always-on

A rule that tells the coding agent to always follow a particular instruction.

In plain words
What is it for?
Applying a standing instruction whenever the agent edits or reviews code.
Why use it?
It keeps a required instruction in effect during the agent’s work.

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/futureexcited/vibe-rules/always-on
Clone the repo
git clone --depth 1 https://github.com/FutureExcited/vibe-rules

Made for: Cursor.

Per session 17 This file is loaded in full into every session.
When invoked 17 The same file — it is already loaded in full.
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 $0.00017 $0.00017
Opus 5 $0.00009 $0.00009
Sonnet 5 $0.00003 $0.00003
Haiku 4.5 $0.00002 $0.00002

Measured 3d ago against content hash 5ef8391ddc26, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

always-on 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 3d 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.

reference/cursor-rules-directory/.cursor/always-on.mdc · 6 lines

What it actually says

Always do this

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. 3d ago First seen · 6 lines · 17 tokens per session scan A 5ef8391ddc26

Subscribe to this mod's changes

always-on is a cursor rule published in the GitHub repository FutureExcited/vibe-rules (529 stars, last pushed 1y ago), licensed MIT. It adds 17 tokens to every session, about $0.0001 per session on Opus 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.