diff --git a/backend/main.py b/backend/main.py
index b60b845..52f24e5 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -68,11 +68,13 @@ from routers import (  # noqa: E402
     initiatives,
     me,
     milestones,
+    projects,
     roadmap,
     prompts,
     recurring,
     reviews,
     steering,
+    tasks,
     workspace,
 )
 
@@ -83,6 +85,9 @@ app.include_router(prompts.router)
 app.include_router(config.router)
 app.include_router(initiatives.router)
 app.include_router(actions.router)
+app.include_router(projects.initiative_router)
+app.include_router(projects.items_router)
+app.include_router(tasks.router)
 app.include_router(blockers.router)
 app.include_router(backlog.router)
 app.include_router(milestones.router)
diff --git a/backend/migrations/013_projects_and_tasks.sql b/backend/migrations/013_projects_and_tasks.sql
new file mode 100644
index 0000000..cd70892
--- /dev/null
+++ b/backend/migrations/013_projects_and_tasks.sql
@@ -0,0 +1,45 @@
+-- AP1.5: Project, Task, Action.project_id — operative Ist-Hierarchie
+
+CREATE TABLE projects (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    tenant_id UUID NOT NULL REFERENCES tenants(id) ON DELETE CASCADE,
+    initiative_id UUID NOT NULL REFERENCES initiatives(id) ON DELETE CASCADE,
+    title VARCHAR(255) NOT NULL,
+    description TEXT NOT NULL DEFAULT '',
+    status VARCHAR(32) NOT NULL DEFAULT 'active'
+        CHECK (status IN ('active', 'paused', 'completed', 'archived')),
+    roadmap_item_id UUID NULL REFERENCES roadmap_items(id) ON DELETE SET NULL,
+    sort_order INT NOT NULL DEFAULT 0,
+    target_date DATE NULL,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX idx_projects_tenant_initiative ON projects(tenant_id, initiative_id);
+CREATE INDEX idx_projects_tenant_status ON projects(tenant_id, status);
+CREATE INDEX idx_projects_roadmap_item ON projects(tenant_id, roadmap_item_id)
+    WHERE roadmap_item_id IS NOT NULL;
+
+ALTER TABLE actions
+    ADD COLUMN project_id UUID NULL REFERENCES projects(id) ON DELETE SET NULL;
+
+CREATE INDEX idx_actions_project ON actions(tenant_id, project_id)
+    WHERE project_id IS NOT NULL;
+
+CREATE TABLE tasks (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    tenant_id UUID NOT NULL REFERENCES tenants(id) ON DELETE CASCADE,
+    action_id UUID NOT NULL REFERENCES actions(id) ON DELETE CASCADE,
+    title VARCHAR(255) NOT NULL,
+    description TEXT NOT NULL DEFAULT '',
+    status VARCHAR(32) NOT NULL DEFAULT 'open'
+        CHECK (status IN ('open', 'in_progress', 'done', 'discarded')),
+    roadmap_item_id UUID NULL REFERENCES roadmap_items(id) ON DELETE SET NULL,
+    sort_order INT NOT NULL DEFAULT 0,
+    due_at TIMESTAMPTZ NULL,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX idx_tasks_tenant_action ON tasks(tenant_id, action_id);
+CREATE INDEX idx_tasks_tenant_status ON tasks(tenant_id, status);
diff --git a/backend/rights_registrations/operating_model_ops.py b/backend/rights_registrations/operating_model_ops.py
index 5320c6a..d0c01e3 100644
--- a/backend/rights_registrations/operating_model_ops.py
+++ b/backend/rights_registrations/operating_model_ops.py
@@ -171,3 +171,21 @@ register_capability(
         default_grants=(("portal", "admin"),),
     )
 )
+
+register_capability(
+    CapabilityRegistration(
+        key="kairo.project.read",
+        module="project",
+        description="Projekte im aktiven Tenant lesen",
+        default_grants=_MEMBER_READ,
+    )
+)
+
+register_capability(
+    CapabilityRegistration(
+        key="kairo.project.manage",
+        module="project",
+        description="Projekte anlegen und bearbeiten",
+        default_grants=_MEMBER_MANAGE,
+    )
+)
diff --git a/backend/routers/actions.py b/backend/routers/actions.py
index b741400..71c1793 100644
--- a/backend/routers/actions.py
+++ b/backend/routers/actions.py
@@ -10,6 +10,7 @@ from data_layer import actions as dl_actions
 from fastapi import APIRouter, Depends, HTTPException
 from pydantic import BaseModel, Field
 from services import actions as action_service
+from services import tasks as task_service
 from tenant_context import TenantContext
 
 router = APIRouter(prefix="/api/actions", tags=["actions"])
@@ -24,6 +25,17 @@ class ActionUpdateRequest(BaseModel):
     priority: Optional[Literal["low", "normal", "high"]] = None
     due_at: Optional[str] = None
     clear_due_at: bool = False
+    project_id: Optional[str] = None
+    clear_project: bool = False
+
+
+class TaskCreateRequest(BaseModel):
+    title: str = Field(min_length=1, max_length=255)
+    description: str = ""
+    status: Literal["open", "in_progress", "done", "discarded"] = "open"
+    roadmap_item_id: Optional[str] = None
+    sort_order: int = 0
+    due_at: Optional[str] = None
 
 
 class ActionAssignmentsRequest(BaseModel):
@@ -40,6 +52,47 @@ def list_my_open_actions(
         raise HTTPException(status_code=400, detail=str(exc)) from exc
 
 
+@router.get("/{action_id}/tasks")
+def list_action_tasks(
+    action_id: str,
+    ctx: TenantContext = Depends(require_capability("kairo.action.read")),
+):
+    try:
+        return task_service.list_tasks_for_action(
+            tenant_id=ctx.tenant_id, action_id=action_id
+        )
+    except ValueError as exc:
+        raise HTTPException(status_code=400, detail=str(exc)) from exc
+
+
+@router.post("/{action_id}/tasks", status_code=201)
+def create_action_task(
+    action_id: str,
+    body: TaskCreateRequest,
+    ctx: TenantContext = Depends(require_capability("kairo.action.manage")),
+):
+    due_at = None
+    if body.due_at:
+        try:
+            due_at = datetime.fromisoformat(body.due_at.replace("Z", "+00:00"))
+        except ValueError as exc:
+            raise HTTPException(status_code=400, detail="Ungültiges due_at") from exc
+    try:
+        return task_service.create_task(
+            tenant_id=ctx.tenant_id,
+            action_id=action_id,
+            user_id=ctx.user_id,
+            title=body.title,
+            description=body.description,
+            status=body.status,
+            roadmap_item_id=body.roadmap_item_id,
+            sort_order=body.sort_order,
+            due_at=due_at,
+        )
+    except ValueError as exc:
+        raise HTTPException(status_code=400, detail=str(exc)) from exc
+
+
 @router.get("/{action_id}")
 def get_action(
     action_id: str,
@@ -74,6 +127,8 @@ def update_action(
             priority=body.priority,
             due_at=due_at,
             clear_due_at=body.clear_due_at,
+            project_id=body.project_id,
+            clear_project=body.clear_project,
         )
     except ValueError as exc:
         raise HTTPException(status_code=400, detail=str(exc)) from exc
diff --git a/backend/routers/initiatives.py b/backend/routers/initiatives.py
index 5721df2..535cd96 100644
--- a/backend/routers/initiatives.py
+++ b/backend/routers/initiatives.py
@@ -48,6 +48,7 @@ class ActionCreateRequest(BaseModel):
     ] = "open"
     priority: Literal["low", "normal", "high"] = "normal"
     due_at: Optional[str] = None
+    project_id: Optional[str] = None
     assigned_actor_ids: list[str] = Field(default_factory=list)
 
 
@@ -249,6 +250,7 @@ def create_initiative_action(
             status=body.status,
             priority=body.priority,
             due_at=due_at,
+            project_id=body.project_id,
             assigned_actor_ids=body.assigned_actor_ids,
             user_id=ctx.user_id,
         )
diff --git a/backend/routers/projects.py b/backend/routers/projects.py
new file mode 100644
index 0000000..fc78bb2
--- /dev/null
+++ b/backend/routers/projects.py
@@ -0,0 +1,119 @@
+"""Project API — AP1.5."""
+
+from __future__ import annotations
+
+from datetime import date
+from typing import Literal, Optional
+
+from capabilities import require_capability
+from fastapi import APIRouter, Depends, HTTPException
+from pydantic import BaseModel, Field
+from services import projects as project_service
+from tenant_context import TenantContext
+
+initiative_router = APIRouter(prefix="/api/initiatives", tags=["projects"])
+items_router = APIRouter(prefix="/api/projects", tags=["projects"])
+
+
+class ProjectCreateRequest(BaseModel):
+    title: str = Field(min_length=1, max_length=255)
+    description: str = ""
+    status: Literal["active", "paused", "completed", "archived"] = "active"
+    roadmap_item_id: Optional[str] = None
+    sort_order: int = 0
+    target_date: Optional[date] = None
+
+
+class ProjectUpdateRequest(BaseModel):
+    title: Optional[str] = Field(default=None, min_length=1, max_length=255)
+    description: Optional[str] = None
+    status: Optional[Literal["active", "paused", "completed", "archived"]] = None
+    roadmap_item_id: Optional[str] = None
+    clear_roadmap_item: bool = False
+    sort_order: Optional[int] = None
+    target_date: Optional[date] = None
+    clear_target_date: bool = False
+
+
+@initiative_router.get("/{initiative_id}/projects")
+def list_initiative_projects(
+    initiative_id: str,
+    ctx: TenantContext = Depends(require_capability("kairo.project.read")),
+):
+    try:
+        return project_service.list_projects_for_initiative(
+            tenant_id=ctx.tenant_id, initiative_id=initiative_id
+        )
+    except ValueError as exc:
+        raise HTTPException(status_code=400, detail=str(exc)) from exc
+
+
+@initiative_router.post("/{initiative_id}/projects", status_code=201)
+def create_initiative_project(
+    initiative_id: str,
+    body: ProjectCreateRequest,
+    ctx: TenantContext = Depends(require_capability("kairo.project.manage")),
+):
+    try:
+        return project_service.create_project(
+            tenant_id=ctx.tenant_id,
+            initiative_id=initiative_id,
+            user_id=ctx.user_id,
+            title=body.title,
+            description=body.description,
+            status=body.status,
+            roadmap_item_id=body.roadmap_item_id,
+            sort_order=body.sort_order,
+            target_date=body.target_date,
+        )
+    except ValueError as exc:
+        raise HTTPException(status_code=400, detail=str(exc)) from exc
+
+
+@items_router.get("/{project_id}")
+def get_project(
+    project_id: str,
+    ctx: TenantContext = Depends(require_capability("kairo.project.read")),
+):
+    item = project_service.get_project(tenant_id=ctx.tenant_id, project_id=project_id)
+    if not item:
+        raise HTTPException(status_code=404, detail="Projekt nicht gefunden")
+    return item
+
+
+@items_router.patch("/{project_id}")
+def update_project(
+    project_id: str,
+    body: ProjectUpdateRequest,
+    ctx: TenantContext = Depends(require_capability("kairo.project.manage")),
+):
+    try:
+        item = project_service.update_project(
+            tenant_id=ctx.tenant_id,
+            project_id=project_id,
+            user_id=ctx.user_id,
+            title=body.title,
+            description=body.description,
+            status=body.status,
+            roadmap_item_id=body.roadmap_item_id,
+            clear_roadmap_item=body.clear_roadmap_item,
+            sort_order=body.sort_order,
+            target_date=body.target_date,
+            clear_target_date=body.clear_target_date,
+        )
+    except ValueError as exc:
+        raise HTTPException(status_code=400, detail=str(exc)) from exc
+    if not item:
+        raise HTTPException(status_code=404, detail="Projekt nicht gefunden")
+    return item
+
+
+@items_router.delete("/{project_id}", status_code=204)
+def delete_project(
+    project_id: str,
+    ctx: TenantContext = Depends(require_capability("kairo.project.manage")),
+):
+    if not project_service.delete_project(
+        tenant_id=ctx.tenant_id, project_id=project_id, user_id=ctx.user_id
+    ):
+        raise HTTPException(status_code=404, detail="Projekt nicht gefunden")
diff --git a/backend/routers/tasks.py b/backend/routers/tasks.py
new file mode 100644
index 0000000..af27c5f
--- /dev/null
+++ b/backend/routers/tasks.py
@@ -0,0 +1,69 @@
+"""Task item API — AP1.5."""
+
+from __future__ import annotations
+
+from datetime import datetime
+from typing import Literal, Optional
+
+from capabilities import require_capability
+from fastapi import APIRouter, Depends, HTTPException
+from pydantic import BaseModel, Field
+from services import tasks as task_service
+from tenant_context import TenantContext
+
+router = APIRouter(prefix="/api/tasks", tags=["tasks"])
+
+
+class TaskUpdateRequest(BaseModel):
+    title: Optional[str] = Field(default=None, min_length=1, max_length=255)
+    description: Optional[str] = None
+    status: Optional[Literal["open", "in_progress", "done", "discarded"]] = None
+    roadmap_item_id: Optional[str] = None
+    clear_roadmap_item: bool = False
+    sort_order: Optional[int] = None
+    due_at: Optional[str] = None
+    clear_due_at: bool = False
+
+
+@router.patch("/{task_id}")
+def update_task(
+    task_id: str,
+    body: TaskUpdateRequest,
+    ctx: TenantContext = Depends(require_capability("kairo.action.manage")),
+):
+    due_at = None
+    if body.due_at is not None:
+        try:
+            due_at = datetime.fromisoformat(body.due_at.replace("Z", "+00:00"))
+        except ValueError as exc:
+            raise HTTPException(status_code=400, detail="Ungültiges due_at") from exc
+    try:
+        item = task_service.update_task(
+            tenant_id=ctx.tenant_id,
+            task_id=task_id,
+            user_id=ctx.user_id,
+            title=body.title,
+            description=body.description,
+            status=body.status,
+            roadmap_item_id=body.roadmap_item_id,
+            clear_roadmap_item=body.clear_roadmap_item,
+            sort_order=body.sort_order,
+            due_at=due_at,
+            clear_due_at=body.clear_due_at,
+        )
+    except ValueError as exc:
+        raise HTTPException(status_code=400, detail=str(exc)) from exc
+    if not item:
+        raise HTTPException(status_code=404, detail="Task nicht gefunden")
+    return item
+
+
+@router.delete("/{task_id}", status_code=204)
+def delete_task(
+    task_id: str,
+    ctx: TenantContext = Depends(require_capability("kairo.action.manage")),
+):
+    if not task_service.delete_task(
+        tenant_id=ctx.tenant_id, task_id=task_id, user_id=ctx.user_id
+    ):
+        raise HTTPException(status_code=404, detail="Task nicht gefunden")
diff --git a/backend/services/actions.py b/backend/services/actions.py
index 6bab3aa..5c29d75 100644
--- a/backend/services/actions.py
+++ b/backend/services/actions.py
@@ -22,14 +22,14 @@ OPEN_ACTION_STATUSES = frozenset(
 )
 
 _ACTION_COLUMNS = """
-    id, tenant_id, initiative_id, title, description,
+    id, tenant_id, initiative_id, project_id, title, description,
     status, priority, due_at, created_at, updated_at
 """
 
 
 def _serialize_row(row: dict[str, Any]) -> dict[str, Any]:
     result = dict(row)
-    for key in ("id", "tenant_id", "initiative_id", "owner_actor_id"):
+    for key in ("id", "tenant_id", "initiative_id", "project_id", "owner_actor_id"):
         if result.get(key):
             result[key] = str(result[key])
     if result.get("created_at"):
@@ -99,6 +99,27 @@ def _actor_in_tenant(*, tenant_id: str, actor_id: str) -> bool:
         conn.close()
 
 
+def _validate_project_in_initiative(
+    *, tenant_id: str, initiative_id: str, project_id: Optional[str]
+) -> None:
+    if not project_id:
+        return
+    conn = get_connection()
+    try:
+        with conn.cursor() as cur:
+            cur.execute(
+                """
+                SELECT 1 FROM projects
+                WHERE id = %s AND tenant_id = %s AND initiative_id = %s
+                """,
+                (project_id, tenant_id, initiative_id),
+            )
+            if not cur.fetchone():
+                raise ValueError("Projekt gehört nicht zum Vorhaben")
+    finally:
+        conn.close()
+
+
 def create_action(
     *,
     tenant_id: str,
@@ -108,6 +129,7 @@ def create_action(
     status: ActionStatus = "open",
     priority: str = "normal",
     due_at: Optional[Any] = None,
+    project_id: Optional[str] = None,
     assigned_actor_ids: Optional[list[str]] = None,
     user_id: Optional[str] = None,
 ) -> dict[str, Any]:
@@ -118,6 +140,9 @@ def create_action(
     _validate_priority(priority)
     if not get_initiative(tenant_id=tenant_id, initiative_id=initiative_id):
         raise ValueError("Initiative nicht gefunden")
+    _validate_project_in_initiative(
+        tenant_id=tenant_id, initiative_id=initiative_id, project_id=project_id
+    )
 
     assigned_actor_ids = assigned_actor_ids or []
     for actor_id in assigned_actor_ids:
@@ -130,12 +155,13 @@ def create_action(
             cur.execute(
                 f"""
                 INSERT INTO actions (
-                    tenant_id, initiative_id, title, description, status, priority, due_at
+                    tenant_id, initiative_id, project_id, title, description,
+                    status, priority, due_at
                 )
-                VALUES (%s, %s, %s, %s, %s, %s, %s)
+                VALUES (%s, %s, %s, %s, %s, %s, %s, %s)
                 RETURNING {_ACTION_COLUMNS}
                 """,
-                (tenant_id, initiative_id, title, description, status, priority, due_at),
+                (tenant_id, initiative_id, project_id, title, description, status, priority, due_at),
             )
             row = _serialize_row(dict(cur.fetchone()))
             for actor_id in assigned_actor_ids:
@@ -221,6 +247,8 @@ def update_action(
     priority: Optional[str] = None,
     due_at: Optional[Any] = None,
     clear_due_at: bool = False,
+    project_id: Optional[str] = None,
+    clear_project: bool = False,
 ) -> Optional[dict[str, Any]]:
     existing = get_action(tenant_id=tenant_id, action_id=action_id)
     if not existing:
@@ -252,6 +280,16 @@ def update_action(
     elif due_at is not None:
         updates.append("due_at = %s")
         params.append(due_at)
+    if clear_project:
+        updates.append("project_id = NULL")
+    elif project_id is not None:
+        _validate_project_in_initiative(
+            tenant_id=tenant_id,
+            initiative_id=existing["initiative_id"],
+            project_id=project_id,
+        )
+        updates.append("project_id = %s")
+        params.append(project_id)
 
     if not updates:
         return existing
diff --git a/backend/services/projects.py b/backend/services/projects.py
new file mode 100644
index 0000000..09d5cf5
--- /dev/null
+++ b/backend/services/projects.py
@@ -0,0 +1,283 @@
+"""Project service — operative Struktur unter Initiative (AP1.5)."""
+
+from __future__ import annotations
+
+from datetime import date
+from typing import Any, Literal, Optional
+
+from psycopg2.extras import RealDictCursor
+
+from db import get_connection
+from services.audit import log_audit
+from services.initiatives import get_initiative
+
+ProjectStatus = Literal["active", "paused", "completed", "archived"]
+PROJECT_STATUSES = frozenset({"active", "paused", "completed", "archived"})
+
+_PROJECT_COLUMNS = """
+    id, tenant_id, initiative_id, title, description, status,
+    roadmap_item_id, sort_order, target_date, created_at, updated_at
+"""
+
+
+def _serialize_row(row: dict[str, Any]) -> dict[str, Any]:
+    result = dict(row)
+    for key in ("id", "tenant_id", "initiative_id", "roadmap_item_id"):
+        if result.get(key):
+            result[key] = str(result[key])
+    if result.get("target_date"):
+        result["target_date"] = (
+            result["target_date"].isoformat()
+            if hasattr(result["target_date"], "isoformat")
+            else str(result["target_date"])
+        )
+    for ts in ("created_at", "updated_at"):
+        if result.get(ts):
+            result[ts] = result[ts].isoformat()
+    return result
+
+
+def _validate_status(status: str) -> None:
+    if status not in PROJECT_STATUSES:
+        raise ValueError(f"Ungültiger Project-Status: {status}")
+
+
+def _validate_roadmap_item(
+    cur, *, tenant_id: str, initiative_id: str, roadmap_item_id: Optional[str]
+) -> None:
+    if not roadmap_item_id:
+        return
+    cur.execute(
+        """
+        SELECT 1 FROM roadmap_items ri
+        JOIN roadmaps r ON r.id = ri.roadmap_id AND r.tenant_id = ri.tenant_id
+        WHERE ri.id = %s AND ri.tenant_id = %s AND r.initiative_id = %s
+        """,
+        (roadmap_item_id, tenant_id, initiative_id),
+    )
+    if not cur.fetchone():
+        raise ValueError("Gate/Plan-Element gehört nicht zu diesem Vorhaben")
+
+
+def create_project(
+    *,
+    tenant_id: str,
+    initiative_id: str,
+    title: str,
+    description: str = "",
+    status: ProjectStatus = "active",
+    roadmap_item_id: Optional[str] = None,
+    sort_order: int = 0,
+    target_date: Optional[date] = None,
+    user_id: Optional[str] = None,
+) -> dict[str, Any]:
+    title = title.strip()
+    if not title:
+        raise ValueError("Titel ist erforderlich")
+    _validate_status(status)
+    if not get_initiative(tenant_id=tenant_id, initiative_id=initiative_id):
+        raise ValueError("Initiative nicht gefunden")
+
+    conn = get_connection()
+    try:
+        with conn.cursor(cursor_factory=RealDictCursor) as cur:
+            _validate_roadmap_item(
+                cur,
+                tenant_id=tenant_id,
+                initiative_id=initiative_id,
+                roadmap_item_id=roadmap_item_id,
+            )
+            cur.execute(
+                f"""
+                INSERT INTO projects (
+                    tenant_id, initiative_id, title, description, status,
+                    roadmap_item_id, sort_order, target_date
+                )
+                VALUES (%s, %s, %s, %s, %s, %s, %s, %s)
+                RETURNING {_PROJECT_COLUMNS}
+                """,
+                (
+                    tenant_id,
+                    initiative_id,
+                    title,
+                    description,
+                    status,
+                    roadmap_item_id,
+                    sort_order,
+                    target_date,
+                ),
+            )
+            row = _serialize_row(dict(cur.fetchone()))
+        conn.commit()
+    finally:
+        conn.close()
+
+    log_audit(
+        "project.created",
+        user_id=user_id,
+        tenant_id=tenant_id,
+        details={"project_id": row["id"], "initiative_id": initiative_id, "title": title},
+    )
+    return row
+
+
+def list_projects_for_initiative(
+    *, tenant_id: str, initiative_id: str
+) -> list[dict[str, Any]]:
+    if not get_initiative(tenant_id=tenant_id, initiative_id=initiative_id):
+        raise ValueError("Initiative nicht gefunden")
+
+    conn = get_connection()
+    try:
+        with conn.cursor(cursor_factory=RealDictCursor) as cur:
+            cur.execute(
+                f"""
+                SELECT {_PROJECT_COLUMNS}
+                FROM projects
+                WHERE tenant_id = %s AND initiative_id = %s
+                ORDER BY sort_order ASC, updated_at DESC, title
+                """,
+                (tenant_id, initiative_id),
+            )
+            return [_serialize_row(dict(r)) for r in cur.fetchall()]
+    finally:
+        conn.close()
+
+
+def get_project(*, tenant_id: str, project_id: str) -> Optional[dict[str, Any]]:
+    conn = get_connection()
+    try:
+        with conn.cursor(cursor_factory=RealDictCursor) as cur:
+            cur.execute(
+                f"""
+                SELECT {_PROJECT_COLUMNS}
+                FROM projects WHERE id = %s AND tenant_id = %s
+                """,
+                (project_id, tenant_id),
+            )
+            row = cur.fetchone()
+            return _serialize_row(dict(row)) if row else None
+    finally:
+        conn.close()
+
+
+def update_project(
+    *,
+    tenant_id: str,
+    project_id: str,
+    user_id: Optional[str] = None,
+    title: Optional[str] = None,
+    description: Optional[str] = None,
+    status: Optional[ProjectStatus] = None,
+    roadmap_item_id: Optional[str] = None,
+    clear_roadmap_item: bool = False,
+    sort_order: Optional[int] = None,
+    target_date: Optional[date] = None,
+    clear_target_date: bool = False,
+) -> Optional[dict[str, Any]]:
+    existing = get_project(tenant_id=tenant_id, project_id=project_id)
+    if not existing:
+        return None
+
+    updates: list[str] = []
+    params: list[Any] = []
+
+    if title is not None:
+        title = title.strip()
+        if not title:
+            raise ValueError("Titel ist erforderlich")
+        updates.append("title = %s")
+        params.append(title)
+    if description is not None:
+        updates.append("description = %s")
+        params.append(description)
+    if status is not None:
+        _validate_status(status)
+        updates.append("status = %s")
+        params.append(status)
+    if clear_roadmap_item:
+        updates.append("roadmap_item_id = NULL")
+    elif roadmap_item_id is not None:
+        conn = get_connection()
+        try:
+            with conn.cursor() as cur:
+                _validate_roadmap_item(
+                    cur,
+                    tenant_id=tenant_id,
+                    initiative_id=existing["initiative_id"],
+                    roadmap_item_id=roadmap_item_id,
+                )
+        finally:
+            conn.close()
+        updates.append("roadmap_item_id = %s")
+        params.append(roadmap_item_id)
+    if sort_order is not None:
+        updates.append("sort_order = %s")
+        params.append(sort_order)
+    if clear_target_date:
+        updates.append("target_date = NULL")
+    elif target_date is not None:
+        updates.append("target_date = %s")
+        params.append(target_date)
+
+    if not updates:
+        return existing
+
+    updates.append("updated_at = NOW()")
+    params.extend([project_id, tenant_id])
+
+    conn = get_connection()
+    try:
+        with conn.cursor(cursor_factory=RealDictCursor) as cur:
+            cur.execute(
+                f"""
+                UPDATE projects SET {", ".join(updates)}
+                WHERE id = %s AND tenant_id = %s
+                RETURNING {_PROJECT_COLUMNS}
+                """,
+                params,
+            )
+            row = cur.fetchone()
+            if not row:
+                return None
+            result = _serialize_row(dict(row))
+        conn.commit()
+    finally:
+        conn.close()
+
+    log_audit(
+        "project.updated",
+        user_id=user_id,
+        tenant_id=tenant_id,
+        details={"project_id": project_id},
+    )
+    return result
+
+
+def delete_project(
+    *, tenant_id: str, project_id: str, user_id: Optional[str] = None
+) -> bool:
+    conn = get_connection()
+    try:
+        with conn.cursor() as cur:
+            cur.execute(
+                "UPDATE actions SET project_id = NULL WHERE project_id = %s AND tenant_id = %s",
+                (project_id, tenant_id),
+            )
+            cur.execute(
+                "DELETE FROM projects WHERE id = %s AND tenant_id = %s RETURNING id",
+                (project_id, tenant_id),
+            )
+            deleted = cur.fetchone() is not None
+        conn.commit()
+    finally:
+        conn.close()
+
+    if deleted:
+        log_audit(
+            "project.deleted",
+            user_id=user_id,
+            tenant_id=tenant_id,
+            details={"project_id": project_id},
+        )
+    return deleted
diff --git a/backend/services/tasks.py b/backend/services/tasks.py
new file mode 100644
index 0000000..a296b64
--- /dev/null
+++ b/backend/services/tasks.py
@@ -0,0 +1,273 @@
+"""Task service — kleinste Einheit unter Action (AP1.5)."""
+
+from __future__ import annotations
+
+from datetime import datetime
+from typing import Any, Literal, Optional
+
+from psycopg2.extras import RealDictCursor
+
+from db import get_connection
+from services.actions import get_action
+from services.audit import log_audit
+
+TaskStatus = Literal["open", "in_progress", "done", "discarded"]
+TASK_STATUSES = frozenset({"open", "in_progress", "done", "discarded"})
+
+_TASK_COLUMNS = """
+    id, tenant_id, action_id, title, description, status,
+    roadmap_item_id, sort_order, due_at, created_at, updated_at
+"""
+
+
+def _serialize_row(row: dict[str, Any]) -> dict[str, Any]:
+    result = dict(row)
+    for key in ("id", "tenant_id", "action_id", "roadmap_item_id"):
+        if result.get(key):
+            result[key] = str(result[key])
+    if result.get("due_at"):
+        result["due_at"] = result["due_at"].isoformat()
+    for ts in ("created_at", "updated_at"):
+        if result.get(ts):
+            result[ts] = result[ts].isoformat()
+    return result
+
+
+def _validate_status(status: str) -> None:
+    if status not in TASK_STATUSES:
+        raise ValueError(f"Ungültiger Task-Status: {status}")
+
+
+def _get_action_or_raise(*, tenant_id: str, action_id: str) -> dict[str, Any]:
+    action = get_action(tenant_id=tenant_id, action_id=action_id)
+    if not action:
+        raise ValueError("Arbeitspaket nicht gefunden")
+    return action
+
+
+def _validate_roadmap_item_for_action(
+    cur, *, tenant_id: str, initiative_id: str, roadmap_item_id: Optional[str]
+) -> None:
+    if not roadmap_item_id:
+        return
+    cur.execute(
+        """
+        SELECT 1 FROM roadmap_items ri
+        JOIN roadmaps r ON r.id = ri.roadmap_id AND r.tenant_id = ri.tenant_id
+        WHERE ri.id = %s AND ri.tenant_id = %s AND r.initiative_id = %s
+        """,
+        (roadmap_item_id, tenant_id, initiative_id),
+    )
+    if not cur.fetchone():
+        raise ValueError("Gate gehört nicht zum Vorhaben des Arbeitspakets")
+
+
+def create_task(
+    *,
+    tenant_id: str,
+    action_id: str,
+    title: str,
+    description: str = "",
+    status: TaskStatus = "open",
+    roadmap_item_id: Optional[str] = None,
+    sort_order: int = 0,
+    due_at: Optional[datetime] = None,
+    user_id: Optional[str] = None,
+) -> dict[str, Any]:
+    title = title.strip()
+    if not title:
+        raise ValueError("Titel ist erforderlich")
+    _validate_status(status)
+    action = _get_action_or_raise(tenant_id=tenant_id, action_id=action_id)
+
+    conn = get_connection()
+    try:
+        with conn.cursor(cursor_factory=RealDictCursor) as cur:
+            _validate_roadmap_item_for_action(
+                cur,
+                tenant_id=tenant_id,
+                initiative_id=action["initiative_id"],
+                roadmap_item_id=roadmap_item_id,
+            )
+            cur.execute(
+                f"""
+                INSERT INTO tasks (
+                    tenant_id, action_id, title, description, status,
+                    roadmap_item_id, sort_order, due_at
+                )
+                VALUES (%s, %s, %s, %s, %s, %s, %s, %s)
+                RETURNING {_TASK_COLUMNS}
+                """,
+                (
+                    tenant_id,
+                    action_id,
+                    title,
+                    description,
+                    status,
+                    roadmap_item_id,
+                    sort_order,
+                    due_at,
+                ),
+            )
+            row = _serialize_row(dict(cur.fetchone()))
+        conn.commit()
+    finally:
+        conn.close()
+
+    log_audit(
+        "task.created",
+        user_id=user_id,
+        tenant_id=tenant_id,
+        details={"task_id": row["id"], "action_id": action_id, "title": title},
+    )
+    return row
+
+
+def list_tasks_for_action(*, tenant_id: str, action_id: str) -> list[dict[str, Any]]:
+    _get_action_or_raise(tenant_id=tenant_id, action_id=action_id)
+    conn = get_connection()
+    try:
+        with conn.cursor(cursor_factory=RealDictCursor) as cur:
+            cur.execute(
+                f"""
+                SELECT {_TASK_COLUMNS}
+                FROM tasks
+                WHERE tenant_id = %s AND action_id = %s
+                ORDER BY sort_order ASC, created_at ASC
+                """,
+                (tenant_id, action_id),
+            )
+            return [_serialize_row(dict(r)) for r in cur.fetchall()]
+    finally:
+        conn.close()
+
+
+def get_task(*, tenant_id: str, task_id: str) -> Optional[dict[str, Any]]:
+    conn = get_connection()
+    try:
+        with conn.cursor(cursor_factory=RealDictCursor) as cur:
+            cur.execute(
+                f"SELECT {_TASK_COLUMNS} FROM tasks WHERE id = %s AND tenant_id = %s",
+                (task_id, tenant_id),
+            )
+            row = cur.fetchone()
+            return _serialize_row(dict(row)) if row else None
+    finally:
+        conn.close()
+
+
+def update_task(
+    *,
+    tenant_id: str,
+    task_id: str,
+    user_id: Optional[str] = None,
+    title: Optional[str] = None,
+    description: Optional[str] = None,
+    status: Optional[TaskStatus] = None,
+    roadmap_item_id: Optional[str] = None,
+    clear_roadmap_item: bool = False,
+    sort_order: Optional[int] = None,
+    due_at: Optional[datetime] = None,
+    clear_due_at: bool = False,
+) -> Optional[dict[str, Any]]:
+    existing = get_task(tenant_id=tenant_id, task_id=task_id)
+    if not existing:
+        return None
+
+    action = _get_action_or_raise(tenant_id=tenant_id, action_id=existing["action_id"])
+    updates: list[str] = []
+    params: list[Any] = []
+
+    if title is not None:
+        title = title.strip()
+        if not title:
+            raise ValueError("Titel ist erforderlich")
+        updates.append("title = %s")
+        params.append(title)
+    if description is not None:
+        updates.append("description = %s")
+        params.append(description)
+    if status is not None:
+        _validate_status(status)
+        updates.append("status = %s")
+        params.append(status)
+    if clear_roadmap_item:
+        updates.append("roadmap_item_id = NULL")
+    elif roadmap_item_id is not None:
+        conn = get_connection()
+        try:
+            with conn.cursor() as cur:
+                _validate_roadmap_item_for_action(
+                    cur,
+                    tenant_id=tenant_id,
+                    initiative_id=action["initiative_id"],
+                    roadmap_item_id=roadmap_item_id,
+                )
+        finally:
+            conn.close()
+        updates.append("roadmap_item_id = %s")
+        params.append(roadmap_item_id)
+    if sort_order is not None:
+        updates.append("sort_order = %s")
+        params.append(sort_order)
+    if clear_due_at:
+        updates.append("due_at = NULL")
+    elif due_at is not None:
+        updates.append("due_at = %s")
+        params.append(due_at)
+
+    if not updates:
+        return existing
+
+    updates.append("updated_at = NOW()")
+    params.extend([task_id, tenant_id])
+
+    conn = get_connection()
+    try:
+        with conn.cursor(cursor_factory=RealDictCursor) as cur:
+            cur.execute(
+                f"""
+                UPDATE tasks SET {", ".join(updates)}
+                WHERE id = %s AND tenant_id = %s
+                RETURNING {_TASK_COLUMNS}
+                """,
+                params,
+            )
+            row = cur.fetchone()
+            if not row:
+                return None
+            result = _serialize_row(dict(row))
+        conn.commit()
+    finally:
+        conn.close()
+
+    log_audit(
+        "task.updated",
+        user_id=user_id,
+        tenant_id=tenant_id,
+        details={"task_id": task_id},
+    )
+    return result
+
+
+def delete_task(*, tenant_id: str, task_id: str, user_id: Optional[str] = None) -> bool:
+    conn = get_connection()
+    try:
+        with conn.cursor() as cur:
+            cur.execute(
+                "DELETE FROM tasks WHERE id = %s AND tenant_id = %s RETURNING id",
+                (task_id, tenant_id),
+            )
+            deleted = cur.fetchone() is not None
+        conn.commit()
+    finally:
+        conn.close()
+
+    if deleted:
+        log_audit(
+            "task.deleted",
+            user_id=user_id,
+            tenant_id=tenant_id,
+            details={"task_id": task_id},
+        )
+    return deleted
diff --git a/backend/tests/test_ap15_hierarchy.py b/backend/tests/test_ap15_hierarchy.py
new file mode 100644
index 0000000..eeb0950
--- /dev/null
+++ b/backend/tests/test_ap15_hierarchy.py
@@ -0,0 +1,75 @@
+"""AP1.5 — Project, Task, Action.project_id."""
+
+from __future__ import annotations
+
+from tests.factories import provision_user_in_tenant
+from tests.test_initiatives_actions import (
+    _auth,
+    _create_initiative,
+    _login,
+)
+
+
+def test_project_and_action_hierarchy(client):
+    user = provision_user_in_tenant(tenant_role="member")
+    token = _login(client, user)
+    initiative_id = _create_initiative(client, token).json()["id"]
+
+    project = client.post(
+        f"/api/initiatives/{initiative_id}/projects",
+        json={"title": "Karate Grundlagen", "description": "8 Fähigkeiten"},
+        headers=_auth(token),
+    )
+    assert project.status_code == 201
+    project_id = project.json()["id"]
+
+    action = client.post(
+        f"/api/initiatives/{initiative_id}/actions",
+        json={"title": "Kata Heian Shodan", "project_id": project_id},
+        headers=_auth(token),
+    )
+    assert action.status_code == 201
+    assert action.json()["project_id"] == project_id
+
+    task = client.post(
+        f"/api/actions/{action.json()['id']}/tasks",
+        json={"title": "Standfußarbeit üben"},
+        headers=_auth(token),
+    )
+    assert task.status_code == 201
+    assert task.json()["status"] == "open"
+
+    listed = client.get(
+        f"/api/actions/{action.json()['id']}/tasks",
+        headers=_auth(token),
+    )
+    assert listed.status_code == 200
+    assert len(listed.json()) == 1
+
+    projects = client.get(
+        f"/api/initiatives/{initiative_id}/projects",
+        headers=_auth(token),
+    )
+    assert projects.status_code == 200
+    assert len(projects.json()) == 1
+
+
+def test_initiative_without_projects_still_works(client):
+    user = provision_user_in_tenant(tenant_role="member")
+    token = _login(client, user)
+    initiative_id = _create_initiative(client, token).json()["id"]
+
+    action = client.post(
+        f"/api/initiatives/{initiative_id}/actions",
+        json={"title": "Freistehende Aufgabe"},
+        headers=_auth(token),
+    )
+    assert action.status_code == 201
+    assert action.json().get("project_id") is None
+
+    projects = client.get(
+        f"/api/initiatives/{initiative_id}/projects",
+        headers=_auth(token),
+    )
+    assert projects.status_code == 200
+    assert projects.json() == []
diff --git a/backend/tests/test_rights_registry.py b/backend/tests/test_rights_registry.py
index 706929f..1bb1db5 100644
--- a/backend/tests/test_rights_registry.py
+++ b/backend/tests/test_rights_registry.py
@@ -45,6 +45,8 @@ def test_registry_contains_initial_capabilities():
         "kairo.recurring.manage",
         "kairo.roadmap.reopen",
         "kairo.roadmap.reopen.emergency",
+        "kairo.project.read",
+        "kairo.project.manage",
     }
 
 
@@ -56,7 +58,7 @@ def test_sync_is_idempotent():
     try:
         with conn.cursor() as cur:
             cur.execute("SELECT COUNT(*) FROM capabilities")
-            assert cur.fetchone()[0] == 35
+            assert cur.fetchone()[0] == 37
             cur.execute("SELECT COUNT(*) FROM role_capability_grants")
             assert cur.fetchone()[0] >= 5
     finally:
diff --git a/backend/version.py b/backend/version.py
index 0f8fd6e..946151a 100644
--- a/backend/version.py
+++ b/backend/version.py
@@ -1,3 +1,3 @@
-APP_VERSION = "0.13.1-ap1.4b"
-DB_SCHEMA_VERSION = "012"
+APP_VERSION = "0.14.0-ap1.5"
+DB_SCHEMA_VERSION = "013"
 APP_NAME = "jinkendo-kairo"
diff --git a/docs/product/Kairo_Implementation_Truth_Table_v0.1.md b/docs/product/Kairo_Implementation_Truth_Table_v0.1.md
index a63eb3f..3b118ef 100644
--- a/docs/product/Kairo_Implementation_Truth_Table_v0.1.md
+++ b/docs/product/Kairo_Implementation_Truth_Table_v0.1.md
@@ -1,7 +1,7 @@
 # Kairo — Implementation Truth Table v0.1
 
 **Status:** living document — bei jedem AP aktualisieren  
-**Stand:** 2026-07-06 (nach AP1.4b)  
+**Stand:** 2026-07-06 (nach AP1.5)  
 **Zweck:** Ehrliche Trennung von **implementiert**, **teilweise**, **nur API/Schema**, **nur Dokumentiert**
 
 Verhindert, dass Zielbild-Dokumente als Ist-Stand gelesen werden.
@@ -30,7 +30,7 @@ Verhindert, dass Zielbild-Dokumente als Ist-Stand gelesen werden.
 | Capabilities | ✓ | Keine Objekt-Sichtbarkeit |
 | Auth / Session | ✓ | |
 | Audit (Auth/Admin) | ◐ | Nicht für alle OM-Events |
-| Migrationen nummeriert | ✓ | Schema 012 |
+| Migrationen nummeriert | ✓ | Schema 013 |
 
 ---
 
@@ -39,8 +39,8 @@ Verhindert, dass Zielbild-Dokumente als Ist-Stand gelesen werden.
 | Element | Stand | Anmerkung |
 |---------|-------|-----------|
 | Initiative | ✓ | |
-| Project | ○ | Schema/API teils; **keine GUI** |
-| Action | ✓ | UI-Label „Maßnahme“ |
+| Project | ◐ | AP1.5 GUI + API |
+| Action | ✓ | UI: Arbeitspaket (interim Maßnahme) |
 | ActionAssignment | ✓ | |
 | BacklogItem | ✓ | |
 | Blocker | ✓ | `action_id` optional |
@@ -49,7 +49,7 @@ Verhindert, dass Zielbild-Dokumente als Ist-Stand gelesen werden.
 | Decision | ✓ | |
 | Review | ✓ | |
 | RecurringElement | ✓ | |
-| Task (unter Action) | ✗ | |
+| Task (unter Action) | ◐ | AP1.5 minimal GUI |
 | Roadmap | ◐ | 1 pro Initiative; Migration 010 |
 | RoadmapItem | ◐ | Verify über Checkliste AP1.4b |
 | RoadmapItem Dependencies | ◐ | requires/blocks/related |
diff --git a/frontend/src/api/projects.js b/frontend/src/api/projects.js
new file mode 100644
index 0000000..490d84c
--- /dev/null
+++ b/frontend/src/api/projects.js
@@ -0,0 +1,23 @@
+import { apiFetch } from './client.js'
+
+export function listInitiativeProjects(initiativeId) {
+  return apiFetch(`/api/initiatives/${initiativeId}/projects`)
+}
+
+export function createInitiativeProject(initiativeId, body) {
+  return apiFetch(`/api/initiatives/${initiativeId}/projects`, {
+    method: 'POST',
+    body: JSON.stringify(body),
+  })
+}
+
+export function updateProject(projectId, body) {
+  return apiFetch(`/api/projects/${projectId}`, {
+    method: 'PATCH',
+    body: JSON.stringify(body),
+  })
+}
+
+export function deleteProject(projectId) {
+  return apiFetch(`/api/projects/${projectId}`, { method: 'DELETE' })
+}
diff --git a/frontend/src/api/tasks.js b/frontend/src/api/tasks.js
new file mode 100644
index 0000000..344662e
--- /dev/null
+++ b/frontend/src/api/tasks.js
@@ -0,0 +1,23 @@
+import { apiFetch } from './client.js'
+
+export function listActionTasks(actionId) {
+  return apiFetch(`/api/actions/${actionId}/tasks`)
+}
+
+export function createActionTask(actionId, body) {
+  return apiFetch(`/api/actions/${actionId}/tasks`, {
+    method: 'POST',
+    body: JSON.stringify(body),
+  })
+}
+
+export function updateTask(taskId, body) {
+  return apiFetch(`/api/tasks/${taskId}`, {
+    method: 'PATCH',
+    body: JSON.stringify(body),
+  })
+}
+
+export function deleteTask(taskId) {
+  return apiFetch(`/api/tasks/${taskId}`, { method: 'DELETE' })
+}
diff --git a/frontend/src/components/ActionForm.jsx b/frontend/src/components/ActionForm.jsx
index 0c7c8fb..2752fc3 100644
--- a/frontend/src/components/ActionForm.jsx
+++ b/frontend/src/components/ActionForm.jsx
@@ -11,6 +11,7 @@ function isoToLocalInput(iso) {
 
 export function ActionForm({
   initial = {},
+  projects = [],
   actors = [],
   actorsLoading = false,
   actorsError = null,
@@ -31,6 +32,7 @@ export function ActionForm({
       status: form.status.value,
       priority: form.priority.value,
       due_at: form.due_at.value ? new Date(form.due_at.value).toISOString() : null,
+      project_id: form.project_id?.value || undefined,
       assigned_actor_ids: selected,
     })
   }
@@ -75,6 +77,19 @@ export function ActionForm({
           defaultValue={isoToLocalInput(initial.due_at)}
         />
       </label>
+      {projects.length > 0 && (
+        <label>
+          Projekt (optional)
+          <select name="project_id" defaultValue={initial.project_id || ''}>
+            <option value="">— keins —</option>
+            {projects.map((p) => (
+              <option key={p.id} value={p.id}>
+                {p.title}
+              </option>
+            ))}
+          </select>
+        </label>
+      )}
       <ActorSelect
         actors={actors}
         defaultSelected={defaultActors}
diff --git a/frontend/src/components/InitiativeActionsHub.jsx b/frontend/src/components/InitiativeActionsHub.jsx
index 944cb80..521723c 100644
--- a/frontend/src/components/InitiativeActionsHub.jsx
+++ b/frontend/src/components/InitiativeActionsHub.jsx
@@ -5,6 +5,7 @@ import { EmptyState } from './EmptyState.jsx'
 export function InitiativeActionsHub({
   initiativeId,
   actions,
+  projects = [],
   actionContextById,
   hideDone,
   onHideDoneChange,
@@ -30,9 +31,10 @@ export function InitiativeActionsHub({
     <section className="card initiative-actions-hub">
       <div className="section-header">
         <div>
-          <h2>Maßnahmen — operative Arbeit</h2>
+          <h2>Arbeitspakete</h2>
           <p className="section-lead muted">
-            Blocker, Nachweise und Reviews hängen an der Maßnahme, nicht lose im Vorhaben.
+            Committete operative Einheit — Aufgaben im Detail. Blocker, Nachweise und Reviews
+            hängen am Arbeitspaket.
           </p>
         </div>
         <div className="section-actions">
@@ -50,7 +52,7 @@ export function InitiativeActionsHub({
               className="btn btn-primary btn-block-mobile"
               onClick={onToggleForm}
             >
-              {showForm ? 'Abbrechen' : 'Maßnahme anlegen'}
+              {showForm ? 'Abbrechen' : 'Arbeitspaket'}
             </button>
           )}
         </div>
@@ -59,6 +61,7 @@ export function InitiativeActionsHub({
       {showForm && canManage && (
         <div className="inline-form-block">
           <ActionForm
+            projects={projects}
             actors={actors}
             actorsLoading={actorsLoading}
             actorsError={actorsError}
@@ -67,13 +70,13 @@ export function InitiativeActionsHub({
             onSubmit={onCreateAction}
             onCancel={onToggleForm}
             busy={formBusy}
-            submitLabel="Maßnahme anlegen"
+            submitLabel="Arbeitspaket anlegen"
           />
         </div>
       )}
 
       {actions.length === 0 && (
-        <EmptyState message="Noch keine Maßnahmen — lege die erste operative Maßnahme an oder wandle Backlog um." />
+        <EmptyState message="Noch keine Arbeitspakete — lege operative Schritte an oder wandle Backlog um." />
       )}
 
       <div className="action-hub-grid">
diff --git a/frontend/src/components/InitiativeSubNav.jsx b/frontend/src/components/InitiativeSubNav.jsx
index 2be8770..e60511a 100644
--- a/frontend/src/components/InitiativeSubNav.jsx
+++ b/frontend/src/components/InitiativeSubNav.jsx
@@ -2,7 +2,7 @@ import { NavLink, useParams } from 'react-router-dom'
 
 const TABS = [
   { to: '', label: 'Steuerung', end: true },
-  { to: 'plan', label: 'Plan' },
+  { to: 'plan', label: 'Zielzustände' },
   { to: 'execution', label: 'Ausführung' },
   { to: 'inbox', label: 'Eingang' },
   { to: 'journey', label: 'Nachvollziehbarkeit' },
diff --git a/frontend/src/components/ProjectsSection.jsx b/frontend/src/components/ProjectsSection.jsx
new file mode 100644
index 0000000..3f4037f
--- /dev/null
+++ b/frontend/src/components/ProjectsSection.jsx
@@ -0,0 +1,124 @@
+import { useState } from 'react'
+import { EmptyState } from './EmptyState.jsx'
+import { StatusBadge } from './StatusBadge.jsx'
+
+export function ProjectsSection({
+  projects,
+  selectedProjectId,
+  onSelectProject,
+  canManage,
+  onCreate,
+  onDelete,
+  busy,
+}) {
+  const [title, setTitle] = useState('')
+  const [description, setDescription] = useState('')
+  const [showForm, setShowForm] = useState(false)
+
+  async function handleSubmit(e) {
+    e.preventDefault()
+    if (!title.trim()) return
+    await onCreate({
+      title: title.trim(),
+      description: description.trim(),
+    })
+    setTitle('')
+    setDescription('')
+    setShowForm(false)
+  }
+
+  return (
+    <section className="card projects-section">
+      <div className="section-header">
+        <div>
+          <h2>Projekte</h2>
+          <p className="section-lead muted">
+            Operative Struktur — Arbeitspakete gruppieren. Zielzustände (Gates) sind optional.
+          </p>
+        </div>
+        {canManage && (
+          <button
+            type="button"
+            className="btn btn-primary btn-block-mobile"
+            onClick={() => setShowForm((v) => !v)}
+          >
+            {showForm ? 'Abbrechen' : 'Projekt'}
+          </button>
+        )}
+      </div>
+
+      {showForm && canManage && (
+        <form className="inline-form-block" onSubmit={handleSubmit}>
+          <label>
+            Titel
+            <input
+              value={title}
+              onChange={(e) => setTitle(e.target.value)}
+              maxLength={255}
+              required
+              placeholder="z. B. Phase 1 — Grundlagen"
+            />
+          </label>
+          <label>
+            Beschreibung
+            <textarea
+              value={description}
+              onChange={(e) => setDescription(e.target.value)}
+              rows={2}
+            />
+          </label>
+          <button type="submit" className="btn btn-primary" disabled={busy}>
+            Anlegen
+          </button>
+        </form>
+      )}
+
+      {projects.length === 0 && (
+        <EmptyState message="Noch keine Projekte — optional. Du kannst auch direkt Arbeitspakete anlegen." />
+      )}
+
+      <ul className="item-list project-filter-list">
+        <li className="list-item card-list-item">
+          <button
+            type="button"
+            className={`btn btn-secondary${selectedProjectId === '' ? ' btn-primary' : ''}`}
+            onClick={() => onSelectProject('')}
+          >
+            Alle Arbeitspakete
+          </button>
+        </li>
+        {projects.map((project) => (
+          <li key={project.id} className="list-item card-list-item">
+            <div className="list-item-main">
+              <button
+                type="button"
+                className="link-button"
+                onClick={() =>
+                  onSelectProject(selectedProjectId === project.id ? '' : project.id)
+                }
+              >
+                <strong>{project.title}</strong>
+              </button>
+              {project.description && (
+                <p className="list-item-desc muted">{project.description}</p>
+              )}
+            </div>
+            <div className="list-item-meta action-controls">
+              <StatusBadge kind="initiative" status={project.status} />
+              {canManage && (
+                <button
+                  type="button"
+                  className="btn btn-secondary"
+                  disabled={busy}
+                  onClick={() => onDelete(project.id)}
+                >
+                  Löschen
+                </button>
+              )}
+            </div>
+          </li>
+        ))}
+      </ul>
+    </section>
+  )
+}
diff --git a/frontend/src/components/RoadmapPlanSection.jsx b/frontend/src/components/RoadmapPlanSection.jsx
index 9aa9151..313542b 100644
--- a/frontend/src/components/RoadmapPlanSection.jsx
+++ b/frontend/src/components/RoadmapPlanSection.jsx
@@ -67,10 +67,10 @@ export function RoadmapPlanSection({
     <section className="card">
       <div className="section-header">
         <div>
-          <h2>Plan</h2>
+          <h2>Zielzustände (Gates)</h2>
           <p className="section-lead muted">
-            Roadmap-Elemente methodenneutral — Gates, Reifegrade oder Review-Punkte.
-            Erreicht nur über Verify (Evidence, Review oder Decision).
+            Überprüfbare Zielpunkte — optional. Operative Planung läuft unter Ausführung.
+            Erreicht nur über Verify (Kriterien, Evidence, Review).
           </p>
         </div>
         {canManage && (
diff --git a/frontend/src/components/TasksSection.jsx b/frontend/src/components/TasksSection.jsx
new file mode 100644
index 0000000..031ed1a
--- /dev/null
+++ b/frontend/src/components/TasksSection.jsx
@@ -0,0 +1,151 @@
+import { useCallback, useEffect, useState } from 'react'
+import {
+  createActionTask,
+  deleteTask,
+  listActionTasks,
+  updateTask,
+} from '../api/tasks.js'
+import { TASK_STATUSES, TASK_STATUS_LABELS } from '../constants/status.js'
+import { EmptyState } from './EmptyState.jsx'
+
+export function TasksSection({ actionId, canManage }) {
+  const [tasks, setTasks] = useState([])
+  const [loading, setLoading] = useState(true)
+  const [error, setError] = useState(null)
+  const [busy, setBusy] = useState(false)
+  const [title, setTitle] = useState('')
+
+  const load = useCallback(async () => {
+    if (!actionId) return
+    setLoading(true)
+    setError(null)
+    try {
+      setTasks(await listActionTasks(actionId))
+    } catch (err) {
+      setError(err.message)
+    } finally {
+      setLoading(false)
+    }
+  }, [actionId])
+
+  useEffect(() => {
+    load()
+  }, [load])
+
+  async function handleCreate(e) {
+    e.preventDefault()
+    if (!title.trim()) return
+    setBusy(true)
+    try {
+      await createActionTask(actionId, { title: title.trim() })
+      setTitle('')
+      await load()
+    } catch (err) {
+      setError(err.message)
+    } finally {
+      setBusy(false)
+    }
+  }
+
+  async function handleStatus(taskId, status) {
+    setBusy(true)
+    try {
+      await updateTask(taskId, { status })
+      await load()
+    } catch (err) {
+      setError(err.message)
+    } finally {
+      setBusy(false)
+    }
+  }
+
+  async function handleDelete(taskId) {
+    setBusy(true)
+    try {
+      await deleteTask(taskId)
+      await load()
+    } catch (err) {
+      setError(err.message)
+    } finally {
+      setBusy(false)
+    }
+  }
+
+  if (loading) return <p className="muted">Tasks werden geladen…</p>
+
+  return (
+    <section className="card tasks-section">
+      <div className="section-header">
+        <div>
+          <h3>Aufgaben</h3>
+          <p className="section-lead muted">
+            Kleinste ausführbare Schritte — später Zuordnung zu Gates (Zielerreichung).
+          </p>
+        </div>
+      </div>
+
+      {error && <p className="error">{error}</p>}
+
+      {canManage && (
+        <form className="inline-form-block task-inline-form" onSubmit={handleCreate}>
+          <label>
+            Neue Aufgabe
+            <input
+              value={title}
+              onChange={(e) => setTitle(e.target.value)}
+              maxLength={255}
+              required
+              placeholder="Konkreter nächster Schritt"
+            />
+          </label>
+          <button type="submit" className="btn btn-primary" disabled={busy}>
+            Hinzufügen
+          </button>
+        </form>
+      )}
+
+      {tasks.length === 0 && (
+        <EmptyState message="Noch keine Aufgaben — zerlege das Arbeitspaket in umsetzbare Schritte." />
+      )}
+
+      <ul className="item-list task-list">
+        {tasks.map((task) => (
+          <li key={task.id} className="list-item card-list-item">
+            <div className="list-item-main">
+              <strong>{task.title}</strong>
+            </div>
+            <div className="list-item-meta action-controls">
+              {canManage ? (
+                <select
+                  className="inline-select"
+                  value={task.status}
+                  disabled={busy}
+                  onChange={(e) => handleStatus(task.id, e.target.value)}
+                  aria-label="Task-Status"
+                >
+                  {TASK_STATUSES.map((s) => (
+                    <option key={s} value={s}>
+                      {TASK_STATUS_LABELS[s]}
+                    </option>
+                  ))}
+                </select>
+              ) : (
+                <span>{TASK_STATUS_LABELS[task.status] || task.status}</span>
+              )}
+              {canManage && (
+                <button
+                  type="button"
+                  className="btn btn-secondary"
+                  disabled={busy}
+                  onClick={() => handleDelete(task.id)}
+                >
+                  Entfernen
+                </button>
+              )}
+            </div>
+          </li>
+        ))}
+      </ul>
+    </section>
+  )
+}
diff --git a/frontend/src/constants/status.js b/frontend/src/constants/status.js
index a4acbf9..a413217 100644
--- a/frontend/src/constants/status.js
+++ b/frontend/src/constants/status.js
@@ -15,6 +15,7 @@ export const EVIDENCE_STATUSES = ['submitted', 'accepted', 'rejected']
 export const DECISION_STATUSES = ['proposed', 'decided', 'superseded']
 export const REVIEW_STATUSES = ['planned', 'completed', 'skipped']
 export const RECURRING_STATUSES = ['active', 'paused', 'ended']
+export const TASK_STATUSES = ['open', 'in_progress', 'done', 'discarded']
 export const PRIORITIES = ['low', 'normal', 'high']
 export const OPEN_ACTION_STATUSES = ['open', 'ready', 'in_progress', 'blocked', 'review_required']
 
@@ -114,6 +115,13 @@ export const RECURRING_STATUS_LABELS = {
   ended: 'Beendet',
 }
 
+export const TASK_STATUS_LABELS = {
+  open: 'Offen',
+  in_progress: 'In Arbeit',
+  done: 'Erledigt',
+  discarded: 'Verworfen',
+}
+
 export const PRIORITY_LABELS = {
   low: 'Niedrig',
   normal: 'Normal',
diff --git a/frontend/src/context/InitiativeOperationsContext.jsx b/frontend/src/context/InitiativeOperationsContext.jsx
index b4322c1..fb6be98 100644
--- a/frontend/src/context/InitiativeOperationsContext.jsx
+++ b/frontend/src/context/InitiativeOperationsContext.jsx
@@ -34,6 +34,11 @@ import {
   deleteRoadmapItem,
   verifyRoadmapItemReached,
 } from '../api/roadmap.js'
+import {
+  listInitiativeProjects,
+  createInitiativeProject,
+  deleteProject,
+} from '../api/projects.js'
 import {
   listInitiativeEvidence,
   createInitiativeEvidence,
@@ -76,6 +81,8 @@ export function InitiativeOperationsProvider({ children }) {
   const [blockers, setBlockers] = useState([])
   const [backlogItems, setBacklogItems] = useState([])
   const [roadmapItems, setRoadmapItems] = useState([])
+  const [projects, setProjects] = useState([])
+  const [selectedProjectId, setSelectedProjectId] = useState('')
   const [evidenceItems, setEvidenceItems] = useState([])
   const [decisions, setDecisions] = useState([])
   const [reviews, setReviews] = useState([])
@@ -112,6 +119,7 @@ export function InitiativeOperationsProvider({ children }) {
         loads.push(listInitiativeBlockers(id).then(setBlockers).catch(() => setBlockers([])))
         loads.push(listInitiativeBacklog(id).then(setBacklogItems).catch(() => setBacklogItems([])))
         loads.push(listInitiativeRoadmapItems(id).then(setRoadmapItems).catch(() => setRoadmapItems([])))
+        loads.push(listInitiativeProjects(id).then(setProjects).catch(() => setProjects([])))
         loads.push(listInitiativeEvidence(id).then(setEvidenceItems).catch(() => setEvidenceItems([])))
         loads.push(listInitiativeDecisions(id).then(setDecisions).catch(() => setDecisions([])))
         loads.push(listInitiativeReviews(id).then(setReviews).catch(() => setReviews([])))
@@ -147,11 +155,16 @@ export function InitiativeOperationsProvider({ children }) {
   }, [load])
 
   const visibleActions = useMemo(
-    () =>
-      hideDone
+    () => {
+      let list = hideDone
         ? actions.filter((a) => a.status !== 'done' && a.status !== 'discarded')
-        : actions,
-    [actions, hideDone]
+        : actions
+      if (selectedProjectId) {
+        list = list.filter((a) => a.project_id === selectedProjectId)
+      }
+      return list
+    },
+    [actions, hideDone, selectedProjectId]
   )
 
   const actionContextById = useMemo(
@@ -185,7 +198,11 @@ export function InitiativeOperationsProvider({ children }) {
           : context?.actor?.id
             ? [context.actor.id]
             : []
-      await createInitiativeAction(id, { ...payload, assigned_actor_ids: assigned })
+      await createInitiativeAction(id, {
+        ...payload,
+        project_id: payload.project_id || selectedProjectId || undefined,
+        assigned_actor_ids: assigned,
+      })
       setShowActionForm(false)
       await load()
     } catch (err) {
@@ -205,6 +222,8 @@ export function InitiativeOperationsProvider({ children }) {
         priority: payload.priority,
         due_at: payload.due_at,
         clear_due_at: !payload.due_at,
+        project_id: payload.project_id,
+        clear_project: payload.project_id === '' || payload.project_id === null,
       })
       if (capabilities.has('kairo.action.manage')) {
         await setActionAssignments(actionId, payload.assigned_actor_ids || [])
@@ -386,6 +405,28 @@ export function InitiativeOperationsProvider({ children }) {
     }
   }
 
+  async function handleCreateProject(body) {
+    setFormBusy(true)
+    try {
+      await createInitiativeProject(id, body)
+      await load()
+    } catch (err) {
+      setError(err.message)
+    } finally {
+      setFormBusy(false)
+    }
+  }
+
+  async function handleDeleteProject(projectId) {
+    try {
+      await deleteProject(projectId)
+      if (selectedProjectId === projectId) setSelectedProjectId('')
+      await load()
+    } catch (err) {
+      setError(err.message)
+    }
+  }
+
   const milestones = useMemo(
     () => roadmapItems.filter((item) => item.item_type === 'milestone'),
     [roadmapItems]
@@ -520,6 +561,9 @@ export function InitiativeOperationsProvider({ children }) {
     unlinkedBlockers,
     backlogItems,
     roadmapItems,
+    projects,
+    selectedProjectId,
+    setSelectedProjectId,
     milestones,
     evidenceItems,
     decisions,
@@ -567,7 +611,9 @@ export function InitiativeOperationsProvider({ children }) {
     handleDeleteRoadmapItem,
     handleCreateMilestone: handleCreateRoadmapItem,
     handleMilestoneStatus: handleRoadmapItemStatus,
-    handleDeleteMilestone: handleDeleteRoadmapItem,
+    handleDeleteMilestone:     handleDeleteRoadmapItem,
+    handleCreateProject,
+    handleDeleteProject,
     handleCreateEvidence,
     handleEvidenceStatus,
     handleDeleteEvidence,
diff --git a/frontend/src/pages/ActionDetailPage.jsx b/frontend/src/pages/ActionDetailPage.jsx
index bae6aaa..88a8ed9 100644
--- a/frontend/src/pages/ActionDetailPage.jsx
+++ b/frontend/src/pages/ActionDetailPage.jsx
@@ -2,10 +2,12 @@ import { useCallback, useEffect, useState } from 'react'
 import { Link, useParams } from 'react-router-dom'
 import { getAction } from '../api/actions.js'
 import { getInitiativeSteeringSnapshot } from '../api/initiatives.js'
+import { listInitiativeProjects } from '../api/projects.js'
 import { updateAction, setActionAssignments } from '../api/actions.js'
 import { createInitiativeBlocker } from '../api/blockers.js'
 import { ActionHubCard } from '../components/ActionHubCard.jsx'
 import { ActionForm } from '../components/ActionForm.jsx'
+import { TasksSection } from '../components/TasksSection.jsx'
 import { ErrorState } from '../components/ErrorState.jsx'
 import { LoadingState } from '../components/LoadingState.jsx'
 import { useInitiativeOperations } from '../context/InitiativeOperationsContext.jsx'
@@ -24,11 +26,13 @@ function ActionDetailBody({
   formBusy,
   capabilities,
   actorsState,
+  projects = [],
 }) {
   if (editing) {
     return (
       <ActionForm
         initial={action}
+        projects={projects}
         actors={actorsState.actors}
         actorsLoading={actorsState.loading}
         actorsError={actorsState.error}
@@ -43,25 +47,31 @@ function ActionDetailBody({
   }
 
   return (
-    <ActionHubCard
-      action={action}
-      context={context}
-      editing={false}
-      onEdit={onEdit}
-      onCancelEdit={onCancelEdit}
-      onSubmitEdit={onSubmit}
-      onQuickStatus={onQuickStatus}
-      onCreateBlocker={onCreateBlocker}
-      canManage={capabilities.has('kairo.action.manage')}
-      canManageBlocker={capabilities.has('kairo.blocker.manage')}
-      formBusy={formBusy}
-      actors={actorsState.actors}
-      actorsLoading={actorsState.loading}
-      actorsError={actorsState.error}
-      actorsUsedFallback={actorsState.usedFallback}
-      onReloadActors={actorsState.reload}
-      detailMode
-    />
+    <>
+      <ActionHubCard
+        action={action}
+        context={context}
+        editing={false}
+        onEdit={onEdit}
+        onCancelEdit={onCancelEdit}
+        onSubmitEdit={onSubmit}
+        onQuickStatus={onQuickStatus}
+        onCreateBlocker={onCreateBlocker}
+        canManage={capabilities.has('kairo.action.manage')}
+        canManageBlocker={capabilities.has('kairo.blocker.manage')}
+        formBusy={formBusy}
+        actors={actorsState.actors}
+        actorsLoading={actorsState.loading}
+        actorsError={actorsState.error}
+        actorsUsedFallback={actorsState.usedFallback}
+        onReloadActors={actorsState.reload}
+        detailMode
+      />
+      <TasksSection
+        actionId={action.id}
+        canManage={capabilities.has('kairo.action.manage')}
+      />
+    </>
   )
 }
 
@@ -70,6 +80,7 @@ function ActionDetailStandalone() {
   const { capabilities } = useCapabilities()
   const actorsState = useActors()
   const [action, setAction] = useState(null)
+  const [projects, setProjects] = useState([])
   const [context, setContext] = useState(null)
   const [loading, setLoading] = useState(true)
   const [error, setError] = useState(null)
@@ -82,7 +93,11 @@ function ActionDetailStandalone() {
     try {
       const actionData = await getAction(actionId)
       setAction(actionData)
-      const snap = await getInitiativeSteeringSnapshot(actionData.initiative_id)
+      const [snap, projectData] = await Promise.all([
+        getInitiativeSteeringSnapshot(actionData.initiative_id),
+        listInitiativeProjects(actionData.initiative_id).catch(() => []),
+      ])
+      setProjects(projectData)
       setContext((snap.actions || []).find((a) => a.id === actionId) || null)
     } catch (err) {
       setError(err.message)
@@ -188,6 +203,7 @@ function ActionDetailStandalone() {
           formBusy={formBusy}
           capabilities={capabilities}
           actorsState={actorsState}
+          projects={projects}
         />
       </section>
     </div>
@@ -228,6 +244,7 @@ function ActionDetailNested() {
           usedFallback: ops.actorsUsedFallback,
           reload: ops.reloadActors,
         }}
+        projects={ops.projects}
       />
     </section>
   )
diff --git a/frontend/src/pages/initiative/InitiativeExecutionPage.jsx b/frontend/src/pages/initiative/InitiativeExecutionPage.jsx
index 259136c..d6ab19c 100644
--- a/frontend/src/pages/initiative/InitiativeExecutionPage.jsx
+++ b/frontend/src/pages/initiative/InitiativeExecutionPage.jsx
@@ -1,11 +1,15 @@
 import { useInitiativeOperations } from '../../context/InitiativeOperationsContext.jsx'
 import { InitiativeActionsHub } from '../../components/InitiativeActionsHub.jsx'
+import { ProjectsSection } from '../../components/ProjectsSection.jsx'
 import { BlockersSection } from '../../components/BlockersSection.jsx'
 
 export function InitiativeExecutionPage() {
   const ops = useInitiativeOperations()
   const {
     visibleActions,
+    projects,
+    selectedProjectId,
+    setSelectedProjectId,
     actionContextById,
     hideDone,
     setHideDone,
@@ -24,9 +28,20 @@ export function InitiativeExecutionPage() {
     <>
       {error && <p className="error">{error}</p>}
 
+      <ProjectsSection
+        projects={projects}
+        selectedProjectId={selectedProjectId}
+        onSelectProject={setSelectedProjectId}
+        canManage={capabilities.has('kairo.project.manage')}
+        onCreate={ops.handleCreateProject}
+        onDelete={ops.handleDeleteProject}
+        busy={formBusy}
+      />
+
       <InitiativeActionsHub
         initiativeId={initiativeId}
         actions={visibleActions}
+        projects={projects}
         actionContextById={actionContextById}
         hideDone={hideDone}
         onHideDoneChange={setHideDone}
@@ -56,7 +71,7 @@ export function InitiativeExecutionPage() {
         <BlockersSection
           blockers={unlinkedBlockers}
           heading="Vorhaben-Blocker"
-          lead="Ohne Maßnahmenbezug — verknüpfte Blocker erscheinen am Arbeitspaket."
+          lead="Ohne Arbeitspaketbezug — verknüpfte Blocker erscheinen am Arbeitspaket."
           emptyMessage="Keine vorhabenweiten Blocker."
           canManage={capabilities.has('kairo.blocker.manage')}
           onCreate={ops.handleCreateBlocker}
diff --git a/frontend/src/pages/initiative/RoadmapItemDetailPage.jsx b/frontend/src/pages/initiative/RoadmapItemDetailPage.jsx
index ae1731b..9e54812 100644
--- a/frontend/src/pages/initiative/RoadmapItemDetailPage.jsx
+++ b/frontend/src/pages/initiative/RoadmapItemDetailPage.jsx
@@ -131,7 +131,7 @@ export function RoadmapItemDetailPage() {
   return (
     <section className="card roadmap-item-detail">
       <p className="breadcrumb muted">
-        <Link to={`/initiatives/${initiativeId}/plan`}>Plan</Link>
+        <Link to={`/initiatives/${initiativeId}/plan`}>Zielzustände</Link>
         {' · '}
         {item.title}
       </p>