fix(curator): seed defaults on update, create logs/curator dir, defer fire import (#17927)

Three fixes bundled for curator reliability on existing installs and
broken/partial installs:

1. run_agent.py: defer `import fire` into the __main__ block. `fire` is
   only used by `fire.Fire(main)` when running run_agent.py directly as
   a CLI — it is NOT needed for library usage. Importing it at module
   top made `from run_agent import AIAgent` from a daemon thread (e.g.
   the curator's forked review agent) crash with ModuleNotFoundError
   on broken/partial installs where `fire` isn't present.

2. hermes_cli/config.py: add version 22 → 23 migration that writes the
   `curator` + `auxiliary.curator` sections to config.yaml with their
   defaults, only filling keys the user hasn't overridden. Existing
   configs from before PR #16049 / the April 2026 `auxiliary.curator`
   unification had neither section on disk, so users couldn't see or
   edit the settings in their config.yaml (runtime deep-merge papered
   over it at read time, but the file never reflected reality).

3. hermes_cli/config.py: `ensure_hermes_home()` now pre-creates
   `~/.hermes/logs/curator/` alongside cron/sessions/logs/memories on
   every CLI launch. Managed-mode (NixOS) variant mkdir's it
   defensively after the activation-script existence checks, since the
   activation script may not know about this subpath.

4. agent/curator.py: `_reports_root()` mkdir's the dir at call time as
   belt-and-suspenders for entry paths that bypass both
   ensure_hermes_home() and the v23 migration (gateway-only installs,
   bare library use).

E2E validated in isolated HERMES_HOME: fresh install gets full defaults
seeded; partial-override config keeps user's `enabled: false` and
custom `interval_hours` while filling the missing keys; re-running the
migration is a no-op.

hermes_cli/config.py

@@ -350,7 +350,7 @@ def ensure_hermes_home():
     else:
         home.mkdir(parents=True, exist_ok=True)
         _secure_dir(home)
-        for subdir in ("cron", "sessions", "logs", "memories"):
+        for subdir in ("cron", "sessions", "logs", "logs/curator", "memories"):
             d = home / subdir
             d.mkdir(parents=True, exist_ok=True)
             _secure_dir(d)
@@ -371,6 +371,10 @@ def _ensure_hermes_home_managed(home: Path):
                 f"{d} does not exist. "
                 "Run 'sudo nixos-rebuild switch' first."
             )
+    # Curator reports dir is a sub-path of logs/; create it if missing.
+    # In managed mode the activation script may not know about this subdir,
+    # so we mkdir it ourselves (it's inside an already-secured logs/ dir).
+    (home / "logs" / "curator").mkdir(parents=True, exist_ok=True)
     # Inside umask(0o007) scope — SOUL.md will be created as 0660
     _ensure_default_soul_md(home)
 
@@ -1201,7 +1205,7 @@ DEFAULT_CONFIG = {
     },
 
     # Config schema version - bump this when adding new required fields
-    "_config_version": 22,
+    "_config_version": 23,
 }
 
 # =============================================================================
@@ -3274,6 +3278,90 @@ def migrate_config(interactive: bool = True, quiet: bool = False) -> Dict[str, A
                         "Use `hermes plugins enable <name>` to activate."
                     )
 
+    # ── Version 22 → 23: seed curator defaults + create logs/curator/ ──
+    # The curator (background skill maintenance) was added in PR #16049, but
+    # existing configs from before that PR (or before the April 2026
+    # unification under `auxiliary.curator`) never wrote the curator section
+    # to disk. The runtime deep-merge in `load_config()` fills defaults at
+    # read time, so the curator *functions*; but users can't see/edit the
+    # settings in their `config.yaml`, and `hermes curator status` has no
+    # stable logs dir to point at until the first run mkdir's it.
+    #
+    # This migration:
+    #   1. Writes the `curator` top-level section to config.yaml (enabled,
+    #      interval_hours, min_idle_hours, stale_after_days, archive_after_days)
+    #      — only keys the user hasn't already overridden.
+    #   2. Writes the `auxiliary.curator` aux-task slot (provider, model,
+    #      base_url, api_key, timeout, extra_body) — canonical slot for
+    #      routing the curator fork to a cheaper aux model.
+    #   3. Creates `~/.hermes/logs/curator/` if missing (belt-and-suspenders
+    #      on top of ensure_hermes_home() — old profiles that predate this
+    #      migration still benefit).
+    if current_ver < 23:
+        try:
+            curator_dir = get_hermes_home() / "logs" / "curator"
+            curator_dir.mkdir(parents=True, exist_ok=True)
+        except Exception as e:
+            results["warnings"].append(f"Could not create {curator_dir}: {e}")
+
+        config = read_raw_config()
+        touched = False
+
+        # (1) Top-level curator section — only add missing keys
+        _curator_defaults = DEFAULT_CONFIG.get("curator", {})
+        raw_curator = config.get("curator")
+        if not isinstance(raw_curator, dict):
+            raw_curator = {}
+        added_curator: List[str] = []
+        for k, v in _curator_defaults.items():
+            if k not in raw_curator:
+                raw_curator[k] = copy.deepcopy(v)
+                added_curator.append(k)
+        if added_curator:
+            config["curator"] = raw_curator
+            touched = True
+
+        # (2) auxiliary.curator task slot
+        _aux_curator_defaults = (
+            DEFAULT_CONFIG.get("auxiliary", {}).get("curator", {})
+        )
+        raw_aux = config.get("auxiliary")
+        if not isinstance(raw_aux, dict):
+            raw_aux = {}
+        raw_aux_curator = raw_aux.get("curator")
+        if not isinstance(raw_aux_curator, dict):
+            raw_aux_curator = {}
+        added_aux: List[str] = []
+        for k, v in _aux_curator_defaults.items():
+            if k not in raw_aux_curator:
+                raw_aux_curator[k] = copy.deepcopy(v)
+                added_aux.append(k)
+        if added_aux:
+            raw_aux["curator"] = raw_aux_curator
+            config["auxiliary"] = raw_aux
+            touched = True
+
+        if touched:
+            save_config(config)
+            if added_curator:
+                results["config_added"].append(
+                    f"curator ({len(added_curator)} default key(s))"
+                )
+                if not quiet:
+                    print(
+                        "  ✓ Seeded curator defaults in config.yaml: "
+                        f"{', '.join(added_curator)}"
+                    )
+            if added_aux:
+                results["config_added"].append(
+                    f"auxiliary.curator ({len(added_aux)} default key(s))"
+                )
+                if not quiet:
+                    print(
+                        "  ✓ Seeded auxiliary.curator defaults in config.yaml: "
+                        f"{', '.join(added_aux)}"
+                    )
+
     if current_ver < latest_ver and not quiet:
         print(f"Config version: {current_ver} → {latest_ver}")