# logging_monitoring - Functional Specification

**Version**: v1.2.3 | **Status**: Active | **Last Updated**: March 2026

## Purpose

Foundation module providing centralized logging infrastructure for the Codomyrmex platform. Implements unified logging system with consistent formatting, configurable output destinations, and proper log level management.

## Design Principles

### Modularity

- Self-contained logging system
- Clear interface boundaries
- Minimal external dependencies
- Composable logging components

### Internal Coherence

- Consistent log formatting
- Unified configuration interface
- Standardized log levels
- Logical component organization

### Parsimony

- Essential logging features only
- Minimal configuration surface
- Direct implementations
- Focus on core functionality

### Functionality

- Working logging system
- Practical configuration options
- Current best practices
- Reliable log delivery

### Testing

- Comprehensive test coverage
- Configuration validation tests
- Output format verification
- Integration testing

### Documentation

- Clear API documentation
- Configuration examples
- Usage patterns
- Complete specifications

## Architecture

```mermaid
graph TD
    subgraph sg_b332c3492d [Configuration]
        EnvVars[Environment Variables]
        ConfigFile[Configuration File]
    end

    subgraph sg_d155bc7da9 [Core System]
        Setup[setup_logging()]
        GetLogger[get_logger()]
        LogContext[LogContext]
    end

    subgraph sg_e5d5a0063a [Output Layer]
        Console[Console Handler]
        File[File Handler]
        JSON[JSONFormatter]
        Text[Text Formatter]
    end

    EnvVars --> Setup
    ConfigFile --> Setup
    Setup --> GetLogger
    GetLogger --> LogContext
    Setup --> Console
    Setup --> File
    Console --> JSON
    Console --> Text
    File --> JSON
    File --> Text
```

## Functional Requirements

### Core Capabilities

1. **Logging Setup**: Initialize and configure logging system
2. **Logger Factory**: Provide logger instances for modules
3. **Structured Logging**: JSON format for machine-readable logs
4. **Text Logging**: Human-readable text format
5. **Context Management**: Correlation IDs and context injection

### Configuration

- Environment variable configuration
- Optional configuration file support
- Log level management
- Output destination control

## Quality Standards

### Code Quality

- Type hints for all functions
- Clear error handling
- PEP 8 compliance
- Comprehensive docstrings

### Testing Standards

- ≥80% test coverage
- Configuration validation tests
- Output format verification
- Integration tests

### Documentation Standards

- Complete API documentation
- Configuration examples
- Usage patterns
- Integration guides

## Interface Contracts

### Public API

- `setup_logging()` - Initialize logging system with support for "TEXT" and "JSON" outputs.
- `get_logger(name)` - Get logger instance.
- `JSONFormatter` - Standardized JSON log formatter (legacy `JsonFormatter` alias removed).
- `log_with_context()` - Log with structured context.
- `LogContext` - Context manager for correlation IDs.

### Configuration Interface

- Environment variables: `CODOMYRMEX_LOG_*`
- Optional configuration file
- Standard Python logging integration

## Implementation Guidelines

### Usage Patterns

1. Call `setup_logging()` at application start
2. Use `get_logger(__name__)` in modules
3. Use `LogContext` for request tracing
4. Configure via environment variables

### Integration

- All modules depend on this module
- Foundation layer service
- Minimal dependencies
- Stable API

## Navigation

- **Human Documentation**: [README.md](README.md)
- **Technical Documentation**: [AGENTS.md](AGENTS.md)
- **Package Root**: [../README.md](../README.md)
- **Package SPEC**: [../SPEC.md](../SPEC.md)

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