Find Unused Code

Find Unused Code

Analyzes codebase to identify commented-out code blocks, unused exports, unused functions, and unused test helpers. Uses parallel analysis agents for comprehensive coverage.

🎯 Purpose & Scope

What this command does NOT do:

• Delete any code (read-only analysis)
• Modify files
• Run tests
• Create new files

When to REJECT:

• Path doesn't exist
• Request to delete code (suggest manual review)
• Binary or non-code files targeted

🔄 Workflow

ultrathink: you'd perform the following steps

Step 1: Setup Analysis

1. Parse Arguments

   • Extract path from $ARGUMENTS (default: current directory)
   • Parse --exclude patterns
   • Validate path exists

2. Discover Files

   • Use Glob to find source files
   • Filter by exclude patterns
   • Group by file type

Step 2: Parallel Analysis

Launch three parallel analysis agents:

1. Commented Code Agent

   • Find multi-line comment blocks
   • Identify commented-out code patterns
   • Distinguish from documentation
   • Report locations and context

2. Unused Exports Agent

   • Find all exports in codebase
   • Trace import references
   • Identify unreferenced exports
   • Check for dynamic imports

3. Unused Test Helpers Agent

   • Find test utility functions
   • Check usage across test files
   • Identify orphaned fixtures
   • Report unused mocks

Step 3: Consolidate Results

1. Merge Findings

   • Combine agent reports
   • Remove duplicates
   • Categorize by severity

2. Prioritize

   • High: Unused exports (potential dead code)
   • Medium: Commented code blocks
   • Low: Unused test helpers

Step 4: Reporting

Output Format:

[✅] Command: find-unused $ARGUMENTS

## Summary
- Path scanned: [path]
- Files analyzed: [count]
- Commented blocks: [count]
- Unused exports: [count]
- Unused test helpers: [count]

## Findings

### 🔴 Unused Exports (High Priority)
- [file:line] `exportName` - No references found
- [file:line] `exportName` - Only internal use

### 🟡 Commented Code Blocks (Medium Priority)
- [file:line] - [N] lines of commented code
- [file:line] - [N] lines of commented code

### 🟢 Unused Test Helpers (Low Priority)
- [file:line] `helperName` - No test references
- [file:line] `fixtureName` - Unused fixture

## Recommendations
1. Review unused exports for potential removal
2. Delete or restore commented code blocks
3. Clean up unused test helpers

## Next Steps
- Review findings manually
- Remove confirmed dead code
- Update tests if needed

📝 Examples

Scan Entire Project

/find-unused
# Analyzes all code in current directory

Scan Specific Directory

/find-unused "src/services/"
# Focuses analysis on services directory

Exclude Patterns

/find-unused "src/" --exclude="*.test.ts"
# Excludes test files from analysis

Error Case

/find-unused "nonexistent/"
# Error: Path 'nonexistent/' does not exist
# Suggestion: Check path with 'ls' or use '.' for current directory