diff --git a/src/services/jsonc.test.ts b/src/services/jsonc.test.ts
new file mode 100644
index 0000000..15e62f4
--- /dev/null
+++ b/src/services/jsonc.test.ts
@@ -0,0 +1,58 @@
+import { describe, expect, test } from "bun:test";
+import { execFileSync } from "node:child_process";
+import { mkdtempSync, mkdirSync, rmSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { stripJsoncComments } from "./jsonc.js";
+
+describe("JSONC configuration strings", () => {
+  test("preserves comma-delimiter sequences inside strings while removing trailing commas", () => {
+    const value = 'Keep ,} and , ] literally, including escaped "quotes", \\ paths and https://example.com';
+    const input = `{
+      // A comma before a comment is still a trailing comma.
+      "values": [${JSON.stringify(value)}, /* comment */ ],
+      "nested": {"value": ${JSON.stringify(value)},},
+    }`;
+    expect(JSON.parse(stripJsoncComments(input))).toEqual({
+      values: [value],
+      nested: { value },
+    });
+  });
+
+  test("leaves unterminated escaped-quote strings invalid", () => {
+    const input = '{"filterPrompt":"' + '\\"'.repeat(50_000) + ',}';
+    expect(stripJsoncComments(input)).toBe(input);
+    expect(() => JSON.parse(stripJsoncComments(input))).toThrow();
+  });
+
+  for (const filename of ["supermemory.jsonc", "supermemory.json"]) {
+    test(`loads memory prompts unchanged from ${filename}`, () => {
+      const home = mkdtempSync(join(tmpdir(), "supermemory-jsonc-"));
+      try {
+        const directory = join(home, ".config", "opencode");
+        mkdirSync(directory, { recursive: true });
+        const filterPrompt = 'Preserve JSON examples containing ",}" or ",]" in memories.';
+        const recallDirective = 'Search for the literal syntax , } and , ] without changing punctuation.';
+        const values = { filterPrompt, recallDirective };
+        const json = JSON.stringify(values, null, 2);
+        const content = filename.endsWith(".jsonc")
+          ? `// memory extraction instructions\n${json.slice(0, -1).trimEnd()},\n}\n`
+          : json;
+        writeFileSync(join(directory, filename), content);
+        // Import the production configuration in a fresh process: CONFIG is
+        // initialized at module load, and must read this isolated home only.
+        const configUrl = new URL("../config.ts", import.meta.url).href;
+        const output = execFileSync(process.execPath, [
+          "--eval",
+          `import { CONFIG } from ${JSON.stringify(configUrl)}; console.log(JSON.stringify({ filterPrompt: CONFIG.filterPrompt, recallDirective: CONFIG.recallDirective }));`,
+        ], {
+          encoding: "utf8",
+          env: { ...process.env, HOME: home, USERPROFILE: home },
+        });
+        expect(JSON.parse(output)).toEqual(values);
+      } finally {
+        rmSync(home, { recursive: true, force: true });
+      }
+    });
+  }
+});
diff --git a/src/services/jsonc.ts b/src/services/jsonc.ts
index 7959907..e46686c 100644
--- a/src/services/jsonc.ts
+++ b/src/services/jsonc.ts
@@ -80,6 +80,8 @@ export function stripJsoncComments(content: string): string {
     i++;
   }
 
-  // Remove trailing commas before } or ]
-  return result.replace(/,\s*([}\]])/g, "$1");
+  // Consume string spans first; JSON.parse still rejects unterminated strings.
+  return result.replace(/"(?:\\.|[^"\\])*"?|,\s*([}\]])/g, (match, closing: string | undefined) =>
+    closing ?? match,
+  );
 }