePath === "AGENTS.md") {
+        return {
+          isFile: true,
+          isSymbolicLink: false,
+          mtimeMs: 4567,
+          nlink: 1,
+          size: 17,
+        };
       }
       throw createEnoentError();
     });
+    agentsTesting.setDepsForTests({ root: makeRootForTest({ open: rootOpen, stat: rootStat }) });
 
     const { respond, promise } = makeCall("agents.files.list", { agentId: "main" });
     await promise;
diff --git a/src/gateway/server-methods/agents.ts b/src/gateway/server-methods/agents.ts
index 7a053627f7d..60a5b382a3d 100644
--- a/src/gateway/server-methods/agents.ts
+++ b/src/gateway/server-methods/agents.ts
@@ -33,7 +33,6 @@ import {
 } from "../../config/sessions.js";
 import type { IdentityConfig } from "../../config/types.base.js";
 import type { OpenClawConfig } from "../../config/types.openclaw.js";
-import { sameFileIdentity } from "../../infra/fs-safe-advanced.js";
 import { root, FsSafeError, type ReadResult } from "../../infra/fs-safe.js";
 import { movePathToTrash } from "../../plugin-sdk/browser-maintenance.js";
 import { DEFAULT_AGENT_ID, normalizeAgentId } from "../../routing/session-key.js";
@@ -131,46 +130,34 @@ type FileMeta = {
   updatedAtMs: number;
 };
 
-function isPathInsideDirectory(rootDir: string, candidatePath: string): boolean {
-  const relative = path.relative(rootDir, candidatePath);
-  return relative === "" || (!relative.startsWith("..") && !path.isAbsolute(relative));
-}
+type WorkspaceRoot = Awaited<ReturnType<typeof root>>;
 
 async function statWorkspaceFileSafely(
-  workspaceDir: string,
+  workspaceRoot: WorkspaceRoot,
   name: string,
 ): Promise<FileMeta | null> {
   try {
-    const workspaceReal = await fs.realpath(workspaceDir);
-    const candidatePath = path.resolve(workspaceReal, name);
-    if (!isPathInsideDirectory(workspaceReal, candidatePath)) {
+    const stat = await workspaceRoot.stat(name);
+    if (!stat.isFile || stat.isSymbolicLink || stat.nlink > 1) {
       return null;
     }
-
-    const pathStat = await fs.lstat(candidatePath);
-    if (!pathStat.isFile() || pathStat.nlink > 1) {
-      return null;
-    }
-
-    const realPath = await fs.realpath(candidatePath);
-    if (!isPathInsideDirectory(workspaceReal, realPath)) {
-      return null;
-    }
-
-    const realStat = await fs.stat(realPath);
-    if (!realStat.isFile() || realStat.nlink > 1 || !sameFileIdentity(pathStat, realStat)) {
-      return null;
-    }
-
     return {
-      size: realStat.size,
-      updatedAtMs: Math.floor(realStat.mtimeMs),
+      size: stat.size,
+      updatedAtMs: Math.floor(stat.mtimeMs),
     };
   } catch {
     return null;
   }
 }
 
+async function openWorkspaceRootSafely(workspaceDir: string): Promise<WorkspaceRoot | null> {
+  try {
+    return await agentsHandlerDeps.root(workspaceDir);
+  } catch {
+    return null;
+  }
+}
+
 async function listAgentFiles(workspaceDir: string, options?: { hideBootstrap?: boolean }) {
   const files: Array<{
     name: string;
@@ -180,12 +167,25 @@ async function listAgentFiles(workspaceDir: string, options?: { hideBootstrap?:
     updatedAtMs?: number;
   }> = [];
 
+  const workspaceRoot = await openWorkspaceRootSafely(workspaceDir);
+  if (!workspaceRoot) {
+    const missingNames = [
+      ...(options?.hideBootstrap ? BOOTSTRAP_FILE_NAMES_POST_ONBOARDING : BOOTSTRAP_FILE_NAMES),
+      DEFAULT_MEMORY_FILENAME,
+    ];
+    return missingNames.map((name) => ({
+      name,
+      path: path.join(workspaceDir, name),
+      missing: true,
+    }));
+  }
+
   const bootstrapFileNames = options?.hideBootstrap
     ? BOOTSTRAP_FILE_NAMES_POST_ONBOARDING
     : BOOTSTRAP_FILE_NAMES;
   for (const name of bootstrapFileNames) {
     const filePath = path.join(workspaceDir, name);
-    const meta = await statWorkspaceFileSafely(workspaceDir, name);
+    const meta = await statWorkspaceFileSafely(workspaceRoot, name);
     if (meta) {
       files.push({
         name,
@@ -199,7 +199,7 @@ async function listAgentFiles(workspaceDir: string, options?: { hideBootstrap?:
     }
   }
 
-  const primaryMeta = await statWorkspaceFileSafely(workspaceDir, DEFAULT_MEMORY_FILENAME);
+  const primaryMeta = await statWorkspaceFileSafely(workspaceRoot, DEFAULT_MEMORY_FILENAME);
   if (primaryMeta) {
     files.push({
       name: DEFAULT_MEMORY_FILENAME,
@@ -757,8 +757,9 @@ export const agentsHandlers: GatewayRequestHandlers = {
     await fs.mkdir(workspaceDir, { recursive: true });
     const filePath = path.join(workspaceDir, name);
     const content = params.content;
+    let workspaceRoot: WorkspaceRoot;
     try {
-      const workspaceRoot = await agentsHandlerDeps.root(workspaceDir);
+      workspaceRoot = await agentsHandlerDeps.root(workspaceDir);
       await workspaceRoot.write(name, content, { encoding: "utf8" });
     } catch (err) {
       if (!(err instanceof FsSafeError)) {
@@ -767,7 +768,7 @@ export const agentsHandlers: GatewayRequestHandlers = {
       respondWorkspaceFileUnsafe(respond, name);
       return;
     }
-    const meta = await statWorkspaceFileSafely(workspaceDir, name);
+    const meta = await statWorkspaceFileSafely(workspaceRoot, name);
     respond(
       true,
       {
diff --git a/src/infra/backup-create.ts b/src/infra/backup-create.ts
index 696b0f9bc3f..92bb158d1a4 100644
--- a/src/infra/backup-create.ts
+++ b/src/infra/backup-create.ts
@@ -13,6 +13,7 @@ import {
 import { isPathWithin } from "../commands/cleanup-utils.js";
 import { resolveHomeDir, resolveUserPath } from "../utils.js";
 import { resolveRuntimeServiceVersion } from "../version.js";
+import { writeJson } from "./json-files.js";
 
 type TarRuntime = typeof import("tar");
 
@@ -366,7 +367,7 @@ export async function createBackupArchive(
       oauthDir: plan.oauthDir,
       workspaceDirs: plan.workspaceDirs,
     });
-    await fs.writeFile(manifestPath, `${JSON.stringify(manifest, null, 2)}\n`, "utf8");
+    await writeJson(manifestPath, manifest, { trailingNewline: true });
 
     const tar = await loadTarRuntime();
     const stateAsset = result.assets.find((asset) => asset.kind === "state");
diff --git a/src/infra/device-auth-store.ts b/src/infra/device-auth-store.ts
index 3aca1e776c6..99c93c2c2e9 100644
--- a/src/infra/device-auth-store.ts
+++ b/src/infra/device-auth-store.ts
@@ -1,4 +1,3 @@
-import fs from "node:fs";
 import path from "node:path";
 import { z } from "zod";
 import { resolveStateDir } from "../config/paths.js";
@@ -9,7 +8,6 @@ import {
   storeDeviceAuthTokenInStore,
 } from "../shared/device-auth-store.js";
 import type { DeviceAuthStore } from "../shared/device-auth.js";
-import { safeParseJsonWithSchema } from "../utils/zod-parse.js";
 import { privateFileStoreSync } from "./private-file-store.js";
 
 const DEVICE_AUTH_FILE = "device-auth.json";
@@ -25,11 +23,11 @@ function resolveDeviceAuthPath(env: NodeJS.ProcessEnv = process.env): string {
 
 function readStore(filePath: string): DeviceAuthStore | null {
   try {
-    if (!fs.existsSync(filePath)) {
-      return null;
-    }
-    const raw = fs.readFileSync(filePath, "utf8");
-    return safeParseJsonWithSchema(DeviceAuthStoreSchema, raw);
+    const parsed = privateFileStoreSync(path.dirname(filePath)).readJsonIfExists(
+      path.basename(filePath),
+    );
+    const store = DeviceAuthStoreSchema.safeParse(parsed);
+    return store.success ? store.data : null;
   } catch {
     return null;
   }
diff --git a/src/infra/device-identity.ts b/src/infra/device-identity.ts
index 62aeb4c45c4..4953578f428 100644
--- a/src/infra/device-identity.ts
+++ b/src/infra/device-identity.ts
@@ -1,5 +1,4 @@
 import crypto from "node:crypto";
-import fs from "node:fs";
 import path from "node:path";
 import { resolveStateDir } from "../config/paths.js";
 import { privateFileStoreSync } from "./private-file-store.js";
@@ -63,36 +62,35 @@ export function loadOrCreateDeviceIdentity(
   filePath: string = resolveDefaultIdentityPath(),
 ): DeviceIdentity {
   try {
-    if (fs.existsSync(filePath)) {
-      const raw = fs.readFileSync(filePath, "utf8");
-      const parsed = JSON.parse(raw) as StoredIdentity;
-      if (
-        parsed?.version === 1 &&
-        typeof parsed.deviceId === "string" &&
-        typeof parsed.publicKeyPem === "string" &&
-        typeof parsed.privateKeyPem === "string"
-      ) {
-        const derivedId = fingerprintPublicKey(parsed.publicKeyPem);
-        if (derivedId && derivedId !== parsed.deviceId) {
-          const updated: StoredIdentity = {
-            ...parsed,
-            deviceId: derivedId,
-          };
-          privateFileStoreSync(path.dirname(filePath)).writeJson(path.basename(filePath), updated, {
-            trailingNewline: true,
-          });
-          return {
-            deviceId: derivedId,
-            publicKeyPem: parsed.publicKeyPem,
-            privateKeyPem: parsed.privateKeyPem,
-          };
-        }
+    const parsed = privateFileStoreSync(path.dirname(filePath)).readJsonIfExists<StoredIdentity>(
+      path.basename(filePath),
+    );
+    if (
+      parsed?.version === 1 &&
+      typeof parsed.deviceId === "string" &&
+      typeof parsed.publicKeyPem === "string" &&
+      typeof parsed.privateKeyPem === "string"
+    ) {
+      const derivedId = fingerprintPublicKey(parsed.publicKeyPem);
+      if (derivedId && derivedId !== parsed.deviceId) {
+        const updated: StoredIdentity = {
+          ...parsed,
+          deviceId: derivedId,
+        };
+        privateFileStoreSync(path.dirname(filePath)).writeJson(path.basename(filePath), updated, {
+          trailingNewline: true,
+        });
         return {
-          deviceId: parsed.deviceId,
+          deviceId: derivedId,
           publicKeyPem: parsed.publicKeyPem,
           privateKeyPem: parsed.privateKeyPem,
         };
       }
+      return {
+        deviceId: parsed.deviceId,
+        publicKeyPem: parsed.publicKeyPem,
+        privateKeyPem: parsed.privateKeyPem,
+      };
     }
   } catch {
     // fall through to regenerate
@@ -116,13 +114,12 @@ export function loadDeviceIdentityIfPresent(
   filePath: string = resolveDefaultIdentityPath(),
 ): DeviceIdentity | null {
   try {
-    if (!fs.existsSync(filePath)) {
-      return null;
-    }
-    const raw = fs.readFileSync(filePath, "utf8");
-    const parsed = JSON.parse(raw) as StoredIdentity;
+    const parsed = privateFileStoreSync(path.dirname(filePath)).readJsonIfExists<StoredIdentity>(
+      path.basename(filePath),
+    );
     if (
-      parsed?.version !== 1 ||
+      !parsed ||
+      parsed.version !== 1 ||
       typeof parsed.deviceId !== "string" ||
       typeof parsed.publicKeyPem !== "string" ||
       typeof parsed.privateKeyPem !== "string"
diff --git a/src/infra/install-package-dir.ts b/src/infra/install-package-dir.ts
index e08b68f44e4..8e66efd4e6c 100644
--- a/src/infra/install-package-dir.ts
+++ b/src/infra/install-package-dir.ts
@@ -3,6 +3,7 @@ import path from "node:path";
 import { runCommandWithTimeout } from "../process/exec.js";
 import { pathExists } from "./fs-safe.js";
 import { assertCanonicalPathWithinBase } from "./install-safe-path.js";
+import { tryReadJson, writeJson } from "./json-files.js";
 import { createSafeNpmInstallArgs, createSafeNpmInstallEnv } from "./safe-package-install.js";
 
 const INSTALL_BASE_CHANGED_ERROR_MESSAGE = "install base directory changed during install";
@@ -25,23 +26,11 @@ function isObjectRecord(value: unknown): value is Record<string, unknown> {
 
 async function sanitizeManifestForNpmInstall(targetDir: string): Promise<void> {
   const manifestPath = path.join(targetDir, "package.json");
-  let manifestRaw = "";
-  try {
-    manifestRaw = await fs.readFile(manifestPath, "utf-8");
-  } catch {
-    return;
-  }
-
-  let manifest: Record<string, unknown>;
-  try {
-    const parsed = JSON.parse(manifestRaw) as unknown;
-    if (!isObjectRecord(parsed)) {
-      return;
-    }
-    manifest = parsed;
-  } catch {
+  const parsed = await tryReadJson<unknown>(manifestPath);
+  if (!isObjectRecord(parsed)) {
     return;
   }
+  const manifest = parsed;
 
   const devDependencies = manifest.devDependencies;
   if (!isObjectRecord(devDependencies)) {
@@ -61,7 +50,7 @@ async function sanitizeManifestForNpmInstall(targetDir: string): Promise<void> {
   } else {
     manifest.devDependencies = Object.fromEntries(filteredEntries);
   }
-  await fs.writeFile(manifestPath, `${JSON.stringify(manifest, null, 2)}\n`, "utf-8");
+  await writeJson(manifestPath, manifest, { trailingNewline: true });
 }
 
 async function hideProjectNpmConfigForInstall(targetDir: string): Promise<HiddenProjectConfigFile> {
diff --git a/src/infra/npm-managed-root.test.ts b/src/infra/npm-managed-root.test.ts
index f7a8278bdc6..4ab457ce921 100644
--- a/src/infra/npm-managed-root.test.ts
+++ b/src/infra/npm-managed-root.test.ts
@@ -61,6 +61,22 @@ describe("managed npm root", () => {
     });
   });
 
+  it("does not overwrite a present malformed package manifest", async () => {
+    const npmRoot = await makeTempRoot();
+    const manifestPath = path.join(npmRoot, "package.json");
+    await fs.writeFile(manifestPath, "{not-json", "utf8");
+
+    await expect(
+      upsertManagedNpmRootDependency({
+        npmRoot,
+        packageName: "@openclaw/feishu",
+        dependencySpec: "2026.5.2",
+      }),
+    ).rejects.toThrow();
+
+    await expect(fs.readFile(manifestPath, "utf8")).resolves.toBe("{not-json");
+  });
+
   it("pins managed dependencies to the resolved version", () => {
     expect(
       resolveManagedNpmRootDependencySpec({
diff --git a/src/infra/npm-managed-root.ts b/src/infra/npm-managed-root.ts
index 74adc2943e0..a700d7cc388 100644
--- a/src/infra/npm-managed-root.ts
+++ b/src/infra/npm-managed-root.ts
@@ -1,6 +1,7 @@
 import fs from "node:fs/promises";
 import path from "node:path";
 import type { NpmSpecResolution } from "./install-source-utils.js";
+import { readJson, readJsonIfExists, writeJson } from "./json-files.js";
 import type { ParsedRegistryNpmSpec } from "./npm-registry-spec.js";
 
 type ManagedNpmRootManifest = {
@@ -37,15 +38,8 @@ function readDependencyRecord(value: unknown): Record<string, string> {
 }
 
 async function readManagedNpmRootManifest(filePath: string): Promise<ManagedNpmRootManifest> {
-  try {
-    const parsed = JSON.parse(await fs.readFile(filePath, "utf8")) as unknown;
-    return isRecord(parsed) ? { ...parsed } : {};
-  } catch (err) {
-    if ((err as NodeJS.ErrnoException).code === "ENOENT") {
-      return {};
-    }
-    throw err;
-  }
+  const parsed = await readJsonIfExists<unknown>(filePath);
+  return isRecord(parsed) ? { ...parsed } : {};
 }
 
 export function resolveManagedNpmRootDependencySpec(params: {
@@ -72,7 +66,7 @@ export async function upsertManagedNpmRootDependency(params: {
       [params.packageName]: params.dependencySpec,
     },
   };
-  await fs.writeFile(manifestPath, `${JSON.stringify(next, null, 2)}\n`, "utf8");
+  await writeJson(manifestPath, next, { trailingNewline: true });
 }
 
 export async function readManagedNpmRootInstalledDependency(params: {
@@ -80,7 +74,7 @@ export async function readManagedNpmRootInstalledDependency(params: {
   packageName: string;
 }): Promise<ManagedNpmRootInstalledDependency | null> {
   const lockPath = path.join(params.npmRoot, "package-lock.json");
-  const parsed = JSON.parse(await fs.readFile(lockPath, "utf8")) as unknown;
+  const parsed = await readJson<unknown>(lockPath);
   if (!isRecord(parsed) || !isRecord(parsed.packages)) {
     return null;
   }
@@ -111,5 +105,5 @@ export async function removeManagedNpmRootDependency(params: {
     private: true,
     dependencies: nextDependencies,
   };
-  await fs.writeFile(manifestPath, `${JSON.stringify(next, null, 2)}\n`, "utf8");
+  await writeJson(manifestPath, next, { trailingNewline: true });
 }
diff --git a/src/infra/package-dist-inventory.ts b/src/infra/package-dist-inventory.ts
index 8d23c731e05..63ce53e423c 100644
--- a/src/infra/package-dist-inventory.ts
+++ b/src/infra/package-dist-inventory.ts
@@ -1,6 +1,7 @@
 import fs from "node:fs/promises";
 import path from "node:path";
 import { isLocalBuildMetadataDistPath } from "../../scripts/lib/local-build-metadata-paths.mjs";
+import { readJsonIfExists, writeJson } from "./json-files.js";
 
 export { LOCAL_BUILD_METADATA_DIST_PATHS } from "../../scripts/lib/local-build-metadata-paths.mjs";
 
@@ -117,15 +118,7 @@ async function collectExternalizedBundledExtensionIds(
   packageRoot: string,
 ): Promise<ExternalizedBundledExtensionIds> {
   const packageJsonPath = path.join(packageRoot, "package.json");
-  try {
-    const parsed = JSON.parse(await fs.readFile(packageJsonPath, "utf8")) as unknown;
-    return collectExcludedPackagedExtensionDirs(parsed);
-  } catch (error) {
-    if ((error as NodeJS.ErrnoException).code === "ENOENT") {
-      return new Set();
-    }
-    throw error;
-  }
+  return collectExcludedPackagedExtensionDirs(await readJsonIfExists<unknown>(packageJsonPath));
 }
 
 function isPackagedDistPath(
@@ -321,15 +314,16 @@ export async function writePackageDistInventory(packageRoot: string): Promise<st
     (left, right) => left.localeCompare(right),
   );
   const inventoryPath = path.join(packageRoot, PACKAGE_DIST_INVENTORY_RELATIVE_PATH);
-  await fs.mkdir(path.dirname(inventoryPath), { recursive: true });
-  await fs.writeFile(inventoryPath, `${JSON.stringify(inventory, null, 2)}\n`, "utf8");
+  await writeJson(inventoryPath, inventory, { trailingNewline: true });
   return inventory;
 }
 
-async function readPackageDistInventory(packageRoot: string): Promise<string[]> {
+async function readPackageDistInventoryOptional(packageRoot: string): Promise<string[] | null> {
   const inventoryPath = path.join(packageRoot, PACKAGE_DIST_INVENTORY_RELATIVE_PATH);
-  const raw = await fs.readFile(inventoryPath, "utf8");
-  const parsed = JSON.parse(raw) as unknown;
+  const parsed = await readJsonIfExists<unknown>(inventoryPath);
+  if (parsed === null) {
+    return null;
+  }
   if (!Array.isArray(parsed) || parsed.some((entry) => typeof entry !== "string")) {
     throw new Error(`Invalid package dist inventory at ${PACKAGE_DIST_INVENTORY_RELATIVE_PATH}`);
   }
@@ -341,14 +335,7 @@ async function readPackageDistInventory(packageRoot: string): Promise<string[]>
 export async function readPackageDistInventoryIfPresent(
   packageRoot: string,
 ): Promise<string[] | null> {
-  try {
-    return await readPackageDistInventory(packageRoot);
-  } catch (error) {
-    if ((error as NodeJS.ErrnoException).code === "ENOENT") {
-      return null;
-    }
-    throw error;
-  }
+  return await readPackageDistInventoryOptional(packageRoot);
 }
 
 export async function collectPackageDistInventoryErrors(packageRoot: string): Promise<string[]> {
diff --git a/src/infra/provider-usage.shared.ts b/src/infra/provider-usage.shared.ts
index 4f6ab8c09d0..de036643b2a 100644
--- a/src/infra/provider-usage.shared.ts
+++ b/src/infra/provider-usage.shared.ts
@@ -3,6 +3,7 @@ import os from "node:os";
 import path from "node:path";
 import { normalizeProviderId } from "../agents/provider-id.js";
 import { resolveRequiredHomeDir } from "./home-dir.js";
+import { tryReadJsonSync } from "./json-files.js";
 import type { UsageProviderId } from "./provider-usage.types.js";
 
 export const DEFAULT_TIMEOUT_MS = 5000;
@@ -84,12 +85,9 @@ export function resolveLegacyPiAgentAccessToken(
     if (!fs.existsSync(authPath)) {
       return undefined;
     }
-    const parsed = JSON.parse(fs.readFileSync(authPath, "utf8")) as Record<
-      string,
-      { access?: string }
-    >;
+    const parsed = tryReadJsonSync<Record<string, { access?: string }>>(authPath);
     for (const providerId of providerIds) {
-      const token = parsed[providerId]?.access;
+      const token = parsed?.[providerId]?.access;
       if (typeof token === "string" && token.trim()) {
         return token;
       }
diff --git a/src/plugins/bundled-plugin-metadata.ts b/src/plugins/bundled-plugin-metadata.ts
index a0dd55ed3ed..9cc4c625d9d 100644
--- a/src/plugins/bundled-plugin-metadata.ts
+++ b/src/plugins/bundled-plugin-metadata.ts
@@ -1,6 +1,7 @@
 import fs from "node:fs";
 import path from "node:path";
 import { fileURLToPath } from "node:url";
+import { tryReadJsonSync } from "../infra/json-files.js";
 import { collectBundledChannelConfigs } from "./bundled-channel-config-metadata.js";
 import {
   collectBundledPluginPublicSurfaceArtifacts,
@@ -51,14 +52,7 @@ export type BundledPluginMetadata = {
 
 function readPackageManifest(pluginDir: string): PackageManifest | undefined {
   const packagePath = path.join(pluginDir, "package.json");
-  if (!fs.existsSync(packagePath)) {
-    return undefined;
-  }
-  try {
-    return JSON.parse(fs.readFileSync(packagePath, "utf-8")) as PackageManifest;
-  } catch {
-    return undefined;
-  }
+  return tryReadJsonSync<PackageManifest>(packagePath) ?? undefined;
 }
 
 function resolveBundledPluginMetadataScanDir(
diff --git a/src/plugins/contracts/inventory/bundled-capability-metadata.ts b/src/plugins/contracts/inventory/bundled-capability-metadata.ts
index fb9f11c89f0..a9af84e833e 100644
--- a/src/plugins/contracts/inventory/bundled-capability-metadata.ts
+++ b/src/plugins/contracts/inventory/bundled-capability-metadata.ts
@@ -1,6 +1,7 @@
 import fs from "node:fs";
 import path from "node:path";
 import { fileURLToPath } from "node:url";
+import { tryReadJsonSync } from "../../../infra/json-files.js";
 import {
   normalizeBundledPluginStringList,
   resolveBundledPluginScanDir,
@@ -59,14 +60,10 @@ export type BundledCapabilityManifest = Pick<
 >;
 
 function readJsonRecord(filePath: string): Record<string, unknown> | undefined {
-  try {
-    const raw = JSON.parse(fs.readFileSync(filePath, "utf-8")) as unknown;
-    return raw && typeof raw === "object" && !Array.isArray(raw)
-      ? (raw as Record<string, unknown>)
-      : undefined;
-  } catch {
-    return undefined;
-  }
+  const raw = tryReadJsonSync(filePath);
+  return raw && typeof raw === "object" && !Array.isArray(raw)
+    ? (raw as Record<string, unknown>)
+    : undefined;
 }
 
 function readBundledCapabilityManifest(pluginDir: string): BundledCapabilityManifest | undefined {
diff --git a/src/plugins/discovery.ts b/src/plugins/discovery.ts
index 955eea09d93..ff434732da2 100644
--- a/src/plugins/discovery.ts
+++ b/src/plugins/discovery.ts
@@ -2,6 +2,7 @@ import fs from "node:fs";
 import path from "node:path";
 import type { PluginInstallRecord } from "../config/types.plugins.js";
 import { openRootFileSync } from "../infra/boundary-file-read.js";
+import { tryReadJsonSync } from "../infra/json-files.js";
 import {
   normalizeLowercaseStringOrEmpty,
   normalizeOptionalString,
@@ -436,11 +437,7 @@ function readPackageManifest(
 }
 
 function readTrustedPackageManifest(dir: string): PackageManifest | null {
-  try {
-    return JSON.parse(fs.readFileSync(path.join(dir, "package.json"), "utf8")) as PackageManifest;
-  } catch {
-    return null;
-  }
+  return tryReadJsonSync<PackageManifest>(path.join(dir, "package.json"));
 }
 
 function readCandidatePackageManifest(params: {
diff --git a/src/plugins/install-security-scan.runtime.ts b/src/plugins/install-security-scan.runtime.ts
index f831d26b36b..cd60bb60fa7 100644
--- a/src/plugins/install-security-scan.runtime.ts
+++ b/src/plugins/install-security-scan.runtime.ts
@@ -1,5 +1,6 @@
 import fs from "node:fs/promises";
 import path from "node:path";
+import { tryReadJson } from "../infra/json-files.js";
 import { resolveOpenClawPackageRootSync } from "../infra/openclaw-root.js";
 import { extensionUsesSkippedScannerPath, isPathInside } from "../security/scan-paths.js";
 import { scanDirectoryWithSummary } from "../security/skill-scanner.js";
@@ -496,10 +497,8 @@ async function scanManifestDependencyDenylist(params: {
   });
   const packageManifestPaths = traversalResult.packageManifestPaths;
   for (const manifestPath of packageManifestPaths) {
-    let manifest: PackageManifest;
-    try {
-      manifest = JSON.parse(await fs.readFile(manifestPath, "utf8")) as PackageManifest;
-    } catch {
+    const manifest = await tryReadJson<PackageManifest>(manifestPath);
+    if (!manifest) {
       continue;
     }
 
diff --git a/src/plugins/installed-plugin-index-record-reader.ts b/src/plugins/installed-plugin-index-record-reader.ts
index 2046c1599cd..8e87e999c3b 100644
--- a/src/plugins/installed-plugin-index-record-reader.ts
+++ b/src/plugins/installed-plugin-index-record-reader.ts
@@ -34,12 +34,8 @@ function readRecordMap(value: unknown): Record<string, PluginInstallRecord> | nu
 }
 
 function readJsonObjectFileSync(filePath: string): Record<string, unknown> | null {
-  try {
-    const parsed = JSON.parse(fs.readFileSync(filePath, "utf8")) as unknown;
-    return isRecord(parsed) ? parsed : null;
-  } catch {
-    return null;
-  }
+  const parsed = tryReadJsonSync(filePath);
+  return isRecord(parsed) ? parsed : null;
 }
 
 function readStringRecord(value: unknown): Record<string, string> {
diff --git a/src/plugins/loader.ts b/src/plugins/loader.ts
index cb2cd627783..3edcdf65cdc 100644
--- a/src/plugins/loader.ts
+++ b/src/plugins/loader.ts
@@ -10,6 +10,7 @@ import type { OpenClawConfig } from "../config/types.openclaw.js";
 import type { PluginInstallRecord } from "../config/types.plugins.js";
 import type { GatewayRequestHandler } from "../gateway/server-methods/types.js";
 import { openRootFileSync } from "../infra/boundary-file-read.js";
+import { tryReadJsonSync } from "../infra/json-files.js";
 import { createSubsystemLogger } from "../logging/subsystem.js";
 import {
   DEFAULT_MEMORY_DREAMING_PLUGIN_ID,
@@ -662,16 +663,12 @@ function resolveBundledPackageRootForCache(stockRoot?: string): string | undefin
 }
 
 function readPackageVersionForCache(packageJsonPath: string): string {
-  try {
-    const parsed = JSON.parse(fs.readFileSync(packageJsonPath, "utf8")) as unknown;
-    if (!parsed || typeof parsed !== "object" || Array.isArray(parsed)) {
-      return "unknown";
-    }
-    const version = (parsed as { version?: unknown }).version;
-    return typeof version === "string" && version.trim() ? version.trim() : "unknown";
-  } catch {
+  const parsed = tryReadJsonSync(packageJsonPath);
+  if (!parsed || typeof parsed !== "object" || Array.isArray(parsed)) {
     return "unknown";
   }
+  const version = (parsed as { version?: unknown }).version;
+  return typeof version === "string" && version.trim() ? version.trim() : "unknown";
 }
 
 const bundledPackageCacheIdentityByStockRoot = new Map<
diff --git a/src/plugins/manifest-registry-installed.ts b/src/plugins/manifest-registry-installed.ts
index 76ebc6b199a..d20b16c6254 100644
--- a/src/plugins/manifest-registry-installed.ts
+++ b/src/plugins/manifest-registry-installed.ts
@@ -1,6 +1,7 @@
 import fs from "node:fs";
 import path from "node:path";
 import type { OpenClawConfig } from "../config/types.openclaw.js";
+import { tryReadJsonSync } from "../infra/json-files.js";
 import type { PluginCandidate } from "./discovery.js";
 import { hashJson } from "./installed-plugin-index-hash.js";
 import type { InstalledPluginIndex, InstalledPluginIndexRecord } from "./installed-plugin-index.js";
@@ -129,8 +130,8 @@ function resolveInstalledPackageMetadata(record: InstalledPluginIndexRecord): {
   if (relative.startsWith("..") || path.isAbsolute(relative)) {
     return fallbackPackageManifest ? { packageManifest: fallbackPackageManifest } : {};
   }
-  try {
-    const packageJson = JSON.parse(fs.readFileSync(packageJsonPath, "utf8")) as PackageManifest;
+  const packageJson = tryReadJsonSync<PackageManifest>(packageJsonPath);
+  if (packageJson) {
     const packageManifest = getPackageManifestMetadata(packageJson);
     const dependencies = normalizePluginDependencySpecs({
       dependencies: packageJson.dependencies,
@@ -158,9 +159,8 @@ function resolveInstalledPackageMetadata(record: InstalledPluginIndexRecord): {
       packageDependencies: dependencies.dependencies,
       packageOptionalDependencies: dependencies.optionalDependencies,
     };
-  } catch {
-    return fallbackPackageManifest ? { packageManifest: fallbackPackageManifest } : {};
   }
+  return fallbackPackageManifest ? { packageManifest: fallbackPackageManifest } : {};
 }
 
 function toPluginCandidate(record: InstalledPluginIndexRecord): PluginCandidate {
diff --git a/src/plugins/marketplace.ts b/src/plugins/marketplace.ts
index fc4a25e564e..b9fa6a18773 100644
--- a/src/plugins/marketplace.ts
+++ b/src/plugins/marketplace.ts
@@ -5,6 +5,7 @@ import { resolveArchiveKind } from "../infra/archive.js";
 import { formatErrorMessage } from "../infra/errors.js";
 import { pathExists } from "../infra/fs-safe.js";
 import { resolveOsHomeRelativePath } from "../infra/home-dir.js";
+import { tryReadJson } from "../infra/json-files.js";
 import { fetchWithSsrFGuard } from "../infra/net/fetch-guard.js";
 import { isPathInside } from "../infra/path-guards.js";
 import { runCommandWithTimeout } from "../process/exec.js";
@@ -315,12 +316,7 @@ async function readClaudeKnownMarketplaces(): Promise<Record<string, KnownMarket
     return {};
   }
 
-  let parsed: unknown;
-  try {
-    parsed = JSON.parse(await fs.readFile(knownPath, "utf-8"));
-  } catch {
-    return {};
-  }
+  const parsed = await tryReadJson<unknown>(knownPath);
 
   if (!parsed || typeof parsed !== "object") {
     return {};
diff --git a/src/plugins/plugin-sdk-dist-alias.ts b/src/plugins/plugin-sdk-dist-alias.ts
index 58cddb1b31e..42c72bf9263 100644
--- a/src/plugins/plugin-sdk-dist-alias.ts
+++ b/src/plugins/plugin-sdk-dist-alias.ts
@@ -1,9 +1,9 @@
 import fs from "node:fs";
 import path from "node:path";
+import { writeJsonSync } from "../infra/json-files.js";
 
 function writeRuntimeJsonFile(targetPath: string, value: unknown): void {
-  fs.mkdirSync(path.dirname(targetPath), { recursive: true });
-  fs.writeFileSync(targetPath, `${JSON.stringify(value, null, 2)}\n`, "utf8");
+  writeJsonSync(targetPath, value);
 }
 
 function writeRuntimeModuleWrapper(sourcePath: string, targetPath: string): void {
diff --git a/src/plugins/runtime-sidecar-paths-baseline.ts b/src/plugins/runtime-sidecar-paths-baseline.ts
index 44cabe6f802..c49a9b6d6ca 100644
--- a/src/plugins/runtime-sidecar-paths-baseline.ts
+++ b/src/plugins/runtime-sidecar-paths-baseline.ts
@@ -1,5 +1,6 @@
 import fs from "node:fs";
 import path from "node:path";
+import { tryReadJsonSync } from "../infra/json-files.js";
 import { listBundledPluginMetadata } from "./bundled-plugin-metadata.js";
 
 const NON_PACKAGED_RUNTIME_SIDECAR_PLUGIN_DIRS = new Set(["qa-channel", "qa-lab", "qa-matrix"]);
@@ -13,10 +14,8 @@ function collectRootPackageExcludedRuntimeSidecarPluginDirs(rootDir: string): Se
   if (!fs.existsSync(packageJsonPath)) {
     return new Set();
   }
-  const packageJson = JSON.parse(fs.readFileSync(packageJsonPath, "utf8")) as {
-    files?: unknown;
-  };
-  if (!Array.isArray(packageJson.files)) {
+  const packageJson = tryReadJsonSync<{ files?: unknown }>(packageJsonPath);
+  if (!Array.isArray(packageJson?.files)) {
     return new Set();
   }
   const excluded = new Set<string>();
diff --git a/src/plugins/sdk-alias.ts b/src/plugins/sdk-alias.ts
index 94e11c47140..78a5ab75e3d 100644
--- a/src/plugins/sdk-alias.ts
+++ b/src/plugins/sdk-alias.ts
@@ -1,6 +1,7 @@
 import fs from "node:fs";
 import path from "node:path";
 import { fileURLToPath } from "node:url";
+import { tryReadJsonSync } from "../infra/json-files.js";
 import { resolveOpenClawPackageRootSync } from "../infra/openclaw-root.js";
 import { normalizeLowercaseStringOrEmpty } from "../shared/string-coerce.js";
 import { PluginLruCache } from "./plugin-cache-primitives.js";
@@ -37,15 +38,13 @@ function readPluginSdkPackageJson(packageRoot: string): PluginSdkPackageJson | n
   if (pluginSdkPackageJsonByRoot.has(cacheKey)) {
     return pluginSdkPackageJsonByRoot.get(cacheKey) ?? null;
   }
-  try {
-    const pkgRaw = fs.readFileSync(path.join(packageRoot, "package.json"), "utf-8");
-    const parsed = JSON.parse(pkgRaw) as PluginSdkPackageJson;
-    pluginSdkPackageJsonByRoot.set(cacheKey, parsed);
-    return parsed;
-  } catch {
+  const parsed = tryReadJsonSync<PluginSdkPackageJson>(path.join(packageRoot, "package.json"));
+  if (!parsed || typeof parsed !== "object" || Array.isArray(parsed)) {
     pluginSdkPackageJsonByRoot.set(cacheKey, null);
     return null;
   }
+  pluginSdkPackageJsonByRoot.set(cacheKey, parsed);
+  return parsed;
 }
 
 function isSafePluginSdkSubpathSegment(subpath: string): boolean {
@@ -306,29 +305,19 @@ function isUsableDistPluginSdkArtifact(candidate: string): boolean {
 }
 
 function readPrivateLocalOnlyPluginSdkSubpaths(packageRoot: string): string[] {
-  try {
-    const raw = fs.readFileSync(
-      path.join(packageRoot, "scripts", "lib", "plugin-sdk-private-local-only-subpaths.json"),
-      "utf-8",
-    );
-    const parsed = JSON.parse(raw);
-    if (!Array.isArray(parsed)) {
-      return [];
-    }
-    return parsed.filter((subpath): subpath is string => isSafePluginSdkSubpathSegment(subpath));
-  } catch {
+  const parsed = tryReadJsonSync(
+    path.join(packageRoot, "scripts", "lib", "plugin-sdk-private-local-only-subpaths.json"),
+  );
+  if (!Array.isArray(parsed)) {
     return [];
   }
+  return parsed.filter((subpath): subpath is string => isSafePluginSdkSubpathSegment(subpath));
 }
 
 function readBundledPluginPackageName(packageJsonPath: string): string | null {
-  try {
-    const parsed = JSON.parse(fs.readFileSync(packageJsonPath, "utf-8")) as { name?: unknown };
-    const name = typeof parsed.name === "string" ? parsed.name.trim() : "";
-    return name.startsWith("@openclaw/") ? name : null;
-  } catch {
-    return null;
-  }
+  const parsed = tryReadJsonSync<{ name?: unknown }>(packageJsonPath);
+  const name = typeof parsed?.name === "string" ? parsed.name.trim() : "";
+  return name.startsWith("@openclaw/") ? name : null;
 }
 
 function isBundledPluginPublicSurfaceSourceBasename(params: {
diff --git a/src/tts/status-config.ts b/src/tts/status-config.ts
index a3c79903f7f..14141b2fd6c 100644
--- a/src/tts/status-config.ts
+++ b/src/tts/status-config.ts
@@ -1,7 +1,7 @@
-import fs from "node:fs";
 import path from "node:path";
 import type { OpenClawConfig } from "../config/types.js";
 import type { TtsAutoMode, TtsConfig, TtsProvider } from "../config/types.tts.js";
+import { tryReadJsonSync } from "../infra/json-files.js";
 import {
   normalizeOptionalLowercaseString,
   normalizeOptionalString,
@@ -87,14 +87,7 @@ function resolveTtsPrefsPathValue(prefsPath: string | undefined): string {
 }
 
 function readPrefs(prefsPath: string): TtsUserPrefs {
-  try {
-    if (!fs.existsSync(prefsPath)) {
-      return {};
-    }
-    return JSON.parse(fs.readFileSync(prefsPath, "utf8")) as TtsUserPrefs;
-  } catch {
-    return {};
-  }
+  return tryReadJsonSync<TtsUserPrefs>(prefsPath) ?? {};
 }
 
 function resolveTtsAutoModeFromPrefs(prefs: TtsUserPrefs): TtsAutoMode | undefined {
diff --git a/src/utils/usage-format.ts b/src/utils/usage-format.ts
index b940cad1415..65b266037df 100644
--- a/src/utils/usage-format.ts
+++ b/src/utils/usage-format.ts
@@ -7,6 +7,7 @@ import type { ModelProviderConfig } from "../config/types.models.js";
 import type { OpenClawConfig } from "../config/types.openclaw.js";
 import { getGatewayModelPricingCacheFingerprint } from "../gateway/model-pricing-cache-state.js";
 import { getCachedGatewayModelPricing } from "../gateway/model-pricing-cache.js";
+import { tryReadJsonSync } from "../infra/json-files.js";
 import { normalizeOptionalString } from "../shared/string-coerce.js";
 
 /**
@@ -212,13 +213,13 @@ function loadModelsJsonCostIndex(options?: {
       modelsJsonCostCache.path !== modelsPath ||
       modelsJsonCostCache.mtimeMs !== stat.mtimeMs
     ) {
-      const parsed = JSON.parse(fs.readFileSync(modelsPath, "utf8")) as {
+      const parsed = tryReadJsonSync<{
         providers?: Record<string, ModelProviderConfig>;
-      };
+      }>(modelsPath);
       modelsJsonCostCache = {
         path: modelsPath,
         mtimeMs: stat.mtimeMs,
-        providers: parsed.providers,
+        providers: parsed?.providers,
         normalizedEntries: null,
         rawEntries: null,
       };