Ryan engagement project

.claude/settings.local.json

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+{
+  "permissions": {
+    "allow": [
+      "Bash(find:*)",
+      "Bash(git rev-parse:*)",
+      "Bash(test:*)",
+      "Bash(cat:*)",
+      "Bash(npm run build:*)",
+      "Bash(node test_math_verification.mjs:*)",
+      "Bash(node:*)"
+    ],
+    "deny": [],
+    "ask": []
+  }
+}

.gitignore

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 node_modules/
-.DS_Store
+dist/
+.DS_Store
+*.local
+.env*
+
+# Windows
+Thumbs.db
+desktop.ini
+
+# Build caches
+.cache/
+.vite/
+
+# Temporary files
+*.tmp
+*.swp
+*.swo
+*~
+
+# IDE
+.vscode/
+.idea/
+*.sublime-project
+*.sublime-workspace
+
+# Test coverage
+coverage/
+.nyc_output/

CHANGELOG.md

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+# Changelog
+
+All notable changes to the Philadelphia Crime Dashboard + Route Safety Diary project.
+
+## [Unreleased]
+
+### 2025-11-18 - Map & Network Layer Audit (Agent-M Session)
+
+#### Fixed
+- **Network Layer Visibility:** Improved road network visibility in Diary mode
+  - Darkened network color from `#94a3b8` (slate-400) to `#64748b` (slate-500) for better contrast with OSM basemap
+  - Increased opacity from 0.6 to 0.7
+  - Lowered minzoom from 11 to 10 (network now visible at typical route-viewing zoom levels)
+  - Increased line widths by 10-15% across all zoom levels and road classes
+  - Added diagnostic console logging to confirm network layer loads successfully
+  - Files modified: [src/map/network_layer.js](src/map/network_layer.js)
+
+#### Added
+- **Comprehensive Documentation (Design Phase - Implementation for Codex):**
+  - [logs/AGENTM_MAP_AND_NETWORK_AUDIT_20251118T040000.md](logs/AGENTM_MAP_AND_NETWORK_AUDIT_20251118T040000.md) - Network visibility audit with root cause analysis
+  - [docs/M3_MAP_STYLE_AND_LAYERS.md](docs/M3_MAP_STYLE_AND_LAYERS.md) - Light basemap strategy for Diary mode
+  - [docs/M3_ROUTE_BOUNDARY_INTEGRATION.md](docs/M3_ROUTE_BOUNDARY_INTEGRATION.md) - Police district and census tract integration design
+  - [docs/M3_ROUTING_NOTES.md](docs/M3_ROUTING_NOTES.md) - Routing architecture and safer-path requirements
+
+#### Documentation Highlights
+
+**Part A: Network Visibility (Audit Complete)**
+- Verified network data: 91,959 segments present and valid (Philadelphia bbox correct)
+- Identified root causes:
+  - OSM raster basemap too colorful/busy (blends with network layer)
+  - Network color too light (#94a3b8 gray on OSM white/gray roads)
+  - Minzoom 11 too high (routes viewed at zoom 11-13, network not always visible)
+  - No diagnostic logging (user couldn't confirm network loaded)
+- Applied surgical fixes (see Fixed section above)
+- Documented limitation: OSM basemap fundamentally incompatible with safety visualization (strategic solution: light vector basemap)
+
+**Part B: Light Basemap Design (Design Complete)**
+- Proposed MapTiler Light vector basemap for Diary mode (with free Positron fallback)
+- Designed configuration strategy: `VITE_MAPTILER_API_KEY` env variable + `MAP_STYLES` object in config.js
+- Specified 7-layer visual hierarchy: basemap → network → safety segments → districts → labels
+- Crime Explorer unchanged (keeps OSM raster basemap)
+- Color discipline: Reserve color for safety ratings only; basemap uses grays/whites
+- Layer insertion strategy: `beforeId: 'road_label'` to place Diary layers above basemap but below labels
+
+**Part C: District/Tract Integration Design (Design Complete)**
+- Inventoried boundary data: 21 police districts (364 KB), 408 census tracts (1.4 MB)
+- Designed spatial join algorithm using Turf.js `booleanIntersects()` with bbox pre-filter optimization
+- Proposed UI: "Geographic Context" section in Insights panel showing crossed districts/tracts
+- Enhanced route GeoJSON schema with `geography.districts` and `geography.tracts` properties
+- Distance calculation algorithm: Point sampling method to compute km traveled per district
+- Map overlay: Translucent blue polygons for districts, orange for tracts (user-toggleable)
+- Performance: 2-5ms per route with boundary caching
+
+**Part D: Routing Architecture (Documentation Complete)**
+- Documented current Dijkstra implementation in [scripts/graph_pathfinder.mjs](scripts/graph_pathfinder.mjs)
+- Listed 5 demo route scenarios:
+  1. Route A: 30th St Station → Clark Park (walk, 2-3.5 km)
+  2. Route B: 30th St Station → Rittenhouse Sq (walk, 2-3.5 km)
+  3. Route C: Penn Campus → 9th & Christian (bike, 3-4.5 km)
+  4. Route D: City Hall → 34th & Walnut (walk, 2-3.5 km)
+  5. Route E: Rittenhouse Sq → Passyunk & Tasker (bike, 2.5-3.8 km)
+- Explained safety-weighted cost function: `length_m * (1 + penalty * (6 - score) / 5)`
+- Outlined safer alternative routing requirements:
+  - Distance overhead constraint (e.g., max +20% vs. shortest route)
+  - Path diversity validation (min 30% different segments)
+  - Multiple alternatives (base, +10%, +20% overhead)
+- Proposed Yen's K-shortest paths algorithm for multi-alternative generation
+- Designed route comparison UI (tab selector, comparison table, tradeoff chart)
+
+#### Known Issues
+- **Loop Routes (Critical):** 4 out of 5 demo routes stuck in loops with 96-99% duplicate coordinates
+  - Root cause: Likely node snapping errors or disconnected graph components
+  - Workaround: Use only route_A for testing
+  - Fix required: Debug graph construction and node snapping in [scripts/graph_pathfinder.mjs](scripts/graph_pathfinder.mjs)
+
+#### Next Steps for Codex
+1. **Basemap Switch (Part B):** Implement light vector basemap for Diary mode
+   - Add `MAP_STYLES` to config.js, update initMap.js to accept `mode` parameter
+   - Obtain MapTiler API key, add to .env
+2. **District Integration (Part C):** Implement spatial join and UI
+   - Create boundary_utils.js with Turf.js intersection functions
+   - Update generate_demo_data.mjs to add `geography` property to routes
+   - Add "Geographic Context" section to Insights panel
+3. **Routing Fixes (Part D):** Debug and enhance pathfinding
+   - Fix loop bug in demo routes (validate graph connectivity)
+   - Implement distance overhead constraint and diversity validation
+   - Generate 3 alternatives per route (base, +10%, +20%)
+4. **Route Comparison UI (Part D):** Add tab selector and comparison table
+   - Allow user to switch between base and safer alternatives
+   - Show tradeoff metrics (distance, safety, duration)
+
+---
+
+## Template for Future Entries
+
+### YYYY-MM-DD - Brief Description
+
+#### Added
+- New features
+
+#### Changed
+- Updates to existing features
+
+#### Fixed
+- Bug fixes
+
+#### Removed
+- Deprecated features