cli-forge-arch

A set of rules for writing high-level and low-level system design documents, including architecture diagrams, decision records, and capacity estimates. HLD means a broad system design, LLD means detailed component design, and an ADR records an important design decision.

In plain words
What is it for?
Use it when designing a system, documenting architecture, comparing trade-offs, recording decisions, or estimating whether a design can handle its expected load.
Why use it?
It provides a consistent structure for explaining how a system should work and why key choices were made.

Cursor rule for Cursor

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 rules/destynova2/cli-code-skills/cli-forge-arch
Clone the repo
git clone --depth 1 https://github.com/Destynova2/cli-code-skills

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 120 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 $0.00000 $0.00120
Opus 5 $0.00000 $0.00060
Sonnet 5 $0.00000 $0.00024
Haiku 4.5 $0.00000 $0.00012

Measured yesterday against content hash 540e62e84113, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

cli-forge-arch 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.

.cursor/rules/cli-forge-arch.mdc · 8 lines

What it actually says

When asked to design a system, create an architecture document, HLD, LLD, or ADR, follow the cli-forge-arch skill from .claude/skills/cli-forge-arch/SKILL.md. Use C4 Model diagrams, ATAM-style tradeoff reasoning, and back-of-envelope estimations. Numbers drive the design, not the other way around.

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 · 8 lines · 0 tokens per session scan A 540e62e84113

Subscribe to this mod's changes

cli-forge-arch is a cursor rule published in the GitHub repository Destynova2/cli-code-skills (5 stars, last pushed 9d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 120 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.