feat: 添加 builtin-tools 增强与测试覆盖

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/builtin-tools/src/tools/CtxInspectTool/CtxInspectTool.ts

@@ -2,6 +2,12 @@ import { z } from 'zod/v4'
 import type { ToolResultBlockParam } from 'src/Tool.js'
 import { buildTool } from 'src/Tool.js'
 import { lazySchema } from 'src/utils/lazySchema.js'
+import { tokenCountWithEstimation } from 'src/utils/tokens.js'
+import {
+  getStats,
+  isContextCollapseEnabled,
+} from 'src/services/contextCollapse/index.js'
+import { isSessionMemoryInitialized } from 'src/services/SessionMemory/sessionMemoryUtils.js'
 
 const CTX_INSPECT_TOOL_NAME = 'CtxInspect'
 
@@ -19,6 +25,10 @@ type CtxInput = z.infer<InputSchema>
 type CtxOutput = {
   total_tokens: number
   message_count: number
+  context_window_model: string
+  prompt_caching_enabled: boolean
+  session_memory_enabled: boolean
+  context_collapse_enabled: boolean
   summary: string
 }
 
@@ -67,13 +77,45 @@ Use this to understand your context budget before deciding whether to snip old m
     }
   },
 
-  async call() {
-    // Context inspection is wired into the context collapse system.
+  async call(input: CtxInput, context) {
+    const messages = context.messages ?? []
+    const model = context.options?.mainLoopModel ?? 'unknown'
+    const totalTokens = tokenCountWithEstimation(messages)
+    const collapseEnabled = isContextCollapseEnabled()
+    const collapseStats = getStats()
+    const focused = input.query?.trim()
+
+    const sessionMemoryEnabled = isSessionMemoryInitialized()
+    // Prompt caching is an API-level feature controlled by the provider, not
+    // a user-facing toggle. Report as enabled only for providers known to
+    // support Anthropic-style prompt caching (first-party, Bedrock, Vertex).
+    const promptCachingEnabled = !model.startsWith('openai/') &&
+      !model.startsWith('grok/') &&
+      !model.startsWith('gemini/')
+
+    const summaryParts = [
+      focused ? `Focus: ${focused}` : 'Overall context summary',
+      `Model context: ${model}`,
+      `Prompt caching: ${promptCachingEnabled ? 'enabled' : 'disabled'}`,
+      `Session memory: ${sessionMemoryEnabled ? 'enabled' : 'disabled'}`,
+      `Context collapse: ${collapseEnabled ? 'enabled' : 'disabled'}`,
+    ]
+
+    if (collapseEnabled) {
+      summaryParts.push(
+        `Collapse spans: ${collapseStats.collapsedSpans} committed, ${collapseStats.stagedSpans} staged, ${collapseStats.collapsedMessages} messages summarized`,
+      )
+    }
+
     return {
       data: {
-        total_tokens: 0,
-        message_count: 0,
-        summary: 'Context inspection requires the CONTEXT_COLLAPSE runtime.',
+        total_tokens: totalTokens,
+        message_count: messages.length,
+        context_window_model: model,
+        prompt_caching_enabled: promptCachingEnabled,
+        session_memory_enabled: sessionMemoryEnabled,
+        context_collapse_enabled: collapseEnabled,
+        summary: summaryParts.join('\n'),
       },
     }
   },

packages/builtin-tools/src/tools/CtxInspectTool/__tests__/CtxInspectTool.test.ts

@@ -0,0 +1,216 @@
+import { afterEach, beforeEach, describe, expect, mock, test } from 'bun:test'
+
+mock.module('src/utils/log.ts', () => ({
+  logError: () => {},
+  logToFile: () => {},
+  getLogDisplayTitle: () => '',
+  logEvent: () => {},
+  logMCPError: () => {},
+  logMCPDebug: () => {},
+  dateToFilename: (d: Date) => d.toISOString().replace(/[:.]/g, '-'),
+  getLogFilePath: () => '/tmp/mock-log',
+  attachErrorLogSink: () => {},
+  getInMemoryErrors: () => [],
+  loadErrorLogs: async () => [],
+  getErrorLogByIndex: async () => null,
+  captureAPIRequest: () => {},
+  _resetErrorLogForTesting: () => {},
+}))
+
+mock.module('src/services/tokenEstimation.ts', () => ({
+  roughTokenCountEstimation: (text: string) => Math.ceil(text.length / 4),
+  roughTokenCountEstimationForMessages: (msgs: unknown[]) => msgs.length * 64,
+  roughTokenCountEstimationForMessage: () => 64,
+  roughTokenCountEstimationForFileType: () => 64,
+  bytesPerTokenForFileType: () => 4,
+  countTokensWithAPI: async () => 0,
+  countMessagesTokensWithAPI: async () => 0,
+  countTokensViaHaikuFallback: async () => 0,
+}))
+
+let sessionMemoryInitialized = false
+mock.module('src/services/SessionMemory/sessionMemoryUtils.ts', () => ({
+  isSessionMemoryInitialized: () => sessionMemoryInitialized,
+  waitForSessionMemoryExtraction: async () => {},
+  getLastSummarizedMessageId: () => undefined,
+  getSessionMemoryContent: async () => null,
+  setLastSummarizedMessageId: () => {},
+  markExtractionStarted: () => {},
+  markExtractionCompleted: () => {},
+  setSessionMemoryConfig: () => {},
+  getSessionMemoryConfig: () => ({}),
+  recordExtractionTokenCount: () => {},
+  markSessionMemoryInitialized: () => {},
+  hasMetInitializationThreshold: () => false,
+  hasMetUpdateThreshold: () => false,
+  getToolCallsBetweenUpdates: () => 0,
+  resetSessionMemoryState: () => {},
+  DEFAULT_SESSION_MEMORY_CONFIG: {},
+}))
+
+mock.module('src/utils/slowOperations.ts', () => ({
+  jsonStringify: JSON.stringify,
+  jsonParse: JSON.parse,
+  slowLogging: { enabled: false },
+  clone: (value: unknown) => structuredClone(value),
+  cloneDeep: (value: unknown) => structuredClone(value),
+  callerFrame: () => '',
+  SLOW_OPERATION_THRESHOLD_MS: 100,
+  writeFileSync_DEPRECATED: () => {},
+}))
+
+const { initContextCollapse, resetContextCollapse } = await import(
+  'src/services/contextCollapse/index.js'
+)
+const { tokenCountWithEstimation } = await import('src/utils/tokens.js')
+const { CtxInspectTool } = await import('../CtxInspectTool.js')
+
+function makeUserMessage(text: string) {
+  return {
+    type: 'user' as const,
+    uuid: `user-${text}`,
+    message: { role: 'user' as const, content: text },
+  }
+}
+
+function makeAssistantMessage(text: string) {
+  return {
+    type: 'assistant' as const,
+    uuid: `assistant-${text}`,
+    message: {
+      role: 'assistant' as const,
+      content: [{ type: 'text' as const, text }],
+    },
+  }
+}
+
+function makeContext(messages: unknown[], mainLoopModel = 'claude-sonnet-4-6') {
+  return {
+    messages,
+    options: {
+      mainLoopModel,
+    },
+    getAppState: () => ({}),
+  } as any
+}
+
+const allowTool = async (input: Record<string, unknown>) => ({
+  behavior: 'allow' as const,
+  updatedInput: input,
+})
+
+const parentMessage = makeAssistantMessage('Parent tool call')
+
+beforeEach(() => {
+  resetContextCollapse()
+  sessionMemoryInitialized = false
+})
+
+afterEach(() => {
+  resetContextCollapse()
+  sessionMemoryInitialized = false
+})
+
+describe('CtxInspectTool', () => {
+  test('tool exports and metadata remain stable', async () => {
+    expect(CtxInspectTool).toBeDefined()
+    expect(CtxInspectTool.name).toBe('CtxInspect')
+    expect(typeof CtxInspectTool.call).toBe('function')
+    expect(await CtxInspectTool.description()).toContain('context')
+    expect(CtxInspectTool.userFacingName()).toBe('CtxInspect')
+    expect(CtxInspectTool.isReadOnly()).toBe(true)
+    expect(CtxInspectTool.isConcurrencySafe()).toBe(true)
+  })
+
+  test('formats tool results for transcript rendering', () => {
+    const block = CtxInspectTool.mapToolResultToToolResultBlockParam(
+      {
+        total_tokens: 192,
+        message_count: 3,
+        context_window_model: 'claude-sonnet-4-6',
+        prompt_caching_enabled: true,
+        session_memory_enabled: true,
+        context_collapse_enabled: false,
+        summary: 'Context collapse: disabled',
+      },
+      'tool-use-id',
+    )
+
+    expect(block.tool_use_id).toBe('tool-use-id')
+    expect(block.content).toContain('192 tokens')
+    expect(block.content).toContain('3 messages')
+    expect(block.content).toContain('Context collapse: disabled')
+  })
+
+  test('returns live context counts and mechanism state', async () => {
+    const messages = [
+      makeUserMessage('Inspect the current context budget.'),
+      makeAssistantMessage('Looking at the current conversation state.'),
+    ]
+    const context = makeContext(messages, 'claude-sonnet-4-6')
+
+    const result = await (CtxInspectTool as any).call(
+      {},
+      context,
+      allowTool,
+      parentMessage,
+    )
+
+    expect(Object.keys(result.data).sort()).toEqual([
+      'context_collapse_enabled',
+      'context_window_model',
+      'message_count',
+      'prompt_caching_enabled',
+      'session_memory_enabled',
+      'summary',
+      'total_tokens',
+    ])
+    expect(result.data.message_count).toBe(messages.length)
+    expect(result.data.total_tokens).toBe(tokenCountWithEstimation(messages as any))
+    expect(result.data.context_window_model).toBe('claude-sonnet-4-6')
+    expect(result.data.prompt_caching_enabled).toBe(true)
+    expect(result.data.session_memory_enabled).toBe(false)
+    expect(result.data.context_collapse_enabled).toBe(false)
+    expect(result.data.summary).toContain('Overall context summary')
+    expect(result.data.summary).toContain('Session memory: disabled')
+    expect(result.data.summary).toContain('Context collapse: disabled')
+  })
+
+  test('query input focuses summary and collapse runtime changes the reported state', async () => {
+    const messages = [
+      makeUserMessage('Show me tool usage pressure in this thread.'),
+      makeAssistantMessage('Summarizing tool-heavy context now.'),
+    ]
+    const context = makeContext(messages, 'claude-sonnet-4-6')
+
+    const disabledResult = await (CtxInspectTool as any).call(
+      { query: 'tool usage' },
+      context,
+      allowTool,
+      parentMessage,
+    )
+
+    initContextCollapse()
+
+    const enabledResult = await (CtxInspectTool as any).call(
+      { query: 'tool usage' },
+      context,
+      allowTool,
+      parentMessage,
+    )
+
+    expect(disabledResult.data.message_count).toBe(messages.length)
+    expect(enabledResult.data.message_count).toBe(messages.length)
+    expect(disabledResult.data.total_tokens).toBe(
+      tokenCountWithEstimation(messages as any),
+    )
+    expect(enabledResult.data.total_tokens).toBe(
+      tokenCountWithEstimation(messages as any),
+    )
+    expect(disabledResult.data.summary).toContain('Focus: tool usage')
+    expect(disabledResult.data.context_collapse_enabled).toBe(false)
+    expect(enabledResult.data.context_collapse_enabled).toBe(true)
+    expect(enabledResult.data.summary).toContain('Context collapse: enabled')
+    expect(enabledResult.data.summary).toContain('Collapse spans:')
+  })
+})