Guidelines for configuring environment variables, which are settings supplied outside the source code. They cover separate settings for development, testing, and production, especially for secrets and required values.

It helps name, validate, document, organize, and protect environment settings across local development, tests, and deployments.

It reduces configuration mistakes and helps prevent passwords or API keys from being committed to version control.

environment — Cursor rule for Cursor by lacymorrow/paperclip-hub

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/lacymorrow/paperclip-hub

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/lacymorrow/paperclip-hub/environment/github.svg)](https://agentmods.dev/rules/lacymorrow/paperclip-hub/environment)

Your own site

<a href="https://agentmods.dev/rules/lacymorrow/paperclip-hub/environment"><img src="https://agentmods.dev/badge/rules/lacymorrow/paperclip-hub/environment/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/lacymorrow/paperclip-hub/environment"><img src="https://agentmods.dev/badge/rules/lacymorrow/paperclip-hub/environment.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 0 Nothing until a file matches its globs; then the whole rule loads.

When invoked 401 The whole file, excluding the scripts and references it only reads on demand.

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	$0.00000	$0.00401
Opus 5.5	$0.00000	$0.00160
Sonnet 5.5	$0.00000	$0.00080
Haiku 4.5	$0.00000	$0.00040

Measured yesterday against content hash e0c47e95d6d1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

environment 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/environment.mdc · 97 lines

What it actually says

Environment Configuration Best Practices

Environment Files

Use .env.local for local development
Use .env.development for development
Use .env.test for testing
Use .env.production for production
Never commit env files
Document all variables
Use example files

Variable Naming

Use SCREAMING_SNAKE_CASE
Use descriptive names
Group related variables
Use proper prefixes
Document purpose
Consider scope
Maintain consistency

Security

Never commit secrets
Use proper encryption
Rotate secrets regularly
Use secret management
Audit access
Monitor usage
Document procedures

Validation

Validate at startup
Check required variables
Validate formats
Type checking
Document requirements
Handle missing values
Log validation errors

Organization

Group by purpose
Use proper prefixes
Document structure
Maintain consistency
Version control
Review regularly
Keep organized

Development

Use local overrides
Document setup
Share examples
Handle conflicts
Maintain parity
Test configurations
Document workflows

Production

Use proper secrets
Configure monitoring
Set up logging
Handle rotation
Plan for scaling
Document deployment
Regular audits

Testing

Use test-specific values
Mock when needed
Clean up after tests
Validate configurations
Document test setup
Maintain isolation
Regular validation

Documentation

Document all variables
Explain purpose
Show examples
Document requirements
Keep updated
Version control
Regular reviews

Management

Use secret management
Configure access control
Monitor usage
Regular rotation
Audit access
Document procedures
Plan for emergencies

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.

yesterday First seen · 97 lines · 0 tokens per session scan A e0c47e95d6d1

Subscribe to this mod's changes

environment is a cursor rule published in the GitHub repository lacymorrow/paperclip-hub (15 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 401 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 2026-11-10.

DevOps and cloud Security ai-agents drizzle-orm nextjs paperclip payload-cms plugin-registry

environment next to 6 cursor rules from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
environmentlacymorrow/paperclip-hub	Cursor rule	15	yesterday	MIT	A	0	Cursor
always-push-pritsmemeworks/adhx	Cursor rule	19	5d ago	MIT	A	279	Cursor
codex-premium-website-skillsTheGoat395/Codex-Skills	Cursor rule	137	20d ago	MIT	A	0	Cursor
context-managementvibestackdev/vibe-stack	Cursor rule	8	yesterday	MIT	A	0	Cursor
project-contextvibestackdev/vibe-stack	Cursor rule	8	yesterday	MIT	A	508	Cursor
typescript-coding-styleWebDevPeterGriffin/The-VibeCode-Bible	Cursor rule	42	7d ago	none	A	128	Cursor
javascript-typescript-code-styleWebDevPeterGriffin/The-VibeCode-Bible	Cursor rule	42	7d ago	none	A	88	Cursor

environment

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

Environment Configuration Best Practices

Environment Files

Variable Naming

Security

Validation

Organization

Development

Production

Testing

Documentation

Management

What this file has done since we first saw it

environment compared with cursor rules from other repositories