Dead Code Eliminator Skill Skill

Dead Code Eliminator Skill

Identifies and safely removes dead code, unused functions, unreachable code paths, and orphaned files from codebases to reduce complexity and maintenance burden.

Purpose

Enable safe dead code removal for:

Codebase simplification
Migration preparation
Technical debt reduction
Build size optimization
Maintenance cost reduction

Capabilities

1. Unused Function Detection

Find uncalled functions
Identify unused exports
Detect unreferenced methods
Map call graphs

2. Unreachable Code Identification

Analyze control flow
Find code after returns
Detect impossible conditions
Identify dead branches

3. Unused Variable Detection

Find unread variables
Identify write-only variables
Detect unused parameters
Flag shadowed variables

4. Orphan File Detection

Find unimported modules
Identify orphaned assets
Detect unused configuration
Map file dependencies

5. Safe Removal Verification

Verify no runtime references
Check dynamic imports
Validate reflection usage
Test after removal

6. Impact Analysis

Estimate removal scope
Calculate size reduction
Assess risk level
Document dependencies

Tool Integrations

| Tool | Language | Integration Method | |------|----------|-------------------| | ts-prune | TypeScript | CLI | | unimported | JavaScript | CLI | | deadcode | Python | CLI | | UCDetector | Java | Eclipse Plugin | | unused | Rust | CLI | | deadcode | Go | CLI | | webpack-bundle-analyzer | JavaScript | CLI |

Output Schema

{
  "analysisId": "string",
  "timestamp": "ISO8601",
  "deadCode": {
    "functions": [
      {
        "file": "string",
        "name": "string",
        "line": "number",
        "confidence": "high|medium|low",
        "reason": "string"
      }
    ],
    "variables": [],
    "files": [],
    "unreachable": []
  },
  "impact": {
    "filesAffected": "number",
    "linesRemovable": "number",
    "estimatedSizeReduction": "string"
  },
  "risks": [],
  "recommendations": []
}

Integration with Migration Processes

code-refactoring: Pre-refactoring cleanup
legacy-decommissioning: Feature removal
monolith-to-microservices: Service extraction prep

Related Skills

static-code-analyzer: Combined analysis
code-smell-detector: Related smell detection

Related Agents

legacy-decommissioning-specialist: Uses for cleanup
code-transformation-executor: Executes removal

Agent Skills: Dead Code Eliminator Skill

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