Engine

---
name: "engine"
version: "1.0.0"
description: "Rule engine reference — decision tables, Rete algorithm, forward/backward chaining, and business rule management. Use when evaluating business rules, building decision trees, or implementing policy engines."
author: "BytesAgain"
homepage: "https://bytesagain.com"
source: "https://github.com/bytesagain/ai-skills"
tags: [engine, rules, decision-table, rete, workflow, policy, devtools]
category: "devtools"
---

# Engine — Rule Engine & Decision Logic Reference

Quick-reference skill for rule engines, decision tables, and business rule patterns.

## When to Use

- Implementing business rules that change frequently
- Building decision trees or scoring systems
- Choosing between rule engine approaches
- Designing policy engines for access control or pricing
- Separating business logic from application code

## Commands

### `intro`

```bash
scripts/script.sh intro
```

Overview of rule engines — types, benefits, when to use.

### `patterns`

```bash
scripts/script.sh patterns
```

Rule engine patterns — forward chaining, backward chaining, Rete.

### `tables`

```bash
scripts/script.sh tables
```

Decision tables — structure, completeness, and implementation.

### `dsl`

```bash
scripts/script.sh dsl
```

Domain-specific languages for rules — syntax approaches and examples.

### `tools`

```bash
scripts/script.sh tools
```

Rule engine tools — Drools, OPA, json-rules-engine, and more.

### `scoring`

```bash
scripts/script.sh scoring
```

Scoring and ranking engines — weighted rules, multi-criteria decisions.

### `testing`

```bash
scripts/script.sh testing
```

Testing rule engines — coverage, conflict detection, regression.

### `checklist`

```bash
scripts/script.sh checklist
```

Rule engine implementation checklist.

### `help`

```bash
scripts/script.sh help
```

### `version`

```bash
scripts/script.sh version
```

## Configuration

| Variable | Description |
|----------|-------------|
| `ENGINE_DIR` | Data directory (default: ~/.engine/) |

---

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