A set of dependency-boundary rules for a monorepo, which is one repository containing multiple related packages and applications. It assigns package categories and restricts which categories may depend on others.

It helps enforce application, library, configuration, and shared-contract boundaries, including rules for Worker-to-Worker communication.

It catches unwanted imports and dependency cycles before they spread through the codebase or fail later in production.

boundaries — Cursor rule for Cursor by louisbrulenaudet

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.

Clone the repo

git clone --depth 1 https://github.com/louisbrulenaudet/monorepo-template

Made for: 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.

README.md

[![agentmods](https://agentmods.dev/badge/rules/louisbrulenaudet/monorepo-template/boundaries/github.svg)](https://agentmods.dev/rules/louisbrulenaudet/monorepo-template/boundaries)

Your own site

<a href="https://agentmods.dev/rules/louisbrulenaudet/monorepo-template/boundaries"><img src="https://agentmods.dev/badge/rules/louisbrulenaudet/monorepo-template/boundaries/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.

Your own site · 80×15

<a href="https://agentmods.dev/rules/louisbrulenaudet/monorepo-template/boundaries"><img src="https://agentmods.dev/badge/rules/louisbrulenaudet/monorepo-template/boundaries.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 452 This file is loaded in full into every session.

When invoked 452 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00452	$0.00452
Opus 5.5	$0.00181	$0.00181
Sonnet 5.5	$0.00090	$0.00090
Haiku 4.5	$0.00045	$0.00045

Measured 28d ago against content hash a5c9398d9a89, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

boundaries 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 28d 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/core/boundaries.mdc · 24 lines

What it actually says

Package Boundaries

Root turbo.json boundaries.tags is enforced: pnpm boundaries (inside pnpm run ci) fails on a violation. This rule is the rationale.

Tag	Packages	May depend on
`app`	every `front-` / `worker-` / `queue-` / `webhook-` / `mcp-*`	`contracts`, `contracts-base`, `framework`, `lib`, `config`
`framework`	`@repo/hono-middleware`	`contracts-base`, `config`, `lib`
`contracts`	`@repo/dtos-common`	`contracts-base`, `config`
`contracts-base`	`@repo/enums-common`	`config`
`lib`	none today	`config`
`config`	`@repo/typescript-config`, `@repo/vitest-config`	nothing internal

Nothing depends on an app: app.dependents.deny lists every tag, app included, so apps are entry points only. Worker-to-Worker calls are service-binding RPC by Worker name (service-bindings.mdc), never a package import - including of another app's cloudflare.config.ts, which the cf docs' typed defineWorker pattern needs.
The contract chain cannot invert: allow-lists make enums → dtos the only direction, so it cannot become a cycle.
framework is glue only apps consume: it needs AppEnvironment and the CORS header names from contracts-base, and its dependents.deny keeps a Hono dependency out of lib and the contracts chain.
A new package declares its tag: turbo.json with "extends": ["//"] and a tags entry, or pnpm boundaries reports it untagged.

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.

28d ago Changed · -6 lines · -70 tokens per session a5c9398d9a89
29d ago Changed · +2 lines · +96 tokens per session 78bb0900776c
1mo ago Changed · +1 lines · +11 tokens per session 158bcb2a32ce
1mo ago Changed 51bb4dd209f3
1mo ago First seen · 27 lines · 415 tokens per session scan A 6f66ae265a3b

Subscribe to this mod's changes

boundaries is a cursor rule published in the GitHub repository louisbrulenaudet/monorepo-template (19 stars, last pushed 2d ago), licensed Apache-2.0. It adds 452 tokens to every session, about $0.0018 per session on Opus 5.5. 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.

Backend and APIs Claude Code agent ai-agents cloudflare cloudflare-workers cursor

boundaries

Getting it into your agent

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Nothing flagged

What it actually says

Package Boundaries

What this file has done since we first saw it

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