[Unit]
Description=lchat links redirector (11ch.at short links)
After=network-online.target
Wants=network-online.target

[Service]
# No env file: unlike home/push this holds no secrets and no database — just
# an in-memory, TTL-bounded verification cache (see linkscmd.go).
ExecStart=/opt/lchat/lchat links run --socket /run/lchat/links.sock
Restart=always
RestartSec=1

# --- hardening (see docs/instance-router.md § Hardening) ---
User=lchat
Group=lchat
CapabilityBoundingSet=
NoNewPrivileges=yes
ProtectSystem=strict
ProtectHome=yes
ReadWritePaths=/run/lchat
PrivateTmp=yes
PrivateDevices=yes
ProtectClock=yes
ProtectHostname=yes
ProtectKernelTunables=yes
ProtectKernelModules=yes
ProtectKernelLogs=yes
ProtectControlGroups=yes
ProtectProc=invisible
RestrictAddressFamilies=AF_INET AF_INET6 AF_UNIX
RestrictNamespaces=yes
RestrictRealtime=yes
RestrictSUIDSGID=yes
LockPersonality=yes
MemoryDenyWriteExecute=yes
SystemCallFilter=@system-service
SystemCallErrorNumber=EPERM
SystemCallArchitectures=native
MemoryMax=256M
TasksMax=256

[Install]
WantedBy=multi-user.target