feat: 添加 skill learning 技能学习闭环系统

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

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

@@ -0,0 +1,107 @@
+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 {
+  DISCOVER_SKILLS_TOOL_NAME,
+  DESCRIPTION,
+  DISCOVER_SKILLS_PROMPT,
+} from './prompt.js'
+
+const inputSchema = lazySchema(() =>
+  z.strictObject({
+    description: z
+      .string()
+      .describe(
+        'Description of what you want to do. Be specific — e.g. "deploy a Next.js app to Cloudflare Workers" rather than just "deploy".',
+      ),
+    limit: z
+      .number()
+      .optional()
+      .describe('Maximum number of results to return (default: 5)'),
+  }),
+)
+type InputSchema = ReturnType<typeof inputSchema>
+type DiscoverInput = z.infer<InputSchema>
+
+type DiscoverOutput = {
+  results: Array<{ name: string; description: string; score: number }>
+  count: number
+}
+
+export const DiscoverSkillsTool = buildTool({
+  name: DISCOVER_SKILLS_TOOL_NAME,
+  searchHint: 'find search discover skills commands tools capabilities',
+  maxResultSizeChars: 10_000,
+  strict: true,
+
+  get inputSchema(): InputSchema {
+    return inputSchema()
+  },
+
+  async description() {
+    return DESCRIPTION
+  },
+  async prompt() {
+    return DISCOVER_SKILLS_PROMPT
+  },
+
+  isConcurrencySafe() {
+    return true
+  },
+  isReadOnly() {
+    return true
+  },
+
+  userFacingName() {
+    return 'Discover Skills'
+  },
+
+  renderToolUseMessage(input: Partial<DiscoverInput>) {
+    return `Searching skills: ${input.description?.slice(0, 80) ?? '...'}`
+  },
+
+  mapToolResultToToolResultBlockParam(
+    content: DiscoverOutput,
+    toolUseID: string,
+  ): ToolResultBlockParam {
+    if (content.count === 0) {
+      return {
+        tool_use_id: toolUseID,
+        type: 'tool_result',
+        content: 'No matching skills found for that description.',
+      }
+    }
+    const lines = content.results.map(
+      (r, i) =>
+        `${i + 1}. **${r.name}** (score: ${r.score.toFixed(2)})\n   ${r.description}`,
+    )
+    return {
+      tool_use_id: toolUseID,
+      type: 'tool_result',
+      content: `Found ${content.count} relevant skill(s):\n\n${lines.join('\n\n')}`,
+    }
+  },
+
+  async call(input: DiscoverInput, context) {
+    const { getSkillIndex, searchSkills } = await import(
+      'src/services/skillSearch/localSearch.js'
+    )
+    const { getCwd } = await import('src/utils/cwd.js')
+    const cwd = getCwd()
+
+    const index = await getSkillIndex(cwd)
+    const results = searchSkills(input.description, index, input.limit ?? 5)
+
+    return {
+      data: {
+        results: results.map(r => ({
+          name: r.name,
+          description: r.description,
+          score: r.score,
+        })),
+        count: results.length,
+      },
+    }
+  },
+})

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

@@ -0,0 +1,54 @@
+import { describe, test, expect } from 'bun:test'
+import { DISCOVER_SKILLS_TOOL_NAME } from '../prompt.js'
+
+describe('DiscoverSkillsTool', () => {
+  test('DISCOVER_SKILLS_TOOL_NAME is not empty', () => {
+    expect(DISCOVER_SKILLS_TOOL_NAME).toBe('DiscoverSkills')
+    expect(DISCOVER_SKILLS_TOOL_NAME.length).toBeGreaterThan(0)
+  })
+
+  test('tool exports are functions', async () => {
+    const { DiscoverSkillsTool } = await import('../DiscoverSkillsTool.js')
+    expect(DiscoverSkillsTool).toBeDefined()
+    expect(DiscoverSkillsTool.name).toBe('DiscoverSkills')
+    expect(typeof DiscoverSkillsTool.call).toBe('function')
+  })
+
+  test('tool has correct metadata', async () => {
+    const { DiscoverSkillsTool } = await import('../DiscoverSkillsTool.js')
+    expect(await DiscoverSkillsTool.description()).toContain('skill')
+    expect(DiscoverSkillsTool.userFacingName()).toBe('Discover Skills')
+    expect(DiscoverSkillsTool.isReadOnly()).toBe(true)
+    expect(DiscoverSkillsTool.isConcurrencySafe()).toBe(true)
+  })
+
+  test('renderToolUseMessage formats input', async () => {
+    const { DiscoverSkillsTool } = await import('../DiscoverSkillsTool.js')
+    const msg = DiscoverSkillsTool.renderToolUseMessage({
+      description: 'deploy to cloudflare',
+    })
+    expect(msg).toContain('deploy to cloudflare')
+  })
+
+  test('mapToolResultToToolResultBlockParam formats empty results', async () => {
+    const { DiscoverSkillsTool } = await import('../DiscoverSkillsTool.js')
+    const result = DiscoverSkillsTool.mapToolResultToToolResultBlockParam(
+      { results: [], count: 0 },
+      'test-id',
+    )
+    expect(result.content).toContain('No matching skills')
+  })
+
+  test('mapToolResultToToolResultBlockParam formats results', async () => {
+    const { DiscoverSkillsTool } = await import('../DiscoverSkillsTool.js')
+    const result = DiscoverSkillsTool.mapToolResultToToolResultBlockParam(
+      {
+        results: [{ name: 'test-skill', description: 'A test skill', score: 0.85 }],
+        count: 1,
+      },
+      'test-id',
+    )
+    expect(result.content).toContain('test-skill')
+    expect(result.content).toContain('0.85')
+  })
+})

packages/builtin-tools/src/tools/DiscoverSkillsTool/prompt.ts

@@ -1,3 +1,13 @@
-// Auto-generated stub — replace with real implementation
-export {};
-export const DISCOVER_SKILLS_TOOL_NAME: string = '';
+export const DISCOVER_SKILLS_TOOL_NAME = 'DiscoverSkills'
+
+export const DESCRIPTION =
+  'Search for relevant skills by describing what you want to do'
+
+export const DISCOVER_SKILLS_PROMPT = `Search for skills relevant to a task description. Returns matching skills ranked by relevance.
+
+Use this when:
+- The auto-surfaced skills don't cover your current task
+- You're pivoting to a different kind of work mid-conversation
+- You want to find specialized skills for an unusual workflow
+
+The search uses TF-IDF keyword matching against all registered skills (bundled, user-defined, and MCP-provided). Results include skill name, description, and relevance score.`