Require explicit commenter context in openers

src/services/comment-targeted-opener.ts

@@ -3,7 +3,7 @@ export interface CommentTargetedOpenerValidation {
   reason?: string;
 }
 
-const COMMENT_GROUNDING = /\b(?:comment|said|wrote|mentioned|wanted|wanting|wish(?:ed)?|liked the idea|you(?:'d| would) love)\b/i;
+const COMMENT_GROUNDING = /\b(?:comment|you (?:said|wrote|mentioned)|i (?:saw|noticed) you|what you (?:said|wrote|mentioned))\b/i;
 
 const RECIPIENT_APPEARANCE_PATTERNS: ReadonlyArray<{ pattern: RegExp; reason: string }> = [
   {
@@ -35,7 +35,8 @@ const RECIPIENT_APPEARANCE_PATTERNS: ReadonlyArray<{ pattern: RegExp; reason: st
  */
 export function validateCommentTargetedOpener(message: string): CommentTargetedOpenerValidation {
   const trimmed = message.trim();
-  if (!COMMENT_GROUNDING.test(trimmed)) {
+  const firstSentence = trimmed.split(/[.!?\n]/, 1)[0] ?? '';
+  if (!COMMENT_GROUNDING.test(firstSentence)) {
     return { safe: false, reason: 'does not ground the opener in what the commenter expressed' };
   }
   for (const rule of RECIPIENT_APPEARANCE_PATTERNS) {