claude-code-action/base-action/action.yml

name: "Claude Code Base Action"
description: "Run Claude Code in GitHub Actions workflows"
branding:
  icon: "code"
  color: "orange"

inputs:
  # Claude Code arguments
  prompt:
    description: "The prompt to send to Claude Code (mutually exclusive with prompt_file)"
    required: false
    default: ""
  prompt_file:
    description: "Path to a file containing the prompt to send to Claude Code (mutually exclusive with prompt)"
    required: false
    default: ""
  allowed_tools:
    description: "Comma-separated list of allowed tools for Claude Code to use"
    required: false
    default: ""
  disallowed_tools:
    description: "Comma-separated list of disallowed tools that Claude Code cannot use"
    required: false
    default: ""
  max_turns:
    description: "Maximum number of conversation turns (default: no limit)"
    required: false
    default: ""
  mcp_config:
    description: "MCP configuration as JSON string or path to MCP configuration JSON file"
    required: false
    default: ""
  settings:
    description: "Claude Code settings as JSON string or path to settings JSON file"
    required: false
    default: ""
  system_prompt:
    description: "Override system prompt"
    required: false
    default: ""
  append_system_prompt:
    description: "Append to system prompt"
    required: false
    default: ""
  model:
    description: "Model to use (provider-specific format required for Bedrock/Vertex)"
    required: false
  anthropic_model:
    description: "DEPRECATED: Use 'model' instead. Model to use (provider-specific format required for Bedrock/Vertex)"
    required: false
  fallback_model:
    description: "Enable automatic fallback to specified model when default model is unavailable"
    required: false
  claude_env:
    description: "Custom environment variables to pass to Claude Code execution (YAML multiline format)"
    required: false
    default: ""

  # Action settings
  timeout_minutes:
    description: "Timeout in minutes for Claude Code execution"
    required: false
    default: "10"
  experimental_slash_commands_dir:
    description: "Experimental: Directory containing slash command files to install"
    required: false

  # Authentication settings
  anthropic_api_key:
    description: "Anthropic API key (required for direct Anthropic API)"
    required: false
    default: ""
  claude_code_oauth_token:
    description: "Claude Code OAuth token (alternative to anthropic_api_key)"
    required: false
    default: ""
  use_bedrock:
    description: "Use Amazon Bedrock with OIDC authentication instead of direct Anthropic API"
    required: false
    default: "false"
  use_vertex:
    description: "Use Google Vertex AI with OIDC authentication instead of direct Anthropic API"
    required: false
    default: "false"

  use_node_cache:
    description: "Whether to use Node.js dependency caching (set to true only for Node.js projects with lock files)"
    required: false
    default: "false"
  path_to_claude_code_executable:
    description: "Optional path to a custom Claude Code executable. If provided, skips automatic installation and uses this executable instead. WARNING: Using an older version may cause problems if the action begins taking advantage of new Claude Code features. This input is typically not needed unless you're debugging something specific or have unique needs in your environment."
    required: false
    default: ""
  path_to_bun_executable:
    description: "Optional path to a custom Bun executable. If provided, skips automatic Bun installation and uses this executable instead. WARNING: Using an incompatible version may cause problems if the action requires specific Bun features. This input is typically not needed unless you're debugging something specific or have unique needs in your environment."
    required: false
    default: ""

outputs:
  conclusion:
    description: "Execution status of Claude Code ('success' or 'failure')"
    value: ${{ steps.run_claude.outputs.conclusion }}
  execution_file:
    description: "Path to the JSON file containing Claude Code execution log"
    value: ${{ steps.run_claude.outputs.execution_file }}

runs:
  using: "composite"
  steps:
    - name: Setup Node.js
      uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # https://github.com/actions/setup-node/releases/tag/v4.4.0
      with:
        node-version: ${{ env.NODE_VERSION || '18.x' }}
        cache: ${{ inputs.use_node_cache == 'true' && 'npm' || '' }}

    - name: Install Bun
      if: inputs.path_to_bun_executable == ''
      uses: oven-sh/setup-bun@735343b667d3e6f658f44d0eca948eb6282f2b76 # https://github.com/oven-sh/setup-bun/releases/tag/v2.0.2
      with:
        bun-version: 1.2.11

    - name: Setup Custom Bun Path
      if: inputs.path_to_bun_executable != ''
      shell: bash
      run: |
        echo "Using custom Bun executable: ${{ inputs.path_to_bun_executable }}"
        # Add the directory containing the custom executable to PATH
        BUN_DIR=$(dirname "${{ inputs.path_to_bun_executable }}")
        echo "$BUN_DIR" >> "$GITHUB_PATH"

    - name: Install Dependencies
      shell: bash
      run: |
        cd ${GITHUB_ACTION_PATH}
        bun install

    - name: Install Claude Code
      shell: bash
      run: |
        if [ -z "${{ inputs.path_to_claude_code_executable }}" ]; then
          echo "Installing Claude Code..."
          curl -fsSL https://claude.ai/install.sh | bash -s 1.0.90
        else
          echo "Using custom Claude Code executable: ${{ inputs.path_to_claude_code_executable }}"
          # Add the directory containing the custom executable to PATH
          CLAUDE_DIR=$(dirname "${{ inputs.path_to_claude_code_executable }}")
          echo "$CLAUDE_DIR" >> "$GITHUB_PATH"
        fi

    - name: Run Claude Code Action
      shell: bash
      id: run_claude
      run: |
        # Change to CLAUDE_WORKING_DIR if set (for running in custom directories)
        if [ -n "$CLAUDE_WORKING_DIR" ]; then
          echo "Changing directory to CLAUDE_WORKING_DIR: $CLAUDE_WORKING_DIR"
          cd "$CLAUDE_WORKING_DIR"
        fi
        bun run ${GITHUB_ACTION_PATH}/src/index.ts
      env:
        # Model configuration
        CLAUDE_CODE_ACTION: "1"
        ANTHROPIC_MODEL: ${{ inputs.model || inputs.anthropic_model }}
        INPUT_PROMPT: ${{ inputs.prompt }}
        INPUT_PROMPT_FILE: ${{ inputs.prompt_file }}
        INPUT_ALLOWED_TOOLS: ${{ inputs.allowed_tools }}
        INPUT_DISALLOWED_TOOLS: ${{ inputs.disallowed_tools }}
        INPUT_MAX_TURNS: ${{ inputs.max_turns }}
        INPUT_MCP_CONFIG: ${{ inputs.mcp_config }}
        INPUT_SETTINGS: ${{ inputs.settings }}
        INPUT_SYSTEM_PROMPT: ${{ inputs.system_prompt }}
        INPUT_APPEND_SYSTEM_PROMPT: ${{ inputs.append_system_prompt }}
        INPUT_TIMEOUT_MINUTES: ${{ inputs.timeout_minutes }}
        INPUT_CLAUDE_ENV: ${{ inputs.claude_env }}
        INPUT_FALLBACK_MODEL: ${{ inputs.fallback_model }}
        INPUT_EXPERIMENTAL_SLASH_COMMANDS_DIR: ${{ inputs.experimental_slash_commands_dir }}
        INPUT_PATH_TO_CLAUDE_CODE_EXECUTABLE: ${{ inputs.path_to_claude_code_executable }}
        INPUT_PATH_TO_BUN_EXECUTABLE: ${{ inputs.path_to_bun_executable }}

        # Provider configuration
        ANTHROPIC_API_KEY: ${{ inputs.anthropic_api_key }}
        CLAUDE_CODE_OAUTH_TOKEN: ${{ inputs.claude_code_oauth_token }}
        ANTHROPIC_BASE_URL: ${{ env.ANTHROPIC_BASE_URL }}
        # Only set provider flags if explicitly true, since any value (including "false") is truthy
        CLAUDE_CODE_USE_BEDROCK: ${{ inputs.use_bedrock == 'true' && '1' || '' }}
        CLAUDE_CODE_USE_VERTEX: ${{ inputs.use_vertex == 'true' && '1' || '' }}

        # AWS configuration
        AWS_REGION: ${{ env.AWS_REGION }}
        AWS_ACCESS_KEY_ID: ${{ env.AWS_ACCESS_KEY_ID }}
        AWS_SECRET_ACCESS_KEY: ${{ env.AWS_SECRET_ACCESS_KEY }}
        AWS_SESSION_TOKEN: ${{ env.AWS_SESSION_TOKEN }}
        ANTHROPIC_BEDROCK_BASE_URL: ${{ env.ANTHROPIC_BEDROCK_BASE_URL || (env.AWS_REGION && format('https://bedrock-runtime.{0}.amazonaws.com', env.AWS_REGION)) }}

        # GCP configuration
        ANTHROPIC_VERTEX_PROJECT_ID: ${{ env.ANTHROPIC_VERTEX_PROJECT_ID }}
        CLOUD_ML_REGION: ${{ env.CLOUD_ML_REGION }}
        GOOGLE_APPLICATION_CREDENTIALS: ${{ env.GOOGLE_APPLICATION_CREDENTIALS }}
        ANTHROPIC_VERTEX_BASE_URL: ${{ env.ANTHROPIC_VERTEX_BASE_URL }}