feat: reminders_add and reminders_list tools

- New cortex/tools/reminders.py with reminders_add, reminders_list, reminders_clear
- reminders_clear moved here from cron.py (cron still imports from same file)
- __init__.py: wired up new callables and Gemini declarations
- Inara can now add/read reminders in Agent mode via the orchestrator

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

cortex/tools/__init__.py

@@ -28,6 +28,10 @@ from tools.cron import (
     cron_add as _cron_add,
     cron_remove as _cron_remove,
     cron_toggle as _cron_toggle,
+)
+from tools.reminders import (
+    reminders_add as _reminders_add,
+    reminders_list as _reminders_list,
     reminders_clear as _reminders_clear,
 )
 from tools.scratch import (
@@ -196,6 +200,8 @@ _CALLABLES: dict[str, callable] = {
     "cron_add": _cron_add,
     "cron_remove": _cron_remove,
     "cron_toggle": _cron_toggle,
+    "reminders_add": _reminders_add,
+    "reminders_list": _reminders_list,
     "reminders_clear": _reminders_clear,
     "scratch_read": _scratch_read,
     "scratch_write": _scratch_write,
@@ -409,6 +415,40 @@ _cron_toggle_declaration = types.FunctionDeclaration(
     ),
 )
 
+_reminders_add_declaration = types.FunctionDeclaration(
+    name="reminders_add",
+    description=(
+        "Add a new reminder to REMINDERS.md. Reminders are automatically surfaced "
+        "in your context at the start of each session (Tier 2+). "
+        "Use this when the user asks you to remember something, follow up on something, "
+        "or surface a note at the next session."
+    ),
+    parameters=types.Schema(
+        type=types.Type.OBJECT,
+        properties={
+            "text": types.Schema(
+                type=types.Type.STRING,
+                description="The reminder text to add",
+            ),
+            "label": types.Schema(
+                type=types.Type.STRING,
+                description="Optional heading for this reminder (e.g. 'Follow up on NC Talk'). Defaults to current timestamp.",
+            ),
+        },
+        required=["text"],
+    ),
+)
+
+_reminders_list_declaration = types.FunctionDeclaration(
+    name="reminders_list",
+    description=(
+        "Read all current pending reminders from REMINDERS.md. "
+        "Use this to check what reminders are queued before adding duplicates, "
+        "or to show the user what's pending."
+    ),
+    parameters=types.Schema(type=types.Type.OBJECT, properties={}),
+)
+
 _reminders_clear_declaration = types.FunctionDeclaration(
     name="reminders_clear",
     description=(
@@ -494,6 +534,8 @@ TOOL_DECLARATIONS = [
         _cron_add_declaration,
         _cron_remove_declaration,
         _cron_toggle_declaration,
+        _reminders_add_declaration,
+        _reminders_list_declaration,
         _reminders_clear_declaration,
         _scratch_read_declaration,
         _scratch_write_declaration,