feat: unified fleet CLI, Main Chat preservation policy, sidechat routing, and file transfers

- Added CHAT_POLICY.md and README.md banner enforcing sidechat-first and file-transfer-first rules.
- Added strict Main Chat block to super dm send and super dm wo with --allow-main-chat override.
- Implemented file transfer staging and metadata registry in super dm send-file and super dm files (with clean subcommand).
- Added full job lifecycle management (show, create, enable, disable, delete, run --follow) to super-cli.py and box-ctl.py.
- Audited all jobs in jobs/*.json and redirected automated dispatches away from Main Chat.
- Hardened chromebox-watchdog.sh with systemd user session environment exports and stale singleton cleanup.
- Added compose_check command choice to muse-chat-api.py.

bin/box-ctl.py

@@ -853,6 +853,7 @@ def act_loop_remediate(dry_run=False):
         from gravity import remediate_breaks
         res = remediate_breaks(dry_run=dry_run)
         audit("loop-remediate", f"dry_run={dry_run}")
+        res.pop("ok", None)
         out(True, **res)
     except Exception as e:
         fail("LOOP_ERROR", str(e))
@@ -886,18 +887,21 @@ variable actions:
   vars-get <name>
   vars-set <name> <value>
   vars-reset <name>
+  vars-history [name] [limit]
+  vars-rollback <name> [revision]
 
 strategy actions:
   strat-list
-  strat-get <type> [subtype]
+  strat-get <type> [subtype] [--agent AGENT]
   strat-set <type>          (JSON on stdin or as arg)
-  strat-reset <type> [subtype]
+  strat-reset <type> [subtype] [--agent AGENT]
 
 loop actions:
   loop-status [--agent AGENT] [--limit N] [--status STATUS]
   loop-health [--threshold T]
   loop-breaks
   loop-resolve <dm_id> [note]
+  loop-remediate [--dry-run]
 
 notify:
   notify <agent> <message>"""
@@ -962,23 +966,63 @@ def main(argv):
         if len(rest) != 1:
             fail("BAD_NAME", "usage: vars-reset <name>")
         act_vars_reset(rest[0])
+    elif action == "vars-history":
+        name = None
+        limit = 20
+        if rest:
+            name = rest[0]
+        if len(rest) > 1:
+            try:
+                limit = int(rest[1])
+            except ValueError:
+                limit = 20
+        act_vars_history(name=name, limit=limit)
+    elif action == "vars-rollback":
+        if len(rest) < 1 or len(rest) > 2:
+            fail("BAD_NAME", "usage: vars-rollback <name> [revision]")
+        rev = rest[1] if len(rest) > 1 else None
+        act_vars_rollback(rest[0], revision=rev)
     elif action == "strat-list":
         act_strat_list()
     elif action == "strat-get":
-        if len(rest) < 1 or len(rest) > 2:
-            fail("BAD_NAME", "usage: strat-get <type> [subtype]")
-        sub = rest[1] if len(rest) > 1 else None
-        act_strat_get(rest[0], sub)
+        if not rest:
+            fail("BAD_NAME", "usage: strat-get <type> [subtype] [--agent AGENT]")
+        itype = rest[0]
+        subtype = None
+        agent = None
+        idx = 1
+        while idx < len(rest):
+            if rest[idx] == "--agent" and idx + 1 < len(rest):
+                agent = rest[idx + 1]
+                idx += 2
+            elif subtype is None and not rest[idx].startswith("--"):
+                subtype = rest[idx]
+                idx += 1
+            else:
+                idx += 1
+        act_strat_get(itype, subtype=subtype, agent=agent)
     elif action == "strat-set":
         if len(rest) < 1:
             fail("BAD_NAME", "usage: strat-set <type> [JSON]")
         payload = rest[1] if len(rest) > 1 else None
         act_strat_set(rest[0], payload)
     elif action == "strat-reset":
-        if len(rest) < 1 or len(rest) > 2:
-            fail("BAD_NAME", "usage: strat-reset <type> [subtype]")
-        sub = rest[1] if len(rest) > 1 else None
-        act_strat_reset(rest[0], sub)
+        if not rest:
+            fail("BAD_NAME", "usage: strat-reset <type> [subtype] [--agent AGENT]")
+        itype = rest[0]
+        subtype = None
+        agent = None
+        idx = 1
+        while idx < len(rest):
+            if rest[idx] == "--agent" and idx + 1 < len(rest):
+                agent = rest[idx + 1]
+                idx += 2
+            elif subtype is None and not rest[idx].startswith("--"):
+                subtype = rest[idx]
+                idx += 1
+            else:
+                idx += 1
+        act_strat_reset(itype, subtype=subtype, agent=agent)
     elif action == "loop-status":
         agent = None
         limit = 20
@@ -1007,6 +1051,9 @@ def main(argv):
             fail("BAD_NAME", "usage: loop-resolve <dm_id> [note]")
         note = rest[1] if len(rest) > 1 else None
         act_loop_resolve(rest[0], note=note)
+    elif action == "loop-remediate":
+        dry = "--dry-run" in rest
+        act_loop_remediate(dry_run=dry)
     elif action == "notify":
         if len(rest) != 2:
             fail("BAD_NAME", "usage: notify <agent> <message>")