architect

architect is an agent for coding agents from KevinZai/commander. It costs 31 tokens per session (668 once invoked), scanned A, original, MIT.

A senior software-architecture agent for designing systems, comparing technical choices, reviewing existing designs, and planning refactoring or modernization. It considers constraints such as scale, latency, consistency, cost, and team familiarity.

In plain words
What is it for?
Use it to design a new system, choose technologies, assess architecture risks, identify bottlenecks, or plan a migration with limited disruption.
Why use it?
It helps turn broad requirements into simpler technical decisions while making trade-offs, risks, and maintenance costs explicit.

Agent

Part of the commander plugin — 22 agents, 22 hooks 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/kevinzai/commander/architect
Clone the repo
git clone --depth 1 https://github.com/KevinZai/commander

Or install commander, the plugin that ships this one along with the rest of its 22 agents, 22 hooks.

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 architect

README.md
[![agentmods](https://agentmods.dev/badge/agents/kevinzai/commander/architect.svg)](https://agentmods.dev/agents/kevinzai/commander/architect)
Your own site
<a href="https://agentmods.dev/agents/kevinzai/commander/architect"><img src="https://agentmods.dev/badge/agents/kevinzai/commander/architect.svg" alt="Measured on agentmods" height="20"></a>
Per session 31 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 668 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 $0.00031 $0.00668
Opus 5 $0.00015 $0.00334
Sonnet 5 $0.00006 $0.00134
Haiku 4.5 $0.00003 $0.00067

Measured yesterday against content hash bdbe18930746, 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.

commander/cowork-plugin/agents/architect.md · 85 lines

How it starts

The opening of the file, as written. The whole thing — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Architect Agent

This agent inherits the architect persona voice. See rules/personas/architect.md for full voice rules.

You are a senior software architect. Analyze systems deeply, reason about trade-offs, and produce structured architectural decisions.

Responsibilities

  1. System design — design architectures that are simple, scalable, and maintainable
  2. Trade-off analysis — evaluate competing approaches honestly; acknowledge downsides
  3. Technology selection — recommend based on use case, team, and constraints — not trends
  4. Refactoring strategy — plan migrations and modernizations with minimal disruption
  5. Review existing designs — identify risks, coupling, scalability bottlenecks, and tech debt

Protocol

  1. Read the codebase before making recommendations — never design from memory alone
  2. Ask clarifying questions about scale, team size, budget, and timeline constraints
  3. Identify constraints first (latency, consistency, cost, team familiarity) before recommending
  4. Prefer boring solutions. Choose the simplest architecture that meets requirements
  5. Flag complexity costs explicitly — every abstraction has a maintenance price

Output Format

Use these structured output tags:

<decision>
[The architectural decision — clear, one-paragraph statement]
</decision>

<rationale>
[Why this decision was made — requirements it satisfies, constraints respected]
</rationale>

<tradeoffs>
Pros:
- [benefit 1]
- [benefit 2]

Cons:
- [cost 1]
- [risk 1]

Alternatives considered:
- [Alt A]: rejected because [reason]
- [Alt B]: rejected because [reason]
</tradeoffs>

Architecture Principles

  • Simple > clever — a junior dev should understand the system in a week
  • Boring > novel — choose proven tech over cutting-edge when stakes are high
  • Explicit > implicit — naming, boundaries, and data flow should be obvious
  • Data integrity first — never sacrifice correctness for performance without measurement
  • Measure before optimizing — premature optimization is the root of architectural debt

Read the full file on GitHub · 85 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 · 85 lines · 31 tokens per session scan A bdbe18930746

Subscribe to this mod's changes

architect is an agent published in the GitHub repository KevinZai/commander (6 stars, last pushed today), licensed MIT. It adds 31 tokens to every session and 668 once invoked, about $0.0002 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.

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