Portfolio dashboard: cross-repo star delta feed and timeline

[djdarcy]

Portfolio dashboard: cross-repo star delta feed and timeline

Parent: Cross-repo engagement radar epic
Milestone: v0.5.0

Goal

Add a visual interface showing cross-repo engagement changes over time -- the "what should I pay attention to?" view.

Design options

Option A: New tab on existing dashboard

• Adds a "Portfolio" tab alongside Overview, All History, Community Trends, Star History, Dev
• Reads from portfolio gist (same gist CDN pattern)
• Shares styling, chart libraries, layout

Option B: Separate standalone page

• docs/portfolio/index.html -- independent dashboard
• Can evolve without constraining the per-repo dashboard
• Links to/from the per-repo dashboard

Recommended: Option A for the initial version (lower friction, consistent UX), with the flexibility to extract to Option B if complexity warrants it.

Dashboard components

1. Star delta feed (primary)

   • Chronological feed: "Mar 21: +2 stars on NCSI-Resolver, +1 star on ghtraf"
   • Filterable by org, time range
   • Click-through to repo

2. Star delta timeline (chart)

   • X-axis: dates, Y-axis: cumulative stars (stacked area or grouped bar)
   • Or: per-repo sparklines showing delta trend

3. Engagement heatmap (stretch)

   • Grid of repos x dates, colored by activity level
   • Quick visual scan of "where is the action?"

4. Top movers (summary card)

   • Top 5 repos by star delta this week/month
   • Top 5 by issue delta

Data source

Reads from the portfolio gist created by the collector (#SUB1, #SUB2). The gist contains daily snapshots; the dashboard JS computes and renders deltas client-side.

Dependencies

• Portfolio storage schema (#SUB2) must be stable
• Existing dashboard architecture (Shared JS data layer — extract duplicated logic from workflow and dashboard #42 shared JS data layer) benefits this work

Analysis

See 2026-03-21__17-57-11__dev-workflow-process_cross-repo-analytics-extend-vs-separate.md