fix(cli): treat highlighted install target as selected

Signed-off-by: SenLinLeo <1664761477@qq.com>

cli/src/agents/resolver.ts

@@ -160,6 +160,7 @@ function dedupeByRoot(candidates: AgentCandidate[]): AgentCandidate[] {
 
 async function selectTargetsInteractively(candidates: AgentCandidate[]): Promise<AgentCandidate[]> {
   const prompts = await import('prompts')
+  let highlightedIndex = 0
   const { selected } = await prompts.default({
     type: 'multiselect',
     name: 'selected',
@@ -167,7 +168,13 @@ async function selectTargetsInteractively(candidates: AgentCandidate[]): Promise
     choices: candidates.map(c => ({
       title: `${c.agent} (${c.rootDir})`,
       value: c
-    }))
+    })),
+    onRender: function (this: { cursor?: number }) {
+      highlightedIndex = this.cursor ?? highlightedIndex
+    },
+    format: (selectedTargets: AgentCandidate[]) => (
+      selectedTargets.length > 0 ? selectedTargets : [candidates[highlightedIndex] ?? candidates[0]!]
+    )
   })
   if (!selected || selected.length === 0) {
     throw new CliError('installation cancelled', EXIT.usage)

cli/test/unit/agents/resolver-interactive.test.ts

@@ -0,0 +1,36 @@
+import { describe, expect, mock, test } from 'bun:test'
+import type { AgentCandidate } from '../../../src/agents/types'
+
+interface PromptOptions {
+  onRender?: (this: { cursor?: number }) => void
+  format?: (selectedTargets: AgentCandidate[]) => AgentCandidate[]
+}
+
+mock.module('prompts', () => ({
+  default: (options: PromptOptions) => {
+    options.onRender?.call({ cursor: 1 })
+    return { selected: options.format?.([]) ?? [] }
+  }
+}))
+
+const { resolveInstallTargets } = await import('../../../src/agents/resolver')
+
+describe('resolveInstallTargets interactive prompt', () => {
+  test('uses the highlighted target when Enter submits an empty multiselect', async () => {
+    const detected: AgentCandidate[] = [
+      { agent: 'codex', rootDir: '/repo/.codex/skills', scope: 'project', source: 'detected' },
+      { agent: 'claude-code', rootDir: '/repo/.claude/skills', scope: 'project', source: 'detected' }
+    ]
+    const highlighted = detected[1]!
+
+    const targets = await resolveInstallTargets({
+      cwd: '/repo',
+      agents: [],
+      json: false,
+      interactive: true,
+      detected
+    })
+
+    expect(targets).toEqual([highlighted])
+  })
+})