Errors
EVIDENCE_SUBJECT_REQUIRED
Evidence authoring had no explicit or active execution subject.
What failed
evidence.record() could not resolve the execution or artifact being described.
Retryability
Not retryable. The same call still has no subject.
The diagnostic contains no ambient execution or caller input.
Fix
Call it inside the execution it describes or pass an exact subject
explicitly. Do not infer a verification subject from span nesting or time.