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.
npx skills add Tyler-R-Kendrick/agent-skills --skill microservicesgit clone --depth 1 https://github.com/Tyler-R-Kendrick/agent-skillsWrote 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.
[](https://agentmods.dev/skills/tyler-r-kendrick/agent-skills/microservices)<a href="https://agentmods.dev/skills/tyler-r-kendrick/agent-skills/microservices"><img src="https://agentmods.dev/badge/skills/tyler-r-kendrick/agent-skills/microservices/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.
<a href="https://agentmods.dev/skills/tyler-r-kendrick/agent-skills/microservices"><img src="https://agentmods.dev/badge/skills/tyler-r-kendrick/agent-skills/microservices.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00092 | $0.02419 |
| Opus 5 | $0.00046 | $0.01210 |
| Sonnet 5 | $0.00018 | $0.00484 |
| Haiku 4.5 | $0.00009 | $0.00242 |
Grade A, and why
microservices 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 10d 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.
How it starts
The opening of the file, as written. The whole thing — 211 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Microservices Architecture
Overview
Microservices architecture structures an application as a collection of loosely coupled, independently deployable services, each organized around a business capability. Each service owns its data, runs in its own process, and communicates over the network.
The canonical reference is Sam Newman's Building Microservices (O'Reilly, 2nd edition 2021), supplemented by Monolith to Microservices (Newman, 2019) for migration strategies.
The First Rule of Microservices: Don't start with microservices. Start with a monolith, understand your domain, and decompose when you have evidence that the benefits outweigh the operational costs. (See dev/architecture/monoliths for the monolith-first approach.)
Service Decomposition
By Business Capability
Align services to what the business does (e.g., Order Management, Inventory, Payments). This creates stable boundaries because business capabilities change less frequently than technical layers.
By Subdomain (DDD-Aligned)
Use Domain-Driven Design bounded contexts as service boundaries (see dev/architecture/domain-driven-design):
- Core subdomains -- Your competitive advantage; build custom services.
- Supporting subdomains -- Necessary but not differentiating; simpler services or libraries.
- Generic subdomains -- Commodity; buy or use off-the-shelf (auth, email, payments).
Decomposition Heuristics
| Heuristic | Description |
|---|---|
| Single Responsibility | Each service does one thing well |
| Data ownership | Each service owns its data; no shared databases |
| Independent deployability | Changing one service does not require deploying another |
| Team alignment | One team can own and operate the service end-to-end |
| Bounded context boundary | Service boundaries align with DDD bounded contexts |
Inter-Service Communication
Synchronous Communication
| Pattern | Protocol | When to Use |
|---|---|---|
| Request/Response (REST) | HTTP/JSON | Simple CRUD, external APIs, broad tooling support |
| Request/Response (gRPC) | HTTP/2 + Protobuf | Internal service-to-service; high throughput, strong typing, streaming |
| GraphQL | HTTP/JSON | Client-driven queries; aggregating multiple services for a frontend |
What ships with it
12 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- AGENTS.md 11 KB
- metadata.json 700 B
- README.md 671 B
- rules/_sections.md 1.5 KB
- rules/_template.md 372 B
- rules/microservices-deploy-independently-test-independently-fail-independently.md 374 B
- rules/microservices-design-for-failure-from-day-one.md 335 B
- rules/microservices-keep-services-small-enough-to-be-owned-by-a-single-team.md 421 B
- rules/microservices-make-inter-service-communication-observable.md 390 B
- rules/microservices-own-your-data.md 286 B
- rules/microservices-prefer-asynchronous-communication-use-synchronous-calls.md 391 B
- rules/microservices-use-consumer-driven-contract-testing-pact-spring-cloud.md 429 B
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.
- 10d ago First seen · 211 lines · 92 tokens per session scan A 0ee89a8c6d3b
microservices is a skill published in the GitHub repository Tyler-R-Kendrick/agent-skills (11 stars, last pushed 3mo ago), licensed MIT. It adds 92 tokens to every session and 2,419 once invoked, about $0.0005 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 2026-08-31.
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