ci: merge Claude workflows with sandbox-agent skill installation

.github/workflows/claude.yml

@@ -1,4 +1,4 @@
-name: Claude Assistant
+name: Claude Code
 
 on:
   issue_comment:
@@ -6,27 +6,29 @@ on:
   pull_request_review_comment:
     types: [created]
   issues:
-    types: [opened, assigned, labeled]
+    types: [opened, assigned]
   pull_request_review:
     types: [submitted]
-  workflow_dispatch:
-    inputs:
-      prompt:
-        description: "Prompt to send to Claude"
-        required: false
-        type: string
 
 jobs:
-  claude-response:
+  claude:
+    if: |
+      (github.event_name == 'issue_comment' && contains(github.event.comment.body, '@claude')) ||
+      (github.event_name == 'pull_request_review_comment' && contains(github.event.comment.body, '@claude')) ||
+      (github.event_name == 'pull_request_review' && contains(github.event.review.body, '@claude')) ||
+      (github.event_name == 'issues' && (contains(github.event.issue.body, '@claude') || contains(github.event.issue.title, '@claude')))
     runs-on: ubuntu-latest
     permissions:
       contents: read
-      issues: write
-      pull-requests: write
+      pull-requests: read
+      issues: read
       id-token: write
+      actions: read
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
 
       - name: Setup Node.js
         uses: actions/setup-node@v4
@@ -36,8 +38,10 @@ jobs:
       - name: Install sandbox-agent skill
         run: npx skills add https://sandboxagent.dev/docs --yes
 
-      - name: Run Claude
+      - name: Run Claude Code
+        id: claude
         uses: anthropics/claude-code-action@v1
         with:
-          anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
-          prompt: ${{ inputs.prompt }}
+          claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
+          additional_permissions: |
+            actions: read