Task:  T-1850
Name:  tags:[arc:*] → arc_id one-shot migration (T-NEW-3)
File:  .tasks/completed/T-1850-tagsarc--arcid-one-shot-migration-t-new-.md

PROPOSED (advisory)
DRIVER NAME           WEIGHT SCORE CONTRIB
--------------------------------------------------
D1     Antifragility       9     4      36
D2     Reliability         7     4      28
D3     Usability           5     4      20
D4     Portability         3     2       6
F1     t2079probe          3     -       -
--------------------------------------------------
TOTAL                          90   (norm: 0.75)

Cost components (CONFIRMED):
  cost_estimate: absent. Set in task frontmatter to enable ranking.
