@@ -97,21 +97,32 @@
    @Override
    public void onPlace(BlockState state, Level level, BlockPos pos, BlockState oldState, boolean movedByPiston) {
        super.onPlace(state, level, pos, oldState, movedByPiston);
        // Scan for multi-block groups when a terminal block is placed.
        // Rescan THIS block AND all adjacent terminal blocks so the entire
        // group forms correctly regardless of placement order.
        System.out.println("[AlacrittyMC] onPlace at " + pos + " side=" + (level.isClientSide() ? "CLIENT" : "SERVER"));
        BlockEntity be = level.getBlockEntity(pos);
        if (be instanceof TerminalBlockEntity terminalBE) {
            terminalBE.rescanGroup();
            System.out.println("[AlacrittyMC]   self rescan: group=" + (terminalBE.getScreenGroup() != null
                    ? terminalBE.getScreenGroup().getGridCols() + "x" + terminalBE.getScreenGroup().getGridRows()
                    : "none") + " ext=" + terminalBE.isExtension() + " cols=" + terminalBE.getCols());
        } else {
            System.out.println("[AlacrittyMC]   NO block entity at " + pos);
        }
        // Also rescan all 4 horizontal neighbors + up/down
        int neighborCount = 0;
        for (Direction dir : new Direction[]{Direction.NORTH, Direction.SOUTH, Direction.EAST, Direction.WEST, Direction.UP, Direction.DOWN}) {
            BlockPos neighbor = pos.relative(dir);
            BlockEntity neighborBE = level.getBlockEntity(neighbor);
            if (neighborBE instanceof TerminalBlockEntity neighborTBE) {
                neighborTBE.rescanGroup();
                neighborCount++;
                System.out.println("[AlacrittyMC]   neighbor " + dir + " at " + neighbor
                        + ": group=" + (neighborTBE.getScreenGroup() != null
                        ? neighborTBE.getScreenGroup().getGridCols() + "x" + neighborTBE.getScreenGroup().getGridRows()
                        : "none") + " ext=" + neighborTBE.isExtension() + " cols=" + neighborTBE.getCols());
            }
        }
        System.out.println("[AlacrittyMC]   " + neighborCount + " terminal neighbors found");
    }
    @Override

@@ -83,5 +83,8 @@
     */
    public void rescanGroup() {
        if (level == null) return;
        // Reset lazy scan flag so the client re-evaluates
        clientGroupScanned = false;
        clientTickCount = 0;
        ScreenGroup group = ScreenGroup.scan(level, getBlockPos());
@@ -233,7 +236,25 @@
        }
    }
    // Client tick counter for lazy group detection
    private int clientTickCount = 0;
    private boolean clientGroupScanned = false;
    public static void clientTick(Level level, BlockPos pos, BlockState state, TerminalBlockEntity be) {
        be.clientTickCount++;
        // Lazy client-side group detection: onPlace only fires on the server,
        // so the client needs to discover groups itself. Rescan periodically
        // until a stable group is found, then stop scanning.
        if (!be.clientGroupScanned && be.clientTickCount % 10 == 0) {
            be.rescanGroup();
            // Stop scanning once we've had a few chances to find neighbors
            if (be.clientTickCount > 60) {
                be.clientGroupScanned = true;
            }
        }
        // Only the controller runs the terminal
        if (be.terminal == null || !be.terminalStarted) return;
        boolean alive = be.terminal.pollPty();
        if (!alive) {