Tag-based cross-cutting view pages for plan site

Acceptance Criteria

• "By tag" view pages are generated when 3+ distinct tags exist
• "By assignee" view pages are generated when 2+ distinct assignees exist
• "By milestone" view pages are generated when 2+ milestones exist
• Each view page uses {% backlog %} with the appropriate filter
• A "Views" section appears in the sidebar with links to generated pages
• View pages are generated during the aggregate pipeline phase (no manual authoring)
• Count badges show how many entities match each grouping value

Approach

During the aggregate phase, scan the entity registry for distinct tag/assignee/milestone values. For each value above the threshold, generate a synthetic page containing a {% backlog %} rune with the appropriate filter. Add these pages to the page index and sidebar nav.

References

• Plan Site UX at Scale (Plan Site UX at Scale — Feature 4)
• Build backlog Rune (backlog rune — provides the filtering display)