# X_HIVE_EMPTY

## Means

a `hive()` split into zero members, so the fan-out ran nothing

## Typical cause

`split()` returned an empty list — usually a query behind it that matched no rows. Refused rather than returned, because `0 ok, 0 failed, 0 skipped` reads identically for "there was genuinely nothing to do" and "the source query came back empty and nobody noticed", and only the call site can tell them apart. A hive whose empty case is legitimate says so by not being called

## Fix

return at least one member input from the hive's `split()`, or guard the call site — `if (postIds.length > 0) await summariseBacklog({ postIds }, { ctx })`

[MCP and AI](/error-codes#mcp-and-ai)