diff --git a/src/tui.zig b/src/tui.zig
index 72e59f1..04debea 100644
--- a/src/tui.zig
+++ b/src/tui.zig
@@ -325,14 +325,35 @@ comptime {
     }
 }
 
-// TODO(scoped-keybinds): comptime validator that tabs don't bind
-// keys already bound in the global keymap. Skipped in commit 1
-// because tabs (portfolio/options/history) currently declare Enter
-// as a tab-local binding for `expand_collapse` while Enter remains
-// globally bound. The validator gets added at the END of the
-// migration (after commit 8 removes the global Enter binding) so
-// it doesn't block intermediate commits. Runtime check on user
-// keys.srf still rejects conflicts at TUI startup.
+// Comptime check: tabs must not bind keys that are already bound
+// in the global keymap. Globals always win (the dispatcher reaches
+// `dispatchTabLocalKey` only when `keymap.matchAction` returns
+// null), so a tab-local binding for a globally-bound key is dead
+// code. Reject it loudly at compile time.
+//
+// This lives in `tui.zig` rather than `tab_framework.zig` to keep
+// the framework decoupled from the global keymap; here both are
+// already in scope.
+comptime {
+    @setEvalBranchQuota(20000);
+    for (std.meta.fields(@TypeOf(tab_modules))) |field| {
+        const Module = @field(tab_modules, field.name);
+        for (Module.tab.default_bindings) |binding| {
+            for (keybinds.global_default_bindings) |global| {
+                if (binding.key.codepoint == global.key.codepoint and
+                    std.meta.eql(binding.key.mods, global.key.mods))
+                {
+                    @compileError("Tab `" ++ field.name ++ "` binds a key in `default_bindings` " ++
+                        "that is already bound in the global keymap (`keybinds.zig`). " ++
+                        "Tab-local bindings cannot override global keys; pick a different key " ++
+                        "or remove the global binding. Conflicting tab action: ." ++
+                        @tagName(binding.action) ++ "; conflicting global action: ." ++
+                        @tagName(global.action));
+                }
+            }
+        }
+    }
+}
 
 /// Per-symbol fetched data. Owned by `App` and accessed as
 /// `app.symbol_data.*`. Populated by whichever tab fetches first
@@ -1299,18 +1320,6 @@ pub const App = struct {
                 self.moveBy(-1);
                 return ctx.consumeAndRedraw();
             },
-            .expand_collapse => {
-                if (self.active_tab == .portfolio) {
-                    tab_modules.portfolio.tab.handleAction(&self.states.portfolio, self, tab_modules.portfolio.Action.expand_collapse);
-                    return ctx.consumeAndRedraw();
-                } else if (self.active_tab == .options) {
-                    tab_modules.options.tab.handleAction(&self.states.options, self, tab_modules.options.Action.expand_collapse);
-                    return ctx.consumeAndRedraw();
-                } else if (self.active_tab == .history) {
-                    tab_modules.history.tab.handleAction(&self.states.history, self, tab_modules.history.Action.expand_collapse);
-                    return ctx.consumeAndRedraw();
-                }
-            },
             .scroll_down => {
                 const half = @max(1, self.visible_height / 2);
                 self.scroll_offset += half;
diff --git a/src/tui/keybinds.zig b/src/tui/keybinds.zig
index ee0c8ec..565a2c9 100644
--- a/src/tui/keybinds.zig
+++ b/src/tui/keybinds.zig
@@ -23,7 +23,6 @@ pub const Action = enum {
     page_up,
     select_next,
     select_prev,
-    expand_collapse,
     symbol_input,
     help,
     reload_portfolio,
@@ -140,7 +139,6 @@ pub const global_default_bindings = [_]Binding{
     .{ .action = .select_next, .key = .{ .codepoint = vaxis.Key.down } },
     .{ .action = .select_prev, .key = .{ .codepoint = 'k' } },
     .{ .action = .select_prev, .key = .{ .codepoint = vaxis.Key.up } },
-    .{ .action = .expand_collapse, .key = .{ .codepoint = vaxis.Key.enter } },
     .{ .action = .symbol_input, .key = .{ .codepoint = '/' } },
     .{ .action = .help, .key = .{ .codepoint = '?' } },
     .{ .action = .reload_portfolio, .key = .{ .codepoint = 'R' } },