diff --git a/proto/backend.proto b/proto/backend.proto
index 2b63fdf2e..e1a124bd0 100644
--- a/proto/backend.proto
+++ b/proto/backend.proto
@@ -4,6 +4,9 @@ import "fluent.proto";
 
 package backend_proto;
 
+// Generic containers
+///////////////////////////////////////////////////////////
+
 message Empty {}
 
 message OptionalInt32 {
@@ -14,9 +17,33 @@ message OptionalUInt32 {
     uint32 val = 1;
 }
 
+message Int32 {
+    sint32 val = 1;
+}
+
+message Int64 {
+    int64 val = 1;
+}
+
+message String {
+    string val = 1;
+}
+
+// New style RPC definitions
+///////////////////////////////////////////////////////////
+
 service BackendService {
     rpc RenderExistingCard (RenderExistingCardIn) returns (RenderCardOut);
     rpc RenderUncommittedCard (RenderUncommittedCardIn) returns (RenderCardOut);
+    rpc SchedTimingToday (Empty) returns (SchedTimingTodayOut);
+    rpc DeckTree (DeckTreeIn) returns (DeckTreeNode);
+    rpc SearchCards (SearchCardsIn) returns (SearchCardsOut);
+    rpc SearchNotes (SearchNotesIn) returns (SearchNotesOut);
+    rpc CheckMedia (Empty) returns (CheckMediaOut);
+    rpc LocalMinutesWest (Int64) returns (Int32);
+    rpc StripAvTags (String) returns (String);
+    rpc ExtractAVTags (ExtractAVTagsIn) returns (ExtractAVTagsOut);
+    rpc ExtractLatex (ExtractLatexIn) returns (ExtractLatexOut);
 }
 
 // Protobuf stored in .anki2 files
@@ -257,20 +284,13 @@ message I18nBackendInit {
     string locale_folder_path = 5;
 }
 
+// Legacy enum - needs migrating to RPC above
+///////////////////////////////////////////////////////////
+
 message BackendInput {
     oneof value {
-        Empty sched_timing_today = 17;
-        DeckTreeIn deck_tree = 18;
-        SearchCardsIn search_cards = 19;
-        SearchNotesIn search_notes = 20;
-        RenderUncommittedCardIn render_uncommitted_card = 21;
-        int64 local_minutes_west = 22;
-        string strip_av_tags = 23;
-        ExtractAVTagsIn extract_av_tags = 24;
-        ExtractLatexIn extract_latex = 25;
         AddMediaFileIn add_media_file = 26;
         SyncMediaIn sync_media = 27;
-        Empty check_media = 28;
         TrashMediaFilesIn trash_media_files = 29;
         TranslateStringIn translate_string = 30;
         FormatTimeSpanIn format_time_span = 31;
@@ -327,7 +347,6 @@ message BackendInput {
         int32 set_local_minutes_west = 83;
         Empty get_preferences = 84;
         Preferences set_preferences = 85;
-        RenderExistingCardIn render_existing_card = 86;
         Note cloze_numbers_in_note = 87;
     }
 }
@@ -335,10 +354,6 @@ message BackendInput {
 message BackendOutput {
     oneof value {
         // infallible commands
-        sint32 local_minutes_west = 22;
-        string strip_av_tags = 23;
-        ExtractAVTagsOut extract_av_tags = 24;
-        ExtractLatexOut extract_latex = 25;
         string translate_string = 30;
         string format_time_span = 31;
         string studied_today = 32;
@@ -347,14 +362,8 @@ message BackendOutput {
         ClozeNumbersInNoteOut cloze_numbers_in_note = 87;
 
         // fallible commands
-        SchedTimingTodayOut sched_timing_today = 17;
-        DeckTreeNode deck_tree = 18;
-        SearchCardsOut search_cards = 19;
-        SearchNotesOut search_notes = 20;
-        RenderCardOut render_uncommitted_card = 21;
         string add_media_file = 26;
         Empty sync_media = 27;
-        MediaCheckOut check_media = 28;
         Empty trash_media_files = 29;
         Empty empty_trash = 34;
         Empty restore_trash = 35;
@@ -405,7 +414,6 @@ message BackendOutput {
         Empty set_local_minutes_west = 83;
         Preferences get_preferences = 84;
         Empty set_preferences = 85;
-        RenderCardOut render_existing_card = 86;
         bytes get_stock_notetype_legacy = 60;
 
         BackendError error = 2047;
@@ -580,7 +588,7 @@ message SyncMediaIn {
     string endpoint = 2;
 }
 
-message MediaCheckOut {
+message CheckMediaOut {
     repeated string unused = 1;
     repeated string missing = 2;
     string report = 3;
diff --git a/pylib/anki/collection.py b/pylib/anki/collection.py
index 944df96f0..ea54a6091 100644
--- a/pylib/anki/collection.py
+++ b/pylib/anki/collection.py
@@ -26,7 +26,7 @@ from anki.lang import _
 from anki.media import MediaManager, media_paths_from_col_path
 from anki.models import ModelManager
 from anki.notes import Note
-from anki.rsbackend import TR, DBError, RustBackend
+from anki.rsbackend import TR, DBError, RustBackend, pb
 from anki.sched import Scheduler as V1Scheduler
 from anki.schedv2 import Scheduler as V2Scheduler
 from anki.tags import TagManager
@@ -393,7 +393,21 @@ select id from notes where id in %s and id not in (select nid from cards)"""
     def find_cards(
         self, query: str, order: Union[bool, str, int] = False, reverse: bool = False,
     ) -> Sequence[int]:
-        return self.backend.search_cards(query, order, reverse)
+        if isinstance(order, str):
+            mode = pb.SortOrder(custom=order)
+        elif order is True:
+            mode = pb.SortOrder(from_config=pb.Empty())
+        elif order is False:
+            mode = pb.SortOrder(none=pb.Empty())
+        else:
+            # sadly we can't use the protobuf type in a Union, so we
+            # have to accept an int and convert it
+            BKind = pb.BuiltinSearchOrder.BuiltinSortKind  # pylint: disable=no-member
+            kind = BKind.Value(BKind.Name(order))
+            mode = pb.SortOrder(
+                builtin=pb.BuiltinSearchOrder(kind=kind, reverse=reverse)
+            )
+        return self.backend.search_cards(query, mode)
 
     def find_notes(self, query: str) -> Sequence[int]:
         return self.backend.search_notes(query)
diff --git a/pylib/anki/decks.py b/pylib/anki/decks.py
index 9a481fd70..0441f4483 100644
--- a/pylib/anki/decks.py
+++ b/pylib/anki/decks.py
@@ -128,7 +128,7 @@ class DeckManager:
         return self.col.backend.new_deck_legacy(filtered)
 
     def deck_tree(self) -> pb.DeckTreeNode:
-        return self.col.backend.deck_tree(include_counts=False)
+        return self.col.backend.deck_tree(include_counts=False, top_deck_id=0)
 
     @classmethod
     def find_deck_in_tree(
diff --git a/pylib/anki/latex.py b/pylib/anki/latex.py
index 23013073d..ba6aaff21 100644
--- a/pylib/anki/latex.py
+++ b/pylib/anki/latex.py
@@ -6,13 +6,14 @@ from __future__ import annotations
 import html
 import os
 import re
+from dataclasses import dataclass
 from typing import Any, List, Optional, Tuple
 
 import anki
 from anki import hooks
 from anki.lang import _
 from anki.models import NoteType
-from anki.rsbackend import ExtractedLatex
+from anki.rsbackend import pb
 from anki.template import TemplateRenderContext, TemplateRenderOutput
 from anki.utils import call, isMac, namedtmp, tmpdir
 
@@ -33,6 +34,28 @@ if isMac:
     os.environ["PATH"] += ":/usr/texbin:/Library/TeX/texbin"
 
 
+@dataclass
+class ExtractedLatex:
+    filename: str
+    latex_body: str
+
+
+@dataclass
+class ExtractedLatexOutput:
+    html: str
+    latex: List[ExtractedLatex]
+
+    @staticmethod
+    def from_proto(proto: pb.ExtractLatexOut) -> ExtractedLatexOutput:
+        return ExtractedLatexOutput(
+            html=proto.text,
+            latex=[
+                ExtractedLatex(filename=l.filename, latex_body=l.latex_body)
+                for l in proto.latex
+            ],
+        )
+
+
 def on_card_did_render(
     output: TemplateRenderOutput, ctx: TemplateRenderContext
 ) -> None:
@@ -63,7 +86,8 @@ def render_latex_returning_errors(
     header = model["latexPre"]
     footer = model["latexPost"]
 
-    out = col.backend.extract_latex(html, svg, expand_clozes)
+    proto = col.backend.extract_latex(html, svg, expand_clozes)
+    out = ExtractedLatexOutput.from_proto(proto)
     errors = []
     html = out.html
 
diff --git a/pylib/anki/media.py b/pylib/anki/media.py
index ff5f7ecd7..da6fcc934 100644
--- a/pylib/anki/media.py
+++ b/pylib/anki/media.py
@@ -15,7 +15,7 @@ from typing import Any, Callable, List, Optional, Tuple
 import anki
 from anki.consts import *
 from anki.latex import render_latex, render_latex_returning_errors
-from anki.rsbackend import MediaCheckOutput
+from anki.rsbackend import pb
 from anki.utils import intTime
 
 
@@ -170,7 +170,7 @@ class MediaManager:
     # Checking media
     ##########################################################################
 
-    def check(self) -> MediaCheckOutput:
+    def check(self) -> pb.CheckMediaOut:
         output = self.col.backend.check_media()
         # files may have been renamed on disk, so an undo at this point could
         # break file references
diff --git a/pylib/anki/rsbackend.py b/pylib/anki/rsbackend.py
index abdb6532a..cf3c28b1c 100644
--- a/pylib/anki/rsbackend.py
+++ b/pylib/anki/rsbackend.py
@@ -151,39 +151,11 @@ def proto_exception_to_native(err: pb.BackendError) -> Exception:
         return StringError(err.localized)
 
 
-def av_tag_to_native(tag: pb.AVTag) -> AVTag:
-    val = tag.WhichOneof("value")
-    if val == "sound_or_video":
-        return SoundOrVideoTag(filename=tag.sound_or_video)
-    else:
-        return TTSTag(
-            field_text=tag.tts.field_text,
-            lang=tag.tts.lang,
-            voices=list(tag.tts.voices),
-            other_args=list(tag.tts.other_args),
-            speed=tag.tts.speed,
-        )
-
-
 MediaSyncProgress = pb.MediaSyncProgress
 
-MediaCheckOutput = pb.MediaCheckOut
-
 FormatTimeSpanContext = pb.FormatTimeSpanIn.Context
 
 
-@dataclass
-class ExtractedLatex:
-    filename: str
-    latex_body: str
-
-
-@dataclass
-class ExtractedLatexOutput:
-    html: str
-    latex: List[ExtractedLatex]
-
-
 class ProgressKind(enum.Enum):
     MediaSync = 0
     MediaCheck = 1
@@ -267,52 +239,6 @@ class RustBackend:
             release_gil=True,
         )
 
-    def sched_timing_today(self,) -> SchedTimingToday:
-        return self._run_command(
-            pb.BackendInput(sched_timing_today=pb.Empty())
-        ).sched_timing_today
-
-    def local_minutes_west(self, stamp: int) -> int:
-        return self._run_command(
-            pb.BackendInput(local_minutes_west=stamp)
-        ).local_minutes_west
-
-    def strip_av_tags(self, text: str) -> str:
-        return self._run_command(pb.BackendInput(strip_av_tags=text)).strip_av_tags
-
-    def extract_av_tags(
-        self, text: str, question_side: bool
-    ) -> Tuple[str, List[AVTag]]:
-        out = self._run_command(
-            pb.BackendInput(
-                extract_av_tags=pb.ExtractAVTagsIn(
-                    text=text, question_side=question_side
-                )
-            )
-        ).extract_av_tags
-        native_tags = list(map(av_tag_to_native, out.av_tags))
-
-        return out.text, native_tags
-
-    def extract_latex(
-        self, text: str, svg: bool, expand_clozes: bool
-    ) -> ExtractedLatexOutput:
-        out = self._run_command(
-            pb.BackendInput(
-                extract_latex=pb.ExtractLatexIn(
-                    text=text, svg=svg, expand_clozes=expand_clozes
-                )
-            )
-        ).extract_latex
-
-        return ExtractedLatexOutput(
-            html=out.text,
-            latex=[
-                ExtractedLatex(filename=l.filename, latex_body=l.latex_body)
-                for l in out.latex
-            ],
-        )
-
     def add_file_to_media_folder(self, desired_name: str, data: bytes) -> str:
         return self._run_command(
             pb.BackendInput(
@@ -326,11 +252,6 @@ class RustBackend:
             release_gil=True,
         )
 
-    def check_media(self) -> MediaCheckOutput:
-        return self._run_command(
-            pb.BackendInput(check_media=pb.Empty()), release_gil=True,
-        ).check_media
-
     def trash_media_files(self, fnames: List[str]) -> None:
         self._run_command(
             pb.BackendInput(trash_media_files=pb.TrashMediaFilesIn(fnames=fnames))
@@ -396,32 +317,6 @@ class RustBackend:
     def _db_command(self, input: Dict[str, Any]) -> Any:
         return orjson.loads(self._backend.db_command(orjson.dumps(input)))
 
-    def search_cards(
-        self, search: str, order: Union[bool, str, int], reverse: bool = False
-    ) -> Sequence[int]:
-        if isinstance(order, str):
-            mode = pb.SortOrder(custom=order)
-        elif order is True:
-            mode = pb.SortOrder(from_config=pb.Empty())
-        elif order is False:
-            mode = pb.SortOrder(none=pb.Empty())
-        else:
-            # sadly we can't use the protobuf type in a Union, so we
-            # have to accept an int and convert it
-            kind = BuiltinSortKind.Value(BuiltinSortKind.Name(order))
-            mode = pb.SortOrder(
-                builtin=pb.BuiltinSearchOrder(kind=kind, reverse=reverse)
-            )
-
-        return self._run_command(
-            pb.BackendInput(search_cards=pb.SearchCardsIn(search=search, order=mode))
-        ).search_cards.card_ids
-
-    def search_notes(self, search: str) -> Sequence[int]:
-        return self._run_command(
-            pb.BackendInput(search_notes=pb.SearchNotesIn(search=search))
-        ).search_notes.note_ids
-
     def get_card(self, cid: int) -> Optional[pb.Card]:
         output = self._run_command(pb.BackendInput(get_card=cid)).get_card
         if output.HasField("card"):
@@ -667,15 +562,6 @@ class RustBackend:
     def remove_deck(self, did: int) -> None:
         self._run_command(pb.BackendInput(remove_deck=did))
 
-    def deck_tree(self, include_counts: bool, top_deck_id: int = 0) -> DeckTreeNode:
-        return self._run_command(
-            pb.BackendInput(
-                deck_tree=pb.DeckTreeIn(
-                    include_counts=include_counts, top_deck_id=top_deck_id
-                )
-            )
-        ).deck_tree
-
     def check_database(self) -> List[str]:
         return list(
             self._run_command(
@@ -797,6 +683,62 @@ class RustBackend:
         output.ParseFromString(self._run_command2(2, input))
         return output
 
+    def sched_timing_today(self) -> pb.SchedTimingTodayOut:
+        input = pb.Empty()
+        output = pb.SchedTimingTodayOut()
+        output.ParseFromString(self._run_command2(3, input))
+        return output
+
+    def deck_tree(self, include_counts: bool, top_deck_id: int) -> pb.DeckTreeNode:
+        input = pb.DeckTreeIn(include_counts=include_counts, top_deck_id=top_deck_id)
+        output = pb.DeckTreeNode()
+        output.ParseFromString(self._run_command2(4, input))
+        return output
+
+    def search_cards(self, search: str, order: pb.SortOrder) -> Sequence[int]:
+        input = pb.SearchCardsIn(search=search, order=order)
+        output = pb.SearchCardsOut()
+        output.ParseFromString(self._run_command2(5, input))
+        return output.card_ids
+
+    def search_notes(self, search: str) -> Sequence[int]:
+        input = pb.SearchNotesIn(search=search)
+        output = pb.SearchNotesOut()
+        output.ParseFromString(self._run_command2(6, input))
+        return output.note_ids
+
+    def check_media(self) -> pb.CheckMediaOut:
+        input = pb.Empty()
+        output = pb.CheckMediaOut()
+        output.ParseFromString(self._run_command2(7, input))
+        return output
+
+    def local_minutes_west(self, val: int) -> int:
+        input = pb.Int64(val=val)
+        output = pb.Int32()
+        output.ParseFromString(self._run_command2(8, input))
+        return output.val
+
+    def strip_av_tags(self, val: str) -> str:
+        input = pb.String(val=val)
+        output = pb.String()
+        output.ParseFromString(self._run_command2(9, input))
+        return output.val
+
+    def extract_a_v_tags(self, text: str, question_side: bool) -> pb.ExtractAVTagsOut:
+        input = pb.ExtractAVTagsIn(text=text, question_side=question_side)
+        output = pb.ExtractAVTagsOut()
+        output.ParseFromString(self._run_command2(10, input))
+        return output
+
+    def extract_latex(
+        self, text: str, svg: bool, expand_clozes: bool
+    ) -> pb.ExtractLatexOut:
+        input = pb.ExtractLatexIn(text=text, svg=svg, expand_clozes=expand_clozes)
+        output = pb.ExtractLatexOut()
+        output.ParseFromString(self._run_command2(11, input))
+        return output
+
     # @@AUTOGEN@@
 
 
diff --git a/pylib/anki/template.py b/pylib/anki/template.py
index bbae9a35b..6c4aafbf2 100644
--- a/pylib/anki/template.py
+++ b/pylib/anki/template.py
@@ -38,7 +38,7 @@ from anki.decks import DeckManager
 from anki.models import NoteType
 from anki.notes import Note
 from anki.rsbackend import pb, to_json_bytes
-from anki.sound import AVTag
+from anki.sound import AVTag, SoundOrVideoTag, TTSTag
 
 CARD_BLANK_HELP = (
     "https://anki.tenderapp.com/kb/card-appearance/the-front-of-this-card-is-blank"
@@ -86,6 +86,24 @@ class PartiallyRenderedCard:
         return results
 
 
+def av_tag_to_native(tag: pb.AVTag) -> AVTag:
+    val = tag.WhichOneof("value")
+    if val == "sound_or_video":
+        return SoundOrVideoTag(filename=tag.sound_or_video)
+    else:
+        return TTSTag(
+            field_text=tag.tts.field_text,
+            lang=tag.tts.lang,
+            voices=list(tag.tts.voices),
+            other_args=list(tag.tts.other_args),
+            speed=tag.tts.speed,
+        )
+
+
+def av_tags_to_native(tags: Sequence[pb.AVTag]) -> List[AVTag]:
+    return list(map(av_tag_to_native, tags))
+
+
 class TemplateRenderContext:
     """Holds information for the duration of one card render.
 
@@ -197,16 +215,16 @@ class TemplateRenderContext:
             )
 
         qtext = apply_custom_filters(partial.qnodes, self, front_side=None)
-        qtext, q_avtags = self.col().backend.extract_av_tags(qtext, True)
+        qout = self.col().backend.extract_a_v_tags(qtext, True)
 
         atext = apply_custom_filters(partial.anodes, self, front_side=qtext)
-        atext, a_avtags = self.col().backend.extract_av_tags(atext, False)
+        aout = self.col().backend.extract_a_v_tags(atext, False)
 
         output = TemplateRenderOutput(
-            question_text=qtext,
-            answer_text=atext,
-            question_av_tags=q_avtags,
-            answer_av_tags=a_avtags,
+            question_text=qout.text,
+            answer_text=aout.text,
+            question_av_tags=av_tags_to_native(qout.av_tags),
+            answer_av_tags=av_tags_to_native(aout.av_tags),
             css=self.note_type()["css"],
         )
 
diff --git a/pylib/tools/genbackend.py b/pylib/tools/genbackend.py
index 8dbdd5702..2224dc388 100755
--- a/pylib/tools/genbackend.py
+++ b/pylib/tools/genbackend.py
@@ -33,7 +33,7 @@ LABEL_REPEATED = 3
 def python_type(field):
     type = python_type_inner(field)
     if field.label == LABEL_REPEATED:
-        type = f"List[{type}]"
+        type = f"Sequence[{type}]"
     return type
 
 
diff --git a/qt/aqt/mediacheck.py b/qt/aqt/mediacheck.py
index 2d1fdc1d5..4de188e9e 100644
--- a/qt/aqt/mediacheck.py
+++ b/qt/aqt/mediacheck.py
@@ -10,7 +10,7 @@ from typing import Iterable, List, Optional, Sequence, TypeVar
 
 import aqt
 from anki import hooks
-from anki.rsbackend import TR, Interrupted, MediaCheckOutput, Progress, ProgressKind
+from anki.rsbackend import TR, Interrupted, Progress, ProgressKind, pb
 from aqt.qt import *
 from aqt.utils import askUser, restoreGeom, saveGeom, showText, tooltip, tr
 
@@ -52,7 +52,7 @@ class MediaChecker:
         self.mw.taskman.run_on_main(lambda: self.mw.progress.update(progress.val))
         return True
 
-    def _check(self) -> MediaCheckOutput:
+    def _check(self) -> pb.CheckMediaOut:
         "Run the check on a background thread."
         return self.mw.col.media.check()
 
@@ -65,7 +65,7 @@ class MediaChecker:
         if isinstance(exc, Interrupted):
             return
 
-        output: MediaCheckOutput = future.result()
+        output: pb.CheckMediaOut = future.result()
         report = output.report
 
         # show report and offer to delete
diff --git a/rslib/src/backend/mod.rs b/rslib/src/backend/mod.rs
index 4b3293d05..9273d1320 100644
--- a/rslib/src/backend/mod.rs
+++ b/rslib/src/backend/mod.rs
@@ -175,6 +175,141 @@ impl BackendService for Backend {
                 .map(Into::into)
         })
     }
+
+    fn sched_timing_today(&mut self, _input: pb::Empty) -> Result<pb::SchedTimingTodayOut> {
+        self.with_col(|col| col.timing_today().map(Into::into))
+    }
+
+    fn deck_tree(&mut self, input: pb::DeckTreeIn) -> Result<pb::DeckTreeNode> {
+        let lim = if input.top_deck_id > 0 {
+            Some(DeckID(input.top_deck_id))
+        } else {
+            None
+        };
+        self.with_col(|col| col.deck_tree(input.include_counts, lim))
+    }
+
+    fn check_media(&mut self, _input: pb::Empty) -> Result<pb::CheckMediaOut> {
+        let callback =
+            |progress: usize| self.fire_progress_callback(Progress::MediaCheck(progress as u32));
+
+        self.with_col(|col| {
+            let mgr = MediaManager::new(&col.media_folder, &col.media_db)?;
+            col.transact(None, |ctx| {
+                let mut checker = MediaChecker::new(ctx, &mgr, callback);
+                let mut output = checker.check()?;
+
+                let report = checker.summarize_output(&mut output);
+
+                Ok(pb::CheckMediaOut {
+                    unused: output.unused,
+                    missing: output.missing,
+                    report,
+                    have_trash: output.trash_count > 0,
+                })
+            })
+        })
+    }
+
+    fn search_cards(&mut self, input: pb::SearchCardsIn) -> Result<pb::SearchCardsOut> {
+        self.with_col(|col| {
+            let order = if let Some(order) = input.order {
+                use pb::sort_order::Value as V;
+                match order.value {
+                    Some(V::None(_)) => SortMode::NoOrder,
+                    Some(V::Custom(s)) => SortMode::Custom(s),
+                    Some(V::FromConfig(_)) => SortMode::FromConfig,
+                    Some(V::Builtin(b)) => SortMode::Builtin {
+                        kind: sort_kind_from_pb(b.kind),
+                        reverse: b.reverse,
+                    },
+                    None => SortMode::FromConfig,
+                }
+            } else {
+                SortMode::FromConfig
+            };
+            let cids = col.search_cards(&input.search, order)?;
+            Ok(pb::SearchCardsOut {
+                card_ids: cids.into_iter().map(|v| v.0).collect(),
+            })
+        })
+    }
+
+    fn search_notes(&mut self, input: pb::SearchNotesIn) -> Result<pb::SearchNotesOut> {
+        self.with_col(|col| {
+            let nids = col.search_notes(&input.search)?;
+            Ok(pb::SearchNotesOut {
+                note_ids: nids.into_iter().map(|v| v.0).collect(),
+            })
+        })
+    }
+
+    fn local_minutes_west(&mut self, input: pb::Int64) -> BackendResult<pb::Int32> {
+        Ok(pb::Int32 {
+            val: local_minutes_west_for_stamp(input.val),
+        })
+    }
+
+    fn strip_av_tags(&mut self, input: pb::String) -> BackendResult<pb::String> {
+        Ok(pb::String {
+            val: strip_av_tags(&input.val).into(),
+        })
+    }
+
+    fn extract_av_tags(
+        &mut self,
+        input: pb::ExtractAvTagsIn,
+    ) -> BackendResult<pb::ExtractAvTagsOut> {
+        let (text, tags) = extract_av_tags(&input.text, input.question_side);
+        let pt_tags = tags
+            .into_iter()
+            .map(|avtag| match avtag {
+                AVTag::SoundOrVideo(file) => pb::AvTag {
+                    value: Some(pb::av_tag::Value::SoundOrVideo(file)),
+                },
+                AVTag::TextToSpeech {
+                    field_text,
+                    lang,
+                    voices,
+                    other_args,
+                    speed,
+                } => pb::AvTag {
+                    value: Some(pb::av_tag::Value::Tts(pb::TtsTag {
+                        field_text,
+                        lang,
+                        voices,
+                        other_args,
+                        speed,
+                    })),
+                },
+            })
+            .collect();
+
+        Ok(pb::ExtractAvTagsOut {
+            text: text.into(),
+            av_tags: pt_tags,
+        })
+    }
+
+    fn extract_latex(&mut self, input: pb::ExtractLatexIn) -> BackendResult<pb::ExtractLatexOut> {
+        let func = if input.expand_clozes {
+            extract_latex_expanding_clozes
+        } else {
+            extract_latex
+        };
+        let (text, extracted) = func(&input.text, input.svg);
+
+        Ok(pb::ExtractLatexOut {
+            text,
+            latex: extracted
+                .into_iter()
+                .map(|e: ExtractedLatex| pb::ExtractedLatex {
+                    filename: e.fname,
+                    latex_body: e.latex,
+                })
+                .collect(),
+        })
+    }
 }
 
 impl Backend {
@@ -267,20 +402,11 @@ impl Backend {
     ) -> Result<pb::backend_output::Value> {
         use pb::backend_output::Value as OValue;
         Ok(match ival {
-            Value::SchedTimingToday(_) => OValue::SchedTimingToday(self.sched_timing_today()?),
-            Value::DeckTree(input) => OValue::DeckTree(self.deck_tree(input)?),
-            Value::LocalMinutesWest(stamp) => {
-                OValue::LocalMinutesWest(local_minutes_west_for_stamp(stamp))
-            }
-            Value::StripAvTags(text) => OValue::StripAvTags(strip_av_tags(&text).into()),
-            Value::ExtractAvTags(input) => OValue::ExtractAvTags(self.extract_av_tags(input)),
-            Value::ExtractLatex(input) => OValue::ExtractLatex(self.extract_latex(input)),
             Value::AddMediaFile(input) => OValue::AddMediaFile(self.add_media_file(input)?),
             Value::SyncMedia(input) => {
                 self.sync_media(input)?;
                 OValue::SyncMedia(Empty {})
             }
-            Value::CheckMedia(_) => OValue::CheckMedia(self.check_media()?),
             Value::TrashMediaFiles(input) => {
                 self.remove_media_files(&input.fnames)?;
                 OValue::TrashMediaFiles(Empty {})
@@ -313,8 +439,6 @@ impl Backend {
                 self.close_collection(input.downgrade_to_schema11)?;
                 OValue::CloseCollection(Empty {})
             }
-            Value::SearchCards(input) => OValue::SearchCards(self.search_cards(input)?),
-            Value::SearchNotes(input) => OValue::SearchNotes(self.search_notes(input)?),
             Value::GetCard(cid) => OValue::GetCard(self.get_card(cid)?),
             Value::UpdateCard(card) => {
                 self.update_card(card)?;
@@ -422,12 +546,6 @@ impl Backend {
                 self.set_preferences(prefs)?;
                 pb::Empty {}
             }),
-            Value::RenderExistingCard(input) => {
-                OValue::RenderExistingCard(self.render_existing_card(input)?)
-            }
-            Value::RenderUncommittedCard(input) => {
-                OValue::RenderUncommittedCard(self.render_uncommitted_card(input)?)
-            }
             Value::ClozeNumbersInNote(note) => {
                 OValue::ClozeNumbersInNote(self.cloze_numbers_in_note(note))
             }
@@ -497,71 +615,6 @@ impl Backend {
         self.progress_callback = progress_cb;
     }
 
-    fn sched_timing_today(&self) -> Result<pb::SchedTimingTodayOut> {
-        self.with_col(|col| col.timing_today().map(Into::into))
-    }
-
-    fn deck_tree(&self, input: pb::DeckTreeIn) -> Result<pb::DeckTreeNode> {
-        let lim = if input.top_deck_id > 0 {
-            Some(DeckID(input.top_deck_id))
-        } else {
-            None
-        };
-        self.with_col(|col| col.deck_tree(input.include_counts, lim))
-    }
-
-    fn extract_av_tags(&self, input: pb::ExtractAvTagsIn) -> pb::ExtractAvTagsOut {
-        let (text, tags) = extract_av_tags(&input.text, input.question_side);
-        let pt_tags = tags
-            .into_iter()
-            .map(|avtag| match avtag {
-                AVTag::SoundOrVideo(file) => pb::AvTag {
-                    value: Some(pb::av_tag::Value::SoundOrVideo(file)),
-                },
-                AVTag::TextToSpeech {
-                    field_text,
-                    lang,
-                    voices,
-                    other_args,
-                    speed,
-                } => pb::AvTag {
-                    value: Some(pb::av_tag::Value::Tts(pb::TtsTag {
-                        field_text,
-                        lang,
-                        voices,
-                        other_args,
-                        speed,
-                    })),
-                },
-            })
-            .collect();
-
-        pb::ExtractAvTagsOut {
-            text: text.into(),
-            av_tags: pt_tags,
-        }
-    }
-
-    fn extract_latex(&self, input: pb::ExtractLatexIn) -> pb::ExtractLatexOut {
-        let func = if input.expand_clozes {
-            extract_latex_expanding_clozes
-        } else {
-            extract_latex
-        };
-        let (text, extracted) = func(&input.text, input.svg);
-
-        pb::ExtractLatexOut {
-            text,
-            latex: extracted
-                .into_iter()
-                .map(|e: ExtractedLatex| pb::ExtractedLatex {
-                    filename: e.fname,
-                    latex_body: e.latex,
-                })
-                .collect(),
-        }
-    }
-
     fn add_media_file(&mut self, input: pb::AddMediaFileIn) -> Result<String> {
         self.with_col(|col| {
             let mgr = MediaManager::new(&col.media_folder, &col.media_db)?;
@@ -626,28 +679,6 @@ impl Backend {
         }
     }
 
-    fn check_media(&self) -> Result<pb::MediaCheckOut> {
-        let callback =
-            |progress: usize| self.fire_progress_callback(Progress::MediaCheck(progress as u32));
-
-        self.with_col(|col| {
-            let mgr = MediaManager::new(&col.media_folder, &col.media_db)?;
-            col.transact(None, |ctx| {
-                let mut checker = MediaChecker::new(ctx, &mgr, callback);
-                let mut output = checker.check()?;
-
-                let report = checker.summarize_output(&mut output);
-
-                Ok(pb::MediaCheckOut {
-                    unused: output.unused,
-                    missing: output.missing,
-                    report,
-                    have_trash: output.trash_count > 0,
-                })
-            })
-        })
-    }
-
     fn remove_media_files(&self, fnames: &[String]) -> Result<()> {
         self.with_col(|col| {
             let mgr = MediaManager::new(&col.media_folder, &col.media_db)?;
@@ -720,39 +751,6 @@ impl Backend {
         self.with_col(|col| db_command_bytes(&col.storage, input))
     }
 
-    fn search_cards(&self, input: pb::SearchCardsIn) -> Result<pb::SearchCardsOut> {
-        self.with_col(|col| {
-            let order = if let Some(order) = input.order {
-                use pb::sort_order::Value as V;
-                match order.value {
-                    Some(V::None(_)) => SortMode::NoOrder,
-                    Some(V::Custom(s)) => SortMode::Custom(s),
-                    Some(V::FromConfig(_)) => SortMode::FromConfig,
-                    Some(V::Builtin(b)) => SortMode::Builtin {
-                        kind: sort_kind_from_pb(b.kind),
-                        reverse: b.reverse,
-                    },
-                    None => SortMode::FromConfig,
-                }
-            } else {
-                SortMode::FromConfig
-            };
-            let cids = col.search_cards(&input.search, order)?;
-            Ok(pb::SearchCardsOut {
-                card_ids: cids.into_iter().map(|v| v.0).collect(),
-            })
-        })
-    }
-
-    fn search_notes(&self, input: pb::SearchNotesIn) -> Result<pb::SearchNotesOut> {
-        self.with_col(|col| {
-            let nids = col.search_notes(&input.search)?;
-            Ok(pb::SearchNotesOut {
-                note_ids: nids.into_iter().map(|v| v.0).collect(),
-            })
-        })
-    }
-
     fn get_card(&self, cid: i64) -> Result<pb::GetCardOut> {
         let card = self.with_col(|col| col.storage.get_card(CardID(cid)))?;
         Ok(pb::GetCardOut {