feat(attachment): add ordered image batch admission

packages/host/apiproxy/src/api-proxy.ts

@@ -145,36 +145,25 @@ async function durablePromptContent(ctx: Context, content: readonly PromptConten
   if (content.every(part => part.type === 'text')) {
     return content.map(part => ({ type: 'text', text: part.text }))
   }
-  const limits = ctx.attachments.imageLimits
-  if (content.filter(part => part.type === 'image').length > limits.maxImagesPerMessage) {
-    throw new AttachmentError('Prompt exceeds the configured image-count limit.', 'TOO_MANY_IMAGES')
-  }
   const prepared = content.map(part => part.type === 'text'
     ? part
     : { part, data: decodeBase64(part.data) })
   const images = prepared.filter((part): part is Extract<typeof part, { data: Uint8Array }> => 'data' in part)
-  const totalBytes = images.reduce((sum, image) => sum + image.data.byteLength, 0)
-  if (totalBytes > limits.maxMessageImageBytes) {
-    throw new AttachmentError('Prompt exceeds the configured aggregate image-byte limit.', 'IMAGES_TOO_LARGE')
-  }
-  for (const image of images) {
-    await ctx.attachments.validateImage({
-      data: image.data,
-      mediaType: image.part.mediaType,
-      ...image.part.name === undefined ? {} : { name: image.part.name },
-    })
-  }
+  const refs = await ctx.attachments.saveImages(images.map(image => ({
+    data: image.data,
+    mediaType: image.part.mediaType,
+    ...image.part.name === undefined ? {} : { name: image.part.name },
+  })))
   const blocks: ContentBlock[] = []
+  let imageIndex = 0
   for (const item of prepared) {
     if (!('data' in item)) {
       blocks.push({ type: 'text', text: item.text })
       continue
     }
-    const attachment = await ctx.attachments.saveImage({
-      data: item.data,
-      mediaType: item.part.mediaType,
-      ...item.part.name === undefined ? {} : { name: item.part.name },
-    })
+    const attachment = refs[imageIndex++]
+    /* v8 ignore next -- each prepared image supplied exactly one saveImages input and therefore one ordered ref. */
+    if (attachment === undefined) throw new Error('attachment batch result did not preserve input cardinality')
     blocks.push({ type: 'image', attachment })
   }
   return blocks

packages/host/apiproxy/tests/api-proxy-models.spec.ts

@@ -9,6 +9,7 @@ import { describe, expect, it, vi } from 'vitest'
 import { Context } from '@deepseek-ai/cordis'
 import AgentRegistry, { agentEvents } from '@deepseek-ai/dsh-agent'
 import type { Agent } from '@deepseek-ai/dsh-agent'
+import AttachmentStore from '@deepseek-ai/dsh-attachment'
 import LlmService, { LlmAdapter, ReasoningEffortId } from '@deepseek-ai/dsh-llm'
 import type {
   GenerateOptions, LlmCallConfig, LlmModelInfo, LlmModelReasoningInfo, LlmProviderInfo,
@@ -140,7 +141,7 @@ describe('Web session model selection', () => {
       height: 1,
       ...input.name === undefined ? {} : { name: input.name },
     }))
-    ctx.provide('attachments', {
+    const attachments = {
       imageLimits: {
         maxImageBytes: 4,
         maxImagesPerMessage: 2,
@@ -150,6 +151,12 @@ describe('Web session model selection', () => {
       },
       validateImage,
       saveImage,
+    }
+    ctx.provide('attachments', {
+      ...attachments,
+      saveImages(inputs: readonly Parameters<typeof saveImage>[0][]) {
+        return AttachmentStore.prototype.saveImages.call(attachments, inputs)
+      },
     } as never)
     const followup = vi.fn()
     Object.assign(agent, { followup })