fix(opencode): show bash commands instead of repeating their output

apps/server/src/provider/Layers/OpenCodeAdapter.test.ts

@@ -1150,6 +1150,87 @@ it.layer(OpenCodeAdapterTestLayer)("OpenCodeAdapterLive", (it) => {
     }),
   );
 
+  it.effect("projects bash tool parts as command plus raw output instead of output-as-detail", () =>
+    Effect.gen(function* () {
+      const adapter = yield* OpenCodeAdapter;
+      const threadId = asThreadId("thread-opencode-bash-projection");
+      const part = {
+        id: "part-bash",
+        callID: "call-bash",
+        sessionID: "http://127.0.0.1:9999/session",
+        messageID: "msg-bash",
+        type: "tool" as const,
+        tool: "bash",
+        state: {
+          status: "running" as const,
+          input: { command: "git status" },
+          title: "git status",
+          time: { start: 1 },
+        },
+      };
+      runtimeMock.state.subscribedEvents = [
+        {
+          type: "message.part.updated",
+          properties: { sessionID: part.sessionID, part, time: 1 },
+        },
+        {
+          type: "message.part.updated",
+          properties: {
+            sessionID: part.sessionID,
+            part: {
+              ...part,
+              state: {
+                status: "completed" as const,
+                input: { command: "git status" },
+                title: "git status",
+                output: "On branch main\nnothing to commit\n",
+                time: { start: 1, end: 2 },
+              },
+            },
+            time: 2,
+          },
+        },
+      ];
+      const eventsFiber = yield* adapter.streamEvents.pipe(
+        Stream.filter(
+          (event) =>
+            event.threadId === threadId &&
+            (event.type === "item.updated" || event.type === "item.completed"),
+        ),
+        Stream.take(2),
+        Stream.runCollect,
+        Effect.forkChild,
+      );
+
+      yield* adapter.startSession({
+        provider: ProviderDriverKind.make("opencode"),
+        threadId,
+        runtimeMode: "full-access",
+      });
+
+      const events = Array.from(yield* Fiber.join(eventsFiber).pipe(Effect.timeout("1 second")));
+      NodeAssert.equal(events.length, 2);
+      const updated = events[0];
+      const completed = events[1];
+      if (updated?.type !== "item.updated" || completed?.type !== "item.completed") {
+        NodeAssert.fail(`unexpected events: ${events.map((event) => event.type).join(", ")}`);
+      }
+      // The command itself is the detail/preview; the output rides in
+      // data.rawOutput so clients render it once in the expanded body.
+      NodeAssert.equal(updated.payload.detail, "git status");
+      NodeAssert.deepEqual(
+        (updated.payload.data as Record<string, unknown>).command,
+        "git status",
+      );
+      NodeAssert.equal(completed.payload.detail, "git status");
+      NodeAssert.deepEqual(completed.payload.data, {
+        tool: "bash",
+        command: "git status",
+        rawOutput: { content: "On branch main\nnothing to commit\n" },
+      });
+    }),
+  );
+
   it.effect("lets OpenCode own session title generation and emits title metadata updates", () =>
     Effect.gen(function* () {
       const adapter = yield* OpenCodeAdapter;

apps/server/src/provider/Layers/OpenCodeAdapter.ts

@@ -492,6 +492,16 @@ function messageRoleForPart(
   return part.type === "tool" ? "assistant" : undefined;
 }
 
+// OpenCode carries a bash invocation at `state.input.command`; project it
+// into the command/rawOutput shape every client already renders (mirrors
+// Claude/Codex adapters). Without this, clients fall back to reading the
+// output in `detail` as the command (#7307).
+function commandFromToolInput(part: Extract<Part, { type: "tool" }>): string | undefined {
+  const input = (part.state as { input?: Record<string, unknown> }).input;
+  const command = typeof input?.command === "string" ? input.command.trim() : "";
+  return command || undefined;
+}
+
 function detailFromToolPart(part: Extract<Part, { type: "tool" }>): string | undefined {
   switch (part.state.status) {
     case "completed":
@@ -918,7 +928,9 @@ export function makeOpenCodeAdapter(
             const itemType = toToolLifecycleItemType(part.tool);
             const title =
               part.state.status === "running" ? (part.state.title ?? part.tool) : part.tool;
-            const detail = detailFromToolPart(part);
+            const command =
+              itemType === "command_execution" ? commandFromToolInput(part) : undefined;
+            const detail = command ?? detailFromToolPart(part);
             const payload = {
               itemType,
               ...(part.state.status === "error"
@@ -930,7 +942,14 @@ export function makeOpenCodeAdapter(
               ...(detail ? { detail } : {}),
               data: {
                 tool: part.tool,
-                state: part.state,
+                ...(command
+                  ? {
+                      command,
+                      ...(part.state.status === "completed"
+                        ? { rawOutput: { content: part.state.output } }
+                        : {}),
+                    }
+                  : {}),
               },
             };
             const runtimeEvent: ProviderRuntimeEvent = {

apps/web/src/session-logic.command-output.test.ts

@@ -82,4 +82,24 @@ describe("deriveWorkLogEntries command output", () => {
     expect(entry?.command).toBe("true");
     expect(entry?.detail).toBeUndefined();
   });
+
+  it("renders the OpenCode bash command as the preview and its output once", () => {
+    const [entry] = deriveWorkLogEntries([
+      makeCommandActivity("opencode-command", {
+        itemType: "command_execution",
+        title: "bash",
+        detail: "git status",
+        data: {
+          tool: "bash",
+          command: "git status",
+          rawOutput: { content: "On branch main\nnothing to commit" },
+        },
+      }),
+    ]);
+
+    expect(entry).toMatchObject({
+      command: "git status",
+      detail: "On branch main\nnothing to commit",
+    });
+  });
 });