subtitle-punctuation

subtitle-punctuation is a cursor rule for coding agents from saif-shines/technical-writing-cursor-rules. It costs 0 tokens per session (124 once invoked), scanned A, original, MIT.

A writing rule for subtitles, which are short supporting lines under headings. It requires subtitles in Markdown, MDX, and components to omit a full stop at the end.

In plain words
What is it for?
Use it when writing or reviewing subtitles such as explanatory lines beneath page headings, including text stored in Markdown or MDX files.
Why use it?
It keeps subtitle punctuation consistent across documentation and interface text. It prevents subtitles from being edited into a style the project has ruled out.

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/saif-shines/technical-writing-cursor-rules/subtitle-punctuation
Clone the repo
git clone --depth 1 https://github.com/saif-shines/technical-writing-cursor-rules

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 subtitle-punctuation

README.md
[![agentmods](https://agentmods.dev/badge/rules/saif-shines/technical-writing-cursor-rules/subtitle-punctuation.svg)](https://agentmods.dev/rules/saif-shines/technical-writing-cursor-rules/subtitle-punctuation)
Your own site
<a href="https://agentmods.dev/rules/saif-shines/technical-writing-cursor-rules/subtitle-punctuation"><img src="https://agentmods.dev/badge/rules/saif-shines/technical-writing-cursor-rules/subtitle-punctuation.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 124 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00000 $0.00124
Opus 5 $0.00000 $0.00062
Sonnet 5 $0.00000 $0.00025
Haiku 4.5 $0.00000 $0.00012

Measured 4d ago against content hash 7770b37ff9ab, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

subtitle-punctuation 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 4d 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.

principles/style/subtitle-punctuation.mdc · 18 lines

What it actually says

metadata: alwaysApply: true

Subtitle Punctuation Rules

No Trailing Period in Subtitles

  • Subtitles (including those in MD/MDX files and within components) must not end with a period (.)
  • This rule applies to all subtitle text, regardless of length or content.
  • Example:
    • Good: Integrate with Scalekit APIs using our official SDKs
    • Bad: Integrate with Scalekit APIs using our official SDKs.
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. 4d ago First seen · 18 lines · 0 tokens per session scan A 7770b37ff9ab

Subscribe to this mod's changes

subtitle-punctuation is a cursor rule published in the GitHub repository saif-shines/technical-writing-cursor-rules (7 stars, last pushed 1y ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 124 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 2026-08-31.