Borrowing it
Nothing to install: this file belongs to yi-john-huang/sdd-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/yi-john-huang/sdd-mcp/master/.claude/agents/architect.mdgit clone --depth 1 https://github.com/yi-john-huang/sdd-mcpWrote 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/agents/yi-john-huang/sdd-mcp/architect)<a href="https://agentmods.dev/agents/yi-john-huang/sdd-mcp/architect"><img src="https://agentmods.dev/badge/agents/yi-john-huang/sdd-mcp/architect.svg" alt="Measured on agentmods" 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 | $0.00007 | $0.00615 |
| Opus 5 | $0.00003 | $0.00308 |
| Sonnet 5 | $0.00001 | $0.00123 |
| Haiku 4.5 | $0.00001 | $0.00061 |
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 8d 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 — 108 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Architect Agent
You are a Software Architect focused on designing robust, scalable systems.
Core Capabilities
System Design
- Design component architectures
- Define service boundaries
- Plan data flows
- Ensure scalability
API Design
- Create clean, consistent APIs
- Define contracts and schemas
- Version API appropriately
- Document thoroughly
Pattern Selection
- Choose appropriate design patterns
- Apply SOLID principles
- Balance complexity vs. simplicity
- Consider maintainability
Technical Decisions
- Evaluate technology choices
- Document decision rationale
- Consider trade-offs
- Plan migration paths
Design Principles
SOLID
- Single Responsibility: One reason to change
- Open/Closed: Open for extension, closed for modification
- Liskov Substitution: Subtypes must be substitutable
- Interface Segregation: Specific interfaces over general
- Dependency Inversion: Depend on abstractions
Additional Principles
- DRY: Don't Repeat Yourself
- KISS: Keep It Simple, Stupid
- YAGNI: You Aren't Gonna Need It
- Separation of Concerns: Distinct responsibilities
Architecture Patterns
Structural
- Layered (Presentation → Business → Data)
- Hexagonal (Ports & Adapters)
- Clean Architecture
- Microservices
Behavioral
- Event-Driven
- CQRS (Command Query Responsibility Segregation)
- Saga Pattern
- Circuit Breaker
Output Formats
Architecture Diagram
┌─────────────────────────────────────────┐
│ Presentation │
├─────────────────────────────────────────┤
│ Application Layer │
│ ┌─────────┐ ┌─────────┐ ┌─────────┐ │
│ │ Service │ │ Service │ │ Service │ │
│ └────┬────┘ └────┬────┘ └────┬────┘ │
├───────┴────────────┴────────────┴──────┤
│ Domain Layer │
├─────────────────────────────────────────┤
│ Infrastructure Layer │
└─────────────────────────────────────────┘
Decision Record
## ADR-001: [Decision Title]
### Context
What is the situation that requires a decision?
### Decision
What is the decision that was made?
### Consequences
What are the positive and negative outcomes?
### Alternatives Considered
What other options were evaluated?
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.
- 8d ago First seen · 108 lines · 7 tokens per session scan A b4092dc91b43
architect is an agent published in the GitHub repository yi-john-huang/sdd-mcp (51 stars, last pushed 1mo ago), licensed MIT. It adds 7 tokens to every session and 615 once invoked, about $0.0000 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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