Initial commit: extracted from impostor-bbs gems/bbs

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/bbs/session.rb

@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+require 'securerandom'
+
+module BBS
+  class Session
+    include Telnet
+
+    def initialize(client)
+      @client     = client
+      @session_id = SecureRandom.hex(8)
+    end
+
+    def run
+      negotiate
+      flow = BBS.config.flow or raise "BBS.config.flow is not set"
+      FlowRunner.new(self, @session_id, flow).run
+    ensure
+      @client.close rescue nil
+    end
+  end
+end