Consolidates the 429-quota-classifier cluster on top of the merged #93419
Anthropic core. Three independent contributor findings salvaged into one
coherent change to the single 429 branch:
- Broaden the 429 usage-limit check from the narrow 'usage limit' string to
the full _USAGE_LIMIT_PATTERNS ('quota', 'limit exceeded', 'key limit
exceeded') and add _BILLING_PATTERNS detection on 429 ('insufficient
credits' wrapped in a 429 instead of 402), guarded by a _RATE_LIMIT_PATTERNS
exclusion so an explicit 'Rate limit exceeded' never promotes to
non-retryable billing. (credit @Pluviobyte, #39441 — earliest submitter)
- Add 'resets in' to the transient signals: Codex's 'Weekly usage limit
reached. Resets in 6hr 29min.' wrongly read as terminal billing because
main only had 'reset in' (no substring match). (credit @LeonSGP43, #63021)
- Add 'reset after' / 'available in' / 'per minute' / 'per second' transient
signals. (credit @jtstothard, #74785)
Supersedes #65633 (defective branch placement, no tests). The aux-client
path already covers these shapes (_is_payment_error catches weekly/quota
walls; _is_rate_limit_error treats 'resets in' as transient), so no change
there.
Tests: 6 new cases (generic quota wall, insufficient-credits 429, rate-limit
guard, Codex resets-in, extra transient phrases). Guard sabotage-verified.
Co-authored-by: Pluviobyte <Pluviobyte@users.noreply.github.com>
Co-authored-by: LeonSGP43 <LeonSGP43@users.noreply.github.com>
Co-authored-by: jtstothard <jtstothard@users.noreply.github.com>
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