Component Creation - Changelog Component

Execution Plan

Create a comprehensive Changelog React component with:

• GitHub-style heatmap visualization (month/quarter/year granularity)
• Separate heatmap rows for content vs development categories
• Shared date overlay (year/quarter headers) above heatmap rows
• Legend section positioned to the right of heatmap rows
• Modular component architecture for maintainability
• Quarter-based list view with filtering
• Responsive design and proper alignment

Execution Results / Attempts

✅ Initial Changelog Component Created (2025-01-20)

Work Period: January 20, 2025

Key Accomplishments:

• Created initial Changelog component with heatmap visualization
• Implemented month/quarter/year grouping and display
• Added quarter-based list view with horizontal scrolling
• Integrated with changelog data generation system

✅ Component Modularization & Refinement (2025-01-20)

Work Period: January 20, 2025 (Iterative refinement)

Key Accomplishments:

Component Architecture

• Modularized Changelog component into sub-components:
  • DateOverlay/ - Shared year and quarter headers above heatmap rows
  • HeatmapRow/ - Individual heatmap row for each category (content/development)
  • LegendSidebar/ - Title and legend for each heatmap row
  • Legend/ - Intensity scale legend component
  • Filters/ - Filter dropdowns (status, type, priority, category)
  • QuarterSection/ - Quarterly entries display with filtering

Layout & Alignment

• Separated heatmap rows from legends:
  • Heatmap rows on left side (flex: 1)
  • Legends section on right side (fixed 200px width)
  • DateOverlay positioned above rows, spanning only rows width
  • Legend section header ("Legend") aligned with DateOverlay

Heatmap Visualization

• Two separate heatmap rows:
  • Content row (blue color scheme)
  • Development row (green color scheme)
  • Each row has its own title and legend on the right
  • Shared date overlay (year/quarter headers) above both rows

Spacing & Alignment

• Quarter gaps:

  • Added 4px gap divs between quarters (matching heatmap squares)
  • CSS gap (2px) applies to gap divs, creating 8px total visual gap
  • Updated width calculations to account for quarter gaps (8px total)
  • Quarter bars align perfectly with heatmap squares below

• Row spacing:

  • Minimal 2px gap between heatmap rows (matching square spacing)
  • Minimal 2px gap between legend entries
  • Removed excessive padding/margins

Alignment Fixes

• Fixed quarter bar alignment with heatmap squares:

  • Accounted for CSS gap (2px) in width calculations
  • Quarter gap divs (4px) + CSS gap (2px on each side) = 8px total
  • Year and quarter lines span correct widths
  • Quarter lines don't extend beyond their containers (overflow: hidden)

• Fixed legend alignment:

  • Legends anchored to top-right (not bottom)
  • Added "Legend" header aligned with DateOverlay
  • Proper flex alignment (align-content: flex-start, justify-content: flex-start)

Date Overlay

• Year labels and lines span full year width (including quarter gaps)
• Quarter labels and lines span individual quarter widths
• Proper positioning above heatmap rows
• Gap divs match heatmap row structure exactly
• Year labels use Highlight component with gradient background
• Year line positioned behind year label (z-index: 0)

Additional Enhancements

• Dynamic Date Range: Always shows 1 year ago, this year, and next year (dynamically calculated)
• Current Month Indicator: Added to legend with bordered square and month/year label
• Year Highlighting: Year labels use Highlight component for visual emphasis
• Legend Header: "Legend" header anchored to top-right with minimal vertical space

Components Created:

• src/components/Changelog/Changelog.tsx - Main component orchestrating all sub-components
• src/components/Changelog/DateOverlay/DateOverlay.tsx - Year and quarter headers
• src/components/Changelog/HeatmapRow/HeatmapRow.tsx - Individual heatmap row
• src/components/Changelog/LegendSidebar/LegendSidebar.tsx - Title and legend wrapper
• src/components/Changelog/Legend/Legend.tsx - Intensity scale legend
• src/components/Changelog/Filters/ChangelogFilters.tsx - Filter dropdowns
• src/components/Changelog/QuarterSection/QuarterSection.tsx - Quarterly entries display

CSS Modules Created:

• Each component has its own .module.css file for scoped styling
• Proper alignment and spacing rules
• Responsive design considerations

Key Technical Details:

• Width calculations account for:
  • Month cells: 20px each
  • Month gaps: 2px between months (CSS gap)
  • Quarter gaps: 4px gap div + 2px CSS gap on each side = 8px total
  • Year width = sum of quarter widths + (quarters.length - 1) × 8px
• Date range: Dynamically shows 1 year ago, this year, and next year
• Year labels use Highlight component with gradient background
• Year line z-index: 0 (behind label), label z-index: 3 (above line)
• Legend includes current month indicator with bordered square and month/year label

Storybook Stories:

• Changelog.stories.tsx: Default, SingleEntry, ManyEntries, ContentOnly, DevelopmentOnly stories
• Changelog.mdx: Comprehensive documentation of component structure, layout, and behavior
• Stories include sample entries with proper category assignments (content/development)

Related Links:

• Changelog Component
• Changelog Stories
• Changelog Documentation
• Changelog Page
• Changelog System Entry

✅ Mobile Responsiveness & UX Improvements (2025-01-20)

Work Period: January 20, 2025 (Iterative refinement)

Key Accomplishments:

Mobile Card Design

• Minimal, horizontally wide rectangular cards:
  • Reduced card padding from 1.5rem to 0.75rem 1rem (horizontal emphasis)
  • Reduced border radius from 8px to 6px for tighter appearance
  • Reduced gap between cards from 1rem to 0.75rem
  • Disabled hover transform on mobile (no translateY)

Typography Optimization

• Smaller font sizes on mobile:
  • Title: 1.25rem → 1rem
  • Description: 0.875rem with 2-line clamp and ellipsis
  • Meta: 0.875rem → 0.75rem
  • Status titles: 1rem → 0.875rem
  • Quarter titles: 1.25rem → 1.1rem

Badge Improvements

• Compact badges:
  • Padding: 0.25rem 0.75rem → 0.15rem 0.5rem
  • Font size: 0.75rem → 0.65rem
  • Border radius: 12px → 8px
  • Tighter gap: 0.5rem → 0.25rem

Layout Enhancements

• Description truncation: Limited to 2 lines with ellipsis on mobile
• Meta information: Horizontal layout (flex-direction: row) instead of vertical
• Meta items: Inline with white-space: nowrap for compact display
• Quarter section: Reduced padding from 1.5rem to 1rem on mobile
• Quarter headers: Reduced margins and thinner borders

Mobile Heatmap & Legend Layout

• Vertical stacking on mobile:
  • Legend section moves above heatmap rows (order: -1)
  • Legend takes full width and left-aligns
  • Date overlay and heatmap rows scroll together (no independent scrolling)
  • Filters stack vertically with full-width dropdowns

Filter Improvements

• Mobile-friendly filters:
  • Stack vertically on mobile (flex-direction: column)
  • Full-width dropdowns with proper box-sizing
  • Smaller font sizes (0.8rem for labels, 0.875rem for selects)
  • Proper text wrapping and overflow handling
  • Removed appearance defaults for better mobile compatibility

CSS Files Modified:

• QuarterSection.module.css - Mobile card styles, typography, badges, meta layout
• Changelog.module.css - Mobile heatmap/legend layout, filter styles
• LegendSidebar.module.css - Mobile legend alignment
• Legend.module.css - Mobile legend alignment

✅ EntryTimeline Component Creation (2025-01-20)

Work Period: January 20, 2025

Key Accomplishments:

Timeline Visualization

• Created EntryTimeline component to replace text-based date display with a proper timeline visualization:
  • Timeline bar: Horizontal line spanning full width (2px height, gray background)
  • Inception dot: Primary color dot positioned at left (0%) on the bar
  • Execution dot: Success color dot positioned at right (100%) on the bar (only shown if execution date exists)
  • Duration label: Centered on the bar, showing time between inception and execution
  • Date labels: Displayed below the bar, aligned with their respective dots

Visual Layout Structure

[●─────────────────── 5 days ───────────────────●]
Inception                                    Execution
Jan 15, 2025                            Jan 20, 2025

Layout Components:

1. Timeline Bar (.timelineBar):

   • Horizontal line (2px height) spanning full width
   • Gray background (var(--ifm-color-emphasis-300))
   • Position: relative container for absolutely positioned dots

2. Timeline Dots (.timelineDotContainer):

   • Inception dot: Absolutely positioned at left: 0 (start of bar)
     • Primary color (var(--ifm-color-primary))
     • 10px diameter (8px on mobile)
     • 2px border (1.5px on mobile)
   • Execution dot: Absolutely positioned at right: 0 (end of bar)
     • Success color (var(--ifm-color-success)) when execution date exists
     • Muted gray color (var(--ifm-color-emphasis-400)) with reduced opacity when execution is TBD
     • Same size as inception dot
     • Always rendered - shows even when execution date is "TBD" or "XX"

3. Duration Label (.timelineDuration):

   • Centered on the bar (left: 50%, transform: translate(-50%, -50%))
   • Background matches page background (appears above bar)
   • Shows calculated duration or "X days thus far" for TBD execution
   • Font: 0.7rem (0.65rem on mobile), font-weight: 600

4. Date Labels (.timelineDates):

   • Row below the bar, flex layout with space-between
   • Inception date: Left-aligned under inception dot
   • Execution date: Right-aligned under execution dot (always shown)
   • Each date item contains:
     • Label: "INCEPTION" or "EXECUTION" (uppercase, 0.65rem, 0.6rem on mobile)
     • Date: Formatted date string (0.75rem, 0.7rem on mobile) or "TBD" if execution date is TBD

Duration Calculation

• Smart duration formatting:
  • TBD execution: Shows "X days thus far" (calculated from inception to today)
  • Completed execution: Shows duration between inception and execution dates
  • Duration formats:
    • "Same day" if 0 days
    • "X days" if < 7 days
    • "X weeks" if < 30 days
    • "X months" if < 365 days
    • "X years, Y months" if >= 1 year
  • Handles invalid dates gracefully (returns "TBD")
• Visual indication for TBD execution:
  • Execution dot always visible (even when TBD)
  • TBD execution dot uses muted gray color with reduced opacity (.timelineDotTBD)
  • Execution date label shows "TBD" instead of formatted date
  • Duration shows "X days thus far" to indicate ongoing work

Date Formatting

• Smart date formatting:
  • Handles "TBD" and "XX" dates gracefully (replaces "XX" with "??")
  • Formats dates as "Jan 15, 2025" (month short, day numeric, year numeric)
  • Falls back to original string if date parsing fails

Responsive Design

• Mobile optimization:
  • Thinner bar: 2px → 1.5px height on mobile
  • Smaller dots: 10px → 8px diameter on mobile
  • Thinner borders: 2px → 1.5px on mobile
  • Smaller duration label: 0.7rem → 0.65rem on mobile
  • Smaller date fonts: 0.75rem → 0.7rem for dates, 0.65rem → 0.6rem for labels
  • Tighter spacing: 0.5rem → 0.375rem gap
  • Reduced padding on duration label: 0.125rem 0.375rem → 0.1rem 0.25rem

Integration

• Replaced text-based dates in QuarterSection:
  • Removed separate "Inception:" and "Execution:" text spans
  • Integrated EntryTimeline component into entryMeta section
  • Timeline aligns properly with other meta items (component name, etc.)
  • Works seamlessly with horizontal meta layout on mobile

Components Created:

• src/components/Changelog/EntryTimeline/EntryTimeline.tsx - Timeline component with duration calculation
• src/components/Changelog/EntryTimeline/EntryTimeline.module.css - Timeline styles with bar, dots, and date layout
• src/components/Changelog/EntryTimeline/index.tsx - Export file

CSS Classes:

• .timeline - Main container (flex column)
• .timelineBar - Horizontal bar/line (relative positioning)
• .timelineDotContainer - Container for dots (absolute positioning)
• .timelineDot - Dot styling (circular, colored)
• .timelineDotInception - Primary color for inception dot
• .timelineDotExecution - Success color for execution dot (when execution date exists)
• .timelineDotTBD - Muted gray color for execution dot when execution is TBD
• .timelineDuration - Duration label (centered on bar)
• .durationLabel - Duration text styling
• .timelineDates - Date labels row (flex, space-between)
• .timelineDateItem - Individual date item container
• .timelineLabel - "INCEPTION" / "EXECUTION" label styling
• .timelineDate - Formatted date text styling

CSS Integration:

• Added timeline styles integration in QuarterSection.module.css
• Timeline works seamlessly with horizontal meta layout on mobile

✅ Docusaurus Routing Configuration (2025-01-20)

Work Period: January 20, 2025

Key Accomplishments:

Plugin Configuration

• Added @docusaurus/plugin-content-docs plugin to serve changelog markdown files as pages:
  • Plugin ID: changelog (unique identifier for multi-instance plugin, similar to blog plugin's id: 'designs')
  • Path: ./changelog (points to changelog directory, no file copying required)
  • Route Base Path: changelog (files accessible at /changelog/...)
  • Sidebar Configuration: sidebarPath: false (no sidebar needed for changelog entries)
  • Edit URL: Points to GitHub for easy editing
  • Uses built-in Docusaurus plugin: Follows same pattern as @docusaurus/plugin-content-blog for multiple instances

Why Docs Plugin Instead of Pages Plugin

• Pages plugin limitation: @docusaurus/plugin-content-pages doesn't support multiple instances (unlike blog/docs plugins)
• Docs plugin advantage: @docusaurus/plugin-content-docs supports multiple instances with id field, just like blog plugin
• No file copying required: Files served directly from changelog/ directory (like blog serves from designs/)
• Proper MDX rendering: Full markdown content rendered with Docusaurus MDX features and frontmatter support

Link Generation Fix

• Fixed broken changelog entry links:
  • Previously linked to GitHub (temporary workaround)
  • Now links to /changelog/${slug} (proper Docusaurus routes)
  • Preserves subdirectory structure in URLs (e.g., /changelog/development/2025-01-15-...)
  • Links work correctly for both content and development entries

Benefits

• Changelog entries are now accessible as pages:
  • Full markdown content rendered with Docusaurus MDX features
  • Frontmatter properly parsed and displayed
  • Edit links point to GitHub for easy updates
  • Proper routing and navigation within Docusaurus site
  • SEO-friendly URLs
  • No file copying or custom plugins required
  • Uses standard Docusaurus plugin pattern (same as blog plugin)

Configuration Files Modified:

• docusaurus.config.js: Added changelog docs plugin configuration (follows blog plugin pattern)
• src/pages/changelog.tsx: Updated getEntryUrl to use proper routes

Example URLs:

• /changelog/development/2025-01-15-component-creation-svg-kanban
• /changelog/content/2025-XX-XX-content-post-knowledge-agents-design

Configuration Pattern:

[
  '@docusaurus/plugin-content-docs',
  {
    id: 'changelog',  // Multi-instance support (like blog plugin)
    path: './changelog',
    routeBasePath: 'changelog',
    sidebarPath: false,
    editUrl: 'https://github.com/.../changelog/',
  },
]

Status: Changelog component has been successfully created and refined with modular architecture, proper alignment, GitHub-style heatmap visualization, dynamic date range, year highlighting, current month indicator, mobile responsiveness, timeline visualization, and proper Docusaurus routing. The component is production-ready and maintains clean separation of concerns. Storybook stories and documentation are complete. All changelog entries are now accessible as pages with proper routing.