fix(non-interactive-env): detect shell type for csh/tcsh env var syntax (fixes #2089)

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

@@ -1,6 +1,6 @@
 import type { PluginInput } from "@opencode-ai/plugin"
 import { HOOK_NAME, NON_INTERACTIVE_ENV, SHELL_COMMAND_PATTERNS } from "./constants"
-import { log, buildEnvPrefix } from "../../shared"
+import { log, buildEnvPrefix, detectShellType } from "../../shared"
 
 export * from "./constants"
 export * from "./detector"
@@ -52,9 +52,9 @@ export function createNonInteractiveEnvHook(_ctx: PluginInput) {
       // The env vars (GIT_EDITOR=:, EDITOR=:, etc.) must ALWAYS be injected
       // for git commands to prevent interactive prompts.
 
-      // The bash tool always runs in a Unix-like shell (bash/sh), even on Windows
-      // (via Git Bash, WSL, etc.), so always use unix export syntax.
-      const envPrefix = buildEnvPrefix(NON_INTERACTIVE_ENV, "unix")
+      // Detect the current shell type for proper env var syntax (export for bash/zsh, setenv for csh/tcsh, etc.)
+      const shellType = detectShellType()
+      const envPrefix = buildEnvPrefix(NON_INTERACTIVE_ENV, shellType)
       
       // Check if the command already starts with the prefix to avoid stacking.
       // This maintains the non-interactive behavior and makes the operation idempotent.

src/shared/shell-env.ts

@@ -1,4 +1,4 @@
-export type ShellType = "unix" | "powershell" | "cmd"
+export type ShellType = "unix" | "powershell" | "cmd" | "csh"
 
 /**
  * Detect the current shell type based on environment variables.
@@ -14,6 +14,10 @@ export function detectShellType(): ShellType {
   }
 
   if (process.env.SHELL) {
+    const shell = process.env.SHELL
+    if (shell.includes("csh") || shell.includes("tcsh")) {
+      return "csh"
+    }
     return "unix"
   }
 
@@ -34,6 +38,7 @@ export function shellEscape(value: string, shellType: ShellType): string {
 
   switch (shellType) {
     case "unix":
+    case "csh":
       if (/[^a-zA-Z0-9_\-.:\/]/.test(value)) {
         return `'${value.replace(/'/g, "'\\''")}'`
       }
@@ -91,6 +96,13 @@ export function buildEnvPrefix(
       return `export ${assignments};`
     }
 
+    case "csh": {
+      const assignments = entries
+        .map(([key, value]) => `setenv ${key} ${shellEscape(value, shellType)}`)
+        .join("; ")
+      return `${assignments};`
+    }
+
     case "powershell": {
       const assignments = entries
         .map(([key, value]) => `$env:${key}=${shellEscape(value, shellType)}`)