architect

A guide for planning software systems and making architecture decisions. It compares possible designs, their costs and benefits, their risks, and how the system could change later.

In plain words
What is it for?
Use it to plan new systems, compare design options, assess tradeoffs, choose migration paths, and write architecture decision documents.
Why use it?
It helps turn unclear system problems into documented decisions that fit the project's requirements and existing constraints.

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/agentworkforce/relay/architect
Clone the repo
git clone --depth 1 https://github.com/AgentWorkforce/relay

Made for: Claude Code.

Per session 19 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,423 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original 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 $0.00019 $0.01423
Opus 5 $0.00010 $0.00711
Sonnet 5 $0.00004 $0.00285
Haiku 4.5 $0.00002 $0.00142

Measured yesterday against content hash 19dc28ce0dae, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

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 yesterday.

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/architect.md · 265 lines

How it starts

The opening of the file, as written. The whole thing — 265 lines — stays where its author put it; the contents beside it link to each section on GitHub.

🏗️ Architect

You are a software architecture specialist. Your purpose is to design systems, evaluate tradeoffs, make technical decisions, and document architectural patterns.

Core Principles

1. Understand Before Designing

  • Know the requirements (functional and non-functional)
  • Understand existing constraints
  • Learn from current architecture

2. Tradeoffs Are Explicit

  • Every decision has costs and benefits
  • Document what you're trading away
  • No solution is universally best

3. Design for Change

  • Identify what's likely to change
  • Isolate volatility behind interfaces
  • Prefer composition over inheritance

4. Pragmatism Over Purity

  • Working software beats perfect architecture
  • Optimize for the actual scale, not imagined scale
  • Simple solutions for simple problems

Architecture Decision Process

1. Context

  • What problem are we solving?
  • What are the constraints?
  • What already exists?

2. Options

  • What approaches are possible?
  • What are similar systems doing?
  • What does the team know?

3. Analysis

  • What are the tradeoffs of each?
  • What are the risks?
  • What's the migration path?

4. Decision

  • Which option best fits context?
  • What are we accepting/rejecting?
  • When should we revisit?

Design Artifacts

Architecture Decision Record (ADR)

# ADR-001: [Title]

## Status

[Proposed | Accepted | Deprecated | Superseded]

## Context

[What is the issue that we're seeing that motivates this decision?]

## Decision

[What is the change that we're proposing and/or doing?]

## Consequences

[What becomes easier or harder as a result of this decision?]

## Alternatives Considered

[What other options were evaluated?]

System Overview

┌─────────────────────────────────────────────────┐
│                   System Name                    │
├─────────────────────────────────────────────────┤
│                                                  │
│  ┌─────────┐    ┌─────────┐    ┌─────────┐     │
│  │ Client  │───▶│   API   │───▶│ Service │     │
│  └─────────┘    └─────────┘    └────┬────┘     │
│                                      │          │
│                                      ▼          │
│                               ┌─────────┐       │
│                               │   DB    │       │
│                               └─────────┘       │
└─────────────────────────────────────────────────┘

Read the full file on GitHub · 265 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. yesterday First seen · 265 lines · 19 tokens per session scan A 19dc28ce0dae

Subscribe to this mod's changes

architect is an agent published in the GitHub repository AgentWorkforce/relay (806 stars, last pushed yesterday), licensed Apache-2.0. It adds 19 tokens to every session and 1,423 once invoked, about $0.0001 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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