fix(schedule): reconcile absolute-time stack layer

docs/persistence-catalog.md

@@ -78,7 +78,7 @@ export type SessionEvent<T extends SessionEventType = SessionEventType> = {
 }[T]
 ```
 
-Sources: [`packages/core/session/src/types.ts:308`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:315`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:343`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:375`](../packages/core/session/src/types.ts)
+Sources: [`packages/core/session/src/types.ts:315`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:322`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:350`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:382`](../packages/core/session/src/types.ts)
 
 ## Events
 
@@ -175,7 +175,7 @@ Source: [`packages/interaction/user-approval/src/index.ts:67`](../packages/inter
 
 Types: [StreamChunk](subsystems/llm-streaming.md)
 
-Source: [`packages/core/session/src/types.ts:238`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:245`](../packages/core/session/src/types.ts)
 
 #### `assistant/message` — surface
 
@@ -191,7 +191,7 @@ Source: [`packages/core/session/src/types.ts:238`](../packages/core/session/src/
 
 Types: [TokenUsage](subsystems/llm-streaming.md)
 
-Source: [`packages/core/session/src/types.ts:245`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:252`](../packages/core/session/src/types.ts)
 
 ### `command/*`
 
@@ -479,7 +479,7 @@ Source: [`packages/plan/plan-mode/src/index.ts:52`](../packages/plan/plan-mode/s
 'request/context': RequestContext
 ```
 
-Source: [`packages/core/session/src/types.ts:281`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:288`](../packages/core/session/src/types.ts)
 
 #### `request/header` — log-only
 
@@ -491,7 +491,7 @@ Source: [`packages/core/session/src/types.ts:281`](../packages/core/session/src/
 'request/header': { header: EpochHeader; reason: RequestHeaderReason }
 ```
 
-Source: [`packages/core/session/src/types.ts:276`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:283`](../packages/core/session/src/types.ts)
 
 ### `sandbox/*`
 
@@ -558,7 +558,7 @@ Source: [`packages/schedule/tool-schedule/src/types.ts:202`](../packages/schedul
 'session/end-seed': Record<string, never>
 ```
 
-Source: [`packages/core/session/src/types.ts:304`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:311`](../packages/core/session/src/types.ts)
 
 #### `session/title` — log-only
 
@@ -594,7 +594,7 @@ Source: [`packages/session/session-title-llm/src/index.ts:43`](../packages/sessi
 'step/end': { turn: number; step: number }
 ```
 
-Source: [`packages/core/session/src/types.ts:228`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:235`](../packages/core/session/src/types.ts)
 
 #### `step/start` — log-only
 
@@ -603,7 +603,7 @@ Source: [`packages/core/session/src/types.ts:228`](../packages/core/session/src/
 'step/start': { turn: number; step: number }
 ```
 
-Source: [`packages/core/session/src/types.ts:226`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:233`](../packages/core/session/src/types.ts)
 
 ### `subagent/*`
 
@@ -633,7 +633,7 @@ Source: [`packages/subagent/subagent/src/descriptor.ts:37`](../packages/subagent
 
 Types: [TodoItem](subsystems/session.md)
 
-Source: [`packages/core/session/src/types.ts:271`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:278`](../packages/core/session/src/types.ts)
 
 ### `tool/*`
 
@@ -650,7 +650,7 @@ Source: [`packages/core/session/src/types.ts:271`](../packages/core/session/src/
 
 Types: [CallId](subsystems/core.md)
 
-Source: [`packages/core/session/src/types.ts:251`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:258`](../packages/core/session/src/types.ts)
 
 #### `tool/code-dispatch` — log-only
 
@@ -723,7 +723,7 @@ Source: [`packages/core/tools/src/code-mode.ts:33`](../packages/core/tools/src/c
 }
 ```
 
-Source: [`packages/core/session/src/types.ts:263`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:270`](../packages/core/session/src/types.ts)
 
 ### `turn/*`
 
@@ -743,7 +743,7 @@ Source: [`packages/core/session/src/types.ts:263`](../packages/core/session/src/
 
 Types: [TurnEndReason](subsystems/session.md)
 
-Source: [`packages/core/session/src/types.ts:224`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:231`](../packages/core/session/src/types.ts)
 
 #### `turn/start` — log-only
 
@@ -757,7 +757,7 @@ Source: [`packages/core/session/src/types.ts:224`](../packages/core/session/src/
 'turn/start': { turn: number }
 ```
 
-Source: [`packages/core/session/src/types.ts:215`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:222`](../packages/core/session/src/types.ts)
 
 ### `user/*`
 
@@ -774,7 +774,7 @@ Source: [`packages/core/session/src/types.ts:215`](../packages/core/session/src/
 'user/message': UserMessage
 ```
 
-Source: [`packages/core/session/src/types.ts:236`](../packages/core/session/src/types.ts)
+Source: [`packages/core/session/src/types.ts:243`](../packages/core/session/src/types.ts)
 
 ### `web/*`
 

docs/tool-catalog.md

@@ -831,7 +831,7 @@ create, edit, pause, and resume require direct-human root authority; complete an
 
 ### `schedule_create`
 
-Create one reminder in the current session. v1 accepts only a non-empty prompt and a positive safe-integer after_seconds delay. Delivery is session-local: the reminder runs on time only while this session is live and otherwise becomes overdue until the session is resumed.
+Create one reminder in the current session. Supply a non-empty prompt and exactly one selector: a positive safe-integer after_seconds delay, or at as a strict offset date-time or local date/time object. Delivery is session-local: the reminder runs on time only while this session is live and otherwise becomes overdue until the session is resumed.
 
 ```json
 {
@@ -844,11 +844,37 @@ Create one reminder in the current session. v1 accepts only a non-empty prompt a
     "after_seconds": {
       "type": "number",
       "description": "Positive safe-integer delay in seconds."
+    },
+    "at": {
+      "oneOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "object",
+          "additionalProperties": false,
+          "properties": {
+            "date": {
+              "type": "string"
+            },
+            "time": {
+              "type": "string"
+            },
+            "time_zone": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "date",
+            "time"
+          ]
+        }
+      ],
+      "description": "Absolute target as strict offset RFC 3339 or local date/time with optional IANA zone."
     }
   },
   "required": [
-    "prompt",
-    "after_seconds"
+    "prompt"
   ]
 }
 ```