A shared Bootstrap-only combobox that replaces the flat instance <select> on
Flow Debugger and Debug View (design docs/plans/2026-09-08-instance-picker-design.md,
plan task 2): a text field over a dropdown panel hosting TreeView across the
InstanceTreeBuilder forest, every area collapsed on open. Clicking an area row
toggles it, clicking an instance row selects it, closes the panel and raises
SelectedInstanceIdChanged. Outside clicks close through a transparent fixed
backdrop — the same pattern TreeView uses for its context menu, so no JavaScript.
A site change (new Areas/Instances references) closes the panel and clears the
field when the selection no longer resolves; a parent-driven SelectedInstanceId
change re-derives the field text while closed. ItemLabel customises row and field
text (Debug View wants a "(State)" suffix) while search still matches UniqueName.
TreeView gains one additive public ToggleExpanded(key) — the chevron's existing
private toggle, exposed so a consumer whose own NodeContent owns the label click
can toggle the branch.
Search filtering and keyboard handling land in task 3; _filter/Rebuild() are in
place for them.
Claude-Session: https://claude.ai/code/session_01NcMG6xXdsJbmD2wYAgkK29
Review follow-ups on f12ba2f9:
- An instance whose AreaId points at an area outside the supplied list was
silently dropped; it now surfaces at the root, mirroring the orphaned-area
rule, and stays filterable.
- InstanceTreeNode.Children is an IReadOnlyList over a private backing list,
composed by the builder through an internal AddChild — the record no longer
hands callers a mutable list.
- Extra tests: unknown-area instance (root + filterable), 3-level nesting,
a ParentAreaId cycle that must neither loop nor throw, and a filter that
matches instance names only (an area name match alone does not keep it).
Claude-Session: https://claude.ai/code/session_01NcMG6xXdsJbmD2wYAgkK29
Task 1 of the Instance Picker plan (docs/plans/2026-09-08-instance-picker.md).
Pure, DI-free builder that nests a site's areas by ParentAreaId and hangs each
area's instances beneath it, mirroring Topology's ordering (child areas first,
then that level's instances; OrdinalIgnoreCase sorts) with unparented instances
at the root after the root areas. Orphaned areas become roots, a case-insensitive
filter keeps matching instances plus their ancestors and drops empty branches,
and a ParentAreaId cycle can never recurse forever.
Claude-Session: https://claude.ai/code/session_01NcMG6xXdsJbmD2wYAgkK29
The trigger-cascade (Spawn) edge used a lightning-bolt marker IN PLACE of the arrowhead. On the upward
Tags→Site hop the bolt sat on top of the riser and read as a broken arrow (rig screenshot 2026-09-08).
Every connector now ends in an ordinary arrowhead; the bolt is a badge (circle + bolt) centred on the
connector's vertical run (FlowGraphView.SpawnBadgePoint, kept in step with OrthogonalPath/AsyncPath).
Same screenshot, second defect: the cascade spawned by "RecipeDownloadFlag = false" was drawn from the
LAST write of the burst (RecipeProcessedFlag) because all four writes share a millisecond and the
spawner rule was time-only. FlowGraphBuilder now prefers the parent's last AttributeWrite of the attribute
the child's triggerAttribute names (at or before the child, else the last such write); the time/position
rules remain the fallback when the child names no attribute or the parent never wrote it.
Verified live on the rebuilt rig (DelmiaSim01 / DelmiaReceiverSimulator): both spawn edges show an
arrowhead + badge, the second one originates from the RecipeDownloadFlag write. bUnit + builder tests
updated/added; Playwright FlowDebuggerTests 4/4.
Claude-Session: https://claude.ai/code/session_01NcMG6xXdsJbmD2wYAgkK29
ValueChange/Conditional scripts are fired by writing the trigger's attribute; every other
kind is a direct traced RouteToCall with a ParameterValueForm from the script's
ParameterDefinitions. New FlowDebugRunScriptCommand (Deployer-only, long-running),
IFlowDebugService script surface over the flattening pipeline, CLI flow-debug run-script,
verify-delmia-notifier step H2, docs. Design: docs/plans/2026-09-08-flow-debugger-script-entry-design.md.
Claude-Session: https://claude.ai/code/session_01NcMG6xXdsJbmD2wYAgkK29
Replaces the value-change (site/instance/attribute) entry with a script picker.
ValueChange/Conditional scripts keep the write-and-poll path with the attribute
derived from the trigger config; every other kind is invoked directly through the
traced RouteToCall path with a parameter form from the script's ParameterDefinitions.
New additive FlowDebugRunScriptCommand; run-value-change stays as the CLI escape hatch.
Claude-Session: https://claude.ai/code/session_01NcMG6xXdsJbmD2wYAgkK29
Joseph Doherty