Update "LLM-Agent-Testbed-Architecture.-"

LLM-Agent-Testbed-Architecture.-.md

@@ -1,8 +1,8 @@
 # LLM Agent Testbed Architecture
 
-**Status**: Planning  
+**Status**: Design Complete, Implementation Pending  
 **Parent Issue**: #154 - Grounded Multi-Agent Testbed  
-**Last Updated**: 2025-12-14
+**Last Updated**: 2026-02-07
 
 ## Overview
 
@@ -13,6 +13,8 @@ This document describes the architecture for running LLM agents in McRogueFace e
 
 The key insight is that both modes share the same physics layer, but differ in their perception layer. An **ActionLog** bridges this gap, providing structured event data that humans can view as a combat log and agents receive as text context.
 
+> **Headless Mode Available**: McRogueFace now supports true headless execution (`--headless --exec`) with deterministic frame stepping via `mcrfpy.step()` (#157 completed). This enables agent testing without an X11 display server or GPU, making it suitable for CI pipelines, remote servers, and automated evaluation harnesses.
+
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 ## Architecture Layers
@@ -644,10 +646,11 @@ src/scripts/
 
 ## Related Issues
 
-- #154 - Grounded Multi-Agent Testbed (parent)
-- #155 - Deterministic Text Descriptions (closed)
-- #156 - Turn-based LLM Agent Orchestration (in progress)
-- #153 - Separate render loop from game state loop (complete)
+- #153 - Separate render loop from game state loop (**complete**)
+- #154 - Grounded Multi-Agent Testbed (parent, **open**, 2 comments)
+- #155 - Deterministic Text Descriptions (**closed**)
+- #156 - Turn-based LLM Agent Orchestration (**open**, 4 comments, in progress)
+- #157 - Headless mode (**complete** - enables display-free agent testing)
 
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