Horizontal Rules

Overview

Horizontal rules with visual separator and hidden syntax markers.

Implementation

• Syntax: ---, ***, or ___ (minimum 3 characters)
• The code syntax is visually replaced by drawing a border below the line.
• All three marker types are supported.
• The border adapts to the active theme for consistent styling.

Acceptance Criteria

Basic Horizontal Rules

Feature: Horizontal rule formatting

  Scenario: Hyphen syntax
    When I type ---
    Then the markers are replaced with visual separator
    And the separator is displayed

  Scenario: Asterisk syntax
    When I type ***
    Then the markers are replaced with visual separator
    And the separator is displayed

  Scenario: Underscore syntax
    When I type ___
    Then the markers are replaced with visual separator
    And the separator is displayed

Edge Cases

Feature: Horizontal rule edge cases

  Scenario: Minimum length
    When I type ---
    Then the rule is displayed
    When I type --
    Then the rule is not displayed

  Scenario: Longer rules
    When I type --------
    Then the visual separator is displayed

Reveal Raw Markdown

Feature: Reveal horizontal rule

  Scenario: Reveal on select
    Given --- is in my file
    When I select the rule
    Then the raw markdown is shown
    When I deselect
    Then the visual separator is displayed again

Notes

• Core Markdown feature
• Three syntax variants supported
• Theme-aware styling

Examples

• --- → ──────── (visual separator, markers hidden)
• *** → ──────── (visual separator, markers hidden)
• ___ → ──────── (visual separator, markers hidden)