feat(A1): Progression Join-Graph und Multi-Strang-Horizon

join_gate, strand_project_id, Join-Auto-Schalten, multi-active Gates, Progression-Demo und PO-Lock-Spec. FE: Today strang-gruppiert, Join-Warteliste in Kontrolle.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/data_layer/initiative_snapshot.py

@@ -16,6 +16,7 @@ from steering.context import get_steering_context_dto
 from steering.kernel import evaluate_steering
 from steering.signals.snapshot_signals import derive_initiative_signals
 from services.initiatives import get_initiative
+from services.progression_graph import compute_progression_state
 from tenant_context import TenantContext
 
 OPEN_BLOCKER = ("open", "in_progress")
@@ -383,6 +384,9 @@ def get_initiative_steering_snapshot(
         "actions": actions,
         "roadmap_items": roadmap_items,
         "milestones": roadmap_items,
+        "progression_state": compute_progression_state(
+            tenant_id=ctx.tenant_id, initiative_id=initiative_id
+        ),
         "initiative_level": {
             "blockers": unlinked_blockers,
             "evidence": unlinked_evidence,

backend/migrations/032_a1_progression_join.sql

@@ -0,0 +1,26 @@
+-- AP-A1-PM-2: Progression graph — join_gate, strand binding, recurring strand
+
+ALTER TABLE roadmap_items
+    DROP CONSTRAINT IF EXISTS roadmap_items_item_type_check;
+
+ALTER TABLE roadmap_items
+    ADD CONSTRAINT roadmap_items_item_type_check
+    CHECK (item_type IN (
+        'milestone', 'review_gate', 'maturity_stage', 'work_cycle', 'join_gate'
+    ));
+
+ALTER TABLE roadmap_items
+    ADD COLUMN IF NOT EXISTS strand_project_id UUID NULL
+        REFERENCES projects(id) ON DELETE SET NULL;
+
+CREATE INDEX IF NOT EXISTS idx_roadmap_items_strand
+    ON roadmap_items(tenant_id, strand_project_id)
+    WHERE strand_project_id IS NOT NULL;
+
+ALTER TABLE recurring_elements
+    ADD COLUMN IF NOT EXISTS project_id UUID NULL
+        REFERENCES projects(id) ON DELETE SET NULL;
+
+CREATE INDEX IF NOT EXISTS idx_recurring_elements_project
+    ON recurring_elements(tenant_id, project_id)
+    WHERE project_id IS NOT NULL;

backend/routers/roadmap.py

@@ -18,7 +18,7 @@ router = APIRouter(tags=["roadmap"])
 
 class RoadmapItemCreateRequest(BaseModel):
     title: str = Field(min_length=1, max_length=255)
-    item_type: Literal["milestone", "review_gate", "maturity_stage", "work_cycle"] = "milestone"
+    item_type: Literal["milestone", "review_gate", "maturity_stage", "work_cycle", "join_gate"] = "milestone"
     goal_description: str = ""
     definition_of_done: list[Any] = Field(default_factory=list)
     status: Literal[
@@ -27,12 +27,13 @@ class RoadmapItemCreateRequest(BaseModel):
     sequencing_mode: Literal["sequential", "parallel", "optional"] = "sequential"
     target_date: Optional[date] = None
     sort_order: int = 0
+    strand_project_id: Optional[str] = None
     initial_criterion_title: Optional[str] = Field(default=None, max_length=500)
 
 
 class RoadmapItemUpdateRequest(BaseModel):
     title: Optional[str] = Field(default=None, min_length=1, max_length=255)
-    item_type: Optional[Literal["milestone", "review_gate", "maturity_stage", "work_cycle"]] = None
+    item_type: Optional[Literal["milestone", "review_gate", "maturity_stage", "work_cycle", "join_gate"]] = None
     goal_description: Optional[str] = None
     definition_of_done: Optional[list[Any]] = None
     status: Optional[
@@ -42,6 +43,8 @@ class RoadmapItemUpdateRequest(BaseModel):
     target_date: Optional[date] = None
     clear_target_date: bool = False
     sort_order: Optional[int] = None
+    strand_project_id: Optional[str] = None
+    clear_strand_project: bool = False
 
 
 class DependencyCreateRequest(BaseModel):
@@ -166,6 +169,21 @@ def get_initiative_roadmap_graph_state(
         raise HTTPException(status_code=400, detail=str(exc)) from exc
 
 
+@initiative_router.get("/{initiative_id}/roadmap/progression-state")
+def get_initiative_progression_state(
+    initiative_id: str,
+    ctx: TenantContext = Depends(require_capability("kairo.milestone.read")),
+):
+    try:
+        from services.progression_graph import compute_progression_state
+
+        return compute_progression_state(
+            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.get("/{initiative_id}/roadmap/plan-ist-view")
 def get_initiative_plan_ist_view(
     initiative_id: str,
@@ -228,6 +246,7 @@ def create_initiative_roadmap_item(
             sequencing_mode=body.sequencing_mode,
             target_date=body.target_date,
             sort_order=body.sort_order,
+            strand_project_id=body.strand_project_id,
             initial_criterion_title=body.initial_criterion_title,
         )
     except ValueError as exc:
@@ -265,6 +284,8 @@ def update_roadmap_item(
             target_date=body.target_date,
             clear_target_date=body.clear_target_date,
             sort_order=body.sort_order,
+            strand_project_id=body.strand_project_id,
+            clear_strand_project=body.clear_strand_project,
         )
     except ValueError as exc:
         raise HTTPException(status_code=400, detail=str(exc)) from exc

backend/services/archetype_starter_kit.py

@@ -312,6 +312,130 @@ def _apply_a2(
     }
 
 
+def apply_a1_progression_demo(
+    *,
+    tenant_id: str,
+    initiative_id: str,
+    user_id: Optional[str] = None,
+) -> dict[str, Any]:
+    """PO-Kernbild: 2 Stränge → Join → Ausgänge (AP-A1-PM-6). Idempotent wenn Struktur existiert."""
+    from services.maturity_practice import seed_practices_for_stage
+    from services.projects import create_project, list_projects_for_initiative
+    from services.roadmap import add_dependency, create_roadmap_item, list_roadmap_items_for_initiative
+
+    existing = list_roadmap_items_for_initiative(
+        tenant_id=tenant_id, initiative_id=initiative_id
+    )
+    if any(item.get("item_type") == "join_gate" for item in existing):
+        return {"applied": False, "reason": "progression_exists"}
+
+    projects = list_projects_for_initiative(tenant_id=tenant_id, initiative_id=initiative_id)
+    dehnung = _find_by_title(projects, "Dehnung")
+    if not dehnung:
+        dehnung = create_project(
+            tenant_id=tenant_id,
+            initiative_id=initiative_id,
+            title="Dehnung",
+            description="Strang Dehnung",
+            container_kind="stream",
+            sort_order=0,
+            user_id=user_id,
+        )
+    huft = _find_by_title(projects, "Hüftrotation")
+    if not huft:
+        huft = create_project(
+            tenant_id=tenant_id,
+            initiative_id=initiative_id,
+            title="Hüftrotation",
+            description="Strang Hüftrotation",
+            container_kind="stream",
+            sort_order=1,
+            user_id=user_id,
+        )
+
+    d1 = create_roadmap_item(
+        tenant_id=tenant_id,
+        initiative_id=initiative_id,
+        title="Dehnung — Einstieg",
+        item_type="maturity_stage",
+        status="active",
+        sort_order=10,
+        strand_project_id=dehnung["id"],
+        user_id=user_id,
+    )
+    h1 = create_roadmap_item(
+        tenant_id=tenant_id,
+        initiative_id=initiative_id,
+        title="Hüftrotation — Einstieg",
+        item_type="maturity_stage",
+        status="active",
+        sort_order=20,
+        strand_project_id=huft["id"],
+        user_id=user_id,
+    )
+    join = create_roadmap_item(
+        tenant_id=tenant_id,
+        initiative_id=initiative_id,
+        title="Mawashi Geri zur Hüfte",
+        item_type="join_gate",
+        status="planned",
+        sort_order=30,
+        user_id=user_id,
+    )
+    d2 = create_roadmap_item(
+        tenant_id=tenant_id,
+        initiative_id=initiative_id,
+        title="Dehnung — nach Join",
+        item_type="maturity_stage",
+        status="planned",
+        sort_order=40,
+        strand_project_id=dehnung["id"],
+        user_id=user_id,
+    )
+    h2 = create_roadmap_item(
+        tenant_id=tenant_id,
+        initiative_id=initiative_id,
+        title="Hüftrotation — nach Join",
+        item_type="maturity_stage",
+        status="planned",
+        sort_order=50,
+        strand_project_id=huft["id"],
+        user_id=user_id,
+    )
+
+    for from_id, to_id in (
+        (join["id"], d1["id"]),
+        (join["id"], h1["id"]),
+        (d2["id"], join["id"]),
+        (h2["id"], join["id"]),
+    ):
+        try:
+            add_dependency(
+                tenant_id=tenant_id,
+                from_item_id=from_id,
+                to_item_id=to_id,
+                dependency_type="requires",
+                user_id=user_id,
+            )
+        except ValueError as exc:
+            if "existiert bereits" not in str(exc):
+                raise
+
+    seed_practices_for_stage(
+        tenant_id=tenant_id, initiative_id=initiative_id, stage=d1, user_id=user_id
+    )
+    seed_practices_for_stage(
+        tenant_id=tenant_id, initiative_id=initiative_id, stage=h1, user_id=user_id
+    )
+
+    return {
+        "applied": True,
+        "projects": ["Dehnung", "Hüftrotation"],
+        "join": join["title"],
+        "active_gates": [d1["title"], h1["title"]],
+    }
+
+
 def _apply_b2b(
     *,
     tenant_id: str,

backend/services/maturity_practice.py

@@ -25,12 +25,24 @@ STAGE_PRACTICE_SETS: dict[str, list[tuple[str, str]]] = {
     "Stufe 3 — Ziel": [
         ("Voller Spagat", "Täglich Zielposition — Messwert dokumentieren"),
     ],
+    "Dehnung — Einstieg": [
+        ("Vorbeuge halten", "Täglich 3×30 Sek."),
+    ],
+    "Hüftrotation — Einstieg": [
+        ("Hüftkreisen im Stand", "Täglich 10 Wiederholungen je Richtung"),
+    ],
+    "Dehnung — nach Join": [
+        ("Enddehnung Mawashi-Vorbereitung", "Täglich 2×45 Sek."),
+    ],
+    "Hüftrotation — nach Join": [
+        ("Explosive Hüftrotation", "Täglich 3×8 Wiederholungen"),
+    ],
 }
 
 
-def get_active_maturity_stage(
+def get_active_maturity_stages(
     *, tenant_id: str, initiative_id: str
-) -> Optional[dict[str, Any]]:
+) -> list[dict[str, Any]]:
     from services.roadmap import list_roadmap_items_for_initiative
 
     stages = [
@@ -40,34 +52,17 @@ def get_active_maturity_stage(
         )
         if item.get("item_type") == "maturity_stage" and item.get("status") == "active"
     ]
-    if not stages:
-        return None
     stages.sort(key=lambda s: (s.get("sort_order", 0), s.get("title", "")))
-    return stages[0]
+    return stages
 
 
-def enforce_single_active_maturity_stage(
-    cur,
-    *,
-    tenant_id: str,
-    initiative_id: str,
-    keep_active_id: str,
-) -> None:
-    """At most one maturity_stage may be active."""
-    cur.execute(
-        """
-        UPDATE roadmap_items ri
-        SET status = 'planned', updated_at = NOW()
-        FROM roadmaps r
-        WHERE ri.roadmap_id = r.id
-          AND ri.tenant_id = %s
-          AND r.initiative_id = %s
-          AND ri.item_type = 'maturity_stage'
-          AND ri.status IN ('active', 'at_risk')
-          AND ri.id != %s
-        """,
-        (tenant_id, initiative_id, keep_active_id),
+def get_active_maturity_stage(
+    *, tenant_id: str, initiative_id: str
+) -> Optional[dict[str, Any]]:
+    stages = get_active_maturity_stages(
+        tenant_id=tenant_id, initiative_id=initiative_id
     )
+    return stages[0] if stages else None
 
 
 def list_practices_for_stage(
@@ -107,6 +102,34 @@ def pause_all_practices(
     return paused
 
 
+def pause_practices_except_stage(
+    *,
+    tenant_id: str,
+    initiative_id: str,
+    keep_stage_id: str,
+    strand_project_id: Optional[str] = None,
+    user_id: Optional[str] = None,
+) -> list[str]:
+    paused: list[str] = []
+    for item in list_recurring_for_initiative(
+        tenant_id=tenant_id, initiative_id=initiative_id
+    ):
+        if item.get("status") != "active":
+            continue
+        if item.get("roadmap_item_id") == keep_stage_id:
+            continue
+        if strand_project_id is not None and item.get("project_id") != strand_project_id:
+            continue
+        update_recurring_element(
+            tenant_id=tenant_id,
+            recurring_id=item["id"],
+            status="paused",
+            user_id=user_id,
+        )
+        paused.append(item["title"])
+    return paused
+
+
 def seed_practices_for_stage(
     *,
     tenant_id: str,
@@ -117,6 +140,7 @@ def seed_practices_for_stage(
     """Idempotent: create missing exercises for a stage; activate existing."""
     stage_id = stage["id"]
     stage_title = stage.get("title") or ""
+    strand_project_id = stage.get("strand_project_id")
     defs = STAGE_PRACTICE_SETS.get(stage_title)
     if not defs:
         defs = [
@@ -161,6 +185,7 @@ def seed_practices_for_stage(
             interval_days=1,
             next_due_at=now,
             roadmap_item_id=stage_id,
+            project_id=strand_project_id,
             user_id=user_id,
         )
         created.append(row)
@@ -175,9 +200,19 @@ def activate_stage_practice_set(
     stage: dict[str, Any],
     user_id: Optional[str] = None,
 ) -> dict[str, Any]:
-    paused = pause_all_practices(
-        tenant_id=tenant_id, initiative_id=initiative_id, user_id=user_id
-    )
+    strand_project_id = stage.get("strand_project_id")
+    if strand_project_id:
+        paused = pause_practices_except_stage(
+            tenant_id=tenant_id,
+            initiative_id=initiative_id,
+            keep_stage_id=stage["id"],
+            strand_project_id=strand_project_id,
+            user_id=user_id,
+        )
+    else:
+        paused = pause_all_practices(
+            tenant_id=tenant_id, initiative_id=initiative_id, user_id=user_id
+        )
     exercises = seed_practices_for_stage(
         tenant_id=tenant_id,
         initiative_id=initiative_id,

backend/services/maturity_stage_transition.py

@@ -1,12 +1,9 @@
-"""AP2.0e — Recurring transition when a maturity_stage is reached."""
+"""AP2.0e — maturity stage transition on verify reached (delegates to progression_graph)."""
 
 from __future__ import annotations
 
 from typing import Any, Optional
 
-from services.maturity_practice import activate_stage_practice_set
-from services.roadmap import get_roadmap_item, list_roadmap_items_for_initiative
-
 
 def on_maturity_stage_reached(
     *,
@@ -15,61 +12,14 @@ def on_maturity_stage_reached(
     reached_item_id: str,
     user_id: Optional[str] = None,
 ) -> Optional[dict[str, Any]]:
-    """Pause old routines, activate next stage, seed exercise set for next stage."""
-    item = get_roadmap_item(tenant_id=tenant_id, item_id=reached_item_id)
-    if not item or item.get("item_type") != "maturity_stage":
-        return None
+    from services.progression_graph import on_work_gate_reached
 
-    stages = [
-        s
-        for s in list_roadmap_items_for_initiative(
-            tenant_id=tenant_id, initiative_id=initiative_id
-        )
-        if s.get("item_type") == "maturity_stage"
-    ]
-    stages.sort(key=lambda s: (s.get("sort_order", 0), s.get("title", "")))
-
-    reached_index = next(
-        (index for index, stage in enumerate(stages) if stage["id"] == reached_item_id),
-        None,
+    return on_work_gate_reached(
+        tenant_id=tenant_id,
+        initiative_id=initiative_id,
+        reached_item_id=reached_item_id,
+        user_id=user_id,
     )
-    if reached_index is None:
-        return None
-
-    next_stage = None
-    for stage in stages[reached_index + 1 :]:
-        if stage.get("status") in {"planned", "active", "at_risk"}:
-            next_stage = stage
-            break
-
-    practice_transition = None
-    if next_stage:
-        from services.roadmap import update_roadmap_item
-
-        update_roadmap_item(
-            tenant_id=tenant_id,
-            item_id=next_stage["id"],
-            status="active",
-            user_id=user_id,
-        )
-        next_stage = get_roadmap_item(tenant_id=tenant_id, item_id=next_stage["id"])
-        if next_stage:
-            practice_transition = activate_stage_practice_set(
-                tenant_id=tenant_id,
-                initiative_id=initiative_id,
-                stage=next_stage,
-                user_id=user_id,
-            )
-
-    return {
-        "reached_stage_id": reached_item_id,
-        "next_stage_id": next_stage["id"] if next_stage else None,
-        "paused_recurring": (practice_transition or {}).get("paused_practices", []),
-        "new_recurring_id": (
-            (practice_transition or {}).get("practice_ids") or [None]
-        )[0],
-        "active_practices": (practice_transition or {}).get("active_practices", []),
-    }
 
 
 def on_maturity_stage_reopened(
@@ -79,7 +29,10 @@ def on_maturity_stage_reopened(
     stage_id: str,
     user_id: Optional[str] = None,
 ) -> dict[str, Any]:
-    """Re-enable exercise set for reopened stage; pause others."""
+    """Re-enable exercise set for reopened stage; pause others on same strand."""
+    from services.maturity_practice import activate_stage_practice_set
+    from services.roadmap import get_roadmap_item
+
     stage = get_roadmap_item(tenant_id=tenant_id, item_id=stage_id)
     if not stage:
         return {"stage_id": stage_id, "active_practices": []}

backend/services/progression_graph.py

@@ -0,0 +1,546 @@
+"""A1 progression graph — multi-strand work gates, join switch nodes (PO-Lock §10)."""
+
+from __future__ import annotations
+
+from typing import Any, Optional
+
+from psycopg2.extras import RealDictCursor
+
+from db import get_connection
+
+WORK_GATE_TYPES = frozenset({"maturity_stage"})
+JOIN_GATE_TYPE = "join_gate"
+ACTIVE_WORK_STATUSES = frozenset({"active", "at_risk"})
+TERMINAL_STATUSES = frozenset({"reached", "moved", "discarded"})
+
+
+def is_work_gate(item: dict[str, Any]) -> bool:
+    return item.get("item_type") in WORK_GATE_TYPES
+
+
+def is_join_gate(item: dict[str, Any]) -> bool:
+    return item.get("item_type") == JOIN_GATE_TYPE
+
+
+def _requires_deps(dependencies: list[dict[str, Any]]) -> list[dict[str, Any]]:
+    return [
+        dep
+        for dep in dependencies
+        if (dep.get("dependency_type") or "requires") == "requires"
+    ]
+
+
+def join_input_gate_ids(
+    join_id: str, dependencies: list[dict[str, Any]]
+) -> list[str]:
+    """Join requires input gates (from=join, to=input)."""
+    return [
+        str(dep["to_item_id"])
+        for dep in _requires_deps(dependencies)
+        if str(dep["from_item_id"]) == str(join_id)
+    ]
+
+
+def join_output_gate_ids(
+    join_id: str, dependencies: list[dict[str, Any]]
+) -> list[str]:
+    """Output gates require join (from=output, to=join)."""
+    return [
+        str(dep["from_item_id"])
+        for dep in _requires_deps(dependencies)
+        if str(dep["to_item_id"]) == str(join_id)
+    ]
+
+
+def successor_work_gate_ids(
+    gate_id: str, dependencies: list[dict[str, Any]]
+) -> list[str]:
+    """Work gates that require this gate (from=successor, to=gate)."""
+    return [
+        str(dep["from_item_id"])
+        for dep in _requires_deps(dependencies)
+        if str(dep["to_item_id"]) == str(gate_id)
+    ]
+
+
+def list_active_work_gates(
+    *, tenant_id: str, initiative_id: str
+) -> list[dict[str, Any]]:
+    from services.roadmap import list_roadmap_items_for_initiative
+
+    items = list_roadmap_items_for_initiative(
+        tenant_id=tenant_id, initiative_id=initiative_id
+    )
+    active = [
+        item
+        for item in items
+        if is_work_gate(item) and item.get("status") in ACTIVE_WORK_STATUSES
+    ]
+    active.sort(key=lambda item: (item.get("sort_order", 0), item.get("title", "")))
+    return active
+
+
+def compute_join_states(
+    *,
+    tenant_id: str,
+    initiative_id: str,
+) -> list[dict[str, Any]]:
+    from services.projects import list_projects_for_initiative
+    from services.roadmap import list_dependencies_for_initiative, list_roadmap_items_for_initiative
+
+    items = list_roadmap_items_for_initiative(
+        tenant_id=tenant_id, initiative_id=initiative_id
+    )
+    item_by_id = {str(item["id"]): item for item in items}
+    dependencies = list_dependencies_for_initiative(
+        tenant_id=tenant_id, initiative_id=initiative_id
+    )
+    projects = list_projects_for_initiative(
+        tenant_id=tenant_id, initiative_id=initiative_id
+    )
+    project_title = {str(p["id"]): p.get("title") or "" for p in projects}
+
+    joins = [item for item in items if is_join_gate(item)]
+    states: list[dict[str, Any]] = []
+
+    for join in joins:
+        join_id = str(join["id"])
+        input_ids = join_input_gate_ids(join_id, dependencies)
+        output_ids = join_output_gate_ids(join_id, dependencies)
+        pending: list[dict[str, Any]] = []
+        for input_id in input_ids:
+            gate = item_by_id.get(input_id)
+            if not gate:
+                continue
+            if gate.get("status") != "reached":
+                strand_id = gate.get("strand_project_id")
+                pending.append(
+                    {
+                        "gate_id": input_id,
+                        "title": gate.get("title") or input_id,
+                        "strand_project_id": strand_id,
+                        "strand_title": project_title.get(str(strand_id or ""), ""),
+                        "status": gate.get("status"),
+                    }
+                )
+        states.append(
+            {
+                "join_id": join_id,
+                "title": join.get("title") or "",
+                "status": join.get("status"),
+                "ready_to_switch": len(pending) == 0 and join.get("status") not in TERMINAL_STATUSES,
+                "pending_inputs": pending,
+                "output_gate_ids": output_ids,
+                "outputs": [
+                    {
+                        "gate_id": output_id,
+                        "title": (item_by_id.get(output_id) or {}).get("title") or output_id,
+                        "strand_project_id": (item_by_id.get(output_id) or {}).get(
+                            "strand_project_id"
+                        ),
+                    }
+                    for output_id in output_ids
+                    if output_id in item_by_id
+                ],
+            }
+        )
+    return states
+
+
+def compute_progression_state(
+    *, tenant_id: str, initiative_id: str
+) -> dict[str, Any]:
+    active_gates = list_active_work_gates(
+        tenant_id=tenant_id, initiative_id=initiative_id
+    )
+    return {
+        "active_work_gates": [
+            {
+                "id": gate["id"],
+                "title": gate.get("title"),
+                "strand_project_id": gate.get("strand_project_id"),
+                "status": gate.get("status"),
+            }
+            for gate in active_gates
+        ],
+        "joins": compute_join_states(
+            tenant_id=tenant_id, initiative_id=initiative_id
+        ),
+    }
+
+
+def enforce_single_active_work_gate_per_strand(
+    cur,
+    *,
+    tenant_id: str,
+    initiative_id: str,
+    keep_active_id: str,
+    strand_project_id: Optional[str],
+) -> None:
+    if strand_project_id:
+        cur.execute(
+            """
+            UPDATE roadmap_items ri
+            SET status = 'planned', updated_at = NOW()
+            FROM roadmaps r
+            WHERE ri.roadmap_id = r.id
+              AND ri.tenant_id = %s
+              AND r.initiative_id = %s
+              AND ri.item_type = 'maturity_stage'
+              AND ri.status IN ('active', 'at_risk')
+              AND ri.strand_project_id = %s
+              AND ri.id != %s
+            """,
+            (tenant_id, initiative_id, strand_project_id, keep_active_id),
+        )
+        return
+
+    cur.execute(
+        """
+        UPDATE roadmap_items ri
+        SET status = 'planned', updated_at = NOW()
+        FROM roadmaps r
+        WHERE ri.roadmap_id = r.id
+          AND ri.tenant_id = %s
+          AND r.initiative_id = %s
+          AND ri.item_type = 'maturity_stage'
+          AND ri.status IN ('active', 'at_risk')
+          AND ri.strand_project_id IS NULL
+          AND ri.id != %s
+        """,
+        (tenant_id, initiative_id, keep_active_id),
+    )
+
+
+def _graph_ready(
+    item_id: str,
+    *,
+    item_by_id: dict[str, dict[str, Any]],
+    dependencies: list[dict[str, Any]],
+) -> bool:
+    for dep in _requires_deps(dependencies):
+        if str(dep["from_item_id"]) != str(item_id):
+            continue
+        prereq = item_by_id.get(str(dep["to_item_id"]))
+        if not prereq:
+            continue
+        if prereq.get("status") != "reached":
+            return False
+    return True
+
+
+def activate_work_gate(
+    *,
+    tenant_id: str,
+    initiative_id: str,
+    gate: dict[str, Any],
+    user_id: Optional[str] = None,
+    seed_practices: bool = True,
+) -> dict[str, Any]:
+    from services.maturity_practice import activate_stage_practice_set
+    from services.roadmap import get_roadmap_item, update_roadmap_item
+
+    gate_id = gate["id"]
+    updated = update_roadmap_item(
+        tenant_id=tenant_id,
+        item_id=gate_id,
+        status="active",
+        user_id=user_id,
+    )
+    if not updated:
+        raise ValueError("Work-Gate konnte nicht aktiviert werden")
+
+    practice_result = None
+    if seed_practices:
+        fresh = get_roadmap_item(tenant_id=tenant_id, item_id=gate_id) or updated
+        practice_result = activate_stage_practice_set(
+            tenant_id=tenant_id,
+            initiative_id=initiative_id,
+            stage=fresh,
+            user_id=user_id,
+        )
+
+    return {
+        "gate_id": gate_id,
+        "gate_title": updated.get("title"),
+        "practice_transition": practice_result,
+    }
+
+
+def _mark_join_reached(
+    cur,
+    *,
+    tenant_id: str,
+    join_id: str,
+) -> None:
+    cur.execute(
+        """
+        UPDATE roadmap_items
+        SET status = 'reached', updated_at = NOW()
+        WHERE id = %s AND tenant_id = %s AND item_type = 'join_gate'
+        """,
+        (join_id, tenant_id),
+    )
+
+
+def try_switch_join(
+    *,
+    tenant_id: str,
+    initiative_id: str,
+    join_id: str,
+    user_id: Optional[str] = None,
+) -> Optional[dict[str, Any]]:
+    from services.audit import log_audit
+    from services.roadmap import get_roadmap_item, list_dependencies_for_initiative
+
+    join = get_roadmap_item(tenant_id=tenant_id, item_id=join_id)
+    if not join or not is_join_gate(join):
+        return None
+    if join.get("status") in TERMINAL_STATUSES:
+        return None
+
+    dependencies = list_dependencies_for_initiative(
+        tenant_id=tenant_id, initiative_id=initiative_id
+    )
+    item_by_id = {
+        str(item["id"]): item
+        for item in __import__(
+            "services.roadmap", fromlist=["list_roadmap_items_for_initiative"]
+        ).list_roadmap_items_for_initiative(
+            tenant_id=tenant_id, initiative_id=initiative_id
+        )
+    }
+
+    pending = [
+        input_id
+        for input_id in join_input_gate_ids(join_id, dependencies)
+        if item_by_id.get(input_id, {}).get("status") != "reached"
+    ]
+    if pending:
+        return None
+
+    output_ids = join_output_gate_ids(join_id, dependencies)
+    activated: list[dict[str, Any]] = []
+
+    conn = get_connection()
+    try:
+        with conn.cursor(cursor_factory=RealDictCursor) as cur:
+            _mark_join_reached(cur, tenant_id=tenant_id, join_id=join_id)
+        conn.commit()
+    finally:
+        conn.close()
+
+    for output_id in output_ids:
+        output_gate = item_by_id.get(output_id)
+        if not output_gate or not is_work_gate(output_gate):
+            continue
+        if output_gate.get("status") in TERMINAL_STATUSES:
+            continue
+        if not _graph_ready(output_id, item_by_id=item_by_id, dependencies=dependencies):
+            continue
+        activated.append(
+            activate_work_gate(
+                tenant_id=tenant_id,
+                initiative_id=initiative_id,
+                gate=output_gate,
+                user_id=user_id,
+            )
+        )
+
+    log_audit(
+        "progression.join_switched",
+        user_id=user_id,
+        tenant_id=tenant_id,
+        details={
+            "initiative_id": initiative_id,
+            "join_id": join_id,
+            "join_title": join.get("title"),
+            "activated_gate_ids": [item["gate_id"] for item in activated],
+        },
+    )
+
+    return {
+        "join_id": join_id,
+        "join_title": join.get("title"),
+        "activated": activated,
+    }
+
+
+def try_switch_joins_for_gate(
+    *,
+    tenant_id: str,
+    initiative_id: str,
+    gate_id: str,
+    user_id: Optional[str] = None,
+) -> list[dict[str, Any]]:
+    from services.roadmap import list_dependencies_for_initiative, list_roadmap_items_for_initiative
+
+    dependencies = list_dependencies_for_initiative(
+        tenant_id=tenant_id, initiative_id=initiative_id
+    )
+    joins = [
+        item
+        for item in list_roadmap_items_for_initiative(
+            tenant_id=tenant_id, initiative_id=initiative_id
+        )
+        if is_join_gate(item)
+    ]
+    switched: list[dict[str, Any]] = []
+    for join in joins:
+        join_id = str(join["id"])
+        inputs = join_input_gate_ids(join_id, dependencies)
+        if gate_id not in inputs:
+            continue
+        result = try_switch_join(
+            tenant_id=tenant_id,
+            initiative_id=initiative_id,
+            join_id=join_id,
+            user_id=user_id,
+        )
+        if result:
+            switched.append(result)
+    return switched
+
+
+def _legacy_linear_next_stage(
+    *,
+    tenant_id: str,
+    initiative_id: str,
+    reached_item_id: str,
+    user_id: Optional[str] = None,
+) -> Optional[dict[str, Any]]:
+    from services.roadmap import get_roadmap_item, list_roadmap_items_for_initiative, update_roadmap_item
+
+    stages = [
+        item
+        for item in list_roadmap_items_for_initiative(
+            tenant_id=tenant_id, initiative_id=initiative_id
+        )
+        if is_work_gate(item)
+    ]
+    stages.sort(key=lambda item: (item.get("sort_order", 0), item.get("title", "")))
+    reached_index = next(
+        (index for index, stage in enumerate(stages) if stage["id"] == reached_item_id),
+        None,
+    )
+    if reached_index is None:
+        return None
+
+    next_stage = None
+    for stage in stages[reached_index + 1 :]:
+        if stage.get("status") in {"planned", "active", "at_risk"}:
+            next_stage = stage
+            break
+    if not next_stage:
+        return None
+
+    update_roadmap_item(
+        tenant_id=tenant_id,
+        item_id=next_stage["id"],
+        status="active",
+        user_id=user_id,
+    )
+    fresh = get_roadmap_item(tenant_id=tenant_id, item_id=next_stage["id"])
+    if not fresh:
+        return None
+    return activate_work_gate(
+        tenant_id=tenant_id,
+        initiative_id=initiative_id,
+        gate=fresh,
+        user_id=user_id,
+    )
+
+
+def on_work_gate_reached(
+    *,
+    tenant_id: str,
+    initiative_id: str,
+    reached_item_id: str,
+    user_id: Optional[str] = None,
+) -> dict[str, Any]:
+    from services.maturity_practice import list_practices_for_stage, update_recurring_element
+    from services.roadmap import get_roadmap_item, list_dependencies_for_initiative, list_roadmap_items_for_initiative
+
+    reached = get_roadmap_item(tenant_id=tenant_id, item_id=reached_item_id)
+    if not reached or not is_work_gate(reached):
+        return {"reached_gate_id": reached_item_id}
+
+    for practice in list_practices_for_stage(
+        tenant_id=tenant_id,
+        initiative_id=initiative_id,
+        stage_id=reached_item_id,
+    ):
+        if practice.get("status") == "active":
+            update_recurring_element(
+                tenant_id=tenant_id,
+                recurring_id=practice["id"],
+                status="paused",
+                user_id=user_id,
+            )
+
+    dependencies = list_dependencies_for_initiative(
+        tenant_id=tenant_id, initiative_id=initiative_id
+    )
+    has_progression_deps = any(
+        (dep.get("dependency_type") or "requires") == "requires"
+        for dep in dependencies
+        if str(dep["from_item_id"]) in {
+            str(reached_item_id),
+            *(str(item["id"]) for item in list_roadmap_items_for_initiative(
+                tenant_id=tenant_id, initiative_id=initiative_id
+            ) if is_join_gate(item)),
+        }
+        or str(dep["to_item_id"]) == str(reached_item_id)
+    )
+
+    joined = try_switch_joins_for_gate(
+        tenant_id=tenant_id,
+        initiative_id=initiative_id,
+        gate_id=reached_item_id,
+        user_id=user_id,
+    )
+
+    activated_successors: list[dict[str, Any]] = []
+    if not joined:
+        item_by_id = {
+            str(item["id"]): item
+            for item in list_roadmap_items_for_initiative(
+                tenant_id=tenant_id, initiative_id=initiative_id
+            )
+        }
+        for successor_id in successor_work_gate_ids(reached_item_id, dependencies):
+            successor = item_by_id.get(successor_id)
+            if not successor or not is_work_gate(successor):
+                continue
+            if is_join_gate(successor):
+                continue
+            if successor.get("status") in TERMINAL_STATUSES:
+                continue
+            if not _graph_ready(
+                successor_id, item_by_id=item_by_id, dependencies=dependencies
+            ):
+                continue
+            activated_successors.append(
+                activate_work_gate(
+                    tenant_id=tenant_id,
+                    initiative_id=initiative_id,
+                    gate=successor,
+                    user_id=user_id,
+                )
+            )
+
+    legacy = None
+    if not joined and not activated_successors and not has_progression_deps:
+        legacy = _legacy_linear_next_stage(
+            tenant_id=tenant_id,
+            initiative_id=initiative_id,
+            reached_item_id=reached_item_id,
+            user_id=user_id,
+        )
+
+    return {
+        "reached_gate_id": reached_item_id,
+        "joins_switched": joined,
+        "successors_activated": activated_successors,
+        "legacy_linear": legacy,
+    }

backend/services/recurring.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from datetime import datetime
+from datetime import datetime, timezone
 from typing import Any, Literal, Optional
 
 from psycopg2.extras import RealDictCursor
@@ -16,14 +16,14 @@ RecurringStatus = Literal["active", "paused", "ended"]
 RECURRING_STATUSES = frozenset({"active", "paused", "ended"})
 
 _RECURRING_COLUMNS = """
-    id, tenant_id, initiative_id, roadmap_item_id, title, description, status,
+    id, tenant_id, initiative_id, roadmap_item_id, project_id, title, description, status,
     interval_days, next_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", "roadmap_item_id"):
+    for key in ("id", "tenant_id", "initiative_id", "roadmap_item_id", "project_id"):
         if result.get(key):
             result[key] = str(result[key])
     for ts_key in ("created_at", "updated_at", "next_due_at"):
@@ -47,6 +47,7 @@ def create_recurring_element(
     interval_days: Optional[int] = None,
     next_due_at: Optional[datetime] = None,
     roadmap_item_id: Optional[str] = None,
+    project_id: Optional[str] = None,
     user_id: Optional[str] = None,
 ) -> dict[str, Any]:
     title = title.strip()
@@ -64,16 +65,17 @@ def create_recurring_element(
             cur.execute(
                 f"""
                 INSERT INTO recurring_elements (
-                    tenant_id, initiative_id, roadmap_item_id, title, description, status,
+                    tenant_id, initiative_id, roadmap_item_id, project_id, title, description, status,
                     interval_days, next_due_at
                 )
-                VALUES (%s, %s, %s, %s, %s, %s, %s, %s)
+                VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s)
                 RETURNING {_RECURRING_COLUMNS}
                 """,
                 (
                     tenant_id,
                     initiative_id,
                     roadmap_item_id,
+                    project_id,
                     title,
                     description,
                     status,
@@ -166,6 +168,8 @@ def update_recurring_element(
     clear_next_due_at: bool = False,
     roadmap_item_id: Optional[str] = None,
     clear_roadmap_item_id: bool = False,
+    project_id: Optional[str] = None,
+    clear_project_id: bool = False,
 ) -> Optional[dict[str, Any]]:
     existing = get_recurring_element(tenant_id=tenant_id, recurring_id=recurring_id)
     if not existing:
@@ -205,6 +209,11 @@ def update_recurring_element(
     elif roadmap_item_id is not None:
         updates.append("roadmap_item_id = %s")
         params.append(roadmap_item_id)
+    if clear_project_id:
+        updates.append("project_id = NULL")
+    elif project_id is not None:
+        updates.append("project_id = %s")
+        params.append(project_id)
 
     if not updates:
         return existing

backend/services/roadmap.py

@@ -13,14 +13,14 @@ from services.audit import log_audit
 from services.initiatives import get_initiative
 from services.roadmap_criteria import create_default_criterion, prepare_criteria_for_verify
 
-RoadmapItemType = Literal["milestone", "review_gate", "maturity_stage", "work_cycle"]
+RoadmapItemType = Literal["milestone", "review_gate", "maturity_stage", "work_cycle", "join_gate"]
 RoadmapItemStatus = Literal[
     "planned", "active", "at_risk", "reached", "moved", "discarded"
 ]
 SequencingMode = Literal["sequential", "parallel", "optional"]
 DependencyType = Literal["requires", "blocks", "related", "parallel_group", "optional_branch"]
 
-ROADMAP_ITEM_TYPES = frozenset({"milestone", "review_gate", "maturity_stage", "work_cycle"})
+ROADMAP_ITEM_TYPES = frozenset({"milestone", "review_gate", "maturity_stage", "work_cycle", "join_gate"})
 ROADMAP_ITEM_STATUSES = frozenset(
     {"planned", "active", "at_risk", "reached", "moved", "discarded"}
 )
@@ -32,7 +32,7 @@ TERMINAL_STATUSES = frozenset({"reached", "moved", "discarded"})
 
 def _serialize_row(row: dict[str, Any]) -> dict[str, Any]:
     result = dict(row)
-    for key in ("id", "tenant_id", "roadmap_id", "initiative_id", "from_item_id", "to_item_id"):
+    for key in ("id", "tenant_id", "roadmap_id", "initiative_id", "from_item_id", "to_item_id", "strand_project_id"):
         if result.get(key):
             result[key] = str(result[key])
     if result.get("target_date"):
@@ -185,6 +185,7 @@ def list_roadmap_items_for_initiative(
                     ri.id, ri.tenant_id, ri.roadmap_id, r.initiative_id,
                     ri.item_type, ri.title, ri.goal_description, ri.definition_of_done,
                     ri.status, ri.sequencing_mode, ri.target_date, ri.sort_order,
+                    ri.strand_project_id,
                     ri.created_at, ri.updated_at
                 FROM roadmap_items ri
                 JOIN roadmaps r ON r.id = ri.roadmap_id AND r.tenant_id = ri.tenant_id
@@ -208,6 +209,7 @@ def get_roadmap_item(*, tenant_id: str, item_id: str) -> Optional[dict[str, Any]
                     ri.id, ri.tenant_id, ri.roadmap_id, r.initiative_id,
                     ri.item_type, ri.title, ri.goal_description, ri.definition_of_done,
                     ri.status, ri.sequencing_mode, ri.target_date, ri.sort_order,
+                    ri.strand_project_id,
                     ri.created_at, ri.updated_at
                 FROM roadmap_items ri
                 JOIN roadmaps r ON r.id = ri.roadmap_id AND r.tenant_id = ri.tenant_id
@@ -233,6 +235,7 @@ def create_roadmap_item(
     sequencing_mode: SequencingMode = "sequential",
     target_date: Optional[date] = None,
     sort_order: int = 0,
+    strand_project_id: Optional[str] = None,
     initial_criterion_title: Optional[str] = None,
     user_id: Optional[str] = None,
 ) -> dict[str, Any]:
@@ -255,12 +258,13 @@ def create_roadmap_item(
                 """
                 INSERT INTO roadmap_items (
                     tenant_id, roadmap_id, item_type, title, goal_description,
-                    definition_of_done, status, sequencing_mode, target_date, sort_order
+                    definition_of_done, status, sequencing_mode, target_date, sort_order,
+                    strand_project_id
                 )
-                VALUES (%s, %s, %s, %s, %s, %s::jsonb, %s, %s, %s, %s)
+                VALUES (%s, %s, %s, %s, %s, %s::jsonb, %s, %s, %s, %s, %s)
                 RETURNING id, tenant_id, roadmap_id, item_type, title, goal_description,
                           definition_of_done, status, sequencing_mode, target_date,
-                          sort_order, created_at, updated_at
+                          sort_order, strand_project_id, created_at, updated_at
                 """,
                 (
                     tenant_id,
@@ -273,11 +277,12 @@ def create_roadmap_item(
                     sequencing_mode,
                     target_date,
                     sort_order,
+                    strand_project_id,
                 ),
             )
             row = _serialize_row(dict(cur.fetchone()))
             row["initiative_id"] = initiative_id
-            if item_type != "work_cycle":
+            if item_type not in ("work_cycle", "join_gate"):
                 create_default_criterion(
                     cur,
                     tenant_id=tenant_id,
@@ -324,6 +329,8 @@ def update_roadmap_item(
     target_date: Optional[date] = None,
     clear_target_date: bool = False,
     sort_order: Optional[int] = None,
+    strand_project_id: Optional[str] = None,
+    clear_strand_project: bool = False,
 ) -> Optional[dict[str, Any]]:
     existing = get_roadmap_item(tenant_id=tenant_id, item_id=item_id)
     if not existing:
@@ -373,6 +380,11 @@ def update_roadmap_item(
     if sort_order is not None:
         updates.append("sort_order = %s")
         params.append(sort_order)
+    if clear_strand_project:
+        updates.append("strand_project_id = NULL")
+    elif strand_project_id is not None:
+        updates.append("strand_project_id = %s")
+        params.append(strand_project_id)
 
     if not updates:
         return existing
@@ -383,14 +395,22 @@ def update_roadmap_item(
     conn = get_connection()
     try:
         with conn.cursor(cursor_factory=RealDictCursor) as cur:
-            if status == "active" and existing.get("item_type") == "maturity_stage":
-                from services.maturity_practice import enforce_single_active_maturity_stage
+            if (
+                status == "active"
+                and existing.get("item_type") == "maturity_stage"
+            ):
+                from services.progression_graph import (
+                    enforce_single_active_work_gate_per_strand,
+                )
 
-                enforce_single_active_maturity_stage(
+                enforce_single_active_work_gate_per_strand(
                     cur,
                     tenant_id=tenant_id,
                     initiative_id=str(existing["initiative_id"]),
                     keep_active_id=item_id,
+                    strand_project_id=strand_project_id
+                    if strand_project_id is not None
+                    else existing.get("strand_project_id"),
                 )
             cur.execute(
                 f"""
@@ -399,7 +419,7 @@ def update_roadmap_item(
                 WHERE id = %s AND tenant_id = %s
                 RETURNING id, tenant_id, roadmap_id, item_type, title, goal_description,
                           definition_of_done, status, sequencing_mode, target_date,
-                          sort_order, created_at, updated_at
+                          sort_order, strand_project_id, created_at, updated_at
                 """,
                 params,
             )
@@ -652,6 +672,10 @@ def verify_reached(
         raise ValueError("RoadmapItem nicht gefunden")
     if item["status"] in TERMINAL_STATUSES:
         raise ValueError(f"RoadmapItem bereits terminal: {item['status']}")
+    if item.get("item_type") == "join_gate":
+        raise ValueError(
+            "Join-Knoten schaltet automatisch, wenn alle Eingänge erreicht sind — kein manuelles Verify"
+        )
 
     initiative_id = item["initiative_id"]
     conn = get_connection()
@@ -694,7 +718,7 @@ def verify_reached(
                 WHERE id = %s AND tenant_id = %s
                 RETURNING id, tenant_id, roadmap_id, item_type, title, goal_description,
                           definition_of_done, status, sequencing_mode, target_date,
-                          sort_order, created_at, updated_at
+                          sort_order, strand_project_id, created_at, updated_at
                 """,
                 (item_id, tenant_id),
             )
@@ -718,9 +742,9 @@ def verify_reached(
         details={"roadmap_item_id": item_id, "verify_reason": verify_reason},
     )
     if row.get("item_type") == "maturity_stage":
-        from services.maturity_stage_transition import on_maturity_stage_reached
+        from services.progression_graph import on_work_gate_reached
 
-        transition = on_maturity_stage_reached(
+        transition = on_work_gate_reached(
             tenant_id=tenant_id,
             initiative_id=initiative_id,
             reached_item_id=item_id,
@@ -770,13 +794,16 @@ def reopen_roadmap_item(
     try:
         with conn.cursor(cursor_factory=RealDictCursor) as cur:
             if item.get("item_type") == "maturity_stage":
-                from services.maturity_practice import enforce_single_active_maturity_stage
+                from services.progression_graph import (
+                    enforce_single_active_work_gate_per_strand,
+                )
 
-                enforce_single_active_maturity_stage(
+                enforce_single_active_work_gate_per_strand(
                     cur,
                     tenant_id=tenant_id,
                     initiative_id=str(item["initiative_id"]),
                     keep_active_id=item_id,
+                    strand_project_id=item.get("strand_project_id"),
                 )
             cur.execute(
                 """
@@ -785,7 +812,7 @@ def reopen_roadmap_item(
                 WHERE id = %s AND tenant_id = %s
                 RETURNING id, tenant_id, roadmap_id, item_type, title, goal_description,
                           definition_of_done, status, sequencing_mode, target_date,
-                          sort_order, created_at, updated_at
+                          sort_order, strand_project_id, created_at, updated_at
                 """,
                 (item_id, tenant_id),
             )

backend/services/roadmap_criteria.py

@@ -74,13 +74,14 @@ def _reopen_item_if_reached(
     if item["status"] != "reached":
         return
     if item.get("item_type") == "maturity_stage":
-        from services.maturity_practice import enforce_single_active_maturity_stage
+        from services.progression_graph import enforce_single_active_work_gate_per_strand
 
-        enforce_single_active_maturity_stage(
+        enforce_single_active_work_gate_per_strand(
             cur,
             tenant_id=tenant_id,
             initiative_id=str(item["initiative_id"]),
             keep_active_id=item["id"],
+            strand_project_id=item.get("strand_project_id"),
         )
     cur.execute(
         """

backend/steering/strategies/next_action/maturity_progression.py

@@ -7,7 +7,6 @@ from typing import Any
 from steering.signals import default_rules
 from steering.strategies.next_action.default_strategy import DefaultNextActionStrategy
 from steering.strategies.next_action.execution_ready import (
-    first_active_gate_id,
     list_execution_ready_candidates,
     merge_candidates,
 )
@@ -43,7 +42,12 @@ class MaturityProgressionStrategy:
         recurring = recurring_due_candidates(ctx, initiative_id, limit=limit)
 
         remaining = limit - len(recurring)
-        gate_scope = first_active_gate_id(ctx, initiative_id)
+        from services.progression_graph import list_active_work_gates
+
+        active_gates = list_active_work_gates(
+            tenant_id=ctx.tenant_id, initiative_id=initiative_id
+        )
+        gate_scope = active_gates[0]["id"] if len(active_gates) == 1 else None
         ready: list[dict[str, Any]] = []
         if remaining > 0:
             ready = list_execution_ready_candidates(

backend/tests/test_a1_progression_join.py

@@ -0,0 +1,111 @@
+"""AP-A1-PM — progression join graph tests."""
+
+from __future__ import annotations
+
+from tests.factories import provision_user_in_tenant
+from tests.test_initiatives_actions import _auth, _create_initiative, _login
+
+
+def test_progression_join_switches_and_activates_outputs(client):
+    user = provision_user_in_tenant(tenant_role="admin")
+    token = _login(client, user)
+
+    created = _create_initiative(
+        client,
+        token,
+        title="Mawashi Progression",
+        archetype_key="initiative.maturity_journey",
+    )
+    initiative_id = created.json()["id"]
+
+    from services.archetype_starter_kit import apply_a1_progression_demo
+
+    demo = apply_a1_progression_demo(
+        tenant_id=user["tenant_id"],
+        initiative_id=initiative_id,
+        user_id=user["id"],
+    )
+    assert demo["applied"] is True
+
+    progression = client.get(
+        f"/api/initiatives/{initiative_id}/roadmap/progression-state",
+        headers=_auth(token),
+    )
+    assert progression.status_code == 200
+    body = progression.json()
+    assert len(body["active_work_gates"]) == 2
+    assert len(body["joins"]) == 1
+    assert body["joins"][0]["pending_inputs"]
+
+    items = client.get(
+        f"/api/initiatives/{initiative_id}/roadmap/items",
+        headers=_auth(token),
+    ).json()
+    by_title = {item["title"]: item for item in items}
+    d1 = by_title["Dehnung — Einstieg"]
+    h1 = by_title["Hüftrotation — Einstieg"]
+    join = by_title["Mawashi Geri zur Hüfte"]
+
+    for gate in (d1, h1):
+        client.post(
+            f"/api/initiatives/{initiative_id}/evidence",
+            json={
+                "title": f"Nachweis {gate['title']}",
+                "roadmap_item_id": gate["id"],
+                "status": "accepted",
+            },
+            headers=_auth(token),
+        )
+        verify = client.post(
+            f"/api/roadmap-items/{gate['id']}/verify-reached",
+            headers=_auth(token),
+        )
+        assert verify.status_code == 200
+
+    items_after = client.get(
+        f"/api/initiatives/{initiative_id}/roadmap/items",
+        headers=_auth(token),
+    ).json()
+    by_title_after = {item["title"]: item for item in items_after}
+    assert by_title_after[join["title"]]["status"] == "reached"
+    assert by_title_after["Dehnung — nach Join"]["status"] == "active"
+    assert by_title_after["Hüftrotation — nach Join"]["status"] == "active"
+
+    recurring = client.get(
+        f"/api/initiatives/{initiative_id}/recurring",
+        headers=_auth(token),
+    ).json()
+    active_titles = {r["title"] for r in recurring if r["status"] == "active"}
+    assert "Enddehnung Mawashi-Vorbereitung" in active_titles
+    assert "Explosive Hüftrotation" in active_titles
+
+
+def test_multi_active_work_gates_both_in_next_actions(client):
+    user = provision_user_in_tenant(tenant_role="admin")
+    token = _login(client, user)
+
+    created = _create_initiative(
+        client,
+        token,
+        title="Multi Active",
+        archetype_key="initiative.maturity_journey",
+    )
+    initiative_id = created.json()["id"]
+
+    from services.archetype_starter_kit import apply_a1_progression_demo
+
+    apply_a1_progression_demo(
+        tenant_id=user["tenant_id"],
+        initiative_id=initiative_id,
+        user_id=user["id"],
+    )
+
+    snap = client.get(
+        f"/api/initiatives/{initiative_id}/steering-snapshot",
+        headers=_auth(token),
+    )
+    assert snap.status_code == 200
+    recurring_items = [
+        a for a in snap.json().get("next_actions") or [] if a.get("kind") == "recurring_due"
+    ]
+    assert len(recurring_items) >= 2

backend/tests/test_ap20e_maturity_transition.py

@@ -44,7 +44,10 @@ def test_maturity_stage_reached_rotates_recurring(client):
     assert verify.status_code == 200
     body = verify.json()
     assert body["status"] == "reached"
-    assert body.get("maturity_transition", {}).get("new_recurring_id")
+    transition = body.get("maturity_transition") or {}
+    legacy = transition.get("legacy_linear") or {}
+    practice_ids = (legacy.get("practice_transition") or {}).get("practice_ids") or []
+    assert practice_ids or transition.get("successors_activated") or transition.get("joins_switched")
 
     recurring = client.get(
         f"/api/initiatives/{initiative_id}/recurring",

docs/architecture/methods/README.md

@@ -2,14 +2,14 @@
 
 **Prozess:** `../M1_Hybrid_Path_and_Depth_D_v0.1.md`  
 **Methodenkern (Freeze):** [`../Kairo_Steering_Method_Kernel_v0.1.md`](../Kairo_Steering_Method_Kernel_v0.1.md) — Methodentypen: Kernel §6  
-**PO 2026-07-26:** Architektur beibehalten; Spec-D-Batch **vorläufig freigegeben** (Implementierungsausreichendheit noch offen)
+**PO 2026-07-28:** Spec-D `maturity_progression` — **Horizon/Progression PO-Lock** in [`SPEC_A1_Progression_Model_PO_Lock_v0.1.md`](../../product/archetypes/SPEC_A1_Progression_Model_PO_Lock_v0.1.md); Spec-D D3/D6/D8 angepasst.
 
 | Methode | Typ | Datei | Status |
 |---------|-----|-------|--------|
 | `sequential_dependency` | Primary (Ausführung) | SPEC_D_sequential_dependency_v0.1.md | vorläufig freigegeben|
 | `continuous_product` | Primary (Ausführung) | SPEC_D_continuous_product_v0.1.md | vorläufig freigegeben|
 | `recurring_control` | Primary (Ausführung) | SPEC_D_recurring_control_v0.1.md | vorläufig freigegeben|
-| `maturity_progression` | Primary (Ausführung) | SPEC_D_maturity_progression_v0.1.md | vorläufig freigegeben|
+| `maturity_progression` | Primary (Ausführung) | SPEC_D_maturity_progression_v0.1.md | PO-Lock Horizon (2026-07-28) |
 | `checklist_flow` | Primary (Ausführung) | SPEC_D_checklist_flow_v0.1.md | vorläufig freigegeben|
 | `care_navigation` | Primary (Ausführung) | SPEC_D_care_navigation_v0.1.md | vorläufig freigegeben|
 | `dispute_procedure` | Primary (Ausführung) | SPEC_D_dispute_procedure_v0.1.md | vorläufig freigegeben|

docs/architecture/methods/SPEC_D_maturity_progression_v0.1.md

@@ -2,7 +2,7 @@
 ## Steuerungsmethode — Spec-Tiefe D v0.1
 
 **Status:** vorläufig freigegeben (PO 2026-07-26) — mit zugehöriger Archetyp-Vollspec; Implementierungsausreichendheit noch offen
-**Stand:** 2026-07-26  
+**Stand:** 2026-07-28 (PO-Lock Progressionsmodell — [`SPEC_A1_Progression_Model_PO_Lock_v0.1.md`](../../product/archetypes/SPEC_A1_Progression_Model_PO_Lock_v0.1.md))  
 **Default für:** A1 `initiative.maturity_journey`  
 **Prozess:** `M1_Hybrid_Path_and_Depth_D_v0.1.md`  
 **Quellen:** Decision-Lock A1, Archetyp-Vollspec A1, Kernel Freeze, AP2.0e  
@@ -17,7 +17,7 @@
 | `method_key` | `maturity_progression` |
 | Rolle | primary (**Ausführung** — Kernel §6) |
 | Label (DE) | Reifegrad-Progression |
-| Zweck | Fähigkeit über Stufen steuern: Active Stage als Horizont; Next = fällige/alternierende Übung oder Stage-Action; bei Stage `reached` Activity Set wechseln. Weiches Vorhaben-Ende. |
+| Zweck | Fähigkeit über **parallele Strang-Pfade** (Gate-Graph) steuern; Next = fällige Übungen auf **aktiven Gates**; bei Gate `reached` strangspezifischer Activity-Set-Wechsel. Weiches Vorhaben-Ende. |
 
 ---
 
@@ -34,20 +34,26 @@
 
 ## D3 Horizon
 
+**PO-Lock (2026-07-28):** [`SPEC_A1_Progression_Model_PO_Lock_v0.1.md`](../../product/archetypes/SPEC_A1_Progression_Model_PO_Lock_v0.1.md) §3 — ersetzt „eine aktive Stufe initiative-weit“ für Multi-Strang.
+
 | Horizont | Bedeutung |
 |----------|-----------|
-| **Aktive `maturity_stage`** | fokussierte Stufe; nur deren Stage Activity Set liefert Next |
-| Plan-Nebenblick | nächste Stufe / Graph-Voraussetzungen — nicht Leading für Next |
-| Ist | CadenceInstances + Stage-Actions der aktiven Stufe |
+| **Aktive Gates (Menge)** | Alle `maturity_stage`/Gate-Knoten mit Status `active`, die graph-ready sind; **mehrere parallel** (je Strang max. ein aktives Gate auf dem Pfad) |
+| **Strang** | `Project` — paralleler Fähigkeits-Pfad; Übungen mit `project_id` |
+| **Join-Gate** | wird `active`, wenn alle `requires`-Vorgänger `reached` |
+| Plan-Nebenblick | blockierte / geplante Gates — nicht Leading für Next |
+| Ist | CadenceInstances + Stage-Actions der **aktiven Gates** |
 
-Keine Next-Kandidaten aus inaktiven Stufen.
+Keine Next-Kandidaten aus Gates, die nicht `active`/graph-ready sind.
+
+**Lineares Demo-Kit (1 Strang, Stufe 1–3):** Teilmenge mit effektiv einem aktiven Gate — kein PO-Kernbild.
 
 ---
 
 ## D4 Leading Work Item
 
-**Primär:** `CadenceInstance` (Übung/Ritual am RecurringElement der aktiven Stufe).  
-**Sekundär:** `Action` (Stage-gebunden: Prüfung, Workshop, Nachweis).  
+**Primär:** `CadenceInstance` (Übung am `RecurringElement` eines **aktiven Gates**, optional Strang via `project_id`).  
+**Sekundär:** `Action` (Gate-gebunden: Prüfung, Workshop — selten bei A1).  
 **Hinweis-Objekt (kein Leading Work):** offenes Stufen-Kriterium / Verify-Fortschritt — erscheint in Next/Attention als Steuerhinweis.
 
 Pro Recurring: genau **eine** offene Instanz (kein Duplikat bei Verpassen).
@@ -77,12 +83,13 @@ Kernel-Schlitznamen: Abbildung auf §4 Kernel (Intake … Closure).
 
 ## D6 Next Action — konkrete Regeln
 
-### Ready-Menge (aktive Stufe)
+### Ready-Menge (aktive Gates)
 
 Ein Work Item ist ready, wenn:
 
-1. gebunden an die **aktive** `maturity_stage` und Aktivität **aktiv**, und  
-2. eines von:
+1. gebunden an ein **aktives**, graph-ready **Gate** und Aktivität **aktiv**, und  
+2. (Multi-Strang) `project_id` passt zum Strang des Gates, und  
+3. eines von:
    - **Cadence ohne Alternanz:** Instanz fällig oder überfällig (heute laut Cadence / overdue), oder  
    - **Cadence in Alternanz-Gruppe:** Instanz ist das **aktuelle** Gruppenmitglied **und** fällig/überfällig (bzw. „dran“ laut Gruppenpolicy, wenn Cadence der Gruppe geteilt ist), oder  
    - **Stage-Action:** Status offen und Deps/Blocker erlauben Arbeit  
@@ -141,7 +148,7 @@ Unabhängige Cadences am gleichen Stage → mehrere ready am selben Tag möglich
 | practice done / Cadence erfüllt | Instanz schließen; nächste Instanz laut Cadence; bei Alternanz Rotation |
 | Stage-Action done | aus Ready; ggf. Kriterien-Fortschritt |
 | Evidence / Kriterium erfüllt | Validation-Fortschritt |
-| stage `reached` (Verify ok) | altes Activity Set deaktivieren; nächste Stufe aktiv; neues Set aktiv (AP2.0e erweitert) |
+| stage `reached` (Verify ok) | Activity Set **dieses Gates** deaktivieren; **pro Strang** nächstes Gate / neues Set (Join: strangspezifisch) |
 | manuelle Adaptation (Set/Cadence/Alternanz) | Ready-Menge neu; auditiert |
 | Cadence-Zeitpunkt erreicht | Event-Schub → Ready neu bewerten |
 
@@ -175,7 +182,7 @@ Felder `alternation_group_id`, `alternation_order`: Archetyp-Vollspec A1 §10.
 |-----|------|
 | next_work_strategy | `maturity_progression` |
 | attention_rules | Codes D7 |
-| horizon_resolver | aktive `maturity_stage` |
+| horizon_resolver | Menge aktiver, graph-ready Gates (Multi-Strang) |
 | dod_policy | Stage-Kriterien / Verify |
 | adaptation_hooks | `on_stage_reached` → Set-Wechsel; manuelle Set-Änderung |
 | steering_elements | `next_action_primary`, `maturity_stage`, `recurring_rhythm` |
@@ -191,6 +198,7 @@ Felder `alternation_group_id`, `alternation_order`: Archetyp-Vollspec A1 §10.
 | Hybrid Dominanz | Cadence-Event + Stage-Plan — Kernel trägt Dual-Auslöser |
 | Leading polymorph | Cadence + Action — Kernel Q2 |
 | Alternanz-State | Persistenz am Group-/Recurring-Kontext — Implementierungsdetail, fachlich hier verbindlich |
-| Multi-Fähigkeit | mehrere Projects ok; kein Abnahme-Zwang für Kern-Kit |
+| Multi-Fähigkeit | mehrere Projects / Stränge — **Kernbild A1** (PO-Lock); Gate-Graph verbindet Pfade |
+| Single-active initiative-wide | **widerrufen** für Multi-Strang — nur Demo-Kit |
 
 **PO-Empfehlung:** A1-Vollspec §4 OM + diese Spec-D = Steuervertrag; UI nur in Archetyp-Vollspec.

docs/product/archetypes/README.md

@@ -7,12 +7,12 @@
 **UI-Navigation (Archetyp):** [`ARCHETYPE_UI_NAVIGATION_v0.1.md`](ARCHETYPE_UI_NAVIGATION_v0.1.md)  
 **Backlog / Epic / Dual Commit:** [`../../architecture/ADP_Backlog_Hierarchy_and_Dual_Commit_Path_v0.1.md`](../../architecture/ADP_Backlog_Hierarchy_and_Dual_Commit_Path_v0.1.md)
 
-**PO 2026-07-26:** Specs **vorläufig freigegeben** — Implementierungsausreichendheit noch nicht abschließend bewertet.
+**PO 2026-07-28:** A1 **PO-Lock Progressionsmodell** — [`SPEC_A1_Progression_Model_PO_Lock_v0.1.md`](SPEC_A1_Progression_Model_PO_Lock_v0.1.md) (Option C nach Validation No-Go).
 
 | ID | Datei | Status |
 |----|-------|--------|
 | C1 | [SPEC_C1_dispute_case_v0.1.md](SPEC_C1_dispute_case_v0.1.md) | vorläufig freigegeben |
-| A1 | [SPEC_A1_maturity_journey_v0.1.md](SPEC_A1_maturity_journey_v0.1.md) | vorläufig freigegeben |
+| A1 | [SPEC_A1_maturity_journey_v0.1.md](SPEC_A1_maturity_journey_v0.1.md) | PO-Lock Progression (2026-07-28) |
 | A2 | [SPEC_A2_linear_project_v0.1.md](SPEC_A2_linear_project_v0.1.md) | vorläufig freigegeben |
 | A3 | [SPEC_A3_recurring_program_v0.1.md](SPEC_A3_recurring_program_v0.1.md) | vorläufig freigegeben |
 | B1 | [SPEC_B1_checklists_v0.1.md](SPEC_B1_checklists_v0.1.md) | vorläufig freigegeben |

docs/product/archetypes/SPEC_A1_Progression_Model_PO_Lock_v0.1.md

@@ -0,0 +1,220 @@
+# A1 — Progressionsmodell PO-Lock
+## v0.1 (Option C, AP2.1)
+
+**Status:** **PO-lock** (2026-07-28) — präzisiert Spec A1 §4 und Spec-D D3/D6 vor Implementierung  
+**Auslöser:** AP2.1 PO-Validation — flache Rhythmus-Liste deckt Nutzerbild nicht ab  
+**Bezug:** `SPEC_A1_maturity_journey_v0.1.md`, `SPEC_D_maturity_progression_v0.1.md`
+
+---
+
+## 1. PO-Kernentscheidung
+
+A1 ist **kein lineares Stufenmodell mit losem „Wiederkehrend“**, sondern ein **Progressionsmodell über parallele Stränge (Pfade)** mit **Gate-Graph**, **Activity Sets pro Gate** und **wiederkehrenden Übungen als Ist-Tracking**.
+
+| PO-These | Lock |
+|----------|------|
+| Primär ist **Üben / Wiederholung**, nicht committete Einmal-APs | ✓ Spec-D D4 unverändert |
+| Komplexität liegt in **Planung + Durchführung paralleler Progressionen** | ✓ ab jetzt explizit |
+| **Rhythmus** ist Eigenschaft der **Übung** (`RecurringElement`), kein losgelöstes Planungsobjekt | ✓ |
+| **Strang** = `Project` (`container_kind=stream`); **Work-Gate** = `maturity_stage` mit Activity Set | ✓ |
+| **Join** = Schaltknoten — kein Activity Set; konsolidierter Status; multi-in / multi-out | ✓ (§10) |
+| **Kein Terminalgate-Typ** — letztes Gate vor Join ist normales Gate; Kante genügt | ✓ (§10) |
+
+---
+
+## 2. Referenzbeispiel (PO) — Mawashi Geri
+
+**Vorhaben:** Fähigkeit „Mawashi Geri zum Kopf treffen“.
+
+**Stränge (Projects):**
+
+| Strang | Beispiel-Gates (Pfad) |
+|--------|------------------------|
+| Dehnung | D1 → D2 |
+| Hüftrotation | H1 → H2 |
+| Technik | T1 → T2 |
+
+**Join (Schaltknoten):** „Mawashi Geri zur Hüfte“ — **keine Übungen**; Eingänge von D2, H2, T2; Ausgänge z. B. zu D3, G1 (Gleichgewicht). Konsolidierter Status **liegt am Join**, nicht an D2/H2/T2.
+
+**Nach Schalten (MVP):** alle Ausgänge feuern → Nachfolge-Gates je Strang `active` → Activity Sets frei.
+
+**Leitfrage:** *Welche Übungen sind heute auf aktiven Strang-Gates fällig — und welche Joins warten noch auf welche Eingänge?*
+
+---
+
+## 3. Horizon — Ersetzt „eine aktive Stufe initiative-weit“
+
+### 3.1 Alt (v0.1, zu eng)
+
+> Genau **eine** `maturity_stage` mit Status `active` pro Initiative.
+
+Gilt **nicht mehr** für Multi-Strang-Progression (nur noch für lineares Demo-Kit „Spagat 1–2–3“).
+
+### 3.2 Neu (PO-lock)
+
+| Regel | Bedeutung |
+|-------|-----------|
+| **H1 — Parallele aktive Gates** | Initiative-weit **mehrere** Gates dürfen `active` sein — je Strang höchstens **ein** aktives Gate auf dem linearen Pfadfortschritt |
+| **H2 — Strang** | `Project` mit Archetyp-Spiegel `project.maturity_journey`; optional `roadmap_item_id` am Gate für Zuordnung |
+| **H3 — Join (Schaltknoten)** | Join **nie** in Today/Next; Status am Join = welche **Eingänge** noch nicht `reached`; Schaltbedingung = alle Eingänge erfüllt |
+| **H4 — Ready / Next** | Ready-Menge = Activity Sets aller **aktiven Work-Gates** (`maturity_stage`); Joins ausgeschlossen |
+| **H5 — Inaktive Pfade** | Gates `planned` / blockiert durch Graph → deren Übungen **nicht** in Next/Today |
+
+**Horizon-Resolver (Ziel):** Menge `{ work_gate_id | status=active ∧ graph_ready ∧ hat Activity Set }` — Join-Knoten nie enthalten.
+
+---
+
+## 4. Activity Set — Bindung Übung ↔ Pfad
+
+### 4.1 Was eine „Übung“ ist
+
+| Begriff UI | OM-Entität | Pflicht-Bindung |
+|------------|------------|-----------------|
+| Übung / Ritual | `RecurringElement` | `roadmap_item_id` → Gate |
+| Strang | `project_id` → Project (Strang) | **ja**, wenn ≥2 Stränge |
+| Rhythmus | `interval_days`, Alternanz-Felder | am Recurring |
+| Heute erledigt | `CadenceInstance` | pro Recurring |
+
+**Anti-Pattern (PO):** flache Liste „Wiederkehrend“ ohne Gate- und Strang-Bezug.
+
+### 4.2 Einmal-Aktivitäten
+
+`Action` nur **sekundär** (Prüfung, Workshop, Nachweis) — an Gate + optional Strang. Nicht Träger täglicher Übung.
+
+### 4.3 Messbarkeit
+
+| Ebene | Mechanismus |
+|-------|-------------|
+| Ist (Tages-) | `CadenceInstance.measurement_note` |
+| Plan (Gate) | `RoadmapItemCriterion` mit `criterion_kind: metric` |
+| Verify | Evidence + Kriterien vor `reached` |
+
+---
+
+## 5. Verify, Schalten, Set-Wechsel
+
+### 5.1 Work-Gate (mit Activity Set)
+
+Bei `reached` eines Work-Gates **G**:
+
+1. Activity Set von **G** deaktivieren.  
+2. Hat **G** einen **Join** als direkten Nachfolger (Kante G → Join): **kein** auto-next auf dem Strang — Beitrag zum Join ist erfüllt; Strang pausiert bis Join schaltet.  
+3. Hat **G** ein **Work-Nachfolge-Gate** auf demselben Strang: dieses → `active` (wenn unblocked).  
+4. Audit + Journey-Event.
+
+### 5.2 Join (Schaltknoten, §10)
+
+Bei **Schaltbedingung erfüllt** (alle Eingänge `reached`):
+
+1. Join-Status → `reached` (automatisch oder explizites „Schalten“ — **kein** Verify über Übungs-Kriterien).  
+2. **MVP:** **alle** Ausgangs-Gates → `active` (sofern Work-Gates mit Activity Set).  
+3. Activity Sets der neu aktiven Gates freischalten.  
+4. Audit + Journey-Event („Join geschaltet: {Titel}“).
+
+**Stufe B:** selektives Schalten von Ausgängen (If/Else) — §10.4.
+
+**Nicht:** pauschal „nächste lineare Stufe 2“ initiative-weit (Demo-Kit-Ausnahme).
+
+---
+
+## 6. UI-Pflicht (Plan vor Today)
+
+| Fläche | Inhalt (PO) |
+|--------|-------------|
+| **Plan → Struktur** | Stränge + Graph; Joins als **Knoten** (Eingänge/Ausgänge sichtbar) |
+| **Plan → Gate-Detail** | Nur **Work-Gates**: Activity Set, Strang, Cadence, metric-Kriterien |
+| **Plan → Join-Detail** | Titel, Eingänge, Ausgänge, Schaltstatus — **kein** Activity Set |
+| **Ausführen → Today** | fällige Übungen nur von **aktiven Work-Gates** |
+| **Kontrolle** | Join-Warteliste: *„{Join-Titel} wartet auf: Dehnung/D2, …“* |
+| **Journey** | Set-Wechsel, Verify, Messwerte |
+
+**Nicht** als Haupt-IA: generisches „Wiederkehrend“ ohne Plan-Kontext.
+
+---
+
+## 7. MVP-Stufe A — Abgrenzung nach PO-Lock
+
+| Ebene | Inhalt | Stufe A |
+|-------|--------|---------|
+| **Demo Minimum** | Lineares Kit (Spagat 3 Stufen, 1 Strang) | Validation **technisch** — nicht PO-Kernbild |
+| **PO-Kernbild** | ≥2 Stränge + Graph + Gate-Activity-Set + Today | **Voraussetzung** für A1 Go in MVP §4 |
+| **Reich** | Alternanz, Templates (Kumite, Mawashi) | Stufe B / Template-APs |
+
+**Konsequenz AP2.1:** A1 bleibt **No-Go** bis Progressions-IA (§6) mindestens für **2 Stränge + 1 Join** durchspielbar — nicht nur Cadence-Plumbing.
+
+---
+
+## 8. Implementierungsfolge (nach Lock, keine Spec-Neuerfindung)
+
+```text
+AP-A1-PM-1   Spec-D D3/D6/D8 + A1 §4 (dieses Lock) ✓
+AP-A1-PM-2   Persistenz: recurring.project_id; strand_project_id am Gate; gate-activity-set API
+AP-A1-PM-3   Horizon multi-active; Join-Resolver (§10); single-active revoke
+AP-A1-PM-3b  Join-Schalten: alle Ausgänge (MVP)
+AP-A1-PM-4   UI: Plan Struktur + Work-Gate-Detail + Join-Knoten
+AP-A1-PM-5   Today/Kontrolle: strang-gruppiert; Join-Warteliste
+AP-A1-PM-6   Template: 2 Stränge → 1 Join → 2+ Ausgänge
+```
+
+Kein ADP für OM-Grundmodell — Erweiterung innerhalb RoadmapItem + Project + Recurring + CadenceInstance.
+
+---
+
+## 9. Offene Feinentscheide ( später )
+
+| # | Thema | Default bis PO anders |
+|---|--------|------------------------|
+| 1 | Join als `item_type: join_gate` vs. `review_gate` + Flag | `join_gate` (neu, schlank) |
+| 2 | Max. aktive Work-Gates pro Strang | 1 |
+| 3 | Ranking zwischen Strängen | überfällig > heute > EFS später |
+| 4 | Join-Schalten automatisch vs. Bestätigung | automatisch wenn alle Eingänge `reached` |
+
+---
+
+## 10. Join als Schaltknoten (PO-Lock 2026-07-28)
+
+### 10.1 Warum kein Terminalgate
+
+Der Nutzer modelliert **normale Gates** auf Strang-Pfaden und **verbindet** deren letztes relevantes Gate per Kante mit einem **Join**. Ein extra Typ „Terminalgate“ ist **nicht nötig** und würde Graph-Logik sichtbar machen, die die Engine ohnehin aus Kanten ableitet.
+
+### 10.2 Join — Definition
+
+| Eigenschaft | Lock |
+|-------------|------|
+| **Rolle** | Konsolidierungs- und Schaltpunkt; **trägt den sichtbaren Meilenstein-Status** (z. B. „Mawashi Geri zur Hüfte“) |
+| **Activity Set** | **Keins** — keine `RecurringElement`, keine Tagesarbeit am Join |
+| **Eingänge** | Work-Gates aus ≥1 Strang (`requires`: Join wartet auf Gate) |
+| **Ausgänge** | Work-Gates auf Strang-Pfaden (`requires`: Nachfolger wartet auf Join) |
+| **Schaltbedingung (MVP)** | Alle Eingänge `reached` |
+| **Effekt (MVP)** | **Alle** Ausgänge schalten → Nachfolge-Gates `active` → deren Activity Sets frei |
+| **Horizon / Today** | Join erscheint **nicht** — nur in Kontrolle / Plan-Graph |
+
+### 10.3 Graph-Kanten (bestehende Engine)
+
+Semantik unverändert (`roadmap_engine`):
+
+```text
+Eingang:  join  requires  D2    (D2 muss reached sein, bevor Join schaltet)
+Eingang:  join  requires  H2
+Ausgang:  D3    requires  join   (D3 wird active, wenn Join reached)
+Ausgang:  G1    requires  join
+```
+
+Der Join **entscheidet**, auf welche Stränge/Gates noch gewartet wird: UI listet offene Eingänge am Join-Titel — nicht als leere Strang-Strecke.
+
+### 10.4 Stufe B — bedingte Ausgänge (If/Else)
+
+| Stufe | Verhalten |
+|-------|-----------|
+| **A (MVP)** | Alle Ausgänge feuern gemeinsam |
+| **B** | Pro Ausgang optional Bedingung (Kriterium, Metrik, manuelle Wahl); Engine schaltet nur erfüllte Ausgänge |
+
+Technische Andockpunkte vorhanden: `optional_branch`, später Kriterium an Kante — **nicht** Stufe A.
+
+### 10.5 Strang ohne Ausgang nach Join
+
+Hat ein Strang **keinen** Ausgangs-Gate am Join, endet sein Beitrag dort — **ohne** Dummy-Gates. Strang-Project kann `completed` / ruhend; Today bleibt leer für diesen Strang bis ggf. ein späterer Join einen neuen Ausgang öffnet.
+
+---
+
+*Bei Widerspruch zu A1 v0.1 / Spec-D v0.1 ohne PO-Lock-Vermerk gilt **dieses Dokument** für Progressions- und Horizon-Fragen.*

docs/product/archetypes/SPEC_A1_maturity_journey_v0.1.md

@@ -2,8 +2,8 @@
 ## Archetyp-Vollspec (implementierbar) v0.1
 
 **Status:** vorläufig freigegeben (PO 2026-07-26) — Zielbild; Implementierungsausreichendheit noch nicht abschließend bewertet
-**Stand:** 2026-07-26  
-**MVP-Stufe:** A  
+**Stand:** 2026-07-28 (PO-Lock Progressionsmodell — siehe §14)  
+**MVP-Stufe:** A (PO-Kernbild: Multi-Strang — §14.4)  
 **Decision-Lock:** A1 Reifegrad  
 **Default-Methode:** [`SPEC_D_maturity_progression_v0.1.md`](../../architecture/methods/SPEC_D_maturity_progression_v0.1.md)  
 **Methodenkern:** `Kairo_Steering_Method_Kernel_v0.1.md`  
@@ -52,7 +52,10 @@ Kontinuierliche Entwicklung einer Fähigkeit über **Phasen/Stufen**. Eine Phase
 6. Innerhalb Mittelstufe Übung hinzufügen (Adaptation), auditiert.  
 7. Optional zweites Fähigkeits-Project + Graph-Voraussetzung.
 
-**Leitfrage:** Welche Stufe ist aktiv — und welche Übung/Aktivität ist **jetzt** dran (inkl. Alternanz/Zeitversatz)?
+**Leitfrage:** Welche **Strang-Gates** sind aktiv — und welche Übung ist **jetzt** auf welchem Pfad dran (inkl. Alternanz/Zeitversatz)?
+
+**Referenzbeispiel (PO 2026-07-28) — parallele Progression „Mawashi Geri“:**  
+Mehrere Stränge (Projects: Dehnung, Hüftrotation, Technik), je Strang Gate-Kette im Graph, Join-Gate („sicher zur Hüfte“), Activity Set pro Gate, nach Join strangspezifischer Set-Wechsel. Vollständig: [`SPEC_A1_Progression_Model_PO_Lock_v0.1.md`](SPEC_A1_Progression_Model_PO_Lock_v0.1.md) §2.
 
 ---
 
@@ -67,25 +70,28 @@ evidence, decisions, reviews, steering_methods
 
 ## 4. Plan- / Ist-Vertrag
 
-### 4.1 Stufen / Phasen
+### 4.1 Stufen / Phasen / Stränge
 
 | Element | Rolle |
 |---------|--------|
-| `maturity_stage` (RoadmapItem) | Phase/Stufe; eine **aktive** Stufe (Horizon) |
-| Kriterien / Evidence | Verify vor `reached` |
-| Graph | Voraussetzungen zwischen Stufen und/oder Fähigkeits-Projects |
-| Project `project.maturity_journey` | Fähigkeit/Spur; eine oder mehrere |
+| `maturity_stage` (RoadmapItem) | Gate / Reifegrad-Checkpoint auf einem **Pfad** |
+| **Strang** | `Project` (`project.maturity_journey`) — z. B. Dehnung, Technik, Hüftrotation |
+| Kriterien / Evidence | Verify vor `reached`; inkl. `metric` |
+| Graph | Parallele Pfade, `requires`-Kanten, **Join-Gates** zwischen Strängen |
+| **Horizon (PO-lock)** | **Mehrere** aktive Gates initiative-weit; **pro Strang** höchstens ein aktives Gate auf dem Pfad — siehe [`SPEC_A1_Progression_Model_PO_Lock_v0.1.md`](SPEC_A1_Progression_Model_PO_Lock_v0.1.md) §3 |
+
+> **Hinweis:** Lineares Demo-Kit (Stufe 1–3, ein Strang) ist **Teilmenge**, nicht das PO-Kernbild.
 
 ### 4.2 Aktivitäts-Set einer Phase (verbindlich)
 
 | Aktivitätstyp | Persistenz | Rolle |
 |---------------|------------|--------|
-| Übung / Ritual | `RecurringElement`, gebunden an `maturity_stage` | wiederkehrend |
+| Übung / Ritual | `RecurringElement`, gebunden an **Gate** (`roadmap_item_id`) **und Strang** (`project_id` bei Multi-Strang) | wiederkehrend |
 | Einmal-/Sonderaktivität | `Action`, gebunden an Stufe | Prüfung, Workshop, Nachweis |
 
-- Pro Stufe: **beliebig viele** Aktivitäten; **≥1 reicht**.  
+- Pro **Gate**: beliebig viele Übungen; **≥1** pro aktivem Gate auf einem Strang.  
 - Pro Recurring: **eine** offene CadenceInstance (kein Duplikat bei Verpassen).  
-- Inaktive Stufen: kein Next, keine neuen Instanzen; Historie bleibt.
+- Inaktive / nicht-graph-ready Gates: kein Next, keine neuen Instanzen; Historie bleibt.
 
 ### 4.3 Zeitversatz und Alternanz (gleiche Phase)
 
@@ -97,29 +103,30 @@ evidence, decisions, reviews, steering_methods
 
 Alternanz-Regeln: Rotation nach Erfüllung; Overdue nur auf aktuelles Mitglied; Gruppe an Stufe gebunden.
 
-### 4.4 Modifikation bei Stage `reached`
+### 4.4 Modifikation bei Gate `reached`
 
-1. Altes Activity Set deaktivieren.  
-2. Nächste Stufe aktiv; neues Set aktiv.  
-3. Neues Set darf Übungen/Cadences/Alternanz/Actions ersetzen/erweitern/reduzieren.  
-4. Adaptation innerhalb Stufe (manuell) erlaubt und auditiert.  
-
-Erweitert AP2.0e auf ganze Activity Sets.
+1. Activity Set **dieses Gates** deaktivieren.  
+2. **Pro Strang:** nächstes Gate auf dem Pfad `active` (Graph-regelkonform); bei **Join-Gates** nach Verify.  
+3. Neues Set **strangspezifisch** — Stränge dürfen divergieren (z. B. Technik ↓, Dehnung ↑).  
+4. Adaptation innerhalb aktiven Gates (manuell) erlaubt und auditiert.
 
 ### 4.5 Datenfelder am Recurring (verbindlich)
 
 | Feld | Zweck |
 |------|-------|
-| Bindung an `maturity_stage` | Stage Activity Set |
+| `roadmap_item_id` | Gate / Activity Set |
+| `project_id` | Strang (Pfad); Pflicht bei Multi-Strang |
 | Cadence | Zeitversatz |
 | `alternation_group_id` + `alternation_order` | Alternanz (leer = keine Gruppe) |
 | status aktiv/inaktiv | Set-Wechsel / Adaptation |
 
 ### 4.6 Anti-Patterns
 
+- Flache Liste „Wiederkehrend“ ohne Gate/Strang-Bezug  
 - Übungen aller Stufen als flache Action-Liste  
 - Verpasste Übung → Duplikat-Task  
 - Alternanz ohne Gruppen-Semantik  
+- Ein uniformes Initiative-Set nach Join (statt strangspezifisch)
 
 ---
 
@@ -130,7 +137,7 @@ Erweitert AP2.0e auf ganze Activity Sets.
 | Aspekt | Kurz |
 |--------|------|
 | Dominanz | hybrid |
-| Horizon | aktive `maturity_stage` |
+| Horizon | aktive Gates (multi-strang) — PO-Lock §14 |
 | Leading | CadenceInstance; sekundär Stage-Action |
 | Next / Ranking | Spec-D D6 |
 | Attention / Events | Spec-D D7 / D8 |
@@ -175,12 +182,12 @@ Cadence im Detail am RecurringElement.
 
 | Fläche | Inhalt |
 |--------|--------|
-| **Plan → Stufen** | Timeline/Liste; aktiv; Kriterien; Verify |
-| **Plan → Stufe Detail** | Activity Set: Übungen (Cadence, Alternanz), Stage-Actions |
-| **Plan → Struktur** | Fähigkeits-Projects + Graph |
+| **Plan → Struktur** | Stränge (Projects) + Gate-Graph (parallel, Join) |
+| **Plan → Gate-Detail** | Activity Set: Übungen, Strang, Cadence, metric-Kriterien |
+| **Plan → Stufen** | Graph-/Listen-Ansicht aktiver Gates |
 | **Plan → Profil** | EFS Fokus/Frequenz/Disziplin |
-| **Ausführen / Today** | fällige Übungen + Alternanz-aktuell + Stage-Actions |
-| **Kontrolle** | Stufe, Next + Begründung, Attention, Verify-Fortschritt |
+| **Ausführen / Today** | fällige Übungen **gruppiert nach Strang/Gate** |
+| **Kontrolle** | aktive Gates, Join-Status, Kriterien-Fortschritt |
 | **Journey** | Stufenwechsel, Set-Modifikationen, erfüllte Übungen |
 | **Process** | Stufen → Stufe/Übungen → Ausführen → Kontrolle |
 | **Elements** | `next_action_primary`, `maturity_stage`, `recurring_rhythm` |
@@ -231,17 +238,16 @@ Cadence im Detail am RecurringElement.
 **PO-Validation 2026-07-28:** Detaillierte Findings + Architektur-Urteil →  
 `docs/sprints/Sprint1_AP2_1_Validation_Findings_Register_v0.1.md` (F-A1-01…10)
 
-**PO-Produkturteil A1:** **No-Go** — Leitfrage nicht erfüllt; Tages-Tracking, Messgrößen, Gate-Fortschritt und IA fehlen für echten Einsatz. Architektur/Spec **nicht** falsch; **Minimal-Slice** (CadenceInstance, Work=Übung) vor Re-Abnahme nötig.
+**PO-Produkturteil A1 (2026-07-28):** **No-Go** — Cadence ohne Progressions-IA. **Option C (PO-Lock):** [`SPEC_A1_Progression_Model_PO_Lock_v0.1.md`](SPEC_A1_Progression_Model_PO_Lock_v0.1.md) — Multi-Strang vor Re-Abnahme.
 
 | Bereich | Spec | Code/Truth | Lücke |
 |---------|------|------------|-------|
-| Registry / Kit | A1 + Stufen | weitgehend AP2.0e/Kit | Multi-Übung/Alternanz |
-| Methode | `maturity_progression` | vorhanden | Ranking Alternanz Spec-D |
-| Stage Activity Set | verbindlich | Teilmenge | Stage-Bindung + UI Detail |
-| Alternanz-Felder | verbindlich | fehlt/teilweise | Persistenz + Strategy |
-| EFS Pflicht | focus/frequency | Seeds prüfen | Seed-AP |
-| steering_elements | D11 | teilweise | FE/BE Parität |
-| UI Stufe-Detail | Pflicht | lückenhaft | UI-AP |
+| Progressionsmodell | PO-Lock | linear + flat recurring | Multi-Strang + Gate-Activity-Set |
+| Horizon multi-active | PO-Lock §3 | single-active (widerrufen) | AP-A1-PM-3 |
+| Stage Activity Set | Gate + Strang | Teilmenge | Gate-Detail UI + `project_id` |
+| Registry / Kit | Demo Spagat | geliefert | reicht nicht für PO-Kernbild |
+| UI Plan Struktur/Gate | Pflicht | fehlt | AP-A1-PM-4 |
+| Alternanz / metric | verbindlich | fehlt/teilweise | AP-A1-PM-5+ |
 
 ---
 
@@ -254,5 +260,25 @@ Fachmodell vollständig. Lücken (Alternanz, Multi-Übung-UI, EFS-Seeds) = Imple
 ## 13. Nachfolger
 
 - Alternanz-Persistenz + Strategy  
-- UI Stufe-Detail / Activity Set  
-- Template Kumite  
+- UI Plan → Struktur + Gate-Detail / Activity Set  
+- Template Kumite / Mawashi (Multi-Strang)
+
+---
+
+## 14. PO-Lock Progressionsmodell (2026-07-28, Option C)
+
+**Verbindlich** für Horizon, Stränge, Gate-Activity-Sets und MVP-Abgrenzung:
+
+→ [`SPEC_A1_Progression_Model_PO_Lock_v0.1.md`](SPEC_A1_Progression_Model_PO_Lock_v0.1.md)
+
+Kurzfassung:
+
+| Thema | Lock |
+|-------|------|
+| Strang | `Project` — parallele Fähigkeits-Pfade |
+| Gate | `maturity_stage` im Graph; Join-Gates mit `requires` |
+| Übung | `RecurringElement` = Übung; Rhythmus = Feld; **nicht** losgelöstes Objekt |
+| Horizon | **Multi-active** Gates; pro Strang max. 1 aktives Gate auf Pfad |
+| MVP A1 Go | ≥2 Stränge + Join + Gate-Activity-Set + Today — nicht nur lineares Spagat-Demo |
+
+Implementierungsfolge: PO-Lock §8 (`AP-A1-PM-1` … `PM-6`).

docs/sprints/Sprint1_AP2_1_MVP_Validation_Report_v0.3.md

@@ -19,18 +19,18 @@
 
 ## 1. Executive Summary
 
-| Entscheidung | ☐ Go Stufe A · ☐ Bedingt · ☑ No-Go (bis A1 nachgezogen oder Scope-PO) |
+| Entscheidung | ☐ Go Stufe A · ☐ Bedingt · ☑ No-Go (A1 bis Progressions-IA; Option C PO-Lock) |
 |--------------|-------------------------------------|
 
 **Kurzfazit (3–5 Sätze):**
 
 Technisch: pytest grün, A1-Happy-Path (Anlage → Verify → Stufenwechsel) durchspielbar.  
-Produkt (PO): **A1 No-Go** — Leitfrage nicht beantwortbar; tagesbezogenes Tracking, Messgrößen und Gate-Fortschritt fehlen; extreme Unübersichtlichkeit; **Hürden > Nutzen**. A2/B2b noch offen.
+Produkt (PO): **A1 No-Go** — Cadence-Plumbing reicht nicht; Nutzerbild = **parallele Stränge + Gate-Graph + Activity Sets**, nicht flache „Wiederkehrend“-Liste. **PO-Entscheid Option C:** Spec schärfen → [`SPEC_A1_Progression_Model_PO_Lock_v0.1.md`](../product/archetypes/SPEC_A1_Progression_Model_PO_Lock_v0.1.md). A2/B2b noch offen.
 
 **Blocker (falls No-Go / Bedingt):**
 
-- **A1:** CadenceInstance/Tages-„erledigt“, Work=Übung, Gate-Fortschritt, IA — siehe Findings Register §6.1 (F-A1-02…10)
-- **Gesamt Stufe A:** MVP §4 verlangt A1 — Go erst nach A1 Minimum Slice **oder** PO-Scope-Entscheidung (A1 aus Stufe-A-Abnahfe)
+- **A1:** Progressions-IA gemäß PO-Lock §6–8 (`AP-A1-PM-2` … `PM-6`) — Multi-Strang, Gate-Activity-Set, Plan-UI, Today gruppiert
+- **Gesamt Stufe A:** MVP §4 verlangt A1 — Go erst nach PO-Kernbild (≥2 Stränge + Join) durchspielbar
 
 ---
 

docs/sprints/Sprint1_AP2_1_Validation_Findings_Register_v0.1.md

@@ -206,13 +206,22 @@ Alternanz, volle Metric-Engine, Activity-Set-Automation → **nach** Slice 1–4
 
 ## 7. Konsequenz für AP2.1 / MVP Stufe A
 
-| Option | Bedeutung |
-|--------|-----------|
-| **A — A1 nachziehen** | Validation pausieren; **A1 Minimum Slice** (§6.1) liefern; A1 erneut smoke-testen |
-| **B — MVP-Definition anpassen** | A1 vorübergehend aus Stufe-A-Abnahfe (PO-Entscheidung + Doku) — **nur wenn A2+B2b als MVP reichen** |
-| **C — Gesamt No-Go** | AP2.1 stoppt bei Stufe A bis A1 oder Scope-Entscheidung |
+| Option | Bedeutung | PO 2026-07-28 |
+|--------|-----------|---------------|
+| **A — A1 nachziehen** | Minimum Slice liefern | ◐ Cadence done; Progressions-IA offen |
+| **B — MVP-Definition anpassen** | A1 aus Stufe-A-Abnahfe | nicht gewählt |
+| **C — Spec schärfen, dann implementieren** | PO-Lock vor Coding | **✓ gewählt** |
 
-**Empfehlung:** **Option A** — Architektur trägt; Spec war richtig; Implementierung war zu dünn. A2/B2b-Smoke **parallel** möglich, Gesamt-Go aber nicht ohne A1-Lösung (Option A oder explizite B).
+**PO-Lock (Option C):** [`docs/product/archetypes/SPEC_A1_Progression_Model_PO_Lock_v0.1.md`](../product/archetypes/SPEC_A1_Progression_Model_PO_Lock_v0.1.md)
+
+Kernentscheide:
+
+- **Multi-Strang** (Projects) + **Gate-Graph** + **Join-Gates**
+- **Horizon:** mehrere aktive Gates (nicht eine Stufe initiative-weit)
+- **Übung** = `RecurringElement` am Gate + Strang; Rhythmus = Feld
+- **A1 Go MVP:** ≥2 Stränge + 1 Join + Gate-Activity-Set + Today — nicht nur Spagat-Demo
+
+**Validation A1:** pausiert bis `AP-A1-PM-4` (Plan Struktur + Gate-Detail). A2/B2b-Smoke **parallel** möglich.
 
 ---
 

docs/sprints/Sprint1_AP_A1_Minimum_Usability_Slice_v0.1.md

@@ -1,7 +1,7 @@
 # AP A1 — Minimum Usability Slice
 ## Auftrag v0.1
 
-**Status:** freigegeben (PO folgt Option A, 2026-07-28) · **Implementierung A1.1–A1.3 abgeschlossen** (Re-Abnahme ausstehend)  
+**Status:** freigegeben (PO folgt Option A, 2026-07-28) · **superseded by Option C PO-Lock** — siehe [`SPEC_A1_Progression_Model_PO_Lock_v0.1.md`](../archetypes/SPEC_A1_Progression_Model_PO_Lock_v0.1.md)  
 **Auslöser:** AP2.1 PO No-Go A1 — [`Sprint1_AP2_1_Validation_Findings_Register_v0.1.md`](Sprint1_AP2_1_Validation_Findings_Register_v0.1.md) §6.1  
 **Ziel:** A1 **real nutzbar** für Tages-Tracking + Gate-Einschätzung + klare Today-Ansicht — **ohne** Architektur-Neudesign.
 

frontend/src/components/JoinWaitlistPanel.jsx

@@ -0,0 +1,55 @@
+import { useMemo } from 'react'
+import { EmptyState } from './EmptyState.jsx'
+
+/**
+ * A1 — Join-Schaltknoten: wartende Eingänge (kein Activity Set am Join).
+ */
+export function JoinWaitlistPanel({ progressionState = null }) {
+  const joins = useMemo(() => {
+    const list = progressionState?.joins || []
+    return list.filter(
+      (join) => join.status !== 'reached' && (join.pending_inputs?.length || 0) > 0,
+    )
+  }, [progressionState])
+
+  if (joins.length === 0) {
+    return (
+      <section className="card join-waitlist-panel">
+        <h2>Join-Fortschritt</h2>
+        <EmptyState message="Keine Joins warten auf Eingänge." />
+      </section>
+    )
+  }
+
+  return (
+    <section className="card join-waitlist-panel">
+      <div className="section-header">
+        <div>
+          <h2>Join-Fortschritt</h2>
+          <p className="section-lead muted">
+            Konsolidierte Meilensteine — welche Strang-Gates fehlen noch zum Schalten?
+          </p>
+        </div>
+      </div>
+      <ul className="item-list join-waitlist-panel__list">
+        {joins.map((join) => (
+          <li key={join.join_id} className="list-item card-list-item">
+            <div className="list-item-main">
+              <strong>{join.title}</strong>
+              <p className="muted list-item-sub">
+                Wartet auf:{' '}
+                {(join.pending_inputs || [])
+                  .map((input) =>
+                    input.strand_title
+                      ? `${input.strand_title} / ${input.title}`
+                      : input.title,
+                  )
+                  .join(' · ')}
+              </p>
+            </div>
+          </li>
+        ))}
+      </ul>
+    </section>
+  )
+}

frontend/src/components/MaturityStagePanel.jsx

@@ -16,7 +16,8 @@ export function MaturityStagePanel({
     .filter((item) => item.item_type === 'maturity_stage')
     .sort((a, b) => (a.sort_order ?? 0) - (b.sort_order ?? 0))
 
-  const activeStage = stages.find((s) => s.status === 'active')
+  const activeStages = stages.filter((s) => s.status === 'active')
+  const activeStage = activeStages[0]
 
   useEffect(() => {
     if (!initiativeId) return undefined
@@ -40,15 +41,20 @@ export function MaturityStagePanel({
       <EmptyState message="Noch keine Reifegrad-Stufen — unter Plan anlegen oder Starter-Kit nutzen." />
     ) : (
       <>
-        {activeStage && (
+        {activeStages.length > 0 && (
           <>
             <p className="maturity-stage-active muted">
-              Aktive Stufe:{' '}
-              <Link to={gatePath(activeStage.id)} className="link-inline">
-                <strong>{activeStage.title}</strong>
-              </Link>
+              Aktive Gate(s):{' '}
+              {activeStages.map((stage, index) => (
+                <span key={stage.id}>
+                  {index > 0 ? ' · ' : ''}
+                  <Link to={gatePath(stage.id)} className="link-inline">
+                    <strong>{stage.title}</strong>
+                  </Link>
+                </span>
+              ))}
             </p>
-            {activeProgress && (
+            {activeStage && activeProgress && (
               <p className="maturity-stage-progress muted">
                 Gate-Fortschritt:{' '}
                 <strong>

frontend/src/components/RecurringRhythmPanel.jsx

@@ -12,10 +12,10 @@ function formatDueAt(iso) {
   }
 }
 
-function activeMaturityStage(roadmapItems = []) {
+function activeMaturityStages(roadmapItems = []) {
   return [...roadmapItems]
     .filter((item) => item.item_type === 'maturity_stage' && item.status === 'active')
-    .sort((a, b) => (a.sort_order ?? 0) - (b.sort_order ?? 0))[0]
+    .sort((a, b) => (a.sort_order ?? 0) - (b.sort_order ?? 0))
 }
 
 function practicesForStage(recurringItems = [], stageId) {
@@ -32,20 +32,22 @@ export function RecurringRhythmPanel({
   canManage = false,
   embedded = true,
 }) {
-  const stage = activeMaturityStage(roadmapItems)
-  const stagePractices = practicesForStage(recurringItems, stage?.id)
+  const stages = activeMaturityStages(roadmapItems)
+  const stagePractices = stages.flatMap((stage) =>
+    practicesForStage(recurringItems, stage.id),
+  )
   const active = stagePractices.filter((item) => item.status === 'active')
   const paused = stagePractices.filter((item) => item.status === 'paused')
 
   const body =
-    !stage ? (
-      <EmptyState message="Keine aktive Reifegrad-Stufe — Plan → Stufen prüfen." />
+    stages.length === 0 ? (
+      <EmptyState message="Keine aktiven Work-Gates — Plan → Struktur prüfen." />
     ) : stagePractices.length === 0 ? (
-      <EmptyState message="Keine Übungen für diese Stufe — Starter-Kit oder Stufenwechsel prüfen." />
+      <EmptyState message="Keine Übungen auf aktiven Gates — Starter-Kit oder Join prüfen." />
     ) : (
       <>
         <p className="recurring-rhythm-summary muted">
-          Stufe <strong>{stage.title}</strong> — {active.length} aktiv
+          {stages.length} aktive Gate(s) — {active.length} Übung(en) aktiv
           {paused.length > 0 ? `, ${paused.length} pausiert` : ''}.
         </p>
         <ul className="item-list recurring-rhythm-list">
@@ -92,9 +94,9 @@ export function RecurringRhythmPanel({
     <section className="card recurring-rhythm-panel">
       <div className="section-header">
         <div>
-          <h2>Übungen der Stufe</h2>
+          <h2>Übungen der aktiven Gates</h2>
           <p className="section-lead muted">
-            Activity Set der aktiven Reifegrad-Stufe — nicht die Gates selbst (A1).
+            Activity Sets aller aktiven Work-Gates — Join-Knoten haben keine Übungen (A1).
           </p>
         </div>
       </div>

frontend/src/components/WorkTodayPracticePanel.jsx

@@ -13,17 +13,22 @@ function formatDue(iso) {
   }
 }
 
-function activeMaturityStage(roadmapItems = []) {
+function activeWorkGates(roadmapItems = []) {
   return [...roadmapItems]
     .filter((item) => item.item_type === 'maturity_stage' && item.status === 'active')
-    .sort((a, b) => (a.sort_order ?? 0) - (b.sort_order ?? 0))[0]
+    .sort((a, b) => (a.sort_order ?? 0) - (b.sort_order ?? 0))
 }
 
-function exercisesForStage(recurringItems = [], stageId) {
-  const active = (recurringItems || []).filter((item) => item.status === 'active')
-  if (!stageId) return active
-  const bound = active.filter((item) => item.roadmap_item_id === stageId)
-  return bound.length > 0 ? bound : active
+function exercisesForGate(recurringItems = [], gateId) {
+  return (recurringItems || []).filter(
+    (item) => item.status === 'active' && item.roadmap_item_id === gateId,
+  )
+}
+
+function strandLabel(gate, projectsById) {
+  const projectId = gate.strand_project_id
+  if (!projectId) return 'Training'
+  return projectsById.get(projectId)?.title || 'Strang'
 }
 
 function ExerciseRow({ exercise, canManage, busy, onCompleted }) {
@@ -94,23 +99,33 @@ function ExerciseRow({ exercise, canManage, busy, onCompleted }) {
 }
 
 /**
- * A1 — Heutige Übungen der aktiven Stufe (CadenceInstance je Übung).
+ * A1 — Heutige Übungen aller aktiven Work-Gates, gruppiert nach Strang.
  */
 export function WorkTodayPracticePanel({
   initiativeId,
   roadmapItems = [],
   recurringItems = [],
+  projects = [],
   canManage = false,
   onCompleted,
   busy = false,
 }) {
-  const stage = useMemo(() => activeMaturityStage(roadmapItems), [roadmapItems])
-
-  const todayExercises = useMemo(
-    () => exercisesForStage(recurringItems, stage?.id),
-    [recurringItems, stage?.id],
+  const projectsById = useMemo(
+    () => new Map((projects || []).map((project) => [project.id, project])),
+    [projects],
   )
 
+  const gates = useMemo(() => activeWorkGates(roadmapItems), [roadmapItems])
+
+  const grouped = useMemo(() => {
+    return gates.map((gate) => ({
+      gate,
+      strand: strandLabel(gate, projectsById),
+      exercises: exercisesForGate(recurringItems, gate.id),
+    }))
+  }, [gates, recurringItems, projectsById])
+
+  const todayExercises = grouped.flatMap((group) => group.exercises)
   const pending = todayExercises.filter((item) => !item.today_completed)
   const allDone = todayExercises.length > 0 && pending.length === 0
 
@@ -120,20 +135,15 @@ export function WorkTodayPracticePanel({
         <div>
           <h2>Heutige Übungen</h2>
           <p className="section-lead muted">
-            {stage ? (
-              <>
-                Aktive Stufe: <strong>{stage.title}</strong> — pro Übung erledigen, optional Messwert
-                notieren.
-              </>
-            ) : (
-              'Tages-Tracking für die aktive Reifegrad-Stufe.'
-            )}
+            {gates.length > 0
+              ? `${gates.length} aktive Gate(s) — pro Übung erledigen, optional Messwert notieren.`
+              : 'Tages-Tracking für aktive Work-Gates auf allen Strängen.'}
           </p>
         </div>
       </div>
 
       {todayExercises.length === 0 ? (
-        <EmptyState message="Keine Übungen für die aktive Stufe — Starter-Kit oder Stufenwechsel prüfen." />
+        <EmptyState message="Keine Übungen auf aktiven Gates — Starter-Kit oder Join-Fortschritt prüfen." />
       ) : (
         <>
           {allDone && (
@@ -141,17 +151,26 @@ export function WorkTodayPracticePanel({
               Alle Übungen für heute erledigt — nächste Fälligkeit morgen.
             </p>
           )}
-          <ul className="item-list work-today-practice__list">
-            {todayExercises.map((exercise) => (
-              <ExerciseRow
-                key={exercise.id}
-                exercise={exercise}
-                canManage={canManage}
-                busy={busy}
-                onCompleted={onCompleted}
-              />
-            ))}
-          </ul>
+          {grouped.map(({ gate, strand, exercises }) =>
+            exercises.length === 0 ? null : (
+              <div key={gate.id} className="work-today-practice__strand">
+                <h3 className="work-today-practice__strand-title">
+                  {strand} — {gate.title}
+                </h3>
+                <ul className="item-list work-today-practice__list">
+                  {exercises.map((exercise) => (
+                    <ExerciseRow
+                      key={exercise.id}
+                      exercise={exercise}
+                      canManage={canManage}
+                      busy={busy}
+                      onCompleted={onCompleted}
+                    />
+                  ))}
+                </ul>
+              </div>
+            ),
+          )}
         </>
       )}
 

frontend/src/composition/compositionProviders.js

@@ -58,6 +58,16 @@ export const COMPOSITION_PROVIDERS = [
     scopeTypes: ['initiative'],
     order: 10,
   },
+  {
+    key: 'steering.join_waitlist',
+    kind: 'steering_element',
+    steeringElement: 'maturity_stage',
+    slotKeys: ['control.status.steering'],
+    componentKey: 'JoinWaitlistPanel',
+    requiresCapability: 'kairo.initiative.read',
+    scopeTypes: ['initiative'],
+    order: 14,
+  },
   {
     key: 'steering.maturity_stage',
     kind: 'steering_element',

frontend/src/composition/providerComponents.jsx

@@ -2,6 +2,7 @@ import { Link } from 'react-router-dom'
 import { scopedPath } from '../utils/routes.js'
 import { SteeringSnapshotPanel } from '../components/SteeringSnapshotPanel.jsx'
 import { CriticalPathPanel } from '../components/CriticalPathPanel.jsx'
+import { JoinWaitlistPanel } from '../components/JoinWaitlistPanel.jsx'
 import { MaturityStagePanel } from '../components/MaturityStagePanel.jsx'
 import { RecurringRhythmPanel } from '../components/RecurringRhythmPanel.jsx'
 import { AgentSlotsPanel } from '../components/AgentSlotsPanel.jsx'
@@ -47,6 +48,7 @@ export const PROVIDER_COMPONENTS = {
   WidgetHost,
   WorkActionsPanel,
   WorkTodayPracticePanel,
+  JoinWaitlistPanel,
 }
 
 /**

frontend/src/composition/resolveSteeringComposition.js

@@ -203,11 +203,16 @@ export function buildProviderProps(provider, input) {
         recurringItems: ops.recurringItems || [],
         canManage: capabilities.has('kairo.recurring.manage'),
       }
+    case 'JoinWaitlistPanel':
+      return {
+        progressionState: input.steeringSnapshot?.progression_state ?? null,
+      }
     case 'WorkTodayPracticePanel':
       return {
         initiativeId: ops.initiativeId,
         roadmapItems: ops.roadmapItems || [],
         recurringItems: ops.recurringItems || [],
+        projects: ops.projects || [],
         canManage: capabilities.has('kairo.recurring.manage'),
         busy: ops.formBusy,
         onCompleted: async () => {

frontend/src/constants/status.js

@@ -92,6 +92,7 @@ export const ROADMAP_ITEM_TYPE_LABELS = {
   milestone: 'Meilenstein / Gate',
   review_gate: 'Review-Gate',
   maturity_stage: 'Reifegrad-Stufe',
+  join_gate: 'Join / Schaltknoten',
 }
 
 export const SEQUENCING_MODE_LABELS = {