feat: pass mode into task tool (#1248)

packages/opencode/src/session/index.ts

@@ -370,6 +370,7 @@ export namespace Session {
     const l = log.clone().tag("session", input.sessionID)
     l.info("chatting")
 
+    const inputMode = input.mode ?? "build"
     const userMsg: MessageV2.Info = {
       id: input.messageID ?? Identifier.ascending("message"),
       role: "user",
@@ -494,7 +495,7 @@ export namespace Session {
         ]
       }),
     ).then((x) => x.flat())
-    if (input.mode === "plan")
+    if (inputMode === "plan")
       userParts.push({
         id: Identifier.ascending("part"),
         messageID: userMsg.id,
@@ -617,7 +618,7 @@ export namespace Session {
         .catch(() => {})
     }
 
-    const mode = await Mode.get(input.mode ?? "build")
+    const mode = await Mode.get(inputMode)
     let system = input.providerID === "anthropic" ? [PROMPT_ANTHROPIC_SPOOF.trim()] : []
     system.push(...(mode.prompt ? [mode.prompt] : SystemPrompt.provider(input.modelID)))
     system.push(...(await SystemPrompt.environment()))
@@ -630,6 +631,7 @@ export namespace Session {
       id: Identifier.ascending("message"),
       role: "assistant",
       system,
+      mode: inputMode,
       path: {
         cwd: app.path.cwd,
         root: app.path.root,
@@ -1122,6 +1124,7 @@ export namespace Session {
       role: "assistant",
       sessionID: input.sessionID,
       system,
+      mode: "build",
       path: {
         cwd: app.path.cwd,
         root: app.path.root,

packages/opencode/src/session/message-v2.ts

@@ -226,6 +226,7 @@ export namespace MessageV2 {
     system: z.string().array(),
     modelID: z.string(),
     providerID: z.string(),
+    mode: z.string(),
     path: z.object({
       cwd: z.string(),
       root: z.string(),
@@ -290,6 +291,7 @@ export namespace MessageV2 {
         modelID: v1.metadata.assistant!.modelID,
         providerID: v1.metadata.assistant!.providerID,
         system: v1.metadata.assistant!.system,
+        mode: "build",
         error: v1.metadata.error,
       }
       const parts = v1.parts.flatMap((part): Part[] => {