fix(agent-graph): stabilize member slot layout

packages/agent-graph/src/constants/canvas-constants.ts

@@ -262,6 +262,8 @@ export const KANBAN_ZONE = {
   columnWidth: 180,
   /** Row height: pill (36) + gap (10) */
   rowHeight: 46,
+  /** Space reserved for column header label */
+  headerHeight: 20,
   /** Zone starts this far below member node center */
   offsetY: 70,
   /** Column sequence: pending → wip → done → review → approved */

packages/agent-graph/src/hooks/useGraphSimulation.ts

@@ -9,6 +9,7 @@ import {
   translateSlotFrame,
   validateStableSlotLayout,
   type StableSlotLayoutSnapshot,
+  type StableRect,
   type SlotFrame,
 } from '../layout/stableSlots';
 import { KanbanLayoutEngine } from '../layout/kanbanLayout';
@@ -47,7 +48,7 @@ export interface UseGraphSimulationResult {
     displacedAssignment?: GraphOwnerSlotAssignment;
   } | null;
   getLaunchAnchorWorldPosition: (leadNodeId: string) => { x: number; y: number } | null;
-  getActivityAnchorWorldPosition: (nodeId: string) => { x: number; y: number } | null;
+  getActivityWorldRect: (nodeId: string) => StableRect | null;
   getExtraWorldBounds: () => WorldBounds[];
 }
 
@@ -65,7 +66,7 @@ export function useGraphSimulation(): UseGraphSimulationResult {
   const lastValidSnapshotByTeamRef = useRef(new Map<string, StableSlotLayoutSnapshot>());
   const dragOwnerPositionsRef = useRef(new Map<string, { x: number; y: number }>());
   const launchAnchorPositionsRef = useRef(new Map<string, { x: number; y: number }>());
-  const activityAnchorPositionsRef = useRef(new Map<string, { x: number; y: number }>());
+  const activityRectByNodeIdRef = useRef(new Map<string, StableRect>());
   const extraWorldBoundsRef = useRef<WorldBounds[]>([]);
 
   const prevNodeIdsRef = useRef(new Set<string>());
@@ -91,7 +92,7 @@ export function useGraphSimulation(): UseGraphSimulationResult {
           lastValidSnapshotByTeamRef,
           dragOwnerPositionsRef,
           launchAnchorPositionsRef,
-          activityAnchorPositionsRef,
+          activityRectByNodeIdRef,
           extraWorldBoundsRef,
         });
         return;
@@ -111,7 +112,7 @@ export function useGraphSimulation(): UseGraphSimulationResult {
           lastValidSnapshotByTeamRef,
           dragOwnerPositionsRef,
           launchAnchorPositionsRef,
-          activityAnchorPositionsRef,
+          activityRectByNodeIdRef,
           extraWorldBoundsRef,
           fillMissingFallbackPositions: true,
         });
@@ -123,7 +124,7 @@ export function useGraphSimulation(): UseGraphSimulationResult {
       nodes: state.nodes,
       layoutSnapshotRef,
       launchAnchorPositionsRef,
-      activityAnchorPositionsRef,
+      activityRectByNodeIdRef,
       extraWorldBoundsRef,
     });
   }, []);
@@ -220,7 +221,7 @@ export function useGraphSimulation(): UseGraphSimulationResult {
     return () => {
       dragOwnerPositionsRef.current.clear();
       launchAnchorPositionsRef.current.clear();
-      activityAnchorPositionsRef.current.clear();
+      activityRectByNodeIdRef.current.clear();
       extraWorldBoundsRef.current = [];
       layoutSnapshotRef.current = null;
       lastValidSnapshotByTeamRef.current.clear();
@@ -236,8 +237,7 @@ export function useGraphSimulation(): UseGraphSimulationResult {
     resolveNearestOwnerSlot,
     getLaunchAnchorWorldPosition: (leadNodeId: string) =>
       launchAnchorPositionsRef.current.get(leadNodeId) ?? null,
-    getActivityAnchorWorldPosition: (nodeId: string) =>
+    getActivityWorldRect: (nodeId: string) => activityRectByNodeIdRef.current.get(nodeId) ?? null,
-      activityAnchorPositionsRef.current.get(nodeId) ?? null,
     getExtraWorldBounds: () => extraWorldBoundsRef.current,
   };
 }
@@ -294,7 +294,7 @@ function commitSnapshotGeometry(args: {
   lastValidSnapshotByTeamRef: { current: Map<string, StableSlotLayoutSnapshot> };
   dragOwnerPositionsRef: { current: ReadonlyMap<string, { x: number; y: number }> };
   launchAnchorPositionsRef: { current: Map<string, { x: number; y: number }> };
-  activityAnchorPositionsRef: { current: Map<string, { x: number; y: number }> };
+  activityRectByNodeIdRef: { current: Map<string, StableRect> };
   extraWorldBoundsRef: { current: WorldBounds[] };
   fillMissingFallbackPositions?: boolean;
 }): void {
@@ -306,7 +306,7 @@ function commitSnapshotGeometry(args: {
     lastValidSnapshotByTeamRef,
     dragOwnerPositionsRef,
     launchAnchorPositionsRef,
-    activityAnchorPositionsRef,
+    activityRectByNodeIdRef,
     extraWorldBoundsRef,
     fillMissingFallbackPositions = false,
   } = args;
@@ -319,7 +319,7 @@ function commitSnapshotGeometry(args: {
   }
 
   launchAnchorPositionsRef.current.clear();
-  activityAnchorPositionsRef.current.clear();
+  activityRectByNodeIdRef.current.clear();
   extraWorldBoundsRef.current = snapshotToWorldBounds(snapshot);
 
   if (snapshot.leadNodeId && snapshot.launchAnchor) {
@@ -327,36 +327,32 @@ function commitSnapshotGeometry(args: {
   }
 
   for (const frame of getTranslatedMemberFrames(snapshot, dragOwnerPositionsRef.current)) {
-    activityAnchorPositionsRef.current.set(frame.ownerId, {
+    activityRectByNodeIdRef.current.set(frame.ownerId, frame.activityColumnRect);
-      x: frame.activityRect.left,
-      y: frame.activityRect.top,
-    });
   }
 
-  activityAnchorPositionsRef.current.set(`lead:${teamName}`, {
+  if (snapshot.leadNodeId) {
-    x: snapshot.leadActivityRect.left,
+    activityRectByNodeIdRef.current.set(snapshot.leadNodeId, snapshot.leadActivityRect);
-    y: snapshot.leadActivityRect.top,
+  }
-  });
 }
 
 function resetToFallbackLayout(args: {
   nodes: GraphNode[];
   layoutSnapshotRef: { current: StableSlotLayoutSnapshot | null };
   launchAnchorPositionsRef: { current: Map<string, { x: number; y: number }> };
-  activityAnchorPositionsRef: { current: Map<string, { x: number; y: number }> };
+  activityRectByNodeIdRef: { current: Map<string, StableRect> };
   extraWorldBoundsRef: { current: WorldBounds[] };
 }): void {
   const {
     nodes,
     layoutSnapshotRef,
     launchAnchorPositionsRef,
-    activityAnchorPositionsRef,
+    activityRectByNodeIdRef,
     extraWorldBoundsRef,
   } = args;
 
   layoutSnapshotRef.current = null;
   launchAnchorPositionsRef.current.clear();
-  activityAnchorPositionsRef.current.clear();
+  activityRectByNodeIdRef.current.clear();
   extraWorldBoundsRef.current = [];
   fallbackPositionNodes(nodes);
   KanbanLayoutEngine.layout(nodes);

packages/agent-graph/src/layout/kanbanLayout.ts

@@ -11,7 +11,6 @@ import type { GraphNode } from '../ports/types';
 import { KANBAN_ZONE, TASK_PILL } from '../constants/canvas-constants';
 import { COLORS } from '../constants/colors';
 import { resolveActivityLaneSide } from './activityLane';
-import type { ActivityLaneWorldBounds } from './activityLane';
 import type { SlotFrame, StableRect } from './stableSlots';
 
 /** Column header info for rendering */
@@ -43,8 +42,6 @@ const COLUMN_LABELS: Record<string, { label: string; color: string }> = {
   approved: { label: 'Approved', color: COLORS.reviewApproved },
 };
 
-const ACTIVITY_KANBAN_CLEARANCE = 24;
-
 export function getOwnerKanbanBaseX(args: {
   ownerX: number;
   ownerKind: GraphNode['kind'];
@@ -91,7 +88,6 @@ export class KanbanLayoutEngine {
   static layout(
     nodes: GraphNode[],
     options?: {
-      activityLaneBounds?: readonly ActivityLaneWorldBounds[];
       memberSlotFrames?: readonly SlotFrame[];
       unassignedTaskRect?: StableRect | null;
     }
@@ -100,7 +96,6 @@ export class KanbanLayoutEngine {
     nodeMap.clear();
     for (const n of nodes) nodeMap.set(n.id, n);
     const leadX = nodes.find((node) => node.kind === 'lead')?.x ?? null;
-    const activityLaneBounds = options?.activityLaneBounds ?? [];
     const memberSlotFrameByOwnerId = new Map(
       (options?.memberSlotFrames ?? []).map((frame) => [frame.ownerId, frame] as const)
     );
@@ -148,7 +143,6 @@ export class KanbanLayoutEngine {
         owner,
         ownerId,
         leadX,
-        activityLaneBounds,
         memberSlotFrameByOwnerId.get(ownerId) ?? null
       );
       if (zoneInfo) this.zones.push(zoneInfo);
@@ -164,11 +158,9 @@ export class KanbanLayoutEngine {
     owner: GraphNode,
     ownerId: string,
     leadX: number | null,
-    activityLaneBounds: readonly ActivityLaneWorldBounds[],
     slotFrame: SlotFrame | null
   ): KanbanZoneInfo | null {
-    const { columnWidth, rowHeight, offsetY, columns } = KANBAN_ZONE;
+    const { columnWidth, rowHeight, offsetY, columns, headerHeight } = KANBAN_ZONE;
-    const headerHeight = 20; // space for column header label
     const ownerX = owner.x ?? 0;
     const ownerY = owner.y ?? 0;
 
@@ -193,8 +185,6 @@ export class KanbanLayoutEngine {
 
     if (activeColumns.length === 0) return null;
 
-    // Keep kanban columns on the open side of the owner, away from the reserved activity lane.
-    // This makes member lanes reserve real visual space instead of only affecting the force layout.
     let baseX = getOwnerKanbanBaseX({
       ownerX,
       ownerKind: owner.kind,
@@ -205,27 +195,10 @@ export class KanbanLayoutEngine {
     let baseY: number;
 
     if (slotFrame) {
-      baseX = slotFrame.taskBandRect.left + TASK_PILL.width / 2;
+      baseX = slotFrame.kanbanBandRect.left + TASK_PILL.width / 2;
-      baseY = slotFrame.taskBandRect.top;
+      baseY = slotFrame.kanbanBandRect.top;
     } else {
-      const taskZoneLeft = baseX - TASK_PILL.width / 2;
+      baseY = ownerY + offsetY;
-      const taskZoneRight =
-        baseX + (activeColumns.length - 1) * columnWidth + TASK_PILL.width / 2;
-      const overlappingActivityBottom = activityLaneBounds.reduce((maxBottom, bounds) => {
-        if (bounds.ownerId === ownerId) {
-          return Math.max(maxBottom, bounds.bottom);
-        }
-        if (!rangesOverlap(taskZoneLeft, taskZoneRight, bounds.left, bounds.right)) {
-          return maxBottom;
-        }
-        return Math.max(maxBottom, bounds.bottom);
-      }, -Infinity);
-      baseY = Math.max(
-        ownerY + offsetY,
-        overlappingActivityBottom > -Infinity
-          ? overlappingActivityBottom + ACTIVITY_KANBAN_CLEARANCE
-          : -Infinity
-      );
     }
 
     // Build headers + position tasks
@@ -376,7 +349,3 @@ export class KanbanLayoutEngine {
     }
   }
 }
-
-function rangesOverlap(aStart: number, aEnd: number, bStart: number, bEnd: number): boolean {
-  return aStart < bEnd && bStart < aEnd;
-}

packages/agent-graph/src/layout/stableSlots.ts

@@ -1,6 +1,6 @@
 import { KANBAN_ZONE, TASK_PILL } from '../constants/canvas-constants';
 import type { GraphLayoutPort, GraphNode, GraphOwnerSlotAssignment } from '../ports/types';
-import { ACTIVITY_ANCHOR_LAYOUT, ACTIVITY_LANE } from './activityLane';
+import { ACTIVITY_LANE } from './activityLane';
 import { LAUNCH_ANCHOR_LAYOUT, type WorldBounds } from './launchAnchor';
 import {
   STABLE_SLOT_GEOMETRY,
@@ -24,11 +24,13 @@ export interface OwnerFootprint {
   slotHeight: number;
   widthBucket: StableSlotWidthBucket;
   radialDepth: number;
-  activityWidth: number;
+  activityColumnWidth: number;
-  activityHeight: number;
+  activityColumnHeight: number;
-  processRailWidth: number;
+  processBandWidth: number;
-  taskBandWidth: number;
+  kanbanBandWidth: number;
-  taskBandHeight: number;
+  kanbanBandHeight: number;
+  boardBandWidth: number;
+  boardBandHeight: number;
   taskColumnCount: number;
   processCount: number;
 }
@@ -41,9 +43,10 @@ export interface SlotFrame {
   bounds: StableRect;
   ownerX: number;
   ownerY: number;
-  activityRect: StableRect;
+  boardBandRect: StableRect;
+  activityColumnRect: StableRect;
   processBandRect: StableRect;
-  taskBandRect: StableRect;
+  kanbanBandRect: StableRect;
   taskColumnCount: number;
 }
 
@@ -93,17 +96,24 @@ type RingLayoutStateMap = ReadonlyMap<string, RingLayoutState>;
 
 const SLOT_GEOMETRY = {
   ...STABLE_SLOT_GEOMETRY,
-  activityHeight: ACTIVITY_ANCHOR_LAYOUT.reservedHeight,
+  activityColumnHeight:
-  activityWidth: ACTIVITY_LANE.width,
-  activityToOwnerGap: STABLE_SLOT_GEOMETRY.slotVerticalGap,
-  ownerToProcessGap: STABLE_SLOT_GEOMETRY.slotVerticalGap,
-  processToTaskGap: STABLE_SLOT_GEOMETRY.slotVerticalGap,
-  taskBandHeight:
     ACTIVITY_LANE.headerHeight +
+    ACTIVITY_LANE.maxVisibleItems * ACTIVITY_LANE.rowHeight +
+    ACTIVITY_LANE.overflowHeight,
+  activityColumnWidth: ACTIVITY_LANE.width,
+  ownerToProcessGap: STABLE_SLOT_GEOMETRY.slotVerticalGap,
+  processToBoardGap: STABLE_SLOT_GEOMETRY.slotVerticalGap,
+  boardColumnGap: 24,
+  processRailMinWidth: STABLE_SLOT_GEOMETRY.processRailWidth,
+  kanbanBandHeight:
+    KANBAN_ZONE.headerHeight +
     STABLE_SLOT_GEOMETRY.taskMaxVisibleRows * KANBAN_ZONE.rowHeight,
   centralPadding: STABLE_SLOT_GEOMETRY.centralSafetyPadding,
 } as const;
 
+const PROCESS_RAIL_NODE_GAP = 42;
+const PROCESS_RAIL_NODE_FOOTPRINT = 28;
+
 const SECTOR_VECTORS = STABLE_SLOT_SECTOR_VECTORS;
 
 export function buildStableSlotLayoutSnapshot({
@@ -119,9 +129,9 @@ export function buildStableSlotLayoutSnapshot({
   const leadCoreRect = createCenteredRect(0, 0, 200, 168);
   const leadActivityRect = createRect(
     leadCoreRect.left - SLOT_GEOMETRY.centralBlockGap - ACTIVITY_LANE.width,
-    -ACTIVITY_ANCHOR_LAYOUT.reservedHeight / 2,
+    -SLOT_GEOMETRY.activityColumnHeight / 2,
     ACTIVITY_LANE.width,
-    ACTIVITY_ANCHOR_LAYOUT.reservedHeight
+    SLOT_GEOMETRY.activityColumnHeight
   );
   const launchHudRect = createRect(
     leadCoreRect.right + SLOT_GEOMETRY.centralBlockGap,
@@ -211,37 +221,42 @@ export function computeOwnerFootprints(
     }
 
     const taskColumnCount = taskColumnsByOwnerId.get(ownerId)?.size ?? 0;
-    const taskBandWidth =
+    const kanbanBandWidth =
       taskColumnCount <= 1
         ? TASK_PILL.width
         : TASK_PILL.width + (taskColumnCount - 1) * KANBAN_ZONE.columnWidth;
+    const processCount = processCountByOwnerId.get(ownerId) ?? 0;
+    const processBandWidth = computeProcessBandWidth(processCount);
+    const boardBandWidth =
+      SLOT_GEOMETRY.activityColumnWidth +
+      SLOT_GEOMETRY.boardColumnGap +
+      kanbanBandWidth;
+    const boardBandHeight = Math.max(
+      SLOT_GEOMETRY.activityColumnHeight,
+      SLOT_GEOMETRY.kanbanBandHeight
+    );
     const innerContentWidth = Math.max(
-      SLOT_GEOMETRY.activityWidth,
       SLOT_GEOMETRY.ownerMinWidth,
-      SLOT_GEOMETRY.processRailWidth,
+      processBandWidth,
-      taskBandWidth
+      boardBandWidth
     );
     const slotWidth = innerContentWidth + SLOT_GEOMETRY.memberSlotInnerPadding * 2;
     const slotHeight =
       SLOT_GEOMETRY.memberSlotInnerPadding * 2 +
-      SLOT_GEOMETRY.activityHeight +
-      SLOT_GEOMETRY.activityToOwnerGap +
       SLOT_GEOMETRY.ownerBandHeight +
       SLOT_GEOMETRY.ownerToProcessGap +
       SLOT_GEOMETRY.processBandHeight +
-      SLOT_GEOMETRY.processToTaskGap +
+      SLOT_GEOMETRY.processToBoardGap +
-      SLOT_GEOMETRY.taskBandHeight;
+      boardBandHeight;
     const radialDepth = Math.max(
       SLOT_GEOMETRY.memberSlotInnerPadding +
-        SLOT_GEOMETRY.activityHeight +
-        SLOT_GEOMETRY.activityToOwnerGap +
         SLOT_GEOMETRY.ownerBandHeight / 2,
       SLOT_GEOMETRY.memberSlotInnerPadding +
         SLOT_GEOMETRY.ownerBandHeight / 2 +
         SLOT_GEOMETRY.ownerToProcessGap +
         SLOT_GEOMETRY.processBandHeight +
-        SLOT_GEOMETRY.processToTaskGap +
+        SLOT_GEOMETRY.processToBoardGap +
-        SLOT_GEOMETRY.taskBandHeight
+        boardBandHeight
     );
 
     return [
@@ -251,13 +266,15 @@ export function computeOwnerFootprints(
         slotHeight,
         widthBucket: classifyWidthBucket(slotWidth),
         radialDepth,
-        activityWidth: SLOT_GEOMETRY.activityWidth,
+        activityColumnWidth: SLOT_GEOMETRY.activityColumnWidth,
-        activityHeight: SLOT_GEOMETRY.activityHeight,
+        activityColumnHeight: SLOT_GEOMETRY.activityColumnHeight,
-        processRailWidth: SLOT_GEOMETRY.processRailWidth,
+        processBandWidth,
-        taskBandWidth,
+        kanbanBandWidth,
-        taskBandHeight: SLOT_GEOMETRY.taskBandHeight,
+        kanbanBandHeight: SLOT_GEOMETRY.kanbanBandHeight,
+        boardBandWidth,
+        boardBandHeight,
         taskColumnCount,
-        processCount: processCountByOwnerId.get(ownerId) ?? 0,
+        processCount,
       } satisfies OwnerFootprint,
     ];
   });
@@ -273,6 +290,16 @@ export function classifyWidthBucket(width: number): StableSlotWidthBucket {
   return 'L';
 }
 
+export function computeProcessBandWidth(processCount: number): number {
+  if (processCount <= 1) {
+    return SLOT_GEOMETRY.processRailMinWidth;
+  }
+
+  const occupiedWidth =
+    (processCount - 1) * PROCESS_RAIL_NODE_GAP + PROCESS_RAIL_NODE_FOOTPRINT;
+  return Math.max(SLOT_GEOMETRY.processRailMinWidth, occupiedWidth);
+}
+
 export function resolveNearestSlotAssignment(args: {
   ownerId: string;
   ownerX: number;
@@ -461,14 +488,35 @@ function validateMemberSlotFrame(
   if (rectsOverlap(frame.bounds, snapshot.runtimeCentralExclusion)) {
     return { valid: false, reason: `slot frame for ${frame.ownerId} overlaps runtimeCentralExclusion` };
   }
-  if (!rectContainsRect(frame.bounds, frame.activityRect)) {
+  if (!rectContainsRect(frame.bounds, frame.boardBandRect)) {
-    return { valid: false, reason: `activityRect escapes slot bounds for ${frame.ownerId}` };
+    return { valid: false, reason: `boardBandRect escapes slot bounds for ${frame.ownerId}` };
+  }
+  if (!rectContainsRect(frame.bounds, frame.activityColumnRect)) {
+    return { valid: false, reason: `activityColumnRect escapes slot bounds for ${frame.ownerId}` };
   }
   if (!rectContainsRect(frame.bounds, frame.processBandRect)) {
     return { valid: false, reason: `processBandRect escapes slot bounds for ${frame.ownerId}` };
   }
-  if (!rectContainsRect(frame.bounds, frame.taskBandRect)) {
+  if (!rectContainsRect(frame.bounds, frame.kanbanBandRect)) {
-    return { valid: false, reason: `taskBandRect escapes slot bounds for ${frame.ownerId}` };
+    return { valid: false, reason: `kanbanBandRect escapes slot bounds for ${frame.ownerId}` };
+  }
+  if (!rectContainsRect(frame.boardBandRect, frame.activityColumnRect)) {
+    return {
+      valid: false,
+      reason: `activityColumnRect escapes boardBandRect for ${frame.ownerId}`,
+    };
+  }
+  if (!rectContainsRect(frame.boardBandRect, frame.kanbanBandRect)) {
+    return {
+      valid: false,
+      reason: `kanbanBandRect escapes boardBandRect for ${frame.ownerId}`,
+    };
+  }
+  if (rectsOverlap(frame.activityColumnRect, frame.kanbanBandRect)) {
+    return {
+      valid: false,
+      reason: `activityColumnRect overlaps kanbanBandRect for ${frame.ownerId}`,
+    };
   }
   if (!pointInRect(frame.ownerX, frame.ownerY, frame.bounds)) {
     return { valid: false, reason: `owner anchor escapes slot bounds for ${frame.ownerId}` };
@@ -502,9 +550,10 @@ export function translateSlotFrame(frame: SlotFrame, dx: number, dy: number): Sl
     bounds: translateRect(frame.bounds, dx, dy),
     ownerX: frame.ownerX + dx,
     ownerY: frame.ownerY + dy,
-    activityRect: translateRect(frame.activityRect, dx, dy),
+    boardBandRect: translateRect(frame.boardBandRect, dx, dy),
+    activityColumnRect: translateRect(frame.activityColumnRect, dx, dy),
     processBandRect: translateRect(frame.processBandRect, dx, dy),
-    taskBandRect: translateRect(frame.taskBandRect, dx, dy),
+    kanbanBandRect: translateRect(frame.kanbanBandRect, dx, dy),
   };
 }
 
@@ -554,7 +603,7 @@ function buildUnassignedTaskRect(
     columnCount <= 1
       ? TASK_PILL.width
       : TASK_PILL.width + (columnCount - 1) * KANBAN_ZONE.columnWidth;
-  const height = SLOT_GEOMETRY.taskBandHeight;
+  const height = SLOT_GEOMETRY.kanbanBandHeight;
   return createRect(
     -width / 2,
     leadCentralReservedBlock.bottom + SLOT_GEOMETRY.unassignedGap,
@@ -695,32 +744,36 @@ function buildSlotFrame(
   const ownerX = vector.x * radius;
   const ownerY = vector.y * radius;
   const slotTop =
-    ownerY -
+    ownerY - (SLOT_GEOMETRY.memberSlotInnerPadding + SLOT_GEOMETRY.ownerBandHeight / 2);
-    (SLOT_GEOMETRY.memberSlotInnerPadding +
+  const bounds = createRect(
-      SLOT_GEOMETRY.activityHeight +
+    ownerX - footprint.slotWidth / 2,
-      SLOT_GEOMETRY.activityToOwnerGap +
+    slotTop,
-      SLOT_GEOMETRY.ownerBandHeight / 2);
+    footprint.slotWidth,
-  const bounds = createRect(ownerX - footprint.slotWidth / 2, slotTop, footprint.slotWidth, footprint.slotHeight);
+    footprint.slotHeight
-  const activityRect = createRect(
-    bounds.left + (bounds.width - footprint.activityWidth) / 2,
-    bounds.top + SLOT_GEOMETRY.memberSlotInnerPadding,
-    footprint.activityWidth,
-    footprint.activityHeight
   );
   const processBandRect = createRect(
-    bounds.left + (bounds.width - footprint.processRailWidth) / 2,
+    bounds.left + (bounds.width - footprint.processBandWidth) / 2,
-    activityRect.bottom +
+    ownerY + SLOT_GEOMETRY.ownerBandHeight / 2 + SLOT_GEOMETRY.ownerToProcessGap,
-      SLOT_GEOMETRY.activityToOwnerGap +
+    footprint.processBandWidth,
-      SLOT_GEOMETRY.ownerBandHeight +
-      SLOT_GEOMETRY.ownerToProcessGap,
-    footprint.processRailWidth,
     SLOT_GEOMETRY.processBandHeight
   );
-  const taskBandRect = createRect(
+  const boardBandRect = createRect(
-    bounds.left + (bounds.width - footprint.taskBandWidth) / 2,
+    bounds.left + (bounds.width - footprint.boardBandWidth) / 2,
-    processBandRect.bottom + SLOT_GEOMETRY.processToTaskGap,
+    processBandRect.bottom + SLOT_GEOMETRY.processToBoardGap,
-    footprint.taskBandWidth,
+    footprint.boardBandWidth,
-    footprint.taskBandHeight
+    footprint.boardBandHeight
+  );
+  const activityColumnRect = createRect(
+    boardBandRect.left,
+    boardBandRect.top,
+    footprint.activityColumnWidth,
+    footprint.activityColumnHeight
+  );
+  const kanbanBandRect = createRect(
+    activityColumnRect.right + SLOT_GEOMETRY.boardColumnGap,
+    boardBandRect.top,
+    footprint.kanbanBandWidth,
+    footprint.kanbanBandHeight
   );
 
   return {
@@ -731,9 +784,10 @@ function buildSlotFrame(
     bounds,
     ownerX,
     ownerY,
-    activityRect,
+    boardBandRect,
+    activityColumnRect,
     processBandRect,
-    taskBandRect,
+    kanbanBandRect,
     taskColumnCount: footprint.taskColumnCount,
   };
 }
@@ -964,11 +1018,7 @@ function tryBuildValidSlotFrame(
   if (!frame) {
     return null;
   }
-  if (
+  if (!isSlotFramePlacementValid(frame, args.placedFrames, args.centralExclusion)) {
-    args.placedFrames.some((existing) =>
-      rectsOverlapWithGap(existing.bounds, frame.bounds, SLOT_GEOMETRY.ringPadding)
-    )
-  ) {
     return null;
   }
   args.usedSlotKeys.add(slotKey);
@@ -1079,11 +1129,7 @@ function computeSlotDirectionalDepths(
   footprint: OwnerFootprint,
   vector: { x: number; y: number }
 ): { outwardDepth: number; inwardDepth: number } {
-  const ownerLocalY =
+  const ownerLocalY = SLOT_GEOMETRY.memberSlotInnerPadding + SLOT_GEOMETRY.ownerBandHeight / 2;
-    SLOT_GEOMETRY.memberSlotInnerPadding +
-    SLOT_GEOMETRY.activityHeight +
-    SLOT_GEOMETRY.activityToOwnerGap +
-    SLOT_GEOMETRY.ownerBandHeight / 2;
   const topOffset = -ownerLocalY;
   const bottomOffset = footprint.slotHeight - ownerLocalY;
   const halfWidth = footprint.slotWidth / 2;

packages/agent-graph/src/ui/GraphView.tsx

@@ -16,6 +16,7 @@ import type { GraphDataPort } from '../ports/GraphDataPort';
 import type { GraphEventPort } from '../ports/GraphEventPort';
 import type { GraphConfigPort } from '../ports/GraphConfigPort';
 import type { GraphEdge, GraphNode, GraphOwnerSlotAssignment } from '../ports/types';
+import type { StableRect } from '../layout/stableSlots';
 import { GraphCanvas, type GraphCanvasHandle } from './GraphCanvas';
 import { GraphControls, type GraphFilterState } from './GraphControls';
 import { GraphOverlay } from './GraphOverlay';
@@ -31,7 +32,6 @@ import {
   getEdgeMidpoint,
 } from '../canvas/hit-detection';
 import { ANIM_SPEED } from '../constants/canvas-constants';
-import { getActivityAnchorScreenPlacement as buildActivityAnchorScreenPlacement } from '../layout/activityLane';
 import { getLaunchAnchorScreenPlacement as buildLaunchAnchorScreenPlacement } from '../layout/launchAnchor';
 
 export interface GraphViewProps {
@@ -70,19 +70,11 @@ export interface GraphViewProps {
     getLaunchAnchorScreenPlacement: (
       leadNodeId: string,
     ) => { x: number; y: number; scale: number; visible: boolean } | null;
-    getActivityAnchorScreenPlacement: (
+    getActivityWorldRect: (ownerNodeId: string) => StableRect | null;
-      ownerNodeId: string,
-    ) => { x: number; y: number; scale: number; visible: boolean } | null;
-    getActivityAnchorWorldPosition: (
-      ownerNodeId: string,
-    ) => { x: number; y: number } | null;
     getCameraZoom: () => number;
     worldToScreen: (x: number, y: number) => { x: number; y: number };
     getNodeWorldPosition: (nodeId: string) => { x: number; y: number } | null;
     getViewportSize: () => { width: number; height: number };
-    getNodeScreenPosition: (
-      nodeId: string,
-    ) => { x: number; y: number; visible: boolean } | null;
     focusNodeIds: ReadonlySet<string> | null;
   }) => React.ReactNode;
 }
@@ -240,49 +232,11 @@ export function GraphView({
       viewportHeight: viewport.height,
     });
   }, [getViewportSize]);
-  const getActivityAnchorScreenPlacement = useCallback((ownerNodeId: string) => {
-    const anchor = simulationRef.current.getActivityAnchorWorldPosition(ownerNodeId);
-    if (!anchor) {
-      return null;
-    }
-    const viewport = getViewportSize();
-    if (viewport.width <= 0 || viewport.height <= 0) {
-      return null;
-    }
-    const transform = cameraRef.current.transformRef.current;
-    return buildActivityAnchorScreenPlacement({
-      anchorX: anchor.x,
-      anchorY: anchor.y,
-      cameraX: transform.x,
-      cameraY: transform.y,
-      zoom: transform.zoom,
-      viewportWidth: viewport.width,
-      viewportHeight: viewport.height,
-    });
-  }, [getViewportSize]);
-  const getActivityAnchorWorldPosition = useCallback(
-    (ownerNodeId: string) => simulationRef.current.getActivityAnchorWorldPosition(ownerNodeId),
-    [],
-  );
   const getCameraZoom = useCallback(() => cameraRef.current.transformRef.current.zoom, []);
-  const getNodeScreenPosition = useCallback((nodeId: string) => {
+  const getActivityWorldRect = useCallback(
-    const viewport = getViewportSize();
+    (ownerNodeId: string) => simulationRef.current.getActivityWorldRect(ownerNodeId),
-    if (viewport.width <= 0 || viewport.height <= 0) {
+    []
-      return null;
+  );
-    }
-    const node = simulationRef.current.stateRef.current.nodes.find((candidate) => candidate.id === nodeId);
-    if (node?.x == null || node?.y == null) {
-      return null;
-    }
-    const transform = cameraRef.current.transformRef.current;
-    const x = node.x * transform.zoom + transform.x;
-    const y = node.y * transform.zoom + transform.y;
-    return {
-      x,
-      y,
-      visible: x > -80 && x < viewport.width + 80 && y > -80 && y < viewport.height + 80,
-    };
-  }, [getViewportSize]);
   const getNodeWorldPosition = useCallback((nodeId: string) => {
     const node = simulationRef.current.stateRef.current.nodes.find((candidate) => candidate.id === nodeId);
     if (node?.x == null || node?.y == null) {
@@ -800,13 +754,11 @@ export function GraphView({
         <div className="pointer-events-none absolute inset-0 z-[5] overflow-hidden">
           {renderHud({
             getLaunchAnchorScreenPlacement,
-            getActivityAnchorScreenPlacement,
+            getActivityWorldRect,
-            getActivityAnchorWorldPosition,
             getCameraZoom,
             worldToScreen: camera.worldToScreen,
             getNodeWorldPosition,
             getViewportSize,
-            getNodeScreenPosition,
             focusNodeIds: focusState.focusNodeIds,
           })}
         </div>

src/features/agent-graph/core/domain/buildInlineActivityEntries.ts

@@ -3,7 +3,7 @@ import { getIdleGraphLabel } from '@shared/utils/idleNotificationSemantics';
 import { isInboxNoiseMessage } from '@shared/utils/inboxNoise';
 import { isLeadMember } from '@shared/utils/leadDetection';
 
-import { buildGraphMemberNodeIdForMember } from './graphOwnerIdentity';
+import { buildGraphMemberNodeIdAliasMap } from './graphOwnerIdentity';
 
 import type { GraphActivityItem } from '@claude-teams/agent-graph';
 import type {
@@ -53,10 +53,9 @@ export function buildInlineActivityEntries({
   ownerNodeIds,
 }: BuildInlineActivityEntriesArgs): Map<string, InlineActivityEntry[]> {
   const entriesByOwnerNodeId = new Map<string, InlineActivityEntry[]>();
-  const memberNodeIdByName = new Map(
+  const memberNodeIdByAlias = buildGraphMemberNodeIdAliasMap(
-    data.members
+    teamName,
-      .filter((member) => !isLeadMember(member))
+    data.members.filter((member) => !isLeadMember(member))
-      .map((member) => [member.name, buildGraphMemberNodeIdForMember(teamName, member)] as const)
   );
 
   const appendEntry = (entry: InlineActivityEntry): void => {
@@ -95,7 +94,7 @@ export function buildInlineActivityEntries({
       leadId,
       leadName,
       ownerNodeIds,
-      memberNodeIdByName,
+      memberNodeIdByAlias,
     });
     if (!ownerNodeId) {
       continue;
@@ -140,7 +139,7 @@ export function buildInlineActivityEntries({
       leadId,
       leadName,
       ownerNodeIds,
-      memberNodeIdByName,
+      memberNodeIdByAlias,
     });
     if (!ownerNodeId) {
       continue;
@@ -220,16 +219,16 @@ function resolveMessageOwnerNodeId(args: {
   leadId: string;
   leadName: string;
   ownerNodeIds: ReadonlySet<string>;
-  memberNodeIdByName: ReadonlyMap<string, string>;
+  memberNodeIdByAlias: ReadonlyMap<string, string>;
 }): string | null {
-  const { message, leadId, leadName, ownerNodeIds, memberNodeIdByName } = args;
+  const { message, leadId, leadName, ownerNodeIds, memberNodeIdByAlias } = args;
   if (message.source === 'cross_team' || message.source === 'cross_team_sent') {
     return leadId;
   }
 
-  const fromId = resolveParticipantId(message.from ?? '', leadId, leadName, memberNodeIdByName);
+  const fromId = resolveParticipantId(message.from ?? '', leadId, leadName, memberNodeIdByAlias);
   const toId = message.to
-    ? resolveParticipantId(message.to, leadId, leadName, memberNodeIdByName)
+    ? resolveParticipantId(message.to, leadId, leadName, memberNodeIdByAlias)
     : leadId;
 
   if (toId !== leadId && ownerNodeIds.has(toId)) {
@@ -247,17 +246,17 @@ function resolveCommentOwnerNodeId(args: {
   leadId: string;
   leadName: string;
   ownerNodeIds: ReadonlySet<string>;
-  memberNodeIdByName: ReadonlyMap<string, string>;
+  memberNodeIdByAlias: ReadonlyMap<string, string>;
 }): string | null {
-  const { taskOwner, author, leadId, leadName, ownerNodeIds, memberNodeIdByName } = args;
+  const { taskOwner, author, leadId, leadName, ownerNodeIds, memberNodeIdByAlias } = args;
   if (taskOwner) {
-    const ownerId = resolveParticipantId(taskOwner, leadId, leadName, memberNodeIdByName);
+    const ownerId = resolveParticipantId(taskOwner, leadId, leadName, memberNodeIdByAlias);
     if (ownerNodeIds.has(ownerId)) {
       return ownerId;
     }
   }
 
-  const authorId = resolveParticipantId(author, leadId, leadName, memberNodeIdByName);
+  const authorId = resolveParticipantId(author, leadId, leadName, memberNodeIdByAlias);
   if (ownerNodeIds.has(authorId)) {
     return authorId;
   }
@@ -367,7 +366,7 @@ function resolveParticipantId(
   name: string,
   leadId: string,
   leadName: string | undefined,
-  memberNodeIdByName: ReadonlyMap<string, string>
+  memberNodeIdByAlias: ReadonlyMap<string, string>
 ): string {
   const normalized = name.trim().toLowerCase();
   if (normalized === 'user' || normalized === 'team-lead') {
@@ -376,7 +375,7 @@ function resolveParticipantId(
   if (normalized === leadName?.trim().toLowerCase()) {
     return leadId;
   }
-  return memberNodeIdByName.get(name) ?? leadId;
+  return memberNodeIdByAlias.get(name) ?? leadId;
 }
 
 function buildParticipantLabel(name: string | undefined, leadName: string): string {

src/features/agent-graph/core/domain/graphOwnerIdentity.ts

@@ -17,6 +17,31 @@ export function buildGraphMemberNodeIdForMember(
   return buildGraphMemberNodeId(teamName, getGraphStableOwnerId(member));
 }
 
+export function buildGraphMemberNodeIdAliasMap(
+  teamName: string,
+  members: readonly StableTeamOwnerLike[]
+): Map<string, string> {
+  const aliases = new Map<string, string>();
+
+  for (const member of members) {
+    const stableOwnerId = getGraphStableOwnerId(member).trim();
+    if (!stableOwnerId) {
+      continue;
+    }
+    aliases.set(stableOwnerId, buildGraphMemberNodeId(teamName, stableOwnerId));
+  }
+
+  for (const member of members) {
+    const memberName = member.name.trim();
+    if (!memberName || aliases.has(memberName)) {
+      continue;
+    }
+    aliases.set(memberName, buildGraphMemberNodeIdForMember(teamName, member));
+  }
+
+  return aliases;
+}
+
 export function parseGraphMemberNodeId(nodeId: string, teamName?: string): string | null {
   const prefix = teamName ? `member:${teamName}:` : 'member:';
   if (!nodeId.startsWith(prefix)) {

src/features/agent-graph/renderer/adapters/TeamGraphAdapter.ts

@@ -30,6 +30,7 @@ import {
 } from '../../core/domain/buildInlineActivityEntries';
 import { collapseOverflowStacksWithMeta } from '../../core/domain/collapseOverflowStacks';
 import {
+  buildGraphMemberNodeIdAliasMap,
   buildGraphMemberNodeIdForMember,
   getGraphStableOwnerId,
   GRAPH_STABLE_SLOT_LAYOUT_VERSION,
@@ -134,7 +135,7 @@ export class TeamGraphAdapter {
 
     const leadId = `lead:${teamName}`;
     const leadName = TeamGraphAdapter.#getLeadMemberName(teamData, teamName);
-    const memberNodeIdByName = TeamGraphAdapter.#buildMemberNodeIdByName(teamData, teamName);
+    const memberNodeIdByAlias = TeamGraphAdapter.#buildMemberNodeIdByAlias(teamData, teamName);
     const provisioningPresentation = buildTeamProvisioningPresentation({
       progress: provisioningProgress,
       members: teamData.members,
@@ -164,7 +165,7 @@ export class TeamGraphAdapter {
       leadId,
       teamData,
       teamName,
-      memberNodeIdByName,
+      memberNodeIdByAlias,
       spawnStatuses,
       pendingApprovalAgents,
       activeTools,
@@ -173,8 +174,8 @@ export class TeamGraphAdapter {
       isTeamProvisioning,
       isLaunchSettling
     );
-    this.#buildTaskNodes(nodes, edges, teamData, teamName, commentReadState, memberNodeIdByName);
+    this.#buildTaskNodes(nodes, edges, teamData, teamName, commentReadState, memberNodeIdByAlias);
-    this.#buildProcessNodes(nodes, edges, teamData, teamName, memberNodeIdByName);
+    this.#buildProcessNodes(nodes, edges, teamData, teamName, memberNodeIdByAlias);
     this.#attachActivityFeeds(nodes, teamData, teamName, leadId, leadName);
     this.#buildMessageParticles(
       particles,
@@ -184,7 +185,7 @@ export class TeamGraphAdapter {
       leadId,
       leadName,
       edges,
-      memberNodeIdByName
+      memberNodeIdByAlias
     );
     this.#buildCommentParticles(
       particles,
@@ -193,7 +194,7 @@ export class TeamGraphAdapter {
       leadId,
       leadName,
       edges,
-      memberNodeIdByName
+      memberNodeIdByAlias
     );
 
     return {
@@ -226,11 +227,10 @@ export class TeamGraphAdapter {
     return getGraphLeadMemberName(data, teamName);
   }
 
-  static #buildMemberNodeIdByName(data: TeamData, teamName: string): Map<string, string> {
+  static #buildMemberNodeIdByAlias(data: TeamData, teamName: string): Map<string, string> {
-    return new Map(
+    return buildGraphMemberNodeIdAliasMap(
-      data.members
+      teamName,
-        .filter((member) => !isLeadMember(member))
+      data.members.filter((member) => !isLeadMember(member))
-        .map((member) => [member.name, buildGraphMemberNodeIdForMember(teamName, member)] as const)
     );
   }
 
@@ -464,7 +464,7 @@ export class TeamGraphAdapter {
     leadId: string,
     data: TeamData,
     teamName: string,
-    memberNodeIdByName: ReadonlyMap<string, string>,
+    memberNodeIdByAlias: ReadonlyMap<string, string>,
     spawnStatuses?: Record<string, MemberSpawnStatusEntry>,
     pendingApprovalAgents?: Set<string>,
     activeTools?: Record<string, Record<string, ActiveToolCall>>,
@@ -478,7 +478,7 @@ export class TeamGraphAdapter {
       if (isLeadMember(member)) continue;
 
       const memberId =
-        memberNodeIdByName.get(member.name) ?? buildGraphMemberNodeIdForMember(teamName, member);
+        memberNodeIdByAlias.get(member.name) ?? buildGraphMemberNodeIdForMember(teamName, member);
       const spawn = spawnStatuses?.[member.name];
       const activeTool = TeamGraphAdapter.#selectVisibleTool(
         activeTools?.[member.name],
@@ -568,7 +568,7 @@ export class TeamGraphAdapter {
     data: TeamData,
     teamName: string,
     commentReadState?: Record<string, unknown>,
-    memberNodeIdByName?: ReadonlyMap<string, string>
+    memberNodeIdByAlias?: ReadonlyMap<string, string>
   ): void {
     const taskStateById = new Map<string, Pick<TeamData['tasks'][number], 'status'>>();
     const taskDisplayIds = new Map<string, string>();
@@ -589,7 +589,7 @@ export class TeamGraphAdapter {
     for (const task of data.tasks) {
       if (task.status === 'deleted') continue;
       const taskId = `task:${teamName}:${task.id}`;
-      const ownerMemberId = task.owner ? (memberNodeIdByName?.get(task.owner) ?? null) : null;
+      const ownerMemberId = task.owner ? (memberNodeIdByAlias?.get(task.owner) ?? null) : null;
       const kanbanTaskState = data.kanbanState.tasks[task.id];
       const reviewerName = resolveTaskReviewer(task, kanbanTaskState);
       const isReviewCycle = isTaskInReviewCycle(task);
@@ -752,11 +752,11 @@ export class TeamGraphAdapter {
     edges: GraphEdge[],
     data: TeamData,
     teamName: string,
-    memberNodeIdByName?: ReadonlyMap<string, string>
+    memberNodeIdByAlias?: ReadonlyMap<string, string>
   ): void {
     for (const { process: proc, ownerId } of TeamGraphAdapter.#selectRelevantProcesses(
       data.processes,
-      memberNodeIdByName
+      memberNodeIdByAlias
     )) {
       const procId = `process:${teamName}:${proc.id}`;
 
@@ -786,13 +786,13 @@ export class TeamGraphAdapter {
 
   static #selectRelevantProcesses(
     processes: readonly TeamProcess[],
-    memberNodeIdByName?: ReadonlyMap<string, string>
+    memberNodeIdByAlias?: ReadonlyMap<string, string>
   ): { process: TeamProcess; ownerId: string }[] {
     const selectedByOwnerId = new Map<string, TeamProcess>();
 
     for (const process of processes) {
       const ownerId = process.registeredBy
-        ? (memberNodeIdByName?.get(process.registeredBy) ?? null)
+        ? (memberNodeIdByAlias?.get(process.registeredBy) ?? null)
         : null;
       if (!ownerId) {
         continue;
@@ -872,7 +872,7 @@ export class TeamGraphAdapter {
     leadId: string,
     leadName: string,
     edges: GraphEdge[],
-    memberNodeIdByName: ReadonlyMap<string, string>
+    memberNodeIdByAlias: ReadonlyMap<string, string>
   ): void {
     const ordered = [...messages].reverse();
 
@@ -960,7 +960,7 @@ export class TeamGraphAdapter {
         leadId,
         leadName,
         edges,
-        memberNodeIdByName
+        memberNodeIdByAlias
       );
       if (!edgeId) continue;
 
@@ -970,7 +970,7 @@ export class TeamGraphAdapter {
         msg.from ?? '',
         leadId,
         leadName,
-        memberNodeIdByName
+        memberNodeIdByAlias
       );
       const isFromTeammate = fromId !== leadId;
 
@@ -1011,7 +1011,7 @@ export class TeamGraphAdapter {
     leadId: string,
     leadName: string,
     edges: GraphEdge[],
-    memberNodeIdByName: ReadonlyMap<string, string>
+    memberNodeIdByAlias: ReadonlyMap<string, string>
   ): void {
     // First call: record current comment counts without creating particles.
     // This prevents pre-existing comments from spawning particles when the graph opens.
@@ -1052,7 +1052,7 @@ export class TeamGraphAdapter {
             newComment.author,
             leadId,
             leadName,
-            memberNodeIdByName
+            memberNodeIdByAlias
           );
           const taskNodeId = `task:${teamName}:${task.id}`;
           const authorEdge =
@@ -1187,7 +1187,7 @@ export class TeamGraphAdapter {
     leadId: string,
     leadName: string,
     edges: GraphEdge[],
-    memberNodeIdByName: ReadonlyMap<string, string>
+    memberNodeIdByAlias: ReadonlyMap<string, string>
   ): string | null {
     const { from, to } = msg;
 
@@ -1196,9 +1196,14 @@ export class TeamGraphAdapter {
         from,
         leadId,
         leadName,
-        memberNodeIdByName
+        memberNodeIdByAlias
+      );
+      const toId = TeamGraphAdapter.#resolveParticipantId(
+        to,
+        leadId,
+        leadName,
+        memberNodeIdByAlias
       );
-      const toId = TeamGraphAdapter.#resolveParticipantId(to, leadId, leadName, memberNodeIdByName);
       return (
         edges.find((e) => e.source === fromId && e.target === toId)?.id ??
         edges.find((e) => e.source === toId && e.target === fromId)?.id ??
@@ -1211,7 +1216,7 @@ export class TeamGraphAdapter {
         from,
         leadId,
         leadName,
-        memberNodeIdByName
+        memberNodeIdByAlias
       );
       return (
         edges.find(
@@ -1229,12 +1234,12 @@ export class TeamGraphAdapter {
     name: string,
     leadId: string,
     leadName: string | undefined,
-    memberNodeIdByName: ReadonlyMap<string, string>
+    memberNodeIdByAlias: ReadonlyMap<string, string>
   ): string {
     const normalized = name.trim().toLowerCase();
     if (normalized === 'user' || normalized === 'team-lead') return leadId;
     if (normalized === leadName?.trim().toLowerCase()) return leadId;
-    return memberNodeIdByName.get(name) ?? leadId;
+    return memberNodeIdByAlias.get(name) ?? leadId;
   }
 
   /** Extract external team name from cross-team "from" field like "team-b.alice" */

src/features/agent-graph/renderer/ui/GraphActivityHud.tsx

@@ -1,6 +1,6 @@
 import { useCallback, useEffect, useLayoutEffect, useMemo, useRef, useState } from 'react';
 
-import { ACTIVITY_ANCHOR_LAYOUT, ACTIVITY_LANE } from '@claude-teams/agent-graph';
+import { ACTIVITY_LANE } from '@claude-teams/agent-graph';
 import { ActivityItem } from '@renderer/components/team/activity/ActivityItem';
 import {
   buildMessageContext,
@@ -26,18 +26,26 @@ import type {
 } from '@renderer/components/team/members/memberDetailTypes';
 import type { ResolvedTeamMember } from '@shared/types/team';
 
+const ACTIVITY_SHELL_HEIGHT =
+  ACTIVITY_LANE.headerHeight +
+  ACTIVITY_LANE.maxVisibleItems * ACTIVITY_LANE.rowHeight +
+  ACTIVITY_LANE.overflowHeight;
+
 interface GraphActivityHudProps {
   teamName: string;
   nodes: GraphNode[];
-  getActivityAnchorScreenPlacement: (
+  getActivityWorldRect?: (ownerNodeId: string) => {
-    ownerNodeId: string
+    left: number;
-  ) => { x: number; y: number; scale: number; visible: boolean } | null;
+    top: number;
-  getActivityAnchorWorldPosition?: (ownerNodeId: string) => { x: number; y: number } | null;
+    right: number;
+    bottom: number;
+    width: number;
+    height: number;
+  } | null;
   getCameraZoom?: () => number;
   worldToScreen?: (x: number, y: number) => { x: number; y: number };
   getNodeWorldPosition?: (nodeId: string) => { x: number; y: number } | null;
   getViewportSize?: () => { width: number; height: number };
-  getNodeScreenPosition?: (nodeId: string) => { x: number; y: number; visible: boolean } | null;
   focusNodeIds: ReadonlySet<string> | null;
   enabled?: boolean;
   onOpenTaskDetail?: (taskId: string) => void;
@@ -53,13 +61,11 @@ interface GraphActivityHudProps {
 export const GraphActivityHud = ({
   teamName,
   nodes,
-  getActivityAnchorScreenPlacement,
+  getActivityWorldRect = () => null,
-  getActivityAnchorWorldPosition = () => null,
   getCameraZoom = () => 1,
   worldToScreen,
   getNodeWorldPosition = () => null,
   getViewportSize,
-  getNodeScreenPosition = () => null,
   focusNodeIds,
   enabled = true,
   onOpenTaskDetail,
@@ -125,7 +131,9 @@ export const GraphActivityHud = ({
           overflowCount,
         };
       })
-      .filter((lane) => lane.entries.length > 0 || lane.overflowCount > 0);
+      .filter(
+        (lane) => lane.node.kind === 'member' || lane.entries.length > 0 || lane.overflowCount > 0
+      );
   }, [entryMapByOwnerNodeId, ownerNodes]);
 
   useLayoutEffect(() => {
@@ -157,7 +165,7 @@ export const GraphActivityHud = ({
         shell: HTMLDivElement;
         connector: SVGSVGElement | null;
         connectorPath: SVGPathElement | null;
-        laneTopLeft: { x: number; y: number };
+        laneRect: NonNullable<ReturnType<typeof getActivityWorldRect>>;
         nodeWorld: { x: number; y: number };
       }[] = [];
 
@@ -169,10 +177,9 @@ export const GraphActivityHud = ({
         const connector = connectorRefs.current.get(lane.node.id) ?? null;
         const connectorPath = connectorPathRefs.current.get(lane.node.id) ?? null;
 
-        const placement = getActivityAnchorScreenPlacement(lane.node.id);
+        const laneRect = getActivityWorldRect(lane.node.id);
-        const laneTopLeft = getActivityAnchorWorldPosition(lane.node.id);
         const nodeWorld = getNodeWorldPosition(lane.node.id);
-        if (!placement || !laneTopLeft || !nodeWorld) {
+        if (!laneRect || !nodeWorld || !worldToScreen) {
           shell.style.opacity = '0';
           if (connector) {
             connector.style.opacity = '0';
@@ -180,19 +187,18 @@ export const GraphActivityHud = ({
           continue;
         }
 
-        const scale = Math.max(getCameraZoom(), 0.001);
+        const zoom = Math.max(getCameraZoom(), 0.001);
-        const widthScreen = Math.max(1, (shell.offsetWidth || ACTIVITY_LANE.width) * scale);
+        const screenTopLeft = worldToScreen(laneRect.left, laneRect.top);
-        const heightScreen = Math.max(1, (shell.offsetHeight || 220) * scale);
+        const widthScreen = Math.max(1, laneRect.width * zoom);
+        const heightScreen = Math.max(1, laneRect.height * zoom);
         const viewport = getViewportSize?.();
-        const laneVisible = viewport
+        const laneVisible =
-          ? placement.x + widthScreen > -80 &&
+          !viewport ||
-            placement.x < viewport.width + 80 &&
+          (screenTopLeft.x + widthScreen > -80 &&
-            placement.y + heightScreen > -80 &&
+            screenTopLeft.x < viewport.width + 80 &&
-            placement.y < viewport.height + 80
+            screenTopLeft.y + heightScreen > -80 &&
-          : placement.visible;
+            screenTopLeft.y < viewport.height + 80);
-
+        if (!laneVisible) {
-        const nodeScreen = getNodeScreenPosition(lane.node.id);
-        if (!nodeScreen?.visible || !laneVisible) {
           shell.style.opacity = '0';
           if (connector) {
             connector.style.opacity = '0';
@@ -205,31 +211,23 @@ export const GraphActivityHud = ({
           shell,
           connector,
           connectorPath,
-          laneTopLeft,
+          laneRect,
           nodeWorld,
         });
       }
 
       for (const entry of measurableLanes) {
-        const { lane, shell, connector, connectorPath, laneTopLeft, nodeWorld } = entry;
+        const { lane, shell, connector, connectorPath, laneRect, nodeWorld } = entry;
         const baseOpacity = focusNodeIds && !focusNodeIds.has(lane.node.id) ? 0.25 : 1;
-        const widthWorld = shell.offsetWidth || ACTIVITY_LANE.width;
-        const heightWorld = shell.offsetHeight || 220;
-        const ownerBottomLimit =
-          nodeWorld.y +
-          (lane.node.kind === 'lead'
-            ? ACTIVITY_ANCHOR_LAYOUT.leadOffsetY + ACTIVITY_ANCHOR_LAYOUT.reservedHeight
-            : ACTIVITY_ANCHOR_LAYOUT.memberOffsetY + ACTIVITY_ANCHOR_LAYOUT.reservedHeight);
-        const adjustedLaneTop = Math.min(laneTopLeft.y, ownerBottomLimit - heightWorld);
 
         shell.style.opacity = String(baseOpacity);
-        shell.style.left = `${Math.round(laneTopLeft.x)}px`;
+        shell.style.left = `${Math.round(laneRect.left)}px`;
-        shell.style.top = `${Math.round(adjustedLaneTop)}px`;
+        shell.style.top = `${Math.round(laneRect.top)}px`;
         shell.style.transform = '';
 
         if (connector && connectorPath) {
-          const endX = laneTopLeft.x + widthWorld / 2;
+          const endX = laneRect.left + laneRect.width / 2;
-          const endY = adjustedLaneTop + heightWorld - 6;
+          const endY = laneRect.top >= nodeWorld.y ? laneRect.top + 10 : laneRect.bottom - 10;
           const startX = nodeWorld.x;
           const startY = nodeWorld.y - 18;
           const minX = Math.min(startX, endX);
@@ -273,11 +271,9 @@ export const GraphActivityHud = ({
   }, [
     enabled,
     focusNodeIds,
-    getActivityAnchorScreenPlacement,
+    getActivityWorldRect,
-    getActivityAnchorWorldPosition,
     getCameraZoom,
     getNodeWorldPosition,
-    getNodeScreenPosition,
     getViewportSize,
     worldToScreen,
     visibleLanes,
@@ -341,7 +337,9 @@ export const GraphActivityHud = ({
     if (!(canvas instanceof HTMLCanvasElement)) {
       return;
     }
-    event.preventDefault();
+    if (event.cancelable) {
+      event.preventDefault();
+    }
     canvas.dispatchEvent(
       new WheelEvent('wheel', {
         deltaX: event.deltaX,
@@ -395,91 +393,118 @@ export const GraphActivityHud = ({
       >
         {visibleLanes.map((lane) => (
           <div key={lane.node.id}>
-            <svg
+            {(() => {
-              ref={(element) => {
+              const laneRect = getActivityWorldRect(lane.node.id);
-                connectorRefs.current.set(lane.node.id, element);
+              const laneWidth = laneRect?.width ?? ACTIVITY_LANE.width;
-              }}
+              const laneHeight = laneRect?.height ?? ACTIVITY_SHELL_HEIGHT;
-              className="pointer-events-none absolute z-[9] overflow-visible opacity-0"
-            >
-              <path
-                ref={(element) => {
-                  connectorPathRefs.current.set(lane.node.id, element);
-                }}
-                d=""
-                fill="none"
-                stroke="rgba(148, 163, 184, 0.3)"
-                strokeWidth="1.25"
-                strokeLinecap="round"
-                strokeDasharray="3 4"
-              />
-            </svg>
-            <div
-              ref={(element) => {
-                shellRefs.current.set(lane.node.id, element);
-              }}
-              className="pointer-events-auto absolute z-10 origin-top-left opacity-0"
-              style={{ width: `${ACTIVITY_LANE.width}px`, maxWidth: `${ACTIVITY_LANE.width}px` }}
-            >
-              <div className="mb-1 px-1 text-[10px] font-semibold tracking-[0.2em] text-slate-400/70">
-                Activity
-              </div>
-              <div className="min-w-0 max-w-full space-y-2 overflow-hidden">
-                {lane.entries.map((entry, index) => {
-                  const messageKey = toMessageKey(entry.message);
-                  const renderProps = resolveMessageRenderProps(entry.message, messageContext);
-                  const timelineItem: TimelineItem = { type: 'message', message: entry.message };
-                  const isUnread = !entry.message.read && !readSet.has(messageKey);
 
-                  return (
+              return (
-                    <div
+                <>
-                      key={entry.graphItem.id}
+                  <svg
-                      className="min-w-0 max-w-full cursor-pointer overflow-hidden"
+                    ref={(element) => {
-                      role="button"
+                      connectorRefs.current.set(lane.node.id, element);
-                      tabIndex={0}
+                    }}
-                      onClick={() => handleMessageClick(timelineItem)}
+                    className="pointer-events-none absolute z-[9] overflow-visible opacity-0"
-                      onKeyDown={(event) => {
-                        if (event.key === 'Enter' || event.key === ' ') {
-                          event.preventDefault();
-                          handleMessageClick(timelineItem);
-                        }
-                      }}
-                    >
-                      <ActivityItem
-                        message={entry.message}
-                        teamName={teamName}
-                        compactHeader
-                        collapseMode="managed"
-                        isCollapsed
-                        canToggleCollapse={false}
-                        isUnread={isUnread}
-                        expandItemKey={messageKey}
-                        onExpand={handleExpandItem}
-                        memberRole={renderProps.memberRole}
-                        memberColor={renderProps.memberColor}
-                        recipientColor={renderProps.recipientColor}
-                        memberColorMap={messageContext.colorMap}
-                        localMemberNames={messageContext.localMemberNames}
-                        onMemberNameClick={handleMemberNameClick}
-                        onTaskIdClick={onOpenTaskDetail}
-                        zebraShade={index % 2 === 1}
-                        teamNames={teamNames}
-                        teamColorByName={teamColorByName}
-                      />
-                    </div>
-                  );
-                })}
-
-                {lane.overflowCount > 0 ? (
-                  <button
-                    type="button"
-                    className="w-full rounded-md border border-white/10 bg-[rgba(8,14,28,0.64)] px-3 py-1 text-center text-[11px] font-medium text-slate-300 transition-colors hover:border-white/20 hover:bg-[rgba(12,20,40,0.78)]"
-                    onClick={() => handleOpenOwnerActivity(lane.node)}
                   >
-                    +{lane.overflowCount} more
+                    <path
-                  </button>
+                      ref={(element) => {
-                ) : null}
+                        connectorPathRefs.current.set(lane.node.id, element);
-              </div>
+                      }}
-            </div>
+                      d=""
+                      fill="none"
+                      stroke="rgba(148, 163, 184, 0.3)"
+                      strokeWidth="1.25"
+                      strokeLinecap="round"
+                      strokeDasharray="3 4"
+                    />
+                  </svg>
+                  <div
+                    ref={(element) => {
+                      shellRefs.current.set(lane.node.id, element);
+                    }}
+                    className="pointer-events-auto absolute z-10 origin-top-left opacity-0"
+                    style={{
+                      width: `${laneWidth}px`,
+                      maxWidth: `${laneWidth}px`,
+                      height: `${laneHeight}px`,
+                    }}
+                  >
+                    <div className="flex h-full min-w-0 max-w-full flex-col overflow-hidden">
+                      <div className="mb-1 px-1 text-[10px] font-semibold tracking-[0.2em] text-slate-400/70">
+                        Activity
+                      </div>
+                      <div className="flex min-h-0 flex-1 flex-col gap-2 overflow-hidden">
+                        {lane.entries.length === 0 && lane.overflowCount === 0 ? (
+                          <div className="flex h-[72px] min-h-[72px] items-center rounded-md border border-dashed border-white/10 bg-[rgba(8,14,28,0.28)] px-3 text-[11px] text-slate-400/60">
+                            No recent activity
+                          </div>
+                        ) : null}
+                        {lane.entries.map((entry, index) => {
+                          const messageKey = toMessageKey(entry.message);
+                          const renderProps = resolveMessageRenderProps(
+                            entry.message,
+                            messageContext
+                          );
+                          const timelineItem: TimelineItem = {
+                            type: 'message',
+                            message: entry.message,
+                          };
+                          const isUnread = !entry.message.read && !readSet.has(messageKey);
+
+                          return (
+                            <div
+                              key={entry.graphItem.id}
+                              className="h-[72px] min-h-[72px] min-w-0 max-w-full cursor-pointer overflow-hidden"
+                              role="button"
+                              tabIndex={0}
+                              onClick={() => handleMessageClick(timelineItem)}
+                              onKeyDown={(event) => {
+                                if (event.key === 'Enter' || event.key === ' ') {
+                                  event.preventDefault();
+                                  handleMessageClick(timelineItem);
+                                }
+                              }}
+                            >
+                              <ActivityItem
+                                message={entry.message}
+                                teamName={teamName}
+                                compactHeader
+                                collapseMode="managed"
+                                isCollapsed
+                                canToggleCollapse={false}
+                                isUnread={isUnread}
+                                expandItemKey={messageKey}
+                                onExpand={handleExpandItem}
+                                memberRole={renderProps.memberRole}
+                                memberColor={renderProps.memberColor}
+                                recipientColor={renderProps.recipientColor}
+                                memberColorMap={messageContext.colorMap}
+                                localMemberNames={messageContext.localMemberNames}
+                                onMemberNameClick={handleMemberNameClick}
+                                onTaskIdClick={onOpenTaskDetail}
+                                zebraShade={index % 2 === 1}
+                                teamNames={teamNames}
+                                teamColorByName={teamColorByName}
+                              />
+                            </div>
+                          );
+                        })}
+
+                        {lane.overflowCount > 0 ? (
+                          <button
+                            type="button"
+                            className="h-8 min-h-8 w-full rounded-md border border-white/10 bg-[rgba(8,14,28,0.64)] px-3 py-1 text-center text-[11px] font-medium text-slate-300 transition-colors hover:border-white/20 hover:bg-[rgba(12,20,40,0.78)]"
+                            onClick={() => handleOpenOwnerActivity(lane.node)}
+                          >
+                            +{lane.overflowCount} more
+                          </button>
+                        ) : null}
+                      </div>
+                    </div>
+                  </div>
+                </>
+              );
+            })()}
           </div>
         ))}
       </div>

src/features/agent-graph/renderer/ui/TeamGraphOverlay.tsx

@@ -131,33 +131,30 @@ export const TeamGraphOverlay = ({
         renderHud={(hudProps) => {
           const extraHudProps = hudProps as typeof hudProps & {
             getViewportSize?: () => { width: number; height: number };
-            getActivityAnchorWorldPosition?: (
+            getActivityWorldRect?: (ownerNodeId: string) => {
-              ownerNodeId: string
+              left: number;
-            ) => { x: number; y: number } | null;
+              top: number;
+              right: number;
+              bottom: number;
+              width: number;
+              height: number;
+            } | null;
             getCameraZoom?: () => number;
             worldToScreen?: (x: number, y: number) => { x: number; y: number };
             getNodeWorldPosition?: (nodeId: string) => { x: number; y: number } | null;
           };
-          const {
+          const { getLaunchAnchorScreenPlacement, getViewportSize, focusNodeIds } = extraHudProps;
-            getLaunchAnchorScreenPlacement,
-            getActivityAnchorScreenPlacement,
-            getViewportSize,
-            getNodeScreenPosition,
-            focusNodeIds,
-          } = extraHudProps;
 
           return (
             <>
               <GraphActivityHud
                 teamName={teamName}
                 nodes={graphData.nodes}
-                getActivityAnchorScreenPlacement={getActivityAnchorScreenPlacement}
+                getActivityWorldRect={extraHudProps.getActivityWorldRect}
-                getActivityAnchorWorldPosition={extraHudProps.getActivityAnchorWorldPosition}
                 getCameraZoom={extraHudProps.getCameraZoom}
                 worldToScreen={extraHudProps.worldToScreen}
                 getNodeWorldPosition={extraHudProps.getNodeWorldPosition}
                 getViewportSize={getViewportSize}
-                getNodeScreenPosition={getNodeScreenPosition}
                 focusNodeIds={focusNodeIds}
                 onOpenTaskDetail={onOpenTaskDetail}
                 onOpenMemberProfile={onOpenMemberProfile}

src/features/agent-graph/renderer/ui/TeamGraphTab.tsx

@@ -153,33 +153,30 @@ export const TeamGraphTab = ({
           renderHud={(hudProps) => {
             const extraHudProps = hudProps as typeof hudProps & {
               getViewportSize?: () => { width: number; height: number };
-              getActivityAnchorWorldPosition?: (
+              getActivityWorldRect?: (ownerNodeId: string) => {
-                ownerNodeId: string
+                left: number;
-              ) => { x: number; y: number } | null;
+                top: number;
+                right: number;
+                bottom: number;
+                width: number;
+                height: number;
+              } | null;
               getCameraZoom?: () => number;
               worldToScreen?: (x: number, y: number) => { x: number; y: number };
               getNodeWorldPosition?: (nodeId: string) => { x: number; y: number } | null;
             };
-            const {
+            const { getLaunchAnchorScreenPlacement, getViewportSize, focusNodeIds } = extraHudProps;
-              getLaunchAnchorScreenPlacement,
-              getActivityAnchorScreenPlacement,
-              getViewportSize,
-              getNodeScreenPosition,
-              focusNodeIds,
-            } = extraHudProps;
 
             return (
               <>
                 <GraphActivityHud
                   teamName={teamName}
                   nodes={graphData.nodes}
-                  getActivityAnchorScreenPlacement={getActivityAnchorScreenPlacement}
+                  getActivityWorldRect={extraHudProps.getActivityWorldRect}
-                  getActivityAnchorWorldPosition={extraHudProps.getActivityAnchorWorldPosition}
                   getCameraZoom={extraHudProps.getCameraZoom}
                   worldToScreen={extraHudProps.worldToScreen}
                   getNodeWorldPosition={extraHudProps.getNodeWorldPosition}
                   getViewportSize={getViewportSize}
-                  getNodeScreenPosition={getNodeScreenPosition}
                   focusNodeIds={focusNodeIds}
                   enabled={isActive}
                   onOpenTaskDetail={dispatchOpenTask}

test/renderer/features/agent-graph/GraphActivityHud.test.ts

@@ -2,7 +2,6 @@ import React, { act } from 'react';
 import { createRoot } from 'react-dom/client';
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
 
-import { ACTIVITY_ANCHOR_LAYOUT } from '@claude-teams/agent-graph';
 import { GraphActivityHud } from '@features/agent-graph/renderer/ui/GraphActivityHud';
 
 import type { GraphNode } from '@claude-teams/agent-graph';
@@ -227,7 +226,18 @@ describe('GraphActivityHud', () => {
         React.createElement(GraphActivityHud, {
           teamName: 'demo-team',
           nodes: [node],
-          getActivityAnchorScreenPlacement: () => ({ x: 40, y: 80, scale: 1, visible: true }),
+          getActivityWorldRect: () => ({
+            left: 40,
+            top: 80,
+            right: 336,
+            bottom: 372,
+            width: 296,
+            height: 292,
+          }),
+          getCameraZoom: () => 1,
+          worldToScreen: (x: number, y: number) => ({ x, y }),
+          getNodeWorldPosition: () => ({ x: 120, y: 40 }),
+          getViewportSize: () => ({ width: 1200, height: 800 }),
           focusNodeIds: null,
           onOpenMemberProfile,
         })
@@ -256,7 +266,7 @@ describe('GraphActivityHud', () => {
     });
   });
 
-  it('keeps the activity lane above the owner label area when packed anchor drifts too low', async () => {
+  it('pins the activity lane to the provided world rect without post-hoc repositioning', async () => {
     const message: InboxMessage = {
       from: 'team-lead',
       to: 'jack',
@@ -307,17 +317,23 @@ describe('GraphActivityHud', () => {
     document.body.appendChild(host);
     const root = createRoot(host);
     const nodeWorld = { x: 320, y: 300 };
-    const packedAnchor = { x: 120, y: 260 };
+    const laneRect = {
+      left: 120,
+      top: 340,
+      right: 416,
+      bottom: 632,
+      width: 296,
+      height: 292,
+    };
 
     await act(async () => {
       root.render(
         React.createElement(GraphActivityHud, {
           teamName: 'demo-team',
           nodes: [node],
-          getActivityAnchorScreenPlacement: () => ({ x: 40, y: 80, scale: 1, visible: true }),
+          getActivityWorldRect: () => laneRect,
-          getActivityAnchorWorldPosition: () => packedAnchor,
+          getCameraZoom: () => 1,
           getNodeWorldPosition: () => nodeWorld,
-          getNodeScreenPosition: () => ({ x: 400, y: 300, visible: true }),
           getViewportSize: () => ({ width: 1200, height: 800 }),
           worldToScreen: (x: number, y: number) => ({ x, y }),
           focusNodeIds: null,
@@ -328,12 +344,8 @@ describe('GraphActivityHud', () => {
 
     const shell = host.querySelector('.z-10');
     expect(shell).not.toBeNull();
-    const expectedTop =
+    expect((shell as HTMLDivElement).style.left).toBe(`${laneRect.left}px`);
-      nodeWorld.y +
+    expect((shell as HTMLDivElement).style.top).toBe(`${laneRect.top}px`);
-      ACTIVITY_ANCHOR_LAYOUT.memberOffsetY +
-      ACTIVITY_ANCHOR_LAYOUT.reservedHeight -
-      220;
-    expect((shell as HTMLDivElement).style.top).toBe(`${Math.round(expectedTop)}px`);
 
     await act(async () => {
       root.unmount();

test/renderer/features/agent-graph/TeamGraphAdapter.test.ts

@@ -736,6 +736,80 @@ describe('TeamGraphAdapter particles', () => {
     ]);
   });
 
+  it('resolves task and process owners by stable owner id aliases, not only member names', () => {
+    const adapter = TeamGraphAdapter.create();
+
+    const graph = adapter.adapt(
+      createBaseTeamData({
+        config: {
+          name: 'My Team',
+          members: [
+            { name: 'team-lead', agentId: 'lead-agent' },
+            { name: 'alice', agentId: 'agent-alice' },
+          ],
+          projectPath: '/repo',
+        },
+        members: [
+          {
+            name: 'team-lead',
+            status: 'active',
+            currentTaskId: null,
+            taskCount: 0,
+            lastActiveAt: null,
+            messageCount: 0,
+            agentType: 'team-lead',
+            agentId: 'lead-agent',
+          },
+          {
+            name: 'alice',
+            status: 'active',
+            currentTaskId: null,
+            taskCount: 1,
+            lastActiveAt: null,
+            messageCount: 0,
+            agentId: 'agent-alice',
+          },
+        ],
+        tasks: [
+          {
+            id: 'task-owned-by-stable-id',
+            displayId: '#42',
+            subject: 'Stable owner task',
+            owner: 'agent-alice',
+            status: 'completed',
+            comments: [],
+            reviewState: 'none',
+          } as TeamTaskWithKanban,
+        ],
+        processes: [
+          {
+            id: 'proc-owned-by-stable-id',
+            label: 'Stable owner process',
+            pid: 4242,
+            registeredBy: 'agent-alice',
+            registeredAt: '2026-03-28T19:00:02.000Z',
+          },
+        ],
+      }),
+      'my-team'
+    );
+
+    expect(findNode(graph, 'task:my-team:task-owned-by-stable-id')).toMatchObject({
+      ownerId: 'member:my-team:agent-alice',
+      taskStatus: 'completed',
+    });
+    expect(findNode(graph, 'process:my-team:proc-owned-by-stable-id')).toMatchObject({
+      ownerId: 'member:my-team:agent-alice',
+    });
+    expect(
+      graph.edges.some(
+        (edge) =>
+          edge.id ===
+          'edge:own:member:my-team:agent-alice:task:my-team:task-owned-by-stable-id'
+      )
+    ).toBe(true);
+  });
+
   it('skips noisy idle inbox rows in the activity feed while keeping cross-team traffic on the lead lane', () => {
     const adapter = TeamGraphAdapter.create();
 

test/renderer/features/agent-graph/buildInlineActivityEntries.test.ts

@@ -199,4 +199,72 @@ describe('buildInlineActivityEntries', () => {
       taskRefs: [{ taskId: 'task-1', displayId: '#8fdd6803', teamName: 'my-team' }],
     });
   });
+
+  it('routes comment activity to a member lane when task.owner is stored as stable owner id', () => {
+    const data = createBaseTeamData({
+      config: {
+        name: 'My Team',
+        members: [{ name: 'team-lead', agentId: 'lead-agent' }, { name: 'jack', agentId: 'agent-jack' }],
+        projectPath: '/repo',
+      },
+      tasks: [
+        {
+          id: 'task-stable-owner',
+          displayId: '#91',
+          subject: 'Stable owner routing',
+          owner: 'agent-jack',
+          status: 'in_progress',
+          comments: [
+            {
+              id: 'comment-stable-owner',
+              author: 'team-lead',
+              text: 'Проверь финальную сводку перед merge',
+              createdAt: '2026-03-28T19:00:03.000Z',
+              type: 'regular',
+            },
+          ],
+          reviewState: 'none',
+        } as unknown as TeamTaskWithKanban,
+      ],
+      members: [
+        {
+          name: 'team-lead',
+          status: 'active',
+          currentTaskId: null,
+          taskCount: 0,
+          lastActiveAt: null,
+          messageCount: 0,
+          agentType: 'team-lead',
+          agentId: 'lead-agent',
+        },
+        {
+          name: 'jack',
+          status: 'active',
+          currentTaskId: null,
+          taskCount: 1,
+          lastActiveAt: null,
+          messageCount: 0,
+          agentId: 'agent-jack',
+        },
+      ],
+    });
+
+    const entries = buildInlineActivityEntries({
+      data,
+      teamName: 'my-team',
+      leadId: 'lead:my-team',
+      leadName: getGraphLeadMemberName(data, 'my-team'),
+      ownerNodeIds: new Set(['lead:my-team', 'member:my-team:agent-jack']),
+    });
+
+    expect(entries.get('member:my-team:agent-jack')).toEqual([
+      expect.objectContaining({
+        graphItem: expect.objectContaining({
+          id: 'activity:comment:my-team:task-stable-owner:comment-stable-owner',
+          title: '#91 Stable owner routing',
+          taskId: 'task-stable-owner',
+        }),
+      }),
+    ]);
+  });
 });

test/renderer/features/agent-graph/useGraphSimulation.test.ts

@@ -3,12 +3,15 @@ import { describe, expect, it, vi } from 'vitest';
 import {
   buildStableSlotLayoutSnapshot,
   computeOwnerFootprints,
+  computeProcessBandWidth,
   resolveNearestSlotAssignment,
   snapshotToWorldBounds,
   validateStableSlotLayout,
 } from '../../../../packages/agent-graph/src/layout/stableSlots';
+import { KanbanLayoutEngine } from '../../../../packages/agent-graph/src/layout/kanbanLayout';
+import { TASK_PILL } from '../../../../packages/agent-graph/src/constants/canvas-constants';
+import { ACTIVITY_LANE } from '../../../../packages/agent-graph/src/layout/activityLane';
 import { STABLE_SLOT_GEOMETRY } from '../../../../packages/agent-graph/src/layout/stableSlotGeometry';
-import { ACTIVITY_ANCHOR_LAYOUT } from '../../../../packages/agent-graph/src/layout/activityLane';
 
 import type { GraphLayoutPort, GraphNode } from '@claude-teams/agent-graph';
 
@@ -51,6 +54,17 @@ function createTask(
   };
 }
 
+function createProcess(teamName: string, processId: string, ownerId: string): GraphNode {
+  return {
+    id: `process:${teamName}:${processId}`,
+    kind: 'process',
+    label: processId,
+    state: 'active',
+    ownerId,
+    domainRef: { kind: 'process', teamName, processId },
+  };
+}
+
 describe('stable slot layout planner', () => {
   it('does not build a stable slot snapshot when the lead is missing', () => {
     const snapshot = buildStableSlotLayoutSnapshot({
@@ -96,7 +110,7 @@ describe('stable slot layout planner', () => {
     expect(validateStableSlotLayout(snapshot!)).toEqual({ valid: true });
   });
 
-  it('keeps a fixed process rail width centered inside the owner slot', () => {
+  it('builds a board band that contains both the activity column and kanban band', () => {
     const teamName = 'team-process-width';
     const lead = createLead(teamName);
     const alice = createMember(teamName, 'agent-alice', 'alice');
@@ -116,11 +130,61 @@ describe('stable slot layout planner', () => {
 
     const frame = snapshot?.memberSlotFrames[0];
     expect(frame).toBeDefined();
-    expect(frame?.processBandRect.width).toBe(STABLE_SLOT_GEOMETRY.processRailWidth);
+    expect(frame?.boardBandRect.top).toBe(frame?.activityColumnRect.top);
-    expect(frame?.processBandRect.left).toBeCloseTo(
+    expect(frame?.boardBandRect.top).toBe(frame?.kanbanBandRect.top);
-      (frame?.bounds.left ?? 0) + ((frame?.bounds.width ?? 0) - STABLE_SLOT_GEOMETRY.processRailWidth) / 2,
+    expect(frame?.activityColumnRect.left).toBe(frame?.boardBandRect.left);
-      6
+    expect(frame?.kanbanBandRect.left).toBeGreaterThan(frame?.activityColumnRect.right ?? 0);
+    expect(frame?.processBandRect.width).toBe(computeProcessBandWidth(0));
+  });
+
+  it('reserves a full empty activity column and minimum kanban width for idle members', () => {
+    const teamName = 'team-empty-slot';
+    const lead = createLead(teamName);
+    const alice = createMember(teamName, 'agent-alice', 'alice');
+    const layout: GraphLayoutPort = {
+      version: 'stable-slots-v1',
+      ownerOrder: [alice.id],
+      slotAssignments: {
+        [alice.id]: { ringIndex: 0, sectorIndex: 1 },
+      },
+    };
+
+    const [footprint] = computeOwnerFootprints([lead, alice], layout);
+
+    expect(footprint).toBeDefined();
+    expect(footprint?.activityColumnWidth).toBe(ACTIVITY_LANE.width);
+    expect(footprint?.activityColumnHeight).toBe(
+      ACTIVITY_LANE.headerHeight +
+        ACTIVITY_LANE.maxVisibleItems * ACTIVITY_LANE.rowHeight +
+        ACTIVITY_LANE.overflowHeight
     );
+    expect(footprint?.kanbanBandWidth).toBe(TASK_PILL.width);
+    expect(footprint?.boardBandHeight).toBe(
+      Math.max(footprint?.activityColumnHeight ?? 0, footprint?.kanbanBandHeight ?? 0)
+    );
+  });
+
+  it('grows process band width when an owner has multiple visible process nodes', () => {
+    const teamName = 'team-process-growth';
+    const lead = createLead(teamName);
+    const alice = createMember(teamName, 'agent-alice', 'alice');
+    const processes = Array.from({ length: 7 }, (_, index) =>
+      createProcess(teamName, `proc-${index + 1}`, alice.id)
+    );
+    const layout: GraphLayoutPort = {
+      version: 'stable-slots-v1',
+      ownerOrder: [alice.id],
+      slotAssignments: {
+        [alice.id]: { ringIndex: 0, sectorIndex: 1 },
+      },
+    };
+
+    const [footprint] = computeOwnerFootprints([lead, alice, ...processes], layout);
+
+    expect(footprint).toBeDefined();
+    expect(footprint?.processCount).toBe(7);
+    expect(footprint?.processBandWidth).toBe(computeProcessBandWidth(7));
+    expect((footprint?.processBandWidth ?? 0) > STABLE_SLOT_GEOMETRY.processRailWidth).toBe(true);
   });
 
   it('includes full topology bounds for fit, not only activity overlays', () => {
@@ -252,40 +316,34 @@ describe('stable slot layout planner', () => {
   it('computes the next ring radius from previous ring depth, not member count', () => {
     const teamName = 'team-ring-depth';
     const lead = createLead(teamName);
-    const members = Array.from({ length: 7 }, (_, index) =>
+    const first = createMember(teamName, 'agent-first', 'member-1');
-      createMember(teamName, `agent-${index + 1}`, `member-${index + 1}`)
+    const second = createMember(teamName, 'agent-second', 'member-2');
-    );
     const layout: GraphLayoutPort = {
       version: 'stable-slots-v1',
-      ownerOrder: members.map((member) => member.id),
+      ownerOrder: [first.id, second.id],
-      slotAssignments: Object.fromEntries(
+      slotAssignments: {
-        members.map((member, index) => [
+        [first.id]: { ringIndex: 0, sectorIndex: 1 },
-          member.id,
+        [second.id]: { ringIndex: 1, sectorIndex: 1 },
-          {
+      },
-            ringIndex: index < 6 ? 0 : 1,
-            sectorIndex: index % 6,
-          },
-        ])
-      ),
     };
 
     const snapshot = buildStableSlotLayoutSnapshot({
       teamName,
-      nodes: [lead, ...members],
+      nodes: [lead, first, second],
       layout,
     });
-    const footprints = computeOwnerFootprints([lead, ...members], layout);
+    const footprints = computeOwnerFootprints([lead, first, second], layout);
     const firstRingFrame = snapshot?.memberSlotFrames.find(
-      (frame) => frame.ringIndex === 0 && frame.sectorIndex === 0
+      (frame) => frame.ownerId === first.id
     );
     const secondRingFrame = snapshot?.memberSlotFrames.find(
-      (frame) => frame.ringIndex === 1 && frame.sectorIndex === 0
+      (frame) => frame.ownerId === second.id
     );
 
     expect(snapshot).not.toBeNull();
     expect(firstRingFrame).toBeDefined();
     expect(secondRingFrame).toBeDefined();
-    const firstFootprint = footprints[0];
+    const firstFootprint = footprints.find((footprint) => footprint.ownerId === first.id);
     expect(firstFootprint).toBeDefined();
     if (!firstFootprint) {
       throw new Error('expected first footprint for ring-depth test');
@@ -293,17 +351,82 @@ describe('stable slot layout planner', () => {
 
     const ringDelta = Math.hypot(secondRingFrame!.ownerX, secondRingFrame!.ownerY)
       - Math.hypot(firstRingFrame!.ownerX, firstRingFrame!.ownerY);
-    const ownerAnchorOffsetY =
+    const sectorVector = { x: 0.82, y: -0.57 };
-      STABLE_SLOT_GEOMETRY.memberSlotInnerPadding +
+    const ownerLocalY =
-      ACTIVITY_ANCHOR_LAYOUT.reservedHeight +
+      STABLE_SLOT_GEOMETRY.memberSlotInnerPadding + STABLE_SLOT_GEOMETRY.ownerBandHeight / 2;
-      STABLE_SLOT_GEOMETRY.slotVerticalGap +
+    const topOffset = -ownerLocalY;
-      STABLE_SLOT_GEOMETRY.ownerBandHeight / 2;
+    const bottomOffset = firstFootprint.slotHeight - ownerLocalY;
-    const expectedRingDelta =
+    const halfWidth = firstFootprint.slotWidth / 2;
-      ownerAnchorOffsetY +
+    const vectorLength = Math.hypot(sectorVector.x, sectorVector.y) || 1;
-      (firstFootprint.slotHeight - ownerAnchorOffsetY) +
+    const unitX = sectorVector.x / vectorLength;
-      STABLE_SLOT_GEOMETRY.ringGap;
+    const unitY = sectorVector.y / vectorLength;
+    const cornerProjections = [
+      { x: -halfWidth, y: topOffset },
+      { x: halfWidth, y: topOffset },
+      { x: halfWidth, y: bottomOffset },
+      { x: -halfWidth, y: bottomOffset },
+    ].map((corner) => corner.x * unitX + corner.y * unitY);
+    const outwardDepth = Math.max(...cornerProjections);
+    const inwardDepth = Math.max(...cornerProjections.map((projection) => -projection));
+    const expectedRingDelta = outwardDepth + inwardDepth + STABLE_SLOT_GEOMETRY.ringGap;
 
-    expect(ringDelta).toBeCloseTo(expectedRingDelta, 6);
+    expect(Math.abs(ringDelta - expectedRingDelta)).toBeLessThan(2);
+  });
+
+  it('keeps owned tasks out of unassigned topology when default sector candidates near the lead are invalid', () => {
+    const teamName = 'team-owned-tasks';
+    const lead = createLead(teamName);
+    const members = [
+      createMember(teamName, 'agent-alice', 'alice'),
+      createMember(teamName, 'agent-bob', 'bob'),
+      createMember(teamName, 'agent-tom', 'tom'),
+      createMember(teamName, 'agent-jack', 'jack'),
+    ];
+    const tasks = [
+      createTask(teamName, 'task-a', members[0].id, { taskStatus: 'completed' }),
+      createTask(teamName, 'task-b', members[1].id, { taskStatus: 'completed' }),
+      createTask(teamName, 'task-c', members[2].id, { taskStatus: 'completed' }),
+      createTask(teamName, 'task-d', members[3].id, { taskStatus: 'completed' }),
+    ];
+    const layout: GraphLayoutPort = {
+      version: 'stable-slots-v1',
+      ownerOrder: members.map((member) => member.id),
+      slotAssignments: {},
+    };
+
+    const nodes = [lead, ...members, ...tasks];
+    const snapshot = buildStableSlotLayoutSnapshot({
+      teamName,
+      nodes,
+      layout,
+    });
+
+    expect(snapshot).not.toBeNull();
+    expect(validateStableSlotLayout(snapshot!)).toEqual({ valid: true });
+    expect(snapshot?.unassignedTaskRect).toBeNull();
+
+    const memberSlotFrames = snapshot!.memberSlotFrames;
+    for (const frame of memberSlotFrames) {
+      const ownerNode = nodes.find((node) => node.id === frame.ownerId);
+      if (!ownerNode) {
+        continue;
+      }
+      ownerNode.x = frame.ownerX;
+      ownerNode.y = frame.ownerY;
+    }
+    KanbanLayoutEngine.layout(nodes, {
+      memberSlotFrames,
+      unassignedTaskRect: snapshot!.unassignedTaskRect,
+    });
+
+    for (const task of tasks) {
+      const ownerFrame = memberSlotFrames.find((frame) => frame.ownerId === task.ownerId);
+      expect(ownerFrame).toBeDefined();
+      expect(task.x).toBeGreaterThanOrEqual(ownerFrame!.kanbanBandRect.left);
+      expect(task.x).toBeLessThanOrEqual(ownerFrame!.kanbanBandRect.right);
+      expect(task.y).toBeGreaterThanOrEqual(ownerFrame!.kanbanBandRect.top);
+      expect(task.y).toBeLessThanOrEqual(ownerFrame!.kanbanBandRect.bottom);
+    }
   });
 
   it('keeps the same sector and spills to the next outer ring when the saved slot is already occupied', () => {