feat(slash-commands): usage footer modes

src/tui/commands.ts

@@ -5,7 +5,7 @@ const VERBOSE_LEVELS = ["on", "off"];
 const REASONING_LEVELS = ["on", "off"];
 const ELEVATED_LEVELS = ["on", "off"];
 const ACTIVATION_LEVELS = ["mention", "always"];
-const TOGGLE = ["on", "off"];
+const USAGE_FOOTER_LEVELS = ["off", "tokens", "full"];
 
 export type ParsedCommand = {
   name: string;
@@ -73,10 +73,10 @@ export function getSlashCommands(options: SlashCommandOptions = {}): SlashComman
         })),
     },
     {
-      name: "cost",
+      name: "usage",
       description: "Toggle per-response usage line",
       getArgumentCompletions: (prefix) =>
-        TOGGLE.filter((v) => v.startsWith(prefix.toLowerCase())).map((value) => ({
+        USAGE_FOOTER_LEVELS.filter((v) => v.startsWith(prefix.toLowerCase())).map((value) => ({
           value,
           label: value,
         })),
@@ -129,7 +129,7 @@ export function helpText(options: SlashCommandOptions = {}): string {
     `/think <${thinkLevels}>`,
     "/verbose <on|off>",
     "/reasoning <on|off>",
-    "/cost <on|off>",
+    "/usage <off|tokens|full>",
     "/elevated <on|off>",
     "/elev <on|off>",
     "/activation <mention|always>",

src/tui/gateway-chat.ts

@@ -52,7 +52,7 @@ export type GatewaySessionList = {
     inputTokens?: number | null;
     outputTokens?: number | null;
     totalTokens?: number | null;
-    responseUsage?: "on" | "off";
+    responseUsage?: "on" | "off" | "tokens" | "full";
     modelProvider?: string;
     label?: string;
     displayName?: string;

src/tui/tui-command-handlers.ts

@@ -317,23 +317,30 @@ export function createCommandHandlers(context: CommandHandlerContext) {
           chatLog.addSystem(`reasoning failed: ${String(err)}`);
         }
         break;
-      case "cost": {
+      case "usage": {
         const normalized = args ? normalizeUsageDisplay(args) : undefined;
         if (args && !normalized) {
-          chatLog.addSystem("usage: /cost <on|off>");
+          chatLog.addSystem("usage: /usage <off|tokens|full>");
           break;
         }
-        const current = state.sessionInfo.responseUsage === "on" ? "on" : "off";
-        const next = normalized ?? (current === "on" ? "off" : "on");
+        const currentRaw = state.sessionInfo.responseUsage;
+        const current =
+          currentRaw === "full"
+            ? "full"
+            : currentRaw === "tokens" || currentRaw === "on"
+              ? "tokens"
+              : "off";
+        const next =
+          normalized ?? (current === "off" ? "tokens" : current === "tokens" ? "full" : "off");
         try {
           await client.patchSession({
             key: state.currentSessionKey,
             responseUsage: next === "off" ? null : next,
           });
-          chatLog.addSystem(next === "on" ? "usage line enabled" : "usage line disabled");
+          chatLog.addSystem(`usage footer: ${next}`);
           await refreshSessionInfo();
         } catch (err) {
-          chatLog.addSystem(`cost failed: ${String(err)}`);
+          chatLog.addSystem(`usage failed: ${String(err)}`);
         }
         break;
       }

src/tui/tui-types.ts

@@ -34,7 +34,7 @@ export type SessionInfo = {
   inputTokens?: number | null;
   outputTokens?: number | null;
   totalTokens?: number | null;
-  responseUsage?: "on" | "off";
+  responseUsage?: "on" | "off" | "tokens" | "full";
   updatedAt?: number | null;
   displayName?: string;
 };