Validate prompt messages with Effect Schema (#26796)

packages/opencode/src/session/prompt.ts

@@ -65,6 +65,9 @@ import { SessionTable } from "./session.sql"
 // @ts-ignore
 globalThis.AI_SDK_LOG_WARNINGS = false
 
+const decodeMessageInfo = Schema.decodeUnknownExit(MessageV2.Info)
+const decodeMessagePart = Schema.decodeUnknownExit(MessageV2.Part)
+
 const STRUCTURED_OUTPUT_DESCRIPTION = `Use this tool to return your final response in the requested structured format.
 
 IMPORTANT:
@@ -1292,26 +1295,26 @@ NOTE: At any point in time through this workflow you should feel free to ask the
 
       const parts = resolvedParts
 
-      const parsed = MessageV2.Info.zod.safeParse(info)
-      if (!parsed.success) {
+      const parsed = decodeMessageInfo(info, { errors: "all", propertyOrder: "original" })
+      if (Exit.isFailure(parsed)) {
         log.error("invalid user message before save", {
           sessionID: input.sessionID,
           messageID: info.id,
           agent: info.agent,
           model: info.model,
-          issues: parsed.error.issues,
+          cause: Cause.pretty(parsed.cause),
         })
       }
       parts.forEach((part, index) => {
-        const p = MessageV2.Part.zod.safeParse(part)
-        if (p.success) return
+        const p = decodeMessagePart(part, { errors: "all", propertyOrder: "original" })
+        if (Exit.isSuccess(p)) return
         log.error("invalid user part before save", {
           sessionID: input.sessionID,
           messageID: info.id,
           partID: part.id,
           partType: part.type,
           index,
-          issues: p.error.issues,
+          cause: Cause.pretty(p.cause),
           part,
         })
       })