"""
constants — shared project-wide constants.

Single source of truth for values that multiple managers must agree on.
"""

# Core PIC infrastructure subdomains — never allow store services to hijack these.
# 'mail', 'calendar', 'files', 'webdav', 'webmail' are intentionally absent:
# they belong to official PIC store services and must be claimable by them.
RESERVED_SUBDOMAINS = frozenset({
    'api', 'webui', 'admin', 'www', 'ns1', 'ns2',
    'git', 'registry', 'install',
})