refactor(schema): apply session review decisions (#35793)

packages/schema/src/session.ts

@@ -9,34 +9,31 @@ import { DateTimeUtcFromMillis, optional, RelativePath } from "./schema.js"
 import { SessionEvent } from "./session-event.js"
 import { SessionID } from "./session-id.js"
 import { SessionMessage } from "./session-message.js"
-import { Revert } from "./revert.js"
+import { Money } from "./money.js"
+import { TokenUsage } from "./token-usage.js"
+import { Revert } from "./session-revert.js"
 
 export const ID = SessionID
 export type ID = SessionID
 
 export const Event = SessionEvent
 
+export { Revert }
+
 export interface Info extends Schema.Schema.Type<typeof Info> {}
 export const Info = Schema.Struct({
   id: ID,
   parentID: ID.pipe(optional),
   fork: Schema.Struct({
     sessionID: ID,
+    /** Messages before this exclusive boundary are copied into the fork. */
     messageID: SessionMessage.ID.pipe(optional),
   }).pipe(optional),
   projectID: Project.ID,
   agent: Agent.ID.pipe(optional),
   model: Model.Ref.pipe(optional),
-  cost: Schema.Finite,
-  tokens: Schema.Struct({
-    input: Schema.Finite,
-    output: Schema.Finite,
-    reasoning: Schema.Finite,
-    cache: Schema.Struct({
-      read: Schema.Finite,
-      write: Schema.Finite,
-    }),
-  }),
+  cost: Money.USD,
+  tokens: TokenUsage.Info,
   time: Schema.Struct({
     created: DateTimeUtcFromMillis,
     updated: DateTimeUtcFromMillis,
@@ -45,8 +42,8 @@ export const Info = Schema.Struct({
   title: Schema.String,
   location: Location.Ref,
   subpath: RelativePath.pipe(optional),
-  revert: Revert.State.pipe(optional),
-}).annotate({ identifier: "SessionV2.Info" })
+  revert: Revert.pipe(optional),
+}).annotate({ identifier: "Session.Info" })
 
 export const ListAnchor = Schema.Struct({
   id: ID,