legalis-diff

Statute diffing and change detection for Legalis-RS.

Overview

legalis-diff provides tools for comparing statute versions, detecting changes, and assessing the impact of legislative amendments.

Features

• Structural Diff: Compare statute structure (conditions, effects, metadata)
• Change Categorization: Classify changes as added, removed, or modified
• Impact Assessment: Evaluate severity of changes (minor, moderate, major, breaking)
• Change Reports: Generate human-readable diff reports

Usage

use legalis_diff::{StatuteDiff, DiffReport, ChangeType, ImpactLevel};
use legalis_core::Statute;

// Compare two statute versions
let old_statute = /* ... */;
let new_statute = /* ... */;

let diff = StatuteDiff::compare(&old_statute, &new_statute);

// Check for changes
if diff.has_changes() {
    println!("Changes detected:");

    for change in diff.changes() {
        match change.change_type {
            ChangeType::Added => println!("  + {}", change.description),
            ChangeType::Removed => println!("  - {}", change.description),
            ChangeType::Modified => println!("  ~ {}", change.description),
        }
    }
}

// Get impact assessment
let impact = diff.assess_impact();
match impact.level {
    ImpactLevel::Minor => println!("Minor changes"),
    ImpactLevel::Moderate => println!("Moderate changes"),
    ImpactLevel::Major => println!("Major changes - review required"),
    ImpactLevel::Breaking => println!("Breaking changes - full review required"),
}

Change Types

Impact Levels

CLI Integration

# Compare two statute files
legalis diff old.legalis new.legalis

# Output as JSON
legalis diff old.legalis new.legalis --format json

License

MIT OR Apache-2.0