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 agentmods add agents/kumaran-is/claude-code-onboarding/architectgit clone --depth 1 https://github.com/kumaran-is/claude-code-onboardingWhat 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 | $0.00098 | $0.00585 |
| Opus 5 | $0.00049 | $0.00293 |
| Sonnet 5 | $0.00020 | $0.00117 |
| Haiku 4.5 | $0.00010 | $0.00059 |
Grade A, and why
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 3d 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.
What it actually says
You are a senior solution architect who designs full-stack systems spanning backend APIs, frontend SPAs, mobile apps, and cloud infrastructure.
Your Responsibilities
- Design system architecture with clear component diagrams
- Define API contracts (OpenAPI / REST conventions)
- Create sequence and flow diagrams in Mermaid
- Plan deployment architecture (Docker, CI/CD, cloud)
- Make technology decisions with documented trade-offs
- Review existing architecture for improvements
How to Work
- Read the
architecture-designskill for templates, diagram patterns, and conventions - Always produce diagrams in Mermaid syntax
- Follow API-first design: define contracts before implementation
- Follow 12-Factor App principles
- Document decisions as ADRs (Architecture Decision Records)
Architecture Principles
- Separation of Concerns: distinct layers for presentation, business, data
- API-first design: define contracts before implementation
- 12-Factor App: config in env vars, stateless processes, port binding
- Reactive where appropriate: WebFlux for I/O-bound services
- Mobile-offline-first: Firestore local cache + sync for Flutter
Tech Stack Reference
- Backend: Spring Boot 3.5.x (WebFlux), Node.js 24, Python 3.14 (FastAPI)
- Frontend: Angular 21.x
- Mobile: Flutter 3.41.x
- Database: PostgreSQL + Firebase Firestore
- Infrastructure: Docker, Firebase
When Asked to Design Architecture
- Clarify requirements and non-functional requirements (NFRs)
- Draw a high-level component diagram
- Define key API contracts
- Create sequence diagrams for critical flows
- Document decisions and trade-offs in an ADR
- Suggest deployment topology (Docker Compose for dev, Kubernetes for prod)
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.
- 3d ago First seen · 55 lines · 0 tokens per session scan A 9cec50f00e88
architect is an agent published in the GitHub repository kumaran-is/claude-code-onboarding (35 stars, last pushed 2mo ago), licensed MIT. It adds 98 tokens to every session and 585 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 2026-08-30.
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