fix: index only the user-selected file/dir from @ autocomplete (#1388)

Co-authored-by: Letta Code <noreply@letta.com>

src/cli/components/FileAutocomplete.tsx

@@ -1,4 +1,5 @@
 import { useEffect, useRef, useState } from "react";
+import { addEntriesToCache } from "../helpers/fileIndex";
 import { searchFiles } from "../helpers/fileSearch";
 import { useAutocompleteNavigation } from "../hooks/useAutocompleteNavigation";
 import { AutocompleteBox, AutocompleteItem } from "./Autocomplete";
@@ -66,7 +67,15 @@ export function FileAutocomplete({
   const { selectedIndex } = useAutocompleteNavigation({
     matches,
     maxVisible: 10,
-    onSelect: onSelect ? (item) => onSelect(item.path) : undefined,
+    onSelect: onSelect
+      ? (item) => {
+          // Index only the selected item, not all search results
+          if (item.type === "file" || item.type === "dir") {
+            addEntriesToCache([{ path: item.path, type: item.type }]);
+          }
+          onSelect(item.path);
+        }
+      : undefined,
     manageActiveState: false, // We manage active state manually due to async loading
   });
 

src/cli/helpers/fileSearch.ts

@@ -1,12 +1,7 @@
 import { readdirSync, statSync } from "node:fs";
 import { join, relative, resolve } from "node:path";
 import { debugLog } from "../../utils/debug";
-import {
-  addEntriesToCache,
-  ensureFileIndex,
-  type FileMatch,
-  searchFileIndex,
-} from "./fileIndex";
+import { ensureFileIndex, type FileMatch, searchFileIndex } from "./fileIndex";
 import { shouldHardExcludeEntry } from "./fileSearchConfig";
 
 export function debounce<T extends (...args: never[]) => unknown>(
@@ -171,8 +166,6 @@ export async function searchFiles(
     }
 
     if (!indexSearchSucceeded || results.length === 0) {
-      const diskResultsBefore = results.length;
-
       if (effectiveDeep) {
         // Deep search: recursively search subdirectories.
         // Use a shallower depth limit when searching outside the project directory
@@ -225,13 +218,6 @@ export async function searchFiles(
           } catch {}
         }
       }
-
-      // If the index was working but just didn't have these files (created
-      // externally), add the newly found entries so future searches hit the
-      // cache instead of falling back to disk again.
-      if (indexSearchSucceeded && results.length > diskResultsBefore) {
-        addEntriesToCache(results.slice(diskResultsBefore));
-      }
     }
 
     // Only sort when the disk scan ran — its results come in arbitrary readdir