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 hmcts/agentic-plugins-marketplace --skill architecture-designgit clone --depth 1 https://github.com/hmcts/agentic-plugins-marketplaceWrote 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/hmcts/agentic-plugins-marketplace/architecture-design)<a href="https://agentmods.dev/skills/hmcts/agentic-plugins-marketplace/architecture-design"><img src="https://agentmods.dev/badge/skills/hmcts/agentic-plugins-marketplace/architecture-design/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/hmcts/agentic-plugins-marketplace/architecture-design"><img src="https://agentmods.dev/badge/skills/hmcts/agentic-plugins-marketplace/architecture-design.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 | $0.00083 | $0.01493 |
| Opus 5 | $0.00042 | $0.00746 |
| Sonnet 5 | $0.00017 | $0.00299 |
| Haiku 4.5 | $0.00008 | $0.00149 |
Grade A, and why
architecture-design 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 9d 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 — 115 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Architecture Design (CPP)
Produces a design proposal for a new CPP capability that fits the platform's CQRS/Event Sourcing context-service pattern or the Modern by Default (MbD) Spring Boot pattern, whichever suits best. Delegates deep analysis to the architecture-designer agent and hands off to scaffolding skills when the user approves.
When to Use
Triggers: "design a service for…", "how should we architect…", "what's the right pattern for…", "plan a new context/MbD service", "model this bounded context", "design the event flow for…", "cross-context design for…".
Do not use for:
- Implementing an already-agreed design → use
springboot-service-from-templateorcontext-scaffold. - Reviewing an existing design/PR → use
review-prorcode-reviewer. - Writing a formal OpenSpec change → use
openspec-propose(this skill can feed into it).
Required Input
Ask the user (once, all at once):
- Problem statement — what capability or change is needed, and why.
- Users / triggers — who or what initiates the flow (UI action, external event, scheduled job, another context).
- Expected outcome — what state changes, what events/notifications, what reads the UI needs.
- Known constraints — deadlines, compliance, existing services to integrate with, anything off-limits.
- Existing context — is there already a context service or MbD service this should live in, or is this greenfield?
If the user's message already contains enough of this, skip the questions and proceed. Do not stall on missing details you can reasonably assume — make the assumption explicit in the output.
Workflow
Step 1 — Frame the problem
Restate the problem in one paragraph and list your assumptions. This anchors the design and exposes misunderstandings early.
Step 2 — Survey the platform
Before designing, read the relevant neighbours so the design fits reality:
grepfor existing contexts / services mentioned in the problem acrosscpp-context-*andcpp-mbd-*.- Read the closest 1–2 analogous services' top-level structure (
pom.xml/build.gradle, one command handler, one event schema). - Check
cpp-platform-core-domainfor existing shared schemas you should reuse. - Check
cp-c4-architectureif the context is already modelled.
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.
- 9d ago First seen · 115 lines · 83 tokens per session scan A 5c8b58656d8e
architecture-design is a skill published in the GitHub repository hmcts/agentic-plugins-marketplace (3 stars, last pushed today), licensed MIT. It adds 83 tokens to every session and 1,493 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 2026-08-31.
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