before-refactor

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Safety check before refactoring - shows callers, callees, and impact analysis

Changelog: Source: GitHub https://github.com/gitkb/meta

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SKILL.md

---
name: before-refactor
description: Safety check before refactoring - shows callers, callees, and impact analysis
allowed-tools:
  - mcp__gitkb__kb_callers
  - mcp__gitkb__kb_callees
  - mcp__gitkb__kb_impact
  - mcp__gitkb__kb_symbols
  - mcp__gitkb__kb_symbol_refs
---

# /before-refactor <symbol>

Safety check before modifying a function, method, or type. Shows all call sites that would need updates if you change the signature, plus impact analysis.

## When to Use

- Before changing a function signature
- Before renaming a public symbol
- Before modifying an interface or type's fields
- Before any change that could break callers

## Steps

1. **Find the symbol and its location:**
   ```
   kb_symbols with search: "<symbol-name>"
   ```

2. **Get all callers (who would break if you change the signature):**
   ```
   kb_callers with symbol: "<full-symbol-id>"
   ```

3. **Get callees (what this function depends on):**
   ```
   kb_callees with symbol: "<full-symbol-id>"
   ```

4. **Run impact analysis on the file:**
   ```
   kb_impact with file_path: "<file-path>"
   ```

5. **Check for related documents:**
   ```
   kb_symbol_refs with symbol: "<full-symbol-id>"
   ```

## Output Format

```
## Refactor Safety Check: `symbolName()`

### Location
- File: src/services/auth.ts:45-67
- Kind: function
- Signature: `async function symbolName(param: Type): Promise<Result>`

### Direct Callers (5)
These will break if you change the signature:
  - src/routes/auth.ts:45 -> handleRequest()
  - src/routes/auth.ts:89 -> handleRefresh()
  - src/middleware/auth.ts:22 -> authenticate()
  - tests/auth.test.ts:15 -> testLogin()
  - tests/integration.test.ts:88 -> testFullFlow()

### Transitive Impact
- 12 symbols transitively depend on this
- Affects 4 files

### What This Calls
  - src/db/users.ts::findUser()
  - src/crypto/tokens.ts::generateToken()

### Related Documents
  - tasks/my-task (Related Task)

### Recommendation

[LOW|MEDIUM|HIGH] impact refactor:
- LOW: 0-2 callers, all in same module
- MEDIUM: 3-10 callers, multiple modules
- HIGH: 10+ callers or public API surface

Files that need updates if signature changes:
1. src/routes/auth.ts
2. src/middleware/auth.ts
3. tests/auth.test.ts
4. tests/integration.test.ts
```

## Example

**Input:** `/before-refactor login`

**Output:**
```
## Refactor Safety Check: `login()`

### Location
- File: src/services/auth.ts:45-67
- Kind: function

### Direct Callers (3)
These will break if you change the signature:
  - src/routes/auth.ts:45 -> handleRequest()
  - src/routes/auth.ts:89 -> handleRefresh()
  - src/middleware/auth.ts:22 -> authenticate()

### Transitive Impact
- 8 symbols transitively depend on this
- Affects 3 files

### Recommendation

MEDIUM impact refactor.

Files that need updates if signature changes:
1. src/routes/auth.ts
2. src/middleware/auth.ts
```

## Prerequisites

Code must be indexed first:
```bash
git kb index
```

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