intermittent commit

LICENSE

@@ -0,0 +1,235 @@
+GNU AFFERO GENERAL PUBLIC LICENSE
+Version 3, 19 November 2007
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+Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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README.md

@@ -1,12 +1,17 @@
 # GovOPlaN Scheduling
 
+<!-- govoplan-repository-type:start -->
+**Repository type:** module (domain).
+<!-- govoplan-repository-type:end -->
+
 GovOPlaN Scheduling owns meeting scheduling and `Terminfindung`: finding
 suitable times across people, resources, calendars, constraints, and scheduling
 polls.
 
-This repository is currently a tag-only scaffold. It should gain package
+This repository is initialized as a discoverable module seed. It exposes the
-metadata, a backend manifest, and a WebUI package together when the first
+module manifest, permission surface, role templates, and documentation metadata
-implementation slice is designed.
+before runtime APIs, database models, migrations, and WebUI routes are
+introduced.
 
 The core boundary decision register is in
 `/mnt/DATA/git/govoplan-core/docs/MODULE_ARCHITECTURE.md`.
@@ -15,7 +20,7 @@ The core boundary decision register is in
 
 Scheduling owns:
 
-- meeting scheduling polls and proposals
+- meeting scheduling polls and proposals built on `govoplan-poll`
 - participant availability collection
 - time-window and resource constraints
 - candidate-slot ranking and conflict explanation
@@ -64,24 +69,52 @@ unless a configured process requires longer evidence retention.
 - `scheduling.decisionHandoff`
 - `scheduling.portalParticipation`
 
+## Manifest Dependency Decision
+
+The Scheduling manifest declares `poll` as a required dependency because
+availability collection and option/date poll primitives belong in
+`govoplan-poll`.
+
+Scheduling should model each meeting-finding flow as a poll-backed workflow:
+Poll owns candidate options, signed participation links, responses, visibility,
+and result aggregation. Scheduling stores the scheduling-specific context and
+uses Poll context fields to point back to its request or proposal resource.
+Typical workflow steps are collect availability, rank candidates, decide, notify
+participants, and hand off to Calendar or Appointments.
+
+The manifest declares `access` and `evaluation` as optional dependencies.
+Scheduling may use Access for identity, groups, and permissions, and may trigger
+post-event or post-appointment feedback through Evaluation. It must not require
+either module just to find a meeting time.
+
 ## Expected Integrations
 
+- `govoplan-poll`: required availability matrix and lightweight poll primitives
+- `govoplan-evaluation`: optional post-event, post-appointment, or process feedback
 - `govoplan-calendar`: availability, calendars, resources, rooms, recurrence, Open-Xchange/calendar adapters
 - `govoplan-appointments`: conversion from a selected meeting time into a booked appointment where appropriate
-- `govoplan-access` and `govoplan-idm`: participants, groups, directory lookup, permissions
+- `govoplan-access` and `govoplan-idm`: optional participants, groups, directory lookup, permissions
 - `govoplan-mail` and `govoplan-notifications`: invitations, reminders, confirmations
 - `govoplan-portal`: external participant scheduling flows
 - `govoplan-workflow` and `govoplan-tasks`: follow-up work after a time is selected
 
 ## First Package Scaffold Decision
 
-The first scaffold should include both backend and WebUI package metadata once
+The first backend implementation slice adds runtime APIs and storage around
-implementation starts:
+poll-backed scheduling requests:
 
-- backend manifest, permissions, DTOs, and APIs for internal polls
+- scheduling request, candidate slot, and participant storage
-- WebUI route contribution for poll creation and response collection
+- automatic `govoplan-poll` availability poll creation
-- capability contracts for calendar free/busy, access/IDM lookup,
+- signed poll invitations for internal or external participants
-  mail/notification sending, portal participation links, appointment handoff,
+- request lifecycle APIs: draft, collecting, closed, decided, handed off, cancelled
-  and workflow/task follow-up
+- result summaries sourced from Poll response aggregation
+- optional Calendar free/busy checks, tentative holds, and final event creation
+- notification outbox jobs for invitations, reminders, decisions, and cancellations
+- a first Scheduling WebUI package with request creation, slot matrix, Calendar
+  actions, decisions, and notification-job creation
+
+The next slices should add real notification delivery workers, richer public
+participant pages, Calendar hold cleanup after decision, and advanced scoring
+constraints such as required participants and quorum rules.
 
 The active backlog lives in Gitea issues.

pyproject.toml

@@ -0,0 +1,25 @@
+[build-system]
+requires = ["setuptools>=69", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "govoplan-scheduling"
+version = "0.1.8"
+description = "GovOPlaN meeting scheduling and Terminfindung module seed."
+readme = "README.md"
+requires-python = ">=3.12"
+license = { file = "LICENSE" }
+authors = [{ name = "GovOPlaN" }]
+dependencies = [
+  "govoplan-core>=0.1.8",
+  "govoplan-poll>=0.1.8",
+]
+
+[tool.setuptools.packages.find]
+where = ["src"]
+
+[tool.setuptools.package-data]
+govoplan_scheduling = ["py.typed"]
+
+[project.entry-points."govoplan.modules"]
+scheduling = "govoplan_scheduling.backend.manifest:get_manifest"

src/govoplan_scheduling/__init__.py

@@ -0,0 +1,5 @@
+"""GovOPlaN Scheduling module."""
+
+__all__ = ["__version__"]
+
+__version__ = "0.1.8"

src/govoplan_scheduling/backend/__init__.py

@@ -0,0 +1 @@
+"""Backend package for the GovOPlaN Scheduling module."""

src/govoplan_scheduling/backend/db/__init__.py

@@ -0,0 +1,5 @@
+from __future__ import annotations
+
+from govoplan_scheduling.backend.db.models import SchedulingCandidateSlot, SchedulingNotification, SchedulingParticipant, SchedulingRequest
+
+__all__ = ["SchedulingCandidateSlot", "SchedulingNotification", "SchedulingParticipant", "SchedulingRequest"]

src/govoplan_scheduling/backend/db/models.py

@@ -0,0 +1,143 @@
+from __future__ import annotations
+
+import uuid
+from datetime import datetime
+from typing import Any
+
+from sqlalchemy import Boolean, DateTime, ForeignKey, Index, Integer, JSON, String, Text
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from govoplan_core.db.base import Base, TimestampMixin
+
+
+def new_uuid() -> str:
+    return str(uuid.uuid4())
+
+
+class SchedulingRequest(Base, TimestampMixin):
+    __tablename__ = "scheduling_requests"
+    __table_args__ = (
+        Index("ix_scheduling_requests_tenant_status", "tenant_id", "status"),
+        Index("ix_scheduling_requests_tenant_poll", "tenant_id", "poll_id"),
+        Index("ix_scheduling_requests_deadline", "tenant_id", "deadline_at"),
+    )
+
+    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
+    tenant_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
+    title: Mapped[str] = mapped_column(String(500), nullable=False)
+    description: Mapped[str | None] = mapped_column(Text)
+    location: Mapped[str | None] = mapped_column(String(500))
+    timezone: Mapped[str] = mapped_column(String(100), default="UTC", nullable=False)
+    status: Mapped[str] = mapped_column(String(40), default="draft", nullable=False, index=True)
+    poll_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    selected_slot_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    organizer_user_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    deadline_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True, index=True)
+    allow_external_participants: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
+    allow_participant_updates: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
+    result_visibility: Mapped[str] = mapped_column(String(30), default="after_close", nullable=False)
+    calendar_integration_enabled: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
+    calendar_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    calendar_freebusy_enabled: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
+    calendar_hold_enabled: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
+    create_calendar_event_on_decision: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
+    calendar_event_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    handed_off_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    cancelled_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    deleted_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True, index=True)
+    metadata_: Mapped[dict[str, Any] | None] = mapped_column("metadata", JSON, nullable=True)
+
+    slots: Mapped[list["SchedulingCandidateSlot"]] = relationship(
+        back_populates="request",
+        cascade="all, delete-orphan",
+        order_by="SchedulingCandidateSlot.position",
+    )
+    participants: Mapped[list["SchedulingParticipant"]] = relationship(
+        back_populates="request",
+        cascade="all, delete-orphan",
+        order_by="SchedulingParticipant.created_at",
+    )
+
+
+class SchedulingCandidateSlot(Base, TimestampMixin):
+    __tablename__ = "scheduling_candidate_slots"
+    __table_args__ = (
+        Index("ix_scheduling_candidate_slots_request_position", "request_id", "position"),
+        Index("ix_scheduling_candidate_slots_range", "tenant_id", "start_at", "end_at"),
+    )
+
+    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
+    tenant_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
+    request_id: Mapped[str] = mapped_column(ForeignKey("scheduling_requests.id", ondelete="CASCADE"), nullable=False, index=True)
+    poll_option_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    label: Mapped[str] = mapped_column(String(500), nullable=False)
+    description: Mapped[str | None] = mapped_column(Text)
+    start_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, index=True)
+    end_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, index=True)
+    timezone: Mapped[str] = mapped_column(String(100), default="UTC", nullable=False)
+    location: Mapped[str | None] = mapped_column(String(500))
+    position: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
+    freebusy_checked_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    freebusy_status: Mapped[str | None] = mapped_column(String(40), nullable=True, index=True)
+    freebusy_conflicts: Mapped[list[dict[str, Any]]] = mapped_column(JSON, default=list, nullable=False)
+    tentative_hold_event_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    deleted_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True, index=True)
+    metadata_: Mapped[dict[str, Any] | None] = mapped_column("metadata", JSON, nullable=True)
+
+    request: Mapped[SchedulingRequest] = relationship(back_populates="slots")
+
+
+class SchedulingParticipant(Base, TimestampMixin):
+    __tablename__ = "scheduling_participants"
+    __table_args__ = (
+        Index("ix_scheduling_participants_request", "tenant_id", "request_id"),
+        Index("ix_scheduling_participants_request_email", "request_id", "email"),
+        Index("ix_scheduling_participants_request_respondent", "request_id", "respondent_id"),
+    )
+
+    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
+    tenant_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
+    request_id: Mapped[str] = mapped_column(ForeignKey("scheduling_requests.id", ondelete="CASCADE"), nullable=False, index=True)
+    respondent_id: Mapped[str | None] = mapped_column(String(255), nullable=True, index=True)
+    display_name: Mapped[str | None] = mapped_column(String(500), nullable=True)
+    email: Mapped[str | None] = mapped_column(String(320), nullable=True, index=True)
+    participant_type: Mapped[str] = mapped_column(String(30), default="external", nullable=False, index=True)
+    required: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
+    status: Mapped[str] = mapped_column(String(40), default="invited", nullable=False, index=True)
+    poll_invitation_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    last_invited_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    responded_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    deleted_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True, index=True)
+    metadata_: Mapped[dict[str, Any] | None] = mapped_column("metadata", JSON, nullable=True)
+
+    request: Mapped[SchedulingRequest] = relationship(back_populates="participants")
+
+
+class SchedulingNotification(Base, TimestampMixin):
+    __tablename__ = "scheduling_notifications"
+    __table_args__ = (
+        Index("ix_scheduling_notifications_request_status", "request_id", "status"),
+        Index("ix_scheduling_notifications_tenant_status", "tenant_id", "status"),
+    )
+
+    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
+    tenant_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
+    request_id: Mapped[str] = mapped_column(ForeignKey("scheduling_requests.id", ondelete="CASCADE"), nullable=False, index=True)
+    participant_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    event_kind: Mapped[str] = mapped_column(String(40), nullable=False, index=True)
+    channel: Mapped[str] = mapped_column(String(40), default="mail", nullable=False, index=True)
+    recipient: Mapped[str | None] = mapped_column(String(500), nullable=True, index=True)
+    status: Mapped[str] = mapped_column(String(40), default="pending", nullable=False, index=True)
+    payload: Mapped[dict[str, Any]] = mapped_column(JSON, default=dict, nullable=False)
+    error: Mapped[str | None] = mapped_column(Text)
+    sent_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    metadata_: Mapped[dict[str, Any] | None] = mapped_column("metadata", JSON, nullable=True)
+
+
+__all__ = [
+    "SchedulingCandidateSlot",
+    "SchedulingNotification",
+    "SchedulingParticipant",
+    "SchedulingRequest",
+    "new_uuid",
+]

src/govoplan_scheduling/backend/manifest.py

@@ -0,0 +1,182 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+from govoplan_core.core.access import CAPABILITY_AUTH_PERMISSION_EVALUATOR, CAPABILITY_AUTH_PRINCIPAL_RESOLVER
+from govoplan_core.core.module_guards import drop_table_retirement_provider, persistent_table_uninstall_guard
+from govoplan_core.core.modules import (
+    DocumentationTopic,
+    FrontendModule,
+    MigrationSpec,
+    ModuleContext,
+    ModuleInterfaceProvider,
+    ModuleInterfaceRequirement,
+    ModuleManifest,
+    NavItem,
+    PermissionDefinition,
+    RoleTemplate,
+)
+from govoplan_core.db.base import Base
+from govoplan_scheduling.backend.db import models as scheduling_models  # noqa: F401 - populate Scheduling ORM metadata
+
+MODULE_ID = "scheduling"
+MODULE_NAME = "Scheduling"
+MODULE_VERSION = "0.1.8"
+READ_SCOPE = "scheduling:schedule:read"
+WRITE_SCOPE = "scheduling:schedule:write"
+ADMIN_SCOPE = "scheduling:schedule:admin"
+RESPOND_SCOPE = "scheduling:availability:write"
+
+
+def _permission(scope: str, label: str, description: str) -> PermissionDefinition:
+    module_id, resource, action = scope.split(":", 2)
+    return PermissionDefinition(
+        scope=scope,
+        label=label,
+        description=description,
+        category="Scheduling",
+        level="tenant",
+        module_id=module_id,
+        resource=resource,
+        action=action,
+    )
+
+
+PERMISSIONS = (
+    _permission(READ_SCOPE, "View scheduling", "Read scheduling polls, proposals, participant state, and selected outcomes."),
+    _permission(WRITE_SCOPE, "Manage scheduling", "Create and update scheduling polls, candidate slots, reminders, and decision handoff."),
+    _permission(ADMIN_SCOPE, "Administer scheduling", "Configure tenant-level scheduling policies, external participation, and retention defaults."),
+    _permission(RESPOND_SCOPE, "Respond to scheduling polls", "Submit and update own scheduling availability responses."),
+)
+
+ROLE_TEMPLATES = (
+    RoleTemplate(
+        slug="scheduling_manager",
+        name="Scheduling manager",
+        description="Create scheduling polls, manage candidate slots, and decide outcomes.",
+        permissions=(READ_SCOPE, WRITE_SCOPE, RESPOND_SCOPE),
+    ),
+    RoleTemplate(
+        slug="scheduling_participant",
+        name="Scheduling participant",
+        description="Read assigned scheduling polls and submit own availability.",
+        permissions=(READ_SCOPE, RESPOND_SCOPE),
+    ),
+)
+
+DOCUMENTATION = (
+    DocumentationTopic(
+        id="scheduling.module-boundary",
+        title="Scheduling module boundary",
+        summary="Meeting scheduling and Terminfindung built on reusable Poll availability primitives.",
+        body=(
+            "Scheduling owns meeting scheduling workflows, candidate slots, participant availability "
+            "collection, conflict explanation, reminders, and decision handoff. It depends on Poll "
+            "for reusable availability matrices and poll-backed workflow context, and can optionally "
+            "trigger Evaluation for post-event feedback. "
+            "Access is optional: when installed, Scheduling can use principal resolution, permission "
+            "evaluation, groups, and role templates; without it, reduced signed-link or local organizer "
+            "flows remain possible."
+        ),
+        layer="available",
+        documentation_types=("admin",),
+        audience=("operator", "module_admin", "product_owner"),
+        related_modules=("poll", "evaluation", "calendar", "appointments", "mail", "notifications", "portal"),
+        metadata={"seed": True},
+    ),
+)
+
+
+def _tenant_summary(session, tenant_id: str) -> dict[str, int]:
+    from govoplan_scheduling.backend.db.models import SchedulingCandidateSlot, SchedulingNotification, SchedulingParticipant, SchedulingRequest
+
+    return {
+        "scheduling_requests": (
+            session.query(SchedulingRequest)
+            .filter(SchedulingRequest.tenant_id == tenant_id, SchedulingRequest.deleted_at.is_(None))
+            .count()
+        ),
+        "scheduling_candidate_slots": (
+            session.query(SchedulingCandidateSlot)
+            .filter(SchedulingCandidateSlot.tenant_id == tenant_id, SchedulingCandidateSlot.deleted_at.is_(None))
+            .count()
+        ),
+        "scheduling_participants": (
+            session.query(SchedulingParticipant)
+            .filter(SchedulingParticipant.tenant_id == tenant_id, SchedulingParticipant.deleted_at.is_(None))
+            .count()
+        ),
+        "scheduling_notifications": (
+            session.query(SchedulingNotification)
+            .filter(SchedulingNotification.tenant_id == tenant_id, SchedulingNotification.status == "pending")
+            .count()
+        ),
+    }
+
+
+def _scheduling_router(context: ModuleContext):
+    from govoplan_scheduling.backend.runtime import configure_runtime
+    from govoplan_scheduling.backend.router import router
+
+    configure_runtime(registry=context.registry, settings=context.settings)
+    return router
+
+
+manifest = ModuleManifest(
+    id=MODULE_ID,
+    name=MODULE_NAME,
+    version=MODULE_VERSION,
+    dependencies=("poll",),
+    optional_dependencies=("access", "calendar", "appointments", "evaluation", "mail", "notifications", "portal", "workflow", "tasks", "idm", "organizations", "addresses"),
+    optional_capabilities=(CAPABILITY_AUTH_PRINCIPAL_RESOLVER, CAPABILITY_AUTH_PERMISSION_EVALUATOR),
+    provides_interfaces=(
+        ModuleInterfaceProvider(name="scheduling.candidate_slots", version="0.1.8"),
+        ModuleInterfaceProvider(name="scheduling.decision_handoff", version="0.1.8"),
+    ),
+    requires_interfaces=(
+        ModuleInterfaceRequirement(name="poll.availability_matrix", version_min="0.1.8", version_max_exclusive="0.2.0"),
+        ModuleInterfaceRequirement(name="poll.workflow_context", version_min="0.1.8", version_max_exclusive="0.2.0"),
+        ModuleInterfaceRequirement(name="poll.signed_participation", version_min="0.1.8", version_max_exclusive="0.2.0", optional=True),
+        ModuleInterfaceRequirement(name="evaluation.feedback", version_min="0.1.8", version_max_exclusive="0.2.0", optional=True),
+        ModuleInterfaceRequirement(name="notifications.dispatch", version_min="0.1.8", version_max_exclusive="0.2.0", optional=True),
+        ModuleInterfaceRequirement(name="addresses.lookup", version_min="0.1.0", version_max_exclusive="0.2.0", optional=True),
+    ),
+    permissions=PERMISSIONS,
+    role_templates=ROLE_TEMPLATES,
+    nav_items=(NavItem(path="/scheduling", label="Scheduling", icon="calendar-clock", required_any=(READ_SCOPE,), order=56),),
+    frontend=FrontendModule(
+        module_id=MODULE_ID,
+        package_name="@govoplan/scheduling-webui",
+        nav_items=(NavItem(path="/scheduling", label="Scheduling", icon="calendar-clock", required_any=(READ_SCOPE,), order=56),),
+    ),
+    route_factory=_scheduling_router,
+    tenant_summary_providers=(_tenant_summary,),
+    migration_spec=MigrationSpec(
+        module_id=MODULE_ID,
+        metadata=Base.metadata,
+        script_location=str(Path(__file__).with_name("migrations") / "versions"),
+        retirement_supported=True,
+        retirement_provider=drop_table_retirement_provider(
+            scheduling_models.SchedulingRequest,
+            scheduling_models.SchedulingCandidateSlot,
+            scheduling_models.SchedulingParticipant,
+            scheduling_models.SchedulingNotification,
+            label="Scheduling",
+        ),
+        retirement_notes="Destructive retirement drops scheduling-owned database tables after the installer captures a database snapshot.",
+    ),
+    uninstall_guard_providers=(
+        persistent_table_uninstall_guard(
+            scheduling_models.SchedulingRequest,
+            scheduling_models.SchedulingCandidateSlot,
+            scheduling_models.SchedulingParticipant,
+            scheduling_models.SchedulingNotification,
+            label="Scheduling",
+        ),
+    ),
+    documentation=DOCUMENTATION,
+)
+
+
+def get_manifest() -> ModuleManifest:
+    return manifest

src/govoplan_scheduling/backend/migrations/__init__.py

@@ -0,0 +1 @@
+from __future__ import annotations

src/govoplan_scheduling/backend/migrations/versions/3c4d5e6f7a8b_v018_scheduling_baseline.py

@@ -0,0 +1,156 @@
+"""v0.1.8 scheduling baseline
+
+Revision ID: 3c4d5e6f7a8b
+Revises: None
+Create Date: 2026-07-12 00:00:00.000000
+"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "3c4d5e6f7a8b"
+down_revision = None
+branch_labels = None
+depends_on = "2a3b4c5d6e7f"
+
+
+def upgrade() -> None:
+    op.create_table(
+        "scheduling_requests",
+        sa.Column("id", sa.String(length=36), nullable=False),
+        sa.Column("tenant_id", sa.String(length=36), nullable=False),
+        sa.Column("title", sa.String(length=500), nullable=False),
+        sa.Column("description", sa.Text(), nullable=True),
+        sa.Column("location", sa.String(length=500), nullable=True),
+        sa.Column("timezone", sa.String(length=100), nullable=False),
+        sa.Column("status", sa.String(length=40), nullable=False),
+        sa.Column("poll_id", sa.String(length=36), nullable=True),
+        sa.Column("selected_slot_id", sa.String(length=36), nullable=True),
+        sa.Column("organizer_user_id", sa.String(length=36), nullable=True),
+        sa.Column("deadline_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("allow_external_participants", sa.Boolean(), nullable=False),
+        sa.Column("allow_participant_updates", sa.Boolean(), nullable=False),
+        sa.Column("result_visibility", sa.String(length=30), nullable=False),
+        sa.Column("calendar_integration_enabled", sa.Boolean(), nullable=False),
+        sa.Column("calendar_id", sa.String(length=36), nullable=True),
+        sa.Column("calendar_freebusy_enabled", sa.Boolean(), nullable=False),
+        sa.Column("calendar_hold_enabled", sa.Boolean(), nullable=False),
+        sa.Column("create_calendar_event_on_decision", sa.Boolean(), nullable=False),
+        sa.Column("calendar_event_id", sa.String(length=36), nullable=True),
+        sa.Column("handed_off_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("cancelled_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("deleted_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("metadata", sa.JSON(), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+        sa.PrimaryKeyConstraint("id", name=op.f("pk_scheduling_requests")),
+    )
+    op.create_index(op.f("ix_scheduling_requests_calendar_event_id"), "scheduling_requests", ["calendar_event_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_requests_calendar_id"), "scheduling_requests", ["calendar_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_requests_deadline_at"), "scheduling_requests", ["deadline_at"], unique=False)
+    op.create_index(op.f("ix_scheduling_requests_deleted_at"), "scheduling_requests", ["deleted_at"], unique=False)
+    op.create_index(op.f("ix_scheduling_requests_organizer_user_id"), "scheduling_requests", ["organizer_user_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_requests_poll_id"), "scheduling_requests", ["poll_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_requests_selected_slot_id"), "scheduling_requests", ["selected_slot_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_requests_status"), "scheduling_requests", ["status"], unique=False)
+    op.create_index(op.f("ix_scheduling_requests_tenant_id"), "scheduling_requests", ["tenant_id"], unique=False)
+    op.create_index("ix_scheduling_requests_deadline", "scheduling_requests", ["tenant_id", "deadline_at"], unique=False)
+    op.create_index("ix_scheduling_requests_tenant_poll", "scheduling_requests", ["tenant_id", "poll_id"], unique=False)
+    op.create_index("ix_scheduling_requests_tenant_status", "scheduling_requests", ["tenant_id", "status"], unique=False)
+
+    op.create_table(
+        "scheduling_candidate_slots",
+        sa.Column("id", sa.String(length=36), nullable=False),
+        sa.Column("tenant_id", sa.String(length=36), nullable=False),
+        sa.Column("request_id", sa.String(length=36), nullable=False),
+        sa.Column("poll_option_id", sa.String(length=36), nullable=True),
+        sa.Column("label", sa.String(length=500), nullable=False),
+        sa.Column("description", sa.Text(), nullable=True),
+        sa.Column("start_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("end_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("timezone", sa.String(length=100), nullable=False),
+        sa.Column("location", sa.String(length=500), nullable=True),
+        sa.Column("position", sa.Integer(), nullable=False),
+        sa.Column("deleted_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("metadata", sa.JSON(), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+        sa.ForeignKeyConstraint(
+            ["request_id"],
+            ["scheduling_requests.id"],
+            name=op.f("fk_scheduling_candidate_slots_request_id_scheduling_requests"),
+            ondelete="CASCADE",
+        ),
+        sa.PrimaryKeyConstraint("id", name=op.f("pk_scheduling_candidate_slots")),
+    )
+    op.create_index(op.f("ix_scheduling_candidate_slots_deleted_at"), "scheduling_candidate_slots", ["deleted_at"], unique=False)
+    op.create_index(op.f("ix_scheduling_candidate_slots_end_at"), "scheduling_candidate_slots", ["end_at"], unique=False)
+    op.create_index(op.f("ix_scheduling_candidate_slots_poll_option_id"), "scheduling_candidate_slots", ["poll_option_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_candidate_slots_request_id"), "scheduling_candidate_slots", ["request_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_candidate_slots_start_at"), "scheduling_candidate_slots", ["start_at"], unique=False)
+    op.create_index(op.f("ix_scheduling_candidate_slots_tenant_id"), "scheduling_candidate_slots", ["tenant_id"], unique=False)
+    op.create_index(
+        "ix_scheduling_candidate_slots_range",
+        "scheduling_candidate_slots",
+        ["tenant_id", "start_at", "end_at"],
+        unique=False,
+    )
+    op.create_index(
+        "ix_scheduling_candidate_slots_request_position",
+        "scheduling_candidate_slots",
+        ["request_id", "position"],
+        unique=False,
+    )
+
+    op.create_table(
+        "scheduling_participants",
+        sa.Column("id", sa.String(length=36), nullable=False),
+        sa.Column("tenant_id", sa.String(length=36), nullable=False),
+        sa.Column("request_id", sa.String(length=36), nullable=False),
+        sa.Column("respondent_id", sa.String(length=255), nullable=True),
+        sa.Column("display_name", sa.String(length=500), nullable=True),
+        sa.Column("email", sa.String(length=320), nullable=True),
+        sa.Column("participant_type", sa.String(length=30), nullable=False),
+        sa.Column("required", sa.Boolean(), nullable=False),
+        sa.Column("status", sa.String(length=40), nullable=False),
+        sa.Column("poll_invitation_id", sa.String(length=36), nullable=True),
+        sa.Column("last_invited_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("responded_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("deleted_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("metadata", sa.JSON(), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+        sa.ForeignKeyConstraint(
+            ["request_id"],
+            ["scheduling_requests.id"],
+            name=op.f("fk_scheduling_participants_request_id_scheduling_requests"),
+            ondelete="CASCADE",
+        ),
+        sa.PrimaryKeyConstraint("id", name=op.f("pk_scheduling_participants")),
+    )
+    op.create_index(op.f("ix_scheduling_participants_deleted_at"), "scheduling_participants", ["deleted_at"], unique=False)
+    op.create_index(op.f("ix_scheduling_participants_email"), "scheduling_participants", ["email"], unique=False)
+    op.create_index(op.f("ix_scheduling_participants_last_invited_at"), "scheduling_participants", ["last_invited_at"], unique=False)
+    op.create_index(op.f("ix_scheduling_participants_participant_type"), "scheduling_participants", ["participant_type"], unique=False)
+    op.create_index(op.f("ix_scheduling_participants_poll_invitation_id"), "scheduling_participants", ["poll_invitation_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_participants_request_id"), "scheduling_participants", ["request_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_participants_responded_at"), "scheduling_participants", ["responded_at"], unique=False)
+    op.create_index(op.f("ix_scheduling_participants_respondent_id"), "scheduling_participants", ["respondent_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_participants_status"), "scheduling_participants", ["status"], unique=False)
+    op.create_index(op.f("ix_scheduling_participants_tenant_id"), "scheduling_participants", ["tenant_id"], unique=False)
+    op.create_index("ix_scheduling_participants_request", "scheduling_participants", ["tenant_id", "request_id"], unique=False)
+    op.create_index("ix_scheduling_participants_request_email", "scheduling_participants", ["request_id", "email"], unique=False)
+    op.create_index(
+        "ix_scheduling_participants_request_respondent",
+        "scheduling_participants",
+        ["request_id", "respondent_id"],
+        unique=False,
+    )
+
+
+def downgrade() -> None:
+    op.drop_table("scheduling_participants")
+    op.drop_table("scheduling_candidate_slots")
+    op.drop_table("scheduling_requests")

src/govoplan_scheduling/backend/migrations/versions/4d5e6f7a8b9c_v018_scheduling_calendar_notifications.py

@@ -0,0 +1,74 @@
+"""v0.1.8 scheduling calendar integration and notification outbox
+
+Revision ID: 4d5e6f7a8b9c
+Revises: 3c4d5e6f7a8b
+Create Date: 2026-07-12 00:00:00.000000
+"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "4d5e6f7a8b9c"
+down_revision = "3c4d5e6f7a8b"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column("scheduling_candidate_slots", sa.Column("freebusy_checked_at", sa.DateTime(timezone=True), nullable=True))
+    op.add_column("scheduling_candidate_slots", sa.Column("freebusy_status", sa.String(length=40), nullable=True))
+    op.add_column("scheduling_candidate_slots", sa.Column("freebusy_conflicts", sa.JSON(), nullable=False, server_default="[]"))
+    op.add_column("scheduling_candidate_slots", sa.Column("tentative_hold_event_id", sa.String(length=36), nullable=True))
+    op.create_index(op.f("ix_scheduling_candidate_slots_freebusy_status"), "scheduling_candidate_slots", ["freebusy_status"], unique=False)
+    op.create_index(
+        op.f("ix_scheduling_candidate_slots_tentative_hold_event_id"),
+        "scheduling_candidate_slots",
+        ["tentative_hold_event_id"],
+        unique=False,
+    )
+
+    op.create_table(
+        "scheduling_notifications",
+        sa.Column("id", sa.String(length=36), nullable=False),
+        sa.Column("tenant_id", sa.String(length=36), nullable=False),
+        sa.Column("request_id", sa.String(length=36), nullable=False),
+        sa.Column("participant_id", sa.String(length=36), nullable=True),
+        sa.Column("event_kind", sa.String(length=40), nullable=False),
+        sa.Column("channel", sa.String(length=40), nullable=False),
+        sa.Column("recipient", sa.String(length=500), nullable=True),
+        sa.Column("status", sa.String(length=40), nullable=False),
+        sa.Column("payload", sa.JSON(), nullable=False),
+        sa.Column("error", sa.Text(), nullable=True),
+        sa.Column("sent_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("metadata", sa.JSON(), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+        sa.ForeignKeyConstraint(
+            ["request_id"],
+            ["scheduling_requests.id"],
+            name=op.f("fk_scheduling_notifications_request_id_scheduling_requests"),
+            ondelete="CASCADE",
+        ),
+        sa.PrimaryKeyConstraint("id", name=op.f("pk_scheduling_notifications")),
+    )
+    op.create_index(op.f("ix_scheduling_notifications_channel"), "scheduling_notifications", ["channel"], unique=False)
+    op.create_index(op.f("ix_scheduling_notifications_event_kind"), "scheduling_notifications", ["event_kind"], unique=False)
+    op.create_index(op.f("ix_scheduling_notifications_participant_id"), "scheduling_notifications", ["participant_id"], unique=False)
+    op.create_index(op.f("ix_scheduling_notifications_recipient"), "scheduling_notifications", ["recipient"], unique=False)
+    op.create_index(op.f("ix_scheduling_notifications_request_id"), "scheduling_notifications", ["request_id"], unique=False)
+    op.create_index("ix_scheduling_notifications_request_status", "scheduling_notifications", ["request_id", "status"], unique=False)
+    op.create_index(op.f("ix_scheduling_notifications_status"), "scheduling_notifications", ["status"], unique=False)
+    op.create_index(op.f("ix_scheduling_notifications_tenant_id"), "scheduling_notifications", ["tenant_id"], unique=False)
+    op.create_index("ix_scheduling_notifications_tenant_status", "scheduling_notifications", ["tenant_id", "status"], unique=False)
+
+
+def downgrade() -> None:
+    op.drop_table("scheduling_notifications")
+    op.drop_index(op.f("ix_scheduling_candidate_slots_tentative_hold_event_id"), table_name="scheduling_candidate_slots")
+    op.drop_index(op.f("ix_scheduling_candidate_slots_freebusy_status"), table_name="scheduling_candidate_slots")
+    op.drop_column("scheduling_candidate_slots", "tentative_hold_event_id")
+    op.drop_column("scheduling_candidate_slots", "freebusy_conflicts")
+    op.drop_column("scheduling_candidate_slots", "freebusy_status")
+    op.drop_column("scheduling_candidate_slots", "freebusy_checked_at")

src/govoplan_scheduling/backend/migrations/versions/__init__.py

@@ -0,0 +1 @@
+from __future__ import annotations

src/govoplan_scheduling/backend/router.py

@@ -0,0 +1,372 @@
+from __future__ import annotations
+
+import dataclasses
+from typing import Any
+
+from fastapi import APIRouter, Depends, HTTPException, Query, status
+from sqlalchemy.orm import Session
+
+from govoplan_core.auth import ApiPrincipal, get_api_principal, has_scope
+from govoplan_core.db.session import get_session
+from govoplan_poll.backend.schemas import PollResultSummaryResponse
+from govoplan_scheduling.backend.manifest import READ_SCOPE, WRITE_SCOPE
+from govoplan_scheduling.backend.schemas import (
+    SchedulingAddressLookupCandidate,
+    SchedulingAddressLookupResponse,
+    SchedulingCalendarActionResponse,
+    SchedulingDecisionRequest,
+    SchedulingNotificationCreateRequest,
+    SchedulingNotificationListResponse,
+    SchedulingNotificationResponse,
+    SchedulingRequestCreateRequest,
+    SchedulingRequestListResponse,
+    SchedulingRequestResponse,
+    SchedulingRequestUpdateRequest,
+    SchedulingStatusResponse,
+    SchedulingSummaryResponse,
+)
+from govoplan_scheduling.backend.runtime import get_registry
+from govoplan_scheduling.backend.service import (
+    SchedulingError,
+    cancel_scheduling_request,
+    close_scheduling_request,
+    create_final_calendar_event,
+    create_scheduling_notification_jobs,
+    create_scheduling_request,
+    create_tentative_calendar_holds,
+    decide_scheduling_request,
+    evaluate_calendar_freebusy,
+    get_scheduling_request,
+    list_scheduling_notifications,
+    list_scheduling_requests,
+    open_scheduling_request,
+    scheduling_notification_response,
+    scheduling_request_response,
+    scheduling_request_summary,
+    update_scheduling_request,
+)
+
+
+router = APIRouter(prefix="/scheduling", tags=["scheduling"])
+CAPABILITY_ADDRESSES_LOOKUP = "addresses.lookup"
+
+
+def _capability_payload(value: object) -> dict[str, Any]:
+    if dataclasses.is_dataclass(value):
+        return dataclasses.asdict(value)
+    if isinstance(value, dict):
+        return dict(value)
+    payload: dict[str, Any] = {}
+    for key in (
+        "contact_id",
+        "address_book_id",
+        "display_name",
+        "email",
+        "email_label",
+        "organization",
+        "role_title",
+        "tags",
+        "source_kind",
+        "source_ref",
+        "source_revision",
+        "provenance",
+    ):
+        if hasattr(value, key):
+            payload[key] = getattr(value, key)
+    return payload
+
+
+def _registry_capability(name: str) -> object | None:
+    registry = get_registry()
+    if registry is None or not hasattr(registry, "has_capability") or not registry.has_capability(name):
+        return None
+    return registry.capability(name)
+
+
+def _require_scope(principal: ApiPrincipal, scope: str) -> None:
+    if not has_scope(principal, scope):
+        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail=f"Missing scope: {scope}")
+
+
+def _scheduling_http_error(exc: SchedulingError) -> HTTPException:
+    if str(exc) == "Scheduling request not found":
+        return HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(exc))
+    return HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(exc))
+
+
+def _request_response(request, *, invitation_tokens: dict[str, str] | None = None) -> SchedulingRequestResponse:
+    return SchedulingRequestResponse.model_validate(
+        scheduling_request_response(request, invitation_tokens=invitation_tokens)
+    )
+
+
+@router.get("/address-lookup", response_model=SchedulingAddressLookupResponse)
+def api_lookup_scheduling_addresses(
+    query: str = Query(min_length=1),
+    limit: int = Query(default=25, ge=1, le=100),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingAddressLookupResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    capability = _registry_capability(CAPABILITY_ADDRESSES_LOOKUP)
+    if capability is None or not hasattr(capability, "lookup"):
+        return SchedulingAddressLookupResponse(available=False, candidates=[])
+    candidates = getattr(capability, "lookup")(session, principal, query=query, limit=limit)
+    return SchedulingAddressLookupResponse(
+        available=True,
+        candidates=[SchedulingAddressLookupCandidate.model_validate(_capability_payload(candidate)) for candidate in candidates],
+    )
+
+
+@router.get("/requests", response_model=SchedulingRequestListResponse)
+def api_list_scheduling_requests(
+    status_filter: str | None = Query(default=None, alias="status"),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingRequestListResponse:
+    _require_scope(principal, READ_SCOPE)
+    requests = list_scheduling_requests(session, tenant_id=principal.tenant_id, status=status_filter)
+    return SchedulingRequestListResponse(requests=[_request_response(request) for request in requests])
+
+
+@router.post("/requests", response_model=SchedulingRequestResponse, status_code=status.HTTP_201_CREATED)
+def api_create_scheduling_request(
+    payload: SchedulingRequestCreateRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingRequestResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    try:
+        request, invitation_tokens = create_scheduling_request(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.account_id,
+            payload=payload,
+        )
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    return _request_response(request, invitation_tokens=invitation_tokens)
+
+
+@router.get("/requests/{request_id}", response_model=SchedulingRequestResponse)
+def api_get_scheduling_request(
+    request_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingRequestResponse:
+    _require_scope(principal, READ_SCOPE)
+    try:
+        return _request_response(get_scheduling_request(session, tenant_id=principal.tenant_id, request_id=request_id))
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+
+
+@router.patch("/requests/{request_id}", response_model=SchedulingRequestResponse)
+def api_update_scheduling_request(
+    request_id: str,
+    payload: SchedulingRequestUpdateRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingRequestResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    try:
+        return _request_response(
+            update_scheduling_request(session, tenant_id=principal.tenant_id, request_id=request_id, payload=payload)
+        )
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+
+
+@router.post("/requests/{request_id}/open", response_model=SchedulingStatusResponse)
+def api_open_scheduling_request(
+    request_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingStatusResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    try:
+        request = open_scheduling_request(session, tenant_id=principal.tenant_id, request_id=request_id)
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    return SchedulingStatusResponse(request=_request_response(request))
+
+
+@router.post("/requests/{request_id}/close", response_model=SchedulingStatusResponse)
+def api_close_scheduling_request(
+    request_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingStatusResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    try:
+        request = close_scheduling_request(session, tenant_id=principal.tenant_id, request_id=request_id)
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    return SchedulingStatusResponse(request=_request_response(request))
+
+
+@router.post("/requests/{request_id}/decide", response_model=SchedulingStatusResponse)
+def api_decide_scheduling_request(
+    request_id: str,
+    payload: SchedulingDecisionRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingStatusResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    try:
+        request = decide_scheduling_request(
+            session,
+            tenant_id=principal.tenant_id,
+            request_id=request_id,
+            payload=payload,
+            user_id=principal.account_id,
+        )
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    return SchedulingStatusResponse(request=_request_response(request))
+
+
+@router.post("/requests/{request_id}/calendar/freebusy", response_model=SchedulingCalendarActionResponse)
+def api_evaluate_calendar_freebusy(
+    request_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingCalendarActionResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    try:
+        request, warnings = evaluate_calendar_freebusy(session, tenant_id=principal.tenant_id, request_id=request_id)
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    return SchedulingCalendarActionResponse(
+        request=_request_response(request),
+        updated_slot_ids=[slot.id for slot in request.slots if slot.freebusy_checked_at is not None],
+        warnings=warnings,
+    )
+
+
+@router.post("/requests/{request_id}/calendar/holds", response_model=SchedulingCalendarActionResponse)
+def api_create_tentative_calendar_holds(
+    request_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingCalendarActionResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    try:
+        request, created_event_ids, warnings = create_tentative_calendar_holds(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.account_id,
+            request_id=request_id,
+        )
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    return SchedulingCalendarActionResponse(
+        request=_request_response(request),
+        created_event_ids=created_event_ids,
+        updated_slot_ids=[slot.id for slot in request.slots if slot.tentative_hold_event_id in created_event_ids],
+        warnings=warnings,
+    )
+
+
+@router.post("/requests/{request_id}/calendar/event", response_model=SchedulingCalendarActionResponse)
+def api_create_final_calendar_event(
+    request_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingCalendarActionResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    try:
+        request, event_id, warnings = create_final_calendar_event(
+            session,
+            tenant_id=principal.tenant_id,
+            user_id=principal.account_id,
+            request_id=request_id,
+        )
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    return SchedulingCalendarActionResponse(
+        request=_request_response(request),
+        created_event_ids=[event_id] if event_id else [],
+        warnings=warnings,
+    )
+
+
+@router.post("/requests/{request_id}/cancel", response_model=SchedulingStatusResponse)
+def api_cancel_scheduling_request(
+    request_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingStatusResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    try:
+        request = cancel_scheduling_request(session, tenant_id=principal.tenant_id, request_id=request_id)
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    return SchedulingStatusResponse(request=_request_response(request))
+
+
+@router.get("/requests/{request_id}/summary", response_model=SchedulingSummaryResponse)
+def api_scheduling_summary(
+    request_id: str,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingSummaryResponse:
+    _require_scope(principal, READ_SCOPE)
+    try:
+        request = get_scheduling_request(session, tenant_id=principal.tenant_id, request_id=request_id)
+        summary = scheduling_request_summary(session, tenant_id=principal.tenant_id, request_id=request_id)
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    return SchedulingSummaryResponse(
+        request=_request_response(request),
+        poll_summary=PollResultSummaryResponse.model_validate(summary),
+    )
+
+
+@router.get("/notifications", response_model=SchedulingNotificationListResponse)
+def api_list_scheduling_notifications(
+    request_id: str | None = None,
+    status_filter: str | None = Query(default=None, alias="status"),
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingNotificationListResponse:
+    _require_scope(principal, READ_SCOPE)
+    notifications = list_scheduling_notifications(
+        session,
+        tenant_id=principal.tenant_id,
+        request_id=request_id,
+        status=status_filter,
+    )
+    return SchedulingNotificationListResponse(
+        notifications=[
+            SchedulingNotificationResponse.model_validate(scheduling_notification_response(notification))
+            for notification in notifications
+        ]
+    )
+
+
+@router.post("/requests/{request_id}/notifications", response_model=SchedulingNotificationListResponse)
+def api_create_scheduling_notifications(
+    request_id: str,
+    payload: SchedulingNotificationCreateRequest,
+    session: Session = Depends(get_session),
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> SchedulingNotificationListResponse:
+    _require_scope(principal, WRITE_SCOPE)
+    try:
+        notifications = create_scheduling_notification_jobs(
+            session,
+            tenant_id=principal.tenant_id,
+            request_id=request_id,
+            event_kind=payload.event_kind,
+            channel=payload.channel,
+            metadata=payload.metadata,
+        )
+    except SchedulingError as exc:
+        raise _scheduling_http_error(exc) from exc
+    return SchedulingNotificationListResponse(
+        notifications=[
+            SchedulingNotificationResponse.model_validate(scheduling_notification_response(notification))
+            for notification in notifications
+        ]
+    )

src/govoplan_scheduling/backend/runtime.py

@@ -0,0 +1,20 @@
+from __future__ import annotations
+
+_runtime_registry: object | None = None
+_runtime_settings: object | None = None
+
+
+def configure_runtime(*, registry: object | None = None, settings: object | None = None) -> None:
+    global _runtime_registry, _runtime_settings
+    if registry is not None:
+        _runtime_registry = registry
+    if settings is not None:
+        _runtime_settings = settings
+
+
+def get_registry() -> object | None:
+    return _runtime_registry
+
+
+def get_settings() -> object | None:
+    return _runtime_settings

src/govoplan_scheduling/backend/schemas.py

@@ -0,0 +1,224 @@
+from __future__ import annotations
+
+from datetime import datetime
+from typing import Any, Literal
+
+from pydantic import BaseModel, ConfigDict, Field, model_validator
+
+from govoplan_poll.backend.schemas import PollResultSummaryResponse
+
+
+SchedulingStatus = Literal["draft", "collecting", "closed", "decided", "handed_off", "cancelled", "archived"]
+SchedulingParticipantType = Literal["internal", "external", "resource"]
+SchedulingParticipantStatus = Literal["draft", "invited", "responded", "declined", "removed"]
+SchedulingResultVisibility = Literal["organizer", "after_response", "after_close", "public"]
+
+
+class SchedulingCalendarPreferences(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    enabled: bool = False
+    calendar_id: str | None = Field(default=None, max_length=36)
+    freebusy_enabled: bool = False
+    tentative_holds_enabled: bool = False
+    create_event_on_decision: bool = False
+
+
+class SchedulingCandidateSlotInput(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    label: str | None = Field(default=None, max_length=500)
+    description: str | None = None
+    start_at: datetime
+    end_at: datetime
+    timezone: str | None = Field(default=None, max_length=100)
+    location: str | None = Field(default=None, max_length=500)
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+    @model_validator(mode="after")
+    def validate_range(self) -> "SchedulingCandidateSlotInput":
+        if self.end_at <= self.start_at:
+            raise ValueError("end_at must be after start_at")
+        return self
+
+
+class SchedulingParticipantInput(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    respondent_id: str | None = Field(default=None, max_length=255)
+    display_name: str | None = Field(default=None, max_length=500)
+    email: str | None = Field(default=None, max_length=320)
+    participant_type: SchedulingParticipantType = "external"
+    required: bool = True
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+
+class SchedulingRequestCreateRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    title: str = Field(min_length=1, max_length=500)
+    description: str | None = None
+    location: str | None = Field(default=None, max_length=500)
+    timezone: str = Field(default="UTC", max_length=100)
+    status: Literal["draft", "collecting"] = "draft"
+    deadline_at: datetime | None = None
+    allow_external_participants: bool = True
+    allow_participant_updates: bool = True
+    result_visibility: SchedulingResultVisibility = "after_close"
+    calendar: SchedulingCalendarPreferences = Field(default_factory=SchedulingCalendarPreferences)
+    slots: list[SchedulingCandidateSlotInput] = Field(default_factory=list, min_length=1)
+    participants: list[SchedulingParticipantInput] = Field(default_factory=list)
+    create_participant_invitations: bool = True
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+
+class SchedulingRequestUpdateRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    title: str | None = Field(default=None, min_length=1, max_length=500)
+    description: str | None = None
+    location: str | None = Field(default=None, max_length=500)
+    deadline_at: datetime | None = None
+    allow_external_participants: bool | None = None
+    allow_participant_updates: bool | None = None
+    result_visibility: SchedulingResultVisibility | None = None
+    calendar: SchedulingCalendarPreferences | None = None
+    metadata: dict[str, Any] | None = None
+
+
+class SchedulingCandidateSlotResponse(BaseModel):
+    id: str
+    poll_option_id: str | None = None
+    label: str
+    description: str | None = None
+    start_at: datetime
+    end_at: datetime
+    timezone: str
+    location: str | None = None
+    position: int
+    freebusy_checked_at: datetime | None = None
+    freebusy_status: str | None = None
+    freebusy_conflicts: list[dict[str, Any]] = Field(default_factory=list)
+    tentative_hold_event_id: str | None = None
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+
+class SchedulingParticipantResponse(BaseModel):
+    id: str
+    respondent_id: str | None = None
+    display_name: str | None = None
+    email: str | None = None
+    participant_type: str
+    required: bool
+    status: str
+    poll_invitation_id: str | None = None
+    invitation_token: str | None = None
+    last_invited_at: datetime | None = None
+    responded_at: datetime | None = None
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+
+class SchedulingRequestResponse(BaseModel):
+    id: str
+    tenant_id: str
+    title: str
+    description: str | None = None
+    location: str | None = None
+    timezone: str
+    status: str
+    poll_id: str | None = None
+    selected_slot_id: str | None = None
+    organizer_user_id: str | None = None
+    deadline_at: datetime | None = None
+    allow_external_participants: bool
+    allow_participant_updates: bool
+    result_visibility: str
+    calendar_integration_enabled: bool
+    calendar_id: str | None = None
+    calendar_freebusy_enabled: bool
+    calendar_hold_enabled: bool
+    create_calendar_event_on_decision: bool
+    calendar_event_id: str | None = None
+    handed_off_at: datetime | None = None
+    cancelled_at: datetime | None = None
+    created_at: datetime
+    updated_at: datetime
+    metadata: dict[str, Any] = Field(default_factory=dict)
+    slots: list[SchedulingCandidateSlotResponse] = Field(default_factory=list)
+    participants: list[SchedulingParticipantResponse] = Field(default_factory=list)
+
+
+class SchedulingRequestListResponse(BaseModel):
+    requests: list[SchedulingRequestResponse] = Field(default_factory=list)
+
+
+class SchedulingStatusResponse(BaseModel):
+    request: SchedulingRequestResponse
+
+
+class SchedulingDecisionRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    slot_id: str | None = None
+    poll_option_id: str | None = None
+    handoff_to_calendar: bool | None = None
+
+
+class SchedulingSummaryResponse(BaseModel):
+    request: SchedulingRequestResponse
+    poll_summary: PollResultSummaryResponse
+
+
+class SchedulingCalendarActionResponse(BaseModel):
+    request: SchedulingRequestResponse
+    created_event_ids: list[str] = Field(default_factory=list)
+    updated_slot_ids: list[str] = Field(default_factory=list)
+    warnings: list[str] = Field(default_factory=list)
+
+
+class SchedulingNotificationResponse(BaseModel):
+    id: str
+    request_id: str
+    participant_id: str | None = None
+    event_kind: str
+    channel: str
+    recipient: str | None = None
+    status: str
+    payload: dict[str, Any] = Field(default_factory=dict)
+    error: str | None = None
+    sent_at: datetime | None = None
+    created_at: datetime
+    updated_at: datetime
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+
+class SchedulingNotificationListResponse(BaseModel):
+    notifications: list[SchedulingNotificationResponse] = Field(default_factory=list)
+
+
+class SchedulingNotificationCreateRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    event_kind: Literal["invitation", "reminder", "decision", "cancellation"]
+    channel: str = Field(default="mail", max_length=40)
+    metadata: dict[str, Any] = Field(default_factory=dict)
+
+
+class SchedulingAddressLookupCandidate(BaseModel):
+    contact_id: str
+    address_book_id: str
+    display_name: str
+    email: str | None = None
+    email_label: str | None = None
+    organization: str | None = None
+    role_title: str | None = None
+    tags: list[str] = Field(default_factory=list)
+    source_kind: str = "local"
+    source_ref: str | None = None
+    source_revision: str | None = None
+    provenance: dict[str, Any] = Field(default_factory=dict)
+
+
+class SchedulingAddressLookupResponse(BaseModel):
+    available: bool = False
+    candidates: list[SchedulingAddressLookupCandidate] = Field(default_factory=list)

src/govoplan_scheduling/backend/service.py

@@ -0,0 +1,966 @@
+from __future__ import annotations
+
+from datetime import datetime, timezone
+from typing import Any
+
+from sqlalchemy.orm import Session
+
+from govoplan_core.core.notifications import NotificationDispatchRequest, notification_dispatch_provider
+from govoplan_core.db.base import utcnow
+from govoplan_poll.backend.schemas import PollCreateRequest, PollDecisionRequest, PollInvitationCreateRequest, PollOptionInput
+from govoplan_poll.backend.db.models import PollResponse
+from govoplan_poll.backend.service import (
+    PollError,
+    close_poll,
+    create_poll,
+    create_poll_invitation,
+    decide_poll,
+    get_poll,
+    open_poll,
+    poll_result_summary_by_id,
+)
+from govoplan_scheduling.backend.db.models import SchedulingCandidateSlot, SchedulingNotification, SchedulingParticipant, SchedulingRequest
+from govoplan_scheduling.backend.schemas import (
+    SchedulingDecisionRequest,
+    SchedulingRequestCreateRequest,
+    SchedulingRequestUpdateRequest,
+)
+from govoplan_scheduling.backend.runtime import get_registry
+
+
+class SchedulingError(ValueError):
+    pass
+
+
+WORKFLOW_DRAFT = "draft"
+WORKFLOW_COLLECTING = "collecting_availability"
+WORKFLOW_CLOSED = "availability_closed"
+WORKFLOW_DECIDED = "slot_decided"
+WORKFLOW_HANDED_OFF = "handed_off"
+WORKFLOW_CANCELLED = "cancelled"
+NOTIFICATION_KINDS = {"invitation", "reminder", "decision", "cancellation"}
+
+
+def response_datetime(value: datetime | None) -> datetime | None:
+    if value is None:
+        return None
+    if value.tzinfo is None:
+        return value.replace(tzinfo=timezone.utc)
+    return value.astimezone(timezone.utc)
+
+
+def _jsonable(value: Any) -> Any:
+    if isinstance(value, datetime):
+        normalized = response_datetime(value)
+        return normalized.isoformat() if normalized else None
+    if isinstance(value, dict):
+        return {str(key): _jsonable(item) for key, item in value.items()}
+    if isinstance(value, list):
+        return [_jsonable(item) for item in value]
+    return value
+
+
+def _now() -> datetime:
+    return utcnow()
+
+
+def _slot_label(start_at: datetime, end_at: datetime, *, timezone_name: str) -> str:
+    return f"{response_datetime(start_at).isoformat()} - {response_datetime(end_at).isoformat()} ({timezone_name})"
+
+
+def _workflow_steps(state: str) -> list[dict[str, Any]]:
+    order = [
+        ("draft", "Draft"),
+        ("collecting_availability", "Collect availability"),
+        ("availability_closed", "Close poll"),
+        ("slot_decided", "Choose slot"),
+        ("handed_off", "Hand off"),
+    ]
+    active_index = next((index for index, (step_id, _label) in enumerate(order) if step_id == state), 0)
+    steps: list[dict[str, Any]] = []
+    for index, (step_id, label) in enumerate(order):
+        if step_id == state:
+            status = "active"
+        elif index < active_index:
+            status = "done"
+        else:
+            status = "pending"
+        steps.append({"id": step_id, "label": label, "status": status})
+    if state == WORKFLOW_CANCELLED:
+        steps.append({"id": "cancelled", "label": "Cancelled", "status": "active"})
+    return steps
+
+
+def _poll_status_for_request(status: str) -> str:
+    if status == "collecting":
+        return "open"
+    return "draft"
+
+
+def _active_slots(request: SchedulingRequest) -> list[SchedulingCandidateSlot]:
+    return [slot for slot in request.slots if slot.deleted_at is None]
+
+
+def _active_participants(request: SchedulingRequest) -> list[SchedulingParticipant]:
+    return [participant for participant in request.participants if participant.deleted_at is None]
+
+
+def _poll_option_inputs(request: SchedulingRequest) -> list[PollOptionInput]:
+    options: list[PollOptionInput] = []
+    for slot in _active_slots(request):
+        options.append(
+            PollOptionInput(
+                key=f"slot-{slot.position + 1}",
+                label=slot.label,
+                description=slot.description,
+                value={
+                    "slot_id": slot.id,
+                    "start_at": response_datetime(slot.start_at).isoformat(),
+                    "end_at": response_datetime(slot.end_at).isoformat(),
+                    "timezone": slot.timezone,
+                    "location": slot.location,
+                },
+                metadata=slot.metadata_ or {},
+            )
+        )
+    return options
+
+
+def _poll_workflow_state(request: SchedulingRequest) -> str:
+    return {
+        "draft": WORKFLOW_DRAFT,
+        "collecting": WORKFLOW_COLLECTING,
+        "closed": WORKFLOW_CLOSED,
+        "decided": WORKFLOW_DECIDED,
+        "handed_off": WORKFLOW_HANDED_OFF,
+        "cancelled": WORKFLOW_CANCELLED,
+    }.get(request.status, WORKFLOW_DRAFT)
+
+
+def _sync_poll_workflow(session: Session, *, tenant_id: str, request: SchedulingRequest) -> None:
+    if request.poll_id is None:
+        return
+    poll = get_poll(session, tenant_id=tenant_id, poll_id=request.poll_id)
+    state = _poll_workflow_state(request)
+    poll.workflow_state = state
+    poll.workflow_steps = _workflow_steps(state)
+    poll.context_module = "scheduling"
+    poll.context_resource_type = "scheduling_request"
+    poll.context_resource_id = request.id
+
+
+def _set_calendar_preferences(request: SchedulingRequest, payload) -> None:
+    calendar = payload.calendar
+    request.calendar_integration_enabled = calendar.enabled
+    request.calendar_id = calendar.calendar_id
+    request.calendar_freebusy_enabled = calendar.freebusy_enabled
+    request.calendar_hold_enabled = calendar.tentative_holds_enabled
+    request.create_calendar_event_on_decision = calendar.create_event_on_decision
+    if not calendar.enabled:
+        request.calendar_freebusy_enabled = False
+        request.calendar_hold_enabled = False
+        request.create_calendar_event_on_decision = False
+
+
+def _calendar_api():
+    try:
+        from govoplan_calendar.backend.schemas import CalendarEventCreateRequest
+        from govoplan_calendar.backend.service import CalendarError, create_event, list_freebusy
+    except ModuleNotFoundError as exc:
+        raise SchedulingError("Calendar module is not installed") from exc
+    return CalendarEventCreateRequest, CalendarError, create_event, list_freebusy
+
+
+def _require_calendar_enabled(request: SchedulingRequest) -> None:
+    if not request.calendar_integration_enabled:
+        raise SchedulingError("Calendar integration is not enabled for this scheduling request")
+    if not request.calendar_id:
+        raise SchedulingError("Scheduling request has no target calendar")
+
+
+def _attendees_for_calendar_event(request: SchedulingRequest) -> list[dict[str, Any]]:
+    attendees: list[dict[str, Any]] = []
+    for participant in _active_participants(request):
+        if not participant.email and not participant.display_name:
+            continue
+        attendees.append(
+            {
+                "email": participant.email,
+                "name": participant.display_name,
+                "required": participant.required,
+                "participant_id": participant.id,
+                "participant_type": participant.participant_type,
+            }
+        )
+    return attendees
+
+
+def _calendar_event_payload(
+    request: SchedulingRequest,
+    slot: SchedulingCandidateSlot,
+    *,
+    status: str,
+    summary_prefix: str | None = None,
+) -> Any:
+    CalendarEventCreateRequest, _CalendarError, _create_event, _list_freebusy = _calendar_api()
+    summary = f"{summary_prefix}: {request.title}" if summary_prefix else request.title
+    return CalendarEventCreateRequest(
+        calendar_id=request.calendar_id,
+        summary=summary,
+        description=request.description,
+        location=slot.location or request.location,
+        status=status,
+        transparency="OPAQUE",
+        classification="PRIVATE" if status == "TENTATIVE" else "PUBLIC",
+        start_at=slot.start_at,
+        end_at=slot.end_at,
+        timezone=slot.timezone,
+        attendees=_attendees_for_calendar_event(request),
+        categories=["GovOPlaN", "Scheduling"],
+        related_to=[{"reltype": "SIBLING", "uid": request.poll_id, "type": "poll"}] if request.poll_id else [],
+        metadata={
+            "scheduling_request_id": request.id,
+            "scheduling_slot_id": slot.id,
+            "poll_id": request.poll_id,
+            "kind": "tentative_hold" if status == "TENTATIVE" else "scheduled_meeting",
+        },
+    )
+
+
+def evaluate_calendar_freebusy(
+    session: Session,
+    *,
+    tenant_id: str,
+    request_id: str,
+) -> tuple[SchedulingRequest, list[str]]:
+    request = get_scheduling_request(session, tenant_id=tenant_id, request_id=request_id)
+    _require_calendar_enabled(request)
+    if not request.calendar_freebusy_enabled:
+        raise SchedulingError("Calendar free/busy checks are not enabled for this scheduling request")
+    _CalendarEventCreateRequest, CalendarError, _create_event, list_freebusy = _calendar_api()
+    warnings: list[str] = []
+    for slot in _active_slots(request):
+        try:
+            conflicts = list_freebusy(
+                session,
+                tenant_id=tenant_id,
+                start_at=slot.start_at,
+                end_at=slot.end_at,
+                calendar_ids=[request.calendar_id] if request.calendar_id else None,
+            )
+        except CalendarError as exc:
+            slot.freebusy_checked_at = _now()
+            slot.freebusy_status = "error"
+            slot.freebusy_conflicts = [{"error": str(exc)}]
+            warnings.append(str(exc))
+            continue
+        slot.freebusy_checked_at = _now()
+        slot.freebusy_conflicts = _jsonable(conflicts)
+        slot.freebusy_status = "busy" if conflicts else "free"
+    session.flush()
+    return request, warnings
+
+
+def create_tentative_calendar_holds(
+    session: Session,
+    *,
+    tenant_id: str,
+    user_id: str | None,
+    request_id: str,
+) -> tuple[SchedulingRequest, list[str], list[str]]:
+    request = get_scheduling_request(session, tenant_id=tenant_id, request_id=request_id)
+    _require_calendar_enabled(request)
+    if not request.calendar_hold_enabled:
+        raise SchedulingError("Tentative calendar holds are not enabled for this scheduling request")
+    _CalendarEventCreateRequest, CalendarError, create_event, _list_freebusy = _calendar_api()
+    created_event_ids: list[str] = []
+    warnings: list[str] = []
+    for slot in _active_slots(request):
+        if slot.tentative_hold_event_id:
+            continue
+        try:
+            event = create_event(
+                session,
+                tenant_id=tenant_id,
+                user_id=user_id,
+                payload=_calendar_event_payload(request, slot, status="TENTATIVE", summary_prefix="Tentative hold"),
+            )
+        except CalendarError as exc:
+            warnings.append(str(exc))
+            continue
+        slot.tentative_hold_event_id = event.id
+        created_event_ids.append(event.id)
+    session.flush()
+    return request, created_event_ids, warnings
+
+
+def create_final_calendar_event(
+    session: Session,
+    *,
+    tenant_id: str,
+    user_id: str | None,
+    request_id: str,
+) -> tuple[SchedulingRequest, str | None, list[str]]:
+    request = get_scheduling_request(session, tenant_id=tenant_id, request_id=request_id)
+    _require_calendar_enabled(request)
+    if not request.create_calendar_event_on_decision:
+        raise SchedulingError("Final calendar event creation is not enabled for this scheduling request")
+    if request.calendar_event_id:
+        return request, request.calendar_event_id, []
+    if not request.selected_slot_id:
+        raise SchedulingError("Scheduling request has no selected slot")
+    slot = _selected_slot(request, slot_id=request.selected_slot_id)
+    _CalendarEventCreateRequest, CalendarError, create_event, _list_freebusy = _calendar_api()
+    try:
+        event = create_event(
+            session,
+            tenant_id=tenant_id,
+            user_id=user_id,
+            payload=_calendar_event_payload(request, slot, status="CONFIRMED"),
+        )
+    except CalendarError as exc:
+        request.metadata_ = {
+            **(request.metadata_ or {}),
+            "calendar_handoff": {"status": "error", "error": str(exc), "slot_id": slot.id, "calendar_id": request.calendar_id},
+        }
+        session.flush()
+        return request, None, [str(exc)]
+    request.calendar_event_id = event.id
+    request.handed_off_at = _now()
+    request.status = "handed_off"
+    request.metadata_ = {
+        **(request.metadata_ or {}),
+        "calendar_handoff": {"status": "created", "event_id": event.id, "slot_id": slot.id, "calendar_id": request.calendar_id},
+    }
+    _sync_poll_workflow(session, tenant_id=tenant_id, request=request)
+    session.flush()
+    return request, event.id, []
+
+
+def create_scheduling_notification_jobs(
+    session: Session,
+    *,
+    tenant_id: str,
+    request_id: str,
+    event_kind: str,
+    channel: str = "mail",
+    metadata: dict[str, Any] | None = None,
+) -> list[SchedulingNotification]:
+    if event_kind not in NOTIFICATION_KINDS:
+        raise SchedulingError(f"Unsupported scheduling notification kind: {event_kind}")
+    request = get_scheduling_request(session, tenant_id=tenant_id, request_id=request_id)
+    notifications: list[SchedulingNotification] = []
+    base_metadata = metadata or {}
+    for participant in _active_participants(request):
+        recipient = participant.email or participant.respondent_id
+        status = "pending" if recipient else "skipped"
+        notification = SchedulingNotification(
+            tenant_id=tenant_id,
+            request_id=request.id,
+            participant_id=participant.id,
+            event_kind=event_kind,
+            channel=channel,
+            recipient=recipient,
+            status=status,
+            payload={
+                "title": request.title,
+                "request_id": request.id,
+                "poll_id": request.poll_id,
+                "participant_id": participant.id,
+                "selected_slot_id": request.selected_slot_id,
+                "calendar_event_id": request.calendar_event_id,
+            },
+            metadata_=dict(base_metadata),
+        )
+        if status == "skipped":
+            notification.error = "Participant has no deliverable recipient address or id"
+        session.add(notification)
+        notifications.append(notification)
+    session.flush()
+    _mirror_scheduling_notifications_to_center(session, request=request, notifications=notifications)
+    return notifications
+
+
+def _mirror_scheduling_notifications_to_center(
+    session: Session,
+    *,
+    request: SchedulingRequest,
+    notifications: list[SchedulingNotification],
+) -> None:
+    provider = notification_dispatch_provider(get_registry())
+    if provider is None:
+        return
+    participants_by_id = {participant.id: participant for participant in _active_participants(request)}
+    for notification in notifications:
+        if notification.status == "skipped":
+            continue
+        participant = participants_by_id.get(notification.participant_id or "")
+        try:
+            response = provider.enqueue_notification(
+                session,
+                _notification_dispatch_request(request=request, participant=participant, notification=notification),
+                enqueue_delivery=True,
+            )
+        except Exception as exc:  # noqa: BLE001 - mirroring must not block scheduling workflow.
+            notification.status = "failed"
+            notification.error = f"Notification center enqueue failed: {exc}"
+            continue
+        notification.metadata_ = {
+            **(notification.metadata_ or {}),
+            "notification_id": response.get("id"),
+            "notification_status": response.get("status"),
+        }
+        if response.get("status") in {"queued", "sending", "sent"}:
+            notification.status = str(response["status"])
+        elif response.get("status") == "skipped":
+            notification.status = "skipped"
+            notification.error = str(response.get("last_error") or "Notification center skipped delivery")
+    session.flush()
+
+
+def _notification_dispatch_request(
+    *,
+    request: SchedulingRequest,
+    participant: SchedulingParticipant | None,
+    notification: SchedulingNotification,
+) -> NotificationDispatchRequest:
+    payload = {
+        **(notification.payload or {}),
+        "scheduling_notification_id": notification.id,
+        "participant": {
+            "id": participant.id,
+            "display_name": participant.display_name,
+            "email": participant.email,
+            "required": participant.required,
+            "participant_type": participant.participant_type,
+        }
+        if participant
+        else None,
+    }
+    return NotificationDispatchRequest(
+        tenant_id=request.tenant_id,
+        source_module="scheduling",
+        source_resource_type="request",
+        source_resource_id=request.id,
+        event_kind=notification.event_kind,
+        channel=notification.channel,
+        recipient=notification.recipient,
+        recipient_type="scheduling_participant",
+        recipient_id=participant.id if participant else notification.participant_id,
+        recipient_label=participant.display_name if participant else None,
+        subject=_notification_subject(request, notification.event_kind),
+        body_text=_notification_body_text(request, participant, notification.event_kind),
+        action_url=f"/scheduling?request_id={request.id}",
+        payload=_jsonable(payload),
+        metadata={
+            **(notification.metadata_ or {}),
+            "scheduling_notification_id": notification.id,
+            "scheduling_request_id": request.id,
+        },
+    )
+
+
+def _notification_subject(request: SchedulingRequest, event_kind: str) -> str:
+    labels = {
+        "invitation": "Scheduling invitation",
+        "reminder": "Scheduling reminder",
+        "decision": "Scheduling decision",
+        "cancellation": "Scheduling cancelled",
+    }
+    return f"{labels.get(event_kind, 'Scheduling update')}: {request.title}"
+
+
+def _notification_body_text(
+    request: SchedulingRequest,
+    participant: SchedulingParticipant | None,
+    event_kind: str,
+) -> str:
+    greeting = f"Hello {participant.display_name}," if participant and participant.display_name else "Hello,"
+    lines = [greeting, "", _notification_body_intro(request, event_kind)]
+    selected_slot = next((slot for slot in _active_slots(request) if slot.id == request.selected_slot_id), None)
+    if selected_slot is not None:
+        lines.append(f"Selected slot: {_slot_label(selected_slot.start_at, selected_slot.end_at, timezone_name=selected_slot.timezone)}")
+    if request.location:
+        lines.append(f"Location: {request.location}")
+    lines.append(f"Scheduling request: {request.title}")
+    return "\n".join(lines)
+
+
+def _notification_body_intro(request: SchedulingRequest, event_kind: str) -> str:
+    if event_kind == "invitation":
+        return f"You are invited to respond to the scheduling poll for {request.title}."
+    if event_kind == "reminder":
+        return f"This is a reminder to respond to the scheduling poll for {request.title}."
+    if event_kind == "decision":
+        return f"A final slot was selected for {request.title}."
+    if event_kind == "cancellation":
+        return f"The scheduling request {request.title} was cancelled."
+    return f"There is an update for {request.title}."
+
+
+def _emit_scheduling_center_notification(
+    session: Session,
+    *,
+    request: SchedulingRequest,
+    event_kind: str,
+    subject: str,
+    body_text: str,
+    participant: SchedulingParticipant | None = None,
+    priority: int = 0,
+) -> None:
+    provider = notification_dispatch_provider(get_registry())
+    if provider is None:
+        return
+    try:
+        provider.enqueue_notification(
+            session,
+            NotificationDispatchRequest(
+                tenant_id=request.tenant_id,
+                source_module="scheduling",
+                source_resource_type="request",
+                source_resource_id=request.id,
+                event_kind=event_kind,
+                channel="inbox",
+                recipient_type="user" if request.organizer_user_id else None,
+                recipient_id=request.organizer_user_id,
+                subject=subject,
+                body_text=body_text,
+                action_url=f"/scheduling?request_id={request.id}",
+                priority=priority,
+                payload=_jsonable(
+                    {
+                        "request_id": request.id,
+                        "poll_id": request.poll_id,
+                        "participant_id": participant.id if participant else None,
+                    }
+                ),
+                metadata={"scheduling_request_id": request.id},
+            ),
+            enqueue_delivery=False,
+        )
+    except Exception:
+        return
+
+
+def list_scheduling_notifications(
+    session: Session,
+    *,
+    tenant_id: str,
+    request_id: str | None = None,
+    status: str | None = None,
+) -> list[SchedulingNotification]:
+    query = session.query(SchedulingNotification).filter(SchedulingNotification.tenant_id == tenant_id)
+    if request_id:
+        query = query.filter(SchedulingNotification.request_id == request_id)
+    if status:
+        query = query.filter(SchedulingNotification.status == status)
+    return query.order_by(SchedulingNotification.created_at.desc(), SchedulingNotification.id.asc()).all()
+
+
+def refresh_participant_response_state(session: Session, *, request: SchedulingRequest) -> None:
+    if request.poll_id is None:
+        return
+    by_invitation_id = {
+        participant.poll_invitation_id: participant
+        for participant in _active_participants(request)
+        if participant.poll_invitation_id is not None
+    }
+    if not by_invitation_id:
+        return
+    responses = (
+        session.query(PollResponse)
+        .filter(PollResponse.tenant_id == request.tenant_id, PollResponse.poll_id == request.poll_id, PollResponse.deleted_at.is_(None))
+        .all()
+    )
+    changed = False
+    for response in responses:
+        invitation_id = (response.metadata_ or {}).get("invitation_id")
+        participant = by_invitation_id.get(invitation_id)
+        if participant is not None and participant.status != "responded":
+            participant.status = "responded"
+            participant.responded_at = response_datetime(response.submitted_at)
+            _emit_scheduling_center_notification(
+                session,
+                request=request,
+                participant=participant,
+                event_kind="scheduling.participant_responded",
+                subject=f"Scheduling response: {request.title}",
+                body_text=f"{participant.display_name or participant.email or 'A participant'} responded to {request.title}.",
+            )
+            changed = True
+    if changed:
+        session.flush()
+
+
+def create_scheduling_request(
+    session: Session,
+    *,
+    tenant_id: str,
+    user_id: str | None,
+    payload: SchedulingRequestCreateRequest,
+) -> tuple[SchedulingRequest, dict[str, str]]:
+    if not payload.allow_external_participants:
+        for participant_input in payload.participants:
+            if participant_input.participant_type == "external":
+                raise SchedulingError("External participants are not allowed for this scheduling request")
+    request = SchedulingRequest(
+        tenant_id=tenant_id,
+        title=payload.title,
+        description=payload.description,
+        location=payload.location,
+        timezone=payload.timezone,
+        status=payload.status,
+        organizer_user_id=user_id,
+        deadline_at=payload.deadline_at,
+        allow_external_participants=payload.allow_external_participants,
+        allow_participant_updates=payload.allow_participant_updates,
+        result_visibility=payload.result_visibility,
+        metadata_=payload.metadata,
+    )
+    _set_calendar_preferences(request, payload)
+    session.add(request)
+    session.flush()
+
+    for position, slot_input in enumerate(payload.slots):
+        timezone_name = slot_input.timezone or payload.timezone
+        slot = SchedulingCandidateSlot(
+            tenant_id=tenant_id,
+            request_id=request.id,
+            label=slot_input.label or _slot_label(slot_input.start_at, slot_input.end_at, timezone_name=timezone_name),
+            description=slot_input.description,
+            start_at=slot_input.start_at,
+            end_at=slot_input.end_at,
+            timezone=timezone_name,
+            location=slot_input.location or payload.location,
+            position=position,
+            metadata_=slot_input.metadata,
+        )
+        session.add(slot)
+    for participant_input in payload.participants:
+        participant = SchedulingParticipant(
+            tenant_id=tenant_id,
+            request_id=request.id,
+            respondent_id=participant_input.respondent_id,
+            display_name=participant_input.display_name,
+            email=participant_input.email,
+            participant_type=participant_input.participant_type,
+            required=participant_input.required,
+            status="draft" if payload.status == "draft" else "invited",
+            metadata_=participant_input.metadata,
+        )
+        session.add(participant)
+    session.flush()
+
+    try:
+        poll = create_poll(
+            session,
+            tenant_id=tenant_id,
+            user_id=user_id,
+            payload=PollCreateRequest(
+                title=payload.title,
+                description=payload.description,
+                kind="availability",
+                status=_poll_status_for_request(payload.status),
+                visibility="unlisted" if payload.allow_external_participants else "tenant",
+                result_visibility=payload.result_visibility,
+                context_module="scheduling",
+                context_resource_type="scheduling_request",
+                context_resource_id=request.id,
+                workflow_state=_poll_workflow_state(request),
+                workflow_steps=_workflow_steps(_poll_workflow_state(request)),
+                allow_anonymous=False,
+                allow_response_update=payload.allow_participant_updates,
+                min_choices=1,
+                max_choices=len(_active_slots(request)),
+                opens_at=None,
+                closes_at=payload.deadline_at,
+                options=_poll_option_inputs(request),
+                metadata={"scheduling_request_id": request.id, "calendar": payload.calendar.model_dump()},
+            ),
+        )
+    except PollError as exc:
+        raise SchedulingError(str(exc)) from exc
+    request.poll_id = poll.id
+    options_by_position = {option.position: option.id for option in poll.options}
+    for slot in _active_slots(request):
+        slot.poll_option_id = options_by_position.get(slot.position)
+
+    invitation_tokens: dict[str, str] = {}
+    if payload.create_participant_invitations:
+        for participant in _active_participants(request):
+            try:
+                invitation, token = create_poll_invitation(
+                    session,
+                    tenant_id=tenant_id,
+                    poll_id=poll.id,
+                    payload=PollInvitationCreateRequest(
+                        respondent_id=participant.respondent_id,
+                        respondent_label=participant.display_name,
+                        email=participant.email,
+                        expires_at=payload.deadline_at,
+                        metadata={"scheduling_request_id": request.id, "scheduling_participant_id": participant.id},
+                    ),
+                )
+            except PollError as exc:
+                raise SchedulingError(str(exc)) from exc
+            participant.poll_invitation_id = invitation.id
+            participant.last_invited_at = _now()
+            participant.status = "invited"
+            invitation_tokens[participant.id] = token
+        create_scheduling_notification_jobs(
+            session,
+            tenant_id=tenant_id,
+            request_id=request.id,
+            event_kind="invitation",
+            metadata={"created_with_request": True},
+        )
+    session.flush()
+    return request, invitation_tokens
+
+
+def list_scheduling_requests(session: Session, *, tenant_id: str, status: str | None = None) -> list[SchedulingRequest]:
+    query = session.query(SchedulingRequest).filter(SchedulingRequest.tenant_id == tenant_id, SchedulingRequest.deleted_at.is_(None))
+    if status:
+        query = query.filter(SchedulingRequest.status == status)
+    return query.order_by(SchedulingRequest.created_at.desc(), SchedulingRequest.title.asc()).all()
+
+
+def get_scheduling_request(session: Session, *, tenant_id: str, request_id: str) -> SchedulingRequest:
+    request = (
+        session.query(SchedulingRequest)
+        .filter(SchedulingRequest.tenant_id == tenant_id, SchedulingRequest.id == request_id, SchedulingRequest.deleted_at.is_(None))
+        .first()
+    )
+    if request is None:
+        raise SchedulingError("Scheduling request not found")
+    return request
+
+
+def update_scheduling_request(
+    session: Session,
+    *,
+    tenant_id: str,
+    request_id: str,
+    payload: SchedulingRequestUpdateRequest,
+) -> SchedulingRequest:
+    request = get_scheduling_request(session, tenant_id=tenant_id, request_id=request_id)
+    if request.status in {"decided", "handed_off", "cancelled", "archived"}:
+        raise SchedulingError("Decided, handed off, cancelled, or archived scheduling requests cannot be edited")
+    for field in ("title", "description", "location", "deadline_at", "allow_external_participants", "allow_participant_updates", "result_visibility"):
+        value = getattr(payload, field)
+        if value is not None:
+            setattr(request, field, value)
+    if payload.calendar is not None:
+        _set_calendar_preferences(request, payload)
+    if payload.metadata is not None:
+        request.metadata_ = payload.metadata
+    session.flush()
+    return request
+
+
+def open_scheduling_request(session: Session, *, tenant_id: str, request_id: str) -> SchedulingRequest:
+    request = get_scheduling_request(session, tenant_id=tenant_id, request_id=request_id)
+    if request.poll_id is None:
+        raise SchedulingError("Scheduling request has no backing poll")
+    try:
+        open_poll(session, tenant_id=tenant_id, poll_id=request.poll_id)
+    except PollError as exc:
+        raise SchedulingError(str(exc)) from exc
+    request.status = "collecting"
+    _sync_poll_workflow(session, tenant_id=tenant_id, request=request)
+    session.flush()
+    return request
+
+
+def close_scheduling_request(session: Session, *, tenant_id: str, request_id: str) -> SchedulingRequest:
+    request = get_scheduling_request(session, tenant_id=tenant_id, request_id=request_id)
+    if request.poll_id is None:
+        raise SchedulingError("Scheduling request has no backing poll")
+    try:
+        close_poll(session, tenant_id=tenant_id, poll_id=request.poll_id)
+    except PollError as exc:
+        raise SchedulingError(str(exc)) from exc
+    request.status = "closed"
+    _sync_poll_workflow(session, tenant_id=tenant_id, request=request)
+    session.flush()
+    return request
+
+
+def decide_scheduling_request(
+    session: Session,
+    *,
+    tenant_id: str,
+    request_id: str,
+    payload: SchedulingDecisionRequest,
+    user_id: str | None = None,
+) -> SchedulingRequest:
+    request = get_scheduling_request(session, tenant_id=tenant_id, request_id=request_id)
+    if request.poll_id is None:
+        raise SchedulingError("Scheduling request has no backing poll")
+    slot = _selected_slot(request, slot_id=payload.slot_id, poll_option_id=payload.poll_option_id)
+    try:
+        decide_poll(
+            session,
+            tenant_id=tenant_id,
+            poll_id=request.poll_id,
+            payload=PollDecisionRequest(option_id=slot.poll_option_id),
+        )
+    except PollError as exc:
+        raise SchedulingError(str(exc)) from exc
+    request.selected_slot_id = slot.id
+    request.status = "decided"
+    should_handoff = payload.handoff_to_calendar or (
+        payload.handoff_to_calendar is None and request.create_calendar_event_on_decision
+    )
+    if should_handoff:
+        if request.calendar_integration_enabled and request.create_calendar_event_on_decision:
+            create_final_calendar_event(session, tenant_id=tenant_id, user_id=user_id, request_id=request.id)
+        else:
+            request.handed_off_at = _now()
+            request.status = "handed_off"
+            request.metadata_ = {
+                **(request.metadata_ or {}),
+                "calendar_handoff": {
+                    "status": "pending",
+                    "reason": "Calendar event creation is not enabled or Calendar is unavailable.",
+                    "slot_id": slot.id,
+                    "calendar_id": request.calendar_id,
+                },
+            }
+    create_scheduling_notification_jobs(session, tenant_id=tenant_id, request_id=request.id, event_kind="decision")
+    _sync_poll_workflow(session, tenant_id=tenant_id, request=request)
+    session.flush()
+    return request
+
+
+def cancel_scheduling_request(session: Session, *, tenant_id: str, request_id: str) -> SchedulingRequest:
+    request = get_scheduling_request(session, tenant_id=tenant_id, request_id=request_id)
+    request.status = "cancelled"
+    request.cancelled_at = _now()
+    if request.poll_id is not None:
+        try:
+            poll = get_poll(session, tenant_id=tenant_id, poll_id=request.poll_id)
+            if poll.status not in {"closed", "decided", "archived"}:
+                close_poll(session, tenant_id=tenant_id, poll_id=request.poll_id)
+        except PollError as exc:
+            raise SchedulingError(str(exc)) from exc
+        _sync_poll_workflow(session, tenant_id=tenant_id, request=request)
+    create_scheduling_notification_jobs(session, tenant_id=tenant_id, request_id=request.id, event_kind="cancellation")
+    session.flush()
+    return request
+
+
+def _selected_slot(
+    request: SchedulingRequest,
+    *,
+    slot_id: str | None = None,
+    poll_option_id: str | None = None,
+) -> SchedulingCandidateSlot:
+    for slot in _active_slots(request):
+        if slot_id is not None and slot.id == slot_id:
+            return slot
+        if poll_option_id is not None and slot.poll_option_id == poll_option_id:
+            return slot
+    raise SchedulingError("Scheduling candidate slot not found")
+
+
+def scheduling_request_summary(session: Session, *, tenant_id: str, request_id: str) -> dict[str, Any]:
+    request = get_scheduling_request(session, tenant_id=tenant_id, request_id=request_id)
+    if request.poll_id is None:
+        raise SchedulingError("Scheduling request has no backing poll")
+    try:
+        summary = poll_result_summary_by_id(session, tenant_id=tenant_id, poll_id=request.poll_id)
+    except PollError as exc:
+        raise SchedulingError(str(exc)) from exc
+    refresh_participant_response_state(session, request=request)
+    return summary
+
+
+def scheduling_slot_response(slot: SchedulingCandidateSlot) -> dict[str, Any]:
+    return {
+        "id": slot.id,
+        "poll_option_id": slot.poll_option_id,
+        "label": slot.label,
+        "description": slot.description,
+        "start_at": response_datetime(slot.start_at),
+        "end_at": response_datetime(slot.end_at),
+        "timezone": slot.timezone,
+        "location": slot.location,
+        "position": slot.position,
+        "freebusy_checked_at": response_datetime(slot.freebusy_checked_at),
+        "freebusy_status": slot.freebusy_status,
+        "freebusy_conflicts": slot.freebusy_conflicts or [],
+        "tentative_hold_event_id": slot.tentative_hold_event_id,
+        "metadata": slot.metadata_ or {},
+    }
+
+
+def scheduling_participant_response(participant: SchedulingParticipant, *, invitation_token: str | None = None) -> dict[str, Any]:
+    return {
+        "id": participant.id,
+        "respondent_id": participant.respondent_id,
+        "display_name": participant.display_name,
+        "email": participant.email,
+        "participant_type": participant.participant_type,
+        "required": participant.required,
+        "status": participant.status,
+        "poll_invitation_id": participant.poll_invitation_id,
+        "invitation_token": invitation_token,
+        "last_invited_at": response_datetime(participant.last_invited_at),
+        "responded_at": response_datetime(participant.responded_at),
+        "metadata": participant.metadata_ or {},
+    }
+
+
+def scheduling_request_response(request: SchedulingRequest, *, invitation_tokens: dict[str, str] | None = None) -> dict[str, Any]:
+    invitation_tokens = invitation_tokens or {}
+    return {
+        "id": request.id,
+        "tenant_id": request.tenant_id,
+        "title": request.title,
+        "description": request.description,
+        "location": request.location,
+        "timezone": request.timezone,
+        "status": request.status,
+        "poll_id": request.poll_id,
+        "selected_slot_id": request.selected_slot_id,
+        "organizer_user_id": request.organizer_user_id,
+        "deadline_at": response_datetime(request.deadline_at),
+        "allow_external_participants": request.allow_external_participants,
+        "allow_participant_updates": request.allow_participant_updates,
+        "result_visibility": request.result_visibility,
+        "calendar_integration_enabled": request.calendar_integration_enabled,
+        "calendar_id": request.calendar_id,
+        "calendar_freebusy_enabled": request.calendar_freebusy_enabled,
+        "calendar_hold_enabled": request.calendar_hold_enabled,
+        "create_calendar_event_on_decision": request.create_calendar_event_on_decision,
+        "calendar_event_id": request.calendar_event_id,
+        "handed_off_at": response_datetime(request.handed_off_at),
+        "cancelled_at": response_datetime(request.cancelled_at),
+        "created_at": response_datetime(request.created_at),
+        "updated_at": response_datetime(request.updated_at),
+        "metadata": request.metadata_ or {},
+        "slots": [scheduling_slot_response(slot) for slot in _active_slots(request)],
+        "participants": [
+            scheduling_participant_response(participant, invitation_token=invitation_tokens.get(participant.id))
+            for participant in _active_participants(request)
+        ],
+    }
+
+
+def scheduling_notification_response(notification: SchedulingNotification) -> dict[str, Any]:
+    return {
+        "id": notification.id,
+        "request_id": notification.request_id,
+        "participant_id": notification.participant_id,
+        "event_kind": notification.event_kind,
+        "channel": notification.channel,
+        "recipient": notification.recipient,
+        "status": notification.status,
+        "payload": notification.payload or {},
+        "error": notification.error,
+        "sent_at": response_datetime(notification.sent_at),
+        "created_at": response_datetime(notification.created_at),
+        "updated_at": response_datetime(notification.updated_at),
+        "metadata": notification.metadata_ or {},
+    }

src/govoplan_scheduling/py.typed

@@ -0,0 +1 @@
+

tests/test_manifest.py

@@ -0,0 +1,33 @@
+from __future__ import annotations
+
+import unittest
+
+from govoplan_core.core.modules import ModuleManifest
+from govoplan_scheduling.backend.manifest import get_manifest
+
+
+class SchedulingManifestTests(unittest.TestCase):
+    def test_manifest_contract(self) -> None:
+        manifest = get_manifest()
+
+        self.assertIsInstance(manifest, ModuleManifest)
+        self.assertEqual(manifest.id, "scheduling")
+        self.assertIn("poll", manifest.dependencies)
+        self.assertNotIn("access", manifest.dependencies)
+        self.assertIn("access", manifest.optional_dependencies)
+        self.assertIn("addresses", manifest.optional_dependencies)
+        self.assertFalse(manifest.required_capabilities)
+        self.assertIn("auth.principalResolver", manifest.optional_capabilities)
+        self.assertIn("evaluation", manifest.optional_dependencies)
+        self.assertIsNotNone(manifest.route_factory)
+        self.assertIsNotNone(manifest.migration_spec)
+        self.assertIsNotNone(manifest.frontend)
+        self.assertIn("poll.availability_matrix", {interface.name for interface in manifest.requires_interfaces})
+        self.assertIn("poll.workflow_context", {interface.name for interface in manifest.requires_interfaces})
+        self.assertIn("poll.signed_participation", {interface.name for interface in manifest.requires_interfaces})
+        self.assertIn("notifications.dispatch", {interface.name for interface in manifest.requires_interfaces})
+        self.assertIn("addresses.lookup", {interface.name for interface in manifest.requires_interfaces})
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_service.py

@@ -0,0 +1,300 @@
+from __future__ import annotations
+
+import unittest
+from datetime import datetime, timedelta, timezone
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import Session, sessionmaker
+
+from govoplan_core.db.base import Base
+from govoplan_core.core.change_sequence import ChangeSequenceEntry
+from govoplan_access.backend.db.models import Account, User
+from govoplan_calendar.backend.db.models import CalendarCollection, CalendarEvent, CalendarSyncSource
+from govoplan_poll.backend.db.models import Poll, PollInvitation, PollOption, PollResponse
+from govoplan_poll.backend.schemas import PollAnswerInput, PollSubmitResponseRequest
+from govoplan_poll.backend.service import get_poll, submit_poll_response_with_token
+from govoplan_scheduling.backend.db.models import SchedulingCandidateSlot, SchedulingNotification, SchedulingParticipant, SchedulingRequest
+from govoplan_scheduling.backend.schemas import (
+    SchedulingCalendarPreferences,
+    SchedulingCandidateSlotInput,
+    SchedulingDecisionRequest,
+    SchedulingParticipantInput,
+    SchedulingRequestCreateRequest,
+)
+from govoplan_scheduling.backend.service import (
+    SchedulingError,
+    close_scheduling_request,
+    create_final_calendar_event,
+    create_scheduling_notification_jobs,
+    create_scheduling_request,
+    create_tentative_calendar_holds,
+    decide_scheduling_request,
+    evaluate_calendar_freebusy,
+    list_scheduling_notifications,
+    scheduling_request_summary,
+)
+
+
+class SchedulingServiceTests(unittest.TestCase):
+    def setUp(self) -> None:
+        self.engine = create_engine("sqlite:///:memory:")
+        Base.metadata.create_all(
+            self.engine,
+            tables=[
+                Poll.__table__,
+                PollOption.__table__,
+                PollResponse.__table__,
+                PollInvitation.__table__,
+                CalendarCollection.__table__,
+                CalendarEvent.__table__,
+                CalendarSyncSource.__table__,
+                ChangeSequenceEntry.__table__,
+                Account.__table__,
+                User.__table__,
+                SchedulingRequest.__table__,
+                SchedulingCandidateSlot.__table__,
+                SchedulingParticipant.__table__,
+                SchedulingNotification.__table__,
+            ],
+        )
+        self.Session = sessionmaker(bind=self.engine)
+        self.session: Session = self.Session()
+
+    def tearDown(self) -> None:
+        self.session.close()
+        Base.metadata.drop_all(
+            self.engine,
+            tables=[
+                SchedulingParticipant.__table__,
+                SchedulingNotification.__table__,
+                SchedulingCandidateSlot.__table__,
+                SchedulingRequest.__table__,
+                User.__table__,
+                Account.__table__,
+                ChangeSequenceEntry.__table__,
+                CalendarSyncSource.__table__,
+                CalendarEvent.__table__,
+                CalendarCollection.__table__,
+                PollInvitation.__table__,
+                PollResponse.__table__,
+                PollOption.__table__,
+                Poll.__table__,
+            ],
+        )
+        self.engine.dispose()
+
+    def _calendar(self) -> CalendarCollection:
+        calendar = CalendarCollection(
+            id="calendar-1",
+            tenant_id="tenant-1",
+            slug="team",
+            name="Team",
+            timezone="Europe/Berlin",
+            owner_type="tenant",
+            visibility="tenant",
+            is_default=True,
+            metadata_={},
+        )
+        self.session.add(calendar)
+        self.session.flush()
+        return calendar
+
+    def _payload(self) -> SchedulingRequestCreateRequest:
+        start = datetime(2026, 7, 20, 9, tzinfo=timezone.utc)
+        return SchedulingRequestCreateRequest(
+            title="Steering group",
+            description="Find a slot",
+            location="Room 1",
+            timezone="Europe/Berlin",
+            status="collecting",
+            deadline_at=start + timedelta(days=3),
+            calendar=SchedulingCalendarPreferences(
+                enabled=True,
+                calendar_id="calendar-1",
+                freebusy_enabled=True,
+                tentative_holds_enabled=True,
+                create_event_on_decision=True,
+            ),
+            slots=[
+                SchedulingCandidateSlotInput(start_at=start, end_at=start + timedelta(hours=1), label="Monday 09:00"),
+                SchedulingCandidateSlotInput(start_at=start + timedelta(days=1), end_at=start + timedelta(days=1, hours=1), label="Tuesday 09:00"),
+            ],
+            participants=[
+                SchedulingParticipantInput(display_name="Alice", email="alice@example.test"),
+                SchedulingParticipantInput(display_name="Bob", email="bob@example.test", required=False),
+            ],
+        )
+
+    def test_create_request_creates_poll_slots_and_signed_invitations(self) -> None:
+        request, tokens = create_scheduling_request(
+            self.session,
+            tenant_id="tenant-1",
+            user_id="user-1",
+            payload=self._payload(),
+        )
+        poll = get_poll(self.session, tenant_id="tenant-1", poll_id=request.poll_id)
+
+        self.assertEqual(request.status, "collecting")
+        self.assertEqual(request.calendar_id, "calendar-1")
+        self.assertEqual(poll.kind, "availability")
+        self.assertEqual(poll.status, "open")
+        self.assertEqual(poll.context_module, "scheduling")
+        self.assertEqual(poll.context_resource_id, request.id)
+        self.assertEqual(len(request.slots), 2)
+        self.assertTrue(all(slot.poll_option_id for slot in request.slots))
+        self.assertEqual(len(tokens), 2)
+        self.assertTrue(all(participant.poll_invitation_id for participant in request.participants))
+
+    def test_signed_response_summary_and_decision_handoff(self) -> None:
+        payload = self._payload().model_copy(update={"calendar": SchedulingCalendarPreferences()})
+        request, tokens = create_scheduling_request(
+            self.session,
+            tenant_id="tenant-1",
+            user_id="user-1",
+            payload=payload,
+        )
+        first_participant = request.participants[0]
+        first_slot = request.slots[0]
+        second_slot = request.slots[1]
+
+        submit_poll_response_with_token(
+            self.session,
+            token=tokens[first_participant.id],
+            payload=PollSubmitResponseRequest(
+                answers=[
+                    PollAnswerInput(option_id=first_slot.poll_option_id, value="available"),
+                    PollAnswerInput(option_id=second_slot.poll_option_id, value="maybe"),
+                ]
+            ),
+        )
+        summary = scheduling_request_summary(self.session, tenant_id="tenant-1", request_id=request.id)
+
+        self.assertEqual(summary["response_count"], 1)
+        self.assertEqual(first_participant.status, "responded")
+        self.assertIsNotNone(first_participant.responded_at)
+        values = {result["option_id"]: result["values"] for result in summary["option_results"]}
+        self.assertEqual(values[first_slot.poll_option_id]["available"], 1)
+        self.assertEqual(values[second_slot.poll_option_id]["maybe"], 1)
+
+        close_scheduling_request(self.session, tenant_id="tenant-1", request_id=request.id)
+        decided = decide_scheduling_request(
+            self.session,
+            tenant_id="tenant-1",
+            request_id=request.id,
+            payload=SchedulingDecisionRequest(slot_id=first_slot.id, handoff_to_calendar=True),
+        )
+        poll = get_poll(self.session, tenant_id="tenant-1", poll_id=request.poll_id)
+
+        self.assertEqual(decided.status, "handed_off")
+        self.assertEqual(decided.selected_slot_id, first_slot.id)
+        self.assertEqual(decided.metadata_["calendar_handoff"]["status"], "pending")
+        self.assertEqual(poll.status, "decided")
+        self.assertEqual(poll.workflow_state, "handed_off")
+
+    def test_calendar_freebusy_holds_and_final_event_creation(self) -> None:
+        self._calendar()
+        payload = self._payload()
+        request, _tokens = create_scheduling_request(
+            self.session,
+            tenant_id="tenant-1",
+            user_id="user-1",
+            payload=payload,
+        )
+        first_slot = request.slots[0]
+        self.session.add(
+            CalendarEvent(
+                tenant_id="tenant-1",
+                calendar_id="calendar-1",
+                uid="busy@example.test",
+                sequence=0,
+                summary="Busy",
+                status="CONFIRMED",
+                transparency="OPAQUE",
+                classification="PUBLIC",
+                start_at=first_slot.start_at,
+                end_at=first_slot.end_at,
+                all_day=False,
+                attendees=[],
+                categories=[],
+                rdate=[],
+                exdate=[],
+                reminders=[],
+                attachments=[],
+                related_to=[],
+                source_kind="local",
+                icalendar={},
+                metadata_={},
+            )
+        )
+        self.session.flush()
+
+        request, warnings = evaluate_calendar_freebusy(self.session, tenant_id="tenant-1", request_id=request.id)
+        self.assertEqual(warnings, [])
+        self.assertEqual(request.slots[0].freebusy_status, "busy")
+        self.assertEqual(request.slots[1].freebusy_status, "free")
+
+        request, hold_event_ids, warnings = create_tentative_calendar_holds(
+            self.session,
+            tenant_id="tenant-1",
+            user_id="user-1",
+            request_id=request.id,
+        )
+        self.assertEqual(warnings, [])
+        self.assertEqual(len(hold_event_ids), 2)
+        self.assertTrue(all(slot.tentative_hold_event_id for slot in request.slots))
+
+        close_scheduling_request(self.session, tenant_id="tenant-1", request_id=request.id)
+        decided = decide_scheduling_request(
+            self.session,
+            tenant_id="tenant-1",
+            request_id=request.id,
+            payload=SchedulingDecisionRequest(slot_id=request.slots[1].id, handoff_to_calendar=False),
+            user_id="user-1",
+        )
+        decided, event_id, warnings = create_final_calendar_event(
+            self.session,
+            tenant_id="tenant-1",
+            user_id="user-1",
+            request_id=decided.id,
+        )
+
+        self.assertEqual(warnings, [])
+        self.assertIsNotNone(event_id)
+        self.assertEqual(decided.status, "handed_off")
+        self.assertEqual(decided.calendar_event_id, event_id)
+        self.assertEqual(decided.metadata_["calendar_handoff"]["status"], "created")
+
+    def test_notification_outbox_jobs_are_created_and_listed(self) -> None:
+        request, _tokens = create_scheduling_request(
+            self.session,
+            tenant_id="tenant-1",
+            user_id="user-1",
+            payload=self._payload(),
+        )
+
+        reminder_jobs = create_scheduling_notification_jobs(
+            self.session,
+            tenant_id="tenant-1",
+            request_id=request.id,
+            event_kind="reminder",
+        )
+        all_jobs = list_scheduling_notifications(self.session, tenant_id="tenant-1", request_id=request.id)
+
+        self.assertEqual(len(reminder_jobs), 2)
+        self.assertGreaterEqual(len(all_jobs), 4)
+        self.assertTrue(all(job.status == "pending" for job in reminder_jobs))
+
+    def test_external_participants_can_be_rejected(self) -> None:
+        payload = self._payload().model_copy(update={"allow_external_participants": False})
+
+        with self.assertRaisesRegex(SchedulingError, "External participants are not allowed"):
+            create_scheduling_request(
+                self.session,
+                tenant_id="tenant-1",
+                user_id="user-1",
+                payload=payload,
+            )
+
+
+if __name__ == "__main__":
+    unittest.main()

webui/package.json

@@ -0,0 +1,31 @@
+{
+  "name": "@govoplan/scheduling-webui",
+  "version": "0.1.8",
+  "private": true,
+  "type": "module",
+  "main": "src/index.ts",
+  "module": "src/index.ts",
+  "types": "src/index.ts",
+  "exports": {
+    ".": {
+      "types": "./src/index.ts",
+      "import": "./src/index.ts"
+    },
+    "./styles/scheduling.css": "./src/styles/scheduling.css"
+  },
+  "peerDependencies": {
+    "@govoplan/core-webui": "^0.1.8",
+    "lucide-react": "^1.23.0",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0",
+    "react-router-dom": "^7.1.1",
+    "@vitejs/plugin-react": "^4.3.4",
+    "typescript": "^5.7.2",
+    "vite": "^6.0.6"
+  },
+  "peerDependenciesMeta": {
+    "@govoplan/core-webui": {
+      "optional": true
+    }
+  }
+}

webui/src/api/scheduling.ts

@@ -0,0 +1,235 @@
+import { apiFetch, type ApiSettings } from "@govoplan/core-webui";
+
+export type SchedulingStatus = "draft" | "collecting" | "closed" | "decided" | "handed_off" | "cancelled" | "archived";
+
+export type SchedulingCandidateSlot = {
+  id: string;
+  poll_option_id?: string | null;
+  label: string;
+  description?: string | null;
+  start_at: string;
+  end_at: string;
+  timezone: string;
+  location?: string | null;
+  position: number;
+  freebusy_checked_at?: string | null;
+  freebusy_status?: string | null;
+  freebusy_conflicts: Record<string, unknown>[];
+  tentative_hold_event_id?: string | null;
+  metadata?: Record<string, unknown>;
+};
+
+export type SchedulingParticipant = {
+  id: string;
+  respondent_id?: string | null;
+  display_name?: string | null;
+  email?: string | null;
+  participant_type: string;
+  required: boolean;
+  status: string;
+  poll_invitation_id?: string | null;
+  invitation_token?: string | null;
+  last_invited_at?: string | null;
+  responded_at?: string | null;
+  metadata?: Record<string, unknown>;
+};
+
+export type SchedulingRequest = {
+  id: string;
+  tenant_id: string;
+  title: string;
+  description?: string | null;
+  location?: string | null;
+  timezone: string;
+  status: SchedulingStatus;
+  poll_id?: string | null;
+  selected_slot_id?: string | null;
+  organizer_user_id?: string | null;
+  deadline_at?: string | null;
+  allow_external_participants: boolean;
+  allow_participant_updates: boolean;
+  result_visibility: string;
+  calendar_integration_enabled: boolean;
+  calendar_id?: string | null;
+  calendar_freebusy_enabled: boolean;
+  calendar_hold_enabled: boolean;
+  create_calendar_event_on_decision: boolean;
+  calendar_event_id?: string | null;
+  handed_off_at?: string | null;
+  cancelled_at?: string | null;
+  created_at: string;
+  updated_at: string;
+  metadata?: Record<string, unknown>;
+  slots: SchedulingCandidateSlot[];
+  participants: SchedulingParticipant[];
+};
+
+export type SchedulingRequestListResponse = { requests: SchedulingRequest[] };
+export type SchedulingStatusResponse = { request: SchedulingRequest };
+
+export type SchedulingCandidateSlotPayload = {
+  label?: string | null;
+  description?: string | null;
+  start_at: string;
+  end_at: string;
+  timezone?: string | null;
+  location?: string | null;
+  metadata?: Record<string, unknown>;
+};
+
+export type SchedulingParticipantPayload = {
+  respondent_id?: string | null;
+  display_name?: string | null;
+  email?: string | null;
+  participant_type?: "internal" | "external" | "resource";
+  required?: boolean;
+  metadata?: Record<string, unknown>;
+};
+
+export type SchedulingRequestCreatePayload = {
+  title: string;
+  description?: string | null;
+  location?: string | null;
+  timezone?: string;
+  status?: "draft" | "collecting";
+  deadline_at?: string | null;
+  allow_external_participants?: boolean;
+  allow_participant_updates?: boolean;
+  result_visibility?: "organizer" | "after_response" | "after_close" | "public";
+  calendar?: {
+    enabled?: boolean;
+    calendar_id?: string | null;
+    freebusy_enabled?: boolean;
+    tentative_holds_enabled?: boolean;
+    create_event_on_decision?: boolean;
+  };
+  slots: SchedulingCandidateSlotPayload[];
+  participants?: SchedulingParticipantPayload[];
+  create_participant_invitations?: boolean;
+  metadata?: Record<string, unknown>;
+};
+
+export type SchedulingDecisionPayload = {
+  slot_id?: string | null;
+  poll_option_id?: string | null;
+  handoff_to_calendar?: boolean | null;
+};
+
+export type SchedulingCalendarActionResponse = {
+  request: SchedulingRequest;
+  created_event_ids: string[];
+  updated_slot_ids: string[];
+  warnings: string[];
+};
+
+export type SchedulingNotification = {
+  id: string;
+  request_id: string;
+  participant_id?: string | null;
+  event_kind: string;
+  channel: string;
+  recipient?: string | null;
+  status: string;
+  payload: Record<string, unknown>;
+  error?: string | null;
+  sent_at?: string | null;
+  created_at: string;
+  updated_at: string;
+  metadata?: Record<string, unknown>;
+};
+
+export type SchedulingNotificationListResponse = { notifications: SchedulingNotification[] };
+
+export type SchedulingPollOptionResult = {
+  option_id: string;
+  option_key: string;
+  label: string;
+  count: number;
+  score: number;
+  values: Record<string, number>;
+};
+
+export type SchedulingSummaryResponse = {
+  request: SchedulingRequest;
+  poll_summary: {
+    poll_id: string;
+    kind: string;
+    status: string;
+    response_count: number;
+    option_results: SchedulingPollOptionResult[];
+    leading_option_ids: string[];
+  };
+};
+
+export type SchedulingAddressLookupCandidate = {
+  contact_id: string;
+  address_book_id: string;
+  display_name: string;
+  email?: string | null;
+  email_label?: string | null;
+  organization?: string | null;
+  role_title?: string | null;
+  tags: string[];
+  source_kind: string;
+  source_ref?: string | null;
+  source_revision?: string | null;
+  provenance: Record<string, unknown>;
+};
+
+export type SchedulingAddressLookupResponse = {
+  available: boolean;
+  candidates: SchedulingAddressLookupCandidate[];
+};
+
+const json = (payload: unknown) => ({ method: "POST", body: JSON.stringify(payload ?? {}) });
+
+export function lookupSchedulingAddresses(settings: ApiSettings, query: string, limit = 25): Promise<SchedulingAddressLookupResponse> {
+  const params = new URLSearchParams({ query, limit: String(limit) });
+  return apiFetch<SchedulingAddressLookupResponse>(settings, `/api/v1/scheduling/address-lookup?${params.toString()}`);
+}
+
+export function listSchedulingRequests(settings: ApiSettings, status?: string): Promise<SchedulingRequestListResponse> {
+  const query = status ? `?status=${encodeURIComponent(status)}` : "";
+  return apiFetch<SchedulingRequestListResponse>(settings, `/api/v1/scheduling/requests${query}`);
+}
+
+export function createSchedulingRequest(settings: ApiSettings, payload: SchedulingRequestCreatePayload): Promise<SchedulingRequest> {
+  return apiFetch<SchedulingRequest>(settings, "/api/v1/scheduling/requests", json(payload));
+}
+
+export function openSchedulingRequest(settings: ApiSettings, requestId: string): Promise<SchedulingStatusResponse> {
+  return apiFetch<SchedulingStatusResponse>(settings, `/api/v1/scheduling/requests/${requestId}/open`, json({}));
+}
+
+export function closeSchedulingRequest(settings: ApiSettings, requestId: string): Promise<SchedulingStatusResponse> {
+  return apiFetch<SchedulingStatusResponse>(settings, `/api/v1/scheduling/requests/${requestId}/close`, json({}));
+}
+
+export function decideSchedulingRequest(settings: ApiSettings, requestId: string, payload: SchedulingDecisionPayload): Promise<SchedulingStatusResponse> {
+  return apiFetch<SchedulingStatusResponse>(settings, `/api/v1/scheduling/requests/${requestId}/decide`, json(payload));
+}
+
+export function evaluateSchedulingFreeBusy(settings: ApiSettings, requestId: string): Promise<SchedulingCalendarActionResponse> {
+  return apiFetch<SchedulingCalendarActionResponse>(settings, `/api/v1/scheduling/requests/${requestId}/calendar/freebusy`, json({}));
+}
+
+export function createSchedulingHolds(settings: ApiSettings, requestId: string): Promise<SchedulingCalendarActionResponse> {
+  return apiFetch<SchedulingCalendarActionResponse>(settings, `/api/v1/scheduling/requests/${requestId}/calendar/holds`, json({}));
+}
+
+export function createSchedulingCalendarEvent(settings: ApiSettings, requestId: string): Promise<SchedulingCalendarActionResponse> {
+  return apiFetch<SchedulingCalendarActionResponse>(settings, `/api/v1/scheduling/requests/${requestId}/calendar/event`, json({}));
+}
+
+export function schedulingSummary(settings: ApiSettings, requestId: string): Promise<SchedulingSummaryResponse> {
+  return apiFetch<SchedulingSummaryResponse>(settings, `/api/v1/scheduling/requests/${requestId}/summary`);
+}
+
+export function createSchedulingNotifications(settings: ApiSettings, requestId: string, eventKind: string): Promise<SchedulingNotificationListResponse> {
+  return apiFetch<SchedulingNotificationListResponse>(settings, `/api/v1/scheduling/requests/${requestId}/notifications`, json({ event_kind: eventKind }));
+}
+
+export function listSchedulingNotifications(settings: ApiSettings, requestId?: string): Promise<SchedulingNotificationListResponse> {
+  const query = requestId ? `?request_id=${encodeURIComponent(requestId)}` : "";
+  return apiFetch<SchedulingNotificationListResponse>(settings, `/api/v1/scheduling/notifications${query}`);
+}

webui/src/features/scheduling/SchedulingPage.tsx

@@ -0,0 +1,402 @@
+import { useEffect, useMemo, useState, type FormEvent } from "react";
+import { Bell, CalendarCheck, Check, Clock, Plus, RefreshCw, Send, XCircle } from "lucide-react";
+import { Button, EmailAddressInput, hasScope, type ApiSettings, type AuthInfo, type MailboxAddress } from "@govoplan/core-webui";
+import {
+  closeSchedulingRequest,
+  createSchedulingCalendarEvent,
+  createSchedulingHolds,
+  createSchedulingNotifications,
+  createSchedulingRequest,
+  decideSchedulingRequest,
+  evaluateSchedulingFreeBusy,
+  listSchedulingNotifications,
+  listSchedulingRequests,
+  lookupSchedulingAddresses,
+  openSchedulingRequest,
+  schedulingSummary,
+  type SchedulingNotification,
+  type SchedulingRequest,
+  type SchedulingSummaryResponse
+} from "../../api/scheduling";
+
+type SlotDraft = { label: string; start_at: string; end_at: string };
+type ParticipantDraft = { display_name: string; email: string; required: boolean };
+
+const now = new Date();
+const defaultStart = new Date(now.getTime() + 24 * 60 * 60 * 1000);
+defaultStart.setMinutes(0, 0, 0);
+const defaultEnd = new Date(defaultStart.getTime() + 60 * 60 * 1000);
+
+function localValue(date: Date): string {
+  const pad = (value: number) => value.toString().padStart(2, "0");
+  return `${date.getFullYear()}-${pad(date.getMonth() + 1)}-${pad(date.getDate())}T${pad(date.getHours())}:${pad(date.getMinutes())}`;
+}
+
+function isoFromLocal(value: string): string {
+  return new Date(value).toISOString();
+}
+
+export default function SchedulingPage({ settings, auth }: { settings: ApiSettings; auth: AuthInfo }) {
+  const [requests, setRequests] = useState<SchedulingRequest[]>([]);
+  const [selectedId, setSelectedId] = useState("");
+  const [summary, setSummary] = useState<SchedulingSummaryResponse | null>(null);
+  const [notifications, setNotifications] = useState<SchedulingNotification[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [saving, setSaving] = useState(false);
+  const [error, setError] = useState("");
+  const [title, setTitle] = useState("Scheduling poll");
+  const [location, setLocation] = useState("");
+  const [calendarId, setCalendarId] = useState("");
+  const [calendarEnabled, setCalendarEnabled] = useState(false);
+  const [slots, setSlots] = useState<SlotDraft[]>([
+    { label: "Option 1", start_at: localValue(defaultStart), end_at: localValue(defaultEnd) }
+  ]);
+  const [participants, setParticipants] = useState<ParticipantDraft[]>([{ display_name: "", email: "", required: true }]);
+  const [addressLookupQuery, setAddressLookupQuery] = useState("");
+  const [addressSuggestions, setAddressSuggestions] = useState<MailboxAddress[]>([]);
+
+  const canWrite = hasScope(auth, "scheduling:schedule:write");
+  const selected = useMemo(() => requests.find((item) => item.id === selectedId) || requests[0] || null, [requests, selectedId]);
+  const optionResultById = useMemo(() => {
+    const map = new Map<string, SchedulingSummaryResponse["poll_summary"]["option_results"][number]>();
+    for (const result of summary?.poll_summary.option_results || []) map.set(result.option_id, result);
+    return map;
+  }, [summary]);
+
+  useEffect(() => {
+    void loadRequests();
+  }, [settings.apiBaseUrl, settings.apiKey, settings.accessToken]);
+
+  useEffect(() => {
+    if (!selected?.id) {
+      setSummary(null);
+      setNotifications([]);
+      return;
+    }
+    void loadDetails(selected.id);
+  }, [selected?.id]);
+
+  useEffect(() => {
+    const query = addressLookupQuery.trim();
+    if (!canWrite || query.length < 2) {
+      setAddressSuggestions([]);
+      return;
+    }
+    let cancelled = false;
+    const timer = window.setTimeout(() => {
+      void lookupSchedulingAddresses(settings, query).
+        then((response) => {
+          if (cancelled) return;
+          if (!response.available) {
+            setAddressSuggestions([]);
+            return;
+          }
+          setAddressSuggestions(
+            response.candidates
+              .map((candidate) => candidate.email ? { name: candidate.display_name || undefined, email: candidate.email } : null)
+              .filter((address): address is MailboxAddress => Boolean(address?.email))
+          );
+        }).
+        catch(() => {
+          if (!cancelled) setAddressSuggestions([]);
+        });
+    }, 200);
+    return () => {
+      cancelled = true;
+      window.clearTimeout(timer);
+    };
+  }, [addressLookupQuery, canWrite, settings.accessToken, settings.apiBaseUrl, settings.apiKey]);
+
+  async function loadRequests() {
+    setLoading(true);
+    setError("");
+    try {
+      const response = await listSchedulingRequests(settings);
+      setRequests(response.requests);
+      if (!selectedId && response.requests[0]) setSelectedId(response.requests[0].id);
+    } catch (err) {
+      setError(errorMessage(err));
+    } finally {
+      setLoading(false);
+    }
+  }
+
+  async function loadDetails(requestId: string) {
+    try {
+      const [summaryResponse, notificationResponse] = await Promise.all([
+        schedulingSummary(settings, requestId).catch(() => null),
+        listSchedulingNotifications(settings, requestId).catch(() => ({ notifications: [] }))
+      ]);
+      setSummary(summaryResponse);
+      setNotifications(notificationResponse.notifications);
+    } catch (err) {
+      setError(errorMessage(err));
+    }
+  }
+
+  async function createRequest(event: FormEvent) {
+    event.preventDefault();
+    if (!canWrite) return;
+    setSaving(true);
+    setError("");
+    try {
+      const request = await createSchedulingRequest(settings, {
+        title,
+        location: location || null,
+        status: "collecting",
+        calendar: {
+          enabled: calendarEnabled,
+          calendar_id: calendarId || null,
+          freebusy_enabled: calendarEnabled,
+          tentative_holds_enabled: calendarEnabled,
+          create_event_on_decision: calendarEnabled
+        },
+        slots: slots.map((slot) => ({
+          label: slot.label || null,
+          start_at: isoFromLocal(slot.start_at),
+          end_at: isoFromLocal(slot.end_at),
+          location: location || null
+        })),
+        participants: participants
+          .filter((participant) => participant.email || participant.display_name)
+          .map((participant) => ({ ...participant, participant_type: "external" }))
+      });
+      setRequests((items) => [request, ...items]);
+      setSelectedId(request.id);
+    } catch (err) {
+      setError(errorMessage(err));
+    } finally {
+      setSaving(false);
+    }
+  }
+
+  async function runAction(action: () => Promise<{ request?: SchedulingRequest } | SchedulingSummaryResponse | unknown>) {
+    if (!selected || !canWrite) return;
+    setSaving(true);
+    setError("");
+    try {
+      const response = await action();
+      const updated = isRequestEnvelope(response) ? response.request : null;
+      if (updated) {
+        setRequests((items) => items.map((item) => (item.id === updated.id ? updated : item)));
+      }
+      await loadDetails(selected.id);
+    } catch (err) {
+      setError(errorMessage(err));
+    } finally {
+      setSaving(false);
+    }
+  }
+
+  return (
+    <main className="scheduling-page">
+      <div className="scheduling-shell">
+        <aside className="scheduling-sidebar">
+          <div className="scheduling-sidebar-bar">
+            <strong>Scheduling</strong>
+            <Button className="scheduling-icon-button" onClick={() => void loadRequests()} title="Refresh">
+              <RefreshCw size={16} />
+            </Button>
+          </div>
+          <div className="scheduling-list">
+            {loading ? <div className="scheduling-note">Loading</div> : null}
+            {requests.map((request) => (
+              <button
+                key={request.id}
+                className={`scheduling-list-item ${selected?.id === request.id ? "is-selected" : ""}`}
+                type="button"
+                onClick={() => setSelectedId(request.id)}
+              >
+                <span>{request.title}</span>
+                <small>{request.status}</small>
+              </button>
+            ))}
+          </div>
+        </aside>
+        <section className="scheduling-workspace">
+          <div className="scheduling-topbar">
+            <div className="scheduling-title-line">
+              <CalendarCheck size={18} />
+              <strong>{selected?.title || "Scheduling"}</strong>
+            </div>
+            <div className="scheduling-actions">
+              <Button disabled={!selected || saving || !canWrite} onClick={() => void runAction(() => openSchedulingRequest(settings, selected!.id))}>
+                <Send size={16} /> Open
+              </Button>
+              <Button disabled={!selected || saving || !canWrite} onClick={() => void runAction(() => closeSchedulingRequest(settings, selected!.id))}>
+                <XCircle size={16} /> Close
+              </Button>
+              <Button disabled={!selected || saving || !canWrite} onClick={() => void runAction(() => evaluateSchedulingFreeBusy(settings, selected!.id))}>
+                <RefreshCw size={16} /> Free/busy
+              </Button>
+              <Button disabled={!selected || saving || !canWrite} onClick={() => void runAction(() => createSchedulingHolds(settings, selected!.id))}>
+                <Clock size={16} /> Holds
+              </Button>
+              <Button disabled={!selected || saving || !canWrite} onClick={() => void runAction(() => createSchedulingCalendarEvent(settings, selected!.id))}>
+                <CalendarCheck size={16} /> Event
+              </Button>
+              <Button disabled={!selected || saving || !canWrite} onClick={() => void runAction(() => createSchedulingNotifications(settings, selected!.id, "reminder"))}>
+                <Bell size={16} /> Reminder
+              </Button>
+            </div>
+          </div>
+
+          {error ? <div className="scheduling-alert">{error}</div> : null}
+
+          <div className="scheduling-content">
+            <form className="scheduling-create-panel" onSubmit={(event) => void createRequest(event)}>
+              <div className="scheduling-panel-heading">
+                <Plus size={16} />
+                <strong>New poll</strong>
+              </div>
+              <label>
+                <span>Title</span>
+                <input value={title} onChange={(event) => setTitle(event.target.value)} />
+              </label>
+              <label>
+                <span>Location</span>
+                <input value={location} onChange={(event) => setLocation(event.target.value)} />
+              </label>
+              <label className="scheduling-checkbox">
+                <input checked={calendarEnabled} type="checkbox" onChange={(event) => setCalendarEnabled(event.target.checked)} />
+                <span>Calendar</span>
+              </label>
+              {calendarEnabled ? (
+                <label>
+                  <span>Calendar ID</span>
+                  <input value={calendarId} onChange={(event) => setCalendarId(event.target.value)} />
+                </label>
+              ) : null}
+              <div className="scheduling-form-section">
+                <div className="scheduling-mini-heading">
+                  <span>Slots</span>
+                  <Button type="button" onClick={() => setSlots((items) => [...items, { label: `Option ${items.length + 1}`, start_at: localValue(defaultStart), end_at: localValue(defaultEnd) }])}>
+                    <Plus size={14} />
+                  </Button>
+                </div>
+                {slots.map((slot, index) => (
+                  <div className="scheduling-slot-draft" key={index}>
+                    <input value={slot.label} onChange={(event) => updateSlot(index, "label", event.target.value)} />
+                    <input type="datetime-local" value={slot.start_at} onChange={(event) => updateSlot(index, "start_at", event.target.value)} />
+                    <input type="datetime-local" value={slot.end_at} onChange={(event) => updateSlot(index, "end_at", event.target.value)} />
+                  </div>
+                ))}
+              </div>
+              <div className="scheduling-form-section">
+                <div className="scheduling-mini-heading">
+                  <span>Participants</span>
+                  <Button type="button" onClick={() => setParticipants((items) => [...items, { display_name: "", email: "", required: true }])}>
+                    <Plus size={14} />
+                  </Button>
+                </div>
+                {participants.map((participant, index) => (
+                  <div className="scheduling-participant-draft" key={index}>
+                    <input placeholder="Name" value={participant.display_name} onChange={(event) => updateParticipant(index, "display_name", event.target.value)} />
+                    <EmailAddressInput
+                      value={participant.email ? [{ name: participant.display_name || undefined, email: participant.email }] : []}
+                      suggestions={addressSuggestions}
+                      onSuggestionQueryChange={setAddressLookupQuery}
+                      allowMultiple={false}
+                      disabled={!canWrite}
+                      compact
+                      addLabel="Add participant"
+                      emptyText="Participant email"
+                      onChange={(addresses) => {
+                        const address = addresses[0];
+                        updateParticipantDraft(index, {
+                          display_name: address?.name ?? participant.display_name,
+                          email: address?.email ?? ""
+                        });
+                      }} />
+                  </div>
+                ))}
+              </div>
+              <Button disabled={saving || !canWrite} type="submit" variant="primary">
+                <Plus size={16} /> Create
+              </Button>
+            </form>
+
+            <div className="scheduling-detail">
+              {selected ? (
+                <>
+                  <div className="scheduling-status-row">
+                    <span className={`scheduling-status scheduling-status-${selected.status}`}>{selected.status}</span>
+                    <span>{selected.participants.length} participants</span>
+                    <span>{summary?.poll_summary.response_count || 0} responses</span>
+                  </div>
+                  <div className="scheduling-slot-table">
+                    {selected.slots.map((slot) => {
+                      const result = slot.poll_option_id ? optionResultById.get(slot.poll_option_id) : null;
+                      return (
+                        <div className="scheduling-slot-row" key={slot.id}>
+                          <div>
+                            <strong>{slot.label}</strong>
+                            <small>{formatRange(slot.start_at, slot.end_at)}</small>
+                          </div>
+                          <span className={`scheduling-freebusy ${slot.freebusy_status || "unknown"}`}>{slot.freebusy_status || "unchecked"}</span>
+                          <span>{result?.values.available || 0} yes</span>
+                          <span>{result?.values.maybe || 0} maybe</span>
+                          <span>{result?.values.unavailable || 0} no</span>
+                          <Button disabled={saving || !canWrite} onClick={() => void runAction(() => decideSchedulingRequest(settings, selected.id, { slot_id: slot.id, handoff_to_calendar: selected.create_calendar_event_on_decision }))}>
+                            <Check size={16} /> Decide
+                          </Button>
+                        </div>
+                      );
+                    })}
+                  </div>
+                  <div className="scheduling-columns">
+                    <div>
+                      <div className="scheduling-panel-heading"><strong>Participants</strong></div>
+                      {selected.participants.map((participant) => (
+                        <div className="scheduling-compact-row" key={participant.id}>
+                          <span>{participant.display_name || participant.email || participant.id}</span>
+                          <small>{participant.status}</small>
+                        </div>
+                      ))}
+                    </div>
+                    <div>
+                      <div className="scheduling-panel-heading"><strong>Outbox</strong></div>
+                      {notifications.map((notification) => (
+                        <div className="scheduling-compact-row" key={notification.id}>
+                          <span>{notification.event_kind}</span>
+                          <small>{notification.status}</small>
+                        </div>
+                      ))}
+                    </div>
+                  </div>
+                </>
+              ) : (
+                <div className="scheduling-empty">No scheduling request</div>
+              )}
+            </div>
+          </div>
+        </section>
+      </div>
+    </main>
+  );
+
+  function updateSlot(index: number, field: keyof SlotDraft, value: string) {
+    setSlots((items) => items.map((item, itemIndex) => (itemIndex === index ? { ...item, [field]: value } : item)));
+  }
+
+  function updateParticipant(index: number, field: keyof ParticipantDraft, value: string) {
+    setParticipants((items) => items.map((item, itemIndex) => (itemIndex === index ? { ...item, [field]: value } : item)));
+  }
+
+  function updateParticipantDraft(index: number, patch: Partial<ParticipantDraft>) {
+    setParticipants((items) => items.map((item, itemIndex) => (itemIndex === index ? { ...item, ...patch } : item)));
+  }
+}
+
+function isRequestEnvelope(value: unknown): value is { request: SchedulingRequest } {
+  return Boolean(value && typeof value === "object" && "request" in value);
+}
+
+function formatRange(start: string, end: string): string {
+  const formatter = new Intl.DateTimeFormat(undefined, { dateStyle: "short", timeStyle: "short" });
+  return `${formatter.format(new Date(start))} - ${formatter.format(new Date(end))}`;
+}
+
+function errorMessage(error: unknown): string {
+  return error instanceof Error ? error.message : "Request failed";
+}

webui/src/i18n/generatedTranslations.ts

@@ -0,0 +1,4 @@
+export const generatedTranslations = {
+  en: {},
+  de: {}
+};

webui/src/index.ts

@@ -0,0 +1,2 @@
+export { schedulingModule as default, schedulingModule } from "./module";
+export * from "./api/scheduling";

webui/src/module.ts

@@ -0,0 +1,23 @@
+import { createElement, lazy } from "react";
+import type { PlatformWebModule } from "@govoplan/core-webui";
+import { generatedTranslations } from "./i18n/generatedTranslations";
+import "./styles/scheduling.css";
+
+const SchedulingPage = lazy(() => import("./features/scheduling/SchedulingPage"));
+
+const scheduleRead = ["scheduling:schedule:read"];
+
+export const schedulingModule: PlatformWebModule = {
+  id: "scheduling",
+  label: "Scheduling",
+  version: "1.0.0",
+  dependencies: ["poll"],
+  optionalDependencies: ["calendar", "mail", "notifications", "workflow", "appointments", "addresses"],
+  translations: generatedTranslations,
+  navItems: [{ to: "/scheduling", label: "Scheduling", iconName: "calendar-clock", anyOf: scheduleRead, order: 56 }],
+  routes: [
+    { path: "/scheduling", anyOf: scheduleRead, order: 56, render: ({ settings, auth }) => createElement(SchedulingPage, { settings, auth }) }
+  ]
+};
+
+export default schedulingModule;

webui/src/styles/scheduling.css

@@ -0,0 +1,308 @@
+.scheduling-page {
+  box-sizing: border-box;
+  height: calc(100vh - 115px);
+  min-height: 0;
+  padding: 0;
+  overflow: hidden;
+  color: var(--text);
+  background: var(--bg);
+}
+
+.scheduling-page *,
+.scheduling-page *::before,
+.scheduling-page *::after {
+  box-sizing: border-box;
+}
+
+.scheduling-shell {
+  min-height: 0;
+  height: 100%;
+  display: grid;
+  grid-template-columns: minmax(250px, 310px) minmax(0, 1fr);
+  border: var(--border-line);
+  background: var(--panel);
+  overflow: hidden;
+}
+
+.scheduling-sidebar {
+  min-width: 0;
+  min-height: 0;
+  display: flex;
+  flex-direction: column;
+  border-right: var(--border-line);
+  background: var(--panel-soft);
+}
+
+.scheduling-sidebar-bar,
+.scheduling-topbar,
+.scheduling-panel-heading,
+.scheduling-mini-heading,
+.scheduling-status-row,
+.scheduling-actions,
+.scheduling-title-line {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.scheduling-sidebar-bar {
+  justify-content: space-between;
+  min-height: 54px;
+  padding: 10px 12px;
+  border-bottom: var(--border-line);
+  background: var(--panel-header);
+}
+
+.scheduling-icon-button.btn {
+  width: 34px;
+  min-width: 34px;
+  height: 34px;
+  padding: 0;
+  justify-content: center;
+}
+
+.scheduling-list {
+  min-height: 0;
+  overflow: auto;
+  padding: 8px;
+}
+
+.scheduling-list-item {
+  width: 100%;
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) auto;
+  gap: 8px;
+  align-items: center;
+  min-height: 40px;
+  margin: 0 0 4px;
+  padding: 8px 9px;
+  border: 0;
+  border-radius: 6px;
+  color: var(--text);
+  background: transparent;
+  text-align: left;
+  cursor: pointer;
+}
+
+.scheduling-list-item:hover,
+.scheduling-list-item.is-selected {
+  background: var(--hover-bg);
+}
+
+.scheduling-list-item span,
+.scheduling-slot-row strong,
+.scheduling-compact-row span {
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.scheduling-list-item small,
+.scheduling-slot-row small,
+.scheduling-compact-row small,
+.scheduling-note {
+  color: var(--muted);
+  font-size: 12px;
+}
+
+.scheduling-workspace {
+  min-width: 0;
+  min-height: 0;
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
+}
+
+.scheduling-topbar {
+  justify-content: space-between;
+  min-height: 54px;
+  padding: 9px 12px;
+  border-bottom: var(--border-line);
+  background: var(--panel-header);
+}
+
+.scheduling-title-line {
+  min-width: 180px;
+}
+
+.scheduling-actions {
+  flex-wrap: wrap;
+  justify-content: flex-end;
+}
+
+.scheduling-actions .btn,
+.scheduling-create-panel .btn,
+.scheduling-slot-row .btn {
+  min-height: 32px;
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+}
+
+.scheduling-alert {
+  margin: 8px 12px 0;
+  padding: 8px 10px;
+  border: var(--border-line);
+  border-color: var(--danger);
+  border-radius: 6px;
+  color: var(--danger);
+  background: var(--danger-soft);
+}
+
+.scheduling-content {
+  min-height: 0;
+  display: grid;
+  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
+  gap: 0;
+  overflow: hidden;
+}
+
+.scheduling-create-panel,
+.scheduling-detail {
+  min-height: 0;
+  overflow: auto;
+  padding: 12px;
+}
+
+.scheduling-create-panel {
+  display: grid;
+  align-content: start;
+  gap: 10px;
+  border-right: var(--border-line);
+  background: var(--panel-soft);
+}
+
+.scheduling-create-panel label,
+.scheduling-form-section {
+  display: grid;
+  gap: 5px;
+}
+
+.scheduling-create-panel label span,
+.scheduling-mini-heading span {
+  color: var(--muted);
+  font-size: 12px;
+  font-weight: 700;
+}
+
+.scheduling-create-panel input {
+  width: 100%;
+  min-height: 34px;
+  padding: 6px 8px;
+  border: var(--border-line);
+  border-radius: 6px;
+  color: var(--text);
+  background: var(--input-bg);
+}
+
+.scheduling-checkbox {
+  grid-template-columns: auto minmax(0, 1fr);
+  align-items: center;
+}
+
+.scheduling-slot-draft,
+.scheduling-participant-draft {
+  display: grid;
+  gap: 6px;
+}
+
+.scheduling-slot-draft {
+  grid-template-columns: minmax(0, 1fr);
+}
+
+.scheduling-status-row {
+  flex-wrap: wrap;
+  margin-bottom: 10px;
+}
+
+.scheduling-status {
+  padding: 4px 8px;
+  border-radius: 999px;
+  color: var(--text-strong);
+  background: var(--panel-soft);
+  font-size: 12px;
+  font-weight: 700;
+}
+
+.scheduling-status-collecting,
+.scheduling-status-handed_off {
+  background: color-mix(in srgb, var(--accent) 18%, transparent);
+}
+
+.scheduling-slot-table {
+  display: grid;
+  gap: 6px;
+}
+
+.scheduling-slot-row {
+  display: grid;
+  grid-template-columns: minmax(180px, 1fr) auto auto auto auto auto;
+  gap: 8px;
+  align-items: center;
+  min-height: 46px;
+  padding: 8px;
+  border-bottom: var(--border-line);
+}
+
+.scheduling-slot-row:hover {
+  background: var(--hover-bg);
+}
+
+.scheduling-freebusy {
+  min-width: 74px;
+  padding: 3px 7px;
+  border-radius: 6px;
+  text-align: center;
+  font-size: 12px;
+  font-weight: 700;
+  background: var(--panel-soft);
+}
+
+.scheduling-freebusy.free {
+  color: var(--success);
+}
+
+.scheduling-freebusy.busy,
+.scheduling-freebusy.error {
+  color: var(--danger);
+}
+
+.scheduling-columns {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 12px;
+  margin-top: 16px;
+}
+
+.scheduling-compact-row {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) auto;
+  gap: 8px;
+  min-height: 34px;
+  align-items: center;
+  border-bottom: var(--border-line);
+}
+
+.scheduling-empty {
+  padding: 20px;
+  color: var(--muted);
+}
+
+@media (max-width: 980px) {
+  .scheduling-shell,
+  .scheduling-content,
+  .scheduling-columns {
+    grid-template-columns: minmax(0, 1fr);
+  }
+
+  .scheduling-sidebar,
+  .scheduling-create-panel {
+    border-right: 0;
+    border-bottom: var(--border-line);
+  }
+
+  .scheduling-slot-row {
+    grid-template-columns: minmax(0, 1fr) auto;
+  }
+}

webui/src/vite-env.d.ts

@@ -0,0 +1,13 @@
+interface ImportMetaEnv {
+  readonly VITE_API_BASE_URL?: string;
+  readonly VITE_CSRF_COOKIE_NAME?: string;
+}
+
+interface ImportMeta {
+  readonly env: ImportMetaEnv;
+}
+
+declare module "virtual:govoplan-installed-modules" {
+  const modules: any[];
+  export default modules;
+}

webui/tsconfig.json

@@ -0,0 +1,31 @@
+{
+  "compilerOptions": {
+    "target": "ES2020",
+    "useDefineForClassFields": true,
+    "lib": ["DOM", "DOM.Iterable", "ES2020"],
+    "allowJs": false,
+    "skipLibCheck": true,
+    "esModuleInterop": true,
+    "allowSyntheticDefaultImports": true,
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "forceConsistentCasingInFileNames": true,
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "noEmit": true,
+    "jsx": "react-jsx",
+    "preserveSymlinks": true,
+    "baseUrl": ".",
+    "paths": {
+      "@govoplan/core-webui": ["../../govoplan-core/webui/src/index.ts"],
+      "@govoplan/core-webui/*": ["../../govoplan-core/webui/src/*"],
+      "lucide-react": ["../../govoplan-core/webui/node_modules/lucide-react/dist/lucide-react.d.ts"],
+      "react": ["../../govoplan-core/webui/node_modules/@types/react/index.d.ts"],
+      "react/jsx-runtime": ["../../govoplan-core/webui/node_modules/@types/react/jsx-runtime.d.ts"]
+    }
+  },
+  "include": ["src"]
+}