always-attached-h3-description

always-attached-h3-description is a cursor rule for coding agents from zackiles/cursor-config. It costs 40 tokens per session, scanned A, original, MIT.

An automatically attached rule whose main useful description comes from an H3 heading, a third-level document heading, because H1 and H2 headings are absent.

In plain words
What is it for?
Supplying the primary description for content that has an H3 heading but no H1 or H2 heading.
Why use it?
It preserves useful heading context when higher-level headings are missing.

Cursor rule

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/zackiles/cursor-config/always-attached-h3-description
Clone the repo
git clone --depth 1 https://github.com/zackiles/cursor-config

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 always-attached-h3-description

README.md
[![agentmods](https://agentmods.dev/badge/rules/zackiles/cursor-config/always-attached-h3-description.svg)](https://agentmods.dev/rules/zackiles/cursor-config/always-attached-h3-description)
Your own site
<a href="https://agentmods.dev/rules/zackiles/cursor-config/always-attached-h3-description"><img src="https://agentmods.dev/badge/rules/zackiles/cursor-config/always-attached-h3-description.svg" alt="Measured on agentmods" height="20"></a>
Per session 40 This file is loaded in full into every session.
When invoked 40 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 $0.00040 $0.00040
Opus 5 $0.00020 $0.00020
Sonnet 5 $0.00008 $0.00008
Haiku 4.5 $0.00004 $0.00004

Measured 5d ago against content hash 12ff22a1a30f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

always-attached-h3-description 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 5d 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.

test/mocks/passing-rules/always-attached-h3-description.mdc · 8 lines

What it actually says

H3 Header

H3 Header Description. This should be the main description because an H1 and H2 are missing.

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. 5d ago First seen · 8 lines · 40 tokens per session scan A 12ff22a1a30f

Subscribe to this mod's changes

always-attached-h3-description is a cursor rule published in the GitHub repository zackiles/cursor-config (17 stars, last pushed 1y ago), licensed MIT. It adds 40 tokens to every session, about $0.0002 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.