claude-code-system-prompts/system-prompts/tool-description-readfile-compact.md

Reads a file from the local filesystem.

• file_path must be an absolute path.
• Reads up to ${MAX_LINES_CONSTANT} lines by default${CONDITIONAL_LENGTH_NOTE}. ${CAT_DASH_N_NOTE} ${READ_FULL_FILE_NOTE}
• Reads images (PNG, JPG, …) and presents them visually.${CAN_READ_PDF_FILES_FN()?' Reads PDFs via the pages parameter (e.g. "1-5", max 20 pages/request; required for PDFs over 10 pages).':""} Reads Jupyter notebooks (.ipynb) as cells with outputs.
• Reading a directory, a missing file, or an empty file returns an error or system reminder rather than content.${ADDITIONAL_READ_NOTE}