cache

var (
	// ErrIneligible reports a request whose identity is not cache-safe.
	ErrIneligible = errors.New("request is not eligible for response caching")
	// ErrAccountRequired reports a request without account identity.
	ErrAccountRequired = errors.New("cache account ID is required")
	// ErrGenerationRequired reports a request without catalog identity.
	ErrGenerationRequired = errors.New("catalog generation ID is required")
	// ErrMutableMedia reports a remote media input that can change without a
	// new key.
	ErrMutableMedia = errors.New("remote media input is mutable")
	// ErrUnknownExtension reports provider semantics outside the canonical identity.
	ErrUnknownExtension = errors.New("provider extension semantics are not cache-safe")
	// ErrInvalidJSONContract reports an invalid tool or output schema.
	ErrInvalidJSONContract = errors.New("request JSON contract is invalid")
)

var (
	// ErrStoreRequired reports an absent response-cache byte store.
	ErrStoreRequired = errors.New("response-cache store is required")
	// ErrCorruptRecord reports invalid durable response-cache data.
	ErrCorruptRecord = errors.New("response-cache record is invalid")
	// ErrKindMismatch reports a record payload that does not match its kind.
	ErrKindMismatch = errors.New("response-cache record kind does not match")
	// ErrEmptyResponse reports a completion with nothing a later request
	// can reuse. Caching one would replay a provider failure as a success.
	ErrEmptyResponse = errors.New("response-cache refuses an empty completion")
)

var (
	// ErrNoStreamEvents reports an empty canonical event sequence.
	ErrNoStreamEvents = errors.New("stream has no canonical events")
	// ErrUnsupportedContent reports a content part that canonical replay
	// cannot represent. A part now replays whatever kind it names, so the
	// remaining case is a malformed part: one that claims to be text while
	// carrying a media payload, which no reader can resolve without
	// guessing which half to believe.
	ErrUnsupportedContent = errors.New("cached stream content part is malformed")
)