[BUG] GitHub action fails

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

rror: Claude Code process exited with code 1
at Y (/home/runner/work/_actions/anthropics/claude-code-action/v1/node_modules/@anthropic-ai/claude-agent-sdk/sdk.mjs:19:9033)
at emit (node:events:98:22)
at #handleOnExit (node:child_process:520:14)

Error: Action failed with error: SDK execution error: Error: Claude Code process exited with code 1

with this workflows/claude.yaml:

name: Claude Code

on:
  issue_comment:
    types: [created]
  pull_request_review_comment:
    types: [created]

permissions:
  id-token: write
  contents: write
  pull-requests: write

jobs:
  claude:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      
      - uses: anthropics/claude-code-action@v1
        with:
          anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}

What Should Happen?

Github action finilized successful

Error Messages/Logs

rror: Claude Code process exited with code 1
      at Y (/home/runner/work/_actions/anthropics/claude-code-action/v1/node_modules/@anthropic-ai/claude-agent-sdk/sdk.mjs:19:9033)
      at emit (node:events:98:22)
      at #handleOnExit (node:child_process:520:14)

Error: Action failed with error: SDK execution error: Error: Claude Code process exited with code 1

Steps to Reproduce

name: Claude Code

on:
issue_comment:
types: [created]
pull_request_review_comment:
types: [created]

permissions:
id-token: write
contents: write
pull-requests: write

jobs:
claude:
runs-on: ubuntu-latest
steps:

• uses: actions/checkout@v4

• uses: anthropics/claude-code-action@v1

with:
anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

bun install v1.3.6 (d530ed99) + @actions/core@1.11.1 + @actions/github@6.0.1 + @anthropic-ai/claude-agent-sdk@0.2.63 + @modelcontextprotocol/sdk@1.16.0 + @octokit/graphql@8.2.2 + @octokit/rest@21.1.1 + @octokit/webhooks-types@7.6.1 + node-fetch@3.3.2 + shell-quote@1.8.3

Platform

Anthropic API

Operating System

Other Linux

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_