02 — PXT Grouping Rule Closure (Track A)

The 10 NEEDS_GROUPING nodes are all AX-PXT aggregation nodes (count>1, has_children=false) backed by v_process_trigger_actionability_ledger. v1 jumped straight to SHOW_SUBSTRATE (the single ledger summary row) with no per-object drill. v2 binds each to its real per-object source so the drill becomes dynamic: count>1 → DRILL_GROUPS → groups → SHOW_SUBSTRATE.

Source binding (verified against the ledger's own view definition)

• TRIG:* counts are live from v_ax_process_trigger_crosscheck; per-object rows live in v_trigger_universe_census (trigger_class matches exactly).
• PROC:* ledger counts are static literals; bound to live sources below.

Node	grouping_class	children source	group_by	groups	child_total
TRIG:db_dml_trigger	GROUP_BY_SOURCE_OBJECT	v_trigger_universe_census	on_object	177	408 (LARGE_GROUP)
TRIG:event_type	GROUP_BY_SOURCE_OBJECT	v_trigger_universe_census	on_object	6	52
TRIG:dot_cron	GROUP_BY_SOURCE_OBJECT	v_trigger_universe_census	on_object	22	42
TRIG:job_queue	GROUP_BY_TRIGGER_NAME	v_trigger_universe_census	trigger_name	8	8
TRIG:dot_dual	GROUP_BY_SOURCE_OBJECT	v_trigger_universe_census	on_object	5	6
TRIG:dot_event	GROUP_BY_SOURCE_OBJECT	v_trigger_universe_census	on_object	4	5
TRIG:dot_on-deploy	GROUP_BY_SOURCE_OBJECT	v_trigger_universe_census	on_object	4	4
PROC:new_candidates	GROUP_BY_PROCESS_CANDIDATE	wf_process_candidate	candidate_code	6	50
PROC:owner_gated_runtime	GROUP_BY_SOURCE_OBJECT	wf_orphan_remediation_queue	object_key	11	11
PROC:residual_reconcile	GROUP_BY_RESIDUAL_STATE	v_workflow_residual_evidence_hardening_v4	residual_state_v4	7	23

Trigger child totals sum to 525 = the full trigger universe census. PROC totals match live sources (6 PROCESS_CANDIDATE rows, 11 docker_service_no_candidate, 23 residual rows in 7 states).

Honest drift surfaced (not papered over)

PROC:residual_reconcile ledger literal = 8, but live v_workflow_residual_evidence_hardening_v4 shows only 2 in AWAITING_OWNER_RECONCILE (rest RESOLVED_*). Flagged LEDGER_LITERAL_STALE in the rule. TRIG:db_dml_trigger flagged LARGE_GROUP (177 groups; browsable but review-only infra).

Result

missing_grouping 10 → 0. None remained NEEDS_GROUPING_BY_DESIGN — every node has a real grouping rule. Owner blockers preserved as status, not removed.