Merge dare proof of completion into staging

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

apps/api/drizzle/0021_dare_proof.sql

@@ -0,0 +1,16 @@
+-- Optional proof-of-completion for dares. The sender picks a requirement
+-- ('none', 'photo', 'audio') at send time for both catalogue and custom dares;
+-- the recipient attaches a media object when submitting.
+ALTER TABLE sent_dares ADD COLUMN IF NOT EXISTS proof_type text NOT NULL DEFAULT 'none';
+--> statement-breakpoint
+ALTER TABLE sent_dares DROP CONSTRAINT IF EXISTS sent_dares_proof_type_check;
+ALTER TABLE sent_dares ADD CONSTRAINT sent_dares_proof_type_check
+  CHECK (proof_type IN ('none', 'photo', 'audio'));
+--> statement-breakpoint
+ALTER TABLE sent_dares ADD COLUMN IF NOT EXISTS proof_media_id uuid REFERENCES media_objects(id) ON DELETE SET NULL;
+--> statement-breakpoint
+CREATE INDEX IF NOT EXISTS sent_dares_proof_media_idx ON sent_dares(proof_media_id) WHERE proof_media_id IS NOT NULL;
+--> statement-breakpoint
+ALTER TABLE media_objects DROP CONSTRAINT IF EXISTS media_objects_kind_check;
+ALTER TABLE media_objects ADD CONSTRAINT media_objects_kind_check
+  CHECK (kind IN ('avatar', 'response', 'chat', 'feedback', 'dare_proof'));

apps/api/src/domains/dares/repository.ts

@@ -4,6 +4,11 @@ import { closeResolvedPool, resolvePool, type DatabaseConnection } from '../../d
 export type DareStatus =
   | 'pending' | 'active' | 'submitted' | 'completed' | 'expired' | 'declined' | 'cancelled';
 
+/** Sender-chosen proof of completion; 'none' means a plain "I did it" suffices. */
+export type DareProofType = 'none' | 'photo' | 'audio';
+
+export const DARE_PROOF_TYPES: readonly DareProofType[] = ['none', 'photo', 'audio'];
+
 /** Free senders get a rolling weekly allowance; receiving and responding are never gated. */
 export const FREE_WEEKLY_SEND_LIMIT = 3;
 
@@ -45,6 +50,8 @@ export interface SentDare {
   direction: 'incoming' | 'outgoing';
   status: DareStatus;
   sender_notes: string | null;
+  proof_type: DareProofType;
+  proof_media_id: string | null;
   sent_at: string;
   accepted_at: string | null;
   submitted_at: string | null;
@@ -79,6 +86,7 @@ export interface SendDareInput {
   custom_dare_intensity?: number | null;
   duration_hours?: number | null;
   sender_notes?: string | null;
+  proof_type?: DareProofType | null;
 }
 
 export class DaresError extends Error {
@@ -111,6 +119,8 @@ interface SentDareRecord extends QueryResultRow {
   recipient_id: string;
   status: DareStatus;
   sender_notes: string | null;
+  proof_type: DareProofType;
+  proof_media_id: string | null;
   sent_at: Date;
   accepted_at: Date | null;
   submitted_at: Date | null;
@@ -124,7 +134,7 @@ export interface DaresRepository {
   listDares(userId: string, filter: 'active' | 'history'): Promise<SentDare[]>;
   send(userId: string, input: SendDareInput): Promise<SentDare>;
   respond(userId: string, dareId: string, action: 'accept' | 'decline'): Promise<SentDare>;
-  submit(userId: string, dareId: string): Promise<SentDare>;
+  submit(userId: string, dareId: string, proofMediaId?: string | null): Promise<SentDare>;
   complete(userId: string, dareId: string): Promise<SentDare>;
   cancel(userId: string, dareId: string): Promise<SentDare>;
   stats(userId: string): Promise<DareStats>;
@@ -132,7 +142,7 @@ export interface DaresRepository {
 }
 
 const BARE_COLUMNS = `id, couple_id, dare_id, dare_text_snapshot, dare_intensity_snapshot,
-  custom_dare_text, sender_id, recipient_id, status, sender_notes,
+  custom_dare_text, sender_id, recipient_id, status, sender_notes, proof_type, proof_media_id,
   sent_at, accepted_at, submitted_at, completed_at, expires_at`;
 
 const SENT_COLUMNS = BARE_COLUMNS.split(',').map((column) => `sd.${column.trim()}`).join(', ');
@@ -172,6 +182,8 @@ function toSentDare(row: SentDareRecord, viewerId: string): SentDare {
     direction: row.recipient_id === viewerId ? 'incoming' : 'outgoing',
     status: row.status,
     sender_notes: row.sender_notes,
+    proof_type: row.proof_type,
+    proof_media_id: row.proof_media_id,
     sent_at: row.sent_at.toISOString(),
     accepted_at: iso(row.accepted_at),
     submitted_at: iso(row.submitted_at),
@@ -323,6 +335,11 @@ export class PostgresDaresRepository implements DaresRepository {
       throw new DaresError('invalid_duration', 'Duration must be one of the offered presets', 400);
     }
 
+    const proofType = input.proof_type ?? 'none';
+    if (!DARE_PROOF_TYPES.includes(proofType)) {
+      throw new DaresError('invalid_proof_type', 'Proof must be none, photo, or audio', 400);
+    }
+
     let text: string;
     let intensity: number;
     let dareId: string | null = null;
@@ -376,15 +393,15 @@ export class PostgresDaresRepository implements DaresRepository {
         `insert into sent_dares (
            couple_id, dare_id, custom_dare_text, custom_dare_intensity,
            dare_text_snapshot, dare_intensity_snapshot,
-           sender_id, recipient_id, sender_notes, expires_at
+           sender_id, recipient_id, sender_notes, proof_type, expires_at
          ) values (
-           $1, $2, $3, $4, $5, $6, $7, $8, $9,
+           $1, $2, $3, $4, $5, $6, $7, $8, $9, $10,
-           case when $10::integer is null then null else now() + ($10::integer * interval '1 hour') end
+           case when $11::integer is null then null else now() + ($11::integer * interval '1 hour') end
          )
          returning ${BARE_COLUMNS}`,
         [
           context.couple_id, dareId, customText, customIntensity, text, intensity,
-          userId, context.partner_id, input.sender_notes?.trim() || null, duration,
+          userId, context.partner_id, input.sender_notes?.trim() || null, proofType, duration,
         ],
       );
       return toSentDare(result.rows[0]!, userId);
@@ -438,8 +455,59 @@ export class PostgresDaresRepository implements DaresRepository {
       : this.transition(userId, dareId, 'recipient', ['pending'], 'declined', null);
   }
 
-  async submit(userId: string, dareId: string): Promise<SentDare> {
+  /**
-    return this.transition(userId, dareId, 'recipient', ['active'], 'submitted', 'submitted_at');
+   * Submission enforces the sender's proof requirement: a proof-required dare
+   * cannot be marked done without media of the matching type. Proof is also
+   * accepted voluntarily on 'none' dares. Media ownership, kind, and couple are
+   * re-checked here so a submit cannot reference someone else's upload.
+   */
+  async submit(userId: string, dareId: string, proofMediaId?: string | null): Promise<SentDare> {
+    return transaction(this.pool, async (client) => {
+      const existing = await client.query<{
+        sender_id: string; recipient_id: string; status: DareStatus;
+        proof_type: DareProofType; couple_id: string;
+      }>(
+        'select sender_id, recipient_id, status, proof_type, couple_id from sent_dares where id = $1 for update',
+        [dareId],
+      );
+      const dare = existing.rows[0];
+      if (!dare || (dare.sender_id !== userId && dare.recipient_id !== userId)) {
+        throw new DaresError('dare_not_found', 'Dare not found', 404);
+      }
+      if (dare.recipient_id !== userId) {
+        throw new DaresError('not_permitted', 'Only the recipient can do that', 403);
+      }
+      if (dare.status !== 'active') {
+        throw new DaresError('invalid_transition', `A ${dare.status} dare cannot change to submitted`, 409);
+      }
+      if (dare.proof_type !== 'none' && !proofMediaId) {
+        throw new DaresError('proof_required', `This dare requires ${dare.proof_type} proof`, 400);
+      }
+      if (proofMediaId) {
+        const media = await client.query<{ kind: string; mime_type: string; owner_id: string; couple_id: string | null }>(
+          'select kind, mime_type, owner_id, couple_id from media_objects where id = $1 and deleted_at is null',
+          [proofMediaId],
+        );
+        const proof = media.rows[0];
+        if (!proof || proof.owner_id !== userId || proof.kind !== 'dare_proof' || proof.couple_id !== dare.couple_id) {
+          throw new DaresError('proof_not_found', 'Proof media not found', 404);
+        }
+        const category = dare.proof_type === 'none'
+          ? (proof.mime_type.startsWith('image/') || proof.mime_type.startsWith('audio/'))
+          : proof.mime_type.startsWith(dare.proof_type === 'photo' ? 'image/' : 'audio/');
+        if (!category) {
+          throw new DaresError('proof_type_mismatch', `This dare requires ${dare.proof_type} proof`, 400);
+        }
+      }
+      const result = await client.query<SentDareRecord>(
+        `update sent_dares
+            set status = 'submitted', submitted_at = now(), proof_media_id = $2::uuid
+          where id = $1
+          returning ${BARE_COLUMNS}`,
+        [dareId, proofMediaId ?? null],
+      );
+      return toSentDare(result.rows[0]!, userId);
+    });
   }
 
   async complete(userId: string, dareId: string): Promise<SentDare> {

apps/api/src/domains/dares/routes.ts

@@ -15,6 +15,7 @@ const sendBody = z
     custom_dare_intensity: z.number().int().min(1).max(5).nullish(),
     duration_hours: z.union([z.literal(1), z.literal(6), z.literal(12), z.literal(24), z.literal(72), z.literal(168)]).nullish(),
     sender_notes: z.string().trim().max(500).nullish(),
+    proof_type: z.enum(['none', 'photo', 'audio']).nullish(),
   })
   .strict()
   .refine((value) => Boolean(value.dare_id) !== Boolean(value.custom_dare_text), {
@@ -23,6 +24,8 @@ const sendBody = z
 
 const respondBody = z.object({ action: z.enum(['accept', 'decline']) }).strict();
 
+const submitBody = z.object({ proof_media_id: id.nullish() }).strict();
+
 function error(code: string, message: string): ApiErrorResponse {
   return { error: { code, message } };
 }
@@ -93,8 +96,20 @@ export function registerDareRoutes(app: DaresApp, repository: DaresRepository):
       : c.json(error(response.cause.code, response.cause.message), response.cause.status);
   });
 
+  app.post('/v1/dares/:dareId/submit', async (c) => {
+    const dareId = id.safeParse(c.req.param('dareId'));
+    if (!dareId.success) return c.json(error('invalid_dare_id', 'A valid dare ID is required'), 400);
+    // Body is optional: dares without a proof requirement submit with no payload.
+    const body = submitBody.safeParse(await c.req.json().catch(() => ({})));
+    if (!body.success) return c.json(error('invalid_proof', 'proof_media_id must be a valid media ID'), 400);
+    const response = await result(() =>
+      repository.submit(c.get('identity').id, dareId.data, body.data.proof_media_id ?? null));
+    return response.ok
+      ? c.json({ dare: response.value })
+      : c.json(error(response.cause.code, response.cause.message), response.cause.status);
+  });
+
   for (const [path, method] of [
-    ['submit', 'submit'],
     ['complete', 'complete'],
     ['cancel', 'cancel'],
   ] as const) {

apps/api/src/domains/media/repository.ts

@@ -39,7 +39,7 @@ export class PostgresMediaRepository implements MediaRepository {
       const profile = await client.query<{ couple_id: string | null }>('select couple_id from profiles where id=$1 for update', [userId]);
       if (!profile.rows[0]) throw new MediaError('profile_not_found', 'Profile not found', 404);
       const coupleId = profile.rows[0].couple_id;
-      if ((kind === 'response' || kind === 'chat') && !coupleId) throw new MediaError('couple_required', 'Join a couple before sharing media', 409);
+      if ((kind === 'response' || kind === 'chat' || kind === 'dare_proof') && !coupleId) throw new MediaError('couple_required', 'Join a couple before sharing media', 409);
       if (kind === 'response') {
         if (!context.questionId) throw new MediaError('question_required', 'A question ID is required', 400);
         const question = await client.query('select 1 from questions where id=$1 and deleted_at is null', [context.questionId]);
@@ -84,7 +84,7 @@ export class PostgresMediaRepository implements MediaRepository {
          from media_objects mo join profiles viewer on viewer.id=$1
         where mo.id=$2 and mo.deleted_at is null and (mo.expires_at is null or mo.expires_at>now())
           and not exists(select 1 from messages m where m.media_path='media:'||mo.id::text and (m.media_expired or m.media_expires_at<=now()))
-          and (mo.owner_id=$1 or (mo.kind in ('avatar','response','chat') and mo.couple_id is not null and mo.couple_id=viewer.couple_id))`,
+          and (mo.owner_id=$1 or (mo.kind in ('avatar','response','chat','dare_proof') and mo.couple_id is not null and mo.couple_id=viewer.couple_id))`,
       [userId, mediaId],
     );
     if (!result.rows[0]) throw new MediaError('media_not_found', 'Media not found', 404);

apps/api/src/domains/media/storage.ts

@@ -8,8 +8,9 @@ const allowed: Record<MediaKind, ReadonlySet<string>> = {
   response: new Set(['image/jpeg', 'image/png', 'image/webp', 'image/gif', 'audio/mp4', 'audio/m4a', 'audio/x-m4a', 'audio/mpeg', 'audio/wav', 'audio/webm', 'audio/aac', 'audio/x-caf']),
   chat: new Set(['image/jpeg', 'image/png', 'image/webp', 'image/gif', 'video/mp4', 'video/quicktime', 'video/webm']),
   feedback: new Set(['image/jpeg', 'image/png', 'image/webp']),
+  dare_proof: new Set(['image/jpeg', 'image/png', 'image/webp', 'audio/mp4', 'audio/m4a', 'audio/x-m4a', 'audio/mpeg', 'audio/wav', 'audio/webm', 'audio/aac', 'audio/x-caf']),
 };
-const limits: Record<MediaKind, number> = { avatar: 10*1024*1024, response: 25*1024*1024, chat: 50*1024*1024, feedback: 10*1024*1024 };
+const limits: Record<MediaKind, number> = { avatar: 10*1024*1024, response: 25*1024*1024, chat: 50*1024*1024, feedback: 10*1024*1024, dare_proof: 25*1024*1024 };
 const extensions: Record<string, string> = { 'image/jpeg':'.jpg','image/png':'.png','image/webp':'.webp','image/gif':'.gif','video/mp4':'.mp4','video/quicktime':'.mov','video/webm':'.webm','audio/mp4':'.m4a','audio/m4a':'.m4a','audio/x-m4a':'.m4a','audio/mpeg':'.mp3','audio/wav':'.wav','audio/webm':'.webm','audio/aac':'.aac','audio/x-caf':'.caf' };
 
 export class FilesystemMediaStorage {

apps/api/src/domains/media/types.ts

@@ -1,4 +1,4 @@
-export const mediaKinds = ['avatar', 'response', 'chat', 'feedback'] as const;
+export const mediaKinds = ['avatar', 'response', 'chat', 'feedback', 'dare_proof'] as const;
 export type MediaKind = typeof mediaKinds[number];
 
 export interface MediaObject {

apps/api/test/dares.integration.test.ts

@@ -196,6 +196,58 @@ describe.skipIf(!url || !local)('dares + PostgreSQL', () => {
     expect((await repo.listDares(recipient, 'history'))[0]!.direction).toBe('incoming');
   });
 
+  async function insertProof(owner: string, coupleId: string | null, mime: string, kind = 'dare_proof') {
+    const id = randomUUID();
+    await pool.query(
+      'insert into media_objects(id,owner_id,couple_id,kind,storage_key,mime_type,byte_size) values($1,$2,$3,$4,$5,$6,100)',
+      [id, owner, coupleId, kind, `${kind}/test/${id}.bin`, mime],
+    );
+    return id;
+  }
+
+  it('stores the proof requirement and defaults to none', async () => {
+    const plain = await repo.send(sender, { dare_id: freeDare });
+    expect(plain).toMatchObject({ proof_type: 'none', proof_media_id: null });
+    const proofed = await repo.send(sender, { dare_id: freeDare, proof_type: 'photo' });
+    expect(proofed.proof_type).toBe('photo');
+    await expect(repo.send(sender, { dare_id: freeDare, proof_type: 'video' as never }))
+      .rejects.toMatchObject({ code: 'invalid_proof_type' });
+  });
+
+  it('requires matching proof media before a proofed dare can be submitted', async () => {
+    const dare = await repo.send(sender, { dare_id: freeDare, proof_type: 'photo' });
+    await repo.respond(recipient, dare.id, 'accept');
+
+    await expect(repo.submit(recipient, dare.id)).rejects.toMatchObject({ code: 'proof_required' });
+    const audio = await insertProof(recipient, couple, 'audio/mp4');
+    await expect(repo.submit(recipient, dare.id, audio)).rejects.toMatchObject({ code: 'proof_type_mismatch' });
+
+    const photo = await insertProof(recipient, couple, 'image/jpeg');
+    const submitted = await repo.submit(recipient, dare.id, photo);
+    expect(submitted).toMatchObject({ status: 'submitted', proof_media_id: photo });
+    expect((await repo.complete(sender, dare.id)).status).toBe('completed');
+  });
+
+  it('refuses proof media the recipient does not own or that is not dare proof', async () => {
+    const dare = await repo.send(sender, { dare_id: freeDare, proof_type: 'photo' });
+    await repo.respond(recipient, dare.id, 'accept');
+
+    const foreign = await insertProof(outsider, otherCouple, 'image/jpeg');
+    await expect(repo.submit(recipient, dare.id, foreign)).rejects.toMatchObject({ code: 'proof_not_found' });
+    const wrongKind = await insertProof(recipient, couple, 'image/jpeg', 'chat');
+    await expect(repo.submit(recipient, dare.id, wrongKind)).rejects.toMatchObject({ code: 'proof_not_found' });
+    const senderOwned = await insertProof(sender, couple, 'image/jpeg');
+    await expect(repo.submit(recipient, dare.id, senderOwned)).rejects.toMatchObject({ code: 'proof_not_found' });
+  });
+
+  it('accepts voluntary proof on dares that did not require any', async () => {
+    const dare = await repo.send(sender, { dare_id: freeDare });
+    await repo.respond(recipient, dare.id, 'accept');
+    const photo = await insertProof(recipient, couple, 'image/jpeg');
+    const submitted = await repo.submit(recipient, dare.id, photo);
+    expect(submitted).toMatchObject({ status: 'submitted', proof_type: 'none', proof_media_id: photo });
+  });
+
   it('rejects durations outside the offered presets', async () => {
     await expect(repo.send(sender, { dare_id: freeDare, duration_hours: 5 })).rejects.toMatchObject({ code: 'invalid_duration' });
   });

apps/api/test/dares.routes.test.ts

@@ -13,10 +13,12 @@ const catalogueDareId = '55555555-5555-4555-8555-555555555555';
 const dare: SentDare = {
   id: dareId, couple_id: '66666666-6666-4666-8666-666666666666', dare_id: catalogueDareId,
   text: 'A dare', intensity: 2, is_custom: false, sender_id: identity.id, recipient_id: partner,
-  direction: 'outgoing', status: 'pending', sender_notes: null,
+  direction: 'outgoing', status: 'pending', sender_notes: null, proof_type: 'none', proof_media_id: null,
   sent_at: new Date().toISOString(), accepted_at: null, submitted_at: null, completed_at: null, expires_at: null,
 };
 
+const proofMediaId = '77777777-7777-4777-8777-777777777777';
+
 function setup(overrides: Partial<DaresRepository> = {}) {
   const repository: DaresRepository = {
     getCatalog: vi.fn(async () => ({
@@ -91,7 +93,7 @@ describe('dare routes', () => {
     await post(app, `/v1/dares/${dareId}/respond`, { action: 'decline' });
     expect(repository.respond).toHaveBeenCalledWith(identity.id, dareId, 'decline');
     await post(app, `/v1/dares/${dareId}/submit`);
-    expect(repository.submit).toHaveBeenCalledWith(identity.id, dareId);
+    expect(repository.submit).toHaveBeenCalledWith(identity.id, dareId, null);
     await post(app, `/v1/dares/${dareId}/complete`);
     expect(repository.complete).toHaveBeenCalledWith(identity.id, dareId);
     await post(app, `/v1/dares/${dareId}/cancel`);
@@ -109,6 +111,22 @@ describe('dare routes', () => {
     expect((await post(app, `/v1/dares/${dareId}/submit`)).status).toBe(409);
   });
 
+  it('accepts a proof requirement on send and rejects unknown ones', async () => {
+    const { app, repository } = setup();
+    const response = await post(app, '/v1/dares', { dare_id: catalogueDareId, proof_type: 'photo' });
+    expect(response.status).toBe(201);
+    expect(repository.send).toHaveBeenCalledWith(identity.id, expect.objectContaining({ proof_type: 'photo' }));
+    expect((await post(app, '/v1/dares', { dare_id: catalogueDareId, proof_type: 'video' })).status).toBe(400);
+  });
+
+  it('passes proof media through on submit and validates its shape', async () => {
+    const { app, repository } = setup();
+    await post(app, `/v1/dares/${dareId}/submit`, { proof_media_id: proofMediaId });
+    expect(repository.submit).toHaveBeenCalledWith(identity.id, dareId, proofMediaId);
+    expect((await post(app, `/v1/dares/${dareId}/submit`, { proof_media_id: 'not-a-uuid' })).status).toBe(400);
+    expect((await post(app, `/v1/dares/${dareId}/submit`, { extra_field: true })).status).toBe(400);
+  });
+
   it('exposes the duration presets the send sheet offers', async () => {
     const { app } = setup();
     const response = await app.request('/v1/dares/durations');

apps/mobile/src/__tests__/hooks/useDares.test.ts

@@ -7,7 +7,7 @@ import type { SentDare } from "@/features/dares/types";
 const incoming: SentDare = {
     id: "dare-1", couple_id: "couple-1", dare_id: "catalogue-1", text: "A dare", intensity: 2,
     is_custom: false, sender_id: "partner", recipient_id: "me", direction: "incoming",
-    status: "pending", sender_notes: null, sent_at: "2026-08-28T10:00:00.000Z",
+    status: "pending", sender_notes: null, proof_type: "none", proof_media_id: null, sent_at: "2026-08-28T10:00:00.000Z",
     accepted_at: null, submitted_at: null, completed_at: null, expires_at: null,
 };
 
@@ -55,6 +55,23 @@ describe("useDares", () => {
         expect(postSpy).toHaveBeenCalledWith("/v1/dares/dare-1/respond", { action: "accept" });
     });
 
+    it("attaches proof media to a submit when one is supplied", async () => {
+        mockLoad();
+        const postSpy = jest.spyOn(apiClient, "post").mockResolvedValue({ dare: { ...incoming, status: "submitted" } } as never);
+        const { result } = renderHook(() => useDares());
+        await waitFor(() => expect(result.current.loading).toBe(false));
+
+        await act(async () => {
+            await result.current.submit("dare-1", "media-1");
+        });
+        expect(postSpy).toHaveBeenCalledWith("/v1/dares/dare-1/submit", { proof_media_id: "media-1" });
+
+        await act(async () => {
+            await result.current.submit("dare-1");
+        });
+        expect(postSpy).toHaveBeenLastCalledWith("/v1/dares/dare-1/submit", undefined);
+    });
+
     it("routes a premium refusal to the paywall rather than the error banner", async () => {
         mockLoad();
         jest.spyOn(apiClient, "post").mockRejectedValue(new ApiError("Custom dares require premium", 402));

apps/mobile/src/features/dares/DaresScreen.tsx

@@ -6,9 +6,9 @@ import Animated, { FadeIn } from "react-native-reanimated";
 import { GradientBackground } from "../../components/ui";
 import { Paywall } from "../../components/paywall";
 import { colors, featureColors, radius, spacing, typography } from "../../theme";
-import { DareCard, DarePackGrid, SendDareSheet } from "./components";
+import { DareCard, DarePackGrid, DareProofSheet, SendDareSheet } from "./components";
 import { useDares } from "./hooks/useDares";
-import type { DarePack } from "./types";
+import type { DarePack, SentDare } from "./types";
 
 const ACCENT = featureColors.dares.accent;
 
@@ -27,6 +27,7 @@ export function DaresScreen() {
     const [sheetPack, setSheetPack] = useState<DarePack | null>(null);
     const [sheetOpen, setSheetOpen] = useState(false);
     const [paywallOpen, setPaywallOpen] = useState(false);
+    const [proofDare, setProofDare] = useState<SentDare | null>(null);
 
     const openPaywall = useCallback(() => {
         setSheetOpen(false);
@@ -68,6 +69,14 @@ export function DaresScreen() {
                 void dares.respond(dareId, action);
                 return;
             }
+            if (action === "submit") {
+                // Proof-required dares detour through the capture sheet before submitting.
+                const dare = dares.active.find((candidate) => candidate.id === dareId);
+                if (dare && dare.proof_type !== "none") {
+                    setProofDare(dare);
+                    return;
+                }
+            }
             void dares[action](dareId);
         },
         [dares],
@@ -173,6 +182,12 @@ export function DaresScreen() {
                 onRequestPremium={openPaywall}
             />
 
+            <DareProofSheet
+                dare={proofDare}
+                onClose={() => setProofDare(null)}
+                onSubmit={(dareId, proofMediaId) => dares.submit(dareId, proofMediaId)}
+            />
+
             <Paywall
                 visible={paywallOpen}
                 onClose={closePaywall}

apps/mobile/src/features/dares/components/DareCard.tsx

@@ -2,6 +2,7 @@ import { memo } from "react";
 import { ActivityIndicator, Pressable, StyleSheet, Text, View } from "react-native";
 import { Ionicons } from "@expo/vector-icons";
 import { colors, featureColors, radius, spacing, typography } from "../../../theme";
+import { DareProofView } from "./DareProofView";
 import type { SentDare } from "../types";
 
 const ACCENT = featureColors.dares.accent;
@@ -92,6 +93,23 @@ export const DareCard = memo(function DareCard({ dare, busy, onAction }: DareCar
 
             {dare.sender_notes ? <Text style={styles.notes}>“{dare.sender_notes}”</Text> : null}
 
+            {dare.proof_type !== "none" ? (
+                <View style={styles.proofRow}>
+                    <Ionicons
+                        name={dare.proof_type === "photo" ? "camera-outline" : "mic-outline"}
+                        size={13}
+                        color={ACCENT}
+                    />
+                    <Text style={styles.proofLabel}>
+                        {dare.proof_type === "photo" ? "Photo proof required" : "Audio proof required"}
+                    </Text>
+                </View>
+            ) : null}
+
+            {dare.proof_media_id && dare.proof_type !== "none" ? (
+                <DareProofView proofMediaId={dare.proof_media_id} proofType={dare.proof_type} />
+            ) : null}
+
             {deadline ? (
                 <View style={styles.deadlineRow}>
                     <Ionicons name="time-outline" size={13} color={colors.textTertiary} />
@@ -157,6 +175,13 @@ const styles = StyleSheet.create({
         fontStyle: "italic",
         marginTop: spacing.sm,
     },
+    proofRow: {
+        flexDirection: "row",
+        alignItems: "center",
+        gap: spacing.xs,
+        marginTop: spacing.sm,
+    },
+    proofLabel: { ...typography.caption1, color: ACCENT, fontWeight: "600" },
     deadlineRow: {
         flexDirection: "row",
         alignItems: "center",

apps/mobile/src/features/dares/components/DareProofSheet.tsx

@@ -0,0 +1,243 @@
+import { useCallback, useEffect, useState } from "react";
+import {
+    ActivityIndicator, Image, Modal, Platform, Pressable, StyleSheet, Text, View,
+} from "react-native";
+import { Ionicons } from "@expo/vector-icons";
+import * as ImagePicker from "expo-image-picker";
+import { useAudioRecorder } from "../../../hooks/useAudioRecorder";
+import { uploadMedia } from "../../../lib/mediaApi";
+import { colors, featureColors, radius, spacing, typography } from "../../../theme";
+import type { SentDare } from "../types";
+
+const ACCENT = featureColors.dares.accent;
+
+const MAX_AUDIO_SECONDS = 60;
+
+export interface DareProofSheetProps {
+    /** The active incoming dare being submitted; null closes the sheet. */
+    dare: SentDare | null;
+    onClose: () => void;
+    /** Uploads have already happened; the id is ready to attach to the submit call. */
+    onSubmit: (dareId: string, proofMediaId: string) => Promise<void> | void;
+}
+
+function imageMime(uri: string): string {
+    const ext = uri.split(".").pop()?.toLowerCase() ?? "jpg";
+    if (ext === "png") return "image/png";
+    if (ext === "webp") return "image/webp";
+    return "image/jpeg";
+}
+
+/** expo-av records .m4a on both platforms; web lands on webm. */
+function audioMime(uri: string): string {
+    const ext = uri.split(".").pop()?.toLowerCase() ?? "m4a";
+    if (ext === "webm") return "audio/webm";
+    if (ext === "wav") return "audio/wav";
+    if (ext === "mp3") return "audio/mpeg";
+    if (ext === "caf") return "audio/x-caf";
+    return "audio/mp4";
+}
+
+export function DareProofSheet({ dare, onClose, onSubmit }: DareProofSheetProps) {
+    const [photoUri, setPhotoUri] = useState<string | null>(null);
+    const [sending, setSending] = useState(false);
+    const [error, setError] = useState<string | null>(null);
+
+    const recorder = useAudioRecorder({ maxDurationSeconds: MAX_AUDIO_SECONDS });
+    const visible = dare !== null;
+    const mode = dare?.proof_type ?? "none";
+
+    useEffect(() => {
+        if (!visible) return;
+        setPhotoUri(null);
+        setError(null);
+        setSending(false);
+        recorder.resetRecording();
+        // Reset only when a new dare opens the sheet, not on recorder identity churn.
+        // eslint-disable-next-line react-hooks/exhaustive-deps
+    }, [visible, dare?.id]);
+
+    const pickPhoto = useCallback(async (fromCamera: boolean) => {
+        setError(null);
+        if (fromCamera) {
+            const permission = await ImagePicker.requestCameraPermissionsAsync();
+            if (!permission.granted) {
+                setError("Camera access is needed to take a proof photo.");
+                return;
+            }
+        }
+        const result = fromCamera
+            ? await ImagePicker.launchCameraAsync({ allowsEditing: false, quality: 0.7 })
+            : await ImagePicker.launchImageLibraryAsync({
+                  mediaTypes: ImagePicker.MediaTypeOptions.Images,
+                  allowsEditing: false,
+                  quality: 0.7,
+              });
+        if (!result.canceled) setPhotoUri(result.assets[0].uri);
+    }, []);
+
+    const proofUri = mode === "photo" ? photoUri : recorder.recordingUri;
+    const canSend = proofUri !== null && !sending && recorder.state !== "recording";
+
+    const handleSend = useCallback(async () => {
+        if (!dare || !proofUri) return;
+        setSending(true);
+        setError(null);
+        try {
+            const mimeType = mode === "photo" ? imageMime(proofUri) : audioMime(proofUri);
+            const upload = await uploadMedia(proofUri, { kind: "dare_proof", mimeType });
+            await onSubmit(dare.id, upload.media.id);
+            onClose();
+        } catch {
+            setError("Could not send your proof. Check your connection and try again.");
+        } finally {
+            setSending(false);
+        }
+    }, [dare, proofUri, mode, onSubmit, onClose]);
+
+    return (
+        <Modal visible={visible} animationType="slide" transparent onRequestClose={onClose}>
+            <View style={styles.backdrop}>
+                <View style={styles.sheet}>
+                    <View style={styles.handle} />
+                    <View style={styles.header}>
+                        <Text style={styles.title}>
+                            {mode === "photo" ? "Photo proof" : "Audio proof"}
+                        </Text>
+                        <Pressable onPress={onClose} hitSlop={12} disabled={sending}>
+                            <Ionicons name="close" size={22} color={colors.textSecondary} />
+                        </Pressable>
+                    </View>
+
+                    <Text style={styles.subtitle}>
+                        {mode === "photo"
+                            ? "Your partner asked for a photo to prove this one."
+                            : "Your partner asked for a voice note to prove this one."}
+                    </Text>
+
+                    {mode === "photo" ? (
+                        <View style={styles.captureArea}>
+                            {photoUri ? (
+                                <Image source={{ uri: photoUri }} style={styles.preview} resizeMode="cover" />
+                            ) : (
+                                <View style={styles.placeholder}>
+                                    <Ionicons name="camera-outline" size={32} color={colors.textTertiary} />
+                                </View>
+                            )}
+                            <View style={styles.captureButtons}>
+                                {Platform.OS !== "web" ? (
+                                    <Pressable style={styles.captureButton} onPress={() => void pickPhoto(true)}>
+                                        <Ionicons name="camera" size={16} color={ACCENT} />
+                                        <Text style={styles.captureButtonText}>Take photo</Text>
+                                    </Pressable>
+                                ) : null}
+                                <Pressable style={styles.captureButton} onPress={() => void pickPhoto(false)}>
+                                    <Ionicons name="images-outline" size={16} color={ACCENT} />
+                                    <Text style={styles.captureButtonText}>
+                                        {photoUri ? "Choose another" : "Choose photo"}
+                                    </Text>
+                                </Pressable>
+                            </View>
+                        </View>
+                    ) : (
+                        <View style={styles.captureArea}>
+                            <Pressable
+                                style={[styles.recordButton, recorder.state === "recording" && styles.recordButtonActive]}
+                                onPress={() => {
+                                    if (recorder.state === "recording") void recorder.stopRecording();
+                                    else void recorder.startRecording();
+                                }}
+                                disabled={sending}
+                            >
+                                <Ionicons
+                                    name={recorder.state === "recording" ? "stop" : "mic"}
+                                    size={28}
+                                    color={recorder.state === "recording" ? colors.background : ACCENT}
+                                />
+                            </Pressable>
+                            <Text style={styles.recordStatus}>
+                                {recorder.state === "recording"
+                                    ? `Recording… ${recorder.durationSeconds}s`
+                                    : recorder.recordingUri
+                                      ? `Recorded ${recorder.durationSeconds}s — tap the mic to redo`
+                                      : `Tap to record (up to ${MAX_AUDIO_SECONDS}s)`}
+                            </Text>
+                        </View>
+                    )}
+
+                    {error ? <Text style={styles.error}>{error}</Text> : null}
+
+                    <Pressable
+                        onPress={() => void handleSend()}
+                        disabled={!canSend}
+                        style={[styles.sendButton, !canSend && styles.sendButtonDisabled]}
+                    >
+                        {sending ? (
+                            <ActivityIndicator size="small" color={colors.background} />
+                        ) : (
+                            <Text style={styles.sendButtonText}>Send proof & finish dare</Text>
+                        )}
+                    </Pressable>
+                </View>
+            </View>
+        </Modal>
+    );
+}
+
+const styles = StyleSheet.create({
+    backdrop: { flex: 1, backgroundColor: "rgba(0,0,0,0.6)", justifyContent: "flex-end" },
+    sheet: {
+        backgroundColor: colors.background,
+        borderTopLeftRadius: radius.xxl,
+        borderTopRightRadius: radius.xxl,
+        paddingHorizontal: spacing.lg,
+        paddingBottom: Platform.OS === "ios" ? spacing.xl : spacing.lg,
+    },
+    handle: {
+        width: 36, height: 4, borderRadius: radius.full,
+        backgroundColor: colors.border, alignSelf: "center", marginTop: spacing.sm,
+    },
+    header: {
+        flexDirection: "row", alignItems: "center", justifyContent: "space-between",
+        paddingVertical: spacing.md,
+    },
+    title: { ...typography.title3, color: colors.text },
+    subtitle: { ...typography.subhead, color: colors.textSecondary, marginBottom: spacing.lg },
+    captureArea: { alignItems: "center", gap: spacing.md, marginBottom: spacing.lg },
+    preview: {
+        width: "100%", height: 220,
+        borderRadius: radius.lg, borderWidth: 1, borderColor: colors.border,
+    },
+    placeholder: {
+        width: "100%", height: 220,
+        borderRadius: radius.lg, borderWidth: 1, borderColor: colors.border,
+        backgroundColor: colors.backgroundLight,
+        alignItems: "center", justifyContent: "center",
+    },
+    captureButtons: { flexDirection: "row", gap: spacing.sm },
+    captureButton: {
+        flexDirection: "row", alignItems: "center", gap: spacing.xs,
+        paddingHorizontal: spacing.md, paddingVertical: spacing.sm,
+        borderRadius: radius.full, borderWidth: 1, borderColor: ACCENT,
+    },
+    captureButtonText: { ...typography.subhead, color: ACCENT, fontWeight: "600" },
+    recordButton: {
+        width: 72, height: 72, borderRadius: radius.full,
+        borderWidth: 2, borderColor: ACCENT,
+        alignItems: "center", justifyContent: "center",
+        backgroundColor: colors.backgroundLight,
+    },
+    recordButtonActive: { backgroundColor: ACCENT },
+    recordStatus: { ...typography.footnote, color: colors.textSecondary },
+    error: { ...typography.footnote, color: colors.error, marginBottom: spacing.md },
+    sendButton: {
+        backgroundColor: ACCENT,
+        borderRadius: radius.full,
+        paddingVertical: spacing.md,
+        alignItems: "center",
+        justifyContent: "center",
+        minHeight: 50,
+    },
+    sendButtonDisabled: { opacity: 0.4 },
+    sendButtonText: { ...typography.headline, color: colors.background, fontWeight: "700" },
+});

apps/mobile/src/features/dares/components/DareProofView.tsx

@@ -0,0 +1,112 @@
+import { useCallback, useEffect, useState } from "react";
+import { ActivityIndicator, Image, Pressable, StyleSheet, Text, View } from "react-native";
+import { Ionicons } from "@expo/vector-icons";
+import { Audio } from "expo-av";
+import { getMediaUrl } from "../../../lib/mediaApi";
+import { colors, featureColors, radius, spacing, typography } from "../../../theme";
+import type { DareProofType } from "../types";
+
+const ACCENT = featureColors.dares.accent;
+
+export interface DareProofViewProps {
+    proofMediaId: string;
+    proofType: DareProofType;
+}
+
+/**
+ * Renders the attached proof inline on a dare card: the photo itself, or a
+ * play button for audio. Signed URLs are short-lived, so the URL is resolved
+ * lazily on first render (photo) or first play (audio).
+ */
+export function DareProofView({ proofMediaId, proofType }: DareProofViewProps) {
+    const [url, setUrl] = useState<string | null>(null);
+    const [failed, setFailed] = useState(false);
+    const [sound, setSound] = useState<Audio.Sound | null>(null);
+    const [playing, setPlaying] = useState(false);
+    const [loadingAudio, setLoadingAudio] = useState(false);
+
+    useEffect(() => {
+        if (proofType !== "photo") return;
+        let cancelled = false;
+        getMediaUrl(proofMediaId)
+            .then((result) => { if (!cancelled) setUrl(result.url); })
+            .catch(() => { if (!cancelled) setFailed(true); });
+        return () => { cancelled = true; };
+    }, [proofMediaId, proofType]);
+
+    useEffect(() => {
+        return () => { if (sound) void sound.unloadAsync(); };
+    }, [sound]);
+
+    const togglePlayback = useCallback(async () => {
+        try {
+            if (sound) {
+                const status = await sound.getStatusAsync();
+                if (status.isLoaded && status.isPlaying) {
+                    await sound.pauseAsync();
+                    setPlaying(false);
+                } else {
+                    await sound.replayAsync();
+                    setPlaying(true);
+                }
+                return;
+            }
+            setLoadingAudio(true);
+            const { url: signedUrl } = await getMediaUrl(proofMediaId);
+            const created = await Audio.Sound.createAsync(
+                { uri: signedUrl },
+                { shouldPlay: true },
+                (status) => {
+                    if (status.isLoaded && status.didJustFinish) setPlaying(false);
+                },
+            );
+            setSound(created.sound);
+            setPlaying(true);
+        } catch {
+            setFailed(true);
+        } finally {
+            setLoadingAudio(false);
+        }
+    }, [sound, proofMediaId]);
+
+    if (failed) {
+        return <Text style={styles.failed}>Proof could not be loaded.</Text>;
+    }
+
+    if (proofType === "photo") {
+        return url ? (
+            <Image source={{ uri: url }} style={styles.photo} resizeMode="cover" />
+        ) : (
+            <ActivityIndicator size="small" color={ACCENT} style={styles.loader} />
+        );
+    }
+
+    return (
+        <Pressable style={styles.audioRow} onPress={() => void togglePlayback()} disabled={loadingAudio}>
+            {loadingAudio ? (
+                <ActivityIndicator size="small" color={ACCENT} />
+            ) : (
+                <Ionicons name={playing ? "pause-circle" : "play-circle"} size={28} color={ACCENT} />
+            )}
+            <Text style={styles.audioLabel}>{playing ? "Playing proof…" : "Play audio proof"}</Text>
+        </Pressable>
+    );
+}
+
+const styles = StyleSheet.create({
+    photo: {
+        width: "100%", height: 180, marginTop: spacing.sm,
+        borderRadius: radius.md, borderWidth: 1, borderColor: colors.border,
+    },
+    loader: { marginTop: spacing.sm, alignSelf: "flex-start" },
+    audioRow: {
+        flexDirection: "row", alignItems: "center", gap: spacing.sm,
+        marginTop: spacing.sm,
+        paddingHorizontal: spacing.md, paddingVertical: spacing.sm,
+        borderRadius: radius.md, borderWidth: 1, borderColor: colors.border,
+        backgroundColor: colors.background,
+        alignSelf: "flex-start",
+    },
+    audioLabel: { ...typography.subhead, color: colors.text, fontWeight: "600" },
+    failed: { ...typography.footnote, color: colors.textTertiary, marginTop: spacing.sm },
+});

apps/mobile/src/features/dares/components/SendDareSheet.tsx

@@ -6,7 +6,7 @@ import {
 import { Ionicons } from "@expo/vector-icons";
 import { daresApi } from "../../../lib/daresApi";
 import { colors, featureColors, radius, spacing, typography } from "../../../theme";
-import { DURATION_OPTIONS, type DareItem, type DarePack, type SendDarePayload } from "../types";
+import { DURATION_OPTIONS, PROOF_OPTIONS, type DareItem, type DarePack, type DareProofType, type SendDarePayload } from "../types";
 
 const ACCENT = featureColors.dares.accent;
 
@@ -26,6 +26,7 @@ export function SendDareSheet({ visible, pack, canSendCustom, onClose, onSend, o
     const [selectedId, setSelectedId] = useState<string | null>(null);
     const [customText, setCustomText] = useState("");
     const [durationHours, setDurationHours] = useState<number | null>(24);
+    const [proofType, setProofType] = useState<DareProofType>("none");
     const [notes, setNotes] = useState("");
     const [sending, setSending] = useState(false);
 
@@ -35,6 +36,7 @@ export function SendDareSheet({ visible, pack, canSendCustom, onClose, onSend, o
         setSelectedId(null);
         setCustomText("");
         setNotes("");
+        setProofType("none");
         daresApi
             .packDares(pack.id)
             .then((result) => setDares(result.dares))
@@ -52,10 +54,11 @@ export function SendDareSheet({ visible, pack, canSendCustom, onClose, onSend, o
             ? { custom_dare_text: customText.trim(), custom_dare_intensity: 3, duration_hours: durationHours }
             : { dare_id: selectedId!, duration_hours: durationHours };
         if (notes.trim()) payload.sender_notes = notes.trim();
+        if (proofType !== "none") payload.proof_type = proofType;
         const sent = await onSend(payload);
         setSending(false);
         if (sent) onClose();
-    }, [canSubmit, sending, isCustom, customText, selectedId, durationHours, notes, onSend, onClose]);
+    }, [canSubmit, sending, isCustom, customText, selectedId, durationHours, proofType, notes, onSend, onClose]);
 
     return (
         <Modal visible={visible} animationType="slide" transparent onRequestClose={onClose}>
@@ -135,6 +138,29 @@ export function SendDareSheet({ visible, pack, canSendCustom, onClose, onSend, o
                             })}
                         </View>
 
+                        <Text style={styles.sectionLabel}>REQUIRE PROOF</Text>
+                        <View style={styles.durationRow}>
+                            {PROOF_OPTIONS.map((option) => {
+                                const selected = option.value === proofType;
+                                return (
+                                    <Pressable
+                                        key={option.value}
+                                        onPress={() => setProofType(option.value)}
+                                        style={[styles.chip, styles.proofChip, selected && styles.chipSelected]}
+                                    >
+                                        <Ionicons
+                                            name={option.icon as keyof typeof Ionicons.glyphMap}
+                                            size={14}
+                                            color={selected ? ACCENT : colors.textSecondary}
+                                        />
+                                        <Text style={[styles.chipText, selected && styles.chipTextSelected]}>
+                                            {option.label}
+                                        </Text>
+                                    </Pressable>
+                                );
+                            })}
+                        </View>
+
                         <Text style={styles.sectionLabel}>ADD A NOTE</Text>
                         <TextInput
                             style={styles.notesInput}
@@ -229,6 +255,7 @@ const styles = StyleSheet.create({
         paddingHorizontal: spacing.md, paddingVertical: spacing.sm - 2,
         borderRadius: radius.full, borderWidth: 1, borderColor: colors.border,
     },
+    proofChip: { flexDirection: "row", alignItems: "center", gap: spacing.xs },
     chipSelected: { borderColor: ACCENT, backgroundColor: "rgba(212,175,55,0.12)" },
     chipText: { ...typography.footnote, color: colors.textSecondary },
     chipTextSelected: { color: ACCENT, fontWeight: "600" },

apps/mobile/src/features/dares/components/index.ts

@@ -4,3 +4,7 @@ export { DarePackGrid } from "./DarePackGrid";
 export type { DarePackGridProps } from "./DarePackGrid";
 export { SendDareSheet } from "./SendDareSheet";
 export type { SendDareSheetProps } from "./SendDareSheet";
+export { DareProofSheet } from "./DareProofSheet";
+export type { DareProofSheetProps } from "./DareProofSheet";
+export { DareProofView } from "./DareProofView";
+export type { DareProofViewProps } from "./DareProofView";

apps/mobile/src/features/dares/hooks/useDares.ts

@@ -30,7 +30,7 @@ export interface UseDaresReturn {
     refresh: () => Promise<void>;
     send: (payload: SendDarePayload) => Promise<boolean>;
     respond: (dareId: string, action: "accept" | "decline") => Promise<void>;
-    submit: (dareId: string) => Promise<void>;
+    submit: (dareId: string, proofMediaId?: string) => Promise<void>;
     complete: (dareId: string) => Promise<void>;
     cancel: (dareId: string) => Promise<void>;
 }
@@ -167,7 +167,7 @@ export function useDares({ isFocused = true }: UseDaresConfig = {}): UseDaresRet
         refresh,
         send,
         respond: useCallback((dareId, action) => act(dareId, () => daresApi.respond(dareId, action)), [act]),
-        submit: useCallback((dareId) => act(dareId, () => daresApi.submit(dareId)), [act]),
+        submit: useCallback((dareId, proofMediaId) => act(dareId, () => daresApi.submit(dareId, proofMediaId)), [act]),
         complete: useCallback((dareId) => act(dareId, () => daresApi.complete(dareId)), [act]),
         cancel: useCallback((dareId) => act(dareId, () => daresApi.cancel(dareId)), [act]),
     };

apps/mobile/src/features/dares/types.ts

@@ -1,6 +1,9 @@
 export type DareStatus =
     | "pending" | "active" | "submitted" | "completed" | "expired" | "declined" | "cancelled";
 
+/** Sender-chosen proof of completion; "none" means a plain "I did it" suffices. */
+export type DareProofType = "none" | "photo" | "audio";
+
 export interface DarePack {
     id: string;
     name: string;
@@ -36,6 +39,8 @@ export interface SentDare {
     direction: "incoming" | "outgoing";
     status: DareStatus;
     sender_notes: string | null;
+    proof_type: DareProofType;
+    proof_media_id: string | null;
     sent_at: string;
     accepted_at: string | null;
     submitted_at: string | null;
@@ -70,8 +75,15 @@ export interface SendDarePayload {
     custom_dare_intensity?: number;
     duration_hours?: number | null;
     sender_notes?: string | null;
+    proof_type?: DareProofType;
 }
 
+export const PROOF_OPTIONS: { label: string; value: DareProofType; icon: string }[] = [
+    { label: "No proof", value: "none", icon: "checkmark-circle-outline" },
+    { label: "Photo", value: "photo", icon: "camera-outline" },
+    { label: "Audio", value: "audio", icon: "mic-outline" },
+];
+
 export const DURATION_OPTIONS: { label: string; hours: number | null }[] = [
     { label: "1 hour", hours: 1 },
     { label: "6 hours", hours: 6 },

apps/mobile/src/lib/daresApi.ts

@@ -13,7 +13,11 @@ export const daresApi = {
     send: (payload: SendDarePayload) => apiClient.post<{ dare: SentDare }>("/v1/dares", payload),
     respond: (dareId: string, action: "accept" | "decline") =>
         apiClient.post<{ dare: SentDare }>(`${dare(dareId)}/respond`, { action }),
-    submit: (dareId: string) => apiClient.post<{ dare: SentDare }>(`${dare(dareId)}/submit`),
+    submit: (dareId: string, proofMediaId?: string) =>
+        apiClient.post<{ dare: SentDare }>(
+            `${dare(dareId)}/submit`,
+            proofMediaId ? { proof_media_id: proofMediaId } : undefined,
+        ),
     complete: (dareId: string) => apiClient.post<{ dare: SentDare }>(`${dare(dareId)}/complete`),
     cancel: (dareId: string) => apiClient.post<{ dare: SentDare }>(`${dare(dareId)}/cancel`),
 };

apps/mobile/src/lib/mediaApi.ts

@@ -3,7 +3,7 @@ import * as FileSystem from 'expo-file-system/legacy';
 import { decode } from 'base64-arraybuffer';
 import { ApiError, apiClient, authenticatedFetch } from './apiClient';
 
-export type MediaKind = 'avatar' | 'response' | 'chat' | 'feedback';
+export type MediaKind = 'avatar' | 'response' | 'chat' | 'feedback' | 'dare_proof';
 export interface UploadMediaOptions { kind: MediaKind; mimeType: string; questionId?: string; matchId?: string }
 export interface MediaUploadResponse { reference: string; media: { id: string; mime_type: string; byte_size: number }; message?: Record<string, unknown> }
 

docs/dares-feature.md

@@ -595,7 +595,7 @@ Features observed in competitor apps (Desire, Kindu, Spicer, Lovewick):
 | Decline Option | ✅ | No negative impact |
 | Dare History | ✅ | Via `sent_dares` table |
 | Chat per Dare | ✅ | `dare_messages` table |
-| Proof/Verification | ❌ | Not in v1 (could add photo proof later) |
+| Proof/Verification | ✅ | Optional photo/audio proof, chosen by the sender per dare |
 | Daily/Random Dares | ❌ | Not in v1 (could add "random dare" button) |
 | Dare Rewards | ❌ | Not in v1 (could unlock content) |
 | Streak Tracking | ❌ | Not in v1 (could add later) |

docs/dares-loop.md

@@ -109,15 +109,26 @@ and validated server-side.
 | GET | `/v1/dares?filter=active\|history` | Couple-scoped; `direction` is relative to the caller |
 | GET | `/v1/dares/stats` | Shared scoreboard |
 | GET | `/v1/dares/durations` | Preset list the send sheet renders |
-| POST | `/v1/dares` | `dare_id` **or** `custom_dare_text`, never both |
+| POST | `/v1/dares` | `dare_id` **or** `custom_dare_text`, never both; optional `proof_type` (`none`/`photo`/`audio`) |
 | POST | `/v1/dares/:dareId/respond` | `{ action: "accept" \| "decline" }` |
-| POST | `/v1/dares/:dareId/submit` | Recipient reports done |
+| POST | `/v1/dares/:dareId/submit` | Recipient reports done; `{ proof_media_id }` required when the dare has a proof requirement |
 | POST | `/v1/dares/:dareId/complete` | Sender confirms |
 | POST | `/v1/dares/:dareId/cancel` | Sender withdraws |
 
 The actor always comes from the bearer identity; ownership fields in a request body are
 rejected.
 
+## Proof of completion
+
+The sender may optionally require proof when sending any dare, catalogue or custom:
+`sent_dares.proof_type` is `'none'` (default), `'photo'`, or `'audio'`. The recipient
+uploads the proof first (`POST /v1/media/dare_proof` — images and audio, 25MB cap,
+couple-scoped so the sender can view it) and passes the resulting media id to `submit`.
+The server enforces the requirement: a proofed dare cannot be submitted without media of
+the matching type, and the media must be a `dare_proof` object owned by the recipient in
+the same couple. Voluntary proof on a `'none'` dare is accepted. The proof renders inline
+on the dare card (photo, or an audio player) via the standard signed-URL flow.
+
 ## Mobile
 
 Reached from the home screen's `DaresTile`, which badges pending incoming dares. The
@@ -142,4 +153,4 @@ actually changed, or on an explicit refresh or a mutation. See
 
 Per-dare chat. `dare_messages` exists and is wired into the schema, but a second inbox
 split from the main match chat was cut in favour of status transitions plus the sender's
-note. Photo proof, random-dare, and streaks remain unbuilt.
+note. Random-dare and streaks remain unbuilt.