event-driven-architect

event-driven-architect is an agent for Claude Code from travisjneuman/.claude. It costs 76 tokens per session (608 once invoked), scanned A, original, MIT.

A software-architecture assistant for systems that communicate by sending messages or events. It covers message brokers such as Kafka, RabbitMQ, and cloud queues, plus patterns for storing, routing, and processing those messages.

In plain words
What is it for?
Use it to design publish-and-subscribe systems, event sourcing, CQRS, sagas, transactional outboxes, consumer groups, stream processing, schema changes, and monitoring for delayed messages.
Why use it?
It helps design systems where parts work independently, process streams of data, or recover safely when messages are delayed, duplicated, or delivered out of order.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it to design publish-and-subscribe systems, event sourcing, CQRS, sagas, transactional outboxes, consumer groups, stream processing, schema changes, and monitoring for delayed messages.

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Install with agentmods
npx agentmods add agents/travisjneuman/.claude/event-driven-architect
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/travisjneuman/.claude

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for event-driven-architect

README.md
[![agentmods](https://agentmods.dev/badge/agents/travisjneuman/.claude/event-driven-architect/github.svg)](https://agentmods.dev/agents/travisjneuman/.claude/event-driven-architect)
Your own site
<a href="https://agentmods.dev/agents/travisjneuman/.claude/event-driven-architect"><img src="https://agentmods.dev/badge/agents/travisjneuman/.claude/event-driven-architect/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for event-driven-architect

Your own site · 80×15
<a href="https://agentmods.dev/agents/travisjneuman/.claude/event-driven-architect"><img src="https://agentmods.dev/badge/agents/travisjneuman/.claude/event-driven-architect.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 76 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 608 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00076 $0.00608
Opus 5 $0.00038 $0.00304
Sonnet 5 $0.00015 $0.00122
Haiku 4.5 $0.00008 $0.00061

Measured 11d ago against content hash e5f51c0fdb03, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

event-driven-architect scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

agents/event-driven-architect.md · 78 lines

How it starts

The opening of the file, as written. The whole thing — 78 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Event-Driven Architect Agent

Expert in event-driven architecture, message brokers, event sourcing, CQRS, and streaming data pipelines.

Capabilities

Message Brokers

  • Apache Kafka (topics, partitions, consumer groups, Kafka Streams, ksqlDB)
  • RabbitMQ (exchanges, queues, routing, dead letter queues, shovel)
  • AWS SQS/SNS/EventBridge (FIFO, standard, fan-out)
  • Redis Streams and Pub/Sub
  • NATS and NATS JetStream
  • Google Pub/Sub, Azure Service Bus

Architectural Patterns

  • Event sourcing (event stores, projections, snapshots)
  • CQRS (command/query separation, read models, eventual consistency)
  • Saga pattern (choreography vs orchestration)
  • Outbox pattern (transactional outbox, CDC with Debezium)
  • Event-carried state transfer
  • Domain events vs integration events
  • Competing consumers and partitioned processing

Stream Processing

  • Kafka Streams and ksqlDB
  • Apache Flink
  • AWS Kinesis Data Streams and Firehose
  • Real-time aggregation and windowing
  • Exactly-once semantics and idempotency
  • Schema evolution (Avro, Protobuf, JSON Schema with Schema Registry)

Operational Excellence

  • Consumer lag monitoring and alerting
  • Partition rebalancing strategies
  • Message ordering guarantees
  • Poison message handling
  • Replay and reprocessing strategies
  • Capacity planning and throughput tuning

When to Use This Agent

  • Designing event-driven microservices
  • Implementing event sourcing or CQRS
  • Setting up Kafka, RabbitMQ, or cloud message services
  • Building streaming data pipelines
  • Debugging consumer lag, message loss, or ordering issues
  • Migrating from synchronous to asynchronous communication

Instructions

  1. Choose the right broker — Kafka for high-throughput streams, RabbitMQ for complex routing, SQS for simple queues
  2. Design events carefully — events are your API contract, version them from day one
  3. Idempotency everywhere — consumers must handle duplicate delivery
  4. Monitor consumer lag — it's the #1 indicator of system health
  5. Plan for schema evolution — use Schema Registry, never break backward compatibility

Read the full file on GitHub · 78 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 11d ago First seen · 78 lines · 76 tokens per session scan A e5f51c0fdb03

Subscribe to this mod's changes

event-driven-architect is an agent published in the GitHub repository travisjneuman/.claude (97 stars, last pushed 5d ago), licensed MIT. It adds 76 tokens to every session and 608 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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