feat(web): add plan mode controls

packages/client/ui-plan/tests/node-plugin.spec.ts

@@ -0,0 +1,39 @@
+import { Context } from 'cordis'
+import { afterEach, describe, expect, it } from 'vitest'
+import ToolRegistry from '@deepseek-ai/dsh-tools'
+import SystemPrompt from '@deepseek-ai/dsh-system-prompt'
+import UserInteractionService from '@deepseek-ai/dsh-user-interaction'
+import { EXIT_PLAN_MODE } from '@deepseek-ai/dsh-plan-mode'
+import { WEB_PLAN_SECTION, apply, inject } from '../src/index.ts'
+
+let ctx: Context | undefined
+
+afterEach(async () => {
+  await ctx?.fiber.dispose()
+  ctx = undefined
+})
+
+describe('ui-plan node plugin', () => {
+  it('mounts the Web policy and stable exit tool for the selected feature lifecycle', async () => {
+    ctx = new Context()
+    await ctx.plugin(SystemPrompt)
+    await ctx.plugin(ToolRegistry)
+    await ctx.plugin(UserInteractionService)
+    const feature = ctx.plugin({ inject: [...inject], apply })
+    await feature.await()
+
+    expect(ctx.get('planMode')).toBeDefined()
+    expect(ctx.tools.get(EXIT_PLAN_MODE)).toBeDefined()
+    expect(WEB_PLAN_SECTION).toContain('Stay in plan mode until exit_plan_mode succeeds')
+    expect(WEB_PLAN_SECTION).toContain('Do not edit or write files')
+    expect(WEB_PLAN_SECTION).toContain('Make exit_plan_mode the only and final tool call')
+    expect((await ctx.systemPrompt.assemble()).sections)
+      .toEqual(expect.arrayContaining([expect.objectContaining({ name: 'plan:policy', text: '' })]))
+
+    await feature.dispose()
+    expect(ctx.get('planMode')).toBeUndefined()
+    expect(ctx.tools.get(EXIT_PLAN_MODE)).toBeUndefined()
+    expect((await ctx.systemPrompt.assemble()).sections.map(section => section.name))
+      .not.toContain('plan:policy')
+  })
+})