| # EXTRAS: optional or useful for development/developers workflow | 
 |  | 
 | # used by twister for --test-tree option | 
 | anytree | 
 |  | 
 | # helper for developers - check git commit messages | 
 | gitlint | 
 |  | 
 | # helper for developers | 
 | junit2html | 
 |  | 
 | # helper for developers - code formatter | 
 | clang-format>=1.13x | 
 |  | 
 | # Script used to build firmware images for NXP LPC MCUs. | 
 | lpc_checksum | 
 |  | 
 | # used by scripts/build/gen_cfb_font_header.py - helper script for user | 
 | Pillow | 
 |  | 
 | # can be used to sign a Zephyr application binary for consumption by a bootloader | 
 | imgtool>=1.9 | 
 |  | 
 | # used by nanopb module to generate sources from .proto files | 
 | grpcio-tools | 
 |  | 
 | # used by scripts/release/bug_bash.py for generating top ten bug squashers | 
 | PyGithub | 
 |  | 
 | # used to generate devicetree dependency graphs | 
 | graphviz |