Implement crash-safe streaming worker runtime

web/src/api/contracts.ts

@@ -113,6 +113,8 @@ export interface AttemptRuntimeFailureDto {
 
 export interface ResultDescriptorDto {
   kind: 'manifest'
+  manifest_id: OpaqueIdDto
+  schema_version: number
   manifest: ObjectIdentityDto
   member_count: number
   total_bytes: number
@@ -124,6 +126,7 @@ export interface ObjectIdentityDto {
   key: string
   version_id?: string
   checksum: string
+  size: number
 }
 
 export interface JobPhaseProjectionDto {

web/src/api/decode.ts

@@ -277,10 +277,19 @@ function decodeEventProgress(value: unknown): EventProgressDto {
 
 function decodeResult(value: unknown): ResultDescriptorDto {
   const object = record(value)
-  exactKeys(object, ['kind', 'manifest', 'member_count', 'total_bytes'])
+  exactKeys(object, [
+    'kind',
+    'manifest_id',
+    'schema_version',
+    'manifest',
+    'member_count',
+    'total_bytes',
+  ])
   if (object.kind !== 'manifest') throw new Error('unknown result kind')
   return {
     kind: 'manifest',
+    manifest_id: opaqueId(string(object.manifest_id)),
+    schema_version: positiveInteger(object.schema_version),
     manifest: decodeObjectIdentity(object.manifest),
     member_count: positiveInteger(object.member_count),
     total_bytes: nonnegativeInteger(object.total_bytes),
@@ -289,7 +298,14 @@ function decodeResult(value: unknown): ResultDescriptorDto {
 
 function decodeObjectIdentity(value: unknown): ObjectIdentityDto {
   const object = record(value)
-  exactKeys(object, ['store', 'bucket', 'key', 'version_id', 'checksum'])
+  exactKeys(object, [
+    'store',
+    'bucket',
+    'key',
+    'version_id',
+    'checksum',
+    'size',
+  ])
   return {
     store: string(object.store),
     bucket: string(object.bucket),
@@ -298,6 +314,7 @@ function decodeObjectIdentity(value: unknown): ObjectIdentityDto {
       ? {}
       : { version_id: string(object.version_id) }),
     checksum: string(object.checksum),
+    size: nonnegativeInteger(object.size),
   }
 }