Rule: New feature introduced (new-feature)

[ddjain]

Rule: New Feature Detection

Overview

Identifies when new functionality is added (new functions, classes, modules).

Label Metadata

• Label Name: new-feature
• Color: 2ea44f (Green)
• Description: New feature/functionality added

Detection Logic

Analyze diff for new function/class/module additions:

Patterns to detect:

• New function definitions: +function, +def, +fn
• New class definitions: +class, +struct
• New exports: +export function, +export class
• Significant additions (>100 lines) in new files

Heuristics

• High ratio of additions vs deletions (>70% additions)
• New files created with substantial code
• New function/class definitions detected
• Threshold: Default 50+ lines of net additions

Example Code That Triggers

+ function newFeature() {
+   // 50+ lines of new code
+ }
+
+ export class NewComponent {
+   // new class implementation
+ }

Example Code That Does NOT Trigger

• Only deletions (removing code)
• Refactoring (same functionality)
• Small bug fixes (<10 lines)

Test Cases Needed

• Detects new function definitions
• Detects new class definitions
• Detects new exports
• Handles large new files
• Ignores small additions (bug fixes)
• Distinguishes from refactoring

Edge Cases

• Large refactor with some new code mixed
• Feature flag enabling existing code
• New tests only (should be test-improvement)

Integration Notes

• Useful for tracking feature development
• May combine with large-pr for comprehensive analysis
• Consider excluding test files from line count

Priority

Medium - Useful for feature tracking

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Status: Not implemented
Category: Logic, Refactor & Naming