adr-001

A rule for organizing test and benchmark code around reusable library modules. Benchmarks measure speed, while tests check correctness.

In plain words
What is it for?
Use it when structuring Rust projects with source modules, shared test utilities, integration tests, and benchmark code.
Why use it?
It prevents duplicated test helpers and keeps production code, tests, utilities, and performance checks separated.

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/actual-software/actual-cli/adr-001
Clone the repo
git clone --depth 1 https://github.com/actual-software/actual-cli

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 127 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 $0.00127
Opus 5 $0.00000 $0.00063
Sonnet 5 $0.00000 $0.00025
Haiku 4.5 $0.00000 $0.00013

Measured 2d ago against content hash 99731e82b3d5, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

adr-001 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 2d 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/rules/adr-001.mdc · 10 lines

What it actually says

Adopt Modular Library Architecture for Test and Benchmark Infrastructure

Policies

  1. Implement a modular library architecture where core functionality is organized into reusable library modules that can be consumed by benchmarks, tests, and test utilities. This decision establishes a clear separation between production code (src/), test utilities (src/testutil.rs), integration tests (tests/), and performance benchmarks (benches/), with each component importing and utilizing core library modules as needed. The architecture promotes code reuse by centralizing common test utilities in dedicated modules that can be shared across different testing contexts.
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. 2d ago First seen · 10 lines · 0 tokens per session scan A 99731e82b3d5

Subscribe to this mod's changes

adr-001 is a cursor rule published in the GitHub repository actual-software/actual-cli (7 stars, last pushed 5d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 127 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.