feat(schedule): add fixed-rate reminders

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/*`
 
@@ -526,7 +526,7 @@ Source: [`packages/sandbox/sandbox-policy/src/session-mode.ts:33`](../packages/s
 'schedule/change': ScheduleChange
 ```
 
-Source: [`packages/schedule/tool-schedule/src/types.ts:183`](../packages/schedule/tool-schedule/src/types.ts)
+Source: [`packages/schedule/tool-schedule/src/types.ts:242`](../packages/schedule/tool-schedule/src/types.ts)
 
 ### `session/*`
 
@@ -558,7 +558,7 @@ Source: [`packages/schedule/tool-schedule/src/types.ts:183`](../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. 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.
+Create one reminder in the current session. Supply a non-empty prompt and exactly one selector: a positive safe-integer after_seconds delay, at as a strict offset date-time or local date/time object, or safe-integer every_seconds of at least 300. 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
 {
@@ -845,6 +845,10 @@ Create one reminder in the current session. Supply a non-empty prompt and exactl
       "type": "number",
       "description": "Positive safe-integer delay in seconds."
     },
+    "every_seconds": {
+      "type": "number",
+      "description": "Fixed-rate safe-integer interval in seconds, at least 300."
+    },
     "at": {
       "oneOf": [
         {