nora/SESSION_NOTES.md

NORA Development Session Notes

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2026-01-26 - Dashboard Expansion

Iteration 1: Planning & Exploration

• Received detailed implementation plan for dashboard expansion
• Explored codebase structure using Task agent
• Identified key files to modify:
  • main.rs - AppState
  • ui/api.rs, ui/mod.rs, ui/components.rs, ui/templates.rs
  • registry/docker.rs, npm.rs, maven.rs, cargo_registry.rs

Iteration 2: Infrastructure (Phase 1)

• Created src/dashboard_metrics.rs:

  • DashboardMetrics struct with AtomicU64 counters
  • Per-registry tracking (docker, npm, maven, cargo, pypi)
  • record_download(), record_upload(), record_cache_hit/miss()
  • cache_hit_rate() calculation

• Created src/activity_log.rs:

  • ActionType enum: Pull, Push, CacheHit, ProxyFetch
  • ActivityEntry struct with timestamp, action, artifact, registry, source
  • ActivityLog with RwLock (bounded to 50 entries)

Iteration 3: AppState Update (Phase 2)

• Updated main.rs:
  • Added mod activity_log and mod dashboard_metrics
  • Extended AppState with metrics: DashboardMetrics and activity: ActivityLog
  • Initialized in run_server()

Iteration 4: API Endpoint (Phase 3)

• Updated ui/api.rs:

  • Added structs: DashboardResponse, GlobalStats, RegistryCardStats, MountPoint
  • Implemented api_dashboard() - aggregates all metrics, storage stats, activity

• Updated ui/mod.rs:

  • Added route /api/ui/dashboard
  • Modified dashboard() handler to use new response

Iteration 5: Dark Theme UI (Phase 4)

• Updated ui/components.rs with ~400 new lines:
  • layout_dark() - dark theme wrapper (#0f172a background)
  • sidebar_dark(), header_dark() - dark theme navigation
  • render_global_stats() - 5-column stats grid
  • render_registry_card() - extended card with metrics
  • render_mount_points_table() - registry paths and proxies
  • render_activity_row(), render_activity_log() - activity display
  • render_polling_script() - 5-second auto-refresh JS

Iteration 6: Dashboard Template (Phase 5)

• Updated ui/templates.rs:
  • Refactored render_dashboard() to accept DashboardResponse
  • Added uptime display, global stats, registry cards grid
  • Added mount points table and activity log
  • Added format_relative_time() helper

Iteration 7: Registry Instrumentation (Phase 6)

• registry/docker.rs:

  • download_blob() - record download + cache hit + activity
  • get_manifest() - record download + cache hit + activity
  • upload_blob() - record upload + activity
  • put_manifest() - record upload + activity

• registry/npm.rs:

  • Cache hit tracking for local storage
  • Cache miss + proxy fetch tracking

• registry/maven.rs:

  • download() - cache hit/miss + activity
  • upload() - record upload + activity

• registry/cargo_registry.rs:

  • download() - record download + activity

Iteration 8: Build & Test

• cargo build - compiled successfully with minor warnings
• Fixed warnings:
  • Removed unused RegistryStats import
  • Added #[allow(dead_code)] to stat_card()
• cargo test - all 75 tests passed

Iteration 9: Server Testing

• Started server: cargo run --release --bin nora
• Tested endpoints:

  GET /health - OK
  GET /api/ui/dashboard - returns full metrics JSON
  GET /ui/ - dark theme dashboard HTML
  GET /v2/test/manifests/v1 - triggered Docker metrics
  GET /npm/lodash/-/lodash-4.17.21.tgz - triggered npm proxy metrics
  

• Verified metrics tracking:
  • Downloads: 3 (2 Docker + 1 npm)
  • Cache hit rate: 66.67%
  • Activity log populated with Pull, ProxyFetch events

Iteration 10: Git Commit & Push

• Staged 11 files (2 new, 9 modified)
• Commit: 93f9655 Add dashboard metrics, activity log, and dark theme
• Pushed to origin/main

Iteration 11: Documentation

• Updated TODO.md with v0.2.1 section
• Created this SESSION_NOTES.md

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Key Decisions Made

1. In-memory metrics - AtomicU64 for thread-safety, reset on restart
2. Bounded activity log - 50 entries max, oldest evicted
3. Polling over WebSocket - simpler, 5-second interval sufficient
4. Dark theme only for dashboard - registry list pages keep light theme

Files Changed Summary

New:
  nora-registry/src/activity_log.rs
  nora-registry/src/dashboard_metrics.rs

Modified:
  nora-registry/src/main.rs                    (+8 lines)
  nora-registry/src/registry/cargo_registry.rs (+13 lines)
  nora-registry/src/registry/docker.rs         (+47 lines)
  nora-registry/src/registry/maven.rs          (+36 lines)
  nora-registry/src/registry/npm.rs            (+29 lines)
  nora-registry/src/ui/api.rs                  (+154 lines)
  nora-registry/src/ui/components.rs           (+394 lines)
  nora-registry/src/ui/mod.rs                  (+5 lines)
  nora-registry/src/ui/templates.rs            (+180/-79 lines)

Total: ~1004 insertions, 79 deletions

Useful Commands

# Start server
cargo run --release --bin nora

# Test dashboard
curl http://127.0.0.1:4000/api/ui/dashboard

# View UI
open http://127.0.0.1:4000/ui/

# Trigger metrics
curl http://127.0.0.1:4000/v2/test/manifests/v1
curl http://127.0.0.1:4000/npm/lodash/-/lodash-4.17.21.tgz -o /dev/null

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