fix(cli): persist DNS config in JSON mode

packages/cli/src/commands/scale.test.ts

@@ -1,5 +1,6 @@
 import { describe, it, expect, afterEach } from 'vitest';
-import { mkdtempSync, writeFileSync, rmSync, existsSync, readFileSync } from 'node:fs';
+import { mkdtempSync, writeFileSync, rmSync, existsSync, readFileSync, mkdirSync } from 'node:fs';
+import { spawnSync } from 'node:child_process';
 import { join } from 'node:path';
 import { tmpdir } from 'node:os';
 import {
@@ -414,6 +415,55 @@ describe('auto-scale rules', () => {
   });
 });
 
+describe('DNS JSON mode', () => {
+  it('persists DNS config when --json is used without --dry-run', () => {
+    const dir = makeTempDir();
+    const stateDir = join(dir, '.sh1pt');
+    mkdirSync(stateDir, { recursive: true });
+    const statePath = join(stateDir, 'credentials.json');
+    writeFileSync(statePath, JSON.stringify({
+      apiKey: 'preserve-me',
+      instances: [
+        {
+          id: 'inst-0001',
+          provider: 'aws',
+          status: 'running',
+          publicIp: '203.0.113.10',
+          createdAt: '',
+          hourlyRate: 0.1,
+        },
+      ],
+      lastUpdated: '',
+    }));
+
+    const scaleModule = new URL('./scale.ts', import.meta.url).href;
+    const runDns = [
+      `import { scaleCmd } from ${JSON.stringify(scaleModule)};`,
+      `await scaleCmd.parseAsync(['node', 'sh1pt', 'dns', '--provider', 'dns-cloudflare', '--domain', 'api.example.com', '--json']);`,
+    ].join('\n');
+    const result = spawnSync(
+      process.execPath,
+      ['--import', 'tsx', '--input-type=module', '--eval', runDns],
+      {
+        env: { ...process.env, HOME: dir, USERPROFILE: dir },
+        encoding: 'utf8',
+      },
+    );
+
+    expect(result.status, result.stderr).toBe(0);
+    const output = JSON.parse(result.stdout);
+    expect(output.recordCount).toBe(1);
+
+    const saved = JSON.parse(readFileSync(statePath, 'utf-8'));
+    expect(saved.apiKey).toBe('preserve-me');
+    expect(saved.dns).toMatchObject({
+      domain: 'api.example.com',
+      provider: 'dns-cloudflare',
+      ips: ['203.0.113.10'],
+    });
+  });
+});
+
 // ---------------------------------------------------------------------------
 // rollbackPlanIps — rollback plan must list the OLD fleet, not the new one
 // ---------------------------------------------------------------------------

packages/cli/src/commands/scale.ts

@@ -643,30 +643,31 @@ scaleCmd
       records,
     };
 
-    if (opts.json) {
-      console.log(JSON.stringify(summary, null, 2));
-      return;
-    }
+    if (!opts.json) {
+      console.log(kleur.bold('\n🌐 DNS Round-Robin Plan'));
+      console.log(kleur.dim('─'.repeat(56)));
+      console.log(`${kleur.cyan('Domain:'.padEnd(20))} ${opts.domain}`);
+      console.log(`${kleur.cyan('DNS Provider:'.padEnd(20))} ${opts.provider}`);
+      console.log(`${kleur.cyan('TTL:'.padEnd(20))} ${opts.ttl}s`);
+      if (opts.proxied) {
+        console.log(`${kleur.cyan('Proxied:'.padEnd(20))} ${kleur.yellow('yes (Cloudflare edge)')}`);
+      }
+      console.log(`${kleur.cyan('Records:'.padEnd(20))} ${records.length} A record(s)`);
+      console.log(kleur.dim('─'.repeat(56)));
 
-    console.log(kleur.bold('\n🌐 DNS Round-Robin Plan'));
-    console.log(kleur.dim('─'.repeat(56)));
-    console.log(`${kleur.cyan('Domain:'.padEnd(20))} ${opts.domain}`);
-    console.log(`${kleur.cyan('DNS Provider:'.padEnd(20))} ${opts.provider}`);
-    console.log(`${kleur.cyan('TTL:'.padEnd(20))} ${opts.ttl}s`);
-    if (opts.proxied) {
-      console.log(`${kleur.cyan('Proxied:'.padEnd(20))} ${kleur.yellow('yes (Cloudflare edge)')}`);
-    }
-    console.log(`${kleur.cyan('Records:'.padEnd(20))} ${records.length} A record(s)`);
-    console.log(kleur.dim('─'.repeat(56)));
+      for (const rec of records) {
+        console.log(`  ${kleur.green('A')}   ${rec.name.padEnd(30)} → ${rec.value}  ${kleur.dim(`(inst: ${rec.instanceId}, ${rec.provider})`)}`);
+      }
 
-    for (const rec of records) {
-      console.log(`  ${kleur.green('A')}   ${rec.name.padEnd(30)} → ${rec.value}  ${kleur.dim(`(inst: ${rec.instanceId}, ${rec.provider})`)}`);
+      console.log(kleur.dim('─'.repeat(56)));
     }
 
-    console.log(kleur.dim('─'.repeat(56)));
-
     if (opts.dryRun) {
-      console.log(kleur.dim('Dry-run — no DNS changes made.'));
+      if (opts.json) {
+        console.log(JSON.stringify(summary, null, 2));
+      } else {
+        console.log(kleur.dim('Dry-run — no DNS changes made.'));
+      }
       return;
     }
 
@@ -692,6 +693,11 @@ scaleCmd
     if (!existsSync(dir)) mkdirSync(dir, { recursive: true });
     writeFileSync(credsPath, JSON.stringify(creds, null, 2));
 
+    if (opts.json) {
+      console.log(JSON.stringify(summary, null, 2));
+      return;
+    }
+
     console.log(kleur.green(`✅ DNS round-robin configured for ${opts.domain} with ${records.length} A record(s).`));
     console.log(kleur.dim(`DNS provider: ${opts.provider}`));
     console.log(kleur.dim(`Next step: verify DNS propagation with \`dig ${opts.domain}\``));