feat: integrate claude-code-base-action as local subaction (#285)

* feat: integrate claude-code-base-action as local subaction - Copy claude-code-base-action into base-action/ directory - Update action.yml to reference ./base-action instead of external repo - Preserve complete base action structure for future refactoring This eliminates the external dependency while maintaining modularity. * feat: consolidate CI workflows and add version bump workflow - Move base-action test workflows to main .github/workflows/ - Update workflow references to use ./base-action - Add CI jobs for base-action (test, typecheck, prettier) - Add bump-claude-code-version workflow for base-action - Remove redundant .github directory from base-action This consolidates all CI workflows in one place while maintaining full test coverage for both the main action and base-action. * tsc * copy again * fix tests * fix: use absolute path for base-action reference Replace relative path ./base-action with ${{ github.action_path }}/base-action to ensure the action works correctly when used in other repositories. 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com> * fix: inline base-action execution to support usage in other repos Replace uses: ./base-action with direct shell execution since GitHub Actions doesn't support dynamic paths in composite actions. This ensures the action works correctly when used in other repositories. Changes: - Install Claude Code globally before execution - Run base-action's index.ts directly with bun - Pass all required INPUT_* environment variables - Maintain base-action for future separate publishing 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com> --------- Co-authored-by: Claude <noreply@anthropic.com>
2026-01-22 22:44:13 +08:00 · 2025-07-18 13:52:56 -07:00
parent 00b4a23551
commit 8335bda243
38 changed files with 3586 additions and 17 deletions
--- a/base-action/.gitignore
+++ b/base-action/.gitignore
@@ -0,0 +1,4 @@
+.DS_Store
+node_modules
+
+**/.claude/settings.local.json
--- a/base-action/.npmrc
+++ b/base-action/.npmrc
@@ -0,0 +1,2 @@
+engine-strict=true
+registry=https://registry.npmjs.org/
--- a/base-action/.prettierrc
+++ b/base-action/.prettierrc
@@ -0,0 +1 @@
+{}
--- a/base-action/CLAUDE.md
+++ b/base-action/CLAUDE.md
@@ -0,0 +1,60 @@
+# CLAUDE.md
+
+## Common Commands
+
+### Development Commands
+
+- Build/Type check: `bun run typecheck`
+- Format code: `bun run format`
+- Check formatting: `bun run format:check`
+- Run tests: `bun test`
+- Install dependencies: `bun install`
+
+### Action Testing
+
+- Test action locally: `./test-local.sh`
+- Test specific file: `bun test test/prepare-prompt.test.ts`
+
+## Architecture Overview
+
+This is a GitHub Action that allows running Claude Code within GitHub workflows. The action consists of:
+
+### Core Components
+
+1. **Action Definition** (`action.yml`): Defines inputs, outputs, and the composite action steps
+2. **Prompt Preparation** (`src/index.ts`): Runs Claude Code with specified arguments
+
+### Key Design Patterns
+
+- Uses Bun runtime for development and execution
+- Named pipes for IPC between prompt input and Claude process
+- JSON streaming output format for execution logs
+- Composite action pattern to orchestrate multiple steps
+- Provider-agnostic design supporting Anthropic API, AWS Bedrock, and Google Vertex AI
+
+## Provider Authentication
+
+1. **Anthropic API** (default): Requires API key via `anthropic_api_key` input
+2. **AWS Bedrock**: Uses OIDC authentication when `use_bedrock: true`
+3. **Google Vertex AI**: Uses OIDC authentication when `use_vertex: true`
+
+## Testing Strategy
+
+### Local Testing
+
+- Use `act` tool to run GitHub Actions workflows locally
+- `test-local.sh` script automates local testing setup
+- Requires `ANTHROPIC_API_KEY` environment variable
+
+### Test Structure
+
+- Unit tests for configuration logic
+- Integration tests for prompt preparation
+- Full workflow tests in `.github/workflows/test-action.yml`
+
+## Important Technical Details
+
+- Uses `mkfifo` to create named pipes for prompt input
+- Outputs execution logs as JSON to `/tmp/claude-execution-output.json`
+- Timeout enforcement via `timeout` command wrapper
+- Strict TypeScript configuration with Bun-specific settings
--- a/base-action/CODE_OF_CONDUCT.md
+++ b/base-action/CODE_OF_CONDUCT.md
@@ -0,0 +1,128 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, religion, or sexual identity
+and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our
+community include:
+
+- Demonstrating empathy and kindness toward other people
+- Being respectful of differing opinions, viewpoints, and experiences
+- Giving and gracefully accepting constructive feedback
+- Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+- Focusing on what is best not just for us as individuals, but for the
+  overall community
+
+Examples of unacceptable behavior include:
+
+- The use of sexualized language or imagery, and sexual attention or
+  advances of any kind
+- Trolling, insulting or derogatory comments, and personal or political attacks
+- Public or private harassment
+- Publishing others' private information, such as a physical or email
+  address, without their explicit permission
+- Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official e-mail address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the community leaders responsible for enforcement at
+claude-code-action-coc@anthropic.com.
+All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series
+of actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or
+permanent ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior, harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within
+the community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 2.0, available at
+https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.
+
+Community Impact Guidelines were inspired by [Mozilla's code of conduct
+enforcement ladder](https://github.com/mozilla/diversity).
+
+[homepage]: https://www.contributor-covenant.org
+
+For answers to common questions about this code of conduct, see the FAQ at
+https://www.contributor-covenant.org/faq. Translations are available at
+https://www.contributor-covenant.org/translations.
--- a/base-action/CONTRIBUTING.md
+++ b/base-action/CONTRIBUTING.md
@@ -0,0 +1,136 @@
+# Contributing to Claude Code Base Action
+
+Thank you for your interest in contributing to Claude Code Base Action! This document provides guidelines and instructions for contributing to the project.
+
+## Getting Started
+
+### Prerequisites
+
+- [Bun](https://bun.sh/) runtime
+- [Docker](https://www.docker.com/) (for running GitHub Actions locally)
+- [act](https://github.com/nektos/act) (installed automatically by our test script)
+- An Anthropic API key (for testing)
+
+### Setup
+
+1. Fork the repository on GitHub and clone your fork:
+
+   ```bash
+   git clone https://github.com/your-username/claude-code-base-action.git
+   cd claude-code-base-action
+   ```
+
+2. Install dependencies:
+
+   ```bash
+   bun install
+   ```
+
+3. Set up your Anthropic API key:
+   ```bash
+   export ANTHROPIC_API_KEY="your-api-key-here"
+   ```
+
+## Development
+
+### Available Scripts
+
+- `bun test` - Run all tests
+- `bun run typecheck` - Type check the code
+- `bun run format` - Format code with Prettier
+- `bun run format:check` - Check code formatting
+
+## Testing
+
+### Running Tests Locally
+
+1. **Unit Tests**:
+
+   ```bash
+   bun test
+   ```
+
+2. **Integration Tests** (using GitHub Actions locally):
+
+   ```bash
+   ./test-local.sh
+   ```
+
+   This script:
+
+   - Installs `act` if not present (requires Homebrew on macOS)
+   - Runs the GitHub Action workflow locally using Docker
+   - Requires your `ANTHROPIC_API_KEY` to be set
+
+   On Apple Silicon Macs, the script automatically adds the `--container-architecture linux/amd64` flag to avoid compatibility issues.
+
+## Pull Request Process
+
+1. Create a new branch from `main`:
+
+   ```bash
+   git checkout -b feature/your-feature-name
+   ```
+
+2. Make your changes and commit them:
+
+   ```bash
+   git add .
+   git commit -m "feat: add new feature"
+   ```
+
+3. Run tests and formatting:
+
+   ```bash
+   bun test
+   bun run typecheck
+   bun run format:check
+   ```
+
+4. Push your branch and create a Pull Request:
+
+   ```bash
+   git push origin feature/your-feature-name
+   ```
+
+5. Ensure all CI checks pass
+
+6. Request review from maintainers
+
+## Action Development
+
+### Testing Your Changes
+
+When modifying the action:
+
+1. Test locally with the test script:
+
+   ```bash
+   ./test-local.sh
+   ```
+
+2. Test in a real GitHub Actions workflow by:
+   - Creating a test repository
+   - Using your branch as the action source:
+     ```yaml
+     uses: your-username/claude-code-base-action@your-branch
+     ```
+
+### Debugging
+
+- Use `console.log` for debugging in development
+- Check GitHub Actions logs for runtime issues
+- Use `act` with `-v` flag for verbose output:
+  ```bash
+  act push -v --secret ANTHROPIC_API_KEY="$ANTHROPIC_API_KEY"
+  ```
+
+## Common Issues
+
+### Docker Issues
+
+Make sure Docker is running before using `act`. You can check with:
+
+```bash
+docker ps
+```
--- a/base-action/LICENSE
+++ b/base-action/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Anthropic, PBC
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
--- a/base-action/README.md
+++ b/base-action/README.md
@@ -0,0 +1,523 @@
+# Claude Code Base Action
+
+This GitHub Action allows you to run [Claude Code](https://www.anthropic.com/claude-code) within your GitHub Actions workflows. You can use this to build any custom workflow on top of Claude Code.
+
+For simply tagging @claude in issues and PRs out of the box, [check out the Claude Code action and GitHub app](https://github.com/anthropics/claude-code-action).
+
+## Usage
+
+Add the following to your workflow file:
+
+```yaml
+# Using a direct prompt
+- name: Run Claude Code with direct prompt
+  uses: anthropics/claude-code-base-action@beta
+  with:
+    prompt: "Your prompt here"
+    allowed_tools: "Bash(git:*),View,GlobTool,GrepTool,BatchTool"
+    anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+
+# Or using a prompt from a file
+- name: Run Claude Code with prompt file
+  uses: anthropics/claude-code-base-action@beta
+  with:
+    prompt_file: "/path/to/prompt.txt"
+    allowed_tools: "Bash(git:*),View,GlobTool,GrepTool,BatchTool"
+    anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+
+# Or limiting the conversation turns
+- name: Run Claude Code with limited turns
+  uses: anthropics/claude-code-base-action@beta
+  with:
+    prompt: "Your prompt here"
+    allowed_tools: "Bash(git:*),View,GlobTool,GrepTool,BatchTool"
+    max_turns: "5" # Limit conversation to 5 turns
+    anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+
+# Using custom system prompts
+- name: Run Claude Code with custom system prompt
+  uses: anthropics/claude-code-base-action@beta
+  with:
+    prompt: "Build a REST API"
+    system_prompt: "You are a senior backend engineer. Focus on security, performance, and maintainability."
+    allowed_tools: "Bash(git:*),View,GlobTool,GrepTool,BatchTool"
+    anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+
+# Or appending to the default system prompt
+- name: Run Claude Code with appended system prompt
+  uses: anthropics/claude-code-base-action@beta
+  with:
+    prompt: "Create a database schema"
+    append_system_prompt: "After writing code, be sure to code review yourself."
+    allowed_tools: "Bash(git:*),View,GlobTool,GrepTool,BatchTool"
+    anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+
+# Using custom environment variables
+- name: Run Claude Code with custom environment variables
+  uses: anthropics/claude-code-base-action@beta
+  with:
+    prompt: "Deploy to staging environment"
+    claude_env: |
+      ENVIRONMENT: staging
+      API_URL: https://api-staging.example.com
+      DEBUG: true
+    allowed_tools: "Bash(git:*),View,GlobTool,GrepTool,BatchTool"
+    anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+
+# Using fallback model for handling API errors
+- name: Run Claude Code with fallback model
+  uses: anthropics/claude-code-base-action@beta
+  with:
+    prompt: "Review and fix TypeScript errors"
+    model: "claude-opus-4-20250514"
+    fallback_model: "claude-sonnet-4-20250514"
+    allowed_tools: "Bash(git:*),View,GlobTool,GrepTool,BatchTool"
+    anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+
+# Using OAuth token instead of API key
+- name: Run Claude Code with OAuth token
+  uses: anthropics/claude-code-base-action@beta
+  with:
+    prompt: "Update dependencies"
+    allowed_tools: "Bash(git:*),View,GlobTool,GrepTool,BatchTool"
+    claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
+```
+
+## Inputs
+
+| Input                     | Description                                                                                       | Required | Default                      |
+| ------------------------- | ------------------------------------------------------------------------------------------------- | -------- | ---------------------------- |
+| `prompt`                  | The prompt to send to Claude Code                                                                 | No\*     | ''                           |
+| `prompt_file`             | Path to a file containing the prompt to send to Claude Code                                       | No\*     | ''                           |
+| `allowed_tools`           | Comma-separated list of allowed tools for Claude Code to use                                      | No       | ''                           |
+| `disallowed_tools`        | Comma-separated list of disallowed tools that Claude Code cannot use                              | No       | ''                           |
+| `max_turns`               | Maximum number of conversation turns (default: no limit)                                          | No       | ''                           |
+| `mcp_config`              | Path to the MCP configuration JSON file, or MCP configuration JSON string                         | No       | ''                           |
+| `settings`                | Path to Claude Code settings JSON file, or settings JSON string                                   | No       | ''                           |
+| `system_prompt`           | Override system prompt                                                                            | No       | ''                           |
+| `append_system_prompt`    | Append to system prompt                                                                           | No       | ''                           |
+| `claude_env`              | Custom environment variables to pass to Claude Code execution (YAML multiline format)             | No       | ''                           |
+| `model`                   | Model to use (provider-specific format required for Bedrock/Vertex)                               | No       | 'claude-4-0-sonnet-20250219' |
+| `anthropic_model`         | DEPRECATED: Use 'model' instead                                                                   | No       | 'claude-4-0-sonnet-20250219' |
+| `fallback_model`          | Enable automatic fallback to specified model when default model is overloaded                     | No       | ''                           |
+| `timeout_minutes`         | Timeout in minutes for Claude Code execution                                                      | No       | '10'                         |
+| `anthropic_api_key`       | Anthropic API key (required for direct Anthropic API)                                             | No       | ''                           |
+| `claude_code_oauth_token` | Claude Code OAuth token (alternative to anthropic_api_key)                                        | No       | ''                           |
+| `use_bedrock`             | Use Amazon Bedrock with OIDC authentication instead of direct Anthropic API                       | No       | 'false'                      |
+| `use_vertex`              | Use Google Vertex AI with OIDC authentication instead of direct Anthropic API                     | No       | 'false'                      |
+| `use_node_cache`          | Whether to use Node.js dependency caching (set to true only for Node.js projects with lock files) | No       | 'false'                      |
+
+\*Either `prompt` or `prompt_file` must be provided, but not both.
+
+## Outputs
+
+| Output           | Description                                                |
+| ---------------- | ---------------------------------------------------------- |
+| `conclusion`     | Execution status of Claude Code ('success' or 'failure')   |
+| `execution_file` | Path to the JSON file containing Claude Code execution log |
+
+## Environment Variables
+
+The following environment variables can be used to configure the action:
+
+| Variable       | Description                                           | Default |
+| -------------- | ----------------------------------------------------- | ------- |
+| `NODE_VERSION` | Node.js version to use (e.g., '18.x', '20.x', '22.x') | '18.x'  |
+
+Example usage:
+
+```yaml
+- name: Run Claude Code with Node.js 20
+  uses: anthropics/claude-code-base-action@beta
+  env:
+    NODE_VERSION: "20.x"
+  with:
+    prompt: "Your prompt here"
+    anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+```
+
+## Custom Environment Variables
+
+You can pass custom environment variables to Claude Code execution using the `claude_env` input. This allows Claude to access environment-specific configuration during its execution.
+
+The `claude_env` input accepts YAML multiline format with key-value pairs:
+
+```yaml
+- name: Deploy with custom environment
+  uses: anthropics/claude-code-base-action@beta
+  with:
+    prompt: "Deploy the application to the staging environment"
+    claude_env: |
+      ENVIRONMENT: staging
+      API_BASE_URL: https://api-staging.example.com
+      DATABASE_URL: ${{ secrets.STAGING_DB_URL }}
+      DEBUG: true
+      LOG_LEVEL: debug
+    allowed_tools: "Bash(git:*),View,GlobTool,GrepTool,BatchTool"
+    anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+```
+
+### Features:
+
+- **YAML Format**: Use standard YAML key-value syntax (`KEY: value`)
+- **Multiline Support**: Define multiple environment variables in a single input
+- **Comments**: Lines starting with `#` are ignored
+- **GitHub Secrets**: Can reference GitHub secrets using `${{ secrets.SECRET_NAME }}`
+- **Runtime Access**: Environment variables are available to Claude during execution
+
+### Example Use Cases:
+
+```yaml
+# Development configuration
+claude_env: |
+  NODE_ENV: development
+  API_URL: http://localhost:3000
+  DEBUG: true
+
+# Production deployment
+claude_env: |
+  NODE_ENV: production
+  API_URL: https://api.example.com
+  DATABASE_URL: ${{ secrets.PROD_DB_URL }}
+  REDIS_URL: ${{ secrets.REDIS_URL }}
+
+# Feature flags and configuration
+claude_env: |
+  FEATURE_NEW_UI: enabled
+  MAX_RETRIES: 3
+  TIMEOUT_MS: 5000
+```
+
+## Using Settings Configuration
+
+You can provide Claude Code settings configuration in two ways:
+
+### Option 1: Settings Configuration File
+
+Provide a path to a JSON file containing Claude Code settings:
+
+```yaml
+- name: Run Claude Code with settings file
+  uses: anthropics/claude-code-base-action@beta
+  with:
+    prompt: "Your prompt here"
+    settings: "path/to/settings.json"
+    allowed_tools: "Bash(git:*),View,GlobTool,GrepTool,BatchTool"
+    anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+```
+
+### Option 2: Inline Settings Configuration
+
+Provide the settings configuration directly as a JSON string:
+
+```yaml
+- name: Run Claude Code with inline settings
+  uses: anthropics/claude-code-base-action@beta
+  with:
+    prompt: "Your prompt here"
+    settings: |
+      {
+        "model": "claude-opus-4-20250514",
+        "env": {
+          "DEBUG": "true",
+          "API_URL": "https://api.example.com"
+        },
+        "permissions": {
+          "allow": ["Bash", "Read"],
+          "deny": ["WebFetch"]
+        },
+        "hooks": {
+          "PreToolUse": [{
+            "matcher": "Bash",
+            "hooks": [{
+              "type": "command",
+              "command": "echo Running bash command..."
+            }]
+          }]
+        }
+      }
+    allowed_tools: "Bash(git:*),View,GlobTool,GrepTool,BatchTool"
+    anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+```
+
+The settings file supports all Claude Code settings options including:
+
+- `model`: Override the default model
+- `env`: Environment variables for the session
+- `permissions`: Tool usage permissions
+- `hooks`: Pre/post tool execution hooks
+- `includeCoAuthoredBy`: Include co-authored-by in git commits
+- And more...
+
+**Note**: The `enableAllProjectMcpServers` setting is always set to `true` by this action to ensure MCP servers work correctly.
+
+## Using MCP Config
+
+You can provide MCP configuration in two ways:
+
+### Option 1: MCP Configuration File
+
+Provide a path to a JSON file containing MCP configuration:
+
+```yaml
+- name: Run Claude Code with MCP config file
+  uses: anthropics/claude-code-base-action@beta
+  with:
+    prompt: "Your prompt here"
+    mcp_config: "path/to/mcp-config.json"
+    allowed_tools: "Bash(git:*),View,GlobTool,GrepTool,BatchTool"
+    anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+```
+
+### Option 2: Inline MCP Configuration
+
+Provide the MCP configuration directly as a JSON string:
+
+```yaml
+- name: Run Claude Code with inline MCP config
+  uses: anthropics/claude-code-base-action@beta
+  with:
+    prompt: "Your prompt here"
+    mcp_config: |
+      {
+        "mcpServers": {
+          "server-name": {
+            "command": "node",
+            "args": ["./server.js"],
+            "env": {
+              "API_KEY": "your-api-key"
+            }
+          }
+        }
+      }
+    allowed_tools: "Bash(git:*),View,GlobTool,GrepTool,BatchTool"
+    anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+```
+
+The MCP config file should follow this format:
+
+```json
+{
+  "mcpServers": {
+    "server-name": {
+      "command": "node",
+      "args": ["./server.js"],
+      "env": {
+        "API_KEY": "your-api-key"
+      }
+    }
+  }
+}
+```
+
+You can combine MCP config with other inputs like allowed tools:
+
+```yaml
+# Using multiple inputs together
+- name: Run Claude Code with MCP and custom tools
+  uses: anthropics/claude-code-base-action@beta
+  with:
+    prompt: "Access the custom MCP server and use its tools"
+    mcp_config: "mcp-config.json"
+    allowed_tools: "Bash(git:*),View,mcp__server-name__custom_tool"
+    timeout_minutes: "15"
+    anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+```
+
+## Example: PR Code Review
+
+```yaml
+name: Claude Code Review
+
+on:
+  pull_request:
+    types: [opened, synchronize]
+
+jobs:
+  code-review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Run Code Review with Claude
+        id: code-review
+        uses: anthropics/claude-code-base-action@beta
+        with:
+          prompt: "Review the PR changes. Focus on code quality, potential bugs, and performance issues. Suggest improvements where appropriate. Write your review as markdown text."
+          allowed_tools: "Bash(git diff --name-only HEAD~1),Bash(git diff HEAD~1),View,GlobTool,GrepTool,Write"
+          anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+
+      - name: Extract and Comment PR Review
+        if: steps.code-review.outputs.conclusion == 'success'
+        uses: actions/github-script@v7
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            const fs = require('fs');
+            const executionFile = '${{ steps.code-review.outputs.execution_file }}';
+            const executionLog = JSON.parse(fs.readFileSync(executionFile, 'utf8'));
+
+            // Extract the review content from the execution log
+            // The execution log contains the full conversation including Claude's responses
+            let review = '';
+
+            // Find the last assistant message which should contain the review
+            for (let i = executionLog.length - 1; i >= 0; i--) {
+              if (executionLog[i].role === 'assistant') {
+                review = executionLog[i].content;
+                break;
+              }
+            }
+
+            if (review) {
+              github.rest.issues.createComment({
+                issue_number: context.issue.number,
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                body: "## Claude Code Review\n\n" + review + "\n\n*Generated by Claude Code*"
+              });
+            }
+```
+
+Check out additional examples in [`./examples`](./examples).
+
+## Using Cloud Providers
+
+You can authenticate with Claude using any of these methods:
+
+1. Direct Anthropic API (default) - requires API key or OAuth token
+2. Amazon Bedrock - requires OIDC authentication and automatically uses cross-region inference profiles
+3. Google Vertex AI - requires OIDC authentication
+
+**Note**:
+
+- Bedrock and Vertex use OIDC authentication exclusively
+- AWS Bedrock automatically uses cross-region inference profiles for certain models
+- For cross-region inference profile models, you need to request and be granted access to the Claude models in all regions that the inference profile uses
+- The Bedrock API endpoint URL is automatically constructed using the AWS_REGION environment variable (e.g., `https://bedrock-runtime.us-west-2.amazonaws.com`)
+- You can override the Bedrock API endpoint URL by setting the `ANTHROPIC_BEDROCK_BASE_URL` environment variable
+
+### Model Configuration
+
+Use provider-specific model names based on your chosen provider:
+
+```yaml
+# For direct Anthropic API (default)
+- name: Run Claude Code with Anthropic API
+  uses: anthropics/claude-code-base-action@beta
+  with:
+    prompt: "Your prompt here"
+    model: "claude-3-7-sonnet-20250219"
+    anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+
+# For Amazon Bedrock (requires OIDC authentication)
+- name: Configure AWS Credentials (OIDC)
+  uses: aws-actions/configure-aws-credentials@v4
+  with:
+    role-to-assume: ${{ secrets.AWS_ROLE_TO_ASSUME }}
+    aws-region: us-west-2
+
+- name: Run Claude Code with Bedrock
+  uses: anthropics/claude-code-base-action@beta
+  with:
+    prompt: "Your prompt here"
+    model: "anthropic.claude-3-7-sonnet-20250219-v1:0"
+    use_bedrock: "true"
+
+# For Google Vertex AI (requires OIDC authentication)
+- name: Authenticate to Google Cloud
+  uses: google-github-actions/auth@v2
+  with:
+    workload_identity_provider: ${{ secrets.GCP_WORKLOAD_IDENTITY_PROVIDER }}
+    service_account: ${{ secrets.GCP_SERVICE_ACCOUNT }}
+
+- name: Run Claude Code with Vertex AI
+  uses: anthropics/claude-code-base-action@beta
+  with:
+    prompt: "Your prompt here"
+    model: "claude-3-7-sonnet@20250219"
+    use_vertex: "true"
+```
+
+## Example: Using OIDC Authentication for AWS Bedrock
+
+This example shows how to use OIDC authentication with AWS Bedrock:
+
+```yaml
+- name: Configure AWS Credentials (OIDC)
+  uses: aws-actions/configure-aws-credentials@v4
+  with:
+    role-to-assume: ${{ secrets.AWS_ROLE_TO_ASSUME }}
+    aws-region: us-west-2
+
+- name: Run Claude Code with AWS OIDC
+  uses: anthropics/claude-code-base-action@beta
+  with:
+    prompt: "Your prompt here"
+    use_bedrock: "true"
+    model: "anthropic.claude-3-7-sonnet-20250219-v1:0"
+    allowed_tools: "Bash(git:*),View,GlobTool,GrepTool,BatchTool"
+```
+
+## Example: Using OIDC Authentication for GCP Vertex AI
+
+This example shows how to use OIDC authentication with GCP Vertex AI:
+
+```yaml
+- name: Authenticate to Google Cloud
+  uses: google-github-actions/auth@v2
+  with:
+    workload_identity_provider: ${{ secrets.GCP_WORKLOAD_IDENTITY_PROVIDER }}
+    service_account: ${{ secrets.GCP_SERVICE_ACCOUNT }}
+
+- name: Run Claude Code with GCP OIDC
+  uses: anthropics/claude-code-base-action@beta
+  with:
+    prompt: "Your prompt here"
+    use_vertex: "true"
+    model: "claude-3-7-sonnet@20250219"
+    allowed_tools: "Bash(git:*),View,GlobTool,GrepTool,BatchTool"
+```
+
+## Security Best Practices
+
+**⚠️ IMPORTANT: Never commit API keys directly to your repository! Always use GitHub Actions secrets.**
+
+To securely use your Anthropic API key:
+
+1. Add your API key as a repository secret:
+
+   - Go to your repository's Settings
+   - Navigate to "Secrets and variables" → "Actions"
+   - Click "New repository secret"
+   - Name it `ANTHROPIC_API_KEY`
+   - Paste your API key as the value
+
+2. Reference the secret in your workflow:
+   ```yaml
+   anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+   ```
+
+**Never do this:**
+
+```yaml
+# ❌ WRONG - Exposes your API key
+anthropic_api_key: "sk-ant-..."
+```
+
+**Always do this:**
+
+```yaml
+# ✅ CORRECT - Uses GitHub secrets
+anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+```
+
+This applies to all sensitive values including API keys, access tokens, and credentials.
+We also recommend that you always use short-lived tokens when possible
+
+## License
+
+This project is licensed under the MIT License—see the LICENSE file for details.
--- a/base-action/action.yml
+++ b/base-action/action.yml
@@ -0,0 +1,166 @@
+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"
+
+  # 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"
+
+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
+      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 ${GITHUB_ACTION_PATH}
+        bun install
+
+    - name: Install Claude Code
+      shell: bash
+      run: npm install -g @anthropic-ai/claude-code@1.0.53
+
+    - name: Run Claude Code Action
+      shell: bash
+      id: run_claude
+      run: |
+        # Change to CLAUDE_WORKING_DIR if set (for running in custom directories)
+        if [ -n "$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 }}
+
+        # 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 }}
--- a/base-action/bun.lock
+++ b/base-action/bun.lock
@@ -0,0 +1,44 @@
+{
+  "lockfileVersion": 1,
+  "workspaces": {
+    "": {
+      "name": "@anthropic-ai/claude-code-base-action",
+      "dependencies": {
+        "@actions/core": "^1.10.1",
+      },
+      "devDependencies": {
+        "@types/bun": "^1.2.12",
+        "@types/node": "^20.0.0",
+        "prettier": "3.5.3",
+        "typescript": "^5.8.3",
+      },
+    },
+  },
+  "packages": {
+    "@actions/core": ["@actions/core@1.11.1", "", { "dependencies": { "@actions/exec": "^1.1.1", "@actions/http-client": "^2.0.1" } }, "sha512-hXJCSrkwfA46Vd9Z3q4cpEpHB1rL5NG04+/rbqW9d3+CSvtB1tYe8UTpAlixa1vj0m/ULglfEK2UKxMGxCxv5A=="],
+
+    "@actions/exec": ["@actions/exec@1.1.1", "", { "dependencies": { "@actions/io": "^1.0.1" } }, "sha512-+sCcHHbVdk93a0XT19ECtO/gIXoxvdsgQLzb2fE2/5sIZmWQuluYyjPQtrtTHdU1YzTZ7bAPN4sITq2xi1679w=="],
+
+    "@actions/http-client": ["@actions/http-client@2.2.3", "", { "dependencies": { "tunnel": "^0.0.6", "undici": "^5.25.4" } }, "sha512-mx8hyJi/hjFvbPokCg4uRd4ZX78t+YyRPtnKWwIl+RzNaVuFpQHfmlGVfsKEJN8LwTCvL+DfVgAM04XaHkm6bA=="],
+
+    "@actions/io": ["@actions/io@1.1.3", "", {}, "sha512-wi9JjgKLYS7U/z8PPbco+PvTb/nRWjeoFlJ1Qer83k/3C5PHQi28hiVdeE2kHXmIL99mQFawx8qt/JPjZilJ8Q=="],
+
+    "@fastify/busboy": ["@fastify/busboy@2.1.1", "", {}, "sha512-vBZP4NlzfOlerQTnba4aqZoMhE/a9HY7HRqoOPaETQcSQuWEIyZMHGfVu6w9wGtGK5fED5qRs2DteVCjOH60sA=="],
+
+    "@types/bun": ["@types/bun@1.2.12", "", { "dependencies": { "bun-types": "1.2.12" } }, "sha512-lY/GQTXDGsolT/TiH72p1tuyUORuRrdV7VwOTOjDOt8uTBJQOJc5zz3ufwwDl0VBaoxotSk4LdP0hhjLJ6ypIQ=="],
+
+    "@types/node": ["@types/node@20.17.32", "", { "dependencies": { "undici-types": "~6.19.2" } }, "sha512-zeMXFn8zQ+UkjK4ws0RiOC9EWByyW1CcVmLe+2rQocXRsGEDxUCwPEIVgpsGcLHS/P8JkT0oa3839BRABS0oPw=="],
+
+    "bun-types": ["bun-types@1.2.12", "", { "dependencies": { "@types/node": "*" } }, "sha512-tvWMx5vPqbRXgE8WUZI94iS1xAYs8bkqESR9cxBB1Wi+urvfTrF1uzuDgBHFAdO0+d2lmsbG3HmeKMvUyj6pWA=="],
+
+    "prettier": ["prettier@3.5.3", "", { "bin": "bin/prettier.cjs" }, "sha512-QQtaxnoDJeAkDvDKWCLiwIXkTgRhwYDEQCghU9Z6q03iyek/rxRh/2lC3HB7P8sWT2xC/y5JDctPLBIGzHKbhw=="],
+
+    "tunnel": ["tunnel@0.0.6", "", {}, "sha512-1h/Lnq9yajKY2PEbBadPXj3VxsDDu844OnaAo52UVmIzIvwwtBPIuNvkjuzBlTWpfJyUbG3ez0KSBibQkj4ojg=="],
+
+    "typescript": ["typescript@5.8.3", "", { "bin": { "tsc": "bin/tsc", "tsserver": "bin/tsserver" } }, "sha512-p1diW6TqL9L07nNxvRMM7hMMw4c5XOo/1ibL4aAIGmSAt9slTE1Xgw5KWuof2uTOvCg9BY7ZRi+GaF+7sfgPeQ=="],
+
+    "undici": ["undici@5.29.0", "", { "dependencies": { "@fastify/busboy": "^2.0.0" } }, "sha512-raqeBD6NQK4SkWhQzeYKd1KmIG6dllBOTt55Rmkt4HtI9mwdWtJljnrXjAFUBLTSN67HWrOIZ3EPF4kjUw80Bg=="],
+
+    "undici-types": ["undici-types@6.19.8", "", {}, "sha512-ve2KP6f/JnbPBFyobGHuerC9g1FYGn/F8n1LWTwNxCEzd6IfqTwUQcNXgEtmmQ6DlRrC1hrSrBnCZPokRrDHjw=="],
+  }
+}
--- a/base-action/examples/issue-triage.yml
+++ b/base-action/examples/issue-triage.yml
@@ -0,0 +1,108 @@
+name: Claude Issue Triage Example
+description: Run Claude Code for issue triage in GitHub Actions
+on:
+  issues:
+    types: [opened]
+
+jobs:
+  triage-issue:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    permissions:
+      contents: read
+      issues: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup GitHub MCP Server
+        run: |
+          mkdir -p /tmp/mcp-config
+          cat > /tmp/mcp-config/mcp-servers.json << 'EOF'
+          {
+            "mcpServers": {
+              "github": {
+                "command": "docker",
+                "args": [
+                  "run",
+                  "-i",
+                  "--rm",
+                  "-e",
+                  "GITHUB_PERSONAL_ACCESS_TOKEN",
+                  "ghcr.io/github/github-mcp-server:sha-7aced2b"
+                ],
+                "env": {
+                  "GITHUB_PERSONAL_ACCESS_TOKEN": "${{ secrets.GITHUB_TOKEN }}"
+                }
+              }
+            }
+          }
+          EOF
+
+      - name: Create triage prompt
+        run: |
+          mkdir -p /tmp/claude-prompts
+          cat > /tmp/claude-prompts/triage-prompt.txt << 'EOF'
+          You're an issue triage assistant for GitHub issues. Your task is to analyze the issue and select appropriate labels from the provided list.
+
+          IMPORTANT: Don't post any comments or messages to the issue. Your only action should be to apply labels.
+
+          Issue Information:
+          - REPO: ${GITHUB_REPOSITORY}
+          - ISSUE_NUMBER: ${{ github.event.issue.number }}
+
+          TASK OVERVIEW:
+
+          1. First, fetch the list of labels available in this repository by running: `gh label list`. Run exactly this command with nothing else.
+
+          2. Next, use the GitHub tools to get context about the issue:
+             - You have access to these tools:
+               - mcp__github__get_issue: Use this to retrieve the current issue's details including title, description, and existing labels
+               - mcp__github__get_issue_comments: Use this to read any discussion or additional context provided in the comments
+               - mcp__github__update_issue: Use this to apply labels to the issue (do not use this for commenting)
+               - mcp__github__search_issues: Use this to find similar issues that might provide context for proper categorization and to identify potential duplicate issues
+               - mcp__github__list_issues: Use this to understand patterns in how other issues are labeled
+             - Start by using mcp__github__get_issue to get the issue details
+
+          3. Analyze the issue content, considering:
+             - The issue title and description
+             - The type of issue (bug report, feature request, question, etc.)
+             - Technical areas mentioned
+             - Severity or priority indicators
+             - User impact
+             - Components affected
+
+          4. Select appropriate labels from the available labels list provided above:
+             - Choose labels that accurately reflect the issue's nature
+             - Be specific but comprehensive
+             - Select priority labels if you can determine urgency (high-priority, med-priority, or low-priority)
+             - Consider platform labels (android, ios) if applicable
+             - If you find similar issues using mcp__github__search_issues, consider using a "duplicate" label if appropriate. Only do so if the issue is a duplicate of another OPEN issue.
+
+          5. Apply the selected labels:
+             - Use mcp__github__update_issue to apply your selected labels
+             - DO NOT post any comments explaining your decision
+             - DO NOT communicate directly with users
+             - If no labels are clearly applicable, do not apply any labels
+
+          IMPORTANT GUIDELINES:
+          - Be thorough in your analysis
+          - Only select labels from the provided list above
+          - DO NOT post any comments to the issue
+          - Your ONLY action should be to apply labels using mcp__github__update_issue
+          - It's okay to not add any labels if none are clearly applicable
+          EOF
+        env:
+          GITHUB_REPOSITORY: ${{ github.repository }}
+
+      - name: Run Claude Code for Issue Triage
+        uses: anthropics/claude-code-base-action@beta
+        with:
+          prompt_file: /tmp/claude-prompts/triage-prompt.txt
+          allowed_tools: "Bash(gh label list),mcp__github__get_issue,mcp__github__get_issue_comments,mcp__github__update_issue,mcp__github__search_issues,mcp__github__list_issues"
+          mcp_config: /tmp/mcp-config/mcp-servers.json
+          timeout_minutes: "5"
+          anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
--- a/base-action/package.json
+++ b/base-action/package.json
@@ -0,0 +1,21 @@
+{
+  "name": "@anthropic-ai/claude-code-base-action",
+  "version": "1.0.0",
+  "private": true,
+  "scripts": {
+    "format": "prettier --write .",
+    "format:check": "prettier --check .",
+    "install-hooks": "bun run scripts/install-hooks.sh",
+    "test": "bun test",
+    "typecheck": "tsc --noEmit"
+  },
+  "dependencies": {
+    "@actions/core": "^1.10.1"
+  },
+  "devDependencies": {
+    "@types/bun": "^1.2.12",
+    "@types/node": "^20.0.0",
+    "prettier": "3.5.3",
+    "typescript": "^5.8.3"
+  }
+}
--- a/base-action/scripts/install-hooks.sh
+++ b/base-action/scripts/install-hooks.sh
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+# Install git hooks
+echo "Installing git hooks..."
+
+# Make sure hooks directory exists
+mkdir -p .git/hooks
+
+# Install pre-push hook
+cp scripts/pre-push .git/hooks/pre-push
+chmod +x .git/hooks/pre-push
+
+echo "Git hooks installed successfully!"
--- a/base-action/scripts/pre-push
+++ b/base-action/scripts/pre-push
@@ -0,0 +1,46 @@
+#!/bin/sh
+
+# Check if files need formatting before push
+echo "Checking code formatting..."
+
+# First check if any files need formatting
+if ! bun run format:check; then
+    echo "Code formatting errors found. Running formatter..."
+    bun run format
+
+    # Check if there are any staged changes after formatting
+    if git diff --name-only --exit-code; then
+        echo "All files are now properly formatted."
+    else
+        echo ""
+        echo "ERROR: Code has been formatted but changes need to be committed!"
+        echo "Please commit the formatted files and try again."
+        echo ""
+        echo "The following files were modified:"
+        git diff --name-only
+        echo ""
+        exit 1
+    fi
+else
+    echo "Code formatting is already correct."
+fi
+
+# Run type checking
+echo "Running type checking..."
+if ! bun run typecheck; then
+    echo "Type checking failed. Please fix the type errors and try again."
+    exit 1
+else
+    echo "Type checking passed."
+fi
+
+# Run tests
+echo "Running tests..."
+if ! bun run test; then
+    echo "Tests failed. Please fix the failing tests and try again."
+    exit 1
+else
+    echo "All tests passed."
+fi
+
+exit 0
--- a/base-action/src/index.ts
+++ b/base-action/src/index.ts
@@ -0,0 +1,39 @@
+#!/usr/bin/env bun
+
+import * as core from "@actions/core";
+import { preparePrompt } from "./prepare-prompt";
+import { runClaude } from "./run-claude";
+import { setupClaudeCodeSettings } from "./setup-claude-code-settings";
+import { validateEnvironmentVariables } from "./validate-env";
+
+async function run() {
+  try {
+    validateEnvironmentVariables();
+
+    await setupClaudeCodeSettings(process.env.INPUT_SETTINGS);
+
+    const promptConfig = await preparePrompt({
+      prompt: process.env.INPUT_PROMPT || "",
+      promptFile: process.env.INPUT_PROMPT_FILE || "",
+    });
+
+    await runClaude(promptConfig.path, {
+      allowedTools: process.env.INPUT_ALLOWED_TOOLS,
+      disallowedTools: process.env.INPUT_DISALLOWED_TOOLS,
+      maxTurns: process.env.INPUT_MAX_TURNS,
+      mcpConfig: process.env.INPUT_MCP_CONFIG,
+      systemPrompt: process.env.INPUT_SYSTEM_PROMPT,
+      appendSystemPrompt: process.env.INPUT_APPEND_SYSTEM_PROMPT,
+      claudeEnv: process.env.INPUT_CLAUDE_ENV,
+      fallbackModel: process.env.INPUT_FALLBACK_MODEL,
+    });
+  } catch (error) {
+    core.setFailed(`Action failed with error: ${error}`);
+    core.setOutput("conclusion", "failure");
+    process.exit(1);
+  }
+}
+
+if (import.meta.main) {
+  run();
+}
--- a/base-action/src/prepare-prompt.ts
+++ b/base-action/src/prepare-prompt.ts
@@ -0,0 +1,82 @@
+import { existsSync, statSync } from "fs";
+import { mkdir, writeFile } from "fs/promises";
+
+export type PreparePromptInput = {
+  prompt: string;
+  promptFile: string;
+};
+
+export type PreparePromptConfig = {
+  type: "file" | "inline";
+  path: string;
+};
+
+async function validateAndPreparePrompt(
+  input: PreparePromptInput,
+): Promise<PreparePromptConfig> {
+  // Validate inputs
+  if (!input.prompt && !input.promptFile) {
+    throw new Error(
+      "Neither 'prompt' nor 'prompt_file' was provided. At least one is required.",
+    );
+  }
+
+  if (input.prompt && input.promptFile) {
+    throw new Error(
+      "Both 'prompt' and 'prompt_file' were provided. Please specify only one.",
+    );
+  }
+
+  // Handle prompt file
+  if (input.promptFile) {
+    if (!existsSync(input.promptFile)) {
+      throw new Error(`Prompt file '${input.promptFile}' does not exist.`);
+    }
+
+    // Validate that the file is not empty
+    const stats = statSync(input.promptFile);
+    if (stats.size === 0) {
+      throw new Error(
+        "Prompt file is empty. Please provide a non-empty prompt.",
+      );
+    }
+
+    return {
+      type: "file",
+      path: input.promptFile,
+    };
+  }
+
+  // Handle inline prompt
+  if (!input.prompt || input.prompt.trim().length === 0) {
+    throw new Error("Prompt is empty. Please provide a non-empty prompt.");
+  }
+
+  const inlinePath = "/tmp/claude-action/prompt.txt";
+  return {
+    type: "inline",
+    path: inlinePath,
+  };
+}
+
+async function createTemporaryPromptFile(
+  prompt: string,
+  promptPath: string,
+): Promise<void> {
+  // Create the directory path
+  const dirPath = promptPath.substring(0, promptPath.lastIndexOf("/"));
+  await mkdir(dirPath, { recursive: true });
+  await writeFile(promptPath, prompt);
+}
+
+export async function preparePrompt(
+  input: PreparePromptInput,
+): Promise<PreparePromptConfig> {
+  const config = await validateAndPreparePrompt(input);
+
+  if (config.type === "inline") {
+    await createTemporaryPromptFile(input.prompt, config.path);
+  }
+
+  return config;
+}
--- a/base-action/src/run-claude.ts
+++ b/base-action/src/run-claude.ts
@@ -0,0 +1,327 @@
+import * as core from "@actions/core";
+import { exec } from "child_process";
+import { promisify } from "util";
+import { unlink, writeFile, stat } from "fs/promises";
+import { createWriteStream } from "fs";
+import { spawn } from "child_process";
+
+const execAsync = promisify(exec);
+
+const PIPE_PATH = `${process.env.RUNNER_TEMP}/claude_prompt_pipe`;
+const EXECUTION_FILE = `${process.env.RUNNER_TEMP}/claude-execution-output.json`;
+const BASE_ARGS = ["-p", "--verbose", "--output-format", "stream-json"];
+
+export type ClaudeOptions = {
+  allowedTools?: string;
+  disallowedTools?: string;
+  maxTurns?: string;
+  mcpConfig?: string;
+  systemPrompt?: string;
+  appendSystemPrompt?: string;
+  claudeEnv?: string;
+  fallbackModel?: string;
+  timeoutMinutes?: string;
+};
+
+type PreparedConfig = {
+  claudeArgs: string[];
+  promptPath: string;
+  env: Record<string, string>;
+};
+
+function parseCustomEnvVars(claudeEnv?: string): Record<string, string> {
+  if (!claudeEnv || claudeEnv.trim() === "") {
+    return {};
+  }
+
+  const customEnv: Record<string, string> = {};
+
+  // Split by lines and parse each line as KEY: VALUE
+  const lines = claudeEnv.split("\n");
+
+  for (const line of lines) {
+    const trimmedLine = line.trim();
+    if (trimmedLine === "" || trimmedLine.startsWith("#")) {
+      continue; // Skip empty lines and comments
+    }
+
+    const colonIndex = trimmedLine.indexOf(":");
+    if (colonIndex === -1) {
+      continue; // Skip lines without colons
+    }
+
+    const key = trimmedLine.substring(0, colonIndex).trim();
+    const value = trimmedLine.substring(colonIndex + 1).trim();
+
+    if (key) {
+      customEnv[key] = value;
+    }
+  }
+
+  return customEnv;
+}
+
+export function prepareRunConfig(
+  promptPath: string,
+  options: ClaudeOptions,
+): PreparedConfig {
+  const claudeArgs = [...BASE_ARGS];
+
+  if (options.allowedTools) {
+    claudeArgs.push("--allowedTools", options.allowedTools);
+  }
+  if (options.disallowedTools) {
+    claudeArgs.push("--disallowedTools", options.disallowedTools);
+  }
+  if (options.maxTurns) {
+    const maxTurnsNum = parseInt(options.maxTurns, 10);
+    if (isNaN(maxTurnsNum) || maxTurnsNum <= 0) {
+      throw new Error(
+        `maxTurns must be a positive number, got: ${options.maxTurns}`,
+      );
+    }
+    claudeArgs.push("--max-turns", options.maxTurns);
+  }
+  if (options.mcpConfig) {
+    claudeArgs.push("--mcp-config", options.mcpConfig);
+  }
+  if (options.systemPrompt) {
+    claudeArgs.push("--system-prompt", options.systemPrompt);
+  }
+  if (options.appendSystemPrompt) {
+    claudeArgs.push("--append-system-prompt", options.appendSystemPrompt);
+  }
+  if (options.fallbackModel) {
+    claudeArgs.push("--fallback-model", options.fallbackModel);
+  }
+  if (options.timeoutMinutes) {
+    const timeoutMinutesNum = parseInt(options.timeoutMinutes, 10);
+    if (isNaN(timeoutMinutesNum) || timeoutMinutesNum <= 0) {
+      throw new Error(
+        `timeoutMinutes must be a positive number, got: ${options.timeoutMinutes}`,
+      );
+    }
+  }
+
+  // Parse custom environment variables
+  const customEnv = parseCustomEnvVars(options.claudeEnv);
+
+  return {
+    claudeArgs,
+    promptPath,
+    env: customEnv,
+  };
+}
+
+export async function runClaude(promptPath: string, options: ClaudeOptions) {
+  const config = prepareRunConfig(promptPath, options);
+
+  // Create a named pipe
+  try {
+    await unlink(PIPE_PATH);
+  } catch (e) {
+    // Ignore if file doesn't exist
+  }
+
+  // Create the named pipe
+  await execAsync(`mkfifo "${PIPE_PATH}"`);
+
+  // Log prompt file size
+  let promptSize = "unknown";
+  try {
+    const stats = await stat(config.promptPath);
+    promptSize = stats.size.toString();
+  } catch (e) {
+    // Ignore error
+  }
+
+  console.log(`Prompt file size: ${promptSize} bytes`);
+
+  // Log custom environment variables if any
+  if (Object.keys(config.env).length > 0) {
+    const envKeys = Object.keys(config.env).join(", ");
+    console.log(`Custom environment variables: ${envKeys}`);
+  }
+
+  // Output to console
+  console.log(`Running Claude with prompt from file: ${config.promptPath}`);
+
+  // Start sending prompt to pipe in background
+  const catProcess = spawn("cat", [config.promptPath], {
+    stdio: ["ignore", "pipe", "inherit"],
+  });
+  const pipeStream = createWriteStream(PIPE_PATH);
+  catProcess.stdout.pipe(pipeStream);
+
+  catProcess.on("error", (error) => {
+    console.error("Error reading prompt file:", error);
+    pipeStream.destroy();
+  });
+
+  const claudeProcess = spawn("claude", config.claudeArgs, {
+    stdio: ["pipe", "pipe", "inherit"],
+    env: {
+      ...process.env,
+      ...config.env,
+    },
+  });
+
+  // Handle Claude process errors
+  claudeProcess.on("error", (error) => {
+    console.error("Error spawning Claude process:", error);
+    pipeStream.destroy();
+  });
+
+  // Capture output for parsing execution metrics
+  let output = "";
+  claudeProcess.stdout.on("data", (data) => {
+    const text = data.toString();
+
+    // Try to parse as JSON and pretty print if it's on a single line
+    const lines = text.split("\n");
+    lines.forEach((line: string, index: number) => {
+      if (line.trim() === "") return;
+
+      try {
+        // Check if this line is a JSON object
+        const parsed = JSON.parse(line);
+        const prettyJson = JSON.stringify(parsed, null, 2);
+        process.stdout.write(prettyJson);
+        if (index < lines.length - 1 || text.endsWith("\n")) {
+          process.stdout.write("\n");
+        }
+      } catch (e) {
+        // Not a JSON object, print as is
+        process.stdout.write(line);
+        if (index < lines.length - 1 || text.endsWith("\n")) {
+          process.stdout.write("\n");
+        }
+      }
+    });
+
+    output += text;
+  });
+
+  // Handle stdout errors
+  claudeProcess.stdout.on("error", (error) => {
+    console.error("Error reading Claude stdout:", error);
+  });
+
+  // Pipe from named pipe to Claude
+  const pipeProcess = spawn("cat", [PIPE_PATH]);
+  pipeProcess.stdout.pipe(claudeProcess.stdin);
+
+  // Handle pipe process errors
+  pipeProcess.on("error", (error) => {
+    console.error("Error reading from named pipe:", error);
+    claudeProcess.kill("SIGTERM");
+  });
+
+  // Wait for Claude to finish with timeout
+  let timeoutMs = 10 * 60 * 1000; // Default 10 minutes
+  if (options.timeoutMinutes) {
+    timeoutMs = parseInt(options.timeoutMinutes, 10) * 60 * 1000;
+  } else if (process.env.INPUT_TIMEOUT_MINUTES) {
+    const envTimeout = parseInt(process.env.INPUT_TIMEOUT_MINUTES, 10);
+    if (isNaN(envTimeout) || envTimeout <= 0) {
+      throw new Error(
+        `INPUT_TIMEOUT_MINUTES must be a positive number, got: ${process.env.INPUT_TIMEOUT_MINUTES}`,
+      );
+    }
+    timeoutMs = envTimeout * 60 * 1000;
+  }
+  const exitCode = await new Promise<number>((resolve) => {
+    let resolved = false;
+
+    // Set a timeout for the process
+    const timeoutId = setTimeout(() => {
+      if (!resolved) {
+        console.error(
+          `Claude process timed out after ${timeoutMs / 1000} seconds`,
+        );
+        claudeProcess.kill("SIGTERM");
+        // Give it 5 seconds to terminate gracefully, then force kill
+        setTimeout(() => {
+          try {
+            claudeProcess.kill("SIGKILL");
+          } catch (e) {
+            // Process may already be dead
+          }
+        }, 5000);
+        resolved = true;
+        resolve(124); // Standard timeout exit code
+      }
+    }, timeoutMs);
+
+    claudeProcess.on("close", (code) => {
+      if (!resolved) {
+        clearTimeout(timeoutId);
+        resolved = true;
+        resolve(code || 0);
+      }
+    });
+
+    claudeProcess.on("error", (error) => {
+      if (!resolved) {
+        console.error("Claude process error:", error);
+        clearTimeout(timeoutId);
+        resolved = true;
+        resolve(1);
+      }
+    });
+  });
+
+  // Clean up processes
+  try {
+    catProcess.kill("SIGTERM");
+  } catch (e) {
+    // Process may already be dead
+  }
+  try {
+    pipeProcess.kill("SIGTERM");
+  } catch (e) {
+    // Process may already be dead
+  }
+
+  // Clean up pipe file
+  try {
+    await unlink(PIPE_PATH);
+  } catch (e) {
+    // Ignore errors during cleanup
+  }
+
+  // Set conclusion based on exit code
+  if (exitCode === 0) {
+    // Try to process the output and save execution metrics
+    try {
+      await writeFile("output.txt", output);
+
+      // Process output.txt into JSON and save to execution file
+      const { stdout: jsonOutput } = await execAsync("jq -s '.' output.txt");
+      await writeFile(EXECUTION_FILE, jsonOutput);
+
+      console.log(`Log saved to ${EXECUTION_FILE}`);
+    } catch (e) {
+      core.warning(`Failed to process output for execution metrics: ${e}`);
+    }
+
+    core.setOutput("conclusion", "success");
+    core.setOutput("execution_file", EXECUTION_FILE);
+  } else {
+    core.setOutput("conclusion", "failure");
+
+    // Still try to save execution file if we have output
+    if (output) {
+      try {
+        await writeFile("output.txt", output);
+        const { stdout: jsonOutput } = await execAsync("jq -s '.' output.txt");
+        await writeFile(EXECUTION_FILE, jsonOutput);
+        core.setOutput("execution_file", EXECUTION_FILE);
+      } catch (e) {
+        // Ignore errors when processing output during failure
+      }
+    }
+
+    process.exit(exitCode);
+  }
+}
--- a/base-action/src/setup-claude-code-settings.ts
+++ b/base-action/src/setup-claude-code-settings.ts
@@ -0,0 +1,68 @@
+import { $ } from "bun";
+import { homedir } from "os";
+import { readFile } from "fs/promises";
+
+export async function setupClaudeCodeSettings(
+  settingsInput?: string,
+  homeDir?: string,
+) {
+  const home = homeDir ?? homedir();
+  const settingsPath = `${home}/.claude/settings.json`;
+  console.log(`Setting up Claude settings at: ${settingsPath}`);
+
+  // Ensure .claude directory exists
+  console.log(`Creating .claude directory...`);
+  await $`mkdir -p ${home}/.claude`.quiet();
+
+  let settings: Record<string, unknown> = {};
+  try {
+    const existingSettings = await $`cat ${settingsPath}`.quiet().text();
+    if (existingSettings.trim()) {
+      settings = JSON.parse(existingSettings);
+      console.log(
+        `Found existing settings:`,
+        JSON.stringify(settings, null, 2),
+      );
+    } else {
+      console.log(`Settings file exists but is empty`);
+    }
+  } catch (e) {
+    console.log(`No existing settings file found, creating new one`);
+  }
+
+  // Handle settings input (either file path or JSON string)
+  if (settingsInput && settingsInput.trim()) {
+    console.log(`Processing settings input...`);
+    let inputSettings: Record<string, unknown> = {};
+
+    try {
+      // First try to parse as JSON
+      inputSettings = JSON.parse(settingsInput);
+      console.log(`Parsed settings input as JSON`);
+    } catch (e) {
+      // If not JSON, treat as file path
+      console.log(
+        `Settings input is not JSON, treating as file path: ${settingsInput}`,
+      );
+      try {
+        const fileContent = await readFile(settingsInput, "utf-8");
+        inputSettings = JSON.parse(fileContent);
+        console.log(`Successfully read and parsed settings from file`);
+      } catch (fileError) {
+        console.error(`Failed to read or parse settings file: ${fileError}`);
+        throw new Error(`Failed to process settings input: ${fileError}`);
+      }
+    }
+
+    // Merge input settings with existing settings
+    settings = { ...settings, ...inputSettings };
+    console.log(`Merged settings with input settings`);
+  }
+
+  // Always set enableAllProjectMcpServers to true
+  settings.enableAllProjectMcpServers = true;
+  console.log(`Updated settings with enableAllProjectMcpServers: true`);
+
+  await $`echo ${JSON.stringify(settings, null, 2)} > ${settingsPath}`.quiet();
+  console.log(`Settings saved successfully`);
+}
--- a/base-action/src/validate-env.ts
+++ b/base-action/src/validate-env.ts
@@ -0,0 +1,54 @@
+/**
+ * Validates the environment variables required for running Claude Code
+ * based on the selected provider (Anthropic API, AWS Bedrock, or Google Vertex AI)
+ */
+export function validateEnvironmentVariables() {
+  const useBedrock = process.env.CLAUDE_CODE_USE_BEDROCK === "1";
+  const useVertex = process.env.CLAUDE_CODE_USE_VERTEX === "1";
+  const anthropicApiKey = process.env.ANTHROPIC_API_KEY;
+  const claudeCodeOAuthToken = process.env.CLAUDE_CODE_OAUTH_TOKEN;
+
+  const errors: string[] = [];
+
+  if (useBedrock && useVertex) {
+    errors.push(
+      "Cannot use both Bedrock and Vertex AI simultaneously. Please set only one provider.",
+    );
+  }
+
+  if (!useBedrock && !useVertex) {
+    if (!anthropicApiKey && !claudeCodeOAuthToken) {
+      errors.push(
+        "Either ANTHROPIC_API_KEY or CLAUDE_CODE_OAUTH_TOKEN is required when using direct Anthropic API.",
+      );
+    }
+  } else if (useBedrock) {
+    const requiredBedrockVars = {
+      AWS_REGION: process.env.AWS_REGION,
+      AWS_ACCESS_KEY_ID: process.env.AWS_ACCESS_KEY_ID,
+      AWS_SECRET_ACCESS_KEY: process.env.AWS_SECRET_ACCESS_KEY,
+    };
+
+    Object.entries(requiredBedrockVars).forEach(([key, value]) => {
+      if (!value) {
+        errors.push(`${key} is required when using AWS Bedrock.`);
+      }
+    });
+  } else if (useVertex) {
+    const requiredVertexVars = {
+      ANTHROPIC_VERTEX_PROJECT_ID: process.env.ANTHROPIC_VERTEX_PROJECT_ID,
+      CLOUD_ML_REGION: process.env.CLOUD_ML_REGION,
+    };
+
+    Object.entries(requiredVertexVars).forEach(([key, value]) => {
+      if (!value) {
+        errors.push(`${key} is required when using Google Vertex AI.`);
+      }
+    });
+  }
+
+  if (errors.length > 0) {
+    const errorMessage = `Environment variable validation failed:\n${errors.map((e) => `  - ${e}`).join("\n")}`;
+    throw new Error(errorMessage);
+  }
+}
--- a/base-action/test-local.sh
+++ b/base-action/test-local.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+# Install act if not already installed
+if ! command -v act &> /dev/null; then
+    echo "Installing act..."
+    brew install act
+fi
+
+# Run the test workflow locally
+# You'll need to provide your ANTHROPIC_API_KEY
+echo "Running action locally with act..."
+act push --secret ANTHROPIC_API_KEY="$ANTHROPIC_API_KEY" -W .github/workflows/test-action.yml --container-architecture linux/amd64
--- a/base-action/test-mcp-local.sh
+++ b/base-action/test-mcp-local.sh
@@ -0,0 +1,18 @@
+#!/bin/bash
+
+# Install act if not already installed
+if ! command -v act &> /dev/null; then
+    echo "Installing act..."
+    brew install act
+fi
+
+# Check if ANTHROPIC_API_KEY is set
+if [ -z "$ANTHROPIC_API_KEY" ]; then
+    echo "Error: ANTHROPIC_API_KEY environment variable is not set"
+    echo "Please export your API key: export ANTHROPIC_API_KEY='your-key-here'"
+    exit 1
+fi
+
+# Run the MCP test workflow locally
+echo "Running MCP server test locally with act..."
+act push --secret ANTHROPIC_API_KEY="$ANTHROPIC_API_KEY" -W .github/workflows/test-mcp-servers.yml --container-architecture linux/amd64
--- a/base-action/test/mcp-test/.mcp.json
+++ b/base-action/test/mcp-test/.mcp.json
@@ -0,0 +1,10 @@
+{
+  "mcpServers": {
+    "test-server": {
+      "type": "stdio",
+      "command": "bun",
+      "args": ["simple-mcp-server.ts"],
+      "env": {}
+    }
+  }
+}
--- a/base-action/test/mcp-test/.npmrc
+++ b/base-action/test/mcp-test/.npmrc
@@ -0,0 +1,2 @@
+engine-strict=true
+registry=https://registry.npmjs.org/
--- a/base-action/test/mcp-test/bun.lock
+++ b/base-action/test/mcp-test/bun.lock
@@ -0,0 +1,186 @@
+{
+  "lockfileVersion": 1,
+  "workspaces": {
+    "": {
+      "name": "mcp-test",
+      "dependencies": {
+        "@modelcontextprotocol/sdk": "^1.11.0",
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+    "safer-buffer": ["safer-buffer@2.1.2", "", {}, "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="],
+
+    "send": ["send@1.2.0", "", { "dependencies": { "debug": "^4.3.5", "encodeurl": "^2.0.0", "escape-html": "^1.0.3", "etag": "^1.8.1", "fresh": "^2.0.0", "http-errors": "^2.0.0", "mime-types": "^3.0.1", "ms": "^2.1.3", "on-finished": "^2.4.1", "range-parser": "^1.2.1", "statuses": "^2.0.1" } }, "sha512-uaW0WwXKpL9blXE2o0bRhoL2EGXIrZxQ2ZQ4mgcfoBxdFmQold+qWsD2jLrfZ0trjKL6vOw0j//eAwcALFjKSw=="],
+
+    "serve-static": ["serve-static@2.2.0", "", { "dependencies": { "encodeurl": "^2.0.0", "escape-html": "^1.0.3", "parseurl": "^1.3.3", "send": "^1.2.0" } }, "sha512-61g9pCh0Vnh7IutZjtLGGpTA355+OPn2TyDv/6ivP2h/AdAVX9azsoxmg2/M6nZeQZNYBEwIcsne1mJd9oQItQ=="],
+
+    "setprototypeof": ["setprototypeof@1.2.0", "", {}, "sha512-E5LDX7Wrp85Kil5bhZv46j8jOeboKq5JMmYM3gVGdGH8xFpPWXUMsNrlODCrkoxMEeNi/XZIwuRvY4XNwYMJpw=="],
+
+    "shebang-command": ["shebang-command@2.0.0", "", { "dependencies": { "shebang-regex": "^3.0.0" } }, "sha512-kHxr2zZpYtdmrN1qDjrrX/Z1rR1kG8Dx+gkpK1G4eXmvXswmcE1hTWBWYUzlraYw1/yZp6YuDY77YtvbN0dmDA=="],
+
+    "shebang-regex": ["shebang-regex@3.0.0", "", {}, "sha512-7++dFhtcx3353uBaq8DDR4NuxBetBzC7ZQOhmTQInHEd6bSrXdiEyzCvG07Z44UYdLShWUyXt5M/yhz8ekcb1A=="],
+
+    "side-channel": ["side-channel@1.1.0", "", { "dependencies": { "es-errors": "^1.3.0", "object-inspect": "^1.13.3", "side-channel-list": "^1.0.0", "side-channel-map": "^1.0.1", "side-channel-weakmap": "^1.0.2" } }, "sha512-ZX99e6tRweoUXqR+VBrslhda51Nh5MTQwou5tnUDgbtyM0dBgmhEDtWGP/xbKn6hqfPRHujUNwz5fy/wbbhnpw=="],
+
+    "side-channel-list": ["side-channel-list@1.0.0", "", { "dependencies": { "es-errors": "^1.3.0", "object-inspect": "^1.13.3" } }, "sha512-FCLHtRD/gnpCiCHEiJLOwdmFP+wzCmDEkc9y7NsYxeF4u7Btsn1ZuwgwJGxImImHicJArLP4R0yX4c2KCrMrTA=="],
+
+    "side-channel-map": ["side-channel-map@1.0.1", "", { "dependencies": { "call-bound": "^1.0.2", "es-errors": "^1.3.0", "get-intrinsic": "^1.2.5", "object-inspect": "^1.13.3" } }, "sha512-VCjCNfgMsby3tTdo02nbjtM/ewra6jPHmpThenkTYh8pG9ucZ/1P8So4u4FGBek/BjpOVsDCMoLA/iuBKIFXRA=="],
+
+    "side-channel-weakmap": ["side-channel-weakmap@1.0.2", "", { "dependencies": { "call-bound": "^1.0.2", "es-errors": "^1.3.0", "get-intrinsic": "^1.2.5", "object-inspect": "^1.13.3", "side-channel-map": "^1.0.1" } }, "sha512-WPS/HvHQTYnHisLo9McqBHOJk2FkHO/tlpvldyrnem4aeQp4hai3gythswg6p01oSoTl58rcpiFAjF2br2Ak2A=="],
+
+    "statuses": ["statuses@2.0.1", "", {}, "sha512-RwNA9Z/7PrK06rYLIzFMlaF+l73iwpzsqRIFgbMLbTcLD6cOao82TaWefPXQvB2fOC4AjuYSEndS7N/mTCbkdQ=="],
+
+    "toidentifier": ["toidentifier@1.0.1", "", {}, "sha512-o5sSPKEkg/DIQNmH43V0/uerLrpzVedkUh8tGNvaeXpfpuwjKenlSox/2O/BTlZUtEe+JG7s5YhEz608PlAHRA=="],
+
+    "type-is": ["type-is@2.0.1", "", { "dependencies": { "content-type": "^1.0.5", "media-typer": "^1.1.0", "mime-types": "^3.0.0" } }, "sha512-OZs6gsjF4vMp32qrCbiVSkrFmXtG/AZhY3t0iAMrMBiAZyV9oALtXO8hsrHbMXF9x6L3grlFuwW2oAz7cav+Gw=="],
+
+    "unpipe": ["unpipe@1.0.0", "", {}, "sha512-pjy2bYhSsufwWlKwPc+l3cN7+wuJlK6uz0YdJEOlQDbl6jo/YlPi4mb8agUkVC8BF7V8NuzeyPNqRksA3hztKQ=="],
+
+    "uri-js": ["uri-js@4.4.1", "", { "dependencies": { "punycode": "^2.1.0" } }, "sha512-7rKUyy33Q1yc98pQ1DAmLtwX109F7TIfWlW1Ydo8Wl1ii1SeHieeh0HHfPeL2fMXK6z0s8ecKs9frCuLJvndBg=="],
+
+    "vary": ["vary@1.1.2", "", {}, "sha512-BNGbWLfd0eUPabhkXUVm0j8uuvREyTh5ovRa/dyow/BqAbZJyC+5fU+IzQOzmAKzYqYRAISoRhdQr3eIZ/PXqg=="],
+
+    "which": ["which@2.0.2", "", { "dependencies": { "isexe": "^2.0.0" }, "bin": { "node-which": "./bin/node-which" } }, "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA=="],
+
+    "wrappy": ["wrappy@1.0.2", "", {}, "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ=="],
+
+    "zod": ["zod@3.25.32", "", {}, "sha512-OSm2xTIRfW8CV5/QKgngwmQW/8aPfGdaQFlrGoErlgg/Epm7cjb6K6VEyExfe65a3VybUOnu381edLb0dfJl0g=="],
+
+    "zod-to-json-schema": ["zod-to-json-schema@3.24.5", "", { "peerDependencies": { "zod": "^3.24.1" } }, "sha512-/AuWwMP+YqiPbsJx5D6TfgRTc4kTLjsh5SOcd4bLsfUg2RcEXrFMJl1DGgdHy2aCfsIA/cr/1JM0xcB2GZji8g=="],
+  }
+}
--- a/base-action/test/mcp-test/package.json
+++ b/base-action/test/mcp-test/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "mcp-test",
+  "version": "1.0.0",
+  "dependencies": {
+    "@modelcontextprotocol/sdk": "^1.11.0"
+  }
+}
--- a/base-action/test/mcp-test/simple-mcp-server.ts
+++ b/base-action/test/mcp-test/simple-mcp-server.ts
@@ -0,0 +1,29 @@
+#!/usr/bin/env bun
+import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
+import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
+
+const server = new McpServer({
+  name: "test-server",
+  version: "1.0.0",
+});
+
+server.tool("test_tool", "A simple test tool", {}, async () => {
+  return {
+    content: [
+      {
+        type: "text",
+        text: "Test tool response",
+      },
+    ],
+  };
+});
+
+async function runServer() {
+  const transport = new StdioServerTransport();
+  await server.connect(transport);
+  process.on("exit", () => {
+    server.close();
+  });
+}
+
+runServer().catch(console.error);
--- a/base-action/test/prepare-prompt.test.ts
+++ b/base-action/test/prepare-prompt.test.ts
@@ -0,0 +1,114 @@
+#!/usr/bin/env bun
+
+import { describe, test, expect, beforeEach, afterEach } from "bun:test";
+import { preparePrompt, type PreparePromptInput } from "../src/prepare-prompt";
+import { unlink, writeFile, readFile, stat } from "fs/promises";
+
+describe("preparePrompt integration tests", () => {
+  beforeEach(async () => {
+    try {
+      await unlink("/tmp/claude-action/prompt.txt");
+    } catch {
+      // Ignore if file doesn't exist
+    }
+  });
+
+  afterEach(async () => {
+    try {
+      await unlink("/tmp/claude-action/prompt.txt");
+    } catch {
+      // Ignore if file doesn't exist
+    }
+  });
+
+  test("should create temporary prompt file when only prompt is provided", async () => {
+    const input: PreparePromptInput = {
+      prompt: "This is a test prompt",
+      promptFile: "",
+    };
+
+    const config = await preparePrompt(input);
+
+    expect(config.path).toBe("/tmp/claude-action/prompt.txt");
+    expect(config.type).toBe("inline");
+
+    const fileContent = await readFile(config.path, "utf-8");
+    expect(fileContent).toBe("This is a test prompt");
+
+    const fileStat = await stat(config.path);
+    expect(fileStat.size).toBeGreaterThan(0);
+  });
+
+  test("should use existing file when promptFile is provided", async () => {
+    const testFilePath = "/tmp/test-prompt.txt";
+    await writeFile(testFilePath, "Prompt from file");
+
+    const input: PreparePromptInput = {
+      prompt: "",
+      promptFile: testFilePath,
+    };
+
+    const config = await preparePrompt(input);
+
+    expect(config.path).toBe(testFilePath);
+    expect(config.type).toBe("file");
+
+    await unlink(testFilePath);
+  });
+
+  test("should fail when neither prompt nor promptFile is provided", async () => {
+    const input: PreparePromptInput = {
+      prompt: "",
+      promptFile: "",
+    };
+
+    await expect(preparePrompt(input)).rejects.toThrow(
+      "Neither 'prompt' nor 'prompt_file' was provided",
+    );
+  });
+
+  test("should fail when promptFile points to non-existent file", async () => {
+    const input: PreparePromptInput = {
+      prompt: "",
+      promptFile: "/tmp/non-existent-file.txt",
+    };
+
+    await expect(preparePrompt(input)).rejects.toThrow(
+      "Prompt file '/tmp/non-existent-file.txt' does not exist.",
+    );
+  });
+
+  test("should fail when prompt is empty", async () => {
+    const emptyFilePath = "/tmp/empty-prompt.txt";
+    await writeFile(emptyFilePath, "");
+
+    const input: PreparePromptInput = {
+      prompt: "",
+      promptFile: emptyFilePath,
+    };
+
+    await expect(preparePrompt(input)).rejects.toThrow("Prompt file is empty");
+
+    try {
+      await unlink(emptyFilePath);
+    } catch {
+      // Ignore cleanup errors
+    }
+  });
+
+  test("should fail when both prompt and promptFile are provided", async () => {
+    const testFilePath = "/tmp/test-prompt.txt";
+    await writeFile(testFilePath, "Prompt from file");
+
+    const input: PreparePromptInput = {
+      prompt: "This should cause an error",
+      promptFile: testFilePath,
+    };
+
+    await expect(preparePrompt(input)).rejects.toThrow(
+      "Both 'prompt' and 'prompt_file' were provided. Please specify only one.",
+    );
+
+    await unlink(testFilePath);
+  });
+});
--- a/base-action/test/run-claude.test.ts
+++ b/base-action/test/run-claude.test.ts
@@ -0,0 +1,297 @@
+#!/usr/bin/env bun
+
+import { describe, test, expect } from "bun:test";
+import { prepareRunConfig, type ClaudeOptions } from "../src/run-claude";
+
+describe("prepareRunConfig", () => {
+  test("should prepare config with basic arguments", () => {
+    const options: ClaudeOptions = {};
+    const prepared = prepareRunConfig("/tmp/test-prompt.txt", options);
+
+    expect(prepared.claudeArgs.slice(0, 4)).toEqual([
+      "-p",
+      "--verbose",
+      "--output-format",
+      "stream-json",
+    ]);
+  });
+
+  test("should include promptPath", () => {
+    const options: ClaudeOptions = {};
+    const prepared = prepareRunConfig("/tmp/test-prompt.txt", options);
+
+    expect(prepared.promptPath).toBe("/tmp/test-prompt.txt");
+  });
+
+  test("should include allowed tools in command arguments", () => {
+    const options: ClaudeOptions = {
+      allowedTools: "Bash,Read",
+    };
+    const prepared = prepareRunConfig("/tmp/test-prompt.txt", options);
+
+    expect(prepared.claudeArgs).toContain("--allowedTools");
+    expect(prepared.claudeArgs).toContain("Bash,Read");
+  });
+
+  test("should include disallowed tools in command arguments", () => {
+    const options: ClaudeOptions = {
+      disallowedTools: "Bash,Read",
+    };
+    const prepared = prepareRunConfig("/tmp/test-prompt.txt", options);
+
+    expect(prepared.claudeArgs).toContain("--disallowedTools");
+    expect(prepared.claudeArgs).toContain("Bash,Read");
+  });
+
+  test("should include max turns in command arguments", () => {
+    const options: ClaudeOptions = {
+      maxTurns: "5",
+    };
+    const prepared = prepareRunConfig("/tmp/test-prompt.txt", options);
+
+    expect(prepared.claudeArgs).toContain("--max-turns");
+    expect(prepared.claudeArgs).toContain("5");
+  });
+
+  test("should include mcp config in command arguments", () => {
+    const options: ClaudeOptions = {
+      mcpConfig: "/path/to/mcp-config.json",
+    };
+    const prepared = prepareRunConfig("/tmp/test-prompt.txt", options);
+
+    expect(prepared.claudeArgs).toContain("--mcp-config");
+    expect(prepared.claudeArgs).toContain("/path/to/mcp-config.json");
+  });
+
+  test("should include system prompt in command arguments", () => {
+    const options: ClaudeOptions = {
+      systemPrompt: "You are a senior backend engineer.",
+    };
+    const prepared = prepareRunConfig("/tmp/test-prompt.txt", options);
+
+    expect(prepared.claudeArgs).toContain("--system-prompt");
+    expect(prepared.claudeArgs).toContain("You are a senior backend engineer.");
+  });
+
+  test("should include append system prompt in command arguments", () => {
+    const options: ClaudeOptions = {
+      appendSystemPrompt:
+        "After writing code, be sure to code review yourself.",
+    };
+    const prepared = prepareRunConfig("/tmp/test-prompt.txt", options);
+
+    expect(prepared.claudeArgs).toContain("--append-system-prompt");
+    expect(prepared.claudeArgs).toContain(
+      "After writing code, be sure to code review yourself.",
+    );
+  });
+
+  test("should include fallback model in command arguments", () => {
+    const options: ClaudeOptions = {
+      fallbackModel: "claude-sonnet-4-20250514",
+    };
+    const prepared = prepareRunConfig("/tmp/test-prompt.txt", options);
+
+    expect(prepared.claudeArgs).toContain("--fallback-model");
+    expect(prepared.claudeArgs).toContain("claude-sonnet-4-20250514");
+  });
+
+  test("should use provided prompt path", () => {
+    const options: ClaudeOptions = {};
+    const prepared = prepareRunConfig("/custom/prompt/path.txt", options);
+
+    expect(prepared.promptPath).toBe("/custom/prompt/path.txt");
+  });
+
+  test("should not include optional arguments when not set", () => {
+    const options: ClaudeOptions = {};
+    const prepared = prepareRunConfig("/tmp/test-prompt.txt", options);
+
+    expect(prepared.claudeArgs).not.toContain("--allowedTools");
+    expect(prepared.claudeArgs).not.toContain("--disallowedTools");
+    expect(prepared.claudeArgs).not.toContain("--max-turns");
+    expect(prepared.claudeArgs).not.toContain("--mcp-config");
+    expect(prepared.claudeArgs).not.toContain("--system-prompt");
+    expect(prepared.claudeArgs).not.toContain("--append-system-prompt");
+    expect(prepared.claudeArgs).not.toContain("--fallback-model");
+  });
+
+  test("should preserve order of claude arguments", () => {
+    const options: ClaudeOptions = {
+      allowedTools: "Bash,Read",
+      maxTurns: "3",
+    };
+    const prepared = prepareRunConfig("/tmp/test-prompt.txt", options);
+
+    expect(prepared.claudeArgs).toEqual([
+      "-p",
+      "--verbose",
+      "--output-format",
+      "stream-json",
+      "--allowedTools",
+      "Bash,Read",
+      "--max-turns",
+      "3",
+    ]);
+  });
+
+  test("should preserve order with all options including fallback model", () => {
+    const options: ClaudeOptions = {
+      allowedTools: "Bash,Read",
+      disallowedTools: "Write",
+      maxTurns: "3",
+      mcpConfig: "/path/to/config.json",
+      systemPrompt: "You are a helpful assistant",
+      appendSystemPrompt: "Be concise",
+      fallbackModel: "claude-sonnet-4-20250514",
+    };
+    const prepared = prepareRunConfig("/tmp/test-prompt.txt", options);
+
+    expect(prepared.claudeArgs).toEqual([
+      "-p",
+      "--verbose",
+      "--output-format",
+      "stream-json",
+      "--allowedTools",
+      "Bash,Read",
+      "--disallowedTools",
+      "Write",
+      "--max-turns",
+      "3",
+      "--mcp-config",
+      "/path/to/config.json",
+      "--system-prompt",
+      "You are a helpful assistant",
+      "--append-system-prompt",
+      "Be concise",
+      "--fallback-model",
+      "claude-sonnet-4-20250514",
+    ]);
+  });
+
+  describe("maxTurns validation", () => {
+    test("should accept valid maxTurns value", () => {
+      const options: ClaudeOptions = { maxTurns: "5" };
+      const prepared = prepareRunConfig("/tmp/test-prompt.txt", options);
+      expect(prepared.claudeArgs).toContain("--max-turns");
+      expect(prepared.claudeArgs).toContain("5");
+    });
+
+    test("should throw error for non-numeric maxTurns", () => {
+      const options: ClaudeOptions = { maxTurns: "abc" };
+      expect(() => prepareRunConfig("/tmp/test-prompt.txt", options)).toThrow(
+        "maxTurns must be a positive number, got: abc",
+      );
+    });
+
+    test("should throw error for negative maxTurns", () => {
+      const options: ClaudeOptions = { maxTurns: "-1" };
+      expect(() => prepareRunConfig("/tmp/test-prompt.txt", options)).toThrow(
+        "maxTurns must be a positive number, got: -1",
+      );
+    });
+
+    test("should throw error for zero maxTurns", () => {
+      const options: ClaudeOptions = { maxTurns: "0" };
+      expect(() => prepareRunConfig("/tmp/test-prompt.txt", options)).toThrow(
+        "maxTurns must be a positive number, got: 0",
+      );
+    });
+  });
+
+  describe("timeoutMinutes validation", () => {
+    test("should accept valid timeoutMinutes value", () => {
+      const options: ClaudeOptions = { timeoutMinutes: "15" };
+      expect(() =>
+        prepareRunConfig("/tmp/test-prompt.txt", options),
+      ).not.toThrow();
+    });
+
+    test("should throw error for non-numeric timeoutMinutes", () => {
+      const options: ClaudeOptions = { timeoutMinutes: "abc" };
+      expect(() => prepareRunConfig("/tmp/test-prompt.txt", options)).toThrow(
+        "timeoutMinutes must be a positive number, got: abc",
+      );
+    });
+
+    test("should throw error for negative timeoutMinutes", () => {
+      const options: ClaudeOptions = { timeoutMinutes: "-5" };
+      expect(() => prepareRunConfig("/tmp/test-prompt.txt", options)).toThrow(
+        "timeoutMinutes must be a positive number, got: -5",
+      );
+    });
+
+    test("should throw error for zero timeoutMinutes", () => {
+      const options: ClaudeOptions = { timeoutMinutes: "0" };
+      expect(() => prepareRunConfig("/tmp/test-prompt.txt", options)).toThrow(
+        "timeoutMinutes must be a positive number, got: 0",
+      );
+    });
+  });
+
+  describe("custom environment variables", () => {
+    test("should parse empty claudeEnv correctly", () => {
+      const options: ClaudeOptions = { claudeEnv: "" };
+      const prepared = prepareRunConfig("/tmp/test-prompt.txt", options);
+      expect(prepared.env).toEqual({});
+    });
+
+    test("should parse single environment variable", () => {
+      const options: ClaudeOptions = { claudeEnv: "API_KEY: secret123" };
+      const prepared = prepareRunConfig("/tmp/test-prompt.txt", options);
+      expect(prepared.env).toEqual({ API_KEY: "secret123" });
+    });
+
+    test("should parse multiple environment variables", () => {
+      const options: ClaudeOptions = {
+        claudeEnv: "API_KEY: secret123\nDEBUG: true\nUSER: testuser",
+      };
+      const prepared = prepareRunConfig("/tmp/test-prompt.txt", options);
+      expect(prepared.env).toEqual({
+        API_KEY: "secret123",
+        DEBUG: "true",
+        USER: "testuser",
+      });
+    });
+
+    test("should handle environment variables with spaces around values", () => {
+      const options: ClaudeOptions = {
+        claudeEnv: "API_KEY:  secret123  \n  DEBUG  :  true  ",
+      };
+      const prepared = prepareRunConfig("/tmp/test-prompt.txt", options);
+      expect(prepared.env).toEqual({
+        API_KEY: "secret123",
+        DEBUG: "true",
+      });
+    });
+
+    test("should skip empty lines and comments", () => {
+      const options: ClaudeOptions = {
+        claudeEnv:
+          "API_KEY: secret123\n\n# This is a comment\nDEBUG: true\n# Another comment",
+      };
+      const prepared = prepareRunConfig("/tmp/test-prompt.txt", options);
+      expect(prepared.env).toEqual({
+        API_KEY: "secret123",
+        DEBUG: "true",
+      });
+    });
+
+    test("should skip lines without colons", () => {
+      const options: ClaudeOptions = {
+        claudeEnv: "API_KEY: secret123\nINVALID_LINE\nDEBUG: true",
+      };
+      const prepared = prepareRunConfig("/tmp/test-prompt.txt", options);
+      expect(prepared.env).toEqual({
+        API_KEY: "secret123",
+        DEBUG: "true",
+      });
+    });
+
+    test("should handle undefined claudeEnv", () => {
+      const options: ClaudeOptions = {};
+      const prepared = prepareRunConfig("/tmp/test-prompt.txt", options);
+      expect(prepared.env).toEqual({});
+    });
+  });
+});
--- a/base-action/test/setup-claude-code-settings.test.ts
+++ b/base-action/test/setup-claude-code-settings.test.ts
@@ -0,0 +1,150 @@
+#!/usr/bin/env bun
+
+import { describe, test, expect, beforeEach, afterEach } from "bun:test";
+import { setupClaudeCodeSettings } from "../src/setup-claude-code-settings";
+import { tmpdir } from "os";
+import { mkdir, writeFile, readFile, rm } from "fs/promises";
+import { join } from "path";
+
+const testHomeDir = join(
+  tmpdir(),
+  "claude-code-test-home",
+  Date.now().toString(),
+);
+const settingsPath = join(testHomeDir, ".claude", "settings.json");
+const testSettingsDir = join(testHomeDir, ".claude-test");
+const testSettingsPath = join(testSettingsDir, "test-settings.json");
+
+describe("setupClaudeCodeSettings", () => {
+  beforeEach(async () => {
+    // Create test home directory and test settings directory
+    await mkdir(testHomeDir, { recursive: true });
+    await mkdir(testSettingsDir, { recursive: true });
+  });
+
+  afterEach(async () => {
+    // Clean up test home directory
+    await rm(testHomeDir, { recursive: true, force: true });
+  });
+
+  test("should always set enableAllProjectMcpServers to true when no input", async () => {
+    await setupClaudeCodeSettings(undefined, testHomeDir);
+
+    const settingsContent = await readFile(settingsPath, "utf-8");
+    const settings = JSON.parse(settingsContent);
+
+    expect(settings.enableAllProjectMcpServers).toBe(true);
+  });
+
+  test("should merge settings from JSON string input", async () => {
+    const inputSettings = JSON.stringify({
+      model: "claude-sonnet-4-20250514",
+      env: { API_KEY: "test-key" },
+    });
+
+    await setupClaudeCodeSettings(inputSettings, testHomeDir);
+
+    const settingsContent = await readFile(settingsPath, "utf-8");
+    const settings = JSON.parse(settingsContent);
+
+    expect(settings.enableAllProjectMcpServers).toBe(true);
+    expect(settings.model).toBe("claude-sonnet-4-20250514");
+    expect(settings.env).toEqual({ API_KEY: "test-key" });
+  });
+
+  test("should merge settings from file path input", async () => {
+    const testSettings = {
+      hooks: {
+        PreToolUse: [
+          {
+            matcher: "Bash",
+            hooks: [{ type: "command", command: "echo test" }],
+          },
+        ],
+      },
+      permissions: {
+        allow: ["Bash", "Read"],
+      },
+    };
+
+    await writeFile(testSettingsPath, JSON.stringify(testSettings, null, 2));
+
+    await setupClaudeCodeSettings(testSettingsPath, testHomeDir);
+
+    const settingsContent = await readFile(settingsPath, "utf-8");
+    const settings = JSON.parse(settingsContent);
+
+    expect(settings.enableAllProjectMcpServers).toBe(true);
+    expect(settings.hooks).toEqual(testSettings.hooks);
+    expect(settings.permissions).toEqual(testSettings.permissions);
+  });
+
+  test("should override enableAllProjectMcpServers even if false in input", async () => {
+    const inputSettings = JSON.stringify({
+      enableAllProjectMcpServers: false,
+      model: "test-model",
+    });
+
+    await setupClaudeCodeSettings(inputSettings, testHomeDir);
+
+    const settingsContent = await readFile(settingsPath, "utf-8");
+    const settings = JSON.parse(settingsContent);
+
+    expect(settings.enableAllProjectMcpServers).toBe(true);
+    expect(settings.model).toBe("test-model");
+  });
+
+  test("should throw error for invalid JSON string", async () => {
+    expect(() =>
+      setupClaudeCodeSettings("{ invalid json", testHomeDir),
+    ).toThrow();
+  });
+
+  test("should throw error for non-existent file path", async () => {
+    expect(() =>
+      setupClaudeCodeSettings("/non/existent/file.json", testHomeDir),
+    ).toThrow();
+  });
+
+  test("should handle empty string input", async () => {
+    await setupClaudeCodeSettings("", testHomeDir);
+
+    const settingsContent = await readFile(settingsPath, "utf-8");
+    const settings = JSON.parse(settingsContent);
+
+    expect(settings.enableAllProjectMcpServers).toBe(true);
+  });
+
+  test("should handle whitespace-only input", async () => {
+    await setupClaudeCodeSettings("   \n\t  ", testHomeDir);
+
+    const settingsContent = await readFile(settingsPath, "utf-8");
+    const settings = JSON.parse(settingsContent);
+
+    expect(settings.enableAllProjectMcpServers).toBe(true);
+  });
+
+  test("should merge with existing settings", async () => {
+    // First, create some existing settings
+    await setupClaudeCodeSettings(
+      JSON.stringify({ existingKey: "existingValue" }),
+      testHomeDir,
+    );
+
+    // Then, add new settings
+    const newSettings = JSON.stringify({
+      newKey: "newValue",
+      model: "claude-opus-4-20250514",
+    });
+
+    await setupClaudeCodeSettings(newSettings, testHomeDir);
+
+    const settingsContent = await readFile(settingsPath, "utf-8");
+    const settings = JSON.parse(settingsContent);
+
+    expect(settings.enableAllProjectMcpServers).toBe(true);
+    expect(settings.existingKey).toBe("existingValue");
+    expect(settings.newKey).toBe("newValue");
+    expect(settings.model).toBe("claude-opus-4-20250514");
+  });
+});
--- a/base-action/test/validate-env.test.ts
+++ b/base-action/test/validate-env.test.ts
@@ -0,0 +1,214 @@
+#!/usr/bin/env bun
+
+import { describe, test, expect, beforeEach, afterEach } from "bun:test";
+import { validateEnvironmentVariables } from "../src/validate-env";
+
+describe("validateEnvironmentVariables", () => {
+  let originalEnv: NodeJS.ProcessEnv;
+
+  beforeEach(() => {
+    // Save the original environment
+    originalEnv = { ...process.env };
+    // Clear relevant environment variables
+    delete process.env.ANTHROPIC_API_KEY;
+    delete process.env.CLAUDE_CODE_USE_BEDROCK;
+    delete process.env.CLAUDE_CODE_USE_VERTEX;
+    delete process.env.AWS_REGION;
+    delete process.env.AWS_ACCESS_KEY_ID;
+    delete process.env.AWS_SECRET_ACCESS_KEY;
+    delete process.env.AWS_SESSION_TOKEN;
+    delete process.env.ANTHROPIC_BEDROCK_BASE_URL;
+    delete process.env.ANTHROPIC_VERTEX_PROJECT_ID;
+    delete process.env.CLOUD_ML_REGION;
+    delete process.env.GOOGLE_APPLICATION_CREDENTIALS;
+    delete process.env.ANTHROPIC_VERTEX_BASE_URL;
+  });
+
+  afterEach(() => {
+    // Restore the original environment
+    process.env = originalEnv;
+  });
+
+  describe("Direct Anthropic API", () => {
+    test("should pass when ANTHROPIC_API_KEY is provided", () => {
+      process.env.ANTHROPIC_API_KEY = "test-api-key";
+
+      expect(() => validateEnvironmentVariables()).not.toThrow();
+    });
+
+    test("should fail when ANTHROPIC_API_KEY is missing", () => {
+      expect(() => validateEnvironmentVariables()).toThrow(
+        "Either ANTHROPIC_API_KEY or CLAUDE_CODE_OAUTH_TOKEN is required when using direct Anthropic API.",
+      );
+    });
+  });
+
+  describe("AWS Bedrock", () => {
+    test("should pass when all required Bedrock variables are provided", () => {
+      process.env.CLAUDE_CODE_USE_BEDROCK = "1";
+      process.env.AWS_REGION = "us-east-1";
+      process.env.AWS_ACCESS_KEY_ID = "test-access-key";
+      process.env.AWS_SECRET_ACCESS_KEY = "test-secret-key";
+
+      expect(() => validateEnvironmentVariables()).not.toThrow();
+    });
+
+    test("should pass with optional Bedrock variables", () => {
+      process.env.CLAUDE_CODE_USE_BEDROCK = "1";
+      process.env.AWS_REGION = "us-east-1";
+      process.env.AWS_ACCESS_KEY_ID = "test-access-key";
+      process.env.AWS_SECRET_ACCESS_KEY = "test-secret-key";
+      process.env.AWS_SESSION_TOKEN = "test-session-token";
+      process.env.ANTHROPIC_BEDROCK_BASE_URL = "https://test.url";
+
+      expect(() => validateEnvironmentVariables()).not.toThrow();
+    });
+
+    test("should construct Bedrock base URL from AWS_REGION when ANTHROPIC_BEDROCK_BASE_URL is not provided", () => {
+      // This test verifies our action.yml change, which constructs:
+      // ANTHROPIC_BEDROCK_BASE_URL: ${{ env.ANTHROPIC_BEDROCK_BASE_URL || (env.AWS_REGION && format('https://bedrock-runtime.{0}.amazonaws.com', env.AWS_REGION)) }}
+
+      process.env.CLAUDE_CODE_USE_BEDROCK = "1";
+      process.env.AWS_REGION = "us-west-2";
+      process.env.AWS_ACCESS_KEY_ID = "test-access-key";
+      process.env.AWS_SECRET_ACCESS_KEY = "test-secret-key";
+      // ANTHROPIC_BEDROCK_BASE_URL is intentionally not set
+
+      // The actual URL construction happens in the composite action in action.yml
+      // This test is a placeholder to document the behavior
+      expect(() => validateEnvironmentVariables()).not.toThrow();
+
+      // In the actual action, ANTHROPIC_BEDROCK_BASE_URL would be:
+      // https://bedrock-runtime.us-west-2.amazonaws.com
+    });
+
+    test("should fail when AWS_REGION is missing", () => {
+      process.env.CLAUDE_CODE_USE_BEDROCK = "1";
+      process.env.AWS_ACCESS_KEY_ID = "test-access-key";
+      process.env.AWS_SECRET_ACCESS_KEY = "test-secret-key";
+
+      expect(() => validateEnvironmentVariables()).toThrow(
+        "AWS_REGION is required when using AWS Bedrock.",
+      );
+    });
+
+    test("should fail when AWS_ACCESS_KEY_ID is missing", () => {
+      process.env.CLAUDE_CODE_USE_BEDROCK = "1";
+      process.env.AWS_REGION = "us-east-1";
+      process.env.AWS_SECRET_ACCESS_KEY = "test-secret-key";
+
+      expect(() => validateEnvironmentVariables()).toThrow(
+        "AWS_ACCESS_KEY_ID is required when using AWS Bedrock.",
+      );
+    });
+
+    test("should fail when AWS_SECRET_ACCESS_KEY is missing", () => {
+      process.env.CLAUDE_CODE_USE_BEDROCK = "1";
+      process.env.AWS_REGION = "us-east-1";
+      process.env.AWS_ACCESS_KEY_ID = "test-access-key";
+
+      expect(() => validateEnvironmentVariables()).toThrow(
+        "AWS_SECRET_ACCESS_KEY is required when using AWS Bedrock.",
+      );
+    });
+
+    test("should report all missing Bedrock variables", () => {
+      process.env.CLAUDE_CODE_USE_BEDROCK = "1";
+
+      expect(() => validateEnvironmentVariables()).toThrow(
+        /AWS_REGION is required when using AWS Bedrock.*AWS_ACCESS_KEY_ID is required when using AWS Bedrock.*AWS_SECRET_ACCESS_KEY is required when using AWS Bedrock/s,
+      );
+    });
+  });
+
+  describe("Google Vertex AI", () => {
+    test("should pass when all required Vertex variables are provided", () => {
+      process.env.CLAUDE_CODE_USE_VERTEX = "1";
+      process.env.ANTHROPIC_VERTEX_PROJECT_ID = "test-project";
+      process.env.CLOUD_ML_REGION = "us-central1";
+
+      expect(() => validateEnvironmentVariables()).not.toThrow();
+    });
+
+    test("should pass with optional Vertex variables", () => {
+      process.env.CLAUDE_CODE_USE_VERTEX = "1";
+      process.env.ANTHROPIC_VERTEX_PROJECT_ID = "test-project";
+      process.env.CLOUD_ML_REGION = "us-central1";
+      process.env.GOOGLE_APPLICATION_CREDENTIALS = "/path/to/creds.json";
+      process.env.ANTHROPIC_VERTEX_BASE_URL = "https://test.url";
+
+      expect(() => validateEnvironmentVariables()).not.toThrow();
+    });
+
+    test("should fail when ANTHROPIC_VERTEX_PROJECT_ID is missing", () => {
+      process.env.CLAUDE_CODE_USE_VERTEX = "1";
+      process.env.CLOUD_ML_REGION = "us-central1";
+
+      expect(() => validateEnvironmentVariables()).toThrow(
+        "ANTHROPIC_VERTEX_PROJECT_ID is required when using Google Vertex AI.",
+      );
+    });
+
+    test("should fail when CLOUD_ML_REGION is missing", () => {
+      process.env.CLAUDE_CODE_USE_VERTEX = "1";
+      process.env.ANTHROPIC_VERTEX_PROJECT_ID = "test-project";
+
+      expect(() => validateEnvironmentVariables()).toThrow(
+        "CLOUD_ML_REGION is required when using Google Vertex AI.",
+      );
+    });
+
+    test("should report all missing Vertex variables", () => {
+      process.env.CLAUDE_CODE_USE_VERTEX = "1";
+
+      expect(() => validateEnvironmentVariables()).toThrow(
+        /ANTHROPIC_VERTEX_PROJECT_ID is required when using Google Vertex AI.*CLOUD_ML_REGION is required when using Google Vertex AI/s,
+      );
+    });
+  });
+
+  describe("Multiple providers", () => {
+    test("should fail when both Bedrock and Vertex are enabled", () => {
+      process.env.CLAUDE_CODE_USE_BEDROCK = "1";
+      process.env.CLAUDE_CODE_USE_VERTEX = "1";
+      // Provide all required vars to isolate the mutual exclusion error
+      process.env.AWS_REGION = "us-east-1";
+      process.env.AWS_ACCESS_KEY_ID = "test-access-key";
+      process.env.AWS_SECRET_ACCESS_KEY = "test-secret-key";
+      process.env.ANTHROPIC_VERTEX_PROJECT_ID = "test-project";
+      process.env.CLOUD_ML_REGION = "us-central1";
+
+      expect(() => validateEnvironmentVariables()).toThrow(
+        "Cannot use both Bedrock and Vertex AI simultaneously. Please set only one provider.",
+      );
+    });
+  });
+
+  describe("Error message formatting", () => {
+    test("should format error message properly with multiple errors", () => {
+      process.env.CLAUDE_CODE_USE_BEDROCK = "1";
+      // Missing all required Bedrock vars
+
+      let error: Error | undefined;
+      try {
+        validateEnvironmentVariables();
+      } catch (e) {
+        error = e as Error;
+      }
+
+      expect(error).toBeDefined();
+      expect(error!.message).toMatch(
+        /^Environment variable validation failed:/,
+      );
+      expect(error!.message).toContain(
+        "  - AWS_REGION is required when using AWS Bedrock.",
+      );
+      expect(error!.message).toContain(
+        "  - AWS_ACCESS_KEY_ID is required when using AWS Bedrock.",
+      );
+      expect(error!.message).toContain(
+        "  - AWS_SECRET_ACCESS_KEY is required when using AWS Bedrock.",
+      );
+    });
+  });
+});
--- a/base-action/tsconfig.json
+++ b/base-action/tsconfig.json
@@ -0,0 +1,30 @@
+{
+  "compilerOptions": {
+    // Environment setup & latest features
+    "lib": ["ESNext"],
+    "target": "ESNext",
+    "module": "ESNext",
+    "moduleDetection": "force",
+    "jsx": "react-jsx",
+    "allowJs": true,
+
+    // Bundler mode (Bun-specific)
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "noEmit": true,
+
+    // Best practices
+    "strict": true,
+    "skipLibCheck": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedIndexedAccess": true,
+
+    // Some stricter flags
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noPropertyAccessFromIndexSignature": false
+  },
+  "include": ["src/**/*", "test/**/*"],
+  "exclude": ["node_modules", "test/mcp-test"]
+}