diff --git a/packages/client/file-upload/package.json b/packages/client/file-upload/package.json
index d55aebb8c7..9cbc484b84 100644
--- a/packages/client/file-upload/package.json
+++ b/packages/client/file-upload/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@deepseek-ai/dsh-client-file-upload",
   "description": "Browser background upload service for Blob and ReadableStream request bodies",
-  "version": "0.1.2-alpha.4",
+  "version": "0.1.2-rc.1",
   "publishConfig": {
     "access": "public"
   },
diff --git a/packages/client/ui-chat/src/client/contract/assistant-content.ts b/packages/client/ui-chat/src/client/contract/assistant-content.ts
index e06c025873..18beac1cbf 100644
--- a/packages/client/ui-chat/src/client/contract/assistant-content.ts
+++ b/packages/client/ui-chat/src/client/contract/assistant-content.ts
@@ -1,4 +1,4 @@
-import type { AssistantBlock } from './snapshot.ts'
+import type { AssistantBlock } from '@deepseek-ai/dsh-client-ui-conversation/client'
 
 /**
  * Test whether Assistant blocks contain a user-facing reply rather than only
diff --git a/packages/client/ui-chat/src/client/contract/slots.ts b/packages/client/ui-chat/src/client/contract/slots.ts
index 12557c1c73..eb2ed7cf83 100644
--- a/packages/client/ui-chat/src/client/contract/slots.ts
+++ b/packages/client/ui-chat/src/client/contract/slots.ts
@@ -2,8 +2,8 @@
 import type { MessageId } from '@deepseek-ai/dsh-llm/brand'
 import type { SessionSeq } from '@deepseek-ai/dsh-session/types'
 import type {
-  ConversationLocationDataStore, ConversationTurnDataMap,
-  MessageImageLoader, MessageImagesOwnerProps, RenderMessageImages, TurnLocation,
+  CommandNode, CompactionSummaryNode, ConversationLocationDataStore, ConversationTurnDataMap,
+  MessageImageLoader, MessageImagesOwnerProps, RenderMessageImages, ToolCallBlock, TurnLocation,
 } from '@deepseek-ai/dsh-client-ui-conversation/client'
 import type {
   InjectFace, KeyedSnapshotSelectorHook, PropsLocale, PropsRenderSlots, PropsRuntime, PropsStore,
@@ -16,8 +16,7 @@ import type { createChatStore } from '../stores.ts'
 import type { ToolCallId, SelectionTarget } from './store.ts'
 import type { ChatConversationViewNode, ChatNode, ChatNodeKind } from './chat-nodes.ts'
 import type {
-  ChatNodeProcessSource, ChatNodeSource, ChatSnapshot, ChatTurnProcessPresentation, CommandNode,
-  CompactionSummaryNode, ToolCallBlock,
+  ChatNodeProcessSource, ChatNodeSource, ChatSnapshot, ChatTurnProcessPresentation,
 } from './snapshot.ts'
 import type { TurnProcessSpec } from './turn-process.ts'
 import type { TranscriptViewMode } from '../../chat-settings.ts'
diff --git a/packages/client/ui-chat/src/client/contract/turn-metrics.ts b/packages/client/ui-chat/src/client/contract/turn-metrics.ts
index 2f8f0eabbc..5880a92af5 100644
--- a/packages/client/ui-chat/src/client/contract/turn-metrics.ts
+++ b/packages/client/ui-chat/src/client/contract/turn-metrics.ts
@@ -1,6 +1,8 @@
 // Latency/throughput folds shared by the settled turn footer and StatsLine.
 
-import type { AssistantMessageNode, ConversationNode } from './snapshot.ts'
+import type {
+  AssistantMessageNode, ConversationNode,
+} from '@deepseek-ai/dsh-client-ui-conversation/client'
 
 /** Latency and decode-throughput readings for one turn's footer. */
 export interface TurnMetrics {
diff --git a/packages/client/ui-chat/src/client/conversation-nodes/assistant.ts b/packages/client/ui-chat/src/client/conversation-nodes/assistant.ts
index 0b23226cde..02dd7168df 100644
--- a/packages/client/ui-chat/src/client/conversation-nodes/assistant.ts
+++ b/packages/client/ui-chat/src/client/conversation-nodes/assistant.ts
@@ -1,12 +1,12 @@
 import type { Context } from '@deepseek-ai/cordis'
 import type { ChunkRowEvent } from '@deepseek-ai/dsh-api-session-controller/types'
 import type {
-  ConversationLocation, ConversationMatch, ConversationNodeContext, ConversationNodeDefinition,
+  AssistantBlock, AssistantMessageNode, ConversationLocation, ConversationMatch,
+  ConversationNodeContext, ConversationNodeDefinition,
 } from '@deepseek-ai/dsh-client-ui-conversation/client'
 import type {} from '@deepseek-ai/dsh-llm-retry/types'
 import { isAppendSurfaceEvent } from '@deepseek-ai/dsh-session/surface'
 import type { AssistantChatData } from '../contract/chat-nodes.ts'
-import type { AssistantBlock, AssistantMessageNode } from '../contract/snapshot.ts'
 import { CHAT_SYNTHETIC_SEQ_OFFSETS, chatNode } from './common.ts'
 import {
   emptyAssistantBlock, isTokenDelta, toAssistantBlock, toAssistantBlocks,
diff --git a/packages/client/ui-chat/src/client/conversation-nodes/chat-snapshot-builder.ts b/packages/client/ui-chat/src/client/conversation-nodes/chat-snapshot-builder.ts
index 6fa7671da6..64d74f28d8 100644
--- a/packages/client/ui-chat/src/client/conversation-nodes/chat-snapshot-builder.ts
+++ b/packages/client/ui-chat/src/client/conversation-nodes/chat-snapshot-builder.ts
@@ -1,15 +1,14 @@
 import type { Context } from '@deepseek-ai/cordis'
 import { notifySubscribers } from '@deepseek-ai/dsh-client-store'
 import type {
-  ConversationLocation, ConversationTimelineSnapshot, ConversationViewBuilder,
-  ConversationViewDefinition,
+  ConversationLocation, ConversationNode, ConversationTimelineSnapshot, ConversationViewBuilder,
+  ConversationViewDefinition, PartialAssistant, RunningToolCall,
 } from '@deepseek-ai/dsh-client-ui-conversation/client'
 import type { ChatConversationViewNode, ChatNode } from '../contract/chat-nodes.ts'
 import { isRunningTool } from '../contract/chat-nodes.ts'
 import type {
   ChatLocationNodeIndex, ChatNodeProcessSource, ChatNodeSource, ChatNodeStore, ChatSnapshot,
-  ChatTurnNavigationIndex, ChatTurnProcessPresentation, ConversationNode, LegacyConversationSlice,
-  PartialAssistant, RunningToolCall, TurnNavigationItem,
+  ChatTurnNavigationIndex, ChatTurnProcessPresentation, LegacyConversationSlice, TurnNavigationItem,
 } from '../contract/snapshot.ts'
 import { TURN_PROCESS_INDEPENDENT_KINDS } from '../contract/turn-process.ts'
 import { sessionRecallLabels } from './event-projection.ts'
diff --git a/packages/client/ui-chat/src/client/conversation-nodes/command.ts b/packages/client/ui-chat/src/client/conversation-nodes/command.ts
index b4723d78fa..e21f50c5f5 100644
--- a/packages/client/ui-chat/src/client/conversation-nodes/command.ts
+++ b/packages/client/ui-chat/src/client/conversation-nodes/command.ts
@@ -1,13 +1,12 @@
 import type { Context } from '@deepseek-ai/cordis'
 import type {
-  ConversationMatch, ConversationNodeContext, ConversationNodeDefinition,
+  CommandNode, CompactionSummaryNode, ConversationMatch, ConversationNodeContext, ConversationNodeDefinition,
 } from '@deepseek-ai/dsh-client-ui-conversation/client'
 import type { CompactionCheckpointSource } from '@deepseek-ai/dsh-compaction/checkpoint'
 import type {} from '@deepseek-ai/dsh-compaction/types'
 import type {} from '@deepseek-ai/dsh-commands/types'
 import { isReplacementSurfaceEvent } from '@deepseek-ai/dsh-session/surface'
 import type { ManualCompactionChatData } from '../contract/chat-nodes.ts'
-import type { CommandNode, CompactionSummaryNode } from '../contract/snapshot.ts'
 import { chatNode } from './common.ts'
 
 declare module '../contract/chat-nodes.ts' {
diff --git a/packages/client/ui-chat/src/client/conversation-nodes/compaction.ts b/packages/client/ui-chat/src/client/conversation-nodes/compaction.ts
index 5874c7bd61..9612f08741 100644
--- a/packages/client/ui-chat/src/client/conversation-nodes/compaction.ts
+++ b/packages/client/ui-chat/src/client/conversation-nodes/compaction.ts
@@ -1,9 +1,8 @@
 import type { Context } from '@deepseek-ai/cordis'
 import type {
-  ConversationMatch, ConversationNodeContext, ConversationNodeDefinition,
+  CompactionSummaryNode, ConversationMatch, ConversationNodeContext, ConversationNodeDefinition,
 } from '@deepseek-ai/dsh-client-ui-conversation/client'
 import type {} from '@deepseek-ai/dsh-compaction/types'
-import type { CompactionSummaryNode } from '../contract/snapshot.ts'
 import { chatNode } from './common.ts'
 import { compactSource, compactSummary, updateCompactionState } from './command.ts'
 
diff --git a/packages/client/ui-chat/src/client/conversation-nodes/fallback.ts b/packages/client/ui-chat/src/client/conversation-nodes/fallback.ts
index 5c5a77c82c..33cc5129a5 100644
--- a/packages/client/ui-chat/src/client/conversation-nodes/fallback.ts
+++ b/packages/client/ui-chat/src/client/conversation-nodes/fallback.ts
@@ -1,7 +1,8 @@
 import type { Context } from '@deepseek-ai/cordis'
-import type { ConversationNodeDefinition } from '@deepseek-ai/dsh-client-ui-conversation/client'
+import type {
+  ConversationNodeDefinition, UnknownSurfaceNode,
+} from '@deepseek-ai/dsh-client-ui-conversation/client'
 import { isAppendSurfaceEvent } from '@deepseek-ai/dsh-session/surface'
-import type { UnknownSurfaceNode } from '../contract/snapshot.ts'
 import { chatNode } from './common.ts'
 
 declare module '../contract/chat-nodes.ts' {
diff --git a/packages/client/ui-chat/src/client/conversation-nodes/message.ts b/packages/client/ui-chat/src/client/conversation-nodes/message.ts
index 1927a468c5..792eab2f1c 100644
--- a/packages/client/ui-chat/src/client/conversation-nodes/message.ts
+++ b/packages/client/ui-chat/src/client/conversation-nodes/message.ts
@@ -1,7 +1,8 @@
 import type { Context } from '@deepseek-ai/cordis'
-import type { ConversationNodeDefinition } from '@deepseek-ai/dsh-client-ui-conversation/client'
+import type {
+  ContextMessageNode, ConversationNodeDefinition, SteeringMessageNode, UserMessageNode,
+} from '@deepseek-ai/dsh-client-ui-conversation/client'
 import { isAppendSurfaceEvent, isReplacementSurfaceEvent } from '@deepseek-ai/dsh-session/surface'
-import type { ContextMessageNode, SteeringMessageNode, UserMessageNode } from '../contract/snapshot.ts'
 import type { InboxState } from './inbox.ts'
 import { chatNode } from './common.ts'
 import { contextForm, contextProvenance } from './event-projection.ts'
diff --git a/packages/client/ui-chat/src/client/conversation-nodes/partial.ts b/packages/client/ui-chat/src/client/conversation-nodes/partial.ts
index ea52a3a565..9761ac93cd 100644
--- a/packages/client/ui-chat/src/client/conversation-nodes/partial.ts
+++ b/packages/client/ui-chat/src/client/conversation-nodes/partial.ts
@@ -1,5 +1,7 @@
 import type { StreamChunk } from '@deepseek-ai/dsh-llm/types'
-import type { AssistantBlock, PartialAssistant } from '../contract/snapshot.ts'
+import type {
+  AssistantBlock, PartialAssistant,
+} from '@deepseek-ai/dsh-client-ui-conversation/client'
 import { emptyAssistantBlock, toAssistantBlock } from './event-projection.ts'
 
 /**
diff --git a/packages/client/ui-chat/src/client/conversation-nodes/retry.ts b/packages/client/ui-chat/src/client/conversation-nodes/retry.ts
index eeaf8d461b..d721821f22 100644
--- a/packages/client/ui-chat/src/client/conversation-nodes/retry.ts
+++ b/packages/client/ui-chat/src/client/conversation-nodes/retry.ts
@@ -1,10 +1,9 @@
 import type { Context } from '@deepseek-ai/cordis'
 import type {
-  ConversationLocation, ConversationMatch, ConversationNodeDefinition,
+  ConversationLocation, ConversationMatch, ConversationNodeDefinition, ModelRetryNode,
 } from '@deepseek-ai/dsh-client-ui-conversation/client'
 import type {} from '@deepseek-ai/dsh-llm-retry/types'
 import type { RetryChatData } from '../contract/chat-nodes.ts'
-import type { ModelRetryNode } from '../contract/snapshot.ts'
 import { chatNode } from './common.ts'
 
 declare module '../contract/chat-nodes.ts' {
diff --git a/packages/client/ui-chat/src/client/conversation-nodes/tool.ts b/packages/client/ui-chat/src/client/conversation-nodes/tool.ts
index b1f675c4e4..acfcb4bca8 100644
--- a/packages/client/ui-chat/src/client/conversation-nodes/tool.ts
+++ b/packages/client/ui-chat/src/client/conversation-nodes/tool.ts
@@ -1,11 +1,11 @@
 import type { Context } from '@deepseek-ai/cordis'
 import type {
-  ConversationMatch, ConversationNodeContext, ConversationNodeDefinition,
+  ConversationMatch, ConversationNodeContext, ConversationNodeDefinition, RunningToolCall,
+  ToolCallBlock, ToolResultNode,
 } from '@deepseek-ai/dsh-client-ui-conversation/client'
 import { isAppendSurfaceEvent } from '@deepseek-ai/dsh-session/surface'
 import type {} from '@deepseek-ai/dsh-tools/types'
 import type { ToolChatData } from '../contract/chat-nodes.ts'
-import type { RunningToolCall, ToolCallBlock, ToolResultNode } from '../contract/snapshot.ts'
 import { CHAT_SYNTHETIC_SEQ_OFFSETS, chatNode } from './common.ts'
 
 declare module '../contract/chat-nodes.ts' {
diff --git a/packages/client/ui-chat/src/client/conversation-nodes/turn-error.ts b/packages/client/ui-chat/src/client/conversation-nodes/turn-error.ts
index e3b41095ce..941f23ac43 100644
--- a/packages/client/ui-chat/src/client/conversation-nodes/turn-error.ts
+++ b/packages/client/ui-chat/src/client/conversation-nodes/turn-error.ts
@@ -1,8 +1,7 @@
 import type { Context } from '@deepseek-ai/cordis'
 import type {
-  ConversationMatch, ConversationNodeContext, ConversationNodeDefinition,
+  ConversationMatch, ConversationNodeContext, ConversationNodeDefinition, TurnErrorNode,
 } from '@deepseek-ai/dsh-client-ui-conversation/client'
-import type { TurnErrorNode } from '../contract/snapshot.ts'
 import { chatNode } from './common.ts'
 import { displayFailure } from './event-projection.ts'
 
diff --git a/packages/client/ui-chat/src/client/conversation-nodes/turn-max-tokens.ts b/packages/client/ui-chat/src/client/conversation-nodes/turn-max-tokens.ts
index 31508ab77c..746d00bc95 100644
--- a/packages/client/ui-chat/src/client/conversation-nodes/turn-max-tokens.ts
+++ b/packages/client/ui-chat/src/client/conversation-nodes/turn-max-tokens.ts
@@ -1,8 +1,7 @@
 import type { Context } from '@deepseek-ai/cordis'
 import type {
-  ConversationMatch, ConversationNodeContext, ConversationNodeDefinition,
+  ConversationMatch, ConversationNodeContext, ConversationNodeDefinition, TurnMaxTokensNode,
 } from '@deepseek-ai/dsh-client-ui-conversation/client'
-import type { TurnMaxTokensNode } from '../contract/snapshot.ts'
 import { CHAT_SYNTHETIC_SEQ_OFFSETS, chatNode } from './common.ts'
 
 declare module '../contract/chat-nodes.ts' {
diff --git a/packages/client/ui-chat/src/client/model/conversation-context.ts b/packages/client/ui-chat/src/client/model/conversation-context.ts
index 7f8116ffcc..442c455435 100644
--- a/packages/client/ui-chat/src/client/model/conversation-context.ts
+++ b/packages/client/ui-chat/src/client/model/conversation-context.ts
@@ -1,5 +1,6 @@
-import type { ConversationNode } from '../contract/snapshot.ts'
-import type { ConversationPromptSnapshot } from '@deepseek-ai/dsh-client-ui-conversation/client'
+import type {
+  ConversationNode, ConversationPromptSnapshot,
+} from '@deepseek-ai/dsh-client-ui-conversation/client'
 
 /** Operation that started a new append-only model context. */
 export type ConversationContextOriginKind = 'compaction' | 'rewind' | 'rewrite'
diff --git a/packages/client/ui-chat/src/client/model/tool-call-tree.ts b/packages/client/ui-chat/src/client/model/tool-call-tree.ts
index ce311f5291..878a78e63a 100644
--- a/packages/client/ui-chat/src/client/model/tool-call-tree.ts
+++ b/packages/client/ui-chat/src/client/model/tool-call-tree.ts
@@ -2,7 +2,7 @@ import type { SessionEvent } from '@deepseek-ai/dsh-session/types'
 import type {} from '@deepseek-ai/dsh-tools/types'
 import type {
   ConversationNode, RunningToolCall, ToolCallBlock, ToolResultNode,
-} from '../contract/snapshot.ts'
+} from '@deepseek-ai/dsh-client-ui-conversation/client'
 
 interface ProjectedBlock {
   source: ToolCallBlock
diff --git a/packages/extensions/cordis-client-runner/src/client/api-catalog.ts b/packages/extensions/cordis-client-runner/src/client/api-catalog.ts
index b3e525a561..1e08d7b349 100644
--- a/packages/extensions/cordis-client-runner/src/client/api-catalog.ts
+++ b/packages/extensions/cordis-client-runner/src/client/api-catalog.ts
@@ -433,22 +433,6 @@ export const TYPE_API: readonly TypeApiEntry[] = [
     name: 'AgentContext',
     declaration: 'export type AgentContext = Omit<Context, \'remote\'> & {\n    readonly remote: ClientRemote & TypertRemoteScopeApi<\'agent\'>;\n};',
   },
-  {
-    name: 'BackgroundUploadProgress',
-    declaration: 'export interface BackgroundUploadProgress {\n    readonly loaded: number;\n    readonly total?: number;\n}',
-  },
-  {
-    name: 'BackgroundUploadRequest',
-    declaration: 'export interface BackgroundUploadRequest {\n    readonly path: string;\n    readonly body: Blob;\n    readonly headers?: Readonly<Record<string, string>>;\n    readonly signal?: AbortSignal;\n    readonly onProgress?: (progress: BackgroundUploadProgress) => void;\n}',
-  },
-  {
-    name: 'BackgroundUploadResponse',
-    declaration: 'export interface BackgroundUploadResponse {\n    readonly status: number;\n    readonly body: string;\n}',
-  },
-  {
-    name: 'BackgroundUploadTransport',
-    declaration: 'export interface BackgroundUploadTransport {\n    post(request: BackgroundUploadRequest): Promise<BackgroundUploadResponse>;\n}',
-  },
   {
     name: 'BakedActions',
     declaration: 'export type BakedActions<T, A extends ActionsDecl<T>> = {\n    [K in keyof A]: A[K] extends (draft: T, ...params: infer P) => void ? (...params: P) => void : never;\n};',
@@ -515,7 +499,7 @@ export const TYPE_API: readonly TypeApiEntry[] = [
   },
   {
     name: 'ConnectionHandle',
-    declaration: 'export interface ConnectionHandle {\n    readonly isLoopback: boolean;\n    readonly generation: ConnectionGenerationState;\n    readonly state: ConnectionStateSource;\n    readonly rpc: ClientConnectionRpc;\n    readonly backgroundUploads?: BackgroundUploadTransport;\n    reconnect(): void;\n    registerGenerationSource(source: ConnectionGenerationSource): () => void;\n    start(sinks: ConnectionSinks, config?: ConnectionConfig): ConnectionLoop;\n}',
+    declaration: 'export interface ConnectionHandle {\n    readonly isLoopback: boolean;\n    readonly generation: ConnectionGenerationState;\n    readonly state: ConnectionStateSource;\n    readonly rpc: ClientConnectionRpc;\n    reconnect(): void;\n    registerGenerationSource(source: ConnectionGenerationSource): () => void;\n    start(sinks: ConnectionSinks, config?: ConnectionConfig): ConnectionLoop;\n}',
   },
   {
     name: 'ConnectionHostInfo',
@@ -579,7 +563,7 @@ export const TYPE_API: readonly TypeApiEntry[] = [
   },
   {
     name: 'ISession',
-    declaration: 'export interface ISession {\n    readonly sessionId: SessionId;\n    readonly projections: ProjectionsFace;\n    beginSubmission(input: BeginSubmissionInput): SubmissionHandle;\n    prompt(content: PromptContentPart[], mode: \'queue\' | \'steer\', signal?: AbortSignal, requestId?: SessionRequestId): Promise<RemoteResult<{\n        accepted: true;\n    }>>;\n    uploadFile(data: Blob | Uint8Array, name?: string, signal?: AbortSignal, onProgress?: (progress: {\n        readonly loaded: number;\n        readonly total?: number;\n    }) => void): Promise<RemoteResult<{\n        receiptId: FileUploadReceiptId;\n        file: FileAttachmentRef;\n    }>>;\n    readAttachment(attachmentId: AttachmentIdType): Promise<RemoteResult<{\n        attachment: ImageAttachmentRef;\n        data: Uint8Array;\n    }>>;\n    updateQueue(itemId: MessageId, action: QueueAction): Promise<RemoteResult<{\n        accepted: true;\n    }>>;\n    cancel(): Promise<RemoteResult<{\n        accepted: true;\n    }>>;\n    rename(title: string): Promise<RemoteResult<{\n        title: string;\n        seq: SessionSeq;\n    }>>;\n    loadOlder(): Promise<void>;\n    loadThrough(seq: SessionSeq): Promise<void>;\n    command(line: string): Promise<RemoteResult<{\n        matched: boolean;\n    }>>;\n}',
+    declaration: 'export interface ISession {\n    readonly sessionId: SessionId;\n    readonly projections: ProjectionsFace;\n    beginSubmission(input: BeginSubmissionInput): SubmissionHandle;\n    prompt(content: PromptContentPart[], mode: \'queue\' | \'steer\', signal?: AbortSignal, requestId?: SessionRequestId): Promise<RemoteResult<{\n        accepted: true;\n    }>>;\n    uploadFile(data: Blob | Uint8Array | ReadableStream<Uint8Array>, name?: string, signal?: AbortSignal, onProgress?: (progress: {\n        readonly loaded: number;\n        readonly total?: number;\n    }) => void): Promise<RemoteResult<{\n        receiptId: FileUploadReceiptId;\n        file: FileAttachmentRef;\n    }>>;\n    readAttachment(attachmentId: AttachmentIdType): Promise<RemoteResult<{\n        attachment: ImageAttachmentRef;\n        data: Uint8Array;\n    }>>;\n    updateQueue(itemId: MessageId, action: QueueAction): Promise<RemoteResult<{\n        accepted: true;\n    }>>;\n    cancel(): Promise<RemoteResult<{\n        accepted: true;\n    }>>;\n    rename(title: string): Promise<RemoteResult<{\n        title: string;\n        seq: SessionSeq;\n    }>>;\n    loadOlder(): Promise<void>;\n    loadThrough(seq: SessionSeq): Promise<void>;\n    command(line: string): Promise<RemoteResult<{\n        matched: boolean;\n    }>>;\n}',
   },
   {
     name: 'KeyedHooksSources',
@@ -651,12 +635,20 @@ export const TYPE_API: readonly TypeApiEntry[] = [
   },
   {
     name: 'PendingSubmissionAttachment',
-    declaration: 'export type PendingSubmissionAttachment = ({\n    readonly type: \'image\';\n} & PendingSubmissionImage) | {\n    readonly type: \'file\';\n    readonly attachment: FileAttachmentRef;\n};',
+    declaration: 'export type PendingSubmissionAttachment = PendingSubmissionImageAttachment | PendingSubmissionFileAttachment;',
+  },
+  {
+    name: 'PendingSubmissionFileAttachment',
+    declaration: 'export interface PendingSubmissionFileAttachment {\n    readonly type: \'file\';\n    readonly value: FileAttachmentRef;\n}',
   },
   {
     name: 'PendingSubmissionImage',
     declaration: 'export interface PendingSubmissionImage {\n    readonly previewUrl: string;\n    readonly name?: string;\n    readonly width?: number;\n    readonly height?: number;\n}',
   },
+  {
+    name: 'PendingSubmissionImageAttachment',
+    declaration: 'export interface PendingSubmissionImageAttachment {\n    readonly type: \'image\';\n    readonly value: PendingSubmissionImage;\n}',
+  },
   {
     name: 'PendingSubmissionPlacement',
     declaration: 'export type PendingSubmissionPlacement = \'transcript\' | \'queued\' | \'steering\';',
diff --git a/scripts/verify-package-readme-model-experience.ts b/scripts/verify-package-readme-model-experience.ts
index 565693d35f..f514ba8c7e 100644
--- a/scripts/verify-package-readme-model-experience.ts
+++ b/scripts/verify-package-readme-model-experience.ts
@@ -78,6 +78,7 @@ const SENTENCE_MODEL_EXPERIENCE: Readonly<Record<string, SentenceContract>> = {
   'packages/client/ui-renderer': { kind: 'none', reason: 'Browser-side render assembly; registers nothing model-facing.' },
   'packages/client/ui-session': { kind: 'none', reason: 'Browser-side Session adapter; registers nothing model-facing.' },
   'packages/client/connection': { kind: 'none', reason: 'Browser-side UI plugin layer; registers nothing model-facing.' },
+  'packages/client/file-upload': { kind: 'none', reason: 'Browser-side request-body transport; registers nothing model-facing.' },
   'packages/api/remotes': { kind: 'none', reason: 'The Remote BFF selects business methods and forwarded events; selected services own any model-visible effect.' },
   'packages/experimental/agent-team-web-profile': { kind: 'indirect', reason: 'The private Web layer delegates model composition to the Host-side Agent Teams profile.' },
   'packages/experimental/client-ui-agent-team': { kind: 'none', reason: 'The browser projection and task controls register no model-facing input.' },