1 files changed, 28 insertions, 2 deletions
diff --git a/src/modal.zig b/src/modal.zig
index 424421f6..33c63c52 100644
--- a/src/modal.zig
+++ b/src/modal.zig
@@ -1171,6 +1171,27 @@ pub fn hxIndentString(line: []const u8) []const u8 {
     return max[0..@min(level * INDENT_W, max.len)];
 }
 
+/// Indent width for an inserted newline. Keep the current full indent levels,
+/// then add one logical tab after a simple delimiter-shaped line ending.
+/// `)` intentionally includes both ordinary calls and the requested `})`
+/// continuation shape; this is syntax-agnostic and does not try to parse.
+pub fn hxNewlineIndentWidth(line: []const u8, col: usize) usize {
+    const prefix = std.mem.trimEnd(u8, line[0..@min(col, line.len)], " \t");
+    const extra = if (prefix.len == 0) false else switch (prefix[prefix.len - 1]) {
+        '(', '[', '{', ')' => true,
+        else => false,
+    };
+    return hxIndentString(line).len + @as(usize, if (extra) INDENT_W else 0);
+}
+
+test "newline indent keeps levels and adds one after delimiters" {
+    try std.testing.expectEqual(@as(usize, 4), hxNewlineIndentWidth("    value", 9));
+    try std.testing.expectEqual(@as(usize, 8), hxNewlineIndentWidth("    call()", 10));
+    try std.testing.expectEqual(@as(usize, 8), hxNewlineIndentWidth("    callback({})   ", 16));
+    try std.testing.expectEqual(@as(usize, 4), hxNewlineIndentWidth("work(", 5));
+    try std.testing.expectEqual(@as(usize, 4), hxNewlineIndentWidth("list[tail", 5));
+}
+
 /// helix Ctrl-a / Ctrl-x: increment the SELECTED text as a decimal integer.
 /// Zero-padding is preserved (width follows sign flips, helix-style).
 /// Ponytail: no 0x/0o/0b bases, no '_' separators — decimal only.
@@ -1530,8 +1551,13 @@ fn stepInsertFile(alloc: std.mem.Allocator, content: []const u8, st: *FileState,
             return new;
         },
         .enter => {
-            const new = try insertAt(alloc, content, st.cur, "\n");
-            st.cur = .{ .row = st.cur.row + 1, .col = 0 };
+            const indent = hxNewlineIndentWidth(lineSlice(content, st.cur.row), st.cur.col);
+            const block = try alloc.alloc(u8, 1 + indent);
+            defer alloc.free(block);
+            block[0] = '\n';
+            @memset(block[1..], ' ');
+            const new = try insertAt(alloc, content, st.cur, block);
+            st.cur = .{ .row = st.cur.row + 1, .col = indent };
             st.pending = 0;
             return new;
         },