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Arch4: Command for Claude Code

.cursor/commands/arch4-update.md

arch4-update is a command for Claude Code, Cursor from P451M/Arch4. It costs 0 tokens per session (531 once invoked), scanned A, original, no licence file.

A repository command for updating an Arch4 architecture model. The description does not explain what Arch4 is or what the update changes.

In plain words
What is it for?
Use it when this repository needs its Arch4 architecture model updated.
Why use it?
It is intended to keep that architecture model current, but the available description does not provide more detail.

Command for Claude CodeCursor

Written for Cursor and Claude Code: installed under .cursor/, but also a Claude Code command (commands/*.md).

This is P451M/Arch4's own configuration. It tells Claude Code and Cursor how to work on Arch4 itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything Arch4 configures →

not rated 4repo 4mo ago A scan 0 tokens custom licence
View source ↗ P451M/Arch4
Reuse

Borrowing it

Nothing to install: this file belongs to P451M/Arch4. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/P451M/Arch4/main/.cursor/commands/arch4-update.md
Clone the repo
git clone --depth 1 https://github.com/P451M/Arch4

Made for: Claude Code, Cursor.

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 arch4-update

README.md
[![agentmods](https://agentmods.dev/badge/commands/p451m/arch4/arch4-update/github.svg)](https://agentmods.dev/commands/p451m/arch4/arch4-update)
Your own site
<a href="https://agentmods.dev/commands/p451m/arch4/arch4-update"><img src="https://agentmods.dev/badge/commands/p451m/arch4/arch4-update/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.

agentmods 80×15 button for arch4-update

Your own site · 80×15
<a href="https://agentmods.dev/commands/p451m/arch4/arch4-update"><img src="https://agentmods.dev/badge/commands/p451m/arch4/arch4-update.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 531 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.00531
Opus 5.5 $0.00000 $0.00212
Sonnet 5.5 $0.00000 $0.00106
Haiku 4.5 $0.00000 $0.00053

Measured 2mo ago against content hash 05cc89c57cd7, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

arch4-update 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 2mo 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.

.cursor/commands/arch4-update.md · 29 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. 2mo ago First seen · 29 lines · 0 tokens per session scan A 05cc89c57cd7

Subscribe to this mod's changes

arch4-update is a command published in the GitHub repository P451M/Arch4 (4 stars, last pushed 4mo ago), with no licence file. It costs nothing until one of its globs matches a file; then it loads 531 tokens. 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 2026-08-31.

architecturearchitecture-mapc4cursordiagramsstructurizr
Related

arch4-update compared with commands from other repositories

arch4-update next to 6 commands from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
arch4-updateP451M/Arch4Command44mo agononeA0Claude Code, Cursor
arrange-workspace-flow-technical-contextgriddynamics/rosettaCommand370todayApache-2.0A19Claude Code
contrarianadonai-labs/agent-runwayCommand22d agoMITA44Claude Code
autonomous-leadadonai-labs/agent-runwayCommand22d agoMITA18Claude Code
iacadonai-labs/agent-runwayCommand22d agoMITA21Claude Code
leadadonai-labs/agent-runwayCommand22d agoMITA17Claude Code
architectadonai-labs/agent-runwayCommand22d agoMITA15Claude Code