fix(tool-display): avoid recursive search summaries (#114933)

* fix(tool-display): avoid recursive search summaries

Fixes #113401.\n\nCo-authored-by: qingminlong <qing.minlong@xydigit.com>

* fix(tool-display): recognize neutral search summaries

* style(tool-display): format summary matcher

src/agents/tool-display-exec.ts

@@ -118,6 +118,9 @@ function summarizeKnownExec(words: string[]): string {
     const pattern = optionValue(words, ["-e", "--regexp"]) ?? positional[0];
     const target = positional.length > 1 ? positional.at(-1) : undefined;
     if (pattern) {
+      if (isUnsafeSearchSummaryPattern(pattern)) {
+        return target ? `search text in ${target}` : "search text";
+      }
       return target ? `search "${pattern}" in ${target}` : `search "${pattern}"`;
     }
     return "search text";
@@ -290,6 +293,27 @@ function summarizeKnownExec(words: string[]): string {
   return /^[A-Za-z0-9._/-]+$/.test(arg) ? `run ${bin} ${arg}` : `run ${bin}`;
 }
 
+function isUnsafeSearchSummaryPattern(pattern: string): boolean {
+  const trimmed = pattern.trim();
+  return (
+    !trimmed ||
+    pattern.length > 120 ||
+    /[\r\n`]/u.test(pattern) ||
+    /^Bash failed:/iu.test(trimmed) ||
+    containsGeneratedSearchSummary(trimmed)
+  );
+}
+
+// Match the two labels this formatter emits, without hiding normal prose such as
+// "search engine" or "search textual data".
+const GENERATED_SEARCH_SUMMARY_FRAGMENT_RE = /^search\s+(?:["']|text(?:\s+in(?:\s|$)|$))/iu;
+
+function containsGeneratedSearchSummary(pattern: string): boolean {
+  return pattern
+    .split(/(?:\||->)/u)
+    .some((fragment) => GENERATED_SEARCH_SUMMARY_FRAGMENT_RE.test(fragment.trim()));
+}
+
 function summarizePipeline(stage: string): string {
   const pipeline = splitTopLevelPipes(stage);
   if (pipeline.length > 1) {

src/agents/tool-display.test.ts

@@ -224,6 +224,56 @@ describe("tool display details", () => {
     expect(detail).toBe("print lines 1-80 from extensions/discord/src/draft-stream.ts");
   });
 
+  it("keeps normal search patterns concise", () => {
+    for (const [command, expected] of [
+      ['rg "foo|bar" src/agents', 'search "foo|bar" in src/agents'],
+      ["rg 'search engine' src/agents", 'search "search engine" in src/agents'],
+      ["rg 'search textual data' src/agents", 'search "search textual data" in src/agents'],
+      ["rg 'research text in docs' src/agents", 'search "research text in docs" in src/agents'],
+    ]) {
+      expect(
+        formatToolDetail(
+          resolveToolDisplay({ name: "exec", args: { command }, detailMode: "explain" }),
+        ),
+      ).toBe(expected);
+    }
+  });
+
+  it("uses a neutral label for recursive or malformed search patterns", () => {
+    for (const command of [
+      `rg 'search "foo" in src/agents' src`,
+      `rg 'Bash failed: search "foo" in src|search "bar"' src`,
+      `rg 'run printf -> search "foo" in src' src`,
+      "rg 'search text' src",
+      "rg 'search text in src/agents' src",
+      "rg 'foo|search text in src/agents' src",
+      "rg 'run printf -> search text' src",
+      "rg 'line1\nline2' src",
+      "rg 'line with trailing newline\n' src",
+      "rg '`generated command`' src",
+      `rg '${"x".repeat(121)}' src`,
+      `rg '${" ".repeat(121)}x' src`,
+    ]) {
+      expect(
+        formatToolDetail(
+          resolveToolDisplay({ name: "exec", args: { command }, detailMode: "explain" }),
+        ),
+      ).toBe("search text in src");
+    }
+  });
+
+  it("sanitizes recursive search patterns inside pipelines", () => {
+    expect(
+      formatToolDetail(
+        resolveToolDisplay({
+          name: "exec",
+          args: { command: `printf x | rg 'search "foo" in src' .` },
+          detailMode: "explain",
+        }),
+      ),
+    ).toBe("print text -> search text in .");
+  });
+
   it("moves cd path to context suffix and appends raw command", () => {
     const detail = formatToolDetail(
       resolveToolDisplay({