feat(kvb-org): add the night cycle to run one agent under token limits

kvb-org-evening and kvb-org-sunset narrow the organisation to the session the operator types them in; kvb-org-sunrise undoes it. night.py keeps the state in <council root>/night.json: set makes the caller active and lists the other live sessions, status tells each session its part (active, awake, relax, sleep), wake lifts one session alone, clear ends the night; a missing or invalid state means day. Evening messages every other session to run kvb-agent-relax (finish the task, end its loops, start nothing); sunset messages them in waves of three to run kvb-agent-sleep (park at the next safe point, never cut a running job short, end loops, write a ten-line handover into the project's memory directory, reply asleep), and the operator then sets inbound messages to hold. At night the active session admits its own runs through watch.py and leaves the sleepers' offices alone. Sunrise switches messages back to accept, clears the state and sends kvb-agent-wakeup, which restores loops, jobs and roles from the handover; the operator can also wake one session alone by typing it there.

A peer's request to do less now needs no operator approval in the kvb-org-organize Peer protocol, and kvb-org-robot stops a run at its next safe point when the night reaches it. The README gains the agent category's state meaning and the new nodes; test_night covers set, status, wake, clear and a bad state.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -9,7 +9,7 @@ Compatible with Claude Code, Codex, Gemini CLI, Cursor, Copilot, Windsurf, Cline
 
 ## Naming 🏷️
 
-Every first-party skill is named `kvb-<category>-<name>` with one of these categories: `think`, `create`, `code`, `ci`, `git`, `check`, `org`, `agent`, `skill`, `coach`: `think` thinks without producing a file, `create` produces an artifact, `code` works on code, `ci` on pipelines, `git` on history and forges, `check` analyses and reports findings, `org` coordinates agents, `agent` makes a repository easy for agents (code index, agent instructions), `skill` works on skills themselves, `coach` serves the operator's wellbeing. Only `kvb-cleanup`, `kvb-coach`, `kvb-help` and the collectors `kvb-dream`, `kvb-optimize` and `kvb-transcend` stand without a category. Names use `a-z`, `0-9` and single hyphens, at most 64 characters, and equal their directory name. `tests/test_naming.py` enforces all of it, including that the organigram below lists every skill under its category.
+Every first-party skill is named `kvb-<category>-<name>` with one of these categories: `think`, `create`, `code`, `ci`, `git`, `check`, `org`, `agent`, `skill`, `coach`: `think` thinks without producing a file, `create` produces an artifact, `code` works on code, `ci` on pipelines, `git` on history and forges, `check` analyses and reports findings, `org` coordinates agents, `agent` acts on one agent itself: its repository setup (code index, agent instructions) and its state (relax, sleep, wake up), `skill` works on skills themselves, `coach` serves the operator's wellbeing. Only `kvb-cleanup`, `kvb-coach`, `kvb-help` and the collectors `kvb-dream`, `kvb-optimize` and `kvb-transcend` stand without a category. Names use `a-z`, `0-9` and single hyphens, at most 64 characters, and equal their directory name. `tests/test_naming.py` enforces all of it, including that the organigram below lists every skill under its category.
 
 ## Organigram 🏛️
 
@@ -73,7 +73,13 @@ flowchart LR
   org --> org_robot[kvb-org-robot]
   org --> org_operator[kvb-org-operator]
   org --> org_priority[kvb-org-priority]
+  org --> org_evening[kvb-org-evening]
+  org --> org_sunset[kvb-org-sunset]
+  org --> org_sunrise[kvb-org-sunrise]
   agent --> agent_optimize[kvb-agent-optimize]
+  agent --> agent_relax[kvb-agent-relax]
+  agent --> agent_sleep[kvb-agent-sleep]
+  agent --> agent_wakeup[kvb-agent-wakeup]
   skill --> skill_tune[kvb-skill-tune]
   skill --> skill_auto[kvb-skill-auto]
   skill --> skill_essence[kvb-skill-essence]
@@ -161,9 +167,15 @@ flowchart LR
     robot[kvb-org-robot]
     operator[kvb-org-operator]
     priority[kvb-org-priority]
+    evening[kvb-org-evening]
+    sunset[kvb-org-sunset]
+    sunrise[kvb-org-sunrise]
   end
   subgraph cat_agent [agent]
     agent_optimize[kvb-agent-optimize]
+    relax[kvb-agent-relax]
+    sleep[kvb-agent-sleep]
+    wakeup[kvb-agent-wakeup]
   end
   subgraph cat_skill [skill]
     autotune[kvb-skill-tune]
@@ -281,6 +293,13 @@ flowchart LR
   optimize --> gaps
   agent_optimize -. install .-> operator
   agent_optimize -. domain graphs .-> rasci
+  evening -. message .-> relax
+  sunset -. message .-> sleep
+  sunrise -. message .-> wakeup
+  relax --> sleep
+  sunset -. hold and accept .-> operator
+  sunrise -. hold and accept .-> operator
+  sleep -. stops .-> robot
   coach --> active_listening
   coach --> operator
   coach --> rasci