ar

ar is a cursor rule for Cursor from Ocean-Industries-Concept-Lab/openbridge-webcomponents. It costs 0 tokens per session (1,729 once invoked), scanned A, original, Apache-2.0.

A set of web components for placing points of interest over a live video or image. Markers can follow detected objects, avoid overlapping, and open cards when selected.

In plain words
What is it for?
Use it to build augmented-reality-style overlays, object markers, clustered targets, and interactive information cards on videos or images.
Why use it?
It separates media positioning, layer selection, overlap handling, and target display so these concerns do not interfere with one another.

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/ocean-industries-concept-lab/openbridge-webcomponents/ar
Clone the repo
git clone --depth 1 https://github.com/Ocean-Industries-Concept-Lab/openbridge-webcomponents

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 ar

README.md
[![agentmods](https://agentmods.dev/badge/rules/ocean-industries-concept-lab/openbridge-webcomponents/ar.svg)](https://agentmods.dev/rules/ocean-industries-concept-lab/openbridge-webcomponents/ar)
Your own site
<a href="https://agentmods.dev/rules/ocean-industries-concept-lab/openbridge-webcomponents/ar"><img src="https://agentmods.dev/badge/rules/ocean-industries-concept-lab/openbridge-webcomponents/ar.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 1,729 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 $0.01729
Opus 5 $0.00000 $0.00864
Sonnet 5 $0.00000 $0.00346
Haiku 4.5 $0.00000 $0.00173

Measured 4d ago against content hash 349f279c3d8b, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

ar 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.

.cursor/rules/ar.mdc · 135 lines

How it starts

The opening of the file, as written. The whole thing — 135 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AR / POI Overlay Components

The AR family renders points of interest over a live video or still image: markers that track detected objects, resolve their own overlaps, and expand into cards on interaction.

Every component here carries full class JSDoc, and Storybook autodocs surfaces it. This file covers what no single component's JSDoc can: how the pieces compose, and the traps that only show up across the family.

Layering

Five levels, outermost first. Each owns exactly one concern; pushing logic up or down the stack is the usual cause of bugs here.

<obc-poi-controller>          geometry: maps detection coordinates onto the media
  └─ media slot: <video> / <img>
  └─ <obc-poi-layer-stack>    selection across layers
       └─ <obc-poi-layer>     overlap resolution + layer height
            ├─ <obc-poi-data> a target
            └─ <obc-poi-group> a cluster of targets
  • obc-poi-controller — the only component that knows about the media. It observes the slotted <video>/<img>, tracks natural vs rendered size, and applies fit (contain | cover) so marker coordinates land on the right pixels. It also filters detections by confidenceMin and classFilter, and drives frameIndex for frame-by-frame playback. Nothing below it should read media dimensions.
  • obc-poi-layer-stack — coordinates selection across sibling layers via selection-mode, emitting layer-selection-changed.
  • obc-poi-layer — resolves overlaps and reports its computed height. This is where most layout behaviour lives.
  • obc-poi-group — one cluster: collapsed trigger ↔ expanded spread.
  • obc-poi-data / -vessel / -aton — individual targets.

Overlap resolution: two strategies, not one

obc-poi-layer's overlapMode picks between two genuinely different algorithms, each with its own helper module. They do not share state, and a change to one does not affect the other:

Read the full file on GitHub · 135 lines

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 · 135 lines · 0 tokens per session scan A 349f279c3d8b

Subscribe to this mod's changes

ar is a cursor rule published in the GitHub repository Ocean-Industries-Concept-Lab/openbridge-webcomponents (91 stars, last pushed today), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 1,729 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 2026-08-30.