Instead of exponential backoff guesses on Codex 429, probe the WHAM
usage API to determine real availability and write accurate cooldowns.
- Burst/concurrency contention: 15s circuit-break
- Genuine rate limit: proportional to real reset time (capped 2-4h)
- Expired token: 12h cooldown
- Dead account: 24h cooldown
- Probe failure: 30s fail-open
This prevents cascade lockouts when multiple agents share a pool of
Codex profiles, and avoids wasted retries on genuinely exhausted
profiles.
Closes#26329, relates to #1815, #1522, #23996, #54060
Co-authored-by: ryanngit <ryanngit@users.noreply.github.com>
The secondary window label logic treated any window >= 24h as "Day",
but Codex plans can have a weekly (604800s / 168h) quota window.
The reset timer showed "resets 2d 4h" while the label said "Day",
which was confusing.
Now windows >= 168h are labeled "Week", >= 24h remain "Day", and
shorter windows show the hour count.
Closes#25812
Co-authored-by: Cursor <cursoragent@cursor.com>
