Errors
DEFER_LIMIT_EXCEEDED
defer() exceeded host callback count, nesting, or related bounds.
What failed
Registration exceeded a host-declared bound (callback count, nesting depth, or related limit) before the callback was invoked.
Why
Hosts keep deferred work bounded. Unlimited registration can outlive the process guarantee and starve shutdown.
What still works
Already accepted registrations drain within concurrency and deadline limits. Named Runtime work is not a substitute for unbounded inline fan-out.
Fix
Reduce the number of inline registrations, collapse work into fewer callbacks, or move high-volume work to named Runtime targets. V1 does not expose public tuning knobs; effective limits are fixed per host policy.