feat(tracker): Gantt scheduling schema (startDate + IssueRelation) + version bump

common/scripts/version.txt

@@ -1 +1 @@
-"0.7.422"
+"0.7.423"

models/tracker/src/__tests__/migration.test.ts

@@ -0,0 +1,49 @@
+//
+// Copyright © 2026 Hardcore Engineering Inc.
+//
+// Licensed under the Eclipse Public License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+//
+
+import { DOMAIN_TASK } from '@hcengineering/model-task'
+import tracker from '@hcengineering/tracker'
+
+import { DOMAIN_TRACKER } from '../types'
+import { migrateAddStartDate } from '../migration'
+
+describe('migrateAddStartDate', () => {
+  it('sets startDate=null on every Issue lacking the field (DOMAIN_TASK)', async () => {
+    const update = jest.fn().mockResolvedValue(undefined)
+    const client: any = { update }
+
+    await migrateAddStartDate(client)
+
+    expect(update).toHaveBeenCalledWith(
+      DOMAIN_TASK,
+      { _class: tracker.class.Issue, startDate: { $exists: false } },
+      { startDate: null }
+    )
+  })
+
+  it('sets startDate=null on every Milestone lacking the field (DOMAIN_TRACKER)', async () => {
+    const update = jest.fn().mockResolvedValue(undefined)
+    const client: any = { update }
+
+    await migrateAddStartDate(client)
+
+    expect(update).toHaveBeenCalledWith(
+      DOMAIN_TRACKER,
+      { _class: tracker.class.Milestone, startDate: { $exists: false } },
+      { startDate: null }
+    )
+  })
+
+  it('issues exactly two update calls (one per class)', async () => {
+    const update = jest.fn().mockResolvedValue(undefined)
+    const client: any = { update }
+
+    await migrateAddStartDate(client)
+
+    expect(update).toHaveBeenCalledTimes(2)
+  })
+})

models/tracker/src/index.ts

@@ -39,6 +39,7 @@ import {
   TClassicProjectTypeData,
   TComponent,
   TIssue,
+  TIssueRelation,
   TIssueStatus,
   TIssueTemplate,
   TIssueTypeData,
@@ -441,6 +442,7 @@ export function createModel (builder: Builder): void {
     TProject,
     TComponent,
     TIssue,
+    TIssueRelation,
     TIssueTemplate,
     TIssueStatus,
     TTypeIssuePriority,

models/tracker/src/migration.ts

@@ -47,6 +47,7 @@ import tracker, {
 } from '@hcengineering/tracker'
 
 import { classicIssueTaskStatuses } from '.'
+import { DOMAIN_TRACKER } from './types'
 
 async function createDefaultProject (tx: TxOperations): Promise<void> {
   const current = await tx.findOne(tracker.class.Project, {
@@ -170,6 +171,20 @@ async function migrateIdentifiers (client: MigrationClient): Promise<void> {
   }
 }
 
+export async function migrateAddStartDate (client: MigrationClient): Promise<void> {
+  // Issues live in DOMAIN_TASK; Milestones live in DOMAIN_TRACKER.
+  await client.update(
+    DOMAIN_TASK,
+    { _class: tracker.class.Issue, startDate: { $exists: false } },
+    { startDate: null }
+  )
+  await client.update(
+    DOMAIN_TRACKER,
+    { _class: tracker.class.Milestone, startDate: { $exists: false } },
+    { startDate: null }
+  )
+}
+
 async function migrateDefaultStatuses (client: MigrationClient, logger: ModelLogger): Promise<void> {
   const defaultTypeId = tracker.ids.ClassingProjectType
   const typeDescriptor = tracker.descriptors.ProjectType
@@ -398,6 +413,11 @@ export const trackerOperation: MigrateOperation = {
         state: 'migrateDefaultTypeMixins',
         mode: 'upgrade',
         func: migrateDefaultTypeMixins
+      },
+      {
+        state: 'gantt-add-startdate',
+        mode: 'upgrade',
+        func: migrateAddStartDate
       }
     ])
   },

models/tracker/src/types.ts

@@ -58,10 +58,12 @@ import time, { type ToDo } from '@hcengineering/time'
 import {
   type ProjectTargetPreference,
   type Component,
+  type DependencyKind,
   type Issue,
   type IssueChildInfo,
   type IssueParentInfo,
   type IssuePriority,
+  type IssueRelation,
   type IssueStatus,
   type IssueTemplate,
   type IssueTemplateChild,
@@ -233,6 +235,10 @@ export class TIssue extends TTask implements Issue {
   @ReadOnly()
   declare space: Ref<Project>
 
+  @Prop(TypeDate(DateRangeMode.DATETIME), tracker.string.IssueStartDate)
+  @Index(IndexKind.Indexed)
+  declare startDate: Timestamp | null
+
   @Prop(TypeDate(DateRangeMode.DATETIME), tracker.string.DueDate)
   declare dueDate: Timestamp | null
 
@@ -340,6 +346,28 @@ export class TTimeSpendReport extends TAttachedDoc implements TimeSpendReport {
   @Prop(TypeString(), tracker.string.TimeSpendReportDescription)
     description!: string
 }
+
+/**
+ * @public
+ */
+@Model(tracker.class.IssueRelation, core.class.AttachedDoc, DOMAIN_TRACKER)
+@UX(tracker.string.GanttDependency, tracker.icon.Issue)
+export class TIssueRelation extends TAttachedDoc implements IssueRelation {
+  @Prop(TypeRef(tracker.class.Issue), tracker.string.Issue)
+  declare attachedTo: Ref<Issue>
+
+  declare collection: 'relations'
+
+  @Prop(TypeRef(tracker.class.Issue), tracker.string.Issue)
+  @Index(IndexKind.Indexed)
+    target!: Ref<Issue>
+
+  @Prop(TypeString(), tracker.string.GanttDependency)
+    kind!: DependencyKind
+
+  @Prop(TypeNumber(), tracker.string.GanttLag)
+    lag!: number
+}
 /**
  * @public
  */
@@ -389,6 +417,9 @@ export class TMilestone extends TDoc implements Milestone {
   @Prop(Collection(attachment.class.Attachment), attachment.string.Attachments, { shortLabel: attachment.string.Files })
     attachments?: number
 
+  @Prop(TypeDate(), tracker.string.StartDate)
+    startDate!: Timestamp | null
+
   @Prop(TypeDate(), tracker.string.TargetDate)
     targetDate!: Timestamp
 

models/tracker/src/viewlets.ts

@@ -663,7 +663,7 @@ export function defineViewlets (builder: Builder): void {
       viewOptions: milestoneOptions,
       configOptions: {
         strict: true,
-        hiddenKeys: ['targetDate', 'label', 'description']
+        hiddenKeys: ['startDate', 'targetDate', 'label', 'description']
       },
       config: [
         {
@@ -672,6 +672,12 @@ export function defineViewlets (builder: Builder): void {
         },
         { key: '', presenter: tracker.component.MilestonePresenter, props: { shouldUseMargin: true } },
         { key: '', displayProps: { grow: true } },
+        {
+          key: '',
+          label: tracker.string.StartDate,
+          presenter: tracker.component.MilestoneDatePresenter,
+          props: { field: 'startDate' }
+        },
         {
           key: '',
           label: tracker.string.TargetDate,

packages/importer/src/importer/importer.ts

@@ -591,6 +591,7 @@ export class WorkspaceImporter {
       rank,
       comments: issue.comments?.length ?? 0,
       subIssues: issue.subdocs.length,
+      startDate: null,
       dueDate: null,
       parents: parentsInfo,
       remainingTime,

plugins/tracker-assets/lang/cs.json

@@ -115,6 +115,9 @@
     "NoAssignee": "Bez přiřazení",
     "LastUpdated": "Poslední aktualizace",
     "DueDate": "Datum splnění",
+    "IssueStartDate": "Datum zahájení",
+    "GanttDependency": "Dependency",
+    "GanttLag": "Lag",
     "Manual": "Manuální",
     "All": "Vše",
     "PastWeek": "Minulý týden",

plugins/tracker-assets/lang/de.json

@@ -125,6 +125,9 @@
     "NoAssignee": "Nicht zugewiesen",
     "LastUpdated": "Zuletzt aktualisiert",
     "DueDate": "Fälligkeitsdatum",
+    "IssueStartDate": "Startdatum",
+    "GanttDependency": "Abhängigkeit",
+    "GanttLag": "Verzögerung",
     "Manual": "Manuell",
     "All": "Alle",
     "PastWeek": "Letzte Woche",

plugins/tracker-assets/lang/en.json

@@ -125,6 +125,9 @@
     "NoAssignee": "No assignee",
     "LastUpdated": "Last updated",
     "DueDate": "Due date",
+    "IssueStartDate": "Start date",
+    "GanttDependency": "Dependency",
+    "GanttLag": "Lag",
     "Manual": "Manual",
     "All": "All",
     "PastWeek": "Past week",

plugins/tracker-assets/lang/es.json

@@ -123,6 +123,9 @@
     "NoAssignee": "Sin asignar",
     "LastUpdated": "Última actualización",
     "DueDate": "Fecha de vencimiento",
+    "IssueStartDate": "Fecha de inicio",
+    "GanttDependency": "Dependency",
+    "GanttLag": "Lag",
     "Manual": "Manual",
     "All": "Todos",
     "PastWeek": "Semana pasada",

plugins/tracker-assets/lang/fr.json

@@ -123,6 +123,9 @@
     "NoAssignee": "Non assigné",
     "LastUpdated": "Dernière mise à jour",
     "DueDate": "Date d'échéance",
+    "IssueStartDate": "Date de début",
+    "GanttDependency": "Dependency",
+    "GanttLag": "Lag",
     "Manual": "Manuel",
     "All": "Tous",
     "PastWeek": "La semaine passée",

plugins/tracker-assets/lang/it.json

@@ -123,6 +123,9 @@
     "NoAssignee": "Nessun assegnatario",
     "LastUpdated": "Ultimo aggiornamento",
     "DueDate": "Data di scadenza",
+    "IssueStartDate": "Data di inizio",
+    "GanttDependency": "Dependency",
+    "GanttLag": "Lag",
     "Manual": "Manuale",
     "All": "Tutti",
     "PastWeek": "Settimana scorsa",

plugins/tracker-assets/lang/ja.json

@@ -123,6 +123,9 @@
     "NoAssignee": "担当者なし",
     "LastUpdated": "最終更新日",
     "DueDate": "期日",
+    "IssueStartDate": "開始日",
+    "GanttDependency": "Dependency",
+    "GanttLag": "Lag",
     "Manual": "手動",
     "All": "すべて",
     "PastWeek": "先週",

plugins/tracker-assets/lang/ko.json

@@ -123,6 +123,9 @@
         "NoAssignee": "담당자 없음",
         "LastUpdated": "최근 업데이트",
         "DueDate": "마감일",
+        "IssueStartDate": "시작일",
+        "GanttDependency": "Dependency",
+        "GanttLag": "Lag",
         "Manual": "수동",
         "All": "전체",
         "PastWeek": "지난주",

plugins/tracker-assets/lang/pt-br.json

@@ -123,6 +123,9 @@
     "NoAssignee": "Sem atribuição",
     "LastUpdated": "Última atualização",
     "DueDate": "Data de vencimento",
+    "IssueStartDate": "Data de início",
+    "GanttDependency": "Dependency",
+    "GanttLag": "Lag",
     "Manual": "Manual",
     "All": "Todos",
     "PastWeek": "Semana passada",

plugins/tracker-assets/lang/pt.json

@@ -123,6 +123,9 @@
     "NoAssignee": "Sem atribuição",
     "LastUpdated": "Última atualização",
     "DueDate": "Data de vencimento",
+    "IssueStartDate": "Data de início",
+    "GanttDependency": "Dependency",
+    "GanttLag": "Lag",
     "Manual": "Manual",
     "All": "Todos",
     "PastWeek": "Semana passada",

plugins/tracker-assets/lang/ru.json

@@ -125,6 +125,9 @@
     "NoAssignee": "Нет исполнителя",
     "LastUpdated": "Последнее обновление",
     "DueDate": "Срок",
+    "IssueStartDate": "Дата начала",
+    "GanttDependency": "Dependency",
+    "GanttLag": "Lag",
     "Manual": "Пользовательский",
     "All": "Все",
     "PastWeek": "Предыдущая неделя",

plugins/tracker-assets/lang/tr.json

@@ -123,6 +123,9 @@
     "NoAssignee": "Atanan yok",
     "LastUpdated": "Son güncelleme",
     "DueDate": "Bitiş tarihi",
+    "IssueStartDate": "Başlangıç tarihi",
+    "GanttDependency": "Dependency",
+    "GanttLag": "Lag",
     "Manual": "Manuel",
     "All": "Tümü",
     "PastWeek": "Geçen hafta",

plugins/tracker-assets/lang/zh.json

@@ -125,6 +125,9 @@
     "NoAssignee": "无受理人",
     "LastUpdated": "最后更新",
     "DueDate": "截止日期",
+    "IssueStartDate": "开始日期",
+    "GanttDependency": "Dependency",
+    "GanttLag": "Lag",
     "Manual": "手动",
     "All": "全部",
     "PastWeek": "过去一周",

plugins/tracker-resources/src/components/CreateIssue.svelte

@@ -186,6 +186,7 @@
       priority: priority ?? IssuePriority.NoPriority,
       space: _space as Ref<Project>,
       component: component ?? $activeComponent ?? null,
+      startDate: null,
       dueDate: null,
       attachments: 0,
       estimation: 0,
@@ -312,6 +313,7 @@
         _id: generateId(),
         space: _space as Ref<Project>,
         subIssues: [],
+        startDate: null,
         dueDate: null,
         labels:
           p.labels !== undefined
@@ -488,6 +490,7 @@
         rank: '',
         comments: 0,
         subIssues: 0,
+        startDate: object.startDate,
         dueDate: object.dueDate,
         parents:
           parentIssue != null

plugins/tracker-resources/src/components/SubIssues.svelte

@@ -86,6 +86,7 @@
         rank: '',
         comments: 0,
         subIssues: 0,
+        startDate: subIssue.startDate ?? null,
         dueDate: null,
         parents,
         reportedTime: 0,