Use config_reader.py and
config_reader.ts to read only the specific environment
variables this skill needs (HOME, PORT, LOG_LEVEL, NODE_ENV) via
targeted accessors. The setup.sh helper uses set -euo pipefail
and only targeted lookups such as printenv PATH. The
filter-env.sh helper keeps a documented public prefix with
grep instead of dumping the complete environment.
This skill never enumerates or serialises the whole environment; it does not
call os.environ.items() or pipe unfiltered env to another command.