Records the design decisions #3128's maintainer approval made a
condition: schema v1, the probe/artifact ownership model, and the
cleanup state machine that gates terminal transitions.
Also amends ADR-1671 with a RESERVED atom rather than a widening. The
vocabulary stays at 29 until #3128's implementation lands; the
reservation exists so the widening is a coordinated decision rather than
an organic edit found in review.
The load-bearing decision is the atom's shape. #3128's probe policy is
tri-state (adaptive|force|off), so gating on flag:--runtime-probes would
exclude the protocol section from every default invocation -- adaptive
carries no flag -- and the feature's primary mode could never activate.
That is admission gate (2)'s silent-exclusion failure arriving through a
different door: not a fact nobody computes, but a fact computed for only
one of three policies. The atom is therefore a resolved boolean folded
in cmdInitDebug.
Closes#3155
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
