diff --git a/packages/core/src/flag/flag.ts b/packages/core/src/flag/flag.ts
index f76d1aaf9d22..27243b15e711 100644
--- a/packages/core/src/flag/flag.ts
+++ b/packages/core/src/flag/flag.ts
@@ -82,6 +82,7 @@ export const Flag = {
   OPENCODE_SKIP_MIGRATIONS: truthy("OPENCODE_SKIP_MIGRATIONS"),
   OPENCODE_STRICT_CONFIG_DEPS: truthy("OPENCODE_STRICT_CONFIG_DEPS"),
 
+  OPENCODE_DISABLE_NOTIFICATIONS: truthy("OPENCODE_DISABLE_NOTIFICATIONS"),
   OPENCODE_WORKSPACE_ID: process.env["OPENCODE_WORKSPACE_ID"],
   OPENCODE_EXPERIMENTAL_WORKSPACES: OPENCODE_EXPERIMENTAL || truthy("OPENCODE_EXPERIMENTAL_WORKSPACES"),
   OPENCODE_EXPERIMENTAL_EVENT_SYSTEM: OPENCODE_EXPERIMENTAL || truthy("OPENCODE_EXPERIMENTAL_EVENT_SYSTEM"),
diff --git a/packages/opencode/src/cli/cmd/run.ts b/packages/opencode/src/cli/cmd/run.ts
index 7011b51eb90c..9a69085aeb53 100644
--- a/packages/opencode/src/cli/cmd/run.ts
+++ b/packages/opencode/src/cli/cmd/run.ts
@@ -21,6 +21,7 @@ import { Flag } from "@opencode-ai/core/flag/flag"
 import { ServerAuth } from "@/server/auth"
 import { EOL } from "os"
 import { Filesystem } from "@/util/filesystem"
+import { Notify } from "@/cli/notify"
 import { createOpencodeClient, type OpencodeClient, type ToolPart } from "@opencode-ai/sdk/v2"
 import { Agent } from "@/agent/agent"
 import { Permission } from "@/permission"
@@ -601,6 +602,9 @@ export const RunCommand = effectCmd({
         async function loop(client: OpencodeClient, events: Awaited<ReturnType<typeof sdk.event.subscribe>>) {
           const toggles = new Map<string, boolean>()
           let error: string | undefined
+          let lastOutput = ""
+          let agent = ""
+          let model = ""
 
           for await (const event of events.stream) {
             if (
@@ -610,8 +614,10 @@ export const RunCommand = effectCmd({
               args.format !== "json" &&
               toggles.get("start") !== true
             ) {
+              agent = event.properties.info.agent ?? ""
+              model = event.properties.info.modelID ?? ""
               UI.empty()
-              UI.println(`> ${event.properties.info.agent} · ${event.properties.info.modelID}`)
+              UI.println(`> ${agent} · ${model}`)
               UI.empty()
               toggles.set("start", true)
             }
@@ -653,6 +659,7 @@ export const RunCommand = effectCmd({
                 if (emit("text", { part })) continue
                 const text = part.text.trim()
                 if (!text) continue
+                lastOutput = text
                 if (!process.stdout.isTTY) {
                   process.stdout.write(text + EOL)
                   continue
@@ -694,6 +701,18 @@ export const RunCommand = effectCmd({
               event.properties.sessionID === sessionID &&
               event.properties.status.type === "idle"
             ) {
+              const prompt = message.slice(0, 100)
+              if (error) {
+                Notify.notify(prompt, `✗ ${error.slice(0, 200)}`)
+              } else if (lastOutput) {
+                const lines = lastOutput.split("\n").filter(Boolean).slice(0, 3)
+                const via = agent || model ? `${agent}${model ? ` (${model})` : ""}\n` : ""
+                const snippet = lines.join("\n").slice(0, 200)
+                Notify.notify(prompt, `${via}${snippet}`)
+              } else {
+                const via = agent || model ? `${agent}${model ? ` (${model})` : ""}` : ""
+                Notify.notify(prompt, via || "✓ done")
+              }
               break
             }
 
diff --git a/packages/opencode/src/cli/cmd/tui/app.tsx b/packages/opencode/src/cli/cmd/tui/app.tsx
index d7f2cd14b0ee..648357148cb3 100644
--- a/packages/opencode/src/cli/cmd/tui/app.tsx
+++ b/packages/opencode/src/cli/cmd/tui/app.tsx
@@ -61,6 +61,7 @@ import { PromptRefProvider, usePromptRef } from "./context/prompt"
 import { TuiConfigProvider, useTuiConfig } from "./context/tui-config"
 import { TuiConfig } from "@/cli/cmd/tui/config/tui"
 import { TuiPluginRuntime } from "@/cli/cmd/tui/plugin/runtime"
+import { Notify } from "@/cli/notify"
 import { createTuiApi } from "@/cli/cmd/tui/plugin/api"
 import type { RouteMap } from "@/cli/cmd/tui/plugin/api"
 import { FormatError, FormatUnknownError } from "@/cli/error"
@@ -869,11 +870,18 @@ function App(props: { onSnapshot?: () => Promise<string[]> }) {
     }
   })
 
+  event.on("session.idle", (evt) => {
+    const session = sync.session.get(evt.properties.sessionID)
+    Notify.notify("OpenCode", session?.title ?? "Task complete")
+  })
+
   event.on("session.error", (evt) => {
     const error = evt.properties.error
     if (error && typeof error === "object" && error.name === "MessageAbortedError") return
     const message = errorMessage(error)
 
+    Notify.notifyError("OpenCode Error", message)
+
     toast.show({
       variant: "error",
       message,
diff --git a/packages/opencode/src/cli/notify.ts b/packages/opencode/src/cli/notify.ts
new file mode 100644
index 000000000000..8f88d580a0d0
--- /dev/null
+++ b/packages/opencode/src/cli/notify.ts
@@ -0,0 +1,20 @@
+import * as Process from "@/util/process"
+import { Flag } from "@opencode-ai/core/flag/flag"
+
+const noop = () => {}
+
+export const notify = Flag.OPENCODE_DISABLE_NOTIFICATIONS
+  ? noop
+  : (title: string, message?: string) => {
+      const { platform } = process
+      if (platform === "linux") {
+        Process.spawn(["notify-send", title, message ?? ""])
+      } else if (platform === "darwin") {
+        const msg = (message ?? "").replace(/"/g, '\\"')
+        Process.spawn(["osascript", "-e", `display notification "${msg}" with title "${title}"`])
+      }
+    }
+
+export const notifyError = notify
+
+export * as Notify from "./notify"