[Bug] Claude Code fails with exit code 1 - no meaningful error message provided

[cenkkiran]

Describe the bug Claude Code action fails with exit code 1. The error output shows a stack trace from the SDK's error handler but doesn't provide meaningful information about what actually caused the failure.

To Reproduce

1. Set up workflow with anthropics/claude-code-action@v1
2. Trigger via @claude mention in an issue or PR comment
3. Action fails with exit code 1

Expected behavior The action should either succeed or provide a clear error message indicating what failed (e.g., invalid token, model access issue, tool configuration error).

Screenshots

13243 |       throw error;
13244 |     }
13245 |   }
13246 |   getProcessExitError(code, signal) {
13247 |     if (code !== 0 && code !== null) {
13248 |       return new Error`Claude Code process exited with code ${code}`);
                     ^
error: Claude Code process exited with code 1
      at getProcessExitError (/home/runner/work/_actions/anthropics/claude-code-action/v1/base-action/node_modules/@anthropic-ai/claude-agent-sdk/sdk.mjs:13248:14)
      at exitHandler (/home/runner/work/_actions/anthropics/claude-code-action/v1/base-action/node_modules/@anthropic-ai/claude-agent-sdk/sdk.mjs:13373:28)
      at emit (node:events:92:22)
      at #handleOnExit (node:child_process:511:14)
Error: Process completed with exit code 1.

Workflow yml file

name: Claude Code
on:
  issue_comment:
    types: [created]
  pull_request_review_comment:
    types: [created]
  pull_request:
    types: [opened, synchronize, ready_for_review]
  issues:
    types: [opened, assigned]
  pull_request_review:
    types: [submitted]

jobs:
  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: write
      pull-requests: write
      issues: write
      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
        with:
          node-version: "20"
          cache: "npm"

      - name: Install dependencies
        run: npm ci --legacy-peer-deps

      - name: Run Claude Code
        id: claude
        uses: anthropics/claude-code-action@v1
        with:
          claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
          model: claude-sonnet-4-20250514
          max_turns: 20
          allowed_tools: "Read,Write,Edit,MultiEdit,Bash(npm *),Bash(npx *),Bash(git *),mcp__github__*"

API Provider [x] Anthropic First-Party API (default) [ ] AWS Bedrock [ ] GCP Vertex

Additional context

• The error message doesn't indicate the root cause (token issue, model access, tool config, etc.)
• Would be helpful if the action logged more details before exiting with code 1
• Possibly related: using both allowed_tools param and --allowedTools in claude_args might cause conflicts

[vibe-kanban-cloud[bot]]

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[jorben]

I'm actively using this project and have been eagerly waiting for this feature, merging this would benefit many users like me. Thank you for considering it!