docs: document embedded agent runtime

docs/session.md

@@ -5,7 +5,7 @@ read_when:
 ---
 # Session Management
 
-Clawdis treats **one session as primary**. By default the canonical key is `main` for every direct chat; no configuration is required. You can rename it via `inbound.reply.session.mainKey` if you really want, but there is still only a single primary session. Older/local sessions can stay on disk, but only the primary key is used for desktop/web chat and direct agent calls.
+Clawdis treats **one session as primary**. By default the canonical key is `main` for every direct chat; no configuration is required. You can rename it via `inbound.session.mainKey` if you really want, but there is still only a single primary session. Older/local sessions can stay on disk, but only the primary key is used for desktop/web chat and direct agent calls.
 
 ## Gateway is the source of truth
 All session state is **owned by the gateway** (the “master” Clawdis). UI clients (macOS app, WebChat, etc.) must query the gateway for session lists and token counts instead of reading local files.
@@ -25,7 +25,7 @@ All session state is **owned by the gateway** (the “master” Clawdis). UI cli
 - Group chats still isolate state with `group:<jid>` keys; do not reuse the primary key for groups.
 
 ## Lifecyle
-- Idle expiry: `inbound.reply.session.idleMinutes` (default 60). After the timeout a new `sessionId` is minted on the next message.
+- Idle expiry: `inbound.session.idleMinutes` (default 60). After the timeout a new `sessionId` is minted on the next message.
 - Reset triggers: exact `/new` (plus any extras in `resetTriggers`) start a fresh session id and pass the remainder of the message through.
 - Manual reset: delete specific keys from the store or remove the JSONL transcript; the next message recreates them.
 
@@ -34,14 +34,12 @@ All session state is **owned by the gateway** (the “master” Clawdis). UI cli
 // ~/.clawdis/clawdis.json
 {
   inbound: {
-    reply: {
-      session: {
-        scope: "per-sender",      // keep group keys separate
-        idleMinutes: 120,
-        resetTriggers: ["/new"],
-        store: "~/.clawdis/sessions/sessions.json",
-        mainKey: "main"           // optional rename; still a single primary
-      }
+    session: {
+      scope: "per-sender",      // keep group keys separate
+      idleMinutes: 120,
+      resetTriggers: ["/new"],
+      store: "~/.clawdis/sessions/sessions.json",
+      mainKey: "main"           // optional rename; still a single primary
     }
   }
 }