architect

architect is a skill for Claude Code, Codex from ryanczak/rexyMCP. It costs 53 tokens per session (7,089 once invoked), scanned A, original, MIT.

A planning skill for the architect/executor workflow used by rexyMCP projects. It prepares a repository and writes documents describing the next work phase, while leaving execution and milestone approval to people.

In plain words
What is it for?
Use it to set up the workflow in a repository, design upcoming work, draft the next phase, or review progress toward a milestone.
Why use it?
It separates design decisions from implementation, so work can be planned and reviewed before an executor changes the code.

Skill for Claude CodeCodex

Part of the rexymcp plugin — 5 skills, 1 MCP server 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 skills/ryanczak/rexymcp/architect
Any agent
npx skills add ryanczak/rexyMCP --skill architect
Clone the repo
git clone --depth 1 https://github.com/ryanczak/rexyMCP

Made for: Claude Code, Codex.

Or install rexymcp, the plugin that ships this one along with the rest of its 5 skills, 1 MCP server.

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/skills/ryanczak/rexymcp/architect.svg)](https://agentmods.dev/skills/ryanczak/rexymcp/architect)
Your own site
<a href="https://agentmods.dev/skills/ryanczak/rexymcp/architect"><img src="https://agentmods.dev/badge/skills/ryanczak/rexymcp/architect.svg" alt="Measured on agentmods" height="20"></a>
Per session 53 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 7,089 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 5.1 $0.00053 $0.07089
Opus 5 $0.00026 $0.03544
Sonnet 5 $0.00011 $0.01418
Haiku 4.5 $0.00005 $0.00709

Measured 5d ago against content hash 61ebe0177d89, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, 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 5d 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.

plugin/skills/architect/SKILL.md · 536 lines

How it starts

The opening of the file, as written. The whole thing — 536 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Architect Skill

This skill drives the architect/executor split for rexyMCP projects. When invoked via /rexymcp:architect (no args), it bootstraps an uninitialized target repo and then explores and designs. When invoked via /rexymcp:architect next, it drafts the next phase doc. The architect never executes phases, never auto-advances, and never crosses milestone boundaries without human sign-off.

Read these first

Before any action, read the following from the plugin's own resources (not the target repo — those may not exist yet):

  1. <plugin-dir>/templates/STANDARDS.md — the engineering Definition of Done.
  2. <plugin-dir>/templates/WORKFLOW.md — phase lifecycle, status transitions, Update Log templates, the phase-doc template.
  3. docs/architecture.md — the rexyMCP design (this repo).
  4. docs/dev/milestones/M6-plugin/README.md — the active milestone.

The plugin directory is where this skill lives. Templates are at plugin/templates/STANDARDS.md and plugin/templates/WORKFLOW.md relative to the rexyMCP repo root. Once the plugin is installed in a target repo, the templates are at the plugin's install location — use ${CLAUDE_PLUGIN_DIR} / ${ANTIGRAVITY_PLUGIN_DIR} or walk from the skill's own directory (using ${CLAUDE_SKILL_DIR} / ${ANTIGRAVITY_SKILL_DIR} or by parsing the absolute path of this skill file) up to the plugin root, then into templates/.

1. Bootstrap routine (idempotent)

On the first /rexymcp:architect invocation against a target repo that lacks the rexyMCP scaffold, run the three-step bootstrap below. On re-invocation, check each artifact and only fill missing pieces.

Idempotency check

Before any step, check for these four artifacts in the target repo:

  • rexymcp.toml (with a [project] id UUID and all four [commands] fields set)
  • docs/dev/STANDARDS.md
  • docs/dev/WORKFLOW.md
  • REXYMCP.md and either a CLAUDE.md that imports it (@REXYMCP.md) or a .agents/AGENTS.md referencing it

Read the full file on GitHub · 536 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. 5d ago First seen · 536 lines · 53 tokens per session scan A 61ebe0177d89

Subscribe to this mod's changes

architect is a skill published in the GitHub repository ryanczak/rexyMCP (86 stars, last pushed 19d ago), licensed MIT. It adds 53 tokens to every session and 7,089 once invoked, about $0.0003 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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