---
title: "Container Lines - Air Market"
description: "You want the structure of a layout to be visible: thin vertical lines showing where the content area ends, with small squares at the corners. This adds them. Reach for it when a page should look meas…"
canonical: "https://airmarket.ai/app/container-lines"
---

[Air Market](/) / [Design](/category/design) / Container Lines

Skill by [Meng To](/@mengto)

# Container Lines

Show where your layout's edges are, with quiet corner marks

## What this does

You want the structure of a layout to be visible: thin vertical lines showing where the content area ends, with small squares at the corners. This adds them. Reach for it when a page should look measured and editorial rather than floating in open space.

### Top 3 things it does for you

- Add vertical guide lines at container edges
- Mark corners with small squares
- Give an editorial layout visible grid markers

## Information

**Container Lines at a glance**

|  |  |
| --- | --- |
| Kind | Skill |
| Publisher | [Meng To](/@mengto) |
| Category | [Design](/category/design) |
| Works with | Agent Skills - an open standard supported by 40+ agents |
| Size | 2.7 MB |
| Licence | MIT |
| Repository | [MengTo/Skills](https://github.com/MengTo/Skills/tree/272528fec86a4c2a1678646511c474aa734d437e/agent-skills/web-design/container-lines) |
| GitHub stars | 5,235 (as of Nov 2026) |

## Security report

**Verified.** AIR scanned this exact version of Container Lines and flagged nothing. AIR's verdict: **safe**.

**What Container Lines's check was run against**

|  |  |
| --- | --- |
| Commit | 272528fec86a4c2a1678646511c474aa734d437e |
| Content hash | 63739d0367f9c1ac9efbee566057c6b499697826349dc1c427589b8268da3187 |
| Files read | [Browse the files at this exact commit](https://github.com/MengTo/Skills/blob/272528fec86a4c2a1678646511c474aa734d437e/agent-skills/web-design/container-lines/SKILL.md) |

A scan is named by the exact content it read, not by a version number. A different version is a different artifact, and nothing here applies to a version AIR has not scanned.

[Read the full security report for Container Lines](/security/container-lines)

## About Container Lines

This adds vertical container-size guide lines with mini corner squares, for precise and structured web layouts.

Use it when the ask is for container lines, measured layout guides, vertical boundary lines, editorial grid markers, or small corner-square frame details.

## What's inside

- SKILL.md - instructions
- demo/assets/page-01-65695f80-23f9-46ee-8487-cbb6c93cc48b-3840w.webp
- demo/assets/page-02-724142aa-44a6-48d3-9cf3-761e00d05b78-1600w.jpg
- demo/assets/page-03-4734259a-bad7-422f-981e-ce01e79184f2-1600w.jpg
- demo/assets/page-04-005600e5-f6ab-4e59-bc86-eaeb02797dfa-1600w.jpg
- demo/assets/page-05-e534354d-c5f2-4399-a1d9-2f50338e8c47-1600w.jpg
- demo/assets/page-06-fb6415fd-bf4d-4ccf-8e9d-7ab445e99207-1600w.jpg
- demo/assets/source-preview.jpg
- demo/index.html - template
- demo/preview.jpg
- demo/PROMPT.md - reference
- demo/source.json - data

## Questions

### Is Container Lines safe to install?

AIR scanned this exact version of Container Lines and flagged nothing. AIR's verdict: safe. The verdict is named by the content that was read, at commit 272528fec86a, so it cannot drift onto a version nobody scanned. The full report is at https://airmarket.ai/security/container-lines.

### How do I install Container Lines?

Open https://airmarket.ai/app/container-lines on Air Market and use the install action: Air Market hands Claude a prompt naming this exact skill, and Claude sets it up. Source, pinned to the exact commit this listing describes: https://github.com/MengTo/Skills/tree/272528fec86a4c2a1678646511c474aa734d437e/agent-skills/web-design/container-lines. Install from that link, not the branch.

## Related on Air Market

- [More Design listings](/category/design)
- [Everything by Meng To](/@mengto)

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Canonical URL: <https://airmarket.ai/app/container-lines>