12 — No-Blind-Spot-As-Zero Guard (v_rp_no_blind_spot_as_zero_guard)

The contract that the UI cannot silently render an unknown/partial/stale/host-only source as zero. 7 rules, all PASS.

rule	pass	meaning
unknown_source_not_zero	✅	No UNKNOWN-scope source carries observed_count=0 (ui_route is NULL)
partial_source_badged	✅	Every PARTIAL source carries a PARTIAL UI badge
stale_source_warned	✅	Every STALE/STALE_PARTIAL source shows a warning
host_only_not_disappeared	✅	≥4 host-only trigger classes remain in the universe
db_only_trigger_label_persists	✅	DB_ONLY trigger label persists
missing_adapter_raises	✅	No instrumented source is MISSING_ADAPTER
rp_visible_triggers_honest_zero	✅	Triggers report RP-visible=0 honestly (AX-TRIGGER unregistered) — a true zero, not a hidden one

The key distinction

There are two kinds of zero. A hidden zero (a source that exists but renders as 0 because the view can't see it) is forbidden. An honest zero (RP-visible triggers = 0 because the axis is genuinely unregistered) is required and explained. This guard enforces the first and certifies the second. It is the gate the UI/operator pipeline checks before trusting any count.