fix(core): remove per-prompt system option (#34361)

packages/schema/src/prompt-input.ts

@@ -23,5 +23,4 @@ export const Prompt = Schema.Struct({
   text: Schema.String,
   files: Schema.Array(FileAttachment).pipe(optional),
   agents: Schema.Array(AgentAttachment).pipe(optional),
-  system: Schema.String.pipe(optional),
 }).annotate({ identifier: "PromptInput" })

packages/schema/src/prompt.ts

@@ -42,18 +42,16 @@ export const Prompt = Schema.Struct({
   text: Schema.String,
   files: Schema.Array(FileAttachment).pipe(optional),
   agents: Schema.Array(AgentAttachment).pipe(optional),
-  system: Schema.String.pipe(optional),
 })
   .annotate({ identifier: "Prompt" })
   .pipe(
     statics((schema) => ({
       equivalence: Schema.toEquivalence(schema),
-      fromUserMessage: (input: Pick<Prompt, "text" | "files" | "agents" | "system">) =>
+      fromUserMessage: (input: Pick<Prompt, "text" | "files" | "agents">) =>
         schema.make({
           text: input.text,
           ...(input.files === undefined ? {} : { files: input.files }),
           ...(input.agents === undefined ? {} : { agents: input.agents }),
-          ...(input.system === undefined ? {} : { system: input.system }),
         }),
     })),
   )

packages/schema/src/session-message.ts

@@ -47,7 +47,6 @@ export const User = Schema.Struct({
   text: Prompt.fields.text,
   files: Prompt.fields.files,
   agents: Prompt.fields.agents,
-  system: Prompt.fields.system,
   type: Schema.Literal("user"),
 }).annotate({ identifier: "Session.Message.User" })