refactor(agents): Drop the session cost from the context usage

src/features/agents/SessionEditor.tsx

@@ -172,7 +172,6 @@ function Header({ task, entries, head }: { task: AgentTask; entries: AgentEntry[
   );
 }
 
-/** Context window use: "12%", the numbers (and cost) in the tooltip. */
 /** Context use (when the agent reports it) and the time spent on the task. */
 function Meters({ task, entries }: { task: AgentTask; entries: AgentEntry[] | null }) {
   const tx = useTx();
@@ -188,6 +187,7 @@ function Meters({ task, entries }: { task: AgentTask; entries: AgentEntry[] | nu
   );
 }
 
+/** Context window use: "12%", the numbers in the tooltip. */
 function Usage({ usage }: { usage: AgentUsage }) {
   const label = usageLabel(usage);
   return (

src/features/agents/agents.test.ts

@@ -124,9 +124,9 @@ describe("agent composer", () => {
       "eye",
       "lock",
     ]);
-    expect(usageLabel({ used: 24_000, size: 200_000, cost: 0.4, currency: "USD" })).toEqual({
+    expect(usageLabel({ used: 24_000, size: 200_000 })).toEqual({
       short: "12%",
-      detail: "24k / 200k tokens · $0.40",
+      detail: "24k / 200k tokens",
     });
     expect(imageFromDataUrl("data:image/png;base64,AAA", "a.png")).toEqual({ mimeType: "image/png", data: "AAA", name: "a.png" });
     expect(imageFromDataUrl("data:text/plain;base64,AAA")).toBeNull();
@@ -135,7 +135,7 @@ describe("agent composer", () => {
 
 describe("usage meters", () => {
   it("formats token counts", () => {
-    expect(usageLabel({ used: 83_100, size: 1_000_000, cost: null, currency: null }).detail).toBe("83.1k / 1M tokens");
+    expect(usageLabel({ used: 83_100, size: 1_000_000 }).detail).toBe("83.1k / 1M tokens");
   });
 
   it("adds up the time spent on turns", () => {

src/features/agents/composerModel.ts

@@ -131,8 +131,7 @@ export function nextValue(option: AgentConfigOption, current = option.current):
 /** "12%" of the context window and a tooltip with the numbers. */
 export function usageLabel(u: AgentUsage): { short: string; detail: string } {
   const pct = Math.min(100, Math.round((u.used / u.size) * 100));
-  const cost = u.cost != null ? ` · ${costLabel(u)}` : "";
-  return { short: `${pct}%`, detail: tx`${tokens(u.used)} / ${tokens(u.size)} tokens${cost}` };
+  return { short: `${pct}%`, detail: tx`${tokens(u.used)} / ${tokens(u.size)} tokens` };
 }
 
 /** `850`, `83.1k`, `1M`. */
@@ -142,12 +141,6 @@ function tokens(n: number): string {
   return `${Math.round(n)}`;
 }
 
-/** Session cost (`$4.23`), when the agent reports one. */
-function costLabel(u: AgentUsage): string | null {
-  if (u.cost == null) return null;
-  return `${u.currency === "USD" || !u.currency ? "$" : `${u.currency} `}${u.cost.toFixed(2)}`;
-}
-
 /** Time the agent spent on the task's turns; a running one counts up to `now` (`null` when idle). */
 export function workTime(entries: readonly AgentEntry[], now: number | null): number {
   const users = entries.filter((e): e is Extract<AgentEntry, { type: "user" }> => e.type === "user");