diff --git a/packages/app/e2e/projects/projects-switch.spec.ts b/packages/app/e2e/projects/projects-switch.spec.ts
index e9cbf868d..1416aec72 100644
--- a/packages/app/e2e/projects/projects-switch.spec.ts
+++ b/packages/app/e2e/projects/projects-switch.spec.ts
@@ -1,15 +1,7 @@
 import { base64Decode } from "@opencode-ai/util/encode"
 import type { Page } from "@playwright/test"
 import { test, expect } from "../fixtures"
-import {
-  defocus,
-  createTestProject,
-  cleanupTestProject,
-  openSidebar,
-  sessionIDFromUrl,
-  waitDir,
-  waitSlug,
-} from "../actions"
+import { defocus, createTestProject, cleanupTestProject, openSidebar, sessionIDFromUrl, waitDir, waitSlug } from "../actions"
 import { projectSwitchSelector, promptSelector, workspaceItemSelector, workspaceNewSessionSelector } from "../selectors"
 import { dirSlug, resolveDirectory } from "../utils"
 
diff --git a/packages/app/src/context/global-sync/bootstrap.ts b/packages/app/src/context/global-sync/bootstrap.ts
index c71e00f6f..13494b7ad 100644
--- a/packages/app/src/context/global-sync/bootstrap.ts
+++ b/packages/app/src/context/global-sync/bootstrap.ts
@@ -158,7 +158,7 @@ export async function bootstrapDirectory(input: {
     input.sdk.vcs.get().then((x) => {
       const next = x.data ?? input.store.vcs
       input.setStore("vcs", next)
-      if (next) input.vcsCache.setStore("value", next)
+      if (next?.branch) input.vcsCache.setStore("value", next)
     }),
     input.sdk.permission.list().then((x) => {
       const grouped = groupBySession(
diff --git a/packages/app/src/context/global-sync/event-reducer.ts b/packages/app/src/context/global-sync/event-reducer.ts
index 0e243e95a..b8eda0573 100644
--- a/packages/app/src/context/global-sync/event-reducer.ts
+++ b/packages/app/src/context/global-sync/event-reducer.ts
@@ -268,9 +268,9 @@ export function applyDirectoryEvent(input: {
       break
     }
     case "vcs.branch.updated": {
-      const props = event.properties as { branch?: string }
+      const props = event.properties as { branch: string }
       if (input.store.vcs?.branch === props.branch) break
-      const next = { ...input.store.vcs, branch: props.branch }
+      const next = { branch: props.branch }
       input.setStore("vcs", next)
       if (input.vcsCache) input.vcsCache.setStore("value", next)
       break
diff --git a/packages/app/src/i18n/en.ts b/packages/app/src/i18n/en.ts
index c7e0c95ea..72caed40a 100644
--- a/packages/app/src/i18n/en.ts
+++ b/packages/app/src/i18n/en.ts
@@ -533,8 +533,6 @@ export const dict = {
   "session.review.noVcs.createGit.action": "Create Git repository",
   "session.review.noSnapshot": "Snapshot tracking is disabled in config, so session changes are unavailable",
   "session.review.noChanges": "No changes",
-  "session.review.noUncommittedChanges": "No uncommitted changes yet",
-  "session.review.noBranchChanges": "No branch changes yet",
 
   "session.files.selectToOpen": "Select a file to open",
   "session.files.all": "All files",
diff --git a/packages/app/src/pages/layout.tsx b/packages/app/src/pages/layout.tsx
index 52ac7c5f3..cca14fd50 100644
--- a/packages/app/src/pages/layout.tsx
+++ b/packages/app/src/pages/layout.tsx
@@ -633,8 +633,7 @@ export default function Layout(props: ParentProps) {
       if (!expanded) continue
       const key = workspaceKey(directory)
       const project = projects.find(
-        (item) =>
-          workspaceKey(item.worktree) === key || item.sandboxes?.some((sandbox) => workspaceKey(sandbox) === key),
+        (item) => workspaceKey(item.worktree) === key || item.sandboxes?.some((sandbox) => workspaceKey(sandbox) === key),
       )
       if (!project) continue
       if (project.vcs === "git" && layout.sidebar.workspaces(project.worktree)()) continue
@@ -1164,8 +1163,7 @@ export default function Layout(props: ParentProps) {
     const project = layout.projects
       .list()
       .find(
-        (item) =>
-          workspaceKey(item.worktree) === key || item.sandboxes?.some((sandbox) => workspaceKey(sandbox) === key),
+        (item) => workspaceKey(item.worktree) === key || item.sandboxes?.some((sandbox) => workspaceKey(sandbox) === key),
       )
     if (project) return project.worktree
 
diff --git a/packages/app/src/pages/layout/helpers.ts b/packages/app/src/pages/layout/helpers.ts
index 209cff8a7..886ffd26a 100644
--- a/packages/app/src/pages/layout/helpers.ts
+++ b/packages/app/src/pages/layout/helpers.ts
@@ -31,13 +31,11 @@ function sortSessions(now: number) {
 const isRootVisibleSession = (session: Session, directory: string) =>
   workspaceKey(session.directory) === workspaceKey(directory) && !session.parentID && !session.time?.archived
 
-const roots = (store: SessionStore) =>
-  (store.session ?? []).filter((session) => isRootVisibleSession(session, store.path.directory))
+const roots = (store: SessionStore) => (store.session ?? []).filter((session) => isRootVisibleSession(session, store.path.directory))
 
 export const sortedRootSessions = (store: SessionStore, now: number) => roots(store).sort(sortSessions(now))
 
-export const latestRootSession = (stores: SessionStore[], now: number) =>
-  stores.flatMap(roots).sort(sortSessions(now))[0]
+export const latestRootSession = (stores: SessionStore[], now: number) => stores.flatMap(roots).sort(sortSessions(now))[0]
 
 export function hasProjectPermissions<T>(
   request: Record<string, T[] | undefined>,
diff --git a/packages/app/src/pages/session.tsx b/packages/app/src/pages/session.tsx
index 970bc73b7..6d2917008 100644
--- a/packages/app/src/pages/session.tsx
+++ b/packages/app/src/pages/session.tsx
@@ -1,4 +1,4 @@
-import type { FileDiff, Project, UserMessage } from "@opencode-ai/sdk/v2"
+import type { Project, UserMessage } from "@opencode-ai/sdk/v2"
 import { useDialog } from "@opencode-ai/ui/context/dialog"
 import {
   batch,
@@ -57,9 +57,6 @@ import { formatServerError } from "@/utils/server-errors"
 const emptyUserMessages: UserMessage[] = []
 const emptyFollowups: (FollowupDraft & { id: string })[] = []
 
-type ChangeMode = "git" | "branch" | "session" | "turn"
-type VcsMode = "git" | "branch"
-
 type SessionHistoryWindowInput = {
   sessionID: () => string | undefined
   messagesReady: () => boolean
@@ -418,16 +415,15 @@ export default function Page() {
 
   const info = createMemo(() => (params.id ? sync.session.get(params.id) : undefined))
   const diffs = createMemo(() => (params.id ? (sync.data.session_diff[params.id] ?? []) : []))
-  const sessionCount = createMemo(() => Math.max(info()?.summary?.files ?? 0, diffs().length))
-  const hasSessionReview = createMemo(() => sessionCount() > 0)
-  const canReview = createMemo(() => !!params.dir)
+  const reviewCount = createMemo(() => Math.max(info()?.summary?.files ?? 0, diffs().length))
+  const hasReview = createMemo(() => reviewCount() > 0)
   const reviewTab = createMemo(() => isDesktop())
   const tabState = createSessionTabs({
     tabs,
     pathFromTab: file.pathFromTab,
     normalizeTab,
     review: reviewTab,
-    hasReview: canReview,
+    hasReview,
   })
   const contextOpen = tabState.contextOpen
   const openedTabs = tabState.openedTabs
@@ -503,22 +499,11 @@ export default function Page() {
   const [store, setStore] = createStore({
     messageId: undefined as string | undefined,
     mobileTab: "session" as "session" | "changes",
-    changes: "git" as ChangeMode,
+    changes: "session" as "session" | "turn",
     newSessionWorktree: "main",
     deferRender: false,
   })
 
-  const [vcs, setVcs] = createStore({
-    diff: {
-      git: [] as FileDiff[],
-      branch: [] as FileDiff[],
-    },
-    ready: {
-      git: false,
-      branch: false,
-    },
-  })
-
   const [followup, setFollowup] = createStore({
     items: {} as Record<string, (FollowupDraft & { id: string })[] | undefined>,
     sending: {} as Record<string, string | undefined>,
@@ -546,40 +531,6 @@ export default function Page() {
   let refreshTimer: number | undefined
   let diffFrame: number | undefined
   let diffTimer: number | undefined
-  const vcsTask = new Map<VcsMode, Promise<void>>()
-
-  const resetVcs = () => {
-    vcsTask.clear()
-    setVcs({
-      diff: { git: [], branch: [] },
-      ready: { git: false, branch: false },
-    })
-  }
-
-  const loadVcs = (mode: VcsMode, force = false) => {
-    if (sync.project?.vcs !== "git") return Promise.resolve()
-    if (vcs.ready[mode] && !force) return Promise.resolve()
-    const current = vcsTask.get(mode)
-    if (current) return current
-
-    const task = sdk.client.vcs
-      .diff({ mode })
-      .then((result) => {
-        setVcs("diff", mode, result.data ?? [])
-        setVcs("ready", mode, true)
-      })
-      .catch((error) => {
-        console.debug("[session-review] failed to load vcs diff", { mode, error })
-        setVcs("diff", mode, [])
-        setVcs("ready", mode, true)
-      })
-      .finally(() => {
-        vcsTask.delete(mode)
-      })
-
-    vcsTask.set(mode, task)
-    return task
-  }
 
   createComputed((prev) => {
     const open = desktopReviewOpen()
@@ -595,43 +546,7 @@ export default function Page() {
   }, desktopReviewOpen())
 
   const turnDiffs = createMemo(() => lastUserMessage()?.summary?.diffs ?? [])
-  const changesOptions = createMemo<ChangeMode[]>(() => {
-    const list: ChangeMode[] = []
-    const git = sync.project?.vcs === "git"
-    if (git) list.push("git")
-    if (
-      git &&
-      sync.data.vcs?.branch &&
-      sync.data.vcs?.default_branch &&
-      sync.data.vcs.branch !== sync.data.vcs.default_branch
-    ) {
-      list.push("branch")
-    }
-    list.push("session", "turn")
-    return list
-  })
-  const vcsMode = createMemo<VcsMode | undefined>(() => {
-    if (store.changes === "git" || store.changes === "branch") return store.changes
-  })
-  const reviewDiffs = createMemo(() => {
-    if (store.changes === "git") return vcs.diff.git
-    if (store.changes === "branch") return vcs.diff.branch
-    if (store.changes === "session") return diffs()
-    return turnDiffs()
-  })
-  const reviewCount = createMemo(() => {
-    if (store.changes === "git") return vcs.diff.git.length
-    if (store.changes === "branch") return vcs.diff.branch.length
-    if (store.changes === "session") return sessionCount()
-    return turnDiffs().length
-  })
-  const hasReview = createMemo(() => reviewCount() > 0)
-  const reviewReady = createMemo(() => {
-    if (store.changes === "git") return vcs.ready.git
-    if (store.changes === "branch") return vcs.ready.branch
-    if (store.changes === "session") return !hasSessionReview() || diffsReady()
-    return true
-  })
+  const reviewDiffs = createMemo(() => (store.changes === "session" ? diffs() : turnDiffs()))
 
   const newSessionWorktree = createMemo(() => {
     if (store.newSessionWorktree === "create") return "create"
@@ -700,10 +615,10 @@ export default function Page() {
   const diffsReady = createMemo(() => {
     const id = params.id
     if (!id) return true
-    if (!hasSessionReview()) return true
+    if (!hasReview()) return true
     return sync.data.session_diff[id] !== undefined
   })
-  const sessionEmptyKey = createMemo(() => {
+  const reviewEmptyKey = createMemo(() => {
     const project = sync.project
     if (project && !project.vcs) return "session.review.noVcs"
     if (sync.data.config.snapshot === false) return "session.review.noSnapshot"
@@ -826,23 +741,13 @@ export default function Page() {
       sessionKey,
       () => {
         setStore("messageId", undefined)
-        setStore("changes", "git")
+        setStore("changes", "session")
         setUi("pendingMessage", undefined)
       },
       { defer: true },
     ),
   )
 
-  createEffect(
-    on(
-      () => sdk.directory,
-      () => {
-        resetVcs()
-      },
-      { defer: true },
-    ),
-  )
-
   createEffect(
     on(
       () => params.dir,
@@ -965,40 +870,6 @@ export default function Page() {
   }
 
   const mobileChanges = createMemo(() => !isDesktop() && store.mobileTab === "changes")
-  const wantsReview = createMemo(() =>
-    isDesktop()
-      ? desktopFileTreeOpen() || (desktopReviewOpen() && activeTab() === "review")
-      : store.mobileTab === "changes",
-  )
-
-  createEffect(() => {
-    const list = changesOptions()
-    if (list.includes(store.changes)) return
-    const next = list[0]
-    if (!next) return
-    setStore("changes", next)
-  })
-
-  createEffect(() => {
-    const mode = vcsMode()
-    if (!mode) return
-    if (!wantsReview()) return
-    void loadVcs(mode)
-  })
-
-  createEffect(
-    on(
-      () => sync.data.session_status[params.id ?? ""]?.type,
-      (next, prev) => {
-        const mode = vcsMode()
-        if (!mode) return
-        if (!wantsReview()) return
-        if (next !== "idle" || prev === undefined || prev === "idle") return
-        void loadVcs(mode, true)
-      },
-      { defer: true },
-    ),
-  )
 
   const fileTreeTab = () => layout.fileTree.tab()
   const setFileTreeTab = (value: "changes" | "all") => layout.fileTree.setTab(value)
@@ -1045,23 +916,21 @@ export default function Page() {
     loadFile: file.load,
   })
 
-  const changesTitle = () => {
-    if (!canReview()) {
-      return null
-    }
+  const changesOptions = ["session", "turn"] as const
+  const changesOptionsList = [...changesOptions]
 
-    const label = (option: ChangeMode) => {
-      if (option === "git") return language.t("ui.sessionReview.title.git")
-      if (option === "branch") return language.t("ui.sessionReview.title.branch")
-      if (option === "session") return language.t("ui.sessionReview.title")
-      return language.t("ui.sessionReview.title.lastTurn")
+  const changesTitle = () => {
+    if (!hasReview()) {
+      return null
     }
 
     return (
       <Select
-        options={changesOptions()}
+        options={changesOptionsList}
         current={store.changes}
-        label={label}
+        label={(option) =>
+          option === "session" ? language.t("ui.sessionReview.title") : language.t("ui.sessionReview.title.lastTurn")
+        }
         onSelect={(option) => option && setStore("changes", option)}
         variant="ghost"
         size="small"
@@ -1070,34 +939,20 @@ export default function Page() {
     )
   }
 
-  const empty = (text: string) => (
+  const emptyTurn = () => (
     <div class="h-full pb-64 -mt-4 flex flex-col items-center justify-center text-center gap-6">
-      <div class="text-14-regular text-text-weak max-w-56">{text}</div>
+      <div class="text-14-regular text-text-weak max-w-56">{language.t("session.review.noChanges")}</div>
     </div>
   )
 
-  const reviewEmptyText = createMemo(() => {
-    if (store.changes === "git") return language.t("session.review.noUncommittedChanges")
-    if (store.changes === "branch") return language.t("session.review.noBranchChanges")
-    if (store.changes === "turn") return language.t("session.review.noChanges")
-    return language.t(sessionEmptyKey())
-  })
-
   const reviewEmpty = (input: { loadingClass: string; emptyClass: string }) => {
-    if (store.changes === "git" || store.changes === "branch") {
-      if (!reviewReady()) return <div class={input.loadingClass}>{language.t("session.review.loadingChanges")}</div>
-      return empty(reviewEmptyText())
-    }
+    if (store.changes === "turn") return emptyTurn()
 
-    if (store.changes === "turn") {
-      return empty(reviewEmptyText())
-    }
-
-    if (hasSessionReview() && !diffsReady()) {
+    if (hasReview() && !diffsReady()) {
       return <div class={input.loadingClass}>{language.t("session.review.loadingChanges")}</div>
     }
 
-    if (sessionEmptyKey() === "session.review.noVcs") {
+    if (reviewEmptyKey() === "session.review.noVcs") {
       return (
         <div class={input.emptyClass}>
           <div class="flex flex-col gap-3">
@@ -1117,7 +972,7 @@ export default function Page() {
 
     return (
       <div class={input.emptyClass}>
-        <div class="text-14-regular text-text-weak max-w-56">{reviewEmptyText()}</div>
+        <div class="text-14-regular text-text-weak max-w-56">{language.t(reviewEmptyKey())}</div>
       </div>
     )
   }
@@ -1165,18 +1020,6 @@ export default function Page() {
     </div>
   )
 
-  const mobileReview = () =>
-    reviewContent({
-      diffStyle: "unified",
-      classes: {
-        root: "pb-8",
-        header: "px-4",
-        container: "px-4",
-      },
-      loadingClass: "px-4 py-4 text-text-weak",
-      emptyClass: "h-full pb-64 -mt-4 flex flex-col items-center justify-center text-center gap-6",
-    })
-
   createEffect(
     on(
       activeFileTab,
@@ -1233,7 +1076,7 @@ export default function Page() {
     const pending = tree.pendingDiff
     if (!pending) return
     if (!tree.reviewScroll) return
-    if (!reviewReady()) return
+    if (!diffsReady()) return
 
     const attempt = (count: number) => {
       if (tree.pendingDiff !== pending) return
@@ -1810,7 +1653,7 @@ export default function Page() {
     <div class="relative bg-background-base size-full overflow-hidden flex flex-col">
       <SessionHeader />
       <div class="flex-1 min-h-0 flex flex-col md:flex-row">
-        <Show when={!isDesktop() && canReview()}>
+        <Show when={!isDesktop() && !!params.id}>
           <Tabs value={store.mobileTab} class="h-auto">
             <Tabs.List>
               <Tabs.Trigger
@@ -1852,7 +1695,16 @@ export default function Page() {
                 <Show when={lastUserMessage()}>
                   <MessageTimeline
                     mobileChanges={mobileChanges()}
-                    mobileFallback={mobileReview()}
+                    mobileFallback={reviewContent({
+                      diffStyle: "unified",
+                      classes: {
+                        root: "pb-8",
+                        header: "px-4",
+                        container: "px-4",
+                      },
+                      loadingClass: "px-4 py-4 text-text-weak",
+                      emptyClass: "h-full pb-64 -mt-4 flex flex-col items-center justify-center text-center gap-6",
+                    })}
                     actions={actions}
                     scroll={ui.scroll}
                     onResumeScroll={resumeScroll}
@@ -1884,9 +1736,7 @@ export default function Page() {
                 </Show>
               </Match>
               <Match when={true}>
-                <Show when={mobileChanges()} fallback={<NewSessionView worktree={newSessionWorktree()} />}>
-                  <div class="relative h-full overflow-hidden">{mobileReview()}</div>
-                </Show>
+                <NewSessionView worktree={newSessionWorktree()} />
               </Match>
             </Switch>
           </div>
@@ -1958,12 +1808,6 @@ export default function Page() {
         </div>
 
         <SessionSidePanel
-          canReview={canReview}
-          diffs={reviewDiffs}
-          diffsReady={reviewReady}
-          empty={reviewEmptyText}
-          hasReview={hasReview}
-          reviewCount={reviewCount}
           reviewPanel={reviewPanel}
           activeDiff={tree.activeDiff}
           focusReviewDiff={focusReviewDiff}
diff --git a/packages/app/src/pages/session/session-side-panel.tsx b/packages/app/src/pages/session/session-side-panel.tsx
index 3ba619736..3b8b0c96b 100644
--- a/packages/app/src/pages/session/session-side-panel.tsx
+++ b/packages/app/src/pages/session/session-side-panel.tsx
@@ -8,7 +8,6 @@ import { ResizeHandle } from "@opencode-ai/ui/resize-handle"
 import { Mark } from "@opencode-ai/ui/logo"
 import { DragDropProvider, DragDropSensors, DragOverlay, SortableProvider, closestCenter } from "@thisbeyond/solid-dnd"
 import type { DragEvent } from "@thisbeyond/solid-dnd"
-import type { FileDiff } from "@opencode-ai/sdk/v2"
 import { ConstrainDragYAxis, getDraggableId } from "@/utils/solid-dnd"
 import { useDialog } from "@opencode-ai/ui/context/dialog"
 
@@ -20,6 +19,7 @@ import { useCommand } from "@/context/command"
 import { useFile, type SelectedLineRange } from "@/context/file"
 import { useLanguage } from "@/context/language"
 import { useLayout } from "@/context/layout"
+import { useSync } from "@/context/sync"
 import { createFileTabListSync } from "@/pages/session/file-tab-scroll"
 import { FileTabContent } from "@/pages/session/file-tabs"
 import { createOpenSessionFileTab, createSessionTabs, getTabReorderIndex, type Sizing } from "@/pages/session/helpers"
@@ -27,12 +27,6 @@ import { setSessionHandoff } from "@/pages/session/handoff"
 import { useSessionLayout } from "@/pages/session/session-layout"
 
 export function SessionSidePanel(props: {
-  canReview: () => boolean
-  diffs: () => FileDiff[]
-  diffsReady: () => boolean
-  empty: () => string
-  hasReview: () => boolean
-  reviewCount: () => number
   reviewPanel: () => JSX.Element
   activeDiff?: string
   focusReviewDiff: (path: string) => void
@@ -40,11 +34,12 @@ export function SessionSidePanel(props: {
   size: Sizing
 }) {
   const layout = useLayout()
+  const sync = useSync()
   const file = useFile()
   const language = useLanguage()
   const command = useCommand()
   const dialog = useDialog()
-  const { sessionKey, tabs, view } = useSessionLayout()
+  const { params, sessionKey, tabs, view } = useSessionLayout()
 
   const isDesktop = createMediaQuery("(min-width: 768px)")
 
@@ -59,7 +54,24 @@ export function SessionSidePanel(props: {
   })
   const treeWidth = createMemo(() => (fileOpen() ? `${layout.fileTree.width()}px` : "0px"))
 
-  const diffFiles = createMemo(() => props.diffs().map((d) => d.file))
+  const info = createMemo(() => (params.id ? sync.session.get(params.id) : undefined))
+  const diffs = createMemo(() => (params.id ? (sync.data.session_diff[params.id] ?? []) : []))
+  const reviewCount = createMemo(() => Math.max(info()?.summary?.files ?? 0, diffs().length))
+  const hasReview = createMemo(() => reviewCount() > 0)
+  const diffsReady = createMemo(() => {
+    const id = params.id
+    if (!id) return true
+    if (!hasReview()) return true
+    return sync.data.session_diff[id] !== undefined
+  })
+
+  const reviewEmptyKey = createMemo(() => {
+    if (sync.project && !sync.project.vcs) return "session.review.noVcs"
+    if (sync.data.config.snapshot === false) return "session.review.noSnapshot"
+    return "session.review.noChanges"
+  })
+
+  const diffFiles = createMemo(() => diffs().map((d) => d.file))
   const kinds = createMemo(() => {
     const merge = (a: "add" | "del" | "mix" | undefined, b: "add" | "del" | "mix") => {
       if (!a) return b
@@ -70,7 +82,7 @@ export function SessionSidePanel(props: {
     const normalize = (p: string) => p.replaceAll("\\\\", "/").replace(/\/+$/, "")
 
     const out = new Map<string, "add" | "del" | "mix">()
-    for (const diff of props.diffs()) {
+    for (const diff of diffs()) {
       const file = normalize(diff.file)
       const kind = diff.status === "added" ? "add" : diff.status === "deleted" ? "del" : "mix"
 
@@ -124,7 +136,7 @@ export function SessionSidePanel(props: {
     pathFromTab: file.pathFromTab,
     normalizeTab,
     review: reviewTab,
-    hasReview: props.canReview,
+    hasReview,
   })
   const contextOpen = tabState.contextOpen
   const openedTabs = tabState.openedTabs
@@ -229,12 +241,12 @@ export function SessionSidePanel(props: {
                         onCleanup(stop)
                       }}
                     >
-                      <Show when={reviewTab() && props.canReview()}>
+                      <Show when={reviewTab()}>
                         <Tabs.Trigger value="review">
                           <div class="flex items-center gap-1.5">
                             <div>{language.t("session.tab.review")}</div>
-                            <Show when={props.hasReview()}>
-                              <div>{props.reviewCount()}</div>
+                            <Show when={hasReview()}>
+                              <div>{reviewCount()}</div>
                             </Show>
                           </div>
                         </Tabs.Trigger>
@@ -291,7 +303,7 @@ export function SessionSidePanel(props: {
                     </Tabs.List>
                   </div>
 
-                  <Show when={reviewTab() && props.canReview()}>
+                  <Show when={reviewTab()}>
                     <Tabs.Content value="review" class="flex flex-col h-full overflow-hidden contain-strict">
                       <Show when={activeTab() === "review"}>{props.reviewPanel()}</Show>
                     </Tabs.Content>
@@ -365,10 +377,8 @@ export function SessionSidePanel(props: {
               >
                 <Tabs.List>
                   <Tabs.Trigger value="changes" class="flex-1" classes={{ button: "w-full" }}>
-                    {props.reviewCount()}{" "}
-                    {language.t(
-                      props.reviewCount() === 1 ? "session.review.change.one" : "session.review.change.other",
-                    )}
+                    {reviewCount()}{" "}
+                    {language.t(reviewCount() === 1 ? "session.review.change.one" : "session.review.change.other")}
                   </Tabs.Trigger>
                   <Tabs.Trigger value="all" class="flex-1" classes={{ button: "w-full" }}>
                     {language.t("session.files.all")}
@@ -376,9 +386,9 @@ export function SessionSidePanel(props: {
                 </Tabs.List>
                 <Tabs.Content value="changes" class="bg-background-stronger px-3 py-0">
                   <Switch>
-                    <Match when={props.hasReview() || !props.diffsReady()}>
+                    <Match when={hasReview()}>
                       <Show
-                        when={props.diffsReady()}
+                        when={diffsReady()}
                         fallback={
                           <div class="px-2 py-2 text-12-regular text-text-weak">
                             {language.t("common.loading")}
@@ -397,7 +407,11 @@ export function SessionSidePanel(props: {
                         />
                       </Show>
                     </Match>
-                    <Match when={true}>{empty(props.empty())}</Match>
+                    <Match when={true}>
+                      {empty(
+                        language.t(sync.project && !sync.project.vcs ? "session.review.noChanges" : reviewEmptyKey()),
+                      )}
+                    </Match>
                   </Switch>
                 </Tabs.Content>
                 <Tabs.Content value="all" class="bg-background-stronger px-3 py-0">
diff --git a/packages/app/src/pages/session/use-session-commands.tsx b/packages/app/src/pages/session/use-session-commands.tsx
index f45374359..1a2e777f5 100644
--- a/packages/app/src/pages/session/use-session-commands.tsx
+++ b/packages/app/src/pages/session/use-session-commands.tsx
@@ -56,7 +56,11 @@ export const useSessionCommands = (actions: SessionCommandContext) => {
     if (!id) return
     return sync.session.get(id)
   }
-  const hasReview = () => !!params.id
+  const hasReview = () => {
+    const id = params.id
+    if (!id) return false
+    return Math.max(info()?.summary?.files ?? 0, (sync.data.session_diff[id] ?? []).length) > 0
+  }
   const normalizeTab = (tab: string) => {
     if (!tab.startsWith("file://")) return tab
     return file.tab(tab)
diff --git a/packages/opencode/src/cli/cmd/github.ts b/packages/opencode/src/cli/cmd/github.ts
index 1d8542133..edd9d7561 100644
--- a/packages/opencode/src/cli/cmd/github.ts
+++ b/packages/opencode/src/cli/cmd/github.ts
@@ -30,7 +30,7 @@ import { MessageV2 } from "../../session/message-v2"
 import { SessionPrompt } from "@/session/prompt"
 import { setTimeout as sleep } from "node:timers/promises"
 import { Process } from "@/util/process"
-import { Git } from "@/git"
+import { git } from "@/util/git"
 
 type GitHubAuthor = {
   login: string
@@ -257,7 +257,7 @@ export const GithubInstallCommand = cmd({
             }
 
             // Get repo info
-            const info = (await Git.run(["remote", "get-url", "origin"], { cwd: Instance.worktree })).text().trim()
+            const info = (await git(["remote", "get-url", "origin"], { cwd: Instance.worktree })).text().trim()
             const parsed = parseGitHubRemote(info)
             if (!parsed) {
               prompts.log.error(`Could not find git repository. Please run this command from a git repository.`)
@@ -496,20 +496,20 @@ export const GithubRunCommand = cmd({
           : "issue"
         : undefined
       const gitText = async (args: string[]) => {
-        const result = await Git.run(args, { cwd: Instance.worktree })
+        const result = await git(args, { cwd: Instance.worktree })
         if (result.exitCode !== 0) {
           throw new Process.RunFailedError(["git", ...args], result.exitCode, result.stdout, result.stderr)
         }
         return result.text().trim()
       }
       const gitRun = async (args: string[]) => {
-        const result = await Git.run(args, { cwd: Instance.worktree })
+        const result = await git(args, { cwd: Instance.worktree })
         if (result.exitCode !== 0) {
           throw new Process.RunFailedError(["git", ...args], result.exitCode, result.stdout, result.stderr)
         }
         return result
       }
-      const gitStatus = (args: string[]) => Git.run(args, { cwd: Instance.worktree })
+      const gitStatus = (args: string[]) => git(args, { cwd: Instance.worktree })
       const commitChanges = async (summary: string, actor?: string) => {
         const args = ["commit", "-m", summary]
         if (actor) args.push("-m", `Co-authored-by: ${actor} <${actor}@users.noreply.github.com>`)
diff --git a/packages/opencode/src/cli/cmd/pr.ts b/packages/opencode/src/cli/cmd/pr.ts
index a3a15afbc..8826fe343 100644
--- a/packages/opencode/src/cli/cmd/pr.ts
+++ b/packages/opencode/src/cli/cmd/pr.ts
@@ -2,7 +2,7 @@ import { UI } from "../ui"
 import { cmd } from "./cmd"
 import { Instance } from "@/project/instance"
 import { Process } from "@/util/process"
-import { Git } from "@/git"
+import { git } from "@/util/git"
 
 export const PrCommand = cmd({
   command: "pr <number>",
@@ -67,9 +67,9 @@ export const PrCommand = cmd({
               const remoteName = forkOwner
 
               // Check if remote already exists
-              const remotes = (await Git.run(["remote"], { cwd: Instance.worktree })).text().trim()
+              const remotes = (await git(["remote"], { cwd: Instance.worktree })).text().trim()
               if (!remotes.split("\n").includes(remoteName)) {
-                await Git.run(["remote", "add", remoteName, `https://github.com/${forkOwner}/${forkName}.git`], {
+                await git(["remote", "add", remoteName, `https://github.com/${forkOwner}/${forkName}.git`], {
                   cwd: Instance.worktree,
                 })
                 UI.println(`Added fork remote: ${remoteName}`)
@@ -77,7 +77,7 @@ export const PrCommand = cmd({
 
               // Set upstream to the fork so pushes go there
               const headRefName = prInfo.headRefName
-              await Git.run(["branch", `--set-upstream-to=${remoteName}/${headRefName}`, localBranchName], {
+              await git(["branch", `--set-upstream-to=${remoteName}/${headRefName}`, localBranchName], {
                 cwd: Instance.worktree,
               })
             }
diff --git a/packages/opencode/src/effect/instances.ts b/packages/opencode/src/effect/instances.ts
index 5ff1fc121..c05458d5d 100644
--- a/packages/opencode/src/effect/instances.ts
+++ b/packages/opencode/src/effect/instances.ts
@@ -40,7 +40,7 @@ function lookup(_key: string) {
     Layer.fresh(PermissionNext.layer),
     Layer.fresh(ProviderAuth.defaultLayer),
     Layer.fresh(FileWatcher.layer).pipe(Layer.orDie),
-    Layer.fresh(Vcs.defaultLayer),
+    Layer.fresh(Vcs.layer),
     Layer.fresh(FileTime.layer).pipe(Layer.orDie),
     Layer.fresh(Format.layer),
     Layer.fresh(File.layer),
diff --git a/packages/opencode/src/effect/runtime.ts b/packages/opencode/src/effect/runtime.ts
index 02209e7a0..f52203b22 100644
--- a/packages/opencode/src/effect/runtime.ts
+++ b/packages/opencode/src/effect/runtime.ts
@@ -1,7 +1,6 @@
 import { Effect, Layer, ManagedRuntime } from "effect"
 import { AccountEffect } from "@/account/effect"
 import { AuthEffect } from "@/auth/effect"
-import { GitEffect } from "@/git/effect"
 import { Instances } from "@/effect/instances"
 import type { InstanceServices } from "@/effect/instances"
 import { TruncateEffect } from "@/tool/truncate-effect"
@@ -10,7 +9,6 @@ import { Instance } from "@/project/instance"
 export const runtime = ManagedRuntime.make(
   Layer.mergeAll(
     AccountEffect.defaultLayer, //
-    GitEffect.defaultLayer,
     TruncateEffect.defaultLayer,
     Instances.layer,
   ).pipe(Layer.provideMerge(AuthEffect.layer)),
diff --git a/packages/opencode/src/file/index.ts b/packages/opencode/src/file/index.ts
index 79f8d9f7d..6e9b91727 100644
--- a/packages/opencode/src/file/index.ts
+++ b/packages/opencode/src/file/index.ts
@@ -1,7 +1,7 @@
 import { BusEvent } from "@/bus/bus-event"
 import { InstanceContext } from "@/effect/instance-context"
 import { runPromiseInstance } from "@/effect/runtime"
-import { Git } from "@/git"
+import { git } from "@/util/git"
 import { Effect, Fiber, Layer, Scope, ServiceMap } from "effect"
 import { formatPatch, structuredPatch } from "diff"
 import fs from "fs"
@@ -440,7 +440,7 @@ export namespace File {
 
         return yield* Effect.promise(async () => {
           const diffOutput = (
-            await Git.run(["-c", "core.fsmonitor=false", "-c", "core.quotepath=false", "diff", "--numstat", "HEAD"], {
+            await git(["-c", "core.fsmonitor=false", "-c", "core.quotepath=false", "diff", "--numstat", "HEAD"], {
               cwd: instance.directory,
             })
           ).text()
@@ -460,7 +460,7 @@ export namespace File {
           }
 
           const untrackedOutput = (
-            await Git.run(
+            await git(
               [
                 "-c",
                 "core.fsmonitor=false",
@@ -493,7 +493,7 @@ export namespace File {
           }
 
           const deletedOutput = (
-            await Git.run(
+            await git(
               [
                 "-c",
                 "core.fsmonitor=false",
@@ -584,17 +584,17 @@ export namespace File {
 
           if (instance.project.vcs === "git") {
             let diff = (
-              await Git.run(["-c", "core.fsmonitor=false", "diff", "--", file], { cwd: instance.directory })
+              await git(["-c", "core.fsmonitor=false", "diff", "--", file], { cwd: instance.directory })
             ).text()
             if (!diff.trim()) {
               diff = (
-                await Git.run(["-c", "core.fsmonitor=false", "diff", "--staged", "--", file], {
+                await git(["-c", "core.fsmonitor=false", "diff", "--staged", "--", file], {
                   cwd: instance.directory,
                 })
               ).text()
             }
             if (diff.trim()) {
-              const original = (await Git.run(["show", `HEAD:${file}`], { cwd: instance.directory })).text()
+              const original = (await git(["show", `HEAD:${file}`], { cwd: instance.directory })).text()
               const patch = structuredPatch(file, file, original, content, "old", "new", {
                 context: Infinity,
                 ignoreWhitespace: true,
diff --git a/packages/opencode/src/file/watcher.ts b/packages/opencode/src/file/watcher.ts
index a689e6385..16ab3c6d3 100644
--- a/packages/opencode/src/file/watcher.ts
+++ b/packages/opencode/src/file/watcher.ts
@@ -10,7 +10,7 @@ import { BusEvent } from "@/bus/bus-event"
 import { InstanceContext } from "@/effect/instance-context"
 import { Flag } from "@/flag/flag"
 import { Instance } from "@/project/instance"
-import { Git } from "@/git"
+import { git } from "@/util/git"
 import { lazy } from "@/util/lazy"
 import { Config } from "../config/config"
 import { FileIgnore } from "./ignore"
@@ -117,7 +117,7 @@ export namespace FileWatcher {
 
       if (instance.project.vcs === "git") {
         const result = yield* Effect.promise(() =>
-          Git.run(["rev-parse", "--git-dir"], {
+          git(["rev-parse", "--git-dir"], {
             cwd: instance.project.worktree,
           }),
         )
diff --git a/packages/opencode/src/git/effect.ts b/packages/opencode/src/git/effect.ts
deleted file mode 100644
index feff72b44..000000000
--- a/packages/opencode/src/git/effect.ts
+++ /dev/null
@@ -1,298 +0,0 @@
-import { NodeChildProcessSpawner, NodeFileSystem, NodePath } from "@effect/platform-node"
-import { Effect, Layer, ServiceMap, Stream } from "effect"
-import { ChildProcess, ChildProcessSpawner } from "effect/unstable/process"
-
-export namespace GitEffect {
-  const cfg = [
-    "--no-optional-locks",
-    "-c",
-    "core.autocrlf=false",
-    "-c",
-    "core.fsmonitor=false",
-    "-c",
-    "core.longpaths=true",
-    "-c",
-    "core.symlinks=true",
-    "-c",
-    "core.quotepath=false",
-  ] as const
-
-  function out(result: { text(): string }) {
-    return result.text().trim()
-  }
-
-  function split(text: string) {
-    return text.split("\0").filter(Boolean)
-  }
-
-  export type Kind = "added" | "deleted" | "modified"
-
-  export type Base = {
-    readonly name: string
-    readonly ref: string
-  }
-
-  export type Item = {
-    readonly file: string
-    readonly code: string
-    readonly status: Kind
-  }
-
-  export type Stat = {
-    readonly file: string
-    readonly additions: number
-    readonly deletions: number
-  }
-
-  export interface Result {
-    readonly exitCode: number
-    readonly text: () => string
-    readonly stdout: Buffer
-    readonly stderr: Buffer
-  }
-
-  export interface Options {
-    readonly cwd: string
-    readonly env?: Record<string, string>
-  }
-
-  export interface Interface {
-    readonly run: (args: string[], opts: Options) => Effect.Effect<Result>
-    readonly text: (args: string[], opts: Options) => Effect.Effect<string>
-    readonly lines: (args: string[], opts: Options) => Effect.Effect<string[]>
-    readonly branch: (cwd: string) => Effect.Effect<string | undefined>
-    readonly prefix: (cwd: string) => Effect.Effect<string>
-    readonly defaultBranch: (cwd: string) => Effect.Effect<Base | undefined>
-    readonly hasHead: (cwd: string) => Effect.Effect<boolean>
-    readonly mergeBase: (cwd: string, base: string, head?: string) => Effect.Effect<string | undefined>
-    readonly show: (cwd: string, ref: string, file: string, prefix?: string) => Effect.Effect<string>
-    readonly status: (cwd: string) => Effect.Effect<Item[]>
-    readonly diff: (cwd: string, ref: string) => Effect.Effect<Item[]>
-    readonly stats: (cwd: string, ref: string) => Effect.Effect<Stat[]>
-  }
-
-  function kind(code: string | undefined): Kind {
-    if (code === "??") return "added"
-    if (code?.includes("U")) return "modified"
-    if (code?.includes("A") && !code.includes("D")) return "added"
-    if (code?.includes("D") && !code.includes("A")) return "deleted"
-    return "modified"
-  }
-
-  function parseStatus(text: string) {
-    return split(text).flatMap((item) => {
-      const file = item.slice(3)
-      if (!file) return []
-      const code = item.slice(0, 2)
-      return [{ file, code, status: kind(code) } satisfies Item]
-    })
-  }
-
-  function parseNames(text: string) {
-    const list = split(text)
-    const out: Item[] = []
-    for (let i = 0; i < list.length; i += 2) {
-      const code = list[i]
-      const file = list[i + 1]
-      if (!code || !file) continue
-      out.push({ file, code, status: kind(code) })
-    }
-    return out
-  }
-
-  function parseStats(text: string) {
-    const out: Stat[] = []
-    for (const item of split(text)) {
-      const a = item.indexOf("\t")
-      const b = item.indexOf("\t", a + 1)
-      if (a === -1 || b === -1) continue
-      const file = item.slice(b + 1)
-      if (!file) continue
-      const adds = item.slice(0, a)
-      const dels = item.slice(a + 1, b)
-      const additions = adds === "-" ? 0 : Number.parseInt(adds || "0", 10)
-      const deletions = dels === "-" ? 0 : Number.parseInt(dels || "0", 10)
-      out.push({
-        file,
-        additions: Number.isFinite(additions) ? additions : 0,
-        deletions: Number.isFinite(deletions) ? deletions : 0,
-      })
-    }
-    return out
-  }
-
-  export class Service extends ServiceMap.Service<Service, Interface>()("@opencode/Git") {}
-
-  export const layer = Layer.effect(
-    Service,
-    Effect.gen(function* () {
-      const spawner = yield* ChildProcessSpawner.ChildProcessSpawner
-
-      const run = Effect.fn("Git.run")(
-        function* (args: string[], opts: Options) {
-          const proc = ChildProcess.make("git", [...cfg, ...args], {
-            cwd: opts.cwd,
-            env: opts.env,
-            extendEnv: true,
-          })
-          const handle = yield* spawner.spawn(proc)
-          const [stdout, stderr] = yield* Effect.all(
-            [Stream.mkString(Stream.decodeText(handle.stdout)), Stream.mkString(Stream.decodeText(handle.stderr))],
-            { concurrency: 2 },
-          )
-          return {
-            exitCode: yield* handle.exitCode,
-            text: () => stdout,
-            stdout: Buffer.from(stdout),
-            stderr: Buffer.from(stderr),
-          } satisfies Result
-        },
-        Effect.scoped,
-        Effect.catch((err) =>
-          Effect.succeed({
-            exitCode: ChildProcessSpawner.ExitCode(1),
-            text: () => "",
-            stdout: Buffer.alloc(0),
-            stderr: Buffer.from(String(err)),
-          }),
-        ),
-      )
-
-      const text = Effect.fn("Git.text")(function* (args: string[], opts: Options) {
-        return (yield* run(args, opts)).text()
-      })
-
-      const lines = Effect.fn("Git.lines")(function* (args: string[], opts: Options) {
-        return (yield* text(args, opts))
-          .split(/\r?\n/)
-          .map((item) => item.trim())
-          .filter(Boolean)
-      })
-
-      const refs = Effect.fnUntraced(function* (cwd: string) {
-        return yield* lines(["for-each-ref", "--format=%(refname:short)", "refs/heads"], { cwd })
-      })
-
-      const configured = Effect.fnUntraced(function* (cwd: string, list: string[]) {
-        const result = yield* run(["config", "init.defaultBranch"], { cwd })
-        if (result.exitCode !== 0) return
-        const name = out(result)
-        if (!name || !list.includes(name)) return
-        const ref = yield* run(["rev-parse", "--verify", name], { cwd })
-        if (ref.exitCode !== 0) return
-        return { name, ref: name } satisfies Base
-      })
-
-      const remoteHead = Effect.fnUntraced(function* (cwd: string, remote: string) {
-        const result = yield* run(["ls-remote", "--symref", remote, "HEAD"], { cwd })
-        if (result.exitCode !== 0) return
-        for (const line of result.text().split("\n")) {
-          const match = /^ref: refs\/heads\/(.+)\tHEAD$/.exec(line.trim())
-          if (!match?.[1]) continue
-          return { name: match[1], ref: `${remote}/${match[1]}` } satisfies Base
-        }
-      })
-
-      const primary = Effect.fnUntraced(function* (cwd: string) {
-        const list = yield* lines(["remote"], { cwd })
-        if (list.includes("origin")) return "origin"
-        if (list.length === 1) return list[0]
-        if (list.includes("upstream")) return "upstream"
-        return list[0]
-      })
-
-      const branch = Effect.fn("Git.branch")(function* (cwd: string) {
-        const result = yield* run(["rev-parse", "--abbrev-ref", "HEAD"], { cwd })
-        if (result.exitCode !== 0) return
-        const text = out(result)
-        return text || undefined
-      })
-
-      const prefix = Effect.fn("Git.prefix")(function* (cwd: string) {
-        const result = yield* run(["rev-parse", "--show-prefix"], { cwd })
-        if (result.exitCode !== 0) return ""
-        return out(result)
-      })
-
-      const defaultBranch = Effect.fn("Git.defaultBranch")(function* (cwd: string) {
-        const remote = yield* primary(cwd)
-        if (remote) {
-          const head = yield* run(["symbolic-ref", `refs/remotes/${remote}/HEAD`], { cwd })
-          if (head.exitCode === 0) {
-            const ref = out(head).replace(/^refs\/remotes\//, "")
-            const name = ref.startsWith(`${remote}/`) ? ref.slice(`${remote}/`.length) : ""
-            if (name) return { name, ref } satisfies Base
-          }
-
-          const next = yield* remoteHead(cwd, remote)
-          if (next) return next
-        }
-
-        const list = yield* refs(cwd)
-        const next = yield* configured(cwd, list)
-        if (next) return next
-        for (const name of ["main", "master"]) {
-          if (list.includes(name)) return { name, ref: name } satisfies Base
-        }
-      })
-
-      const hasHead = Effect.fn("Git.hasHead")(function* (cwd: string) {
-        const result = yield* run(["rev-parse", "--verify", "HEAD"], { cwd })
-        return result.exitCode === 0
-      })
-
-      const mergeBase = Effect.fn("Git.mergeBase")(function* (cwd: string, base: string, head = "HEAD") {
-        const result = yield* run(["merge-base", base, head], { cwd })
-        if (result.exitCode !== 0) return
-        const text = out(result)
-        return text || undefined
-      })
-
-      const show = Effect.fn("Git.show")(function* (cwd: string, ref: string, file: string, prefix = "") {
-        const target = prefix ? `${prefix}${file}` : file
-        const result = yield* run(["show", `${ref}:${target}`], { cwd })
-        if (result.exitCode !== 0) return ""
-        return result.text()
-      })
-
-      const status = Effect.fn("Git.status")(function* (cwd: string) {
-        return parseStatus(
-          yield* text(["status", "--porcelain=v1", "--untracked-files=all", "--no-renames", "-z", "--", "."], { cwd }),
-        )
-      })
-
-      const diff = Effect.fn("Git.diff")(function* (cwd: string, ref: string) {
-        return parseNames(
-          yield* text(["diff", "--no-ext-diff", "--no-renames", "--name-status", "-z", ref, "--", "."], { cwd }),
-        )
-      })
-
-      const stats = Effect.fn("Git.stats")(function* (cwd: string, ref: string) {
-        return parseStats(
-          yield* text(["diff", "--no-ext-diff", "--no-renames", "--numstat", "-z", ref, "--", "."], { cwd }),
-        )
-      })
-
-      return Service.of({
-        run,
-        text,
-        lines,
-        branch,
-        prefix,
-        defaultBranch,
-        hasHead,
-        mergeBase,
-        show,
-        status,
-        diff,
-        stats,
-      })
-    }),
-  )
-
-  const platformLayer = NodeChildProcessSpawner.layer.pipe(
-    Layer.provideMerge(Layer.mergeAll(NodeFileSystem.layer, NodePath.layer)),
-  )
-
-  export const defaultLayer = layer.pipe(Layer.provide(platformLayer))
-}
diff --git a/packages/opencode/src/git/index.ts b/packages/opencode/src/git/index.ts
deleted file mode 100644
index 1b04353b1..000000000
--- a/packages/opencode/src/git/index.ts
+++ /dev/null
@@ -1,64 +0,0 @@
-import { Effect } from "effect"
-import { runtime } from "@/effect/runtime"
-import { GitEffect } from "./effect"
-
-function runPromise<A>(f: (service: GitEffect.Interface) => Effect.Effect<A>): Promise<A> {
-  return runtime.runPromise(GitEffect.Service.use(f))
-}
-
-export namespace Git {
-  export type Kind = GitEffect.Kind
-  export type Base = GitEffect.Base
-  export type Item = GitEffect.Item
-  export type Stat = GitEffect.Stat
-  export type Result = GitEffect.Result
-  export type Options = GitEffect.Options
-
-  export function run(args: string[], opts: Options) {
-    return runPromise((git) => git.run(args, opts))
-  }
-
-  export function text(args: string[], opts: Options) {
-    return runPromise((git) => git.text(args, opts))
-  }
-
-  export function lines(args: string[], opts: Options) {
-    return runPromise((git) => git.lines(args, opts))
-  }
-
-  export function branch(cwd: string) {
-    return runPromise((git) => git.branch(cwd))
-  }
-
-  export function prefix(cwd: string) {
-    return runPromise((git) => git.prefix(cwd))
-  }
-
-  export function defaultBranch(cwd: string) {
-    return runPromise((git) => git.defaultBranch(cwd))
-  }
-
-  export function hasHead(cwd: string) {
-    return runPromise((git) => git.hasHead(cwd))
-  }
-
-  export function mergeBase(cwd: string, base: string, head?: string) {
-    return runPromise((git) => git.mergeBase(cwd, base, head))
-  }
-
-  export function show(cwd: string, ref: string, file: string, prefix?: string) {
-    return runPromise((git) => git.show(cwd, ref, file, prefix))
-  }
-
-  export function status(cwd: string) {
-    return runPromise((git) => git.status(cwd))
-  }
-
-  export function diff(cwd: string, ref: string) {
-    return runPromise((git) => git.diff(cwd, ref))
-  }
-
-  export function stats(cwd: string, ref: string) {
-    return runPromise((git) => git.stats(cwd, ref))
-  }
-}
diff --git a/packages/opencode/src/project/project.ts b/packages/opencode/src/project/project.ts
index f2df9982e..1cef41c85 100644
--- a/packages/opencode/src/project/project.ts
+++ b/packages/opencode/src/project/project.ts
@@ -11,7 +11,7 @@ import { BusEvent } from "@/bus/bus-event"
 import { iife } from "@/util/iife"
 import { GlobalBus } from "@/bus/global"
 import { existsSync } from "fs"
-import { Git } from "@/git"
+import { git } from "../util/git"
 import { Glob } from "../util/glob"
 import { which } from "../util/which"
 import { ProjectID } from "./schema"
@@ -119,7 +119,7 @@ export namespace Project {
           }
         }
 
-        const worktree = await Git.run(["rev-parse", "--git-common-dir"], {
+        const worktree = await git(["rev-parse", "--git-common-dir"], {
           cwd: sandbox,
         })
           .then(async (result) => {
@@ -147,7 +147,7 @@ export namespace Project {
 
         // generate id from root commit
         if (!id) {
-          const roots = await Git.run(["rev-list", "--max-parents=0", "HEAD"], {
+          const roots = await git(["rev-list", "--max-parents=0", "HEAD"], {
             cwd: sandbox,
           })
             .then(async (result) =>
@@ -184,7 +184,7 @@ export namespace Project {
           }
         }
 
-        const top = await Git.run(["rev-parse", "--show-toplevel"], {
+        const top = await git(["rev-parse", "--show-toplevel"], {
           cwd: sandbox,
         })
           .then(async (result) => gitpath(sandbox, await result.text()))
@@ -349,7 +349,7 @@ export namespace Project {
     if (input.project.vcs === "git") return input.project
     if (!which("git")) throw new Error("Git is not installed")
 
-    const result = await Git.run(["init", "--quiet"], {
+    const result = await git(["init", "--quiet"], {
       cwd: input.directory,
     })
     if (result.exitCode !== 0) {
diff --git a/packages/opencode/src/project/vcs.ts b/packages/opencode/src/project/vcs.ts
index 7358ec414..9e85571c4 100644
--- a/packages/opencode/src/project/vcs.ts
+++ b/packages/opencode/src/project/vcs.ts
@@ -1,122 +1,16 @@
-import { AppFileSystem } from "@/filesystem"
 import { Effect, Layer, ServiceMap } from "effect"
 import { Bus } from "@/bus"
 import { BusEvent } from "@/bus/bus-event"
 import { InstanceContext } from "@/effect/instance-context"
 import { FileWatcher } from "@/file/watcher"
-import { GitEffect } from "@/git/effect"
-import { Snapshot } from "@/snapshot"
 import { Log } from "@/util/log"
-import path from "path"
+import { git } from "@/util/git"
 import { Instance } from "./instance"
 import z from "zod"
 
-function count(text: string) {
-  if (!text) return 0
-  if (!text.endsWith("\n")) return text.split("\n").length
-  return text.slice(0, -1).split("\n").length
-}
-
-const work = Effect.fnUntraced(function* (fs: AppFileSystem.Interface, cwd: string, file: string) {
-  const full = path.join(cwd, file)
-  if (!(yield* fs.exists(full).pipe(Effect.orDie))) return ""
-  const buf = yield* fs.readFile(full).pipe(Effect.catch(() => Effect.succeed(new Uint8Array())))
-  if (Buffer.from(buf).includes(0)) return ""
-  return Buffer.from(buf).toString("utf8")
-})
-
-function stats(list: GitEffect.Stat[]) {
-  const out = new Map<string, { additions: number; deletions: number }>()
-  for (const item of list) {
-    out.set(item.file, {
-      additions: item.additions,
-      deletions: item.deletions,
-    })
-  }
-  return out
-}
-
-function merge(...lists: GitEffect.Item[][]) {
-  const out = new Map<string, GitEffect.Item>()
-  for (const list of lists) {
-    for (const item of list) {
-      if (!out.has(item.file)) out.set(item.file, item)
-    }
-  }
-  return [...out.values()]
-}
-
-const files = Effect.fnUntraced(function* (
-  fs: AppFileSystem.Interface,
-  git: GitEffect.Interface,
-  cwd: string,
-  ref: string | undefined,
-  list: GitEffect.Item[],
-  nums: Map<string, { additions: number; deletions: number }>,
-) {
-  const base = ref ? yield* git.prefix(cwd) : ""
-  const next = yield* Effect.forEach(
-    list,
-    (item) =>
-      Effect.gen(function* () {
-        const before = item.status === "added" || !ref ? "" : yield* git.show(cwd, ref, item.file, base)
-        const after = item.status === "deleted" ? "" : yield* work(fs, cwd, item.file)
-        const stat = nums.get(item.file)
-        return {
-          file: item.file,
-          before,
-          after,
-          additions: stat?.additions ?? (item.status === "added" ? count(after) : 0),
-          deletions: stat?.deletions ?? (item.status === "deleted" ? count(before) : 0),
-          status: item.status,
-        } satisfies Snapshot.FileDiff
-      }),
-    { concurrency: 8 },
-  )
-  return next.toSorted((a, b) => a.file.localeCompare(b.file))
-})
-
-const track = Effect.fnUntraced(function* (
-  fs: AppFileSystem.Interface,
-  git: GitEffect.Interface,
-  cwd: string,
-  ref: string | undefined,
-) {
-  if (!ref) {
-    return yield* files(fs, git, cwd, ref, yield* git.status(cwd), new Map())
-  }
-  const [list, nums] = yield* Effect.all([git.status(cwd), git.stats(cwd, ref)], { concurrency: 2 })
-  return yield* files(fs, git, cwd, ref, list, stats(nums))
-})
-
-const compare = Effect.fnUntraced(function* (
-  fs: AppFileSystem.Interface,
-  git: GitEffect.Interface,
-  cwd: string,
-  ref: string,
-) {
-  const [list, nums, extra] = yield* Effect.all([git.diff(cwd, ref), git.stats(cwd, ref), git.status(cwd)], {
-    concurrency: 3,
-  })
-  return yield* files(
-    fs,
-    git,
-    cwd,
-    ref,
-    merge(
-      list,
-      extra.filter((item) => item.code === "??"),
-    ),
-    stats(nums),
-  )
-})
-
 export namespace Vcs {
   const log = Log.create({ service: "vcs" })
 
-  export const Mode = z.enum(["git", "branch"])
-  export type Mode = z.infer<typeof Mode>
-
   export const Event = {
     BranchUpdated: BusEvent.define(
       "vcs.branch.updated",
@@ -128,8 +22,7 @@ export namespace Vcs {
 
   export const Info = z
     .object({
-      branch: z.string().optional(),
-      default_branch: z.string().optional(),
+      branch: z.string(),
     })
     .meta({
       ref: "VcsInfo",
@@ -138,8 +31,6 @@ export namespace Vcs {
 
   export interface Interface {
     readonly branch: () => Effect.Effect<string | undefined>
-    readonly defaultBranch: () => Effect.Effect<string | undefined>
-    readonly diff: (mode: Mode) => Effect.Effect<Snapshot.FileDiff[]>
   }
 
   export class Service extends ServiceMap.Service<Service, Interface>()("@opencode/Vcs") {}
@@ -148,18 +39,20 @@ export namespace Vcs {
     Service,
     Effect.gen(function* () {
       const instance = yield* InstanceContext
-      const fs = yield* AppFileSystem.Service
-      const git = yield* GitEffect.Service
-      let current: string | undefined
-      let root: GitEffect.Base | undefined
+      let currentBranch: string | undefined
 
       if (instance.project.vcs === "git") {
-        const get = () => Effect.runPromise(git.branch(instance.directory))
+        const getCurrentBranch = async () => {
+          const result = await git(["rev-parse", "--abbrev-ref", "HEAD"], {
+            cwd: instance.project.worktree,
+          })
+          if (result.exitCode !== 0) return undefined
+          const text = result.text().trim()
+          return text || undefined
+        }
 
-        ;[current, root] = yield* Effect.all([git.branch(instance.directory), git.defaultBranch(instance.directory)], {
-          concurrency: 2,
-        })
-        log.info("initialized", { branch: current, default_branch: root?.name })
+        currentBranch = yield* Effect.promise(() => getCurrentBranch())
+        log.info("initialized", { branch: currentBranch })
 
         yield* Effect.acquireRelease(
           Effect.sync(() =>
@@ -167,11 +60,12 @@ export namespace Vcs {
               FileWatcher.Event.Updated,
               Instance.bind(async (evt) => {
                 if (!evt.properties.file.endsWith("HEAD")) return
-                const next = await get()
-                if (next === current) return
-                log.info("branch changed", { from: current, to: next })
-                current = next
-                Bus.publish(Event.BranchUpdated, { branch: next })
+                const next = await getCurrentBranch()
+                if (next !== currentBranch) {
+                  log.info("branch changed", { from: currentBranch, to: next })
+                  currentBranch = next
+                  Bus.publish(Event.BranchUpdated, { branch: next })
+                }
               }),
             ),
           ),
@@ -181,30 +75,9 @@ export namespace Vcs {
 
       return Service.of({
         branch: Effect.fn("Vcs.branch")(function* () {
-          return current
-        }),
-        defaultBranch: Effect.fn("Vcs.defaultBranch")(function* () {
-          return root?.name
-        }),
-        diff: Effect.fn("Vcs.diff")(function* (mode: Mode) {
-          if (instance.project.vcs !== "git") return []
-          if (mode === "git") {
-            const ok = yield* git.hasHead(instance.directory)
-            return yield* track(fs, git, instance.directory, ok ? "HEAD" : undefined)
-          }
-
-          if (!root) return []
-          if (current && current === root.name) return []
-          const ref = yield* git.mergeBase(instance.directory, root.ref)
-          if (!ref) return []
-          return yield* compare(fs, git, instance.directory, ref)
+          return currentBranch
         }),
       })
     }),
   )
-
-  export const defaultLayer = layer.pipe(
-    Layer.provide(GitEffect.defaultLayer),
-    Layer.provide(AppFileSystem.defaultLayer),
-  )
 }
diff --git a/packages/opencode/src/server/server.ts b/packages/opencode/src/server/server.ts
index b0872b557..c485654fd 100644
--- a/packages/opencode/src/server/server.ts
+++ b/packages/opencode/src/server/server.ts
@@ -41,7 +41,6 @@ import { websocket } from "hono/bun"
 import { HTTPException } from "hono/http-exception"
 import { errors } from "./error"
 import { Filesystem } from "@/util/filesystem"
-import { Snapshot } from "@/snapshot"
 import { QuestionRoutes } from "./routes/question"
 import { PermissionRoutes } from "./routes/permission"
 import { GlobalRoutes } from "./routes/global"
@@ -333,39 +332,10 @@ export namespace Server {
           },
         }),
         async (c) => {
-          const [branch, default_branch] = await Promise.all([
-            runPromiseInstance(Vcs.Service.use((s) => s.branch())),
-            runPromiseInstance(Vcs.Service.use((s) => s.defaultBranch())),
-          ])
-          return c.json({ branch, default_branch })
-        },
-      )
-      .get(
-        "/vcs/diff",
-        describeRoute({
-          summary: "Get VCS diff",
-          description: "Retrieve the current git diff for the working tree or against the default branch.",
-          operationId: "vcs.diff",
-          responses: {
-            200: {
-              description: "VCS diff",
-              content: {
-                "application/json": {
-                  schema: resolver(Snapshot.FileDiff.array()),
-                },
-              },
-            },
-          },
-        }),
-        validator(
-          "query",
-          z.object({
-            mode: Vcs.Mode,
-          }),
-        ),
-        async (c) => {
-          const mode = c.req.valid("query").mode
-          return c.json(await runPromiseInstance(Vcs.Service.use((s) => s.diff(mode))))
+          const branch = await runPromiseInstance(Vcs.Service.use((s) => s.branch()))
+          return c.json({
+            branch,
+          })
         },
       )
       .get(
diff --git a/packages/opencode/src/storage/storage.ts b/packages/opencode/src/storage/storage.ts
index 99067594d..a78607cdf 100644
--- a/packages/opencode/src/storage/storage.ts
+++ b/packages/opencode/src/storage/storage.ts
@@ -8,7 +8,7 @@ import { Lock } from "../util/lock"
 import { NamedError } from "@opencode-ai/util/error"
 import z from "zod"
 import { Glob } from "../util/glob"
-import { Git } from "@/git"
+import { git } from "@/util/git"
 
 export namespace Storage {
   const log = Log.create({ service: "storage" })
@@ -49,7 +49,7 @@ export namespace Storage {
           }
           if (!worktree) continue
           if (!(await Filesystem.isDir(worktree))) continue
-          const result = await Git.run(["rev-list", "--max-parents=0", "--all"], {
+          const result = await git(["rev-list", "--max-parents=0", "--all"], {
             cwd: worktree,
           })
           const [id] = result
diff --git a/packages/opencode/src/util/git.ts b/packages/opencode/src/util/git.ts
new file mode 100644
index 000000000..731131357
--- /dev/null
+++ b/packages/opencode/src/util/git.ts
@@ -0,0 +1,35 @@
+import { Process } from "./process"
+
+export interface GitResult {
+  exitCode: number
+  text(): string
+  stdout: Buffer
+  stderr: Buffer
+}
+
+/**
+ * Run a git command.
+ *
+ * Uses Process helpers with stdin ignored to avoid protocol pipe inheritance
+ * issues in embedded/client environments.
+ */
+export async function git(args: string[], opts: { cwd: string; env?: Record<string, string> }): Promise<GitResult> {
+  return Process.run(["git", ...args], {
+    cwd: opts.cwd,
+    env: opts.env,
+    stdin: "ignore",
+    nothrow: true,
+  })
+    .then((result) => ({
+      exitCode: result.code,
+      text: () => result.stdout.toString(),
+      stdout: result.stdout,
+      stderr: result.stderr,
+    }))
+    .catch((error) => ({
+      exitCode: 1,
+      text: () => "",
+      stdout: Buffer.alloc(0),
+      stderr: Buffer.from(error instanceof Error ? error.message : String(error)),
+    }))
+}
diff --git a/packages/opencode/src/worktree/index.ts b/packages/opencode/src/worktree/index.ts
index d1f52fff9..6ed0e4820 100644
--- a/packages/opencode/src/worktree/index.ts
+++ b/packages/opencode/src/worktree/index.ts
@@ -12,7 +12,7 @@ import type { ProjectID } from "../project/schema"
 import { fn } from "../util/fn"
 import { Log } from "../util/log"
 import { Process } from "../util/process"
-import { Git } from "@/git"
+import { git } from "../util/git"
 import { BusEvent } from "@/bus/bus-event"
 import { GlobalBus } from "@/bus/global"
 
@@ -250,14 +250,14 @@ export namespace Worktree {
   }
 
   async function sweep(root: string) {
-    const first = await Git.run(["clean", "-ffdx"], { cwd: root })
+    const first = await git(["clean", "-ffdx"], { cwd: root })
     if (first.exitCode === 0) return first
 
     const entries = failed(first)
     if (!entries.length) return first
 
     await prune(root, entries)
-    return Git.run(["clean", "-ffdx"], { cwd: root })
+    return git(["clean", "-ffdx"], { cwd: root })
   }
 
   async function canonical(input: string) {
@@ -276,7 +276,7 @@ export namespace Worktree {
       if (await exists(directory)) continue
 
       const ref = `refs/heads/${branch}`
-      const branchCheck = await Git.run(["show-ref", "--verify", "--quiet", ref], {
+      const branchCheck = await git(["show-ref", "--verify", "--quiet", ref], {
         cwd: Instance.worktree,
       })
       if (branchCheck.exitCode === 0) continue
@@ -348,7 +348,7 @@ export namespace Worktree {
   }
 
   export async function createFromInfo(info: Info, startCommand?: string) {
-    const created = await Git.run(["worktree", "add", "--no-checkout", "-b", info.branch, info.directory], {
+    const created = await git(["worktree", "add", "--no-checkout", "-b", info.branch, info.directory], {
       cwd: Instance.worktree,
     })
     if (created.exitCode !== 0) {
@@ -362,7 +362,7 @@ export namespace Worktree {
 
     return () => {
       const start = async () => {
-        const populated = await Git.run(["reset", "--hard"], { cwd: info.directory })
+        const populated = await git(["reset", "--hard"], { cwd: info.directory })
         if (populated.exitCode !== 0) {
           const message = errorText(populated) || "Failed to populate worktree"
           log.error("worktree checkout failed", { directory: info.directory, message })
@@ -479,10 +479,10 @@ export namespace Worktree {
 
     const stop = async (target: string) => {
       if (!(await exists(target))) return
-      await Git.run(["fsmonitor--daemon", "stop"], { cwd: target })
+      await git(["fsmonitor--daemon", "stop"], { cwd: target })
     }
 
-    const list = await Git.run(["worktree", "list", "--porcelain"], { cwd: Instance.worktree })
+    const list = await git(["worktree", "list", "--porcelain"], { cwd: Instance.worktree })
     if (list.exitCode !== 0) {
       throw new RemoveFailedError({ message: errorText(list) || "Failed to read git worktrees" })
     }
@@ -499,11 +499,11 @@ export namespace Worktree {
     }
 
     await stop(entry.path)
-    const removed = await Git.run(["worktree", "remove", "--force", entry.path], {
+    const removed = await git(["worktree", "remove", "--force", entry.path], {
       cwd: Instance.worktree,
     })
     if (removed.exitCode !== 0) {
-      const next = await Git.run(["worktree", "list", "--porcelain"], { cwd: Instance.worktree })
+      const next = await git(["worktree", "list", "--porcelain"], { cwd: Instance.worktree })
       if (next.exitCode !== 0) {
         throw new RemoveFailedError({
           message: errorText(removed) || errorText(next) || "Failed to remove git worktree",
@@ -520,7 +520,7 @@ export namespace Worktree {
 
     const branch = entry.branch?.replace(/^refs\/heads\//, "")
     if (branch) {
-      const deleted = await Git.run(["branch", "-D", branch], { cwd: Instance.worktree })
+      const deleted = await git(["branch", "-D", branch], { cwd: Instance.worktree })
       if (deleted.exitCode !== 0) {
         throw new RemoveFailedError({ message: errorText(deleted) || "Failed to delete worktree branch" })
       }
@@ -540,7 +540,7 @@ export namespace Worktree {
       throw new ResetFailedError({ message: "Cannot reset the primary workspace" })
     }
 
-    const list = await Git.run(["worktree", "list", "--porcelain"], { cwd: Instance.worktree })
+    const list = await git(["worktree", "list", "--porcelain"], { cwd: Instance.worktree })
     if (list.exitCode !== 0) {
       throw new ResetFailedError({ message: errorText(list) || "Failed to read git worktrees" })
     }
@@ -573,7 +573,7 @@ export namespace Worktree {
       throw new ResetFailedError({ message: "Worktree not found" })
     }
 
-    const remoteList = await Git.run(["remote"], { cwd: Instance.worktree })
+    const remoteList = await git(["remote"], { cwd: Instance.worktree })
     if (remoteList.exitCode !== 0) {
       throw new ResetFailedError({ message: errorText(remoteList) || "Failed to list git remotes" })
     }
@@ -592,17 +592,17 @@ export namespace Worktree {
           : ""
 
     const remoteHead = remote
-      ? await Git.run(["symbolic-ref", `refs/remotes/${remote}/HEAD`], { cwd: Instance.worktree })
+      ? await git(["symbolic-ref", `refs/remotes/${remote}/HEAD`], { cwd: Instance.worktree })
       : { exitCode: 1, stdout: undefined, stderr: undefined }
 
     const remoteRef = remoteHead.exitCode === 0 ? outputText(remoteHead.stdout) : ""
     const remoteTarget = remoteRef ? remoteRef.replace(/^refs\/remotes\//, "") : ""
     const remoteBranch = remote && remoteTarget.startsWith(`${remote}/`) ? remoteTarget.slice(`${remote}/`.length) : ""
 
-    const mainCheck = await Git.run(["show-ref", "--verify", "--quiet", "refs/heads/main"], {
+    const mainCheck = await git(["show-ref", "--verify", "--quiet", "refs/heads/main"], {
       cwd: Instance.worktree,
     })
-    const masterCheck = await Git.run(["show-ref", "--verify", "--quiet", "refs/heads/master"], {
+    const masterCheck = await git(["show-ref", "--verify", "--quiet", "refs/heads/master"], {
       cwd: Instance.worktree,
     })
     const localBranch = mainCheck.exitCode === 0 ? "main" : masterCheck.exitCode === 0 ? "master" : ""
@@ -613,7 +613,7 @@ export namespace Worktree {
     }
 
     if (remoteBranch) {
-      const fetch = await Git.run(["fetch", remote, remoteBranch], { cwd: Instance.worktree })
+      const fetch = await git(["fetch", remote, remoteBranch], { cwd: Instance.worktree })
       if (fetch.exitCode !== 0) {
         throw new ResetFailedError({ message: errorText(fetch) || `Failed to fetch ${target}` })
       }
@@ -625,7 +625,7 @@ export namespace Worktree {
 
     const worktreePath = entry.path
 
-    const resetToTarget = await Git.run(["reset", "--hard", target], { cwd: worktreePath })
+    const resetToTarget = await git(["reset", "--hard", target], { cwd: worktreePath })
     if (resetToTarget.exitCode !== 0) {
       throw new ResetFailedError({ message: errorText(resetToTarget) || "Failed to reset worktree to target" })
     }
@@ -635,26 +635,26 @@ export namespace Worktree {
       throw new ResetFailedError({ message: errorText(clean) || "Failed to clean worktree" })
     }
 
-    const update = await Git.run(["submodule", "update", "--init", "--recursive", "--force"], { cwd: worktreePath })
+    const update = await git(["submodule", "update", "--init", "--recursive", "--force"], { cwd: worktreePath })
     if (update.exitCode !== 0) {
       throw new ResetFailedError({ message: errorText(update) || "Failed to update submodules" })
     }
 
-    const subReset = await Git.run(["submodule", "foreach", "--recursive", "git", "reset", "--hard"], {
+    const subReset = await git(["submodule", "foreach", "--recursive", "git", "reset", "--hard"], {
       cwd: worktreePath,
     })
     if (subReset.exitCode !== 0) {
       throw new ResetFailedError({ message: errorText(subReset) || "Failed to reset submodules" })
     }
 
-    const subClean = await Git.run(["submodule", "foreach", "--recursive", "git", "clean", "-fdx"], {
+    const subClean = await git(["submodule", "foreach", "--recursive", "git", "clean", "-fdx"], {
       cwd: worktreePath,
     })
     if (subClean.exitCode !== 0) {
       throw new ResetFailedError({ message: errorText(subClean) || "Failed to clean submodules" })
     }
 
-    const status = await Git.run(["-c", "core.fsmonitor=false", "status", "--porcelain=v1"], { cwd: worktreePath })
+    const status = await git(["-c", "core.fsmonitor=false", "status", "--porcelain=v1"], { cwd: worktreePath })
     if (status.exitCode !== 0) {
       throw new ResetFailedError({ message: errorText(status) || "Failed to read git status" })
     }
diff --git a/packages/opencode/test/git/git.test.ts b/packages/opencode/test/git/git.test.ts
deleted file mode 100644
index 3427d8eb5..000000000
--- a/packages/opencode/test/git/git.test.ts
+++ /dev/null
@@ -1,107 +0,0 @@
-import { $ } from "bun"
-import { describe, expect, test } from "bun:test"
-import fs from "fs/promises"
-import path from "path"
-import { ManagedRuntime } from "effect"
-import { GitEffect } from "../../src/git/effect"
-import { tmpdir } from "../fixture/fixture"
-
-const weird = process.platform === "win32" ? "space file.txt" : "tab\tfile.txt"
-
-async function withGit<T>(fn: (rt: ManagedRuntime.ManagedRuntime<GitEffect.Service, never>) => Promise<T>) {
-  const rt = ManagedRuntime.make(GitEffect.defaultLayer)
-  try {
-    return await fn(rt)
-  } finally {
-    await rt.dispose()
-  }
-}
-
-describe("Git", () => {
-  test("branch() returns current branch name", async () => {
-    await using tmp = await tmpdir({ git: true })
-
-    await withGit(async (rt) => {
-      const branch = await rt.runPromise(GitEffect.Service.use((git) => git.branch(tmp.path)))
-      expect(branch).toBeDefined()
-      expect(typeof branch).toBe("string")
-    })
-  })
-
-  test("branch() returns undefined for non-git directories", async () => {
-    await using tmp = await tmpdir()
-
-    await withGit(async (rt) => {
-      const branch = await rt.runPromise(GitEffect.Service.use((git) => git.branch(tmp.path)))
-      expect(branch).toBeUndefined()
-    })
-  })
-
-  test("defaultBranch() uses init.defaultBranch when available", async () => {
-    await using tmp = await tmpdir({ git: true })
-    await $`git branch -M trunk`.cwd(tmp.path).quiet()
-    await $`git config init.defaultBranch trunk`.cwd(tmp.path).quiet()
-
-    await withGit(async (rt) => {
-      const branch = await rt.runPromise(GitEffect.Service.use((git) => git.defaultBranch(tmp.path)))
-      expect(branch?.name).toBe("trunk")
-      expect(branch?.ref).toBe("trunk")
-    })
-  })
-
-  test("status() handles special filenames", async () => {
-    await using tmp = await tmpdir({ git: true })
-    const file = weird
-    await fs.writeFile(path.join(tmp.path, file), "hello\n", "utf-8")
-
-    await withGit(async (rt) => {
-      const status = await rt.runPromise(GitEffect.Service.use((git) => git.status(tmp.path)))
-      expect(status).toEqual(
-        expect.arrayContaining([
-          expect.objectContaining({
-            file,
-            status: "added",
-          }),
-        ]),
-      )
-    })
-  })
-
-  test("diff(), stats(), and mergeBase() parse tracked changes", async () => {
-    await using tmp = await tmpdir({ git: true })
-    await $`git branch -M main`.cwd(tmp.path).quiet()
-    const file = weird
-    await fs.writeFile(path.join(tmp.path, file), "before\n", "utf-8")
-    await $`git add .`.cwd(tmp.path).quiet()
-    await $`git commit --no-gpg-sign -m "add file"`.cwd(tmp.path).quiet()
-    await $`git checkout -b feature/test`.cwd(tmp.path).quiet()
-    await fs.writeFile(path.join(tmp.path, file), "after\n", "utf-8")
-
-    await withGit(async (rt) => {
-      const [base, diff, stats] = await Promise.all([
-        rt.runPromise(GitEffect.Service.use((git) => git.mergeBase(tmp.path, "main"))),
-        rt.runPromise(GitEffect.Service.use((git) => git.diff(tmp.path, "HEAD"))),
-        rt.runPromise(GitEffect.Service.use((git) => git.stats(tmp.path, "HEAD"))),
-      ])
-
-      expect(base).toBeTruthy()
-      expect(diff).toEqual(
-        expect.arrayContaining([
-          expect.objectContaining({
-            file,
-            status: "modified",
-          }),
-        ]),
-      )
-      expect(stats).toEqual(
-        expect.arrayContaining([
-          expect.objectContaining({
-            file,
-            additions: 1,
-            deletions: 1,
-          }),
-        ]),
-      )
-    })
-  })
-})
diff --git a/packages/opencode/test/project/project.test.ts b/packages/opencode/test/project/project.test.ts
index e6588fb38..a71fe0528 100644
--- a/packages/opencode/test/project/project.test.ts
+++ b/packages/opencode/test/project/project.test.ts
@@ -10,48 +10,45 @@ import { ProjectID } from "../../src/project/schema"
 
 Log.init({ print: false })
 
-const gitModule = await import("../../src/git")
-const originalGit = gitModule.Git.run
+const gitModule = await import("../../src/util/git")
+const originalGit = gitModule.git
 
 type Mode = "none" | "rev-list-fail" | "top-fail" | "common-dir-fail"
 let mode: Mode = "none"
 
-mock.module("../../src/git", () => ({
-  Git: {
-    ...gitModule.Git,
-    run: (args: string[], opts: { cwd: string; env?: Record<string, string> }) => {
-      const cmd = ["git", ...args].join(" ")
-      if (
-        mode === "rev-list-fail" &&
-        cmd.includes("git rev-list") &&
-        cmd.includes("--max-parents=0") &&
-        cmd.includes("HEAD")
-      ) {
-        return Promise.resolve({
-          exitCode: 128,
-          text: () => "",
-          stdout: Buffer.from(""),
-          stderr: Buffer.from("fatal"),
-        })
-      }
-      if (mode === "top-fail" && cmd.includes("git rev-parse") && cmd.includes("--show-toplevel")) {
-        return Promise.resolve({
-          exitCode: 128,
-          text: () => "",
-          stdout: Buffer.from(""),
-          stderr: Buffer.from("fatal"),
-        })
-      }
-      if (mode === "common-dir-fail" && cmd.includes("git rev-parse") && cmd.includes("--git-common-dir")) {
-        return Promise.resolve({
-          exitCode: 128,
-          text: () => "",
-          stdout: Buffer.from(""),
-          stderr: Buffer.from("fatal"),
-        })
-      }
-      return originalGit(args, opts)
-    },
+mock.module("../../src/util/git", () => ({
+  git: (args: string[], opts: { cwd: string; env?: Record<string, string> }) => {
+    const cmd = ["git", ...args].join(" ")
+    if (
+      mode === "rev-list-fail" &&
+      cmd.includes("git rev-list") &&
+      cmd.includes("--max-parents=0") &&
+      cmd.includes("HEAD")
+    ) {
+      return Promise.resolve({
+        exitCode: 128,
+        text: () => Promise.resolve(""),
+        stdout: Buffer.from(""),
+        stderr: Buffer.from("fatal"),
+      })
+    }
+    if (mode === "top-fail" && cmd.includes("git rev-parse") && cmd.includes("--show-toplevel")) {
+      return Promise.resolve({
+        exitCode: 128,
+        text: () => Promise.resolve(""),
+        stdout: Buffer.from(""),
+        stderr: Buffer.from("fatal"),
+      })
+    }
+    if (mode === "common-dir-fail" && cmd.includes("git rev-parse") && cmd.includes("--git-common-dir")) {
+      return Promise.resolve({
+        exitCode: 128,
+        text: () => Promise.resolve(""),
+        stdout: Buffer.from(""),
+        stderr: Buffer.from("fatal"),
+      })
+    }
+    return originalGit(args, opts)
   },
 }))
 
diff --git a/packages/opencode/test/project/vcs.test.ts b/packages/opencode/test/project/vcs.test.ts
index c0967993f..90f445ed7 100644
--- a/packages/opencode/test/project/vcs.test.ts
+++ b/packages/opencode/test/project/vcs.test.ts
@@ -23,7 +23,7 @@ function withVcs(
 ) {
   return withServices(
     directory,
-    Layer.merge(FileWatcher.layer, Vcs.defaultLayer),
+    Layer.merge(FileWatcher.layer, Vcs.layer),
     async (rt) => {
       await rt.runPromise(FileWatcher.Service.use(() => Effect.void))
       await rt.runPromise(Vcs.Service.use(() => Effect.void))
@@ -34,15 +34,7 @@ function withVcs(
   )
 }
 
-function withVcsOnly(
-  directory: string,
-  body: (rt: ManagedRuntime.ManagedRuntime<Vcs.Service, never>) => Promise<void>,
-) {
-  return withServices(directory, Vcs.defaultLayer, body)
-}
-
 type BranchEvent = { directory?: string; payload: { type: string; properties: { branch?: string } } }
-const weird = process.platform === "win32" ? "space file.txt" : "tab\tfile.txt"
 
 /** Wait for a Vcs.Event.BranchUpdated event on GlobalBus, with retry polling as fallback */
 function nextBranchUpdate(directory: string, timeout = 10_000) {
@@ -129,104 +121,3 @@ describeVcs("Vcs", () => {
     })
   })
 })
-
-describe("Vcs diff", () => {
-  afterEach(() => Instance.disposeAll())
-
-  test("defaultBranch() falls back to main", async () => {
-    await using tmp = await tmpdir({ git: true })
-    await $`git branch -M main`.cwd(tmp.path).quiet()
-
-    await withVcsOnly(tmp.path, async (rt) => {
-      const branch = await rt.runPromise(Vcs.Service.use((s) => s.defaultBranch()))
-      expect(branch).toBe("main")
-    })
-  })
-
-  test("defaultBranch() uses init.defaultBranch when available", async () => {
-    await using tmp = await tmpdir({ git: true })
-    await $`git branch -M trunk`.cwd(tmp.path).quiet()
-    await $`git config init.defaultBranch trunk`.cwd(tmp.path).quiet()
-
-    await withVcsOnly(tmp.path, async (rt) => {
-      const branch = await rt.runPromise(Vcs.Service.use((s) => s.defaultBranch()))
-      expect(branch).toBe("trunk")
-    })
-  })
-
-  test("detects current branch from the active worktree", async () => {
-    await using tmp = await tmpdir({ git: true })
-    await using wt = await tmpdir()
-    await $`git branch -M main`.cwd(tmp.path).quiet()
-    const dir = path.join(wt.path, "feature")
-    await $`git worktree add -b feature/test ${dir} HEAD`.cwd(tmp.path).quiet()
-
-    await withVcsOnly(dir, async (rt) => {
-      const [branch, base] = await Promise.all([
-        rt.runPromise(Vcs.Service.use((s) => s.branch())),
-        rt.runPromise(Vcs.Service.use((s) => s.defaultBranch())),
-      ])
-      expect(branch).toBe("feature/test")
-      expect(base).toBe("main")
-    })
-  })
-
-  test("diff('git') returns uncommitted changes", async () => {
-    await using tmp = await tmpdir({ git: true })
-    await fs.writeFile(path.join(tmp.path, "file.txt"), "original\n", "utf-8")
-    await $`git add .`.cwd(tmp.path).quiet()
-    await $`git commit --no-gpg-sign -m "add file"`.cwd(tmp.path).quiet()
-    await fs.writeFile(path.join(tmp.path, "file.txt"), "changed\n", "utf-8")
-
-    await withVcsOnly(tmp.path, async (rt) => {
-      const diff = await rt.runPromise(Vcs.Service.use((s) => s.diff("git")))
-      expect(diff).toEqual(
-        expect.arrayContaining([
-          expect.objectContaining({
-            file: "file.txt",
-            status: "modified",
-          }),
-        ]),
-      )
-    })
-  })
-
-  test("diff('git') handles special filenames", async () => {
-    await using tmp = await tmpdir({ git: true })
-    const file = weird
-    await fs.writeFile(path.join(tmp.path, file), "hello\n", "utf-8")
-
-    await withVcsOnly(tmp.path, async (rt) => {
-      const diff = await rt.runPromise(Vcs.Service.use((s) => s.diff("git")))
-      expect(diff).toEqual(
-        expect.arrayContaining([
-          expect.objectContaining({
-            file,
-            status: "added",
-          }),
-        ]),
-      )
-    })
-  })
-
-  test("diff('branch') returns changes against default branch", async () => {
-    await using tmp = await tmpdir({ git: true })
-    await $`git branch -M main`.cwd(tmp.path).quiet()
-    await $`git checkout -b feature/test`.cwd(tmp.path).quiet()
-    await fs.writeFile(path.join(tmp.path, "branch.txt"), "hello\n", "utf-8")
-    await $`git add .`.cwd(tmp.path).quiet()
-    await $`git commit --no-gpg-sign -m "branch file"`.cwd(tmp.path).quiet()
-
-    await withVcsOnly(tmp.path, async (rt) => {
-      const diff = await rt.runPromise(Vcs.Service.use((s) => s.diff("branch")))
-      expect(diff).toEqual(
-        expect.arrayContaining([
-          expect.objectContaining({
-            file: "branch.txt",
-            status: "added",
-          }),
-        ]),
-      )
-    })
-  })
-})
diff --git a/packages/sdk/js/src/v2/gen/sdk.gen.ts b/packages/sdk/js/src/v2/gen/sdk.gen.ts
index 6ec934e6b..aa759bb1e 100644
--- a/packages/sdk/js/src/v2/gen/sdk.gen.ts
+++ b/packages/sdk/js/src/v2/gen/sdk.gen.ts
@@ -172,7 +172,6 @@ import type {
   TuiSelectSessionResponses,
   TuiShowToastResponses,
   TuiSubmitPromptResponses,
-  VcsDiffResponses,
   VcsGetResponses,
   WorktreeCreateErrors,
   WorktreeCreateInput,
@@ -3662,38 +3661,6 @@ export class Vcs extends HeyApiClient {
       ...params,
     })
   }
-
-  /**
-   * Get VCS diff
-   *
-   * Retrieve the current git diff for the working tree or against the default branch.
-   */
-  public diff<ThrowOnError extends boolean = false>(
-    parameters: {
-      directory?: string
-      workspace?: string
-      mode: "git" | "branch"
-    },
-    options?: Options<never, ThrowOnError>,
-  ) {
-    const params = buildClientParams(
-      [parameters],
-      [
-        {
-          args: [
-            { in: "query", key: "directory" },
-            { in: "query", key: "workspace" },
-            { in: "query", key: "mode" },
-          ],
-        },
-      ],
-    )
-    return (options?.client ?? this.client).get<VcsDiffResponses, unknown, ThrowOnError>({
-      url: "/vcs/diff",
-      ...options,
-      ...params,
-    })
-  }
 }
 
 export class Command extends HeyApiClient {
diff --git a/packages/sdk/js/src/v2/gen/types.gen.ts b/packages/sdk/js/src/v2/gen/types.gen.ts
index 942e1c3e1..41aa24817 100644
--- a/packages/sdk/js/src/v2/gen/types.gen.ts
+++ b/packages/sdk/js/src/v2/gen/types.gen.ts
@@ -1889,8 +1889,7 @@ export type Path = {
 }
 
 export type VcsInfo = {
-  branch?: string
-  default_branch?: string
+  branch: string
 }
 
 export type Command = {
@@ -4834,26 +4833,6 @@ export type VcsGetResponses = {
 
 export type VcsGetResponse = VcsGetResponses[keyof VcsGetResponses]
 
-export type VcsDiffData = {
-  body?: never
-  path?: never
-  query: {
-    directory?: string
-    workspace?: string
-    mode: "git" | "branch"
-  }
-  url: "/vcs/diff"
-}
-
-export type VcsDiffResponses = {
-  /**
-   * VCS diff
-   */
-  200: Array<FileDiff>
-}
-
-export type VcsDiffResponse = VcsDiffResponses[keyof VcsDiffResponses]
-
 export type CommandListData = {
   body?: never
   path?: never
diff --git a/packages/sdk/openapi.json b/packages/sdk/openapi.json
index 41819ef12..350395423 100644
--- a/packages/sdk/openapi.json
+++ b/packages/sdk/openapi.json
@@ -6576,59 +6576,6 @@
         ]
       }
     },
-    "/vcs/diff": {
-      "get": {
-        "operationId": "vcs.diff",
-        "parameters": [
-          {
-            "in": "query",
-            "name": "directory",
-            "schema": {
-              "type": "string"
-            }
-          },
-          {
-            "in": "query",
-            "name": "workspace",
-            "schema": {
-              "type": "string"
-            }
-          },
-          {
-            "in": "query",
-            "name": "mode",
-            "schema": {
-              "type": "string",
-              "enum": ["git", "branch"]
-            },
-            "required": true
-          }
-        ],
-        "summary": "Get VCS diff",
-        "description": "Retrieve the current git diff for the working tree or against the default branch.",
-        "responses": {
-          "200": {
-            "description": "VCS diff",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "type": "array",
-                  "items": {
-                    "$ref": "#/components/schemas/FileDiff"
-                  }
-                }
-              }
-            }
-          }
-        },
-        "x-codeSamples": [
-          {
-            "lang": "js",
-            "source": "import { createOpencodeClient } from \"@opencode-ai/sdk\n\nconst client = createOpencodeClient()\nawait client.vcs.diff({\n  ...\n})"
-          }
-        ]
-      }
-    },
     "/command": {
       "get": {
         "operationId": "command.list",
@@ -11981,11 +11928,9 @@
         "properties": {
           "branch": {
             "type": "string"
-          },
-          "default_branch": {
-            "type": "string"
           }
-        }
+        },
+        "required": ["branch"]
       },
       "Command": {
         "type": "object",
diff --git a/packages/ui/src/i18n/en.ts b/packages/ui/src/i18n/en.ts
index d9f724fce..18823aeaa 100644
--- a/packages/ui/src/i18n/en.ts
+++ b/packages/ui/src/i18n/en.ts
@@ -1,7 +1,5 @@
 export const dict: Record<string, string> = {
   "ui.sessionReview.title": "Session changes",
-  "ui.sessionReview.title.git": "Git changes",
-  "ui.sessionReview.title.branch": "Branch changes",
   "ui.sessionReview.title.lastTurn": "Last turn changes",
   "ui.sessionReview.diffStyle.unified": "Unified",
   "ui.sessionReview.diffStyle.split": "Split",