claude-code-system-prompts/system-prompts/tool-description-edit-single-replacement.md
2026-06-12 10:12:09 -06:00

714 B

Performs exact string replacement in a file.

  • You must ${READ_TOOL_NAME} the file in this conversation before editing, or the call will fail.
  • old_string must match the file exactly, including indentation, and be unique — the edit fails otherwise. Strip the Read line prefix (${SUPPORTS_COLON_LINE_PREFIX?"line number + a single tab or :":"line number + tab"}) before matching.
  • replace_all: true replaces every occurrence instead.