# BR-ORCH-045: Completion Notification

**Service**: RemediationOrchestrator Controller
**Category**: V1.0 Core Requirements
**Priority**: P1 (HIGH)
**Version**: 1.0
**Date**: 2026-02-05
**Status**: Planned
**Related BRs**: BR-ORCH-001 (Approval Notification), BR-ORCH-034 (Bulk Duplicate Notification), BR-ORCH-036 (Manual Review Notification)
**Related DDs**: DD-NOT-002 (File-Based E2E Tests)

---

## Overview

RemediationOrchestrator MUST create a NotificationRequest CRD with `type=completion` when a RemediationRequest transitions to the `Completed` phase after successful WorkflowExecution.

**Business Value**: Operators must be informed when Kubernaut successfully remediates an incident. Without this notification, the platform performs autonomous remediation silently, leaving operators with no visibility into successful outcomes. This is the most common and most important notification type -- it proves the platform's value.

**Gap Identified**: `transitionToCompleted()` in the reconciler currently updates the RR status and emits an audit event, but does not create a NotificationRequest. The `CreateBulkDuplicateNotification()` function exists for the duplicate case (BR-ORCH-034) but is not wired into the completion path either.

---

## Requirements

### BR-ORCH-045.1: Create Completion NotificationRequest

**MUST**: When `transitionToCompleted()` succeeds, the RemediationOrchestrator MUST create a NotificationRequest CRD with the following:

- **Name**: `nr-completion-{remediationRequest}` (deterministic, idempotent)
- **Type**: `completion`
- **Priority**: Mapped from the signal's business priority (P0=medium, P1=low, P2=low, P3=low). Successful completions are informational, not urgent.
- **Subject**: `Remediation Completed: {signalName}`
- **Body**: Includes signal name, severity, root cause analysis summary, workflow executed, execution duration, outcome
- **Channels**: `[slack, file]` (file channel enables E2E verification via file sink)
- **Metadata**: `remediationRequest`, `aiAnalysis`, `workflowExecution`, `workflowId`, `rootCause`, `duration`, `outcome`
- **Spec fields**: `spec.type=completion`, `spec.remediationRequestRef` (Issue #91: labels removed; ownerRef sufficient for component)
- **OwnerReference**: RemediationRequest (for cascade deletion per BR-ORCH-031)

### BR-ORCH-045.2: Idempotency

**MUST**: Use deterministic naming (`nr-completion-{rr.Name}`) and check for existing CRD before creation. If the NotificationRequest already exists, return the existing name without error.

### BR-ORCH-045.3: Wire Bulk Duplicate Notification

**SHOULD**: Also wire the existing `CreateBulkDuplicateNotification()` (BR-ORCH-034) into `transitionToCompleted()` when `rr.Status.DuplicateCount > 0`. This is dead code today and should be activated.

### BR-ORCH-045.4: Metrics

**MUST**: Track completion notification creation for observability. *(Note: `CompletionNotificationsTotal` metric was removed per GitHub issue #294.)*

---

## Acceptance Criteria

| ID | Criterion | Test Coverage |
|----|-----------|---------------|
| AC-045-1 | Successful WE completion creates NotificationRequest with type=completion | Unit, Integration, E2E |
| AC-045-2 | NotificationRequest contains signal name, RCA summary, workflow ID, duration | Unit |
| AC-045-3 | Idempotent: duplicate reconciles do not create duplicate NotificationRequests | Unit |
| AC-045-4 | NotificationRequest has OwnerReference to RemediationRequest | Unit |
| AC-045-5 | Channels include file (for E2E verification) and slack | Unit |
| AC-045-6 | Completion notification creation tracked | Unit |
| AC-045-7 | Notification controller processes completion NR and writes to file sink | E2E |

---

## Notification Content Template

```
Remediation Completed Successfully

**Signal**: {signalName}
**Severity**: {severity}

**Root Cause Analysis**:
{rootCauseAnalysis}

**Workflow Executed**: {workflowId}
**Execution Engine**: {executionEngine}
**Duration**: {duration}
**Outcome**: {outcome}

This incident was automatically detected and remediated by Kubernaut.
```

---

## Implementation Notes

- Add `NotificationTypeCompletion = "completion"` to `api/notification/v1alpha1/notificationrequest_types.go`
- Add `CreateCompletionNotification()` to `pkg/remediationorchestrator/creator/notification.go`
- Wire into `transitionToCompleted()` in `internal/controller/remediationorchestrator/reconciler.go`
- Regenerate CRDs after adding new NotificationType enum value (`make manifests`)
- The completion notification requires access to the AIAnalysis CRD (for RCA summary and workflow ID) and WorkflowExecution CRD (for duration). The reconciler must fetch these before calling the notification creator.
- **Issue #518**: `executionEngine` in the notification template is sourced from `WorkflowExecution.Status.ExecutionEngine` (resolved at runtime by the WE controller from the DS catalog). The RO reconciler fetches the WFE via `rr.Status.WorkflowExecutionRef`, reads `we.Status.ExecutionEngine`, and passes it as an explicit parameter to `CreateCompletionNotification()`. The engine is stored in `NR.Spec.Metadata["executionEngine"]` (informational field). Falls back to empty string if WFE fetch fails (best-effort).
