claude-code-action/action.yml

name: "Claude Code Action v1.0"
description: "Flexible GitHub automation platform with Claude. Auto-detects mode based on event type: PR reviews, @claude mentions, or custom automation."
branding:
  icon: "at-sign"
  color: "orange"

inputs:
  trigger_phrase:
    description: "The trigger phrase to look for in comments or issue body"
    required: false
    default: "@claude"
  assignee_trigger:
    description: "The assignee username that triggers the action (e.g. @claude)"
    required: false
  label_trigger:
    description: "The label that triggers the action (e.g. claude)"
    required: false
    default: "claude"
  base_branch:
    description: "The branch to use as the base/source when creating new branches (defaults to repository default branch)"
    required: false
  branch_prefix:
    description: "The prefix to use for Claude branches (defaults to 'claude/', use 'claude-' for dash format)"
    required: false
    default: "claude/"

  # Claude Code configuration
  model:
    description: "Model to use (provider-specific format required for Bedrock/Vertex)"
    required: false
  fallback_model:
    description: "Enable automatic fallback to specified model when primary model is unavailable"
    required: false
  allowed_tools:
    description: "Additional tools for Claude to use (the base GitHub tools will always be included)"
    required: false
    default: ""
  disallowed_tools:
    description: "Tools that Claude should never use"
    required: false
    default: ""
  custom_instructions:
    description: "Additional custom instructions to include in the prompt for Claude"
    required: false
    default: ""
  prompt:
    description: "Instructions for Claude. Can be a direct prompt, slash command (e.g. /review), or custom template."
    required: false
    default: ""
  mcp_config:
    description: "Additional MCP configuration (JSON string) that merges with the built-in GitHub MCP servers"
  additional_permissions:
    description: "Additional permissions to enable. Currently supports 'actions: read' for viewing workflow results"
    required: false
    default: ""
  claude_env:
    description: "Custom environment variables to pass to Claude Code execution (YAML format)"
    required: false
    default: ""
  settings:
    description: "Claude Code settings as JSON string or path to settings JSON file"
    required: false
    default: ""

  # Auth configuration
  anthropic_api_key:
    description: "Anthropic API key (required for direct API, not needed for Bedrock/Vertex)"
    required: false
  claude_code_oauth_token:
    description: "Claude Code OAuth token (alternative to anthropic_api_key)"
    required: false
  github_token:
    description: "GitHub token with repo and pull request permissions (optional if using GitHub App)"
    required: false
  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"

  max_turns:
    description: "Maximum number of conversation turns"
    required: false
    default: ""
  timeout_minutes:
    description: "Timeout in minutes for execution"
    required: false
    default: "30"
  claude_args:
    description: "Additional arguments to pass directly to Claude CLI"
    required: false
    default: ""
  use_sticky_comment:
    description: "Use just one comment to deliver issue/PR comments"
    required: false
    default: "false"
  use_commit_signing:
    description: "Enable commit signing using GitHub's commit signature verification. When false, Claude uses standard git commands"
    required: false
    default: "false"
  experimental_allowed_domains:
    description: "Restrict network access to these domains only (newline-separated). If not set, no restrictions are applied. Provider domains are auto-detected."
    required: false
    default: ""

outputs:
  execution_file:
    description: "Path to the Claude Code execution output file"
    value: ${{ steps.claude-code.outputs.execution_file }}
  branch_name:
    description: "The branch created by Claude Code for this execution"
    value: ${{ steps.prepare.outputs.CLAUDE_BRANCH }}

runs:
  using: "composite"
  steps:
    - name: Install Bun
      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: Install Dependencies
      shell: bash
      run: |
        cd ${GITHUB_ACTION_PATH}
        bun install

    - name: Prepare action
      id: prepare
      shell: bash
      run: |
        bun run ${GITHUB_ACTION_PATH}/src/entrypoints/prepare.ts
      env:
        MODE: ${{ inputs.mode }}
        PROMPT: ${{ inputs.prompt }}
        TRIGGER_PHRASE: ${{ inputs.trigger_phrase }}
        ASSIGNEE_TRIGGER: ${{ inputs.assignee_trigger }}
        LABEL_TRIGGER: ${{ inputs.label_trigger }}
        BASE_BRANCH: ${{ inputs.base_branch }}
        BRANCH_PREFIX: ${{ inputs.branch_prefix }}
        ALLOWED_TOOLS: ${{ inputs.allowed_tools }}
        DISALLOWED_TOOLS: ${{ inputs.disallowed_tools }}
        CUSTOM_INSTRUCTIONS: ${{ inputs.custom_instructions }}
        DIRECT_PROMPT: ${{ inputs.direct_prompt }}
        OVERRIDE_PROMPT: ${{ inputs.override_prompt }}
        MCP_CONFIG: ${{ inputs.mcp_config }}
        OVERRIDE_GITHUB_TOKEN: ${{ inputs.github_token }}
        GITHUB_RUN_ID: ${{ github.run_id }}
        USE_STICKY_COMMENT: ${{ inputs.use_sticky_comment }}
        DEFAULT_WORKFLOW_TOKEN: ${{ github.token }}
        ADDITIONAL_PERMISSIONS: ${{ inputs.additional_permissions }}
        USE_COMMIT_SIGNING: ${{ inputs.use_commit_signing }}

    - name: Install Base Action Dependencies
      if: steps.prepare.outputs.contains_trigger == 'true'
      shell: bash
      run: |
        echo "Installing base-action dependencies..."
        cd ${GITHUB_ACTION_PATH}/base-action
        bun install
        echo "Base-action dependencies installed"
        cd -
        # Install Claude Code globally
        bun install -g @anthropic-ai/claude-code@1.0.70

    - name: Setup Network Restrictions
      if: steps.prepare.outputs.contains_trigger == 'true' && inputs.experimental_allowed_domains != ''
      shell: bash
      run: |
        chmod +x ${GITHUB_ACTION_PATH}/scripts/setup-network-restrictions.sh
        ${GITHUB_ACTION_PATH}/scripts/setup-network-restrictions.sh
      env:
        EXPERIMENTAL_ALLOWED_DOMAINS: ${{ inputs.experimental_allowed_domains }}

    - name: Run Claude Code
      id: claude-code
      if: steps.prepare.outputs.contains_trigger == 'true'
      shell: bash
      run: |

        # Run the base-action
        bun run ${GITHUB_ACTION_PATH}/base-action/src/index.ts
      env:
        # Base-action inputs
        CLAUDE_CODE_ACTION: "1"
        INPUT_PROMPT_FILE: ${{ runner.temp }}/claude-prompts/claude-prompt.txt
        INPUT_ALLOWED_TOOLS: ${{ env.ALLOWED_TOOLS }}
        INPUT_DISALLOWED_TOOLS: ${{ env.DISALLOWED_TOOLS }}
        INPUT_MAX_TURNS: ${{ inputs.max_turns }}
        INPUT_MCP_CONFIG: ${{ steps.prepare.outputs.mcp_config }}
        INPUT_SETTINGS: ${{ inputs.settings }}
        INPUT_SYSTEM_PROMPT: ""
        INPUT_APPEND_SYSTEM_PROMPT: ${{ env.APPEND_SYSTEM_PROMPT }}
        INPUT_TIMEOUT_MINUTES: ${{ inputs.timeout_minutes }}
        INPUT_CLAUDE_ENV: ${{ inputs.claude_env }}
        INPUT_FALLBACK_MODEL: ${{ inputs.fallback_model }}
        INPUT_CLAUDE_ARGS: ${{ inputs.claude_args }}
        INPUT_EXPERIMENTAL_SLASH_COMMANDS_DIR: ${{ github.action_path }}/slash-commands

        # Model configuration
        ANTHROPIC_MODEL: ${{ inputs.model || inputs.anthropic_model }}
        GITHUB_TOKEN: ${{ steps.prepare.outputs.GITHUB_TOKEN }}
        NODE_VERSION: ${{ env.NODE_VERSION }}
        DETAILED_PERMISSION_MESSAGES: "1"

        # 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 }}
        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 }}

        # Model-specific regions for Vertex
        VERTEX_REGION_CLAUDE_3_5_HAIKU: ${{ env.VERTEX_REGION_CLAUDE_3_5_HAIKU }}
        VERTEX_REGION_CLAUDE_3_5_SONNET: ${{ env.VERTEX_REGION_CLAUDE_3_5_SONNET }}
        VERTEX_REGION_CLAUDE_3_7_SONNET: ${{ env.VERTEX_REGION_CLAUDE_3_7_SONNET }}

    - name: Update comment with job link
      if: steps.prepare.outputs.contains_trigger == 'true' && steps.prepare.outputs.claude_comment_id && always()
      shell: bash
      run: |
        bun run ${GITHUB_ACTION_PATH}/src/entrypoints/update-comment-link.ts
      env:
        REPOSITORY: ${{ github.repository }}
        PR_NUMBER: ${{ github.event.issue.number || github.event.pull_request.number }}
        CLAUDE_COMMENT_ID: ${{ steps.prepare.outputs.claude_comment_id }}
        GITHUB_RUN_ID: ${{ github.run_id }}
        GITHUB_TOKEN: ${{ steps.prepare.outputs.GITHUB_TOKEN }}
        GITHUB_EVENT_NAME: ${{ github.event_name }}
        TRIGGER_COMMENT_ID: ${{ github.event.comment.id }}
        CLAUDE_BRANCH: ${{ steps.prepare.outputs.CLAUDE_BRANCH }}
        IS_PR: ${{ github.event.issue.pull_request != null || github.event_name == 'pull_request_review_comment' }}
        BASE_BRANCH: ${{ steps.prepare.outputs.BASE_BRANCH }}
        CLAUDE_SUCCESS: ${{ steps.claude-code.outputs.conclusion == 'success' }}
        OUTPUT_FILE: ${{ steps.claude-code.outputs.execution_file || '' }}
        TRIGGER_USERNAME: ${{ github.event.comment.user.login || github.event.issue.user.login || github.event.pull_request.user.login || github.event.sender.login || github.triggering_actor || github.actor || '' }}
        PREPARE_SUCCESS: ${{ steps.prepare.outcome == 'success' }}
        PREPARE_ERROR: ${{ steps.prepare.outputs.prepare_error || '' }}
        USE_STICKY_COMMENT: ${{ inputs.use_sticky_comment }}
        USE_COMMIT_SIGNING: ${{ inputs.use_commit_signing }}

    - name: Display Claude Code Report
      if: steps.prepare.outputs.contains_trigger == 'true' && steps.claude-code.outputs.execution_file != ''
      shell: bash
      run: |
        # Try to format the turns, but if it fails, dump the raw JSON
        if bun run ${{ github.action_path }}/src/entrypoints/format-turns.ts "${{ steps.claude-code.outputs.execution_file }}" >> $GITHUB_STEP_SUMMARY 2>/dev/null; then
          echo "Successfully formatted Claude Code report"
        else
          echo "## Claude Code Report (Raw Output)" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "Failed to format output (please report). Here's the raw JSON:" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo '```json' >> $GITHUB_STEP_SUMMARY
          cat "${{ steps.claude-code.outputs.execution_file }}" >> $GITHUB_STEP_SUMMARY
          echo '```' >> $GITHUB_STEP_SUMMARY
        fi

    - name: Revoke app token
      if: always() && inputs.github_token == ''
      shell: bash
      run: |
        curl -L \
          -X DELETE \
          -H "Accept: application/vnd.github+json" \
          -H "Authorization: Bearer ${{ steps.prepare.outputs.GITHUB_TOKEN }}" \
          -H "X-GitHub-Api-Version: 2022-11-28" \
          ${GITHUB_API_URL:-https://api.github.com}/installation/token