# Simplified Development Plan

This document outlines the minimalist implementation plan for completing the MCP OpenVision project, focusing on essential features and MCP compliance.

## Phase 1: Core Essentials (2 weeks)

### 1.1 Basic Error Handling

**File**: `src/mcp_openvision/exceptions.py`

**Description**: Create a simple exception hierarchy for error handling.

**Tasks**:

- [ ] Define base `OpenVisionError` class
- [ ] Create `ApiError` for OpenRouter API errors
- [ ] Implement `ValidationError` for input validation
- [ ] Add helpful error messages

**Estimated Time**: 1 day

### 1.2 Environment Variables Management

**Description**: Enhance environment variable handling in server.py.

**Tasks**:

- [ ] Add validation for environment variables
- [ ] Implement better error messages for missing/invalid variables
- [ ] Document all supported environment variables

**Estimated Time**: 0.5 days

### 1.3 Test Expansion

**File**: `tests/`

**Description**: Expand test coverage for core functionality.

**Tasks**:

- [ ] Create mock responses for OpenRouter API
- [ ] Add tests for each tool function
- [ ] Test error handling scenarios
- [ ] Add validation tests

**Estimated Time**: 2 days

### 1.4 MCP Compliance Review

**Description**: Ensure strict compliance with MCP SDK patterns.

**Tasks**:

- [ ] Review all tool definitions
- [ ] Verify type annotations
- [ ] Ensure proper async/await usage
- [ ] Check error response formats

**Estimated Time**: 1 day

### 1.5 Documentation Updates

**Description**: Update documentation with essential information.

**Tasks**:

- [ ] Add clear examples for all tools
- [ ] Document error handling
- [ ] Update installation instructions
- [ ] Add troubleshooting section

**Estimated Time**: 1 day

## Phase 2: User Experience (2 weeks)

### 2.1 Helper Functions

**File**: `src/mcp_openvision/helpers.py`

**Description**: Create simple utility functions for common tasks.

**Tasks**:

- [ ] Add image loading helpers
- [ ] Create simple retry function
- [ ] Implement basic error handling wrappers
- [ ] Add type hints and documentation

**Estimated Time**: 2 days

### 2.2 Basic Image Preprocessing

**File**: `src/mcp_openvision/preprocessing.py`

**Description**: Add minimal image preprocessing utilities.

**Tasks**:

- [ ] Implement image resizing
- [ ] Add format conversion
- [ ] Create utility for base64 encoding
- [ ] Add simple validation functions

**Estimated Time**: 2 days

### 2.3 Example Expansion

**File**: `examples/`

**Description**: Create additional examples for common use cases.

**Tasks**:

- [ ] Add examples for all tool functions
- [ ] Create example with error handling
- [ ] Implement example with preprocessing
- [ ] Add commented explanations

**Estimated Time**: 1 day

### 2.4 Quality Assurance

**Description**: Ensure overall quality and usability.

**Tasks**:

- [ ] Perform end-to-end testing
- [ ] Review documentation for clarity
- [ ] Validate all examples
- [ ] Check error messages for helpfulness

**Estimated Time**: 1 day

## Implementation Timeline

### Weeks 1-2: Phase 1

- Week 1: Error Handling, Environment Variables
- Week 2: Test Expansion, MCP Compliance, Documentation

### Weeks 3-4: Phase 2

- Week 3: Helper Functions, Image Preprocessing
- Week 4: Example Expansion, Quality Assurance

## Implementation Principles

1. **Focus on Essentials**: Only implement what's necessary for core functionality
2. **Keep It Simple**: Avoid complex abstractions and patterns
3. **MCP First**: Ensure strict adherence to MCP patterns
4. **User-Friendly**: Provide clear documentation and helpful error messages

## Success Criteria

1. **MCP Compliance**: All tools follow MCP patterns correctly
2. **Documentation**: Clear examples for all functionality
3. **Error Handling**: Helpful error messages for common issues
4. **Usability**: Simple and intuitive developer experience
