Symptom

TargetingWiringEditor (the universal sources-only wiring widget) existed but was wired into only Pin and DataPoint. Every other node type had a bespoke, drifted source/target loop (Compute, Calc, LogicGate, Lambda, WebHook, SMTP, MQTT), a verb-only editor (Button), or no wiring UI at all (Trigger family, Cron, IncomingWebHook, TaskList, …). Users had no consistent way to wire sources across the swarm.

Root cause

The universal widget was introduced in Phase 3 Stage 1/Stage 2 but the rollout to every editor was deferred. Each editor accumulated its own showSourceNodeList/showTargetNodeList state machine and SourceListWithBackNavigation branches, and several called the deprecated 3-tab SourceList or ExecutionSourceSelector directly rather than going through the unified widget.

Fix

• Replaced bespoke showSourceNodeList/showTargetNodeList + SourceListWithBackNavigation branches with TargetingWiringEditor in: EditCompute, EditCalc, EditLogicGate, EditLambda, EditOutboundWebHook, EditSMTP, EditMqtt, EditButton.
• Added TargetingWiringEditor to editors that had no wiring UI: EditTrigger, EditCron, EditIncomingWebHook, EditTaskList, EditColorTrigger, EditFilter, EditLLM, EditBackup, EditGraph, EditProject, EditPeer, EditSerialDevice, EditServer, EditJournal.
• Removed standalone ExecutionSourceSelector calls from all editors (the widget includes “Invoked By” internally).
• For Calc: kept the calculator keypad (formula math) but removed the SET_TARGET and ADD_SOURCE keypad buttons (formula-variable node refs are D7 deferred).
• For LogicGate: flat sources list via the widget; runtime uses positional sources[0]/sources[1] (D7 deferred: input-type enforcement).
• The targets editing affordance is removed from all editors; the targets field and its processor consumers are left intact until Phase 4.

Prevention

• D4 (conscious): targets is hidden in the editor but survives in the data model until Phase 4 reworks the 8 processors that read it. Any new editor must NOT expose a targets picker.
• D7 (conscious, pre-release): Calculation formula-variable node refs (embedded [host:nodeId] in formula string) are the deferred formula builder — fix before release. LogicGate input-type enforcement and per-source role UI are also deferred pre-release.
• When adding a new node type, TargetingWiringEditor must be the only source-wiring surface in its Edit composable — never hand-roll showSourceNodeList state machines again.
• ExecutionSourceSelector is superseded by the “Invoked By” section inside TargetingWiringEditor; do not call it directly from new editors.