diff --git a/server/scripts/strict-baseline.json b/server/scripts/strict-baseline.json
index 1d0fa82dc..2977cda47 100644
--- a/server/scripts/strict-baseline.json
+++ b/server/scripts/strict-baseline.json
@@ -101,6 +101,5 @@
   "src/nest/roadtrip/roadtrip-router.service.ts": 12,
   "src/nest/settings/settings.service.ts": 1,
   "src/nest/storage/drivers/s3.driver.ts": 1,
-  "src/nest/trips/trips.controller.ts": 1,
   "src/nest/trips/trips.service.ts": 1
 }
diff --git a/server/src/nest/assistant/cards/booking/booking-answer.ts b/server/src/nest/assistant/cards/booking/booking-answer.ts
index f4ed23a71..dc924eaf3 100644
--- a/server/src/nest/assistant/cards/booking/booking-answer.ts
+++ b/server/src/nest/assistant/cards/booking/booking-answer.ts
@@ -16,7 +16,11 @@ const SHOWN = 8;
 
 function listCard(input: AnswerInput, rows: Row[], toRow: (raw: Row) => BookingRow): TrekCard | null {
   const scope = scopeOfCard(input.card);
-  return bookingCard('none', rows.slice(0, SHOWN).map((raw) => bookingItemOf(toRow(raw), scope)), rows.length);
+  return bookingCard(
+    'none',
+    rows.slice(0, SHOWN).map((raw) => bookingItemOf(toRow(raw), scope)),
+    rows.length,
+  );
 }
 
 /** A stay listed once: the list joins each booking that links it, so one stay can come twice. */
diff --git a/server/src/nest/assistant/cards/booking/index.ts b/server/src/nest/assistant/cards/booking/index.ts
index 893bb4346..f8c48c006 100644
--- a/server/src/nest/assistant/cards/booking/index.ts
+++ b/server/src/nest/assistant/cards/booking/index.ts
@@ -1,5 +1,5 @@
-import { IMPORT_BOOKING_TOOL } from '../../assistant-tools.constants';
 import type { TripCard } from '../../assistant-context';
+import { IMPORT_BOOKING_TOOL } from '../../assistant-tools.constants';
 import type { DomainCards, PreviewContext, ToolArgs } from '../card-types';
 import { argId, clipped, idIn } from '../card-values';
 import { BOOKING_ANSWERS } from './booking-answer';
diff --git a/server/src/nest/assistant/cards/budget/budget-describe.ts b/server/src/nest/assistant/cards/budget/budget-describe.ts
index 3f07e9066..12a178727 100644
--- a/server/src/nest/assistant/cards/budget/budget-describe.ts
+++ b/server/src/nest/assistant/cards/budget/budget-describe.ts
@@ -28,7 +28,10 @@ function expenseName(ctx: PreviewContext, args: ToolArgs): string {
 
 /** Who shares a stored expense, by name. */
 function sharedBy(ctx: PreviewContext, row: Row | undefined): string {
-  return memberNames(ctx, rowsOf(row?.members).map((member) => member.user_id));
+  return memberNames(
+    ctx,
+    rowsOf(row?.members).map((member) => member.user_id),
+  );
 }
 
 /** "Ana → Ben", from the two people of a payment. */
diff --git a/server/src/nest/assistant/cards/budget/budget-values.ts b/server/src/nest/assistant/cards/budget/budget-values.ts
index f910d484c..4f68da615 100644
--- a/server/src/nest/assistant/cards/budget/budget-values.ts
+++ b/server/src/nest/assistant/cards/budget/budget-values.ts
@@ -117,7 +117,11 @@ export function splitOf(
   max: number,
 ): Pick<CardExpense, 'split' | 'shares' | 'moreShares'> {
   if (members.length === 0) return { split: 'none', shares: [], moreShares: 0 };
-  const equal = splitEqualShares(toMinor(total), members.map((member) => ({ user_id: member.id })), itemId);
+  const equal = splitEqualShares(
+    toMinor(total),
+    members.map((member) => ({ user_id: member.id })),
+    itemId,
+  );
   const shares = members.map((member) => ({
     person: personFrom(card, member.id, member.name, member.avatarUrl),
     amount: member.amount ?? (equal[member.id] ?? 0) / 100,
diff --git a/server/src/nest/assistant/cards/collection/index.ts b/server/src/nest/assistant/cards/collection/index.ts
index 5353d0198..b3f6a25ae 100644
--- a/server/src/nest/assistant/cards/collection/index.ts
+++ b/server/src/nest/assistant/cards/collection/index.ts
@@ -73,12 +73,15 @@ export const COLLECTION_CARDS: DomainCards = {
     list_collections: { answer: listsAnswer },
     find_place_in_collections: { answer: membershipAnswer },
     ...WRITE_CARDS,
-    create_collection: { ...WRITE_CARDS.create_collection, undo: DELETE_CREATED_LIST },
+    create_collection: { ...writeCards('create_collection', WRITES.create_collection), undo: DELETE_CREATED_LIST },
     save_place_to_collection: {
-      ...WRITE_CARDS.save_place_to_collection,
+      ...writeCards('save_place_to_collection', WRITES.save_place_to_collection),
       undo: DELETE_SAVED_PLACE,
       argPolicy: NO_IMAGE,
     },
-    update_collection_place: { ...WRITE_CARDS.update_collection_place, argPolicy: NO_IMAGE },
+    update_collection_place: {
+      ...writeCards('update_collection_place', WRITES.update_collection_place),
+      argPolicy: NO_IMAGE,
+    },
   },
 };
diff --git a/server/src/nest/assistant/cards/packing/packing-changes.ts b/server/src/nest/assistant/cards/packing/packing-changes.ts
index 8a633ef73..d770290f9 100644
--- a/server/src/nest/assistant/cards/packing/packing-changes.ts
+++ b/server/src/nest/assistant/cards/packing/packing-changes.ts
@@ -24,12 +24,7 @@ import {
   type ListItem,
   type PackingTier,
 } from './packing-rows';
-import {
-  resolvePackedState,
-  type PackingCardBag,
-  type PackingCardItem,
-  type PackingListCard,
-} from '@trek/shared';
+import { resolvePackedState, type PackingCardBag, type PackingCardItem, type PackingListCard } from '@trek/shared';
 
 /**
  * The card each packing change shows inside its change card, from the call's
@@ -330,37 +325,56 @@ export function packingAssigneesCard(ctx: PreviewContext, args: ToolArgs, loaded
   const before = rowsOf(recordOf(recordOf(loaded).assignees)[raw]).flatMap((row) => positiveId(row.user_id) ?? []);
   const inside = tripPacking(ctx.card).filter((item) => !item.placeholder && item.category === raw);
   const personal = inside.length > 0 && inside.every((item) => item.isPrivate);
-  return packingCard({ type: 'trip' }, 'category', [], [
-    {
-      key: { by: 'category', name, slot: slotOf(ctx.card, raw, personal) },
-      assignees: peopleOf(ctx.card, chosen, 6),
-      assigneesRemoved: peopleOf(ctx.card, before.filter((id) => !chosen.includes(id)), 6),
-      items: [],
-      count: inside.length,
-      packed: inside.filter((item) => item.checked).length,
-    },
-  ]);
+  return packingCard(
+    { type: 'trip' },
+    'category',
+    [],
+    [
+      {
+        key: { by: 'category', name, slot: slotOf(ctx.card, raw, personal) },
+        assignees: peopleOf(ctx.card, chosen, 6),
+        assigneesRemoved: peopleOf(
+          ctx.card,
+          before.filter((id) => !chosen.includes(id)),
+          6,
+        ),
+        items: [],
+        count: inside.length,
+        packed: inside.filter((item) => item.checked).length,
+      },
+    ],
+  );
 }
 
 /** A bag head on a card of its own: what a change to one bag shows. */
 function bagCard(card: TripCard, bag: PackingCardBag): PackingListCard {
   const inside = tripPacking(card).filter((item) => !item.placeholder && bag.id !== null && item.bagId === bag.id);
-  return packingCard({ type: 'trip' }, 'bag', [bag], [
-    {
-      key: { by: 'bag', bagKey: bag.key },
-      assignees: [],
-      assigneesRemoved: [],
-      items: [],
-      count: inside.length,
-      packed: inside.filter((item) => item.checked).length,
-    },
-  ]);
+  return packingCard(
+    { type: 'trip' },
+    'bag',
+    [bag],
+    [
+      {
+        key: { by: 'bag', bagKey: bag.key },
+        assignees: [],
+        assigneesRemoved: [],
+        items: [],
+        count: inside.length,
+        packed: inside.filter((item) => item.checked).length,
+      },
+    ],
+  );
 }
 
 /** The bag a call names (`bagId`), as the lookup read it. */
 function namedBag(card: TripCard, args: ToolArgs, loaded: unknown): PackingCardBag | null {
   const bagId = argId(args, 'bagId');
-  return bagId === null ? null : bagOf(card, rawBags(loaded).find((bag) => bag.id === bagId));
+  return bagId === null
+    ? null
+    : bagOf(
+        card,
+        rawBags(loaded).find((bag) => bag.id === bagId),
+      );
 }
 
 /** `create_packing_bag`: the new bag's head, in its colour (indigo without one) and with its limit. */
diff --git a/server/src/nest/assistant/cards/packing/packing-rows.ts b/server/src/nest/assistant/cards/packing/packing-rows.ts
index 935bf3ace..949b9928a 100644
--- a/server/src/nest/assistant/cards/packing/packing-rows.ts
+++ b/server/src/nest/assistant/cards/packing/packing-rows.ts
@@ -204,7 +204,11 @@ export function slotOf(card: TripCard | null, category: string | null, personal:
 
 /** The people of an assignee list (`[{ user_id }]`), as trip members. */
 export function assigneesOf(card: TripCard, raw: unknown): CardPerson[] {
-  return peopleOf(card, rowsOf(raw).flatMap((row) => positiveId(row.user_id) ?? []), 6);
+  return peopleOf(
+    card,
+    rowsOf(raw).flatMap((row) => positiveId(row.user_id) ?? []),
+    6,
+  );
 }
 
 /** One bag as `list_packing_bags` answers it. */
@@ -302,7 +306,11 @@ export function packingGroups(
   items: readonly ListItem[],
   options: GroupOptions,
 ): { groups: PackingCardGroup[]; moreGroups: number } {
-  const buckets = bucketsOf(card, items.filter((item) => !item.placeholder), options);
+  const buckets = bucketsOf(
+    card,
+    items.filter((item) => !item.placeholder),
+    options,
+  );
   let left = options.maxRows ?? MAX_PACKING_ROWS;
   const perGroup = options.fillSingleGroup && buckets.length === 1 ? left : ROWS_PER_GROUP;
   const groups = buckets.slice(0, MAX_CARD_GROUPS).map((bucket): PackingCardGroup => {
diff --git a/server/src/nest/assistant/cards/packing/todo-cards.ts b/server/src/nest/assistant/cards/packing/todo-cards.ts
index 4515a2cdf..5db1a97c0 100644
--- a/server/src/nest/assistant/cards/packing/todo-cards.ts
+++ b/server/src/nest/assistant/cards/packing/todo-cards.ts
@@ -170,7 +170,11 @@ function todoAssigneesCard(ctx: PreviewContext, args: ToolArgs, loaded: TodoAssi
       category,
       slot: todoSlot(ctx.card, args.categoryName),
       assignees: peopleOf(ctx.card, chosen, 6),
-      assigneesRemoved: peopleOf(ctx.card, before.filter((id) => !chosen.includes(id)), 6),
+      assigneesRemoved: peopleOf(
+        ctx.card,
+        before.filter((id) => !chosen.includes(id)),
+        6,
+      ),
       items: [],
       count: inList.length,
       open: inList.filter((todo) => !todo.checked).length,
diff --git a/server/src/nest/assistant/cards/roadtrip/roadtrip-describe.ts b/server/src/nest/assistant/cards/roadtrip/roadtrip-describe.ts
index bacb13fbc..1d180536a 100644
--- a/server/src/nest/assistant/cards/roadtrip/roadtrip-describe.ts
+++ b/server/src/nest/assistant/cards/roadtrip/roadtrip-describe.ts
@@ -113,7 +113,7 @@ export function describeSettings(ctx: PreviewContext, args: Args, loaded: SavedS
       after: settingText(change.after),
     });
   }
-  return { subject: clip(ctx.card.title), rows, dayId: null, placeIds: [] };
+  return { subject: clip(ctx.card.title), rows, dayId: null, placeIds: [], tool: 'update_roadtrip_settings' };
 }
 
 export function describeDayEnd(ctx: PreviewContext, args: Args): Described {
@@ -129,7 +129,9 @@ export function describeImportRoute(ctx: PreviewContext, args: Args): Described
   const names = Array.isArray(args.stops)
     ? args.stops.map((stop: unknown) => text(recordOf(stop).name)).filter((name) => name !== '')
     : [];
-  const rows = dayRows(ctx, dayId).add('quantity', String(names.length)).add('route', clip(routeText(names)));
+  const rows = dayRows(ctx, dayId)
+    .add('quantity', String(names.length))
+    .add('route', clip(routeText(names)));
   const ends = names.length > 0 ? routeText([names[0] ?? '', names[names.length - 1] ?? '']) : '';
   return { subject: ends, rows, dayId, placeIds: [] };
 }
diff --git a/server/src/nest/assistant/cards/tour/tour-change.cards.ts b/server/src/nest/assistant/cards/tour/tour-change.cards.ts
index d4611758c..e078d3b8f 100644
--- a/server/src/nest/assistant/cards/tour/tour-change.cards.ts
+++ b/server/src/nest/assistant/cards/tour/tour-change.cards.ts
@@ -1,6 +1,5 @@
 import type { CardReader, PreviewContext, ToolArgs } from '../card-types';
 import { canonicalJson, clipped, finite, recordOf, type Row } from '../card-values';
-import { hikeCard } from './tour-route.cards';
 import {
   argText,
   climbOf,
@@ -19,6 +18,7 @@ import {
   straightMetres,
   whole,
 } from './tour-card-values';
+import { hikeCard } from './tour-route.cards';
 import {
   hikingPreferencesOf,
   TOUR_ROUTE_LIMITS,
diff --git a/server/src/nest/assistant/cards/vacay/vacay-answer.ts b/server/src/nest/assistant/cards/vacay/vacay-answer.ts
index 0e97afb5a..b9e1a67a5 100644
--- a/server/src/nest/assistant/cards/vacay/vacay-answer.ts
+++ b/server/src/nest/assistant/cards/vacay/vacay-answer.ts
@@ -104,7 +104,11 @@ export const VACAY_ANSWER_CARDS = {
     const stats = statsOf(input.value);
     if (!stats || stats.length === 0) return null;
     const viewerId = input.card.viewerId;
-    const people = peopleOf(stats.map((row) => row.personId), knownPeople(null, [], stats), viewerId);
+    const people = peopleOf(
+      stats.map((row) => row.personId),
+      knownPeople(null, [], stats),
+      viewerId,
+    );
     const order = new Map(people.map((person, index) => [person.id, index]));
     const balances = keepKnown(stats, people)
       .sort((a, b) => (order.get(a.personId) ?? 0) - (order.get(b.personId) ?? 0))
diff --git a/server/src/nest/assistant/cards/vacay/vacay-change.ts b/server/src/nest/assistant/cards/vacay/vacay-change.ts
index ef587bc83..dbc612f2c 100644
--- a/server/src/nest/assistant/cards/vacay/vacay-change.ts
+++ b/server/src/nest/assistant/cards/vacay/vacay-change.ts
@@ -96,7 +96,10 @@ function toggleProposal(viewerId: number, args: ToolArgs, loaded: VacayLoaded, d
   const was = existing ? counted(existing.kind, existing.fraction) : 0;
   const will = outcome === 'remove' ? 0 : outcome === 'blocked' ? was : counted(kind, fraction);
   const year = Number(date.slice(0, 4));
-  const periodYear = periodOf(date, loaded.stats.find((row) => row.personId === personId && row.year === year));
+  const periodYear = periodOf(
+    date,
+    loaded.stats.find((row) => row.personId === personId && row.year === year),
+  );
   const counts = kind === 'vacation' && (outcome === 'add' || outcome === 'convert');
   return {
     date,
diff --git a/server/src/nest/assistant/cards/vacay/vacay-frame.ts b/server/src/nest/assistant/cards/vacay/vacay-frame.ts
index f7b0019b0..4256e0a0c 100644
--- a/server/src/nest/assistant/cards/vacay/vacay-frame.ts
+++ b/server/src/nest/assistant/cards/vacay/vacay-frame.ts
@@ -51,7 +51,9 @@ function tripDatesOf(card: TripCard): string[] {
 
 /** The dated days of the trip inside `months`, as many as a card holds. */
 export function tripDatesIn(card: TripCard, months: readonly CardMonth[]): string[] {
-  return tripDatesOf(card).filter((date) => inMonths(date, months)).slice(0, VACAY_CARD_MAX_DATES);
+  return tripDatesOf(card)
+    .filter((date) => inMonths(date, months))
+    .slice(0, VACAY_CARD_MAX_DATES);
 }
 
 /** The company holidays inside `months`, each date once. */
diff --git a/server/src/nest/roadtrip/roadtrip-planning.mcp.ts b/server/src/nest/roadtrip/roadtrip-planning.mcp.ts
index 11a1f25fb..eae894f20 100644
--- a/server/src/nest/roadtrip/roadtrip-planning.mcp.ts
+++ b/server/src/nest/roadtrip/roadtrip-planning.mcp.ts
@@ -130,7 +130,10 @@ export class RoadtripPlanningMcp {
       });
       const betweenStops = (alongKm: number): [string, string] | null => {
         if (anchors.length < 2) return null;
-        const index = insertIndexForAlong(anchors.map((anchor) => anchor.alongKm), alongKm);
+        const index = insertIndexForAlong(
+          anchors.map((anchor) => anchor.alongKm),
+          alongKm,
+        );
         return [anchors[index - 1].name, anchors[index].name];
       };
       const hits = new Map<
diff --git a/server/tests/e2e/assistant.e2e.test.ts b/server/tests/e2e/assistant.e2e.test.ts
index 4d0481cca..97152240d 100644
--- a/server/tests/e2e/assistant.e2e.test.ts
+++ b/server/tests/e2e/assistant.e2e.test.ts
@@ -1131,9 +1131,10 @@ describe('Trip assistant e2e', () => {
     const args = { question, options: ['Trattoria', 'Night market'] };
     provider.script = [callTools({ id: 'call_poll', name: 'create_collab_poll', args })];
     const turn = await post(`${t.base}/chat`, t.userId, { ...CTX, threadId: null, text: 'Ask the group' });
+    const toolCallId = ofType(turn.chunks, 'tool-approval-request')[0]?.toolCallId ?? '';
     const [change] = ofType(turn.chunks, 'data-trek-change');
     expect(change.data).toMatchObject({
-      toolCallId: 'call_poll',
+      toolCallId,
       verbKey: 'genericCreate',
       tool: 'create_collab_poll',
       domain: 'collab',
@@ -1148,7 +1149,7 @@ describe('Trip assistant e2e', () => {
     provider.script = [say('The poll is up.')];
     const decided = await post(`${t.base}/threads/${threadId}/decisions`, t.userId, {
       ...CTX,
-      decisions: [{ toolCallId: 'call_poll', approved: true }],
+      decisions: [{ toolCallId, approved: true }],
     });
     expect(decided.status).toBe(200);
     const poll = await findRow(orm, CollabPolls, { trip: t.tripId });
@@ -1156,7 +1157,7 @@ describe('Trip assistant e2e', () => {
     const [applied] = ofType(decided.chunks, 'data-trek-applied');
     expect(applied.data).toMatchObject({ entity: 'collab_poll', ids: [poll?.id] });
     expect(ofType(decided.chunks, 'data-trek-card')[0].data).toMatchObject({
-      toolCallId: 'call_poll',
+      toolCallId,
       card: { kind: 'collabPolls', polls: [{ pollId: poll?.id, change: 'create', question }] },
     });
     expect(broadcasts.broadcast).toHaveBeenCalledWith(t.tripId, 'collab:poll:created', expect.anything());
diff --git a/server/tests/unit/nest/assistant/cards/budget/budget-cards.test.ts b/server/tests/unit/nest/assistant/cards/budget/budget-cards.test.ts
index c3ea82634..6559b4598 100644
--- a/server/tests/unit/nest/assistant/cards/budget/budget-cards.test.ts
+++ b/server/tests/unit/nest/assistant/cards/budget/budget-cards.test.ts
@@ -222,7 +222,14 @@ describe('answer cards', () => {
   it('ASTCARD-BUD-004: an empty list, a broken answer and rows without a name or an amount show no card', () => {
     expect(answer('list_budget_items', { currency: 'EUR', total: 0, items: [] })).toBeNull();
     expect(answer('list_budget_items', 'not a list')).toBeNull();
-    expect(answer('list_budget_items', { items: [{ id: 1, total_price: 5 }, { id: 2, name: 'Tip' }] })).toBeNull();
+    expect(
+      answer('list_budget_items', {
+        items: [
+          { id: 1, total_price: 5 },
+          { id: 2, name: 'Tip' },
+        ],
+      }),
+    ).toBeNull();
     expect(answer('get_settlement_summary', { error: 'nope' })).toBeNull();
     expect(answer('get_budget_per_person', { summary: [] })).toBeNull();
     expect(answer('list_settlements', { settlements: [] })).toBeNull();
diff --git a/server/tests/unit/nest/assistant/cards/collab/collab-cards.test.ts b/server/tests/unit/nest/assistant/cards/collab/collab-cards.test.ts
index 51ccf10df..ad1d2dc8c 100644
--- a/server/tests/unit/nest/assistant/cards/collab/collab-cards.test.ts
+++ b/server/tests/unit/nest/assistant/cards/collab/collab-cards.test.ts
@@ -143,7 +143,14 @@ describe('the chat card of a read', () => {
     const row = message(4, {
       origin: 'assistant',
       reactions: [
-        { emoji: '❤️', count: 2, users: [{ user_id: 7, username: 'anna' }, { user_id: 8, username: 'jon' }] },
+        {
+          emoji: '❤️',
+          count: 2,
+          users: [
+            { user_id: 7, username: 'anna' },
+            { user_id: 8, username: 'jon' },
+          ],
+        },
         { emoji: '👍', count: 1, users: [{ user_id: 8, username: 'jon' }] },
       ],
       attachments: [
diff --git a/server/tests/unit/nest/assistant/cards/collection/collection-changes.test.ts b/server/tests/unit/nest/assistant/cards/collection/collection-changes.test.ts
index 2712632d7..bb08654f6 100644
--- a/server/tests/unit/nest/assistant/cards/collection/collection-changes.test.ts
+++ b/server/tests/unit/nest/assistant/cards/collection/collection-changes.test.ts
@@ -195,7 +195,12 @@ describe('collection change cards', () => {
     const deleted = preview('delete_collection', { collectionId: 12 }, { collection });
     expect(deleted).toMatchObject({ subject: 'Paris food', verbKey: 'genericRemove' });
     expect(listsOf(deleted.card).lists[0]).toMatchObject({ placeCount: 10, memberCount: 1, change: 'remove' });
-    const lists = { collections: [{ id: 12, name: 'A' }, { id: 13, name: 'B' }] };
+    const lists = {
+      collections: [
+        { id: 12, name: 'A' },
+        { id: 13, name: 'B' },
+      ],
+    };
     const order = preview('reorder_collections', { orderedIds: [13, 12] }, { lists });
     expect(order.subject).toBe('B, A');
     expect(listsOf(order.card).lists.map((row) => [row.name, row.change])).toEqual([
diff --git a/server/tests/unit/nest/assistant/cards/tour/tour-change.cards.test.ts b/server/tests/unit/nest/assistant/cards/tour/tour-change.cards.test.ts
index d5e1f711f..e9a3f1f4e 100644
--- a/server/tests/unit/nest/assistant/cards/tour/tour-change.cards.test.ts
+++ b/server/tests/unit/nest/assistant/cards/tour/tour-change.cards.test.ts
@@ -342,7 +342,17 @@ describe('the words and the way back of the other tour writes', () => {
     expect(unchangedSinceApplied('create_hike', created, onItsDay)).toBe(true);
     const twice = {
       places: { places: [hike] },
-      summary: { days: [{ id: 31, assignments: [{ id: 306, place_id: 64 }, { id: 305, place_id: 64 }] }] },
+      summary: {
+        days: [
+          {
+            id: 31,
+            assignments: [
+              { id: 306, place_id: 64 },
+              { id: 305, place_id: 64 },
+            ],
+          },
+        ],
+      },
     };
     expect(unchangedSinceApplied('create_hike', created, twice)).toBe(false);
     // A new way saved since (any route write stamps updated_at) keeps the tour, name and day unchanged or not.
diff --git a/server/tests/unit/nest/assistant/cards/tour/tour-route.cards.test.ts b/server/tests/unit/nest/assistant/cards/tour/tour-route.cards.test.ts
index 5aebe43c3..74e3e2683 100644
--- a/server/tests/unit/nest/assistant/cards/tour/tour-route.cards.test.ts
+++ b/server/tests/unit/nest/assistant/cards/tour/tour-route.cards.test.ts
@@ -13,13 +13,7 @@ import type { AnswerInput } from '../../../../../../src/nest/assistant/cards/car
 import { answerCardOf } from '../../../../../../src/nest/assistant/cards/registry';
 import { fitted, hardestStretches } from '../../../../../../src/nest/assistant/cards/tour/tour-card-values';
 import { sacStretches } from '../../../../../../src/nest/assistant/cards/tour/tour-route.cards';
-import {
-  MAX_CARD_CHARS,
-  trekCardSchema,
-  type TourRouteCard,
-  type TourRouteStretch,
-  type TrekCard,
-} from '@trek/shared';
+import { MAX_CARD_CHARS, trekCardSchema, type TourRouteCard, type TourRouteStretch, type TrekCard } from '@trek/shared';
 
 import { beforeEach, describe, expect, it, vi } from 'vitest';
 
diff --git a/shared/src/assistant/cards/card-parts.ts b/shared/src/assistant/cards/card-parts.ts
index fe9e74def..13d3b3d5c 100644
--- a/shared/src/assistant/cards/card-parts.ts
+++ b/shared/src/assistant/cards/card-parts.ts
@@ -17,8 +17,9 @@ export const cardLngSchema = z.number().min(-180).max(180);
 
 /** A point of a line to draw, `[lat, lng]` at five decimals; single points are `{ lat, lng }` objects. */
 export type CardPoint = [number, number];
-// Typed by hand: server and client compile without strictNullChecks, where an inferred tuple makes every item optional.
-export const cardPointSchema: z.ZodType<CardPoint> = z.tuple([cardLatSchema, cardLngSchema]);
+// Re-typed on the way out: server and client compile without strictNullChecks, where an inferred tuple
+// makes every item optional and no longer fits a `[number, number]`.
+export const cardPointSchema = z.tuple([cardLatSchema, cardLngSchema]).transform(([lat, lng]): CardPoint => [lat, lng]);
 
 export const cardDateSchema = z.string().regex(/^\d{4}-\d{2}-\d{2}$/);
 export const cardClockSchema = z.string().regex(/^([01]\d|2[0-3]):[0-5]\d$/);
diff --git a/shared/src/assistant/cards/tour-route.card.ts b/shared/src/assistant/cards/tour-route.card.ts
index 913ee186f..08c9f20f5 100644
--- a/shared/src/assistant/cards/tour-route.card.ts
+++ b/shared/src/assistant/cards/tour-route.card.ts
@@ -38,12 +38,10 @@ const sacStep = z.number().int().min(1).max(6);
 
 /** A point of the line, `[lat, lng, height]` at five decimals; every height is null when one is missing. */
 export type TourRoutePoint = [number, number, number | null];
-// Typed by hand like cardPointSchema: an inferred tuple reads every item as optional where strictNullChecks is off.
-export const tourRoutePointSchema: z.ZodType<TourRoutePoint> = z.tuple([
-  cardLatSchema,
-  cardLngSchema,
-  height.nullable(),
-]);
+// Re-typed on the way out like cardPointSchema, for the builds without strictNullChecks.
+export const tourRoutePointSchema = z
+  .tuple([cardLatSchema, cardLngSchema, height.nullable()])
+  .transform(([lat, lng, metres]): TourRoutePoint => [lat, lng, metres]);
 
 /** What a stop is beyond its role: a kind of place along a hike, its highest point, a city walk's station. */
 export const TOUR_ROUTE_STOP_KINDS = ['highest', 'station'] as const;