feat: auto-create default config on register + resume via session_id

__init__.py

@@ -144,6 +144,49 @@ def _build_row(columns: list, session: dict, index: int = 0) -> str:
     return "  ".join(parts)
 
 
+# ── Default config bootstrapping ─────────────────────────────────────
+
+def _ensure_default_config() -> None:
+    """Create session_list_config.yaml with sensible defaults if missing."""
+    config_path = _hermes_home() / "session_list_config.yaml"
+    if config_path.exists():
+        return
+
+    default_config = """\
+# Hermes Session List — Column Configuration
+#
+# columns: ordered list of columns to display.
+#   field:  session row key — available fields:
+#           # (row index), id, source, model, title, started_at,
+#           ended_at, message_count, preview, last_active,
+#           input_tokens, output_tokens, total_tokens, net_input, net_total,
+#           cache_read_tokens, cache_write_tokens, reasoning_tokens
+#   width:  column width in characters
+#           (0 = free-form for the LAST column — can overflow)
+#   label:  header text
+#
+# NOTE: input_tokens = cache miss (Hermes already deducts cache hits).
+#       net_input = max(0, input - cache) — would double-deduct.
+# 
+# Used by /sl slash command. Survives `hermes update`.
+
+columns:
+  - {field: last_active, width: 10, label: Active}
+  - {field: title, width: 42, label: Title}
+  - {field: message_count, width: 4, label: Msgs}
+  - {field: cache_read_tokens, width: 6, label: Hit}
+  - {field: input_tokens, width: 6, label: Miss}
+  - {field: output_tokens, width: 6, label: Out}
+  - {field: id, width: 34, label: Session ID}
+"""
+
+    try:
+        config_path.parent.mkdir(parents=True, exist_ok=True)
+        config_path.write_text(default_config, encoding="utf-8")
+    except Exception:
+        pass  # Silent fail — handler falls back to hardcoded defaults
+
+
 # ── Slash command handler ────────────────────────────────────────────
 
 def _handle_sl(raw_args: str) -> Optional[str]:
@@ -164,11 +207,13 @@ def _handle_sl(raw_args: str) -> Optional[str]:
 
     if not columns:
         columns = [
-            {"field": "#", "width": 3, "label": "#"},
-            {"field": "title", "width": 32, "label": "Title"},
-            {"field": "preview", "width": 40, "label": "Preview"},
-            {"field": "last_active", "width": 13, "label": "Last Active"},
-            {"field": "id", "width": 0, "label": "ID"},
+            {"field": "last_active", "width": 10, "label": "Active"},
+            {"field": "title", "width": 42, "label": "Title"},
+            {"field": "message_count", "width": 4, "label": "Msgs"},
+            {"field": "cache_read_tokens", "width": 6, "label": "Hit"},
+            {"field": "input_tokens", "width": 6, "label": "Miss"},
+            {"field": "output_tokens", "width": 6, "label": "Out"},
+            {"field": "id", "width": 34, "label": "Session ID"},
         ]
 
     # Parse limit from args
@@ -197,7 +242,7 @@ def _handle_sl(raw_args: str) -> Optional[str]:
 
     # Add hint for /resume
     lines.append("")
-    lines.append("Use /resume <#> to continue a session. Example: /resume 2")
+    lines.append("Use /resume <session_id> to continue. Example: /resume 20260612_222504_8a868b")
 
     return "\n".join(lines)
 
@@ -205,6 +250,9 @@ def _handle_sl(raw_args: str) -> Optional[str]:
 # ── Plugin registration ──────────────────────────────────────────────
 
 def register(ctx) -> None:
+    # Ensure default config file exists on first load
+    _ensure_default_config()
+
     ctx.register_command(
         "sl",
         handler=_handle_sl,