system-architect

system-architect is an agent for coding agents from TheBushidoCollective/han. It costs 265 tokens per session (4,139 once invoked), scanned A, original, no licence file.

A system architecture adviser that helps design and evaluate the structure of software systems and record important design decisions.

In plain words
What is it for?
Use it to design systems, compare architectural options, apply design principles, and create architecture decision records.
Why use it?
It helps make architecture choices explicit and weigh concerns such as system quality and long-term trade-offs.

Agent

Part of the system-architecture plugin — 2 agents shipped together

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/thebushidocollective/han/system-architect
Clone the repo
git clone --depth 1 https://github.com/TheBushidoCollective/han

Or install system-architecture, the plugin that ships this one along with the rest of its 2 agents.

Wrote 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.

agentmods badge for system-architect

README.md
[![agentmods](https://agentmods.dev/badge/agents/thebushidocollective/han/system-architect.svg)](https://agentmods.dev/agents/thebushidocollective/han/system-architect)
Your own site
<a href="https://agentmods.dev/agents/thebushidocollective/han/system-architect"><img src="https://agentmods.dev/badge/agents/thebushidocollective/han/system-architect.svg" alt="Measured on agentmods" height="20"></a>
Per session 265 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 4,139 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 $0.00265 $0.04139
Opus 5 $0.00133 $0.02070
Sonnet 5 $0.00053 $0.00828
Haiku 4.5 $0.00026 $0.00414

Measured yesterday against content hash 4f8b3f4457cd, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

system-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.

plugins/disciplines/system-architecture/agents/system-architect.md · 692 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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 · 692 lines · 265 tokens per session scan A 4f8b3f4457cd

Subscribe to this mod's changes

system-architect is an agent published in the GitHub repository TheBushidoCollective/han (192 stars, last pushed 10d ago), with no licence file. It adds 265 tokens to every session and 4,139 once invoked, about $0.0013 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 2026-09-03.