# Architecture Event Driven

> Event-driven architecture workflow for asynchronous integration, decoupled workflows, and failure-tolerant event propagation. Use when temporal decoupling and independent evolution are required; do not use when strict synchronous consistency is mandatory across all steps.

- **Type:** Skill
- **Install:** `agentstack add skill-kentoshimizu-sw-agent-skills-architecture-event-driven`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [KentoShimizu](https://agentstack.voostack.com/s/kentoshimizu)
- **Installs:** 0
- **Category:** [Agent Skills](https://agentstack.voostack.com/c/agent-skills)
- **Latest version:** 0.1.0
- **License:** Apache-2.0
- **Upstream author:** [KentoShimizu](https://github.com/KentoShimizu)
- **Source:** https://github.com/KentoShimizu/sw-agent-skills/tree/main/skills/architecture-event-driven

## Install

```sh
agentstack add skill-kentoshimizu-sw-agent-skills-architecture-event-driven
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Architecture Event Driven

## Overview
Use this skill to design event-driven systems that remain correct under retries, delays, and partial failures.

## Scope Boundaries
- Workflows span multiple bounded contexts or services asynchronously.
- Temporal decoupling is needed to improve autonomy or resilience.
- Integration churn is high and direct RPC coupling causes fragility.

## Core Judgments
- Event semantics: fact versus command and ownership of meaning.
- Delivery guarantees: at-most-once, at-least-once, effectively-once patterns.
- Ordering strategy: global ordering, per-key ordering, or order independence.
- Recovery model: replay, dead-letter, compensating actions, and backfill.

## Practitioner Heuristics
- Publish events as immutable domain facts from the source of truth.
- Never rely on "exactly-once" assumptions; design idempotent consumers.
- Partition keys must align with business consistency boundaries.
- Version event contracts with additive evolution first; reserve breaking changes for controlled migrations.

## Workflow
1. Define domain events and ownership boundaries.
2. Specify producer guarantees and consumer idempotency requirements.
3. Choose ordering and partitioning strategies by business invariant.
4. Design failure-handling paths for retry storms, poison messages, and replay.
5. Align observability with event lifecycle (published, consumed, failed, compensated).
6. Document contract evolution and deprecation strategy.

## Common Failure Modes
- Events used as remote procedure calls in disguise.
- Shared event schema controlled by consumers instead of producers.
- Unbounded retry loops causing downstream saturation.

## Failure Conditions
- Stop when event ownership or semantics are ambiguous.
- Stop when consumer correctness depends on fragile global ordering.
- Escalate when replay/compensation behavior is undefined for critical flows.

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [KentoShimizu](https://github.com/KentoShimizu)
- **Source:** [KentoShimizu/sw-agent-skills](https://github.com/KentoShimizu/sw-agent-skills)
- **License:** Apache-2.0

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-kentoshimizu-sw-agent-skills-architecture-event-driven
- Seller: https://agentstack.voostack.com/s/kentoshimizu
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.