refactor(shell): centralize shell tool identity

Move shell tool ID checks behind shared helpers so runtime code and tests stop duplicating bash, pwsh, and powershell branches. This keeps shell-specific behavior aligned across consumers and makes follow-on shell changes less error-prone.

packages/app/e2e/prompt/prompt-history.spec.ts

@@ -1,20 +1,12 @@
-import type { ToolPart } from "@opencode-ai/sdk/v2/client"
 import type { Page } from "@playwright/test"
 import { test, expect } from "../fixtures"
 import { assistantText } from "../actions"
 import { promptSelector } from "../selectors"
-import { createSdk } from "../utils"
+import { createSdk, isShell } from "../utils"
 
 const text = (value: string | null) => (value ?? "").replace(/\u200B/g, "").trim()
 type Sdk = ReturnType<typeof createSdk>
 
-const isBash = (part: unknown): part is ToolPart => {
-  if (!part || typeof part !== "object") return false
-  if (!("type" in part) || part.type !== "tool") return false
-  if (!("tool" in part) || part.tool !== "bash") return false
-  return "state" in part
-}
-
 async function wait(page: Page, value: string) {
   await expect.poll(async () => text(await page.locator(promptSelector).textContent())).toBe(value)
 }
@@ -31,7 +23,7 @@ async function shell(sdk: Sdk, sessionID: string, cmd: string, token: string) {
         const part = messages
           .filter((item) => item.info.role === "assistant")
           .flatMap((item) => item.parts)
-          .filter(isBash)
+          .filter(isShell)
           .find((item) => item.state.input?.command === cmd && item.state.status === "completed")
 
         if (!part || part.state.status !== "completed") return

packages/app/e2e/prompt/prompt-shell.spec.ts

@@ -1,13 +1,6 @@
-import type { ToolPart } from "@opencode-ai/sdk/v2/client"
 import { test, expect } from "../fixtures"
 import { withSession } from "../actions"
-
-const isBash = (part: unknown): part is ToolPart => {
-  if (!part || typeof part !== "object") return false
-  if (!("type" in part) || part.type !== "tool") return false
-  if (!("tool" in part) || part.tool !== "bash") return false
-  return "state" in part
-}
+import { isShell } from "../utils"
 
 async function setAutoAccept(page: Parameters<typeof test>[0]["page"], enabled: boolean) {
   const button = page.locator('[data-action="prompt-permissions"]').first()
@@ -42,7 +35,7 @@ test("shell mode runs a command in the project directory", async ({ page, projec
           if (!msg) return
 
           const part = msg.parts
-            .filter(isBash)
+            .filter(isShell)
             .find((item) => item.state.input?.command === cmd && item.state.status === "completed")
 
           if (!part || part.state.status !== "completed") return

packages/app/e2e/utils.ts

@@ -1,4 +1,4 @@
-import { createOpencodeClient } from "@opencode-ai/sdk/v2/client"
+import { createOpencodeClient, type ToolPart } from "@opencode-ai/sdk/v2/client"
 import { base64Encode, checksum } from "@opencode-ai/util/encode"
 
 export const serverHost = process.env.PLAYWRIGHT_SERVER_HOST ?? "127.0.0.1"
@@ -18,6 +18,7 @@ const serverLabels = (() => {
 export const serverNames = [...new Set(serverLabels)]
 
 export const serverUrls = serverNames.map((name) => `http://${name}`)
+const shell = new Set(["bash", "pwsh", "powershell"])
 
 const escape = (value: string) => value.replace(/[.*+?^${}()|[\]\\]/g, "\\$&")
 
@@ -30,6 +31,13 @@ export function createSdk(directory?: string, baseUrl = serverUrl) {
   return createOpencodeClient({ baseUrl, directory, throwOnError: true })
 }
 
+export function isShell(part: unknown): part is ToolPart {
+  if (!part || typeof part !== "object") return false
+  if (!("type" in part) || part.type !== "tool") return false
+  if (!("tool" in part) || typeof part.tool !== "string" || !shell.has(part.tool)) return false
+  return "state" in part
+}
+
 export async function resolveDirectory(directory: string, baseUrl = serverUrl) {
   return createSdk(directory, baseUrl)
     .path.get()