Rule: Function/class removed (function-removed)

[ddjain]

Rule: Function/Class Removal Detection

Overview

Identifies when functions, classes, or major code blocks are removed (not just refactored).

Label Metadata

• Label Name: function-removed
• Color: fbca04 (Yellow)
• Description: Functions or classes removed from codebase

Detection Logic

Analyze diff for removal of code structures:

Patterns to detect:

• Function removals: -function, -def, -fn
• Class removals: -class, -struct
• Export removals: -export function, -export class
• File deletions with substantial code

Heuristics

• High ratio of deletions vs additions (>70% deletions)
• Function/class definitions removed (not moved)
• Multiple removals detected

Example Code That Triggers

- function deprecatedFunction() {
-   // entire function removed
- }
-
- class OldComponent {
-   // entire class removed
- }

Example Code That Does NOT Trigger

• Function refactored (moved/renamed)
• Code refactored (same functionality)
• Small code cleanup

Test Cases Needed

• Detects function removals
• Detects class removals
• Detects export removals
• Handles file deletions
• Distinguishes from refactoring (rename)
• Ignores small code cleanup

Edge Cases

• Function extracted (moved) vs removed
• Deprecated functions (should still trigger)
• Temporary code removal for refactoring

Integration Notes

• Important for tracking breaking changes
• May want to combine with changelog generation
• Consider relationship with refactor rule

Priority

Medium - Important for change tracking

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Status: Not implemented
Category: Logic, Refactor & Naming