the model is the agent, the code is the harness

Comprehensive rewrite establishing the harness engineering narrative
across the entire repository.

README (EN/ZH/JA): added "The Model IS the Agent" manifesto with
historical proof (DQN, OpenAI Five, AlphaStar, Tencent Jueyu),
"What an Agent Is NOT" critique, harness engineer role definition,
"Why Claude Code" as masterclass in harness design, and universe
vision. Consistent framing: model = driver, harness = vehicle.

docs (36 files, 3 languages): injected one-line "Harness layer"
callout after the motto in every session document (s01-s12).

agents (13 Python files): added harness framing comment before
each module docstring.

skills/agent-philosophy.md: full rewrite aligned with harness
narrative.

agents/__init__.py

@@ -1,2 +1,3 @@
-# agents/ - Python teaching agents (s01-s12) + reference agent (s_full)
+# agents/ - Harness implementations (s01-s12) + full reference (s_full)
 # Each file is self-contained and runnable: python agents/s01_agent_loop.py
+# The model is the agent. These files are the harness.

agents/s01_agent_loop.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+# Harness: the loop -- the model's first connection to the real world.
 """
 s01_agent_loop.py - The Agent Loop
 

agents/s02_tool_use.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+# Harness: tool dispatch -- expanding what the model can reach.
 """
 s02_tool_use.py - Tools
 

agents/s03_todo_write.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+# Harness: planning -- keeping the model on course without scripting the route.
 """
 s03_todo_write.py - TodoWrite
 

agents/s04_subagent.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+# Harness: context isolation -- protecting the model's clarity of thought.
 """
 s04_subagent.py - Subagents
 

agents/s05_skill_loading.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+# Harness: on-demand knowledge -- domain expertise, loaded when the model asks.
 """
 s05_skill_loading.py - Skills
 

agents/s06_context_compact.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+# Harness: compression -- clean memory for infinite sessions.
 """
 s06_context_compact.py - Compact
 

agents/s07_task_system.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+# Harness: persistent tasks -- goals that outlive any single conversation.
 """
 s07_task_system.py - Tasks
 

agents/s08_background_tasks.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+# Harness: background execution -- the model thinks while the harness waits.
 """
 s08_background_tasks.py - Background Tasks
 

agents/s09_agent_teams.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+# Harness: team mailboxes -- multiple models, coordinated through files.
 """
 s09_agent_teams.py - Agent Teams
 

agents/s10_team_protocols.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+# Harness: protocols -- structured handshakes between models.
 """
 s10_team_protocols.py - Team Protocols
 

agents/s11_autonomous_agents.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+# Harness: autonomy -- models that find work without being told.
 """
 s11_autonomous_agents.py - Autonomous Agents
 

agents/s12_worktree_task_isolation.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+# Harness: directory isolation -- parallel execution lanes that never collide.
 """
 s12_worktree_task_isolation.py - Worktree + Task Isolation
 

agents/s_full.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+# Harness: all mechanisms combined -- the complete cockpit for the model.
 """
 s_full.py - Full Reference Agent