A system-architecture agent for design decisions, cross-cutting concerns and technical planning across a monorepo, a repository containing multiple related projects.

Use it to design an API caching strategy or plan other system-wide technical changes.

It provides a place to work through design choices that affect several parts of a codebase rather than only one feature.

R-architect — Agent for Claude Code by Roxabi/roxabi-plugins

Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code

/plugin marketplace add Roxabi/roxabi-plugins

Claude Code

/plugin install dev-core

Made for: Claude Code.

Or install dev-core, the plugin that ships this one along with the rest of its 31 skills, 10 agents, 2 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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/roxabi/roxabi-plugins/r-architect/github.svg)](https://agentmods.dev/agents/roxabi/roxabi-plugins/r-architect)

Your own site

<a href="https://agentmods.dev/agents/roxabi/roxabi-plugins/r-architect"><img src="https://agentmods.dev/badge/agents/roxabi/roxabi-plugins/r-architect/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/agents/roxabi/roxabi-plugins/r-architect"><img src="https://agentmods.dev/badge/agents/roxabi/roxabi-plugins/r-architect.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 238 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 2,579 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00238	$0.02579
Opus 5.5	$0.00095	$0.01032
Sonnet 5.5	$0.00048	$0.00516
Haiku 4.5	$0.00024	$0.00258

Measured 26d ago against content hash fd1bfff2583a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

R-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 26d 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.

archived/plugins/dev-core/agents/R-architect.md · 170 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

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.

26d ago Changed fd1bfff2583a
1mo ago Changed c1547079c3b9
1mo ago Changed · +72 lines · +172 tokens per session 14d4fa6d318b
1mo ago Changed · +1 lines cdb837a93ef5
1mo ago First seen · 97 lines · 66 tokens per session scan A 2fa5160e9a58

Subscribe to this mod's changes

R-architect is an agent published in the GitHub repository Roxabi/roxabi-plugins (9 stars, last pushed today), licensed AGPL-3.0. It adds 238 tokens to every session and 2,579 once invoked, about $0.0010 per session on Opus 5.5. 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 2026-09-06.

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