fix(web): preserve single tildes in sent user messages

apps/web/src/components/chat/MessagesTimeline.browser.test.tsx

@@ -828,6 +828,25 @@ describe("MessagesTimeline messages", () => {
     expect((globalThis as { __t3Xss?: number }).__t3Xss).toBeUndefined();
   });
 
+  it("keeps single tildes in user paths literal without changing double tildes or assistant text", async () => {
+    const source =
+      "Install the skill as ~/folder-a/skills/x, then follow the guide (~/folder-a/guide.md).";
+    await using screen = await renderTimeline([
+      message(source),
+      message("Drop ~~the old plan~~", {}, "message-2"),
+      message(source, { role: "assistant" }, "assistant-1"),
+    ]);
+    const [user, doubleTilde, assistant] = screen.container.querySelectorAll<HTMLElement>(
+      "[data-timeline-row-kind=message]",
+    );
+    expect(user?.textContent).toContain(source);
+    expect(user?.querySelector("del")).toBeNull();
+    expect(doubleTilde?.querySelector("del")?.textContent).toBe("the old plan");
+    expect(assistant?.querySelector("del")?.textContent).toBe(
+      "/folder-a/skills/x, then follow the guide (",
+    );
+  });
+
   it("renders sanitized raw HTML in assistant messages", async () => {
     await using screen = await renderTimeline([
       message(

apps/web/src/components/chat/TimelineUserMessageRow.tsx

@@ -1,6 +1,9 @@
 import { InlineAudioPreview } from "../files/InlineAudioPreview";
 import { filePreviewKind } from "@t3tools/shared/filePreview";
-import { remarkEnableOrderedListNumbers } from "@t3tools/shared/markdownPipeline";
+import {
+  CHAT_USER_MARKDOWN_REMARK_PLUGINS,
+  remarkEnableOrderedListNumbers,
+} from "@t3tools/shared/markdownPipeline";
 import { findRevealRef } from "./markdownFindContext";
 import {
   type EnvironmentId,
@@ -1200,7 +1203,10 @@ const CollapsibleUserMessageBody = memo(function CollapsibleUserMessageBody(prop
   );
 });
 
-const USER_MESSAGE_REMARK_PLUGINS = [remarkEnableOrderedListNumbers];
+const USER_MESSAGE_REMARK_PLUGINS = [
+  ...CHAT_USER_MARKDOWN_REMARK_PLUGINS,
+  remarkEnableOrderedListNumbers,
+];
 
 const UserMessageBody = memo(function UserMessageBody(props: {
   text: string;

packages/shared/src/markdownPipeline.ts

@@ -274,6 +274,12 @@ export const CHAT_MARKDOWN_REMARK_PLUGINS_WITH_BREAKS: PluggableList = [
   remarkNormalizeLinksAndTagInlineCode,
 ];
 
+// Users type paths like ~/a and (~/b, which GFM's single-tilde strikethrough hides as <del>.
+// Appended after the base list, this reconfigures its remark-gfm entry; ~~double~~ still strikes.
+export const CHAT_USER_MARKDOWN_REMARK_PLUGINS: PluggableList = [
+  [remarkGfm, { singleTilde: false }],
+];
+
 // Start tags an HTML parser closes an open `<p>` for.
 const CLOSES_PARAGRAPH = new Set(
   "address article aside blockquote center details dialog dir div dl fieldset figcaption figure footer form h1 h2 h3 h4 h5 h6 header hgroup hr li listing main menu nav ol p plaintext pre search section summary table ul xmp dd dt".split(

packages/shared/src/threadFindText.test.ts

@@ -21,6 +21,14 @@ it("excludes review attachments rendered as context chips", () => {
   ]);
 });
 
+it("indexes single tildes in user paths as typed", () => {
+  const text = "Install as ~/a/x, then read (~/a/guide.md).";
+  expect(searchableMessageSegments({ role: "user", text, streaming: false })?.join("")).toBe(text);
+  expect(
+    searchableMessageSegments({ role: "user", text: "Drop ~~old~~", streaming: false })?.join(""),
+  ).toBe("Drop old");
+});
+
 it("excludes structured context chips without joining text across them", () => {
   expect(
     searchableMessageSegments({

packages/shared/src/threadFindText.ts

@@ -37,6 +37,7 @@ import {
   CHAT_MARKDOWN_REHYPE_PLUGINS,
   CHAT_MARKDOWN_REMARK_PLUGINS,
   CHAT_MARKDOWN_REMARK_PLUGINS_WITH_BREAKS,
+  CHAT_USER_MARKDOWN_REMARK_PLUGINS,
 } from "./markdownPipeline.ts";
 
 // Inline wrappers (including Shiki token spans) must not split a search phrase.
@@ -94,6 +95,7 @@ const insightBreaksProcessor = assistantTextProcessor(true, true);
 const userProcessor = unified()
   .use(remarkParse)
   .use(CHAT_MARKDOWN_REMARK_PLUGINS_WITH_BREAKS)
+  .use(CHAT_USER_MARKDOWN_REMARK_PLUGINS)
   .use(remarkRehype, { allowDangerousHtml: true });
 
 interface TextTree {