feat: support multi-run for non-Git projects

Creates non-Git multi-runs in the same project directory
Shows concise footer info when worktree isolation is unavailable
Displays default model variants with a friendly label

packages/ui/src/components/multirun/BranchSelector.tsx

@@ -9,7 +9,7 @@ import {
   SelectTrigger,
   SelectValue,
 } from '@/components/ui/select';
-import { useGitStore, useGitBranches, useGitLoadingBranches } from '@/stores/useGitStore';
+import { useGitStore, useGitBranches, useGitLoadingBranches, useGitLoadingStatus, useIsGitRepo } from '@/stores/useGitStore';
 import { useRuntimeAPIs } from '@/hooks/useRuntimeAPIs';
 import { getRootBranch } from '@/lib/worktrees/worktreeStatus';
 import { useI18n } from '@/lib/i18n';
@@ -53,15 +53,26 @@ export interface BranchSelectorState {
 export function useBranchOptions(directory: string | null): BranchSelectorState {
   const { git } = useRuntimeAPIs();
   const branches = useGitBranches(directory);
-  const isLoading = useGitLoadingBranches(directory);
+  const isGitRepo = useIsGitRepo(directory);
+  const isLoadingStatus = useGitLoadingStatus(directory);
+  const isLoadingBranches = useGitLoadingBranches(directory);
   const fetchBranches = useGitStore((state) => state.fetchBranches);
+  const fetchStatus = useGitStore((state) => state.fetchStatus);
+
+  React.useEffect(() => {
+    if (!directory || !git || isGitRepo !== null || isLoadingStatus) return;
+    void fetchStatus(directory, git, { silent: true });
+  }, [directory, git, fetchStatus, isGitRepo, isLoadingStatus]);
 
   // Fetch branches if not cached
   React.useEffect(() => {
     if (!directory || !git) return;
+    if (isGitRepo !== true) return;
     if (branches?.all) return; // Already cached
     void fetchBranches(directory, git);
-  }, [directory, git, branches?.all, fetchBranches]);
+  }, [directory, git, isGitRepo, branches?.all, fetchBranches]);
+
+  const isLoading = isLoadingStatus || (isGitRepo === true && isLoadingBranches);
 
   // Compute local and remote branch lists (same as NewWorktreeDialog)
   const localBranches = React.useMemo(() => {
@@ -82,10 +93,10 @@ export function useBranchOptions(directory: string | null): BranchSelectorState
   // isGitRepository: true if we got branches, false if fetch returned empty, null if not yet loaded
   const isGitRepository = React.useMemo<boolean | null>(() => {
     if (!directory) return null;
+    if (isGitRepo !== null) return isGitRepo;
     if (isLoading) return null;
-    if (!branches) return null;
+    return branches?.all ? true : null;
-    return Boolean(branches.all);
+  }, [directory, isLoading, branches, isGitRepo]);
-  }, [directory, isLoading, branches]);
 
   return { localBranches, remoteBranches, isLoading, isGitRepository };
 }

packages/ui/src/components/multirun/ModelMultiSelect.tsx

@@ -560,7 +560,11 @@ export const ModelMultiSelect: React.FC<ModelMultiSelectProps> = ({
                             variantValue === DEFAULT_VARIANT_VALUE ? 'text-muted-foreground' : 'text-[color:var(--status-info)]'
                           )}
                         />
-                        <SelectValue placeholder={t('multirun.modelMultiSelect.variant.placeholder')} />
+                        <SelectValue placeholder={t('multirun.modelMultiSelect.variant.placeholder')}>
+                          {(value) => value === DEFAULT_VARIANT_VALUE
+                            ? t('multirun.modelMultiSelect.variant.default')
+                            : value}
+                        </SelectValue>
                       </SelectTrigger>
                       <SelectContent fitContent>
                         <SelectItem value={DEFAULT_VARIANT_VALUE} className="pr-2 [&>span:first-child]:hidden">

packages/ui/src/components/multirun/MultiRunLauncher.tsx

@@ -587,7 +587,12 @@ export const MultiRunLauncher: React.FC<MultiRunLauncherProps> = ({
   };
 
   const isValid = Boolean(
-    name.trim() && prompt.trim() && selectedModels.length >= 2 && worktreeBaseBranch && isGitRepository && !isLoadingWorktreeBaseBranches
+    name.trim() &&
+    prompt.trim() &&
+    selectedModels.length >= 2 &&
+    selectedProjectDirectory &&
+    !isLoadingWorktreeBaseBranches &&
+    (isGitRepository === false || (isGitRepository === true && worktreeBaseBranch))
   );
 
   const configuredSetupCount = setupCommands.filter(cmd => cmd.trim()).length;
@@ -929,6 +934,12 @@ export const MultiRunLauncher: React.FC<MultiRunLauncherProps> = ({
       {/* ── Fixed footer ── */}
       <div className="shrink-0 px-4 sm:px-6 py-3">
         <div className="mx-auto w-full max-w-2xl flex items-center justify-end gap-2">
+          {isGitRepository === false ? (
+            <div className="mr-auto flex min-w-0 items-center gap-1.5 typography-micro text-muted-foreground">
+              <Icon name="information" className="h-3.5 w-3.5 shrink-0" />
+              <span className="truncate">{t('multirun.launcher.project.gitRequired')}</span>
+            </div>
+          ) : null}
           <Button
             type="button"
             variant="ghost"

packages/ui/src/lib/i18n/messages/en.ts

@@ -145,6 +145,7 @@ export const dict = {
   'multirun.launcher.project.label': 'Project',
   'multirun.launcher.project.placeholder': 'Select project',
   'multirun.launcher.project.empty': 'Add a project first.',
+  'multirun.launcher.project.gitRequired': 'No worktree isolation: runs use the same directory.',
   'multirun.launcher.groupName.label': 'Group name',
   'multirun.launcher.groupName.info': 'Used for worktree directory and branch names',
   'multirun.launcher.groupName.placeholder': 'feature-auth, bugfix-login',

packages/ui/src/lib/i18n/messages/es.ts

@@ -146,6 +146,7 @@ export const dict: Record<I18nKey, string> = {
   "multirun.launcher.project.label": "Proyecto",
   "multirun.launcher.project.placeholder": "Seleccionar proyecto",
   "multirun.launcher.project.empty": "Añade un proyecto primero.",
+  "multirun.launcher.project.gitRequired": "Sin aislamiento worktree: las ejecuciones usan el mismo directorio.",
   "multirun.launcher.groupName.label": "Nombre del grupo",
   "multirun.launcher.groupName.info": "Usado para el directorio de worktree y nombres de rama",
   "multirun.launcher.groupName.placeholder": "feature-auth, bugfix-login",

packages/ui/src/lib/i18n/messages/ko.ts

@@ -146,6 +146,7 @@ export const dict: Record<I18nKey, string> = {
   'multirun.launcher.project.label': '프로젝트',
   'multirun.launcher.project.placeholder': '프로젝트 선택',
   'multirun.launcher.project.empty': '먼저 프로젝트를 추가하세요.',
+  'multirun.launcher.project.gitRequired': 'worktree 격리 없음: 실행은 같은 디렉터리를 사용합니다.',
   'multirun.launcher.groupName.label': '그룹 이름',
   'multirun.launcher.groupName.info': '워크트리 디렉터리와 브랜치 이름에 사용됩니다',
   'multirun.launcher.groupName.placeholder': 'feature-auth, bugfix-login',

packages/ui/src/lib/i18n/messages/pl.ts

@@ -221,6 +221,7 @@ export const dict: Record<I18nKey, string> = {
   'multirun.launcher.project.label': 'Projekt',
   'multirun.launcher.project.placeholder': 'Wybierz projekt',
   'multirun.launcher.project.empty': 'Najpierw dodaj projekt.',
+  'multirun.launcher.project.gitRequired': 'Bez izolacji worktree: uruchomienia używają tego samego katalogu.',
   'multirun.launcher.groupName.label': 'Nazwa grupy',
   'multirun.launcher.groupName.info': 'Używane dla katalogu drzewa pracy i nazw gałęzi',
   'multirun.launcher.groupName.placeholder': 'feature-auth, bugfix-login',

packages/ui/src/lib/i18n/messages/pt-BR.ts

@@ -146,6 +146,7 @@ export const dict: Record<I18nKey, string> = {
   "multirun.launcher.project.label": "Projeto",
   "multirun.launcher.project.placeholder": "Selecionar projeto",
   "multirun.launcher.project.empty": "Adicione um projeto primeiro.",
+  "multirun.launcher.project.gitRequired": "Sem isolamento por worktree: as execuções usam o mesmo diretório.",
   "multirun.launcher.groupName.label": "Nome do grupo",
   "multirun.launcher.groupName.info": "Usado para o diretório de worktree e nomes de branch",
   "multirun.launcher.groupName.placeholder": "feature-auth, bugfix-login",

packages/ui/src/lib/i18n/messages/uk.ts

@@ -146,6 +146,7 @@ export const dict: Record<I18nKey, string> = {
   "multirun.launcher.project.label": "Проєкт",
   "multirun.launcher.project.placeholder": "Вибрати проєкт",
   "multirun.launcher.project.empty": "Спочатку додайте проєкт.",
+  "multirun.launcher.project.gitRequired": "Без ізоляції worktree: запуски використовують ту саму директорію.",
   "multirun.launcher.groupName.label": "Назва групи",
   "multirun.launcher.groupName.info": "Використовується для імен каталогу та гілок worktree",
   "multirun.launcher.groupName.placeholder": "feature-auth, bugfix-login",

packages/ui/src/lib/i18n/messages/zh-CN.ts

@@ -146,6 +146,7 @@ export const dict: Record<I18nKey, string> = {
   'multirun.launcher.project.label': '项目',
   'multirun.launcher.project.placeholder': '选择项目',
   'multirun.launcher.project.empty': '请先添加项目。',
+  'multirun.launcher.project.gitRequired': '无 worktree 隔离：运行将使用同一目录。',
   'multirun.launcher.groupName.label': '组名',
   'multirun.launcher.groupName.info': '用于工作树目录和分支名称',
   'multirun.launcher.groupName.placeholder': 'feature-auth, bugfix-login',

packages/ui/src/stores/useMultiRunStore.ts

@@ -118,14 +118,10 @@ export const useMultiRunStore = create<MultiRunStore>()(
           const directory = project.path;
 
           const isGit = await checkIsGitRepository(directory);
-          if (!isGit) {
-            set({ error: 'Not in a git repository', isLoading: false });
-            return null;
-          }
 
           const groupSlug = toGitSafeSlug(groupName);
-          const rootBranch = await getRootBranch(directory);
+          const rootBranch = isGit ? await getRootBranch(directory) : undefined;
-          const rootTrackingRemote = await resolveRootTrackingRemote(directory);
+          const rootTrackingRemote = isGit ? await resolveRootTrackingRemote(directory) : null;
 
           const createdRuns: Array<{
             sessionId: string;
@@ -147,7 +143,7 @@ export const useMultiRunStore = create<MultiRunStore>()(
           // Track current index per model during iteration
           const modelIndexes = new Map<string, number>();
 
-          // 1) Create worktrees + sessions
+          // 1) Create isolated worktrees for Git projects, or same-directory sessions otherwise.
           for (const model of models) {
             const key = `${model.providerID}:${model.modelID}`;
             const count = modelCounts.get(key) || 1;
@@ -160,6 +156,27 @@ export const useMultiRunStore = create<MultiRunStore>()(
               ? generateWorktreeNameSeed(groupSlug, `${modelSlug}/${index}`)
               : generateWorktreeNameSeed(groupSlug, modelSlug);
             try {
+              // Session title format: groupSlug/provider/model (or groupSlug/provider/model/index for duplicates)
+              const sessionTitle = count > 1
+                ? `${groupSlug}/${model.providerID}/${model.modelID}/${index}`
+                : `${groupSlug}/${model.providerID}/${model.modelID}`;
+
+              if (!isGit) {
+                const session = await opencodeClient.withDirectory(
+                  directory,
+                  () => opencodeClient.createSession({ title: sessionTitle })
+                );
+
+                createdRuns.push({
+                  sessionId: session.id,
+                  worktreePath: directory,
+                  providerID: model.providerID,
+                  modelID: model.modelID,
+                  variant: model.variant,
+                });
+                continue;
+              }
+
               const worktreeMetadata = await createWorktreeWithDefaults(project, {
                 preferredName,
                 mode: 'new',
@@ -177,11 +194,6 @@ export const useMultiRunStore = create<MultiRunStore>()(
                 kind: 'standard' as const,
               };
 
-              // Session title format: groupSlug/provider/model (or groupSlug/provider/model/index for duplicates)
-              const sessionTitle = count > 1
-                ? `${groupSlug}/${model.providerID}/${model.modelID}/${index}`
-                : `${groupSlug}/${model.providerID}/${model.modelID}`;
-
               const session = await opencodeClient.withDirectory(
                 worktreeMetadata.path,
                 () => opencodeClient.createSession({ title: sessionTitle })