Codex account: ChatGPT identity authenticated through Codex OAuth and returning seven-day usage data. Free accounts qualify; API-key identities do not. Avoid: API account, provider
Account slot: Position through which Pi authenticates one Codex account. Base slot is native Codex position; additional slots are numbered. Avoid: Account, pool member
Remaining quota: Unused percentage of seven-day Codex allowance and sole account-selection score. Avoid: Balance, normalized capacity
Quota window: Seven-day Codex usage period ending at reset time. Avoid: Rate limit, five-hour window
Usage snapshot: Remaining quota, subscription tier, and reset times observed for account slot at specific time. Avoid: Account state, credential state
Fresh usage snapshot: Usage snapshot fetched successfully less than five minutes ago. Sessions share fresh snapshots instead of repeating network requests. Avoid: Live quota, session cache
Subscription tier: Optional Codex plan class reported by usage service for display only. Tier does not affect account eligibility or selection. Avoid: Sub type, capacity multiplier