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Independent TypeScript/Node project with ESLint, Prettier, Vitest. Folder structure: src/ingestion, src/graph, src/analysis, src/server. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…efineGraphSchema) SongKey, GraphNode, ListeningGraph types in src/graph/types.ts. Raw ingestion types (RawScrobble, RawSpotifyRecentTrack, RawSpotifyPlaylistTrack) in src/ingestion/types.ts. Includes toSongKey() helper. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…1/02-DataStorage) Evaluated Neo4j, SQLite, PostgreSQL, TinyBase. Recommending SQLite for zero infrastructure, right-sized capacity, and deployment simplicity. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…MAuth) - Config loader reads LASTFM_API_KEY and LASTFM_USERNAME from .env - Fails fast with clear error messages if either is missing - LastfmClient class wraps authenticated API requests (key as query param) - verifyAuth() method calls user.getInfo to validate credentials - 8 tests covering config validation and client behavior Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…yOAuth) Add SpotifyAuth class with full OAuth2 Authorization Code flow for CLI/server-side usage. Includes local HTTP callback server, token persistence to disk, automatic refresh, and browser auto-open. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…ESM fixes
- Delete package-lock.json and add to .gitignore (project uses Yarn)
- Add vitest.config.ts scoped to src/**/*.test.ts to avoid running dist/
- Add Spotify env vars to .env.example
- Fix DEFAULT_TOKEN_PATH to use import.meta.url instead of process.cwd()
- Replace require("node:child_process") with top-level static import
- Fix pre-existing lint issues in touched files (unused import, let→const)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…pLastFM) Paginated fetcher for user.getRecentTracks with: - 200 tracks/page with 1 req/sec rate limiting - Resume support via checkpoint file (saves last timestamp) - Edge case handling: skips now-playing, deduplicates, skips missing fields - Progress logging callback - Output as sorted JSON matching RawScrobble type - 9 tests covering pagination, edge cases, resume, and dedup Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…tify) Add SpotifyClient class that fetches recently played tracks and all playlist track orderings from Spotify API. Includes pagination, 429 rate limit handling with Retry-After, and edge case handling for local files, podcast episodes, and empty playlists. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…ntAndFormat) - Fix no-explicit-any in lastfm-fetcher.test.ts (use ReturnType cast) - Fix unused _init param in spotify-client.test.ts - Run prettier on unformatted files - All lint, format, and tests now pass cleanly Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…1/04-BuildGraph) Core graph construction algorithm: - Normalizes tracks to SongKey (case-insensitive artist::track) - Last.fm: chronological scrobble pairs create weighted edges - Spotify recent: same approach, sorted by playedAt - Spotify playlists: consecutive tracks per playlist create edges - Cross-source merge: same SongKey sums edge weights, unions sources - Metadata: totalScrobbles, dateRange, exportTimestamp, usernames - Edge cases: skips invalid tracks, handles single-track sessions - 20 tests covering all acceptance criteria Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…ookUpExportToDatabase) GraphDatabase class using better-sqlite3 with: - nodes, edges, metadata tables (auto-created) - Upsert logic merging play counts, edge weights, and sources - Incremental update support (second save merges with existing) - WAL mode + transactions for large graph efficiency - Round-trip tested (6 tests, all passing) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Standalone API server serving graph data from SQLite via Hono: - GET /graph (full or paginated with limit/offset) - GET /graph/node/:songKey (single node with edges) - GET /graph/neighbors/:songKey (neighbor nodes with weights) - GET /graph/stats (node count, edge count, metadata) CORS enabled, input validation, 404/400 error responses. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…Guide) Rewrote README.md with: - Project overview, prerequisites, setup instructions - Step-by-step usage guide (auth, fetch, build, store, serve) - API server endpoints table (graph, node, neighbors, stats) - npm scripts reference - Full project structure with file descriptions - Architecture decisions summary (SQLite, SongKey, Hono) - Troubleshooting section (rate limits, token expiry, resume) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…s (phase2/01-BasicStats) computeStats() returns per-node stats (in/out degree, weighted degree), graph-level summary (total nodes/edges, source breakdown, avg/median degree), and configurable top-N rankings (most played, most connected, highest in/out degree). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Iterative PageRank on the directed listening graph: - Configurable damping factor (0.85), convergence threshold (0.0001), max iterations (100) - Weighted: outgoing edge weights normalized as transition probabilities - Dangling nodes redistribute rank evenly to all nodes - Handles disconnected components via teleportation - Mutates graph in place, setting pageRank on each GraphNode - getTopByPageRank() helper for sanity checking top-ranked songs - Added optional pageRank field to GraphNode type - 13 tests covering convergence, weights, dangling nodes, disconnected components Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…Detection) Louvain method for weighted community detection: - Optimizes modularity by iteratively moving nodes to best neighboring community - Treats edges as undirected (sum of next + previous weights) - Assigns contiguous clusterId (0, 1, 2...) to each GraphNode - Returns ClusterResult: count, per-cluster stats (size, top songs, inter-cluster edges), modularity - Added optional clusterId field to GraphNode type - 11 tests covering separation, merging, stats, edge counting, modularity Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…2-EnrichedExport) - enrichGraph() orchestrates all analysis (PageRank, clusters, stats) - exportEnrichedGraph() writes enriched graph + summary as JSON - DB schema adds page_rank/cluster_id columns, persisted through save/load - New GET /graph/analysis endpoint serves full analysis summary - Enriched schema documented for Phase 3 handoff Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
ASCII wireframes and design spec for the graph view page: - New /graph Astro page with React GraphView component - Left sidebar: search, filters (play count, edge weight, source), cluster legend - Main canvas: force-directed layout, nodes sized by plays, colored by cluster - Bottom panel: node details with PageRank, neighbors, metrics on click - Stats overlay panel - Cluster colors mapped to chart-1 through chart-5 CSS variables - Desktop-first, mobile degrades to list view Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…e3/01-PickVisualizationLibrary) WebGL-native rendering handles 50k+ nodes, @react-sigma v5 provides modern React 19 hooks API, and graphology ecosystem includes ForceAtlas2 layout, shortest-path algorithms, and community detection utilities needed by downstream tickets. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…endering) New /graph page with force-directed graph visualization: - SigmaContainer with WebGL rendering (Sigma.js + graphology) - ForceAtlas2 layout via Web Worker (auto-stops after 5s) - Nodes sized by play count (log scale), colored by cluster ID - Edges with weight-based thickness and opacity - Dark theme: #0B0B0B background, DM Mono labels - useGraphData hook fetches from API, falls back to mock data - Header with back navigation Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
… caching (phase3/02-GraphDataLayer) - graph-types.ts: frontend types mirroring graph-pipeline API - graph-api.ts: fetchGraph with in-memory cache, filterGraph (by source/plays/cluster), toGraphology transform with cluster colors and log-scale sizing - GraphContext.tsx: React context with loading/error states, filter support, refresh - Updated useGraphData.ts to use shared data layer, preserved mock fallback - Installed sigma, graphology, @react-sigma/core, @react-sigma/layout-forceatlas2 - Fixed vitest alias path - 19 new tests (27 total in site/) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…ghbor highlighting (phase3/03-InteractiveFeatures) - GraphEvents: Sigma event handling with nodeReducer/edgeReducer for neighbor highlighting (dims non-neighbors, hides unconnected edges) - NodeTooltip: hover shows song name, artist, play count, PageRank - EdgeTooltip: hover shows transition count between two songs - NodeDetailPanel: right sidebar with stats, cluster color, and clickable neighbor list (outgoing/incoming sorted by weight) - GraphNavigator: camera animation when clicking neighbors in detail panel - Deselect: click empty space or press Escape Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…ase3/03-ClusterView) - ClusterLegend component: shows clusters sorted by size with color dots, top songs preview, eye toggle to hide/show, and focus button to isolate - useClusterInfo hook: extracts cluster summaries (size, label by most common artist, top songs by play count) from graphology graph - Composed cluster-based nodeReducer/edgeReducer with existing hover/select highlighting in GraphEvents - Inter-cluster edges styled thinner and more transparent than intra-cluster edges in both toGraphology and mock data - Focus mode: isolates cluster, hides inter-cluster edges, dims other nodes - Toggle mode: completely hides nodes and connected edges for hidden clusters Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…ase3/04-SearchAndFilter) - SearchBar: autocomplete search by song/artist, arrow key navigation, selecting a result centers camera and selects the node - FilterPanel: source toggles, min plays slider, top PageRank percentile slider, min edge weight slider, active filter summary with reset - GraphFilters: applies filters via graphology hidden attribute on nodes and edges, composes with neighbor-highlight reducers via AND logic - Filter toggle button in top-left, search bar in top-right Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Ticket: phase7-bugfixes/02-FixSidebarNavigationHighlighting\n\nStaged files:\n- site/src/components/GraphView.tsx\n- tickets/TICKETS.md\n\nGraphNavigator now emits Sigma's clickNode event after camera animation so sidebar/search navigation follows the same selection + reducer pipeline as direct canvas clicks. Mark ticket complete in TICKETS.md.
Prevents RangeError when newScrobbles exceeds V8's ~65k argument limit. Adds test with 70k mock scrobbles to verify no stack overflow. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replaces CWD-relative paths with import.meta.dirname-based resolution so fetch and build endpoints resolve to the same data/ directory regardless of working directory. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replaces edge-pair modularity with per-community formula Q = Σ_c [L_c/m − (d_c/(2m))²] to correctly account for non-adjacent same-community pairs. Removes unused sigmaIn array from Louvain. Updates tests with exact expected modularity values. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Reads existing source_plays from DB and merges per-source counts instead of replacing the entire JSON blob. Adds test verifying cross-source merge on successive saves. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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- 03-FixSearchEarlyExit: forEachNode return doesn't break iteration - 03-FixPathPanelLoadingGuard: cancelled fetch leaves loading stuck - 03-FixToGraphologySpreadOverflow: Math.max spread crashes on >65k nodes - 03-FixPlaylistNameCollision: same-name playlists merged incorrectly Also corrects 01-Triage-SearchNoEarlyExit disposition (was wrongly closed as invalid). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Adds graphDebug logging and sigma.refresh() calls to trace the reducer pipeline during sidebar/search navigation. Updates ticket with debugging log, evidence from browser logs, and next experiments. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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forEachNode callback return is a no-op — it doesn't break iteration. SearchBar and PathPanel now use for...of over graph.nodes() with break after 20 matches, avoiding full graph scans on every keystroke. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…ckout When a path fetch was cancelled mid-flight (algorithm or node change), the cleanup only set cancelled=true but never reset loading to false. The if(state.loading) guard then permanently blocked new fetches. Now the cleanup resets loading so the next effect run can proceed. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Math.max(...entries.map(...)) spreads the entire node array as function arguments, hitting RangeError on graphs with >65k nodes. Replaced with a simple loop. Added test verifying 70k nodes without crash. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
processSpotifyPlaylists grouped tracks by playlistName, merging distinct playlists with the same name into one edge group. Added playlistId field to RawSpotifyPlaylistTrack and keyed the grouping map by ID instead. Requires full re-ingest since old dumps lack the playlistId field. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Self-loop double weight, unused keyIndex param, depth-layer edge iteration optimization, and bootstrap reducer race condition. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
When i === j, both weights[i][j] and weights[j][i] write to the same cell, doubling the self-loop weight. Skip the reverse assignment for self-loops so weight is counted once, consistent with totalWeight. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…terStats keyIndex was passed but never referenced inside the function body. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…raph The post-BFS edge collection scanned every edge in the graph (O(E)) to find edges between neighborhood nodes. Now iterates only edges of nodes already in the depth neighborhood, avoiding the full-graph scan on each node click. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…light GraphEvents' reducer effect cleared all reducers when activeNode was null, but on initial mount the bootstrap selection from GraphInner hadn't propagated yet. Now skips clearing when externalSelectedKey is set, preventing a brief flash of un-highlighted graph on load. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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| return () => { | ||
| cancelled = true | ||
| onStateChange({ ...stateRef.current, loading: false }) | ||
| } |
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PathPanel cleanup effect resets loading state spuriously
Medium Severity
The useEffect cleanup function calls onStateChange({ ...stateRef.current, loading: false }) whenever the effect re-runs (due to from, to, or algorithm changing). This fires before the new effect body runs, potentially overwriting a freshly-set result captured in stateRef.current from a just-resolved promise. Since the cleanup uses the stale ref at teardown time and forcefully sets loading: false, it can race with the .then() callback and reset a valid result to loading: false with a stale or null result.
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| page_rank = COALESCE(excluded.page_rank, nodes.page_rank), | ||
| cluster_id = COALESCE(excluded.cluster_id, nodes.cluster_id), | ||
| image_url = COALESCE(excluded.image_url, nodes.image_url), | ||
| source_plays = COALESCE(excluded.source_plays, nodes.source_plays) |
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Database source_plays upsert silently overwrites instead of merging
Low Severity
The SQL upsert for source_plays uses COALESCE(excluded.source_plays, nodes.source_plays), which simply picks the new value over the old one. The additive merge logic only works because the TypeScript code above pre-merges with the existing DB row. But sources on line 91 uses the same pattern (excluded.sources) and relies on the same pre-merge. If a future caller bypasses the TypeScript merge (e.g., batch insert), source_plays from the new row would silently overwrite the old one, losing per-source counts, rather than merging additively like total_plays and weight do at the SQL level.
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PathPanel cleanup race condition and source_plays SQL merge issue. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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I'm pretty happy with this state of polish. merging so I can have smaller pr's now |
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Summary
Full listening graph feature built across 7 phases:
Phase 1 — Data Ingestion & Storage
Phase 2 — Analysis
Phase 3 — Visualization
Phase 4 — Polish
Phase 5 — Visual Refresh
Phase 6 — PR Review Triage
Phase 7 — Bug Fixes (from Triage)
Open issues (2 remaining)
05-FixPathPanelCleanupRace— cleanup effect races with just-resolved promise05-FixSourcePlaysSqlMerge— source_plays SQL upsert overwrites instead of merging additivelyArchitecture
graph-pipeline/): Node + Hono + SQLite — ingestion, graph construction, analysis, APIsite/): Astro + React + Sigma.js — interactive graph visualizationTest plan
pnpm run serve), runPOST /pipeline/fetch/lastfmthenPOST /pipeline/buildlocalhost:4321/graphwith a node auto-focusedplaylistIdfield)🤖 Generated with Claude Code