# Main Layer

> This layer encompasses the core functionality of the project, managing the primary modules and their interactions. Trigger: When working in main/ — adding, modifying, or debugging core functionalities.

- Skill: `jnzader/main-layer` (Agent Skill)
- Install (CLI): `npx skillmds@latest add jnzader/main-layer`
- Raw SKILL.md: https://api.skillmd.com/api/skills/jnzader/main-layer/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- License: Apache-2.0
- Author: JNZader (https://skillmd.com/u/jnzader)
- Updated: 2026-09-21
- Page: https://skillmd.com/skills/jnzader/main-layer

---


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# main-layer

This skill covers the core functionality and structure of the main layer.

**Trigger**: When working in main/ directory and its main responsibility.
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## Quick Reference

| Task | Pattern |
|------|---------|
| Create a new module | `eval/harness.py` |

## Critical Patterns (Summary)
- **Module Initialization**: Ensure proper path setup when running modules directly.
- **Data Adaptation**: Use adapters for valid target identifiers in the project.
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## Critical Patterns (Detailed)

### Module Initialization

Ensure proper path setup when running modules directly to avoid import errors.

```python
# eval/harness.py
import sys
import os

sys.path.append(os.path.dirname(os.path.abspath(__file__)))
```

### Data Adaptation

Utilize adapters to manage valid target identifiers, ensuring consistent data handling across modules.

```python
# repoforge/adapters.py
def adapt_for_cursor(data):
    # Adapt data for cursor usage
    pass
```

## When to Use

- When creating or modifying core modules that interact with the main functionality.
- When integrating new features that require adjustments to existing data handling.

## Commands

```bash
python -m eval.harness
```

## Anti-Patterns

### Don't: Modify core modules without testing

Changing core modules can lead to unexpected behavior across the project.

```python
# BAD
def broken_function():
    return undefined_variable
```
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