packages-projects

packages-projects is a cursor rule for Cursor from synmux/myriad. It costs 405 tokens per session, scanned A, original, MIT.

A set of rules for choosing package and project managers: tools that install dependencies, run commands, and maintain project environments. It specifies Bun for JavaScript and TypeScript and uv for Python.

In plain words
What is it for?
Use it when installing dependencies, running scripts, configuring Cloudflare Worker types, or managing Python environments and lockfiles.
Why use it?
It prevents teams and agents from using inconsistent setup commands or package-management tools across projects.

Cursor rule for Cursor

Written for Cursor: a Cursor rule (.mdc).

Good fit Use it when installing dependencies, running scripts, configuring Cloudflare Worker types, or managing Python environments and lockfiles.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/synmux/myriad/packages-projects
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/synmux/myriad

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.

agentmods badge for packages-projects

README.md
[![agentmods](https://agentmods.dev/badge/rules/synmux/myriad/packages-projects/github.svg)](https://agentmods.dev/rules/synmux/myriad/packages-projects)
Your own site
<a href="https://agentmods.dev/rules/synmux/myriad/packages-projects"><img src="https://agentmods.dev/badge/rules/synmux/myriad/packages-projects/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 packages-projects

Your own site · 80×15
<a href="https://agentmods.dev/rules/synmux/myriad/packages-projects"><img src="https://agentmods.dev/badge/rules/synmux/myriad/packages-projects.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 405 This file is loaded in full into every session.
When invoked 405 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00405 $0.00405
Opus 5.5 $0.00162 $0.00162
Sonnet 5.5 $0.00081 $0.00081
Haiku 4.5 $0.00040 $0.00040

Measured 1mo ago against content hash 510ad55e6dbe, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

packages-projects 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 1mo 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.

configuration/cursor/rules/packages-projects.mdc · 43 lines

What it actually says

Package Managers

JavaScript/TypeScript

Use bun for package management. In package.json scripts, use bun run prefix.

If the package.json script cf-typegen exists, add types as an alias to it with bun run cf-typegen.

If this is a Cloudflare Worker or worker-configuration.d.ts exists, run bun types after any modifications to wrangler.jsonc or wrangler.toml (or any configuration change).

Python

Use uv for project initialization and management. Prefer manager-agnostic directives in package definitions; use uv-specific directives only when generic options aren't feasible.

  • Run things with uv run. If you have a command name created in pyproject.toml, you can do uv run COMMANDNAME.
  • Update packages with uv sync.

uv subcommands:

  • run: Run a command or script
  • init: Create a new project
  • add: Add dependencies to the project
  • remove: Remove dependencies from the project
  • sync: Update the project's environment
  • lock: Update the project's lockfile
  • export: Export the project's lockfile to an alternate format
  • tree: Display the project's dependency tree
  • tool: Run and install commands provided by Python packages
  • python: Manage Python versions and installations
  • pip: Manage Python packages with a pip-compatible interface
  • venv: Create a virtual environment
  • build: Build Python packages into source distributions and wheels
  • publish: Upload distributions to an index
  • cache: Manage uv's cache
  • self: Manage the uv executable
  • version: Read or update the project's version
  • help: Display documentation for a command
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. 1mo ago First seen · 43 lines · 405 tokens per session scan A 510ad55e6dbe

Subscribe to this mod's changes

packages-projects is a cursor rule published in the GitHub repository synmux/myriad (2 stars, last pushed today), licensed MIT. It adds 405 tokens to every session, about $0.0016 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 2026-08-31.