Code refactor

Skill mhattingpete/claude-skills-marketplace/code-operations-plugin/skills/code-refactor

Claude Code Skills for software engineering workflows - Git automation, testing, and code review

Install

npx -y skills add mhattingpete/claude-skills-marketplace --skill code-refactor

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What its author says it does

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Perform bulk code refactoring operations like renaming variables/functions across files, replacing patterns, and updating API calls. Use when users request renaming identifiers, replacing deprecated code patterns, updating method calls, or making consistent changes across multiple locations.

SKILL.md

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Code Refactor

Systematic code refactoring across files. Auto-switches to execution mode for 10+ files (90% token savings).

Mode Selection

1-9 files: Use native tools (Grep + Edit with replace_all)
10+ files: Automatically use code-execution skill

Execution example (50 files):

from api.code_transform import rename_identifier
result = rename_identifier('.', 'oldName', 'newName', '**/*.py')
# Returns: {'files_modified': 50, 'total_replacements': 247}
# ~500 tokens vs ~25,000 tokens traditional

When to Use

"rename [identifier] to [new_name]"
"replace all [pattern] with [replacement]"
"refactor to use [new_pattern]"
"update all calls to [function/API]"
"convert [old_pattern] to [new_pattern]"

Core Workflow (Native Mode)

1. Find All Occurrences

Grep(pattern="getUserData", output_mode="files_with_matches")     # Find files
Grep(pattern="getUserData", output_mode="content", -n=true, -B=2, -A=2)  # Verify with context

2. Replace All Instances

Edit(
  file_path="src/api.js",
  old_string="getUserData",
  new_string="fetchUserData",
  replace_all=true
)

3. Verify Changes

Grep(pattern="getUserData", output_mode="files_with_matches")  # Should return none

Workflow Examples

Rename Function

Find: Grep(pattern="getUserData", output_mode="files_with_matches")
Count: "Found 15 occurrences in 5 files"
Replace in each file with replace_all=true
Verify: Re-run Grep
Suggest: Run tests

Replace Deprecated Pattern

Find: Grep(pattern="\\bvar\\s+\\w+", output_mode="content", -n=true)
Analyze: Check if reassigned (let) or constant (const)
Replace: Edit(old_string="var count = 0", new_string="let count = 0")
Verify: npm run lint

Update API Calls

Find: Grep(pattern="/api/auth/login", output_mode="content", -n=true)
Replace: Edit(old_string="'/api/auth/login'", new_string="'/api/v2/authentication/login'", replace_all=true)
Test: Recommend integration tests

Best Practices

Planning:

Find all instances first
Review context of each match
Inform user of scope
Consider edge cases (strings, comments)

Safe Process:

Search → Find all
Analyze → Verify appropriate
Inform → Tell user scope
Execute → Make changes
Verify → Confirm applied
Test → Suggest running tests

Edge Cases:

Strings/comments: Ask if should update
Exported APIs: Warn of breaking changes
Case sensitivity: Be explicit

Tool Reference

Edit with replace_all:

replace_all=true: Replace all occurrences
replace_all=false: Replace only first (or fail if multiple)
Must match EXACTLY (whitespace, quotes)

Grep patterns:

-n=true: Show line numbers
-B=N, -A=N: Context lines
-i=true: Case-insensitive
type="py": Filter by file type

Integration

test-fixing: Fix broken tests after refactoring
code-transfer: Move refactored code
feature-planning: Plan large refactorings