diff --git a/packages/opencode/src/cli/cmd/run.ts b/packages/opencode/src/cli/cmd/run.ts
index 63e57b21f..fe15a0bd0 100644
--- a/packages/opencode/src/cli/cmd/run.ts
+++ b/packages/opencode/src/cli/cmd/run.ts
@@ -172,8 +172,6 @@ export const RunCommand = cmd({
         parts: [
           {
             id: Identifier.ascending("part"),
-            sessionID: session.id,
-            messageID: messageID,
             type: "text",
             text: message,
           },
diff --git a/packages/opencode/src/session/index.ts b/packages/opencode/src/session/index.ts
index 2566dc348..2b358bec4 100644
--- a/packages/opencode/src/session/index.ts
+++ b/packages/opencode/src/session/index.ts
@@ -1136,8 +1136,6 @@ export namespace Session {
       parts: [
         {
           id: Identifier.ascending("part"),
-          sessionID: input.sessionID,
-          messageID: input.messageID,
           type: "text",
           text: PROMPT_INITIALIZE.replace("${path}", app.path.root),
         },
diff --git a/packages/opencode/src/tool/task.ts b/packages/opencode/src/tool/task.ts
index 49b89495f..c26ca7e54 100644
--- a/packages/opencode/src/tool/task.ts
+++ b/packages/opencode/src/tool/task.ts
@@ -44,8 +44,6 @@ export const TaskTool = Tool.define({
       parts: [
         {
           id: Identifier.ascending("part"),
-          messageID,
-          sessionID: session.id,
           type: "text",
           text: params.prompt,
         },