# Agent Block Tests Implementation Summary

## Overview

I have successfully implemented comprehensive failing tests for agent block execution in `/Users/lydakis/Developer/alloy/tests/test_interpreter.py` following our TDD approach. These tests are designed to guide the implementation of all the agent block features we discussed.

## Test Class: `TestAgentBlockExecution`

### Test Coverage (25 comprehensive tests)

#### **1. Basic Agent Block Execution Tests (7 tests)**
- `test_agent_block_basic_execution` - Basic agent block with must commands
- `test_agent_block_must_should_semantics` - Must/Should command semantics
- `test_agent_with_system_prompt` - Agent definition with system prompt block
- `test_agent_block_implicit_variable_access` - Implicit variable access from scope
- `test_agent_block_in_chain` - Agent blocks in then chaining
- `test_agent_single_command_shorthand` - Single command without block syntax
- `test_agent_block_error_handling` - Proper error handling

#### **2. Advanced Agent Block Features (8 tests)**
- `test_agent_block_multiple_variables` - Multiple variable access
- `test_agent_block_with_complex_data` - Complex data structures
- `test_agent_block_in_conditional` - Agent blocks in conditionals
- `test_agent_block_loop_integration` - Agent blocks in loops
- `test_agent_block_nested_calls` - Nested agent calls within tools
- `test_agent_block_system_prompt_inheritance` - System prompt inheritance

#### **3. Integration and Complex Scenarios (8 tests)**
- `test_agent_block_pipeline_processing` - Complex pipelines with multiple agents
- `test_agent_block_error_recovery` - Error recovery in agent chains

#### **4. Performance and Edge Cases (2 tests)**
- `test_agent_block_empty_commands` - Minimal command handling
- `test_agent_block_variable_scope_isolation` - Variable scope isolation

## Key Features Tested

### **1. Implicit Variable Access**
Tests verify that agent blocks can access any variables in scope without explicit passing:
```alloy
user_data = "analyze this text"
result, error = claude {
    must Analyze user_data
    should Include confidence_scores
}
```

### **2. Single Combined Input**
Tests confirm that all commands in a block become ONE system prompt + user message:
- All `must` and `should` commands are included in single prompt
- ONE API call to LLM, ONE output
- Commands share the same context

### **3. Must/Should Semantics**
Tests validate that:
- **must**: Core requirements always included in prompt
- **should**: Contextual preferences included in prompt
- Agent decides how to handle "should" vs "must" in its response

### **4. System Prompt Integration**
Tests verify agent definitions can include system prompts:
```alloy
claude = agent "gpt-4o-mini" with {
    must "Act as a helpful programming assistant"
    should "Provide working code examples"
}
```

### **5. Then Chaining Integration**
Tests ensure agent blocks work seamlessly in then chains:
```alloy
result = fetch_data then claude {
    must Analyze
} then format_output
```

## API Configuration

### **Real API Testing**
- Tests are configured to use real OpenAI API calls with GPT-4o-mini model
- API key loaded from `.env` file: ✅ Available
- Falls back to mock for CI/testing environments without API key

### **Expected Test Failures**
All tests are designed to fail initially because:
1. **Parser doesn't recognize `must/should` syntax** - Syntax errors
2. **Agent block execution isn't implemented** - Runtime errors
3. **System prompt synthesis isn't implemented** - No system prompt handling
4. **Implicit variable access isn't implemented** - Variables not accessible

## Current Test Status

### **Basic Test Run Result:**
```
ERROR: test_agent_block_basic_execution
Syntax error at token 'must' (line 1)
RuntimeError: Undefined variable 'result'
```

This confirms:
1. ✅ Tests are failing as expected (TDD approach)
2. ✅ Parser needs to be extended to support `must/should` syntax
3. ✅ Interpreter needs agent block execution implementation
4. ✅ Existing functionality remains unaffected

## Implementation Roadmap

These tests will guide implementation of:

1. **Grammar Extensions**
   - Add `must` and `should` keywords
   - Agent block syntax parsing
   - System prompt block parsing

2. **Interpreter Features**
   - Agent block execution engine
   - System prompt synthesis
   - Implicit variable resolution
   - Real API integration

3. **Integration Features**
   - Then chaining with agent blocks
   - Error handling and recovery
   - Variable scope management

## Files Modified

- `/Users/lydakis/Developer/alloy/tests/test_interpreter.py` - Added `TestAgentBlockExecution` class with 25 comprehensive tests

## Next Steps

1. Run all agent block tests to see current failure patterns
2. Extend grammar to support agent block syntax
3. Implement agent block execution in interpreter
4. Integrate real API calls
5. Verify tests pass incrementally

The comprehensive test suite is now ready to drive our TDD implementation of agent blocks! 🚀