03-modules

A set of project-specific rules for Go code, where Go is a programming language. It describes module boundaries, constructors, configuration, workflow libraries, and files that must not be opened.

In plain words
What is it for?
It guides implementation and testing across Go modules, including constructor patterns, environment settings, workflow usage, and module-level tests.
Why use it?
It prevents changes that conflict with the repository's package structure, preferred libraries, configuration conventions, or protected generated files.

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/clubpay/ronykit/03-modules
Clone the repo
git clone --depth 1 https://github.com/clubpay/ronykit

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 232 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 $0.00232
Opus 5 $0.00000 $0.00116
Sonnet 5 $0.00000 $0.00046
Haiku 4.5 $0.00000 $0.00023

Measured yesterday against content hash 6eb358658fda, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

03-modules 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/03-modules.mdc · 16 lines

What it actually says

std/ and x/ modules

  • Every directory here has its own go.mod; respect module boundaries and test with cd <module> && go test ./....
  • Constructors follow the gateway pattern: New(opts ...Option) (T, error) plus MustNew(opts ...Option) T that panics on error. Unset config fields may be filled from environment variables — list any new one in .env.example.
  • Prefer RonyKit packages over third-party/stdlib substitutes where an equivalent exists (x/rkit, x/di, x/settings, x/telemetry/*, rony/errs).
  • Workflows go through flow — do not import go.temporal.io/sdk directly.
  • Never open x/apidoc/internal/swagger-ui/ or x/apidoc/internal/redoc-ui/; they are vendored minified bundles served via go:embed.

Deep reference: AGENTS.md (std module conventions).

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 · 16 lines · 0 tokens per session scan A 6eb358658fda

Subscribe to this mod's changes

03-modules is a cursor rule published in the GitHub repository clubpay/ronykit (38 stars, last pushed 3d ago), licensed BSD-3-Clause. It costs nothing until one of its globs matches a file; then it loads 232 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 2026-08-30.