feat: Add intelligent auto-router and enhanced integrations

- Add intelligent-router.sh hook for automatic agent routing
- Add AUTO-TRIGGER-SUMMARY.md documentation
- Add FINAL-INTEGRATION-SUMMARY.md documentation
- Complete Prometheus integration (6 commands + 4 tools)
- Complete Dexto integration (12 commands + 5 tools)
- Enhanced Ralph with access to all agents
- Fix /clawd command (removed disable-model-invocation)
- Update hooks.json to v5 with intelligent routing
- 291 total skills now available
- All 21 commands with automatic routing

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

dexto/packages/core/src/utils/safe-stringify.ts

@@ -0,0 +1,45 @@
+import { redactSensitiveData } from './redactor.js';
+
+/**
+ * Safe stringify that handles circular references and BigInt.
+ * Also redacts sensitive data to prevent PII leaks.
+ *
+ * @param value - Value to stringify
+ * @param maxLen - Optional maximum length. If provided, truncates with '…(truncated)' suffix.
+ */
+export function safeStringify(value: unknown, maxLen?: number): string {
+    try {
+        // Handle top-level BigInt without triggering JSON.stringify errors
+        if (typeof value === 'bigint') {
+            return value.toString();
+        }
+        // First redact sensitive data to prevent PII leaks
+        const redacted = redactSensitiveData(value);
+        const str = JSON.stringify(redacted, (_, v) => {
+            if (v instanceof Error) {
+                return { name: v.name, message: v.message, stack: v.stack };
+            }
+            if (typeof v === 'bigint') return v.toString();
+            return v;
+        });
+        if (typeof str === 'string') {
+            // Only truncate if maxLen is explicitly provided
+            if (maxLen !== undefined && maxLen > 0 && str.length > maxLen) {
+                const indicator = '…(truncated)';
+                if (maxLen <= indicator.length) {
+                    return str.slice(0, maxLen);
+                }
+                const sliceLen = maxLen - indicator.length;
+                return `${str.slice(0, sliceLen)}${indicator}`;
+            }
+            return str;
+        }
+        return String(value);
+    } catch {
+        try {
+            return String(value);
+        } catch {
+            return '[Unserializable value]';
+        }
+    }
+}