Grep

A powerful search tool built on ripgrep

Usage:

ALWAYS use Grep for search tasks. NEVER invoke grep or rg as a Bash command. The Grep tool has been optimized for correct permissions and access.
Supports full regex syntax (e.g., "log.*Error", "function\s+\w+")
Filter files with glob parameter (e.g., ".js", "**/.tsx") or type parameter (e.g., "js", "py", "rust")
Output modes: "content" shows matching lines, "files_with_matches" shows only file paths (default), "count" shows match counts
Use Task tool for open-ended searches requiring multiple rounds
Pattern syntax: Uses ripgrep (not grep) - literal braces need escaping (use interface\{\} to find interface{} in Go code)
Multiline matching: By default patterns match within single lines only. For cross-line patterns like struct \{[\s\S]*?field, use multiline: true
If the output exceeds 10,000 characters, it will be truncated before being returned to you