rust-refactor-helper
Safe Rust refactoring with LSP analysis. Triggers on: /refactor, rename symbol, move function, extract, 重构, 重命名, 提取函数, 安全重构
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/actionbook/rust-skills --skill rust-refactor-helper- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads rust-refactor-helper automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Rust Refactor Helper
Perform safe refactoring with comprehensive impact analysis.
Usage
/rust-refactor-helper <action> <target> [--dry-run]
Actions:
rename <old> <new>- Rename symbolextract-fn <selection>- Extract to functioninline <fn>- Inline functionmove <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 | `parse_config("")` | Test |
| docs/api.md | 42 | `parse_config` | Documentation |
### Potential Issues
⚠️ **Documentation reference:** docs/api.md:42 may need manual update
⚠️ **Re-export:** src/lib.rs:8 - public API change
### Proceed?
- [x] --dry-run (preview only)
- [ ] Apply changes
2. Extract Function
User: "Extract lines 20-35 in main.rs to a function"
│
▼
[1] Read the selected code block
│
▼
[2] Analyze variables
- Which are inputs? (used but not defined in block)
- Which are outputs? (defined and used after block)
- Which are local? (defined and used only in block)
│
▼
[3] Determine function signature
│
▼
[4] Check for early returns, loops, etc.
│
▼
[5] Generate extracted function
│
▼
[6] Replace original code with call
Output:
## Extract Function: src/main.rs:20-35
### Selected Code
```rust
let file = File::open(&path)?;
let mut contents = String::new();
file.read_to_string(&mut contents)?;
let config: Config = toml::from_str(&contents)?;
validate_config(&config)?;
```
### Analysis
**Inputs:** path: &Path
**Outputs:** config: Config
**Side Effects:** File I/O, may return error
### Extracted Function
```rust
fn load_and_validate_config(path: &Path) -> Result<Config> {
let file = File::open(path)?;
let mut contents = String::new();
file.read_to_string(&mut contents)?;
let config: Config = toml::from_str(&contents)?;
validate_config(&config)?;
Ok(config)
}
```
### Replacement
```rust
let config = load_and_validate_config(&path)?;
```
3. Move Symbol
User: "Move UserService to src/services/"
│
▼
[1] Find symbol and all its dependencies
│
▼
[2] Find all references (callers)
LSP(findReferences)
│
▼
[3] Analyze import changes needed
│
▼
[4] Check for circular dependencies
│
▼
[5] Generate move plan
Output:
## Move: UserService → src/services/user.rs
### Current Location
src/handlers/auth.rs:50-120
### Dependencies (will be moved together)
- struct UserService (50-80)
- impl UserService (82-120)
- const DEFAULT_TIMEOUT (48)
### Import Changes Required
| File | Current | New |
|------|---------|-----|
| src/main.rs | `use handlers::auth::UserService` | `use services::user::UserService` |
| src/handlers/api.rs | `use super::auth::UserService` | `use crate::services::user::UserService` |
| tests/auth_test.rs | `use crate::handlers::auth::UserService` | `use crate::services::user::UserService` |
### New File Structure
```
src/
├── services/
│ ├── mod.rs (NEW - add `pub mod user;`)
│ └── user.rs (NEW - UserService moved here)
├── handlers/
│ └── auth.rs (UserService removed)
```
### Circular Dependency Check
✅ No circular dependencies detected
Safety Checks
| Check | Purpose |
|---|---|
| Reference completeness | Ensure all uses are found |
| Name conflicts | Detect existing symbols with same name |
| Visibility changes | Warn if pub/private scope changes |
| Macro-generated code | Warn about code in macros |
| Documentation | Flag doc comments mentioning symbol |
| Test coverage | Show affected tests |
Dry Run Mode
Always use --dry-run first to preview changes:
/rust-refactor-helper rename old_name new_name --dry-run
This shows all changes without applying them.
Related Skills
| When | See |
|---|---|
| Navigate to symbol | rust-code-navigator |
| Understand call flow | rust-call-graph |
| Project structure | rust-symbol-analyzer |
| Trait implementations | rust-trait-explorer |
FAQ
What does the rust-refactor-helper skill do?
Safe Rust refactoring with LSP analysis. Triggers on: /refactor, rename symbol, move function, extract, 重构, 重命名, 提取函数, 安全重构
How do I install rust-refactor-helper?
Run npx skills add https://github.com/actionbook/rust-skills --skill rust-refactor-helper in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/rust-refactor-helper/ (personal) or .claude/skills/rust-refactor-helper/ (project).
Which AI agents can use rust-refactor-helper?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is rust-refactor-helper safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains rust-refactor-helper?
It is published by actionbook in actionbook/rust-skills. It has 3,363 recorded installs.
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