Module error_codes 

Canonical error codes emitted while opening a client route.

Error frames remain extensible strings, but these daemon-owned route-open outcomes need identical spelling across the daemon and SDK retry policies.

Constants

MODULE_NO_PROTOCOL

The target module is declared as speaking no subc wire protocol (protocol: "none" in daemon config), so it has no control lane and can never accept a route. The daemon supervises its process and nothing else.

MODULE_RELOADING

The target module’s endpoint is draining for a reload, restart or disable.

MODULE_REMOVED

MODULE_TIMEOUT

MODULE_WARMING

STALE_ROUTE_EPOCH

TARGET_UNAVAILABLE

UNKNOWN_CHANNEL

UNKNOWN_MODULE

Functions

is_established_route_dead

Whether the caller should evict this established route, reopen it, and resend the request once. Consumers mapping route death to their own custody, provider, or suspect verdict keep their own named code lists; sharing this predicate for those meanings can change a verdict on a protocol bump (prefrontal#59).

is_retryable_route_open

Whether a route.open refusal carrying code may be retried in place within the caller’s deadline, or is terminal for the target as named.