juliusmarminge · Nov 12, 2026
diff --git a/apps/server/src/environment/ServerEnvironment.ts b/apps/server/src/environment/ServerEnvironment.ts
@@ -272,6 +272,7 @@ export const make = Effect.gen(function* () {
       projectCloneTracking: true,
       projectOrganization: true,
       ignoredFileListing: true,
+      ignoredFileSearch: true,
       triage: true,
       oneTimeSchedules: true,
       freshContext: true,

diff --git a/apps/server/src/workspace/WorkspaceEntries.test.ts b/apps/server/src/workspace/WorkspaceEntries.test.ts
@@ -433,6 +433,22 @@ it.layer(layerTest, { excludeTestServices: true })("WorkspaceEntries", (it) => {
         });
       }),
     );
+
+    it.effect("finds ignored files that sort past the listing limit", () =>
+      Effect.gen(function* () {
+        const cwd = yield* makeTempDir({ git: true });
+        yield* writeTextFile(cwd, ".gitignore", "*.secret\n");
+        for (let index = 1; index <= 205; index += 1) {
+          yield* writeTextFile(cwd, `file-${String(index).padStart(3, "0")}.secret`, "s");
+        }
+
+        const workspaceEntries = yield* WorkspaceEntries.WorkspaceEntries;
+        expect(yield* workspaceEntries.listIgnoredFiles({ cwd, query: "FILE-205" })).toEqual({
+          files: [{ path: "file-205.secret", byteLength: 1 }],
+          truncated: false,
+        });
+      }),
+    );
   });
 
   describe("search", () => {

diff --git a/apps/server/src/workspace/WorkspaceEntries.ts b/apps/server/src/workspace/WorkspaceEntries.ts
@@ -576,9 +576,13 @@ export const make = Effect.gen(function* () {
       })
       .pipe(Effect.orElseSucceed(() => undefined));
     if (!result || result.exitCode !== 0) return { files: [], truncated: false };
+    // Filter before the cap so files sorting past it stay reachable by search.
+    const query = input.query?.toLowerCase() ?? "";
     const paths = result.stdout
       .split("\0")
-      .filter((entry) => entry.length > 0 && !entry.endsWith("/"))
+      .filter(
+        (entry) => entry.length > 0 && !entry.endsWith("/") && entry.toLowerCase().includes(query),
+      )
       .toSorted();
     const files = yield* Effect.promise(() =>
       Promise.all(

diff --git a/apps/web/src/components/AddProjectToMachineDialog.tsx b/apps/web/src/components/AddProjectToMachineDialog.tsx
@@ -26,6 +26,7 @@ import { useAddProjectTargets } from "../hooks/useAddProjectTargets";
 import { useNewThreadHandler } from "../hooks/useHandleNewThread";
 import { useLogicalProjectEnvironments } from "../hooks/useLogicalProjectEnvironments";
 import {
+  COPIED_FILES_MAX_COUNT,
   COPYABLE_FILE_MAX_BYTES,
   addProjectToMachine,
   isDefaultCopiedFile,
@@ -35,6 +36,7 @@ import { newProjectId } from "../lib/utils";
 import { readProject, subscribeProject, useProject } from "../state/entities";
 import { useEnvironments } from "../state/environments";
 import { projectEnvironment } from "../state/projects";
+import { useDebouncedValue } from "../state/queries";
 import { useEnvironmentQuery } from "../state/query";
 import { EnvironmentMachineIcon } from "./EnvironmentMachineIcon";
 import { Button } from "./ui/button";
@@ -121,22 +123,40 @@ function AddProjectToMachineDialog({ request }: { request: AddProjectToMachineRe
   const [pathOverride, setPathOverride] = useState<string | null>(null);
   const destinationPath = pathOverride ?? defaultPath;
 
-  const canListFiles = source?.serverConfig?.environment.capabilities.ignoredFileListing === true;
-  const ignoredFiles = useEnvironmentQuery(
+  const capabilities = source?.serverConfig?.environment.capabilities;
+  const canListFiles = capabilities?.ignoredFileListing === true;
+  const canSearchFiles = canListFiles && capabilities?.ignoredFileSearch === true;
+  const allIgnoredFiles = useEnvironmentQuery(
     project && canListFiles
       ? projectEnvironment.listIgnoredFiles({
           environmentId: project.environmentId,
           input: { cwd: project.workspaceRoot },
         })
       : null,
   );
+  const [fileQuery, setFileQuery] = useState("");
+  const sentFileQuery = useDebouncedValue(fileQuery.trim(), 150);
+  const searchedFiles = useEnvironmentQuery(
+    project && canSearchFiles && sentFileQuery.length > 0
+      ? projectEnvironment.listIgnoredFiles({
+          environmentId: project.environmentId,
+          input: { cwd: project.workspaceRoot, query: sentFileQuery },
+        })
+      : null,
+  );
+  const searching = canSearchFiles && sentFileQuery.length > 0;
+  const ignoredFiles = searching ? searchedFiles : allIgnoredFiles;
   const files = ignoredFiles.data?.files ?? [];
-  const [selected, setSelected] = useState<ReadonlySet<string> | null>(null);
-  const selectedFiles = selected ?? defaultSelection(files);
+  // Keyed by path with the file kept, so picks made under one search survive the next.
+  const [selected, setSelected] = useState<ReadonlyMap<string, ProjectIgnoredFile> | null>(null);
+  const selectedFiles = selected ?? defaultSelection(allIgnoredFiles.data?.files ?? []);
   const copyable = files.filter((file) => file.byteLength <= COPYABLE_FILE_MAX_BYTES);
-  const selectedBytes = files
-    .filter((file) => selectedFiles.has(file.path))
-    .reduce((total, file) => total + file.byteLength, 0);
+  const allCopyableSelected = copyable.every((file) => selectedFiles.has(file.path));
+  const atSelectionLimit = selectedFiles.size >= COPIED_FILES_MAX_COUNT;
+  const selectedBytes = [...selectedFiles.values()].reduce(
+    (total, file) => total + file.byteLength,
+    0,
+  );
 
   const [submitting, setSubmitting] = useState(false);
   const [error, setError] = useState<string | null>(null);
@@ -146,11 +166,20 @@ function AddProjectToMachineDialog({ request }: { request: AddProjectToMachineRe
   const unavailable =
     project === null ||
     target === null ||
-    (canListFiles && ignoredFiles.data === null && ignoredFiles.error === null);
-  const toggleFile = (path: string, checked: boolean) => {
-    const next = new Set(selectedFiles);
-    if (checked) next.add(path);
-    else next.delete(path);
+    (canListFiles && allIgnoredFiles.data === null && allIgnoredFiles.error === null);
+  const toggleFile = (file: ProjectIgnoredFile, checked: boolean) => {
+    const next = new Map(selectedFiles);
+    if (!checked) next.delete(file.path);
+    else if (!atSelectionLimit) next.set(file.path, file);
+    setSelected(next);
+  };
+
+  const toggleShownFiles = () => {
+    const next = new Map(selectedFiles);
+    for (const file of copyable) {
+      if (allCopyableSelected) next.delete(file.path);
+      else if (next.size < COPIED_FILES_MAX_COUNT) next.set(file.path, file);
+    }
     setSelected(next);
   };
 
@@ -198,7 +227,7 @@ function AddProjectToMachineDialog({ request }: { request: AddProjectToMachineRe
         title: project.title,
         remoteUrl,
         destinationPath: destinationPath.trim(),
-        files: files.filter((file) => selectedFiles.has(file.path)).map((file) => file.path),
+        files: [...selectedFiles.keys()],
       });
       close();
       openClonedProject(scopeProjectRef(target.environmentId, projectId));
@@ -331,36 +360,46 @@ function AddProjectToMachineDialog({ request }: { request: AddProjectToMachineRe
               <div className="flex flex-col gap-1.5">
                 <div className="flex items-center gap-2">
                   <Label className="flex-1">Copy ignored files</Label>
+                  {copyable.length > 0 || selectedFiles.size > 0 ? (
+                    <span className="text-muted-foreground text-xs">
+                      {allIgnoredFiles.data?.truncated
+                        ? `${selectedFiles.size} selected`
+                        : `${selectedFiles.size} of ${files.length}`}
+                      {selectedBytes > 0 ? ` · ${formatBytes(selectedBytes)}` : ""}
+                    </span>
+                  ) : null}
                   {copyable.length > 0 ? (
-                    <>
-                      <span className="text-muted-foreground text-xs">
-                        {selectedFiles.size} of {files.length}
-                        {selectedBytes > 0 ? ` · ${formatBytes(selectedBytes)}` : ""}
-                      </span>
-                      <Button
-                        type="button"
-                        variant="ghost"
-                        size="xs"
-                        onClick={() =>
-                          setSelected(
-                            selectedFiles.size === copyable.length
-                              ? new Set()
-                              : new Set(copyable.map((file) => file.path)),
-                          )
-                        }
-                      >
-                        {selectedFiles.size === copyable.length ? "None" : "All"}
-                      </Button>
-                    </>
+                    <Button type="button" variant="ghost" size="xs" onClick={toggleShownFiles}>
+                      {allCopyableSelected ? "None" : "All"}
+                    </Button>
                   ) : null}
                 </div>
+                {canSearchFiles && (allIgnoredFiles.data?.truncated || fileQuery.length > 0) ? (
+                  <Input
+                    size="sm"
+                    type="search"
+                    aria-label="Search ignored files"
+                    placeholder="Search ignored files"
+                    value={fileQuery}
+                    maxLength={256}
+                    onChange={(event) => setFileQuery(event.target.value)}
+                    // Enter would otherwise submit the clone.
+                    onKeyDown={(event) => {
+                      if (event.key === "Enter") event.preventDefault();
+                    }}
+                    spellCheck={false}
+                    autoComplete="off"
+                  />
+                ) : null}
                 {ignoredFiles.error ? (
                   <p className="text-destructive-foreground text-xs">{ignoredFiles.error}</p>
                 ) : files.length === 0 ? (
                   <p className="text-muted-foreground text-xs">
-                    {ignoredFiles.isSuccess
-                      ? "No ignored files to copy."
-                      : "Finding ignored files…"}
+                    {!ignoredFiles.isSuccess
+                      ? "Finding ignored files…"
+                      : searching
+                        ? "No ignored files match."
+                        : "No ignored files to copy."}
                   </p>
                 ) : (
                   <div className="max-h-52 overflow-y-auto rounded-md border">
@@ -369,14 +408,21 @@ function AddProjectToMachineDialog({ request }: { request: AddProjectToMachineRe
                         key={file.path}
                         file={file}
                         checked={selectedFiles.has(file.path)}
-                        onCheckedChange={(checked) => toggleFile(file.path, checked)}
+                        disabled={atSelectionLimit && !selectedFiles.has(file.path)}
+                        onCheckedChange={(checked) => toggleFile(file, checked)}
                       />
                     ))}
                   </div>
                 )}
                 {ignoredFiles.data?.truncated ? (
                   <p className="text-muted-foreground text-xs">
                     Showing the first {files.length} files.
+                    {canSearchFiles ? " Search to find the rest." : ""}
+                  </p>
+                ) : null}
+                {atSelectionLimit ? (
+                  <p className="text-muted-foreground text-xs">
+                    Up to {COPIED_FILES_MAX_COUNT} files can be copied.
                   </p>
                 ) : null}
                 <p className="text-muted-foreground text-xs">
@@ -415,29 +461,37 @@ function projectSubdirectory(repositoryRoot: string | undefined, workspaceRoot:
     : "";
 }
 
-function defaultSelection(files: readonly ProjectIgnoredFile[]): ReadonlySet<string> {
-  return new Set(
+function defaultSelection(
+  files: readonly ProjectIgnoredFile[],
+): ReadonlyMap<string, ProjectIgnoredFile> {
+  return new Map(
     files
       .filter(
         (file) => file.byteLength <= COPYABLE_FILE_MAX_BYTES && isDefaultCopiedFile(file.path),
       )
-      .map((file) => file.path),
+      .map((file) => [file.path, file]),
   );
 }
 
 function IgnoredFileRow({
   file,
   checked,
+  disabled,
   onCheckedChange,
 }: {
   file: ProjectIgnoredFile;
   checked: boolean;
+  disabled: boolean;
   onCheckedChange: (checked: boolean) => void;
 }) {
   const tooLarge = file.byteLength > COPYABLE_FILE_MAX_BYTES;
   return (
     <label className="flex cursor-pointer items-center gap-2 px-2.5 py-1.5 text-sm not-last:border-b has-disabled:cursor-not-allowed has-disabled:opacity-64">
-      <Checkbox checked={checked} disabled={tooLarge} onCheckedChange={onCheckedChange} />
+      <Checkbox
+        checked={checked}
+        disabled={tooLarge || disabled}
+        onCheckedChange={onCheckedChange}
+      />
       <span className="min-w-0 flex-1 truncate font-mono text-xs">{file.path}</span>
       <span className="shrink-0 text-muted-foreground text-xs tabular-nums">
         {tooLarge ? "Over 1 MB" : formatBytes(file.byteLength)}

diff --git a/apps/web/src/lib/addProjectToMachine.ts b/apps/web/src/lib/addProjectToMachine.ts
@@ -21,6 +21,9 @@ import { sourceControlEnvironment } from "../state/sourceControl";
 /** Matches the server's read cap: a larger file would arrive truncated. */
 export const COPYABLE_FILE_MAX_BYTES = 1024 * 1024;
 
+/** Matches the server's ignored-file listing limit, so search cannot raise how many get copied. */
+export const COPIED_FILES_MAX_COUNT = 200;
+
 const DEFAULT_COPIED_FILE_NAME = /^(?:\.env(?:\..+)?|\.envrc|\.dev\.vars)$/;
 
 /** Env files are the ignored files people almost always want on a new machine. */

diff --git a/packages/contracts/src/environment.ts b/packages/contracts/src/environment.ts
@@ -149,6 +149,8 @@ export const ExecutionEnvironmentCapabilities = Schema.Struct({
   projectOrganization: Schema.optionalKey(Schema.Boolean),
   /** Server answers projects.listIgnoredFiles. */
   ignoredFileListing: Schema.optionalKey(Schema.Boolean),
+  /** projects.listIgnoredFiles filters by `query` before its listing limit. */
+  ignoredFileSearch: Schema.optionalKey(Schema.Boolean),
   environmentIcon: Schema.optionalKey(Schema.Boolean),
   desktopAppUpdate: Schema.optionalKey(Schema.Boolean),
   /** The desktop app switches update tracks when a server update request names one. */

diff --git a/packages/contracts/src/project.ts b/packages/contracts/src/project.ts
@@ -307,6 +307,8 @@ export type ProjectListEntriesResult = typeof ProjectListEntriesResult.Type;
 // are left out, so the list stays small enough to pick from.
 export const ProjectListIgnoredFilesInput = Schema.Struct({
   cwd: TrimmedNonEmptyString,
+  /** Case-insensitive path substring; servers without `ignoredFileSearch` ignore it. */
+  query: Schema.optional(TrimmedString.check(Schema.isMaxLength(256))),
 });
 export type ProjectListIgnoredFilesInput = typeof ProjectListIgnoredFilesInput.Type;