fix(account-pool): recover from temporary OAuth refresh outages - #3115
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## Human comments ## What was wrong Conversations could switch accounts under load even while their current account was healthy. Losing a warm prompt cache can increase uncached input and latency. Child sessions also missed their parent’s account affinity, and Codex session headers were dropped. ## What changed Keep conversations on eligible accounts and let children inherit an eligible parent’s account. A child can fail over independently. Preserve native session headers, cache keys, and encrypted payloads so routing does not unnecessarily disrupt cache reuse. ## How you verified Quota tests cover failover, staying on the replacement account, and recovery after all accounts exhaust. Both providers’ tests fail with affinity disabled. All 229 plugin tests, typecheck, lint, and formatting passed. Synthetic tests do not measure live cache improvement. Fork branches are stacked; upstream PR diffs are cumulative. <!-- GitButler Footer Boundary Top --> --- This is **part 4 of 4 in a stack** made with GitButler: - <kbd> 4 </kbd> #3117 👈 - <kbd> 3 </kbd> #3116 - <kbd> 2 </kbd> #3115 - <kbd> 1 </kbd> #3112 <!-- GitButler Footer Boundary Bottom --> > AGENT GENERATED
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Human comments
What was wrong
A brief OAuth refresh outage could leave an account permanently unusable. Sessions then received quota errors even when the account still had a valid access token, requiring manual recovery.
What changed
Keep sessions running on valid tokens during temporary refresh outages and retry automatically with backoff. If every usable token has expired, return a temporary error instead of permanently disabling the accounts.
How you verified
Six regressions failed before and pass after. All 86 plugin tests, typecheck, lint, and formatting passed.
Fork branches are stacked; upstream PR diffs are cumulative.
This is part 2 of 4 in a stack made with GitButler: