/**
 * Persistent provider budget exhaustion (OpenAI `insufficient_quota`,
 * surfaced as an HTTP 429 whose body carries that code). Distinct from
 * the transient `LLM_RATE_LIMITED` throttle: quota exhaustion is
 * fail-fast (non-retryable) and is the signal a global AI-budget
 * breaker trips on.
 */
export declare const LLM_QUOTA_EXHAUSTED: "LLM_QUOTA_EXHAUSTED";
/** Transient provider throttling (HTTP 429, non-quota). Retryable. */
export declare const LLM_RATE_LIMITED: "LLM_RATE_LIMITED";
/** Transient provider failure (5xx, network). Retryable by default. */
export declare const LLM_TRANSIENT_ERROR: "LLM_TRANSIENT_ERROR";
/** Unrecoverable provider failure (e.g. 400/401/403). Not retryable. */
export declare const LLM_NON_RETRYABLE_ERROR: "LLM_NON_RETRYABLE_ERROR";
/** Retry loop exited without captured error context (defensive). */
export declare const LLM_UNKNOWN_ERROR: "LLM_UNKNOWN_ERROR";
/** Stage output failed local TypeBox `outputSchema` validation. */
export declare const OUTPUT_SCHEMA_INVALID: "OUTPUT_SCHEMA_INVALID";
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