feat(core): experimental in-progress steering hints (2 of 2) (#19307)

packages/cli/src/ui/components/messages/HintMessage.tsx

@@ -0,0 +1,53 @@
+/**
+ * @license
+ * Copyright 2026 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import type React from 'react';
+import { Text, Box } from 'ink';
+import { theme } from '../../semantic-colors.js';
+import { SCREEN_READER_USER_PREFIX } from '../../textConstants.js';
+import { HalfLinePaddedBox } from '../shared/HalfLinePaddedBox.js';
+import { useConfig } from '../../contexts/ConfigContext.js';
+
+interface HintMessageProps {
+  text: string;
+}
+
+export const HintMessage: React.FC<HintMessageProps> = ({ text }) => {
+  const prefix = '💡 ';
+  const prefixWidth = prefix.length;
+  const config = useConfig();
+  const useBackgroundColor = config.getUseBackgroundColor();
+
+  return (
+    <HalfLinePaddedBox
+      backgroundBaseColor={theme.text.accent}
+      backgroundOpacity={0.1}
+      useBackgroundColor={useBackgroundColor}
+    >
+      <Box
+        flexDirection="row"
+        paddingY={0}
+        marginY={useBackgroundColor ? 0 : 1}
+        paddingX={useBackgroundColor ? 1 : 0}
+        alignSelf="flex-start"
+      >
+        <Box width={prefixWidth} flexShrink={0}>
+          <Text
+            color={theme.text.accent}
+            aria-label={SCREEN_READER_USER_PREFIX}
+          >
+            {prefix}
+          </Text>
+        </Box>
+        <Box flexGrow={1}>
+          <Text wrap="wrap" italic color={theme.text.accent}>
+            {`Steering Hint: ${text}`}
+          </Text>
+        </Box>
+      </Box>
+    </HalfLinePaddedBox>
+  );
+};