2 files changed, 49 insertions, 1 deletions
diff --git a/src/features/tabs/tabs-store.svelte.ts b/src/features/tabs/tabs-store.svelte.ts
index acf56fe..5ed08d4 100644
--- a/src/features/tabs/tabs-store.svelte.ts
+++ b/src/features/tabs/tabs-store.svelte.ts
@@ -1,3 +1,4 @@
+import type { NamedAgentSelectionSnapshot } from "../named-agents";
 import type { Tab, TabsState } from "./tabs";
 import {
   initialState,
@@ -7,6 +8,7 @@ import {
   openTab as reduceOpenTab,
   selectTab as reduceSelectTab,
   setModel as reduceSetModel,
+  setSnapshot as reduceSetSnapshot,
   setTitle as reduceSetTitle,
   setWorkspaceId as reduceSetWorkspaceId,
   activeTab as selectActiveTab,
@@ -28,6 +30,11 @@ export interface TabsStore {
   selectTab(conversationId: string): void;
   closeTab(conversationId: string): void;
   setModel(conversationId: string, model: string): void;
+  /**
+   * Set (or clear, with null) a tab's Named Agent snapshot (plan §7). The caller
+   * keeps the snapshot's captured `model` in sync with the tab's `model`.
+   */
+  setSnapshot(conversationId: string, snapshot: NamedAgentSelectionSnapshot | null): void;
   setTitle(conversationId: string, title: string): void;
   setWorkspaceId(conversationId: string, workspaceId: string): void;
 }
@@ -68,6 +75,9 @@ export function createTabsStore(storage: TabsStorage): TabsStore {
     setModel(conversationId: string, model: string): void {
       apply(reduceSetModel(state, conversationId, model));
     },
+    setSnapshot(conversationId: string, snapshot: NamedAgentSelectionSnapshot | null): void {
+      apply(reduceSetSnapshot(state, conversationId, snapshot));
+    },
     setTitle(conversationId: string, title: string): void {
       apply(reduceSetTitle(state, conversationId, title));
     },
diff --git a/src/features/tabs/tabs.ts b/src/features/tabs/tabs.ts
index 9fc9306..ff7bb4f 100644
--- a/src/features/tabs/tabs.ts
+++ b/src/features/tabs/tabs.ts
@@ -1,9 +1,18 @@
+import type { NamedAgentSelectionSnapshot } from "../named-agents";
+
 export interface Tab {
   readonly conversationId: string;
   readonly model: string;
   readonly title: string;
   /** The workspace this tab belongs to (the workspace's URL slug). */
   readonly workspaceId: string;
+  /**
+   * The Named Agent selection snapshot, when this conversation was selected via
+   * a Named Agent (plan §7). Retained so the conversation keeps showing the
+   * friendly label (and its captured raw model) even after the Named Agent is
+   * renamed/removed. Absent for a raw model selection.
+   */
+  readonly snapshot?: NamedAgentSelectionSnapshot;
 }
 
 export interface TabsState {
@@ -73,7 +82,36 @@ export function closeTab(state: TabsState, conversationId: string): TabsState {
 }
 
 export function setModel(state: TabsState, conversationId: string, model: string): TabsState {
-  const tabs = state.tabs.map((t) => (t.conversationId === conversationId ? { ...t, model } : t));
+  // A raw-model selection clears any Named Agent snapshot (a raw selection is
+  // not "via a Named Agent"). Omit the key entirely (`exactOptionalPropertyTypes`).
+  const tabs = state.tabs.map((t) =>
+    t.conversationId !== conversationId ? t : omitSnapshot({ ...t, model }),
+  );
+  return { tabs, activeConversationId: state.activeConversationId };
+}
+
+/** Drop the optional `snapshot` key (used to clear a Named Agent selection). */
+function omitSnapshot(tab: Tab): Tab {
+  if (!("snapshot" in tab)) return tab;
+  const { snapshot: _omit, ...rest } = tab;
+  void _omit;
+  return rest;
+}
+
+/**
+ * Set (or clear) a tab's Named Agent selection snapshot (plan §7). The snapshot's
+ * captured `model` should equal the tab's `model` (the resolved raw model); this
+ * reducer does not rewrite `model` — the caller keeps them in sync. Pass `null`
+ * to clear (a raw model selection).
+ */
+export function setSnapshot(
+  state: TabsState,
+  conversationId: string,
+  snapshot: NamedAgentSelectionSnapshot | null,
+): TabsState {
+  const tabs = state.tabs.map((t) =>
+    t.conversationId === conversationId ? { ...t, ...(snapshot === null ? {} : { snapshot }) } : t,
+  );
   return { tabs, activeConversationId: state.activeConversationId };
 }