fix: disable corepack strict mode

runner/build_cmd.go

@@ -48,6 +48,11 @@ func buildCmd(t tasks.Task, cwd string, env []string) (*exec.Cmd, func(), error)
 	case "npm":
 		npmExe := tasks.ResolvePackageManagerExecutable(cwd, "npm")
 
+		// Disable corepack strict version enforcement so that a
+		// packageManager version mismatch doesn't block execution.
+		// VS Code doesn't go through corepack, so this keeps parity.
+		env = appendEnvIfMissing(env, "COREPACK_ENABLE_STRICT", "0")
+
 		// Support either:
 		// - Command/Script = npm subcommand or script name
 		// - Command empty with first arg being subcommand/script

runner/runner_helpers.go

@@ -370,6 +370,17 @@ func mergeEnv(base []string, extra map[string]string) []string {
 	return out
 }
 
+// appendEnvIfMissing adds key=value to env only if key is not already set.
+func appendEnvIfMissing(env []string, key, value string) []string {
+	prefix := key + "="
+	for _, kv := range env {
+		if strings.HasPrefix(kv, prefix) {
+			return env
+		}
+	}
+	return append(env, prefix+value)
+}
+
 func defaultShell() (exe string, args []string) {
 	if runtime.GOOS == "windows" {
 		return "cmd.exe", []string{"/C"}