diff --git a/mobile/src/components/MobilePrComposeSheet.tsx b/mobile/src/components/MobilePrComposeSheet.tsx
deleted file mode 100644
index 124f91922..000000000
--- a/mobile/src/components/MobilePrComposeSheet.tsx
+++ /dev/null
@@ -1,52 +0,0 @@
-import { Linking } from 'react-native'
-import { BottomDrawer } from './BottomDrawer'
-import { MobilePrComposeForm, type PrComposePrefill } from './pr-sidebar/MobilePrComposeForm'
-import type { RpcClient } from '../transport/rpc-client'
-
-type Props = {
-  visible: boolean
-  client: RpcClient | null
-  worktreeId: string
-  prefill: PrComposePrefill
-  // Head branch — enables the base≠head guard and the "from <branch>" hint.
-  head?: string | null
-  onClose: () => void
-  onCreated: (url: string, warning?: string) => void
-}
-
-// BottomDrawer wrapper around the inline compose form, for full-screen roots
-// (source-control modals). The PR sidebar empty-state renders MobilePrComposeForm
-// inline instead, since a BottomDrawer overlay nested in a ScrollView clips it.
-export function MobilePrComposeSheet({
-  visible,
-  client,
-  worktreeId,
-  prefill,
-  head,
-  onClose,
-  onCreated
-}: Props) {
-  return (
-    <BottomDrawer visible={visible} onClose={onClose}>
-      {/* Why: key on visible + prefill fields so reopening (or a new prefill)
-          remounts the form with fresh initial values; the previous sheet reset
-          its fields via an effect on the same signals. */}
-      <MobilePrComposeForm
-        key={`${visible}:${prefill.title}:${prefill.base}:${prefill.body}`}
-        client={client}
-        worktreeId={worktreeId}
-        prefill={prefill}
-        head={head}
-        onCancel={onClose}
-        onCreated={onCreated}
-      />
-    </BottomDrawer>
-  )
-}
-
-export function openMobilePrUrl(url: string): void {
-  // Why: Linking.openURL rejects when iOS/Android can't open the URL (no app,
-  // bad scheme, etc.). Without a catch that surfaces as LogBox "Uncaught
-  // (in promise) Error: Unable to open URL…" over the PR screen.
-  void Linking.openURL(url).catch(() => {})
-}
diff --git a/mobile/src/components/mobile-pr-url.ts b/mobile/src/components/mobile-pr-url.ts
new file mode 100644
index 000000000..3f642d5cc
--- /dev/null
+++ b/mobile/src/components/mobile-pr-url.ts
@@ -0,0 +1,6 @@
+import { Linking } from 'react-native'
+
+export function openMobilePrUrl(url: string): void {
+  // Prevent unhandled rejections when no app accepts the URL.
+  void Linking.openURL(url).catch(() => {})
+}
diff --git a/mobile/src/components/pr-sidebar/MobilePrComposeForm.tsx b/mobile/src/components/pr-sidebar/MobilePrComposeForm.tsx
index 618e399d1..d832d38c8 100644
--- a/mobile/src/components/pr-sidebar/MobilePrComposeForm.tsx
+++ b/mobile/src/components/pr-sidebar/MobilePrComposeForm.tsx
@@ -38,11 +38,7 @@ type Props = {
   onCreated: (url: string, warning?: string) => void
 }
 
-// PR compose form body: title/body/base/draft with AI prefill (git.generate
-// PullRequestFields), submitting via createMobilePr. Renders a plain View so it
-// can sit inline inside the PR sidebar's existing ScrollView (a BottomDrawer
-// overlay trapped in a ScrollView clips the form). The BottomDrawer wrapper
-// MobilePrComposeSheet reuses this body at full-screen roots.
+// A plain View keeps the compose form usable inside the PR sidebar ScrollView.
 export function MobilePrComposeForm({
   client,
   worktreeId,
diff --git a/mobile/src/components/pr-sidebar/PRSidebarHeader.tsx b/mobile/src/components/pr-sidebar/PRSidebarHeader.tsx
index 8a399babe..335108e07 100644
--- a/mobile/src/components/pr-sidebar/PRSidebarHeader.tsx
+++ b/mobile/src/components/pr-sidebar/PRSidebarHeader.tsx
@@ -7,7 +7,7 @@ import type { MobilePrTitleAction } from '../../session/use-mobile-pr-title-acti
 import { prStateBadge } from './pr-checks-presentation'
 import { statusColor } from './pr-sidebar-status-color'
 import { canEditPRTitle } from '../../session/pr-title-edit'
-import { openMobilePrUrl } from '../MobilePrComposeSheet'
+import { openMobilePrUrl } from '../mobile-pr-url'
 import { mobilePrSidebarStyles as styles } from './mobile-pr-sidebar-styles'
 import { prCommentComposerStyles as composerStyles } from './pr-comment-composer-styles'
 
diff --git a/mobile/src/components/pr-sidebar/PrSidebarCreateEmptyState.tsx b/mobile/src/components/pr-sidebar/PrSidebarCreateEmptyState.tsx
index ebc724d94..cffde86ea 100644
--- a/mobile/src/components/pr-sidebar/PrSidebarCreateEmptyState.tsx
+++ b/mobile/src/components/pr-sidebar/PrSidebarCreateEmptyState.tsx
@@ -18,7 +18,7 @@ import {
   runMobileHostedReviewCreateIntent
 } from '../../source-control/mobile-hosted-review-create-intent-runner'
 import { fetchWorktreeLinkedPR } from '../../source-control/mobile-pr-link'
-import { openMobilePrUrl } from '../MobilePrComposeSheet'
+import { openMobilePrUrl } from '../mobile-pr-url'
 import { MobileLinkPrForm } from './MobileLinkPrForm'
 import { prCreateEmptyStateStyles as styles } from './pr-create-empty-state-styles'
 
diff --git a/mobile/src/session/mobile-diff-review-state.ts b/mobile/src/session/mobile-diff-review-state.ts
index a9bab2347..a9680a66d 100644
--- a/mobile/src/session/mobile-diff-review-state.ts
+++ b/mobile/src/session/mobile-diff-review-state.ts
@@ -104,31 +104,6 @@ export function mergeMobileDiffReviewState(
   }
 }
 
-export function markMobileDiffReviewFileOpened(
-  state: MobileDiffReviewState,
-  descriptor: MobileDiffReviewFileDescriptor,
-  now: number
-): MobileDiffReviewState {
-  const previous = state.files[descriptor.key]
-  return {
-    ...state,
-    updatedAt: now,
-    files: {
-      ...state.files,
-      [descriptor.key]: {
-        key: descriptor.key,
-        filePath: descriptor.filePath,
-        oldPath: descriptor.oldPath,
-        scope: descriptor.scope,
-        reviewedAt: previous?.reviewedAt,
-        reviewDiffIdentity: previous?.reviewDiffIdentity,
-        lastOpenedAt: now,
-        lastSeenDiffIdentity: descriptor.diffIdentity
-      }
-    }
-  }
-}
-
 export function markMobileDiffReviewFileReviewed(
   state: MobileDiffReviewState,
   descriptor: MobileDiffReviewFileDescriptor,
diff --git a/mobile/src/session/use-native-chat-action-outcomes.ts b/mobile/src/session/use-native-chat-action-outcomes.ts
index 51a6f831b..a81d08dfd 100644
--- a/mobile/src/session/use-native-chat-action-outcomes.ts
+++ b/mobile/src/session/use-native-chat-action-outcomes.ts
@@ -1,5 +1,4 @@
 import { useCallback } from 'react'
-import type { MobileNativeChatSendOutcome } from './mobile-native-chat-send'
 
 /** Wraps a chat card action so an accepted write also retires the route's held
  *  failure banner.
@@ -23,15 +22,3 @@ export function useNativeChatAcceptedAction<Params extends unknown[]>(
     [action, onAccepted]
   )
 }
-
-/** Boolean surface for callers with no pre-pasted input: 'unknown' stays true
- *  (the send usually landed; the optimistic echo is already held unconfirmed). */
-export function useNativeChatSentFlag(
-  send: (text: string, images?: string[]) => Promise<MobileNativeChatSendOutcome>
-): (text: string, images?: string[]) => Promise<boolean> {
-  return useCallback(
-    async (text: string, images?: string[]): Promise<boolean> =>
-      (await send(text, images)) !== 'rejected',
-    [send]
-  )
-}
diff --git a/mobile/src/source-control/MobileSourceControlModals.tsx b/mobile/src/source-control/MobileSourceControlModals.tsx
index b58d25207..f9659240e 100644
--- a/mobile/src/source-control/MobileSourceControlModals.tsx
+++ b/mobile/src/source-control/MobileSourceControlModals.tsx
@@ -1,7 +1,7 @@
 import { ActionSheetModal, type ActionSheetAction } from '../components/ActionSheetModal'
 import { ConfirmModal } from '../components/ConfirmModal'
 import { PickerModal } from '../components/PickerModal'
-import { openMobilePrUrl } from '../components/MobilePrComposeSheet'
+import { openMobilePrUrl } from '../components/mobile-pr-url'
 import { MobileBranchDiffPreviewDrawer } from './MobileBranchDiffPreviewDrawer'
 import type { MobileSourceControlState } from './use-mobile-source-control-state'
 
diff --git a/mobile/src/source-control/MobileSourceControlPanel.tsx b/mobile/src/source-control/MobileSourceControlPanel.tsx
index 9c3ebb270..3244d440b 100644
--- a/mobile/src/source-control/MobileSourceControlPanel.tsx
+++ b/mobile/src/source-control/MobileSourceControlPanel.tsx
@@ -18,7 +18,7 @@ import { isMobileConflictAborting } from './mobile-source-control-conflict-abort
 import { useMobilePrSidebarController } from '../session/use-mobile-pr-sidebar-controller'
 import { prSidebarDetailsNeedFetch } from '../session/mobile-pr-sidebar-state'
 import { MobilePrViewPanelBody } from '../components/pr-sidebar/MobilePrViewPanel'
-import { openMobilePrUrl } from '../components/MobilePrComposeSheet'
+import { openMobilePrUrl } from '../components/mobile-pr-url'
 
 export type MobileSourceControlPanelProps = {
   hostId: string
diff --git a/mobile/src/source-control/mobile-base-ref-search.ts b/mobile/src/source-control/mobile-base-ref-search.ts
index 8e51fe0d5..84a962a41 100644
--- a/mobile/src/source-control/mobile-base-ref-search.ts
+++ b/mobile/src/source-control/mobile-base-ref-search.ts
@@ -2,13 +2,6 @@ import type { RpcClient } from '../transport/rpc-client'
 import type { RpcSuccess } from '../transport/types'
 import { mobileRepoSelectorFromWorktreeId } from './mobile-pr-create'
 
-// Base-branch selection for the create-PR composer, mirroring the desktop
-// useCreatePullRequestDialogFields flow: a default ref from repo.baseRefDefault and
-// a debounced search via repo.searchRefs (both allowlisted for mobile). Result
-// mapping is pure + unit-tested; the wrappers are thin sendRequest calls.
-
-// Defensively normalize the repo.searchRefs payload (`{ refs: string[] }`) to a
-// clean string[] — drops non-string / malformed entries instead of throwing.
 export function mapBaseRefResults(raw: unknown): string[] {
   if (raw === null || typeof raw !== 'object') {
     return []
@@ -20,20 +13,6 @@ export function mapBaseRefResults(raw: unknown): string[] {
   return refs.filter((r): r is string => typeof r === 'string' && r.length > 0)
 }
 
-export async function fetchDefaultBaseRef(
-  client: Pick<RpcClient, 'sendRequest'>,
-  worktreeId: string
-): Promise<string | null> {
-  const response = await client.sendRequest('repo.baseRefDefault', {
-    repo: mobileRepoSelectorFromWorktreeId(worktreeId)
-  })
-  if (!response.ok) {
-    return null
-  }
-  const result = (response as RpcSuccess).result as { defaultBaseRef?: string | null }
-  return typeof result?.defaultBaseRef === 'string' ? result.defaultBaseRef : null
-}
-
 export async function searchBaseRefs(
   client: Pick<RpcClient, 'sendRequest'>,
   worktreeId: string,
diff --git a/mobile/src/source-control/mobile-open-pr-prefill.ts b/mobile/src/source-control/mobile-open-pr-prefill.ts
index 705b4dc68..2369095f3 100644
--- a/mobile/src/source-control/mobile-open-pr-prefill.ts
+++ b/mobile/src/source-control/mobile-open-pr-prefill.ts
@@ -1,14 +1,7 @@
-import type { RpcClient } from '../transport/rpc-client'
 import { readMobileGitStatusResult } from '../session/mobile-diff-review-rpc'
 import type { MobileGitStatusResult } from './mobile-git-status'
-import { resolveMobilePrPrefill, type MobilePrPrefill } from './mobile-pr-create'
 
-// Resolves the create-PR prefill from a git status snapshot. Split from the
-// runners hook to keep that file under the line limit.
-
-// Reads a fresh git.status after a push so the prefill reflects the just-pushed
-// branch's upstream/ahead data instead of the pre-push captured status. Best-effort:
-// returns the captured status on any read failure.
+// Refresh after a push when possible so readiness reflects the new upstream state.
 export async function readFreshGitStatus(
   worktreeId: string,
   fallback: MobileGitStatusResult | null,
@@ -22,23 +15,6 @@ export async function readFreshGitStatus(
   }
 }
 
-export async function buildOpenPrPrefill(
-  client: Pick<RpcClient, 'sendRequest'> | null,
-  worktreeId: string,
-  status: MobileGitStatusResult | null,
-  branchLabel: string
-): Promise<MobilePrPrefill> {
-  if (!client) {
-    return { provider: 'github', base: 'main', title: branchLabel, body: '' }
-  }
-  const gitReadiness = getMobilePrEligibilityReadiness(status)
-  return resolveMobilePrPrefill(client, worktreeId, {
-    branch: status?.branch,
-    title: branchLabel,
-    ...gitReadiness
-  })
-}
-
 export function getMobilePrEligibilityReadiness(status: MobileGitStatusResult | null): {
   hasUncommittedChanges?: boolean
   hasUpstream?: boolean