pfs guideline-facts writes pfs.code_guideline_fact: selection basis, MDM level,
time thresholds, deletions between editions, copy-guarded scope points and the
Feb 2021 Panel action, each cited by (edition, page). stance-v5 states the CPT
change in the coding event and drops keyword-only coding events; v5 ships on
the golden set (recall 14/27, direction 11/14 vs v4 13/27, 10/13).
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