feat: 添加 Deep Code Bot workflow，支持 /deepcode 指令自动答疑和提 PR

Author: liwenka1

.github/workflows/deep-code-bot.yml

@@ -0,0 +1,143 @@
+name: Deep Code Bot
+
+on:
+  issue_comment:
+    types: [created]
+
+permissions:
+  contents: write
+  pull-requests: write
+  issues: write
+
+jobs:
+  deepcode:
+    # 只有仓库 Owner 自己才能触发
+    if: |
+      contains(github.event.comment.body, '/deepcode') &&
+      github.event.comment.user.login == github.event.repository.owner.login
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.issue.pull_request && format('refs/pull/{0}/head', github.event.issue.number) || github.ref }}
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - name: Install deep-code
+        run: npm i -g @liwenkai/deepcode
+
+      # 提取 /deepcode 后面的内容作为指令
+      - name: Extract prompt
+        id: prompt
+        uses: actions/github-script@v7
+        with:
+          result-encoding: string
+          script: |
+            const body = context.payload.comment.body;
+            return body.replace(/^\/deepcode\s*/, '').trim() || '请分析一下这个项目';
+
+      # 启动 deep-code HTTP 服务（不需要 TTY）
+      - name: Start deep-code server
+        env:
+          DEEPSEEK_API_KEY: ${{ secrets.DEEPSEEK_API_KEY }}
+          # 预放行所有工具，绕过交互式审批
+          DEEP_CODE_APPROVAL_AUTO_ALLOW: "read_,list_,grep_,write_,apply_,shell,job,fetch_,web_"
+        run: |
+          deepcode serve --http --port 7878 --auth-token bot-token &
+          echo "等待服务就绪..."
+          for i in $(seq 1 15); do
+            if curl -s http://127.0.0.1:7878/health > /dev/null 2>&1; then
+              echo "服务已就绪"
+              break
+            fi
+            sleep 1
+          done
+
+      # 发送指令给 deep-code，等待完成，保存返回的 SSE 事件
+      - name: Run deep-code
+        run: |
+          PROMPT='${{ steps.prompt.outputs.result }}'
+          echo "指令: $PROMPT"
+
+          # 调用 /v1/prompt API，返回 SSE 流
+          curl -s -N -X POST http://127.0.0.1:7878/v1/prompt \
+            -H "Authorization: Bearer bot-token" \
+            -H "Content-Type: application/json" \
+            -d "{\"prompt\": \"$PROMPT\"}" \
+            > deepcode-events.txt 2>&1
+
+          # 从 SSE 中提取 provider 事件的文本内容（AI 的回答）
+          grep '^data: ' deepcode-events.txt | while read -r line; do
+            kind=$(echo "$line" | sed 's/^data: //' | jq -r '.item.kind // empty' 2>/dev/null)
+            if [ "$kind" = "provider" ]; then
+              echo "$line" | sed 's/^data: //' | jq -r '.item.payload.delta // empty' 2>/dev/null
+            fi
+          done > deepcode-answer.txt
+
+          # 如果 AI 回答为空，把原始事件存下来方便排查
+          if [ ! -s deepcode-answer.txt ]; then
+            echo "（deep-code 未输出文本回答，以下为原始事件摘要）" > deepcode-answer.txt
+            grep '^data: ' deepcode-events.txt | head -20 | sed 's/^data: //' | while read -r line; do
+              kind=$(echo "$line" | jq -r '.item.kind // empty' 2>/dev/null)
+              echo "- 事件: $kind"
+            done >> deepcode-answer.txt
+          fi
+
+      # 检查是否有文件被修改
+      - name: Check diff
+        id: diff
+        run: |
+          if [[ -n $(git status --porcelain) ]]; then
+            echo "has_changes=true" >> $GITHUB_OUTPUT
+            echo "修改的文件:" >> deepcode-summary.txt
+            git status --short >> deepcode-summary.txt
+          else
+            echo "has_changes=false" >> $GITHUB_OUTPUT
+          fi
+
+      # 有文件改动则提交 PR
+      - name: Create PR
+        if: steps.diff.outputs.has_changes == 'true'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          BRANCH="deepcode-bot-$(date +%s)"
+          git config user.name "deep-code-bot"
+          git config user.email "bot@deep-code.dev"
+          git checkout -b "$BRANCH"
+          git add -A
+          git commit -m "🤖 deep-code: ${{ steps.prompt.outputs.result }}"
+          git push origin "$BRANCH"
+          gh pr create \
+            --title "🤖 deep-code: ${{ steps.prompt.outputs.result }}" \
+            --body "由 @${{ github.event.comment.user.login }} 在 Issue #${{ github.event.issue.number }} 中触发" \
+            --head "$BRANCH" \
+            --label "🤖 deep-code"
+
+      # 把 deep-code 的回答贴回 Issue 评论区
+      - name: Post reply
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const fs = require('fs');
+            const answer = fs.readFileSync('deepcode-answer.txt', 'utf8').slice(0, 60000);
+            const hasChanges = '${{ steps.diff.outputs.has_changes }}' === 'true';
+
+            let body = '## 🤖 Deep Code\n\n';
+            body += '```\n' + answer + '\n```\n\n';
+
+            if (hasChanges) {
+              body += '✅ **已提交 PR，请查看仓库中的新 PR。**';
+            } else {
+              body += '✅ 分析完毕，当前代码无需修改。';
+            }
+
+            github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: body
+            });