feat(skills)!: S4 night commands become drain, suspend and resume

Requirement 001 phase 6, S4 (decision 29):

- Skills renamed: kvb-org-evening -> kvb-org-drain, kvb-org-sunset ->
  kvb-org-suspend, kvb-org-sunrise -> kvb-org-resume, kvb-agent-relax
  -> kvb-agent-drain, kvb-agent-sleep -> kvb-agent-suspend,
  kvb-agent-wakeup -> kvb-agent-resume; their text uses the new verbs and
  every reference in skills, README, orchestrator and tests follows.
- night.py takes drain, suspend, resume, resume --alone and status. A
  state file written before the rename keeps working: mode evening reads
  as drain, sunset as suspend, the awake list as resumed and is rewritten
  on the next save; the hub's council.night_mode maps the same values.
  mode: day and handover_night_<session>.md keep their names.
- Orchestrator: the Day/Night menu shows Drain, Suspend and Resume, each
  confirmed, signed through /api/board/sign with the passkey and run as
  the existing argv job; the old action names are refused.
- kvb-skill-cleanup: git rates two renames at 44 and 50 % similarity,
  under its default threshold, so legacy.py detects renames from 40 %.
- tests/test_night_names.py fails on any old name in the tree outside a
  rename record "old ->".

BREAKING CHANGE: the six old skill names and night.py's clear and wake
are gone. Run make install (it reinstalls the orchestrator too), then
kvb-skill-cleanup to remove the old installed copies; until the install,
the running hub calls the old night.py path.

Evidence: make test 679 OK, ruff and markdownlint clean
(/tmp/s4-make-test-1.log); e2e 22 OK in Chromium and Firefox
(/tmp/s4-e2e-3.log); MEDUSA 23 files, the 2 findings are the
byte-identical atomic state write that moved with night.py, already
accepted after a skeptic at its old path, rescan 0 open.

🎯 Fix: 93 %
💥 Break: 4 %
💸 Cost: 100 %
⏱️ Time: –
🛡️ Security: 100 %
🏆 Score: 89
🚦 Gate: ✅ 90/5, cost and time <= 100, security 100 %

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

tests/test_night_names.py

@@ -0,0 +1,65 @@
+"""Pin decision 29: the six night skills renamed to drain, suspend and resume leave their old names nowhere but in a rename record."""
+
+from __future__ import annotations
+
+import re
+import subprocess
+import unittest
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parents[1]
+RENAMED = {
+    "kvb-org-evening": "kvb-org-drain",
+    "kvb-org-sunset": "kvb-org-suspend",
+    "kvb-org-sunrise": "kvb-org-resume",
+    "kvb-agent-relax": "kvb-agent-drain",
+    "kvb-agent-sleep": "kvb-agent-suspend",
+    "kvb-agent-wakeup": "kvb-agent-resume",
+}
+OLD = re.compile(r"(?<![\w-])(?:" + "|".join(map(re.escape, RENAMED)) + r")(?![\w-])")
+RECORD = re.compile(r"`(?:" + "|".join(map(re.escape, RENAMED)) + r")` →")
+SELF = Path(__file__).resolve().relative_to(REPO_ROOT).as_posix()
+
+
+def old_name_lines() -> list[str]:
+    """Returns:
+        Every `path:line` of a tracked or new, not ignored text file that names
+        an old night skill outside a rename record (`old` → `new`, as decision
+        29 of docs/requirements/001-agent-orchestrator.md writes it).
+    """
+    listed = subprocess.run(
+        ["git", "ls-files", "-z", "--cached", "--others", "--exclude-standard"],
+        cwd=REPO_ROOT, capture_output=True, text=True, check=True,
+    ).stdout
+    hits = []
+    for name in sorted(set(listed.split("\0")) - {"", SELF}):
+        try:
+            text = (REPO_ROOT / name).read_text(encoding="utf-8")
+        except (UnicodeDecodeError, IsADirectoryError, FileNotFoundError):
+            continue
+        for number, line in enumerate(text.splitlines(), 1):
+            if OLD.search(RECORD.sub("", line)):
+                hits.append(f"{name}:{number}")
+    return hits
+
+
+class TestNightNames(unittest.TestCase):
+    def test_the_six_new_skills_exist_and_the_old_ones_do_not(self):
+        for old, new in RENAMED.items():
+            with self.subTest(skill=new):
+                self.assertTrue((REPO_ROOT / "skills" / new / "SKILL.md").is_file())
+                self.assertFalse((REPO_ROOT / "skills" / old).exists())
+
+    def test_old_names_live_only_in_rename_records(self):
+        self.assertEqual(old_name_lines(), [], "write a rename as `old` → `new`; any other mention goes")
+
+    def test_a_rename_record_is_the_only_exemption(self):
+        self.assertIsNone(OLD.search(RECORD.sub("", "`kvb-org-sunset` → `kvb-org-suspend`")))
+        for line in ("run kvb-agent-sleep now", "`kvb-org-sunset`", "kvb-org-sunset → kvb-org-suspend", "skills/kvb-org-sunrise/SKILL.md"):
+            with self.subTest(line=line):
+                self.assertIsNotNone(OLD.search(RECORD.sub("", line)))
+        self.assertIsNone(OLD.search("kvb-org-sunsets kvb-agent-sleeper my-kvb-org-evening"))
+
+
+if __name__ == "__main__":
+    print("\n".join(old_name_lines()))