## Why
ENT26 plans are billed directly in dollars, so credit estimates and credit-weighted breakdowns do not describe their thread usage.
## What changed
- Expose optional `nativeUsageUsdMicros` in app-server `ThreadUsage` responses and generated schemas and SDK types. Missing native usage means unknown, not zero.
- Enable ENT26 usage fetching and display native dollar amounts in `/status`, the status line, terminal titles, and the agents overview. Hide credits and omit credit-weighted `/status` breakdowns for these plans.
- Use native dollar amounts when tracking post-turn usage settlement for ENT26 plans.
## Testing
Add coverage for native usage forwarding, ENT26 billing displays, and settlement polling with stale, missing, or zero dollar amounts.
GitOrigin-RevId: ca8ea98141a66bdf0a27feb9f58f67822b821f5f
## What changed
- Extend `account/usage/read` with an optional `threadId` request and a
backward-compatible `threadUsage` response containing estimated credits,
optional USD cost, and model, reasoning, speed, and token breakdowns.
- Fetch thread usage for eligible Business and Enterprise plans when `/status`
is opened, then update the rendered status card asynchronously.
- Preserve terminal scrollback when replacing a visible status-card tail, and
append a refreshed card when the original tail can no longer be updated.
## Testing
- Add app-server coverage for authentication, canonical thread IDs,
unavailable billing routes, and malformed IDs.
- Add TUI coverage for usage formatting, stale responses, retries, history
updates, terminal reflow, and scrollback preservation.
GitOrigin-RevId: 49300914b3fba917c0f08e8595363e04e5ba6d37
## Why
Token activity is useful account-level context, but terminal clients
need a supported app-server path to fetch it without reaching into
ChatGPT backend details directly. The API should also live under the
broader account usage umbrella so future usage surfaces can be added
without proliferating user-facing concepts.
## What Changed
- Add `codex-backend-client` support for the ChatGPT profile token-usage
payload.
- Add the v2 `account/usage/read` app-server RPC.
- Map lifetime usage, peak daily usage, streak, longest task duration,
and daily buckets into app-server protocol types.
- Gate the request on Codex-backend auth, which supports ChatGPT auth
tokens and AgentIdentity.
- Regenerate the app-server JSON and TypeScript schema fixtures.
## Token Count Source
`account/usage/read` returns the token-usage aggregate supplied by the
ChatGPT profile backend. App-server maps that backend-owned aggregate
into protocol fields; it does not recompute cached-token treatment,
usage multipliers, or raw input/output totals locally.
## Stack
1. feat(app-server): expose account token usage [1 of 2] (this PR)
2. [#25345](https://github.com/openai/codex/pull/25345) feat(tui): add
token activity command [2 of 2]
## How to Test
1. Start an app-server client from this branch while authenticated with
ChatGPT or AgentIdentity.
2. Call `account/usage/read`.
3. Confirm the response includes `summary` and `dailyUsageBuckets`.
4. Also verify a session without Codex-backend auth receives the
existing auth error path.
Targeted tests:
- `just test -p codex-backend-client -p codex-app-server-protocol -p
codex-app-server`
- `just write-app-server-schema`
jif