fix(non-interactive-env): prepend env vars directly to git command string

OpenCode's bash tool ignores args.env and uses hardcoded process.env in spawn().
Work around this by prepending GIT_EDITOR, EDITOR, VISUAL, and PAGER env vars
directly to the command string. Only applies to git commands to avoid bloating
non-git commands.

Added shellEscape() and buildEnvPrefix() helper functions to properly escape
env var values and construct the prefix string.

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

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

@@ -19,6 +19,30 @@ function detectBannedCommand(command: string): string | undefined {
   return undefined
 }
 
+/**
+ * Shell-escape a value for use in VAR=value prefix.
+ * Wraps in single quotes if contains special chars.
+ */
+function shellEscape(value: string): string {
+  // Empty string needs quotes
+  if (value === "") return "''"
+  // If contains special chars, wrap in single quotes (escape existing single quotes)
+  if (/[^a-zA-Z0-9_\-.:\/]/.test(value)) {
+    return `'${value.replace(/'/g, "'\\''")}'`
+  }
+  return value
+}
+
+/**
+ * Build env prefix string: VAR1=val1 VAR2=val2 ...
+ * OpenCode's bash tool ignores args.env, so we must prepend to command.
+ */
+function buildEnvPrefix(env: Record<string, string>): string {
+  return Object.entries(env)
+    .map(([key, value]) => `${key}=${shellEscape(value)}`)
+    .join(" ")
+}
+
 export function createNonInteractiveEnvHook(_ctx: PluginInput) {
   return {
     "tool.execute.before": async (
@@ -34,20 +58,25 @@ export function createNonInteractiveEnvHook(_ctx: PluginInput) {
         return
       }
 
-      output.args.env = {
-        ...process.env,
-        ...(output.args.env as Record<string, string> | undefined),
-        ...NON_INTERACTIVE_ENV,
-      }
-
       const bannedCmd = detectBannedCommand(command)
       if (bannedCmd) {
         output.message = `⚠️ Warning: '${bannedCmd}' is an interactive command that may hang in non-interactive environments.`
       }
 
-      log(`[${HOOK_NAME}] Set non-interactive environment variables`, {
+      // Only prepend env vars for git commands (editor blocking, pager, etc.)
+      const isGitCommand = /\bgit\b/.test(command)
+      if (!isGitCommand) {
+        return
+      }
+
+      // OpenCode's bash tool uses hardcoded `...process.env` in spawn(),
+      // ignoring any args.env we might set. Prepend to command instead.
+      const envPrefix = buildEnvPrefix(NON_INTERACTIVE_ENV)
+      output.args.command = `${envPrefix} ${command}`
+
+      log(`[${HOOK_NAME}] Prepended non-interactive env vars to git command`, {
         sessionID: input.sessionID,
-        env: NON_INTERACTIVE_ENV,
+        envPrefix,
       })
     },
   }