scn_id: SCN-OPS-EVENT-NOTIFY-001 title: Plugin Release Event Subscription & Notification status: Draft version: v0.1.0 owners:

• name: Matrix Ops role: Platform Ops Lead contact: ops@artisan-cloud.com
• name: Eva Zhang role: Automation Steward contact: automation@artisan-cloud.com domains: [ops] layers: [service, integration] repos:
• key: powerx scope: core-platform responsibility: > Event bus, subscription governance, retry policies
• key: powerx-plugin scope: plugin-ecosystem responsibility: > Plugin event adapters, subscription configuration management related_usecases:
• doc_id: UC-OPS-EVENT-NOTIFY-001 layer: service domain: ops last_reviewed_at: 2025-10-31

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Executive Summary

When a plugin is released in a production tenant, the system must deliver plugin.release.published and other critical events to the Ops console, CI/CD, and alerting endpoints within 5 seconds. This sub-scenario focuses on the unified event model, subscription governance, and multi-channel delivery so that notifications are reliable, retries are automatic, the entire chain is traceable, and duplicate or throttled deliveries are avoided.

Scope & Guardrails

• In Scope: Event schema standardization, tenant isolation, subscription matching, Webhook/queue delivery, delayed retries, event tracing, and auditing.
• Out of Scope: Plugin release approval workflows, downstream subscriber business logic, and cross-region mirroring (covered by the global operations scenario).
• Environment & Flags: "event-bus-v2, plugin-release-webhook, audit-streaming; depends on the Kafka event bus, subscription configuration store, and the Ops console event center."

Participants & Responsibilities

Scope	Repository	Layer	Responsibilities	Owners
core-platform	powerx	service	Event schema validation, subscription matching, delivery & retry, audit trail	Matrix Ops (Platform Ops Lead / ops@artisan-cloud.com)
plugin-ecosystem	powerx-plugin	integration	Plugin release adapters, subscription templates, SDK tooling	Plugin Guild (Plugin Partner / plugin@artisan-cloud.com)
automation	powerx	ops	Event replay scripts, failure alerting, Ops governance capabilities	Eva Zhang (Automation Steward / automation@artisan-cloud.com)

End-to-End Flow

1. Stage 1 – Event Publication: "The release pipeline emits a standardized plugin.release.published event to the bus and records an idempotency key."
2. Stage 2 – Subscription Matching: The router resolves subscriptions by tenant, tags, and rate limits to build the delivery plan.
3. Stage 3 – Multi-channel Delivery: The dispatcher pushes via Webhook or message queues; failures enter delayed retry or circuit breaking.
4. Stage 4 – Traceability & Remediation: Delivery results are stored in the event log so Ops can query, replay, or create manual work orders.

Key Interactions & Contracts

• APIs / Events: "EVENT plugin.release.published, EVENT event.delivery.failed, POST /internal/events/publish (replay), POST /internal/events/subscriptions."
• Configs / Schemas: "docs/standards/events/event-bus-schema.md, config/events/subscriptions.yaml, docs/standards/ops/event-retry-policy.md."
• Security / Compliance: HMAC signature validation, anti-replay idempotency keys, tenant isolation, audit logging, approval for escalated failures.

Usecase Links

• UC-OPS-EVENT-NOTIFY-001 — Multi-channel notification for plugin release events.

Acceptance Criteria

1. Initial delivery success rate ≥ 97%; cumulative success rate after retries ≥ 99.5%; duplicate delivery rate < 0.5%.
2. Event center surfaces delivery details within 1 minute and supports filtering by tenant, subscriber, and status with replay capability.
3. Failed deliveries automatically enter delayed retry and trigger PagerDuty alerts once thresholds are exceeded.

Telemetry & Ops

• Metrics: "event.delivery.success_total, event.delivery.retry_total, event.delivery.latency_p95, event.delivery.duplicate_total."
• Alert thresholds: Failure rate > 5% over 5 minutes, signature validation errors, delivery latency > 10 seconds.
• Observability sources: "Grafana Runtime Ops / Event Delivery, Datadog event.delivery.*, Ops console event center, scripts/ops/replay-event.mjs."

Open Issues & Follow-ups

Risk / Item	Impact	Owner	ETA
Cross-region mirroring latency > 8 seconds impacts global subscribers	Multi-region subscribers	Matrix Ops	2025-11-12
No automated reminder for rotating signing keys	Webhook delivery security	Eva Zhang	2025-11-18

Appendix

• docs/meta/scenarios/powerx/core-platform/runtime-ops/event-and-taskflow-management/primary.md
• scripts/ops/replay-event.mjs, scripts/ops/validate-webhook.mjs
• Ops console subscription configuration guide (Confluence: Runtime-Ops-Event-Subscriptions)