React Audit Grep Patterns

If you're auditing a React codebase before upgrading to 18.3.1 or 19, this is your grep command reference library. It catalogs every scan pattern you need to find deprecated APIs, unsafe lifecycle methods, async setState patterns, and React 19 specific removals. The skill emphasizes not relying on memory for grep syntax, especially for tricky multi-line patterns that need context flags. It's organized into four reference files covering React 18 scans, React 19 scans, test-specific issues, and dependency conflicts. Essentially a cheat sheet to avoid fumbling with grep flags while running migration audits.

skills.sh installs: 884
GitHub stars: 41K
last updated: Aug 21, 2026

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Install

$ npx -y skills add github/awesome-copilot --skill react-audit-grep-patterns --agent claude-code

Installs into .claude/skills of the current project.

Files

React Audit Grep Patterns

Complete scan command library for React 18.3.1 and React 19 migration audits.

Usage

Read the relevant section for your target:

references/react18-scans.md - all scans for React 16/17 → 18.3.1 audit
references/react19-scans.md - all scans for React 18 → 19 audit
references/test-scans.md - test file specific scans (used by both auditors)
references/dep-scans.md - dependency and peer conflict scans

Base Patterns Used Across All Scans

# Standard flags used throughout:
# -r = recursive
# -n = show line numbers
# -l = show filenames only (for counting affected files)
# --include="*.js" --include="*.jsx" = JS/JSX files only
# | grep -v "\.test\.\|\.spec\.\|__tests__" = exclude test files
# | grep -v "node_modules" = safety (usually handled by not scanning node_modules)
# 2>/dev/null = suppress "no files found" errors

# Source files only (exclude tests):
SRC_FLAGS='--include="*.js" --include="*.jsx"'
EXCLUDE_TESTS='grep -v "\.test\.\|\.spec\.\|__tests__"'

# Test files only:
TEST_FLAGS='--include="*.test.js" --include="*.test.jsx" --include="*.spec.js" --include="*.spec.jsx"'

SKILL.md on GitHub