code-refactor

# 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):**
```python
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
1. Find: `Grep(pattern="getUserData", output_mode="files_with_matches")`
2. Count: "Found 15 occurrences in 5 files"
3. Replace in each file with `replace_all=true`
4. Verify: Re-run Grep
5. Suggest: Run tests

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

### Update API Calls
1. Find: `Grep(pattern="/api/auth/login", output_mode="content", -n=true)`
2. Replace: `Edit(old_string="'/api/auth/login'", new_string="'/api/v2/authentication/login'", replace_all=true)`
3. Test