diff --git a/src/app/api/cli-tools/_lib/jsoncConfig.ts b/src/app/api/cli-tools/_lib/jsoncConfig.ts
new file mode 100644
index 0000000000..6141801737
--- /dev/null
+++ b/src/app/api/cli-tools/_lib/jsoncConfig.ts
@@ -0,0 +1,51 @@
+/**
+ * Shared JSONC-tolerant config reader for CLI-tools settings routes.
+ *
+ * Background: several upstream CLI tools (opencode, kilo, droid, cline, etc.)
+ * ship config files that are JSON with the occasional trailing comma or a
+ * stray comment — valid JSONC, but `JSON.parse()` rejects them with a
+ * `SyntaxError`. Until this helper, every `readSettings`/`readConfig` helper
+ * only caught `ENOENT` and re-threw, surfacing as a 500 that the dashboard
+ * misread as "tool not installed".
+ *
+ * Behaviour:
+ *  - strip trailing commas before parsing so JSONC files load cleanly;
+ *  - on ANY read or parse failure, return the caller-supplied fallback
+ *    (typically `null` or `{}`) instead of throwing, so the dashboard shows
+ *    "installed but not configured" rather than "not installed".
+ *
+ * Ported from upstream `decolua/9router@6c10edf8`. Co-authored-by: Zireael.
+ */
+import { promises as fs } from "node:fs";
+
+/**
+ * Parse a JSON/JSONC string, returning `null` on syntax errors instead of
+ * throwing. Trailing commas before `}` or `]` are stripped before parsing.
+ */
+export function parseJsoncOrNull<T = unknown>(content: string): T | null {
+  try {
+    const stripped = content.replace(/,(\s*[}\]])/g, "$1");
+    return JSON.parse(stripped) as T;
+  } catch {
+    return null;
+  }
+}
+
+/**
+ * Read a JSON/JSONC config file. Returns `fallback` (default: `null`) on any
+ * filesystem or parse error so callers can render an "installed but not
+ * configured" state instead of crashing with a 500.
+ */
+export async function readJsoncConfig<T = unknown>(
+  path: string,
+  fallback: T | null = null
+): Promise<T | null> {
+  let content: string;
+  try {
+    content = await fs.readFile(path, "utf-8");
+  } catch {
+    return fallback;
+  }
+  const parsed = parseJsoncOrNull<T>(content);
+  return parsed ?? fallback;
+}
diff --git a/src/app/api/cli-tools/claude-settings/route.ts b/src/app/api/cli-tools/claude-settings/route.ts
index ab11635644..1a3d735f3f 100644
--- a/src/app/api/cli-tools/claude-settings/route.ts
+++ b/src/app/api/cli-tools/claude-settings/route.ts
@@ -15,22 +15,18 @@ import { saveCliToolLastConfigured, deleteCliToolLastConfigured } from "@/lib/db
 import { cliSettingsEnvSchema } from "@/shared/validation/schemas";
 import { isValidationFailure, validateBody } from "@/shared/validation/helpers";
 import { getApiKeyById } from "@/lib/localDb";
+import { readJsoncConfig } from "../_lib/jsoncConfig";
 
 // Get claude settings path based on OS
 const getClaudeSettingsPath = () => getCliPrimaryConfigPath("claude");
 
-// Read current settings
+// Read current settings.
+// Ported from upstream decolua/9router@6c10edf8: tolerate JSONC (trailing
+// commas) and return null on any parse error so the dashboard renders
+// "installed but not configured" instead of a 500 misread as "not installed".
 const readSettings = async () => {
-  try {
-    const settingsPath = getClaudeSettingsPath();
-    const content = await fs.readFile(settingsPath, "utf-8");
-    return JSON.parse(content);
-  } catch (error: any) {
-    if (error.code === "ENOENT") {
-      return null;
-    }
-    throw error;
-  }
+  const settingsPath = getClaudeSettingsPath();
+  return readJsoncConfig(settingsPath);
 };
 
 // GET - Check claude CLI and read current settings
diff --git a/src/app/api/cli-tools/cline-settings/route.ts b/src/app/api/cli-tools/cline-settings/route.ts
index 090dcaf920..5b8dd37cd7 100644
--- a/src/app/api/cli-tools/cline-settings/route.ts
+++ b/src/app/api/cli-tools/cline-settings/route.ts
@@ -11,32 +11,20 @@ import { saveCliToolLastConfigured, deleteCliToolLastConfigured } from "@/lib/db
 import { cliModelConfigSchema } from "@/shared/validation/schemas";
 import { isValidationFailure, validateBody } from "@/shared/validation/helpers";
 import { resolveApiKey } from "@/shared/services/apiKeyResolver";
+import { readJsoncConfig } from "../_lib/jsoncConfig";
 
 const CLINE_DATA_DIR = path.join(os.homedir(), ".cline", "data");
 const GLOBAL_STATE_PATH = path.join(CLINE_DATA_DIR, "globalState.json");
 const SECRETS_PATH = path.join(CLINE_DATA_DIR, "secrets.json");
 
-// Read globalState.json
-const readGlobalState = async () => {
-  try {
-    const content = await fs.readFile(GLOBAL_STATE_PATH, "utf-8");
-    return JSON.parse(content);
-  } catch (error: any) {
-    if (error.code === "ENOENT") return null;
-    throw error;
-  }
-};
+// Read globalState.json.
+// Ported from upstream decolua/9router@6c10edf8: tolerate JSONC (trailing
+// commas) and return null on any parse error so the dashboard renders
+// "installed but not configured" instead of a 500 misread as "not installed".
+const readGlobalState = async () => readJsoncConfig(GLOBAL_STATE_PATH);
 
-// Read secrets.json
-const readSecrets = async () => {
-  try {
-    const content = await fs.readFile(SECRETS_PATH, "utf-8");
-    return JSON.parse(content);
-  } catch (error: any) {
-    if (error.code === "ENOENT") return {};
-    throw error;
-  }
-};
+// Read secrets.json (same JSONC-tolerant behaviour; defaults to {} for compat).
+const readSecrets = async () => readJsoncConfig<Record<string, unknown>>(SECRETS_PATH, {});
 
 // Check if OmniRoute is configured as OpenAI-compatible provider
 const hasOmniRouteConfig = (globalState: any) => {
diff --git a/src/app/api/cli-tools/droid-settings/route.ts b/src/app/api/cli-tools/droid-settings/route.ts
index c7e15f42a0..7313faef81 100644
--- a/src/app/api/cli-tools/droid-settings/route.ts
+++ b/src/app/api/cli-tools/droid-settings/route.ts
@@ -14,21 +14,16 @@ import { saveCliToolLastConfigured, deleteCliToolLastConfigured } from "@/lib/db
 import { cliModelConfigSchema } from "@/shared/validation/schemas";
 import { isValidationFailure, validateBody } from "@/shared/validation/helpers";
 import { resolveApiKey } from "@/shared/services/apiKeyResolver";
+import { readJsoncConfig } from "../_lib/jsoncConfig";
 
 const getDroidSettingsPath = () => getCliPrimaryConfigPath("droid");
 const getDroidDir = () => path.dirname(getDroidSettingsPath());
 
-// Read current settings.json
-const readSettings = async () => {
-  try {
-    const settingsPath = getDroidSettingsPath();
-    const content = await fs.readFile(settingsPath, "utf-8");
-    return JSON.parse(content);
-  } catch (error: any) {
-    if (error.code === "ENOENT") return null;
-    throw error;
-  }
-};
+// Read current settings.json.
+// Ported from upstream decolua/9router@6c10edf8: tolerate JSONC (trailing
+// commas) and return null on any parse error so the dashboard renders
+// "installed but not configured" instead of a 500 misread as "not installed".
+const readSettings = async () => readJsoncConfig(getDroidSettingsPath());
 
 // Check if settings has OmniRoute customModels
 const hasOmniRouteConfig = (settings: any) => {
diff --git a/src/app/api/cli-tools/kilo-settings/route.ts b/src/app/api/cli-tools/kilo-settings/route.ts
index aac82bebd7..965ac03bea 100644
--- a/src/app/api/cli-tools/kilo-settings/route.ts
+++ b/src/app/api/cli-tools/kilo-settings/route.ts
@@ -11,21 +11,17 @@ import { saveCliToolLastConfigured, deleteCliToolLastConfigured } from "@/lib/db
 import { cliModelConfigSchema } from "@/shared/validation/schemas";
 import { isValidationFailure, validateBody } from "@/shared/validation/helpers";
 import { resolveApiKey } from "@/shared/services/apiKeyResolver";
+import { readJsoncConfig } from "../_lib/jsoncConfig";
 
 const KILO_DATA_DIR = path.join(os.homedir(), ".local", "share", "kilo");
 const AUTH_PATH = path.join(KILO_DATA_DIR, "auth.json");
 const KILO_CONFIG_DIR = path.join(os.homedir(), ".config", "kilo");
 
-// Read auth.json
-const readAuth = async () => {
-  try {
-    const content = await fs.readFile(AUTH_PATH, "utf-8");
-    return JSON.parse(content);
-  } catch (error) {
-    if (error.code === "ENOENT") return null;
-    throw error;
-  }
-};
+// Read auth.json.
+// Ported from upstream decolua/9router@6c10edf8: tolerate JSONC (trailing
+// commas) and return null on any parse error so the dashboard renders
+// "installed but not configured" instead of a 500 misread as "not installed".
+const readAuth = async () => readJsoncConfig(AUTH_PATH);
 
 // Check if OmniRoute OpenAI-compatible provider is configured
 const hasOmniRouteConfig = (auth) => {
diff --git a/src/app/api/cli-tools/openclaw-settings/route.ts b/src/app/api/cli-tools/openclaw-settings/route.ts
index 3b6e37d0d4..19ca818804 100644
--- a/src/app/api/cli-tools/openclaw-settings/route.ts
+++ b/src/app/api/cli-tools/openclaw-settings/route.ts
@@ -14,21 +14,16 @@ import { saveCliToolLastConfigured, deleteCliToolLastConfigured } from "@/lib/db
 import { cliModelConfigSchema } from "@/shared/validation/schemas";
 import { isValidationFailure, validateBody } from "@/shared/validation/helpers";
 import { resolveApiKey } from "@/shared/services/apiKeyResolver";
+import { readJsoncConfig } from "../_lib/jsoncConfig";
 
 const getOpenClawSettingsPath = () => getCliPrimaryConfigPath("openclaw");
 const getOpenClawDir = () => path.dirname(getOpenClawSettingsPath());
 
-// Read current settings.json
-const readSettings = async () => {
-  try {
-    const settingsPath = getOpenClawSettingsPath();
-    const content = await fs.readFile(settingsPath, "utf-8");
-    return JSON.parse(content);
-  } catch (error: any) {
-    if (error.code === "ENOENT") return null;
-    throw error;
-  }
-};
+// Read current settings.json.
+// Ported from upstream decolua/9router@6c10edf8: tolerate JSONC (trailing
+// commas) and return null on any parse error so the dashboard renders
+// "installed but not configured" instead of a 500 misread as "not installed".
+const readSettings = async () => readJsoncConfig(getOpenClawSettingsPath());
 
 // Check if settings has OmniRoute config
 const hasOmniRouteConfig = (settings: any) => {
diff --git a/tests/unit/cli-tools-settings-jsonc.test.ts b/tests/unit/cli-tools-settings-jsonc.test.ts
new file mode 100644
index 0000000000..c259397ec4
--- /dev/null
+++ b/tests/unit/cli-tools-settings-jsonc.test.ts
@@ -0,0 +1,127 @@
+/**
+ * Regression test for the JSONC-tolerant config reader used by every
+ * cli-tools settings route.
+ *
+ * Ported from upstream `decolua/9router@6c10edf8`:
+ * "fix(cli-tools): tolerate JSONC configs in CLI tool settings routes".
+ *
+ * Before the fix, `readSettings`/`readConfig` helpers only caught `ENOENT` and
+ * re-threw on any other error — so a config file with a single trailing
+ * comma (valid JSONC, emitted by tools like opencode) crashed the GET route
+ * with a 500 and the dashboard misread the response as "tool not installed".
+ *
+ * After the fix:
+ *  - trailing commas are stripped before parsing (JSONC tolerated);
+ *  - any other parse error returns `null` (or the caller's fallback) so the
+ *    dashboard renders "installed but not configured".
+ */
+import test from "node:test";
+import assert from "node:assert/strict";
+import { promises as fs } from "node:fs";
+import os from "node:os";
+import path from "node:path";
+
+const { parseJsoncOrNull, readJsoncConfig } = await import(
+  "../../src/app/api/cli-tools/_lib/jsoncConfig.ts"
+);
+
+test("parseJsoncOrNull tolerates trailing commas in objects", () => {
+  const jsonc = `{
+    "model": "gpt-5",
+    "tools": ["a", "b",],
+    "nested": { "x": 1, },
+  }`;
+  const parsed = parseJsoncOrNull<{ model: string; tools: string[] }>(jsonc);
+  assert.ok(parsed, "parser must accept JSONC with trailing commas");
+  assert.equal(parsed.model, "gpt-5");
+  assert.deepEqual(parsed.tools, ["a", "b"]);
+});
+
+test("parseJsoncOrNull returns null on truly malformed JSON", () => {
+  assert.equal(parseJsoncOrNull("{ not json at all"), null);
+});
+
+test("readJsoncConfig returns fallback when file is missing", async () => {
+  const missing = path.join(os.tmpdir(), `cli-tools-jsonc-missing-${Date.now()}.json`);
+  assert.equal(await readJsoncConfig(missing), null);
+  assert.deepEqual(await readJsoncConfig(missing, {}), {});
+});
+
+test("readJsoncConfig parses a JSONC file with trailing commas (regression)", async () => {
+  const dir = await fs.mkdtemp(path.join(os.tmpdir(), "cli-tools-jsonc-"));
+  const file = path.join(dir, "settings.json");
+  await fs.writeFile(
+    file,
+    `{
+  "apiKey": "sk-test",
+  "model": "claude-sonnet-4-5",
+}
+`,
+    "utf-8"
+  );
+  try {
+    const parsed = await readJsoncConfig<{ apiKey: string; model: string }>(file);
+    assert.ok(parsed, "JSONC file with trailing comma must NOT crash the reader");
+    assert.equal(parsed.apiKey, "sk-test");
+    assert.equal(parsed.model, "claude-sonnet-4-5");
+  } finally {
+    await fs.rm(dir, { recursive: true, force: true });
+  }
+});
+
+test("readJsoncConfig returns fallback on corrupted config instead of throwing", async () => {
+  const dir = await fs.mkdtemp(path.join(os.tmpdir(), "cli-tools-jsonc-bad-"));
+  const file = path.join(dir, "settings.json");
+  await fs.writeFile(file, "{ this is not valid json at all !!! ", "utf-8");
+  try {
+    // Must NOT throw — the dashboard renders "installed but not configured"
+    // when this returns null, instead of "not installed" on a 500.
+    assert.equal(await readJsoncConfig(file), null);
+    assert.deepEqual(await readJsoncConfig(file, {}), {});
+  } finally {
+    await fs.rm(dir, { recursive: true, force: true });
+  }
+});
+
+/**
+ * Source-guard: every cli-tools settings route's read helper must go through
+ * the JSONC-tolerant reader. A regression to raw `JSON.parse(content)` inside
+ * a `readSettings` / `readConfig` helper would re-introduce the original
+ * 500-on-JSONC bug, so we assert the routes do not contain that pattern.
+ *
+ * Same source-guard pattern as `tests/unit/source-guard-*.test.ts`.
+ */
+test("cli-tools settings routes use the JSONC-tolerant reader (source-guard)", async () => {
+  // For each route, look for the GET-read helper region (top of file, up to
+  // the first `export async function GET`) and assert it imports + uses the
+  // JSONC-tolerant reader instead of raw `JSON.parse(content)`.
+  const routes = [
+    "claude-settings",
+    "cline-settings",
+    "droid-settings",
+    "kilo-settings",
+    "openclaw-settings",
+  ];
+  const repoRoot = path.resolve(import.meta.dirname ?? ".", "..", "..");
+  for (const r of routes) {
+    const src = await fs.readFile(
+      path.join(repoRoot, "src", "app", "api", "cli-tools", r, "route.ts"),
+      "utf-8"
+    );
+    const getIdx = src.indexOf("export async function GET");
+    assert.ok(getIdx > 0, `${r}: expected an exported GET handler`);
+    const head = src.slice(0, getIdx);
+    assert.ok(
+      /from\s+["']\.\.\/_lib\/jsoncConfig["']/.test(src),
+      `${r}: must import readJsoncConfig from ../_lib/jsoncConfig`
+    );
+    assert.ok(
+      !/JSON\.parse\(\s*content\s*\)/.test(head),
+      `${r}: read helper still calls raw JSON.parse(content) — port the JSONC fix`
+    );
+    assert.ok(
+      /readJsoncConfig\s*[<(]/.test(head),
+      `${r}: read helper must invoke readJsoncConfig`
+    );
+  }
+});