Raise ulimit headroom

Closes #1758

install/config/all.sh

@@ -8,6 +8,7 @@ run_logged $OMARCHY_INSTALL/config/increase-sudo-tries.sh
 run_logged $OMARCHY_INSTALL/config/increase-lockout-limit.sh
 run_logged $OMARCHY_INSTALL/config/ssh-flakiness.sh
 run_logged $OMARCHY_INSTALL/config/increase-file-watchers.sh
+run_logged $OMARCHY_INSTALL/config/increase-fd-limit.sh
 run_logged $OMARCHY_INSTALL/config/detect-keyboard-layout.sh
 run_logged $OMARCHY_INSTALL/config/xcompose.sh
 run_logged $OMARCHY_INSTALL/config/mise-work.sh

install/config/increase-fd-limit.sh

@@ -0,0 +1,11 @@
+# Raise soft file descriptor limit from systemd's default of 1024 to 65536
+# so dev tools (VS Code, Docker, dev servers, databases) get the headroom they need
+sudo mkdir -p /etc/systemd/system.conf.d /etc/systemd/user.conf.d
+
+sudo tee /etc/systemd/system.conf.d/99-omarchy-nofile.conf >/dev/null <<'EOF'
+[Manager]
+DefaultLimitNOFILESoft=65536
+EOF
+
+sudo cp /etc/systemd/system.conf.d/99-omarchy-nofile.conf \
+        /etc/systemd/user.conf.d/99-omarchy-nofile.conf

migrations/1777813290.sh

@@ -0,0 +1,3 @@
+echo "Raise soft file descriptor limit so dev tools have headroom (takes effect after reboot)"
+
+bash $OMARCHY_PATH/install/config/increase-fd-limit.sh