Linter Autofix Patterns
Quick reference for running linter autofixes across languages.
Autofix Commands
Language Linter Autofix Command
TypeScript/JS biome npx @biomejs/biome check --write .
TypeScript/JS biome format npx @biomejs/biome format --write .
Python ruff ruff check --fix .
Python ruff format ruff format .
Rust clippy cargo clippy --fix --allow-dirty
Rust rustfmt cargo fmt
Go gofmt gofmt -w .
Go go mod go mod tidy
Shell shellcheck No autofix (manual only)
Common Fix Patterns
JavaScript/TypeScript (Biome)
Unused imports
// Before import { useState, useEffect, useMemo } from 'react'; // Only useState used
// After import { useState } from 'react';
Prefer const
// Before let x = 5; // Never reassigned
// After const x = 5;
Python (Ruff)
Import sorting (I001)
Before
import os from typing import List import sys
After
import os import sys from typing import List
Unused imports (F401)
Before
import os import sys # unused
After
import os
Line too long (E501)
Before
result = some_function(very_long_argument_one, very_long_argument_two, very_long_argument_three)
After
result = some_function( very_long_argument_one, very_long_argument_two, very_long_argument_three, )
Rust (Clippy)
Redundant clone
// Before let s = String::from("hello").clone();
// After let s = String::from("hello");
Use if let
// Before match option { Some(x) => do_something(x), None => {}, }
// After if let Some(x) = option { do_something(x); }
Shell (ShellCheck)
Quote variables (SC2086)
Before
echo $variable
After
echo "$variable"
Use $(...) instead of backticks (SC2006)
Before
result=command
After
result=$(command)
Quick Autofix (Recommended)
Auto-detect project linters and run all appropriate fixers in one command:
Fix mode: detect linters and apply all autofixes
bash "${CLAUDE_PLUGIN_ROOT}/skills/linter-autofix/scripts/detect-and-fix.sh"
Check-only mode: report issues without fixing
bash "${CLAUDE_PLUGIN_ROOT}/skills/linter-autofix/scripts/detect-and-fix.sh" --check-only
The script detects biome, eslint, prettier, ruff, black, clippy, rustfmt, gofmt, golangci-lint, and shellcheck. It reports which linters were found, runs them, and shows modified files. See scripts/detect-and-fix.sh for details.
Manual Workflow
-
Run autofix first: ruff check --fix . && ruff format .
-
Check remaining issues: ruff check .
-
Manual fixes for complex cases
-
Verify: re-run linter to confirm clean
When to Escalate
Stop and use different approach when:
-
Fix requires understanding business logic
-
Multiple files need coordinated changes
-
Warning indicates potential bug (not just style)
-
Security-related linter rule
-
Type error requires interface/API changes