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src/utils/safeParseAI.js

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+const FALLBACK = {
+  identity_title: 'A Better Version of Me',
+  identity_summary: 'You are starting a journey to transform yourself, step by step. Every small action counts.',
+  suggested_habits: [
+    'Do one small positive action today',
+    'Avoid one bad habit',
+    'Reflect for 2 minutes before sleep',
+  ],
+};
+
+/**
+ * Safely parse AI JSON response.
+ * Handles markdown wrapping, broken JSON, and missing fields.
+ * Always returns a valid result — never throws.
+ *
+ * @param {string} raw - Raw text from AI response
+ * @returns {{ identity_title: string, identity_summary: string, suggested_habits: string[] }}
+ */
+export default function safeParseAI(raw) {
+  if (!raw || typeof raw !== 'string') return { ...FALLBACK };
+
+  try {
+    // Strip markdown code fences
+    let cleaned = raw.trim();
+    cleaned = cleaned.replace(/```json\s*/gi, '').replace(/```\s*/gi, '');
+    cleaned = cleaned.trim();
+
+    // Find first { and last } to extract JSON object
+    const start = cleaned.indexOf('{');
+    const end = cleaned.lastIndexOf('}');
+    if (start === -1 || end === -1) return { ...FALLBACK };
+
+    cleaned = cleaned.slice(start, end + 1);
+    const parsed = JSON.parse(cleaned);
+
+    // Validate required fields
+    const title = typeof parsed.identity_title === 'string' && parsed.identity_title.trim()
+      ? parsed.identity_title.trim()
+      : FALLBACK.identity_title;
+
+    const summary = typeof parsed.identity_summary === 'string' && parsed.identity_summary.trim()
+      ? parsed.identity_summary.trim()
+      : FALLBACK.identity_summary;
+
+    let habits = FALLBACK.suggested_habits;
+    if (Array.isArray(parsed.suggested_habits) && parsed.suggested_habits.length > 0) {
+      habits = parsed.suggested_habits
+        .filter((h) => typeof h === 'string' && h.trim())
+        .map((h) => h.trim());
+    }
+
+    if (habits.length === 0) habits = FALLBACK.suggested_habits;
+
+    return {
+      identity_title: title,
+      identity_summary: summary,
+      suggested_habits: habits,
+    };
+  } catch (_) {
+    return { ...FALLBACK };
+  }
+}
+
+export { FALLBACK };