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**What to include:**

- Full command that was run
- All stdout and stderr output
- Exit code (if available)
- Timestamp and duration (if available)

src/file.ts:23:15 - error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'.

src/file.ts:12:7 warning 'variable' is defined but never used @typescript-eslint/no-unused-vars

ERROR in ./src/components/Button.tsx
Module not found: Error: Can't resolve '@/styles/button.css'

✘ [ERROR] Could not resolve "react-dom/client"

Input: "src/auth/login.ts:23:15 - error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'."

Extracted:
{
  file: "src/auth/login.ts",
  line: 23,
  column: 15,
  code: "TS2345",
  message: "Argument of type 'string' is not assignable to parameter of type 'number'",
  severity: "error",
  tool: "TypeScript"
}

Group 1: Type mismatch string→number (TS2345)
├─ src/auth/login.ts:23
├─ src/auth/register.ts:45
└─ src/auth/validate.ts:12
(4 occurrences)

Group 2: Cannot find name 'User' (TS2304)
└─ src/utils/validate.ts:12
(1 occurrence)

**Solution for TS2345 (Type Mismatch):**

1. Option A: Convert the value to expected type
   ```typescript
   calculate(Number(userId)); // string → number
   ```

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**Include:**

- Overall status (SUCCESS, SUCCESS WITH WARNINGS, FAILED)
- Total errors and warnings count
- Impact level
- Top 3 issues to address
- Quick recommendation

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[file]:[line]:[col] - [code]: [message]
[file]:[line]:[col] - [code]: [message]

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**Code context:**
```typescript
// src/auth/login.ts:23
function handleLogin(userId: string) {
  const result = calculate(userId);  // ❌ Error here
  //                        ^^^^^^
  //                        Type 'string' not assignable to 'number'
  return result;
}

function handleLogin(userId: string) {
	const result = calculate(Number(userId)); // ✅ Fixed
	return result;
}

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2. **Configure pre-commit hooks:**
   ```bash
   npm install --save-dev husky lint-staged
   npx husky add .husky/pre-commit "npm run lint"
   ```

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$ npm run build

> app@1.0.0 build
> tsc

src/auth/login.ts:23:15 - error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'.
src/auth/register.ts:45:20 - error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'.
src/utils/validate.ts:12:8 - error TS2304: Cannot find name 'User'.

Found 3 errors in 3 files.

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src/auth/login.ts:23:15 - error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'.
src/auth/register.ts:45:20 - error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'.

2. **Option B:** Update function to accept both types:

   ```typescript
   function calculate(id: string | number): Result {
   	const numericId = typeof id === "string" ? Number(id) : id;
   	// ...
   }
   ```

3. **Option C:** Update userId type at source:
   ```typescript
   const userId: number = getNumericUserId();
   ```

**Documentation:**

- [TypeScript Type Assertions](https://www.typescriptlang.org/docs/handbook/2/everyday-types.html#type-assertions)
- [Type Compatibility](https://www.typescriptlang.org/docs/handbook/type-compatibility.html)

---

src/utils/validate.ts:12:8 - error TS2304: Cannot find name 'User'.

import { User } from "@/types/user";
// or
import type { User } from "@/types/user";

git grep "export.*User" src/

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$ npm run build

> app@1.0.0 build
> eslint src/ && webpack

src/components/Button.tsx
  12:7  warning  'handleClick' is defined but never used  @typescript-eslint/no-unused-vars
  23:10 warning  'styles' is assigned a value but never used  @typescript-eslint/no-unused-vars

✖ 2 problems (0 errors, 2 warnings)
✖ 1 problem (0 errors, 1 warning) potentially fixable with the `--fix` option.

webpack compiled successfully in 8.2s

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src/components/Button.tsx:12:7 - warning: 'handleClick' is defined but never used (@typescript-eslint/no-unused-vars)
src/components/Button.tsx:23:10 - warning: 'styles' is assigned a value but never used (@typescript-eslint/no-unused-vars)

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**Manual fix:**
If the variables will be used later, prefix with underscore:

```typescript
// Before
const handleClick = () => { ... };  // ❌ Warning

// After
const _handleClick = () => { ... };  // ✅ No warning
```

Or simply remove if truly unused:

```typescript
// Just delete the unused lines
```

**Documentation:**

- [ESLint no-unused-vars](https://eslint.org/docs/latest/rules/no-unused-vars)
- [TypeScript ESLint no-unused-vars](https://typescript-eslint.io/rules/no-unused-vars/)

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