Add web multimodal image attachments

packages/host/apiproxy/tests/client-handler.spec.ts

@@ -30,6 +30,10 @@ function scriptedApi(overrides: {
       create: r => ok(r, { sessionId: sid('s-new') }),
       history: r => ok(r, { events: [], hasMore: false }),
       prompt: r => ok(r, { accepted: true as const }),
+      attachment: r => ok(r, {
+        attachment: { attachmentId: 'a' as never, mediaType: 'image/png', bytes: 1, width: 1, height: 1 },
+        data: 'AA==',
+      }),
       cancel: r => ok(r, { accepted: true as const }),
       ...overrides.sessions,
     },

packages/host/apiproxy/tests/fetch-carrier.spec.ts

@@ -33,6 +33,12 @@ function fakeApi(overrides: Partial<{ muxFrames: MuxFrame[]; hostFrames: HostFra
       async prompt(request) {
         return { rpcId: request.rpcId, result: { ok: true, value: { accepted: true as const } } }
       },
+      async attachment(request) {
+        return {
+          rpcId: request.rpcId,
+          result: { ok: true, value: { attachment: { attachmentId: 'a' as never, mediaType: 'image/png' as const, bytes: 1, width: 1, height: 1 }, data: 'AA==' } },
+        }
+      },
       async cancel(request) {
         return { rpcId: request.rpcId, result: { ok: true, value: { accepted: true as const } } }
       },

packages/host/apiproxy/tests/rpc-schemas.spec.ts

@@ -6,7 +6,8 @@ import {
 } from '../src/api/rpc.schema.ts'
 import { z } from 'zod'
 import {
-  contentBlockSchema, sessionCancelRequestSchema, sessionCancelValueSchema, sessionCreateRequestSchema,
+  promptContentPartSchema, sessionAttachmentRequestSchema, sessionAttachmentValueSchema,
+  sessionCancelRequestSchema, sessionCancelValueSchema, sessionCreateRequestSchema,
   sessionCreateValueSchema, sessionEventSchema, sessionHistoryRequestSchema, sessionHistoryValueSchema,
   sessionIdSchema, sessionListRequestSchema, sessionListValueSchema, sessionPromptRequestSchema,
   sessionPromptValueSchema, sessionSummarySchema,
@@ -31,6 +32,7 @@ describe('rpcErrorSchema', () => {
     expect(rpcErrorSchema.parse({ code: 'bad-request', message: 'm', details: { issues: [] } }).code).toBe('bad-request')
     expect(rpcErrorSchema.parse({ code: 'session-not-found', message: 'm', details: { sessionId: 's' } }).code).toBe('session-not-found')
     expect(rpcErrorSchema.parse({ code: 'agent-busy', message: 'm', details: { reason: 'r' } }).code).toBe('agent-busy')
+    expect(rpcErrorSchema.parse({ code: 'attachment-error', message: 'm', details: { reason: 'r' } }).code).toBe('attachment-error')
     expect(rpcErrorSchema.parse({ code: 'internal', message: 'm', details: {} }).code).toBe('internal')
   })
 
@@ -105,7 +107,20 @@ describe('sessions domain schemas', () => {
     expect(sessionPromptValueSchema.parse({ accepted: true }).accepted).toBe(true)
     expect(sessionCancelRequestSchema.parse({ sessionId: 's1' }).sessionId).toBe('s1')
     expect(sessionCancelValueSchema.parse({ accepted: true }).accepted).toBe(true)
-    expect(contentBlockSchema.parse({ type: 'text', text: 'x', extra: 1 })).toMatchObject({ extra: 1 })
+    expect(promptContentPartSchema.parse({ type: 'text', text: 'x', extra: 1 })).toEqual({ type: 'text', text: 'x' })
+    expect(promptContentPartSchema.parse({
+      type: 'image', mediaType: 'image/png', data: 'AA==', name: 'pixel.png',
+    })).toMatchObject({ type: 'image', mediaType: 'image/png', name: 'pixel.png' })
+    const attachment = {
+      attachmentId: `sha256:${'a'.repeat(64)}`,
+      mediaType: 'image/png' as const,
+      bytes: 1,
+      width: 1,
+      height: 1,
+    }
+    expect(sessionAttachmentRequestSchema.parse({ sessionId: 's1', attachmentId: attachment.attachmentId }))
+      .toMatchObject({ sessionId: 's1' })
+    expect(sessionAttachmentValueSchema.parse({ attachment, data: 'AA==' }).attachment).toEqual(attachment)
   })
 })