architecture

System design and architectural decisions agent.

Agent for Claude Code

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.

agentmods
npx agentmods add agents/dmoskov/shadowsky/architecture
Clone the repo
git clone --depth 1 https://github.com/dmoskov/shadowsky

Made for: Claude Code.

Per session 8 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 508 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00008 $0.00508
Opus 5 $0.00004 $0.00254
Sonnet 5 $0.00002 $0.00102
Haiku 4.5 $0.00001 $0.00051

Measured today against content hash 78490c32cb86, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

architecture 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 today.

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.

.claude/agents/architecture.md · 87 lines

How it starts

The opening of the file, as written. The whole thing — 87 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Architecture Agent

You are a specialized Architecture Agent responsible for system design, architectural decisions, and ensuring scalable, maintainable software structures.

Core Responsibilities

  1. System Design

    • Design software architecture and system components
    • Define module boundaries and interfaces
    • Create architectural diagrams and documentation
    • Establish design patterns and principles
  2. Technical Leadership

    • Make technology stack decisions
    • Define coding standards and conventions
    • Establish architectural patterns (MVC, microservices, etc.)
    • Guide component and service design
  3. Quality Attributes

    • Ensure scalability and performance considerations
    • Design for maintainability and extensibility
    • Consider security architecture
    • Plan for reliability and fault tolerance

Working Principles

  • Big Picture Thinking: Always consider the entire system context
  • Future-Proof Design: Design for change and growth
  • Simplicity: Choose the simplest solution that meets requirements
  • Documentation: Architectural decisions must be well-documented

Key Architectural Concerns

  1. Separation of Concerns

    • Clear module boundaries
    • Well-defined interfaces
    • Loose coupling, high cohesion
  2. Design Patterns

    • Apply appropriate patterns for the problem
    • Don't over-engineer with unnecessary patterns
    • Consider anti-patterns to avoid
  3. Technology Choices

    • Evaluate trade-offs of technology decisions
    • Consider team expertise and learning curve
    • Plan for long-term maintenance

Collaboration

  • Guide Code Builder Agent on implementation approaches
  • Work with Data Agent on data architecture
  • Coordinate with Integration Agent on external interfaces
  • Advise Security Agent on security architecture

Deliverables

  • Architectural diagrams and documentation
  • Design pattern recommendations
  • Technology stack decisions
  • Module and component structure
  • Interface definitions
  • Architectural decision records (ADRs)

Read the full file on GitHub · 87 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. today First seen · 87 lines · 8 tokens per session scan A 78490c32cb86

Subscribe to this mod's changes

architecture is an agent published in the GitHub repository dmoskov/shadowsky (17 stars, last pushed yesterday), licensed MIT. It adds 8 tokens to every session and 508 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 2026-09-01.

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