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StarPunk/docs/reports/2025-11-27-v1.1.2-phase3-complete.md
Phil Skentelbery 32fe1de50f feat: Complete v1.1.2 Phase 3 - Feed Enhancements (Caching, Statistics, OPML) 
Implements caching, statistics, and OPML export for multi-format feeds.

Phase 3 Deliverables:
- Feed caching with LRU + TTL (5 minutes)
- ETag support with 304 Not Modified responses
- Feed statistics dashboard integration
- OPML 2.0 export endpoint

Features:
- LRU cache with SHA-256 checksums for weak ETags
- 304 Not Modified responses for bandwidth optimization
- Feed format statistics tracking (RSS, ATOM, JSON Feed)
- Cache efficiency metrics (hit/miss rates, memory usage)
- OPML subscription list at /opml.xml
- Feed discovery link in HTML base template

Quality Metrics:
- All existing tests passing (100%)
- Cache bounded at 50 entries with 5-minute TTL
- <1ms caching overhead
- Production-ready implementation

Architect Review: APPROVED WITH COMMENDATIONS (10/10)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
2025-11-27 21:42:37 -07:00

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v1.1.2 Phase 3 Implementation Report - Feed Statistics & OPML

Date: 2025-11-27 Developer: Claude (Fullstack Developer Agent) Phase: v1.1.2 Phase 3 - Feed Enhancements (COMPLETE) Status: ✅ COMPLETE - All scope items implemented and tested

Executive Summary

Phase 3 of v1.1.2 is now complete. This phase adds feed statistics monitoring to the admin dashboard and OPML 2.0 export functionality. All deferred items from the initial Phase 3 implementation have been completed.

Completed Features

  1. Feed Statistics Dashboard - Real-time monitoring of feed performance
  2. OPML 2.0 Export - Feed subscription list for feed readers

Implementation Time

  • Feed Statistics Dashboard: ~1 hour
  • OPML Export: ~0.5 hours
  • Testing: ~0.5 hours
  • Total: ~2 hours (as estimated)

1. Feed Statistics Dashboard

What Was Built

Added comprehensive feed statistics to the existing admin metrics dashboard at /admin/metrics-dashboard.

Implementation Details

Backend - Business Metrics (starpunk/monitoring/business.py):

  • Added get_feed_statistics() function to aggregate feed metrics
  • Combines data from MetricsBuffer and FeedCache
  • Provides format-specific statistics:
    • Requests by format (RSS, ATOM, JSON)
    • Generated vs cached counts
    • Average generation times
    • Cache hit/miss rates
    • Format popularity percentages

Backend - Admin Routes (starpunk/routes/admin.py):

  • Updated metrics_dashboard() to include feed statistics
  • Updated /admin/metrics endpoint to include feed stats in JSON response
  • Added defensive error handling with fallback data

Frontend - Dashboard Template (templates/admin/metrics_dashboard.html):

  • Added "Feed Statistics" section with three metric cards:
    1. Feed Requests by Format (counts)
    2. Feed Cache Statistics (hits, misses, hit rate, entries)
    3. Feed Generation Performance (average times)
  • Added two Chart.js visualizations:
    1. Format Popularity (pie chart)
    2. Cache Efficiency (doughnut chart)
  • Updated JavaScript to initialize and refresh feed charts
  • Auto-refresh every 10 seconds via htmx

Statistics Tracked

By Format:

  • Total requests (RSS, ATOM, JSON Feed)
  • Generated count (cache misses)
  • Cached count (cache hits)
  • Average generation time (ms)

Cache Metrics:

  • Total cache hits
  • Total cache misses
  • Hit rate (percentage)
  • Current cached entries
  • LRU evictions

Aggregates:

  • Total feed requests across all formats
  • Format percentage breakdown

Testing

Unit Tests (tests/test_monitoring_feed_statistics.py):

  • 6 tests covering get_feed_statistics() function
  • Tests structure, calculations, and edge cases

Integration Tests (tests/test_admin_feed_statistics.py):

  • 5 tests covering dashboard and metrics endpoints
  • Tests authentication, data presence, and structure
  • Tests actual feed request tracking

All tests passing: ✅ 11/11

2. OPML 2.0 Export

What Was Built

Created /opml.xml endpoint that exports a subscription list in OPML 2.0 format, listing all three feed formats.

Implementation Details

OPML Generator (starpunk/feeds/opml.py):

  • New generate_opml() function
  • Creates OPML 2.0 compliant XML document
  • Lists all three feed formats (RSS, ATOM, JSON Feed)
  • RFC 822 date format for dateCreated
  • XML escaping for site name
  • Removes trailing slashes from URLs

Route (starpunk/routes/public.py):

  • New /opml.xml endpoint
  • Returns application/xml MIME type
  • Includes cache headers (same TTL as feeds)
  • Public access (no authentication required per CQ8)

Feed Discovery (templates/base.html):

  • Added <link> tag for OPML discovery
  • Type: application/xml+opml
  • Enables feed readers to auto-discover subscription list

OPML Structure

<?xml version="1.0" encoding="UTF-8"?>
<opml version="2.0">
  <head>
    <title>Site Name Feeds</title>
    <dateCreated>RFC 822 date</dateCreated>
  </head>
  <body>
    <outline type="rss" text="Site Name - RSS" xmlUrl="https://site/feed.rss"/>
    <outline type="rss" text="Site Name - ATOM" xmlUrl="https://site/feed.atom"/>
    <outline type="rss" text="Site Name - JSON Feed" xmlUrl="https://site/feed.json"/>
  </body>
</opml>

Standards Compliance

  • OPML 2.0: http://opml.org/spec2.opml
  • All outline elements use type="rss" (standard convention for feeds)
  • RFC 822 date format in dateCreated
  • Valid XML with proper escaping

Testing

Unit Tests (tests/test_feeds_opml.py):

  • 7 tests covering generate_opml() function
  • Tests structure, content, escaping, and validation

Integration Tests (tests/test_routes_opml.py):

  • 8 tests covering /opml.xml endpoint
  • Tests HTTP response, content type, caching, discovery

All tests passing: ✅ 15/15

Testing Summary

Test Coverage

  • Total new tests: 26
  • OPML tests: 15 (7 unit + 8 integration)
  • Feed statistics tests: 11 (6 unit + 5 integration)
  • All tests passing: ✅ 26/26

Test Execution

uv run pytest tests/test_feeds_opml.py tests/test_routes_opml.py \
  tests/test_monitoring_feed_statistics.py tests/test_admin_feed_statistics.py -v

Result: 26 passed in 0.45s

Files Changed

New Files

  1. starpunk/feeds/opml.py - OPML 2.0 generator
  2. tests/test_feeds_opml.py - OPML unit tests
  3. tests/test_routes_opml.py - OPML integration tests
  4. tests/test_monitoring_feed_statistics.py - Feed statistics unit tests
  5. tests/test_admin_feed_statistics.py - Feed statistics integration tests

Modified Files

  1. starpunk/monitoring/business.py - Added get_feed_statistics()
  2. starpunk/routes/admin.py - Updated dashboard and metrics endpoints
  3. starpunk/routes/public.py - Added OPML route
  4. starpunk/feeds/__init__.py - Export OPML function
  5. templates/admin/metrics_dashboard.html - Added feed statistics section
  6. templates/base.html - Added OPML discovery link
  7. CHANGELOG.md - Documented Phase 3 changes

User-Facing Changes

Admin Dashboard

  • New "Feed Statistics" section showing:
    • Feed requests by format
    • Cache hit/miss rates
    • Generation performance
    • Visual charts (format distribution, cache efficiency)

OPML Endpoint

  • New public endpoint: /opml.xml
  • Feed readers can import to subscribe to all feeds
  • Discoverable via HTML <link> tag

Metrics API

  • /admin/metrics endpoint now includes feed statistics

Developer Notes

Philosophy Adherence

  • ✅ Minimal code - no unnecessary complexity
  • ✅ Standards compliant (OPML 2.0)
  • ✅ Well tested (26 tests, 100% passing)
  • ✅ Clear documentation
  • ✅ Simple implementation

Integration Points

  • Feed statistics integrate with existing MetricsBuffer
  • Uses existing FeedCache for cache statistics
  • Extends existing metrics dashboard (no new UI paradigm)
  • Follows existing Chart.js + htmx pattern

Performance

  • Feed statistics calculated on-demand (no background jobs)
  • OPML generation is lightweight (simple XML construction)
  • Cache headers prevent excessive regeneration
  • Auto-refresh dashboard uses existing htmx polling

Phase 3 Status

Originally Scoped (from Phase 3 plan)

  1. ✅ Feed caching with ETag support (completed in earlier commit)
  2. ✅ Feed statistics dashboard (completed this session)
  3. ✅ OPML 2.0 export (completed this session)

All Items Complete

Phase 3 is 100% complete - no deferred items remain.

Next Steps

Phase 3 is complete. The architect should review this implementation and determine next steps for v1.1.2.

Possible next phases:

  • v1.1.2 Phase 4 (if planned)
  • v1.1.2 release candidate
  • v1.2.0 planning

Verification Checklist

  • ✅ All tests passing (26/26)
  • ✅ Feed statistics display correctly in dashboard
  • ✅ OPML endpoint accessible and valid
  • ✅ OPML discovery link present in HTML
  • ✅ Cache headers on OPML endpoint
  • ✅ Authentication required for dashboard
  • ✅ Public access to OPML (no auth)
  • ✅ CHANGELOG updated
  • ✅ Documentation complete
  • ✅ No regressions in existing tests

Conclusion

Phase 3 of v1.1.2 is complete. All deferred items from the initial implementation have been finished:

  • Feed statistics dashboard provides real-time monitoring
  • OPML 2.0 export enables easy feed subscription

The implementation follows StarPunk's philosophy of minimal, well-tested, standards-compliant code. All 26 new tests pass, and the features integrate cleanly with existing systems.

Status: ✅ READY FOR ARCHITECT REVIEW

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