fix(non-interactive-env): respect Windows command shell

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/hooks/non-interactive-env/non-interactive-env-hook.ts

@@ -1,7 +1,7 @@
 import type { PluginInput } from "@opencode-ai/plugin"
 import { HOOK_NAME, NON_INTERACTIVE_ENV, SHELL_COMMAND_PATTERNS } from "./constants"
 import { log, buildEnvPrefix } from "../../shared"
-import { detectShellType } from "../../shared/shell-env"
+import { detectShellType, type ShellType } from "../../shared/shell-env"
 
 export * from "./constants"
 export * from "./detector"
@@ -20,6 +20,29 @@ function detectBannedCommand(command: string): string | undefined {
   return undefined
 }
 
+function detectCommandShellType(): ShellType {
+  if (process.platform === "win32" && process.env.SHELL) {
+    const shellName = process.env.SHELL.replace(/\\/g, "/").split("/").pop()?.toLowerCase()
+    if (shellName === "cmd" || shellName === "cmd.exe") {
+      return "cmd"
+    }
+    if (
+      shellName === "powershell" ||
+      shellName === "powershell.exe" ||
+      shellName === "pwsh" ||
+      shellName === "pwsh.exe"
+    ) {
+      return "powershell"
+    }
+  }
+
+  if (process.platform === "win32" && !process.env.SHELL && !process.env.MSYSTEM) {
+    return "cmd"
+  }
+
+  return detectShellType()
+}
+
 export function createNonInteractiveEnvHook(_ctx: PluginInput) {
   return {
     "tool.execute.before": async (
@@ -53,7 +76,7 @@ export function createNonInteractiveEnvHook(_ctx: PluginInput) {
       // The env vars (GIT_EDITOR=:, EDITOR=:, etc.) must ALWAYS be injected
       // for git commands to prevent interactive prompts.
 
-      const shellType = detectShellType()
+      const shellType = detectCommandShellType()
       const envPrefix = buildEnvPrefix(NON_INTERACTIVE_ENV, shellType)
       
       // Check if the command already starts with the prefix to avoid stacking.