Prod decode was dominated by the DataImpulse proxy: ~50% of ports dead at any
moment, 57% of captured tokens discarded by validation, the dead-port slot
never evicted (invalidateSession only fired on 401/403, never on transport
timeout), and a cold pool blocked the user inline on a multi-second capture.
pcat sub-timing was p50 8.3s / p90 56s, blowing the 25s decode budget.
Verified on prod: the TWS- token is NOT request-time IP-bound (0 auth 401/403
across thousands of calls; a token captured on one IP replays 200 through
arbitrary fresh residential IPs). So the proxy can rotate freely.
- Transport swap to Floxy residential (PCAT_PROXY_PROVIDER=floxy|dataimpulse|none).
Call/validate leg = a fresh exit IP per request (max IP diversity → min per-IP
ban); capture leg = a sticky session per Playwright attempt. DataImpulse +
direct kept as env fallbacks. Token decoupled from the slot (proxyPort removed).
- Prune 3 zero-yield JWT sites (knkauto/autodo.kz/flynestauto — 0 captures, ~80%
of attempts); add PCAT_JWT_SITES env override.
- Lower catalog-scrape timeout 30s→10s (env-tunable) so a slow IP aborts within
budget and the retry rotates to a fresh IP.
- Cold-pool fast-fail on the decode race: warm in background, let EMEX/PL24
answer instead of blocking inline; treated as a transient miss (no neg-cache).
- Evict a token after N consecutive transport failures on rotating IPs (the
dead-slot bug); reset on any 2xx.
- PCAT circuit breaker mirroring PL24 (transient-only; cold-skip neutral; skip
marks outcome.transient so a pcat-only VIN isn't negative-cached 30m).
Typecheck + Biome + unit tests (categories/vehicles) green. Default flips pcat
to Floxy on next deploy; instant rollback via PCAT_PROXY_PROVIDER.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Semih Yesilyurt
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