rust-refactor-helper

# Rust Refactor Helper

Perform safe refactoring with comprehensive impact analysis.

## Usage

```
/rust-refactor-helper <action> <target> [--dry-run]
```

**Actions:**
- `rename <old> <new>` - Rename symbol
- `extract-fn <selection>` - Extract to function
- `inline <fn>` - Inline function
- `move <symbol> <dest>` - Move to module

**Examples:**
- `/rust-refactor-helper rename parse_config load_config`
- `/rust-refactor-helper extract-fn src/main.rs:20-35`
- `/rust-refactor-helper move UserService src/services/`

## LSP Operations Used

### Pre-Refactor Analysis

```
# Find all references before renaming
LSP(
  operation: "findReferences",
  filePath: "src/lib.rs",
  line: 25,
  character: 8
)

# Get symbol info
LSP(
  operation: "hover",
  filePath: "src/lib.rs",
  line: 25,
  character: 8
)

# Check call hierarchy for move operations
LSP(
  operation: "incomingCalls",
  filePath: "src/lib.rs",
  line: 25,
  character: 8
)
```

## Refactoring Workflows

### 1. Rename Symbol

```
User: "Rename parse_config to load_config"
    │
    ▼
[1] Find symbol definition
    LSP(goToDefinition)
    │
    ▼
[2] Find ALL references
    LSP(findReferences)
    │
    ▼
[3] Categorize by file
    │
    ▼
[4] Check for conflicts
    - Is 'load_config' already used?
    - Are there macro-generated uses?
    │
    ▼
[5] Show impact analysis (--dry-run)
    │
    ▼
[6] Apply changes with Edit tool
```

**Output:**

```
## Rename: parse_config → load_config

### Impact Analysis

**Definition:** src/config.rs:25
**References found:** 8

| File | Line | Context | Change |
|------|------|---------|--------|
| src/config.rs | 25 | `pub fn parse_config(` | Definition |
| src/config.rs | 45 | `parse_config(path)?` | Call |
| src/main.rs | 12 | `config::parse_config` | Import |
| src/main.rs | 30 | `let cfg = parse_config(` | Call |
| src/lib.rs | 8 | `pub use config::parse_config` | Re-export |
| tests/config_test.rs | 15 | `parse_config("test.toml")` | Test |
| tests/config_test.rs | 25 | `