MosswartOverlord/CLAUDE.md

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

Dereth Tracker is a real-time telemetry service for game world tracking. It's a FastAPI-based WebSocket and HTTP API service that ingests player position/stats data via plugins and provides live map visualization through a web interface.

Key Components

Main Service (main.py)

• WebSocket endpoint /ws/position receives telemetry and inventory events
• Routes inventory events to inventory service via HTTP
• Handles real-time player tracking and map updates

Inventory Service (inventory-service/main.py)

• Separate FastAPI service for inventory management
• Processes inventory JSON into normalized PostgreSQL tables
• Provides search API with advanced filtering and sorting
• Uses comprehensive enum database for translating game IDs to readable names

Database Architecture

• Telemetry DB: TimescaleDB for time-series player tracking data
• Inventory DB: PostgreSQL with normalized schema for equipment data
  • items: Core item properties
  • item_combat_stats: Armor level, damage bonuses
  • item_enhancements: Material, item sets, tinkering
  • item_spells: Spell names and categories
  • item_raw_data: Original JSON for complex queries

Memories and Known Bugs

• Fixed: Material names now properly display (e.g., "Gold Celdon Girth" instead of "Unknown_Material_Gold Celdon Girth")
• Fixed: Slot column shows "-" instead of "Unknown" for items without slot data
• Fixed: All 208 items in Larsson's inventory now process successfully (was 186 with 22 SQL type errors)
• Added: Type column in inventory search using object_classes enum for accurate item type classification
• Note: ItemType data is inconsistent in JSON - using ObjectClass as primary source for Type column

Recent Fixes (September 2025)

Portal Coordinate Rounding Fix ✅ RESOLVED

• Problem: Portal insertion failed with duplicate key errors due to coordinate rounding mismatch
• Root Cause: Code used 2 decimal places (ROUND(ns::numeric, 2)) but database constraint used 1 decimal place
• Solution: Changed all portal coordinate checks to use 1 decimal place to match DB constraint
• Result: 98% reduction in duplicate key errors (from 600+/min to ~11/min)
• Location: main.py lines ~1989, 1996, 2025, 2047

Character Display Issues ✅ RESOLVED

• Problem: Some characters (e.g., "Crazed n Dazed") not appearing in frontend
• Root Cause: Database connection pool exhaustion from portal error spam
• Solution: Fixed portal errors to reduce database load
• Result: Characters now display correctly after portal fix

Docker Container Deployment

• Issue: Code changes require container rebuild with --no-cache flag
• Command: docker compose build --no-cache dereth-tracker
• Reason: Docker layer caching can prevent updated source code from being copied

Current Known Issues

Minor Portal Race Conditions

• Status: ~11 duplicate key errors per minute (down from 600+)
• Cause: Multiple players discovering same portal simultaneously
• Impact: Minimal - errors are caught and handled gracefully
• Handling: Try/catch in code logs as debug messages and updates portal timestamp
• Potential Fix: PostgreSQL ON CONFLICT DO UPDATE (upsert pattern) would eliminate completely

Database Initialization Warnings

• TimescaleDB Hypertable: telemetry_events fails to become hypertable due to primary key constraint
• Impact: None - table works as regular PostgreSQL table
• Warning: "cannot create a unique index without the column 'timestamp'"

Connection Pool Under Load

• Issue: Database queries can timeout when connection pool is exhausted
• Symptom: Characters may not appear during high error load
• Mitigation: Portal error fix significantly reduced this issue

Equipment Suit Builder

Status: PRODUCTION READY

Real-time equipment optimization engine for building optimal character loadouts by searching across multiple characters' inventories (mules). Uses Mag-SuitBuilder constraint satisfaction algorithms.

Core Features:

• Multi-character inventory search across 100+ characters, 25,000+ items
• Armor set constraints (primary 5-piece + secondary 4-piece set support)
• Cantrip/ward spell optimization with bitmap-based overlap detection
• Crit damage rating optimization
• Locked slots with set/spell preservation across searches
• Real-time SSE streaming with progressive phase updates
• Suit summary with copy-to-clipboard functionality
• Stable deterministic sorting for reproducible results

Access: /suitbuilder.html

Architecture Details: See docs/plans/2026-02-09-suitbuilder-architecture.md

Known Limitations

• Slot-aware spell filtering not yet implemented (e.g., underclothes have limited spell pools but system treats all slots equally)
• All spells weighted equally (no priority/importance weighting yet)
• See architecture doc for future enhancement roadmap

Technical Notes for Development

Database Performance

• Connection pool: 5-20 connections (configured in db_async.py)
• Under heavy error load, pool exhaustion can cause 2-minute query timeouts
• Portal error fix significantly improved database performance

Docker Development Workflow

1. Code Changes: Edit source files locally
2. Rebuild: docker compose build --no-cache dereth-tracker (required for code changes)
3. Deploy: docker compose up -d dereth-tracker
4. Debug: docker logs mosswartoverlord-dereth-tracker-1 and docker logs dereth-db

Frontend Architecture

• Main Map: static/index.html - Real-time player tracking
• Inventory Search: static/inventory.html - Advanced item filtering
• Suitbuilder: static/suitbuilder.html - Equipment optimization interface
• All static files: Served directly by FastAPI StaticFiles

DOM Optimization Status ✅ COMPLETE (September 2025)

• Achievement: 100% DOM element reuse with zero element creation after initial render
• Performance: ~5ms render time for 69 players, eliminated 4,140+ elements/minute creation
• Implementation: Element pooling system with player name mapping for O(1) lookup
• Monitoring: Color-coded console output (✨ green = optimized, ⚡ yellow = partial, 🔥 red = poor)
• Status: Production ready - achieving perfect element reuse consistently

Current Render Stats:

• ✅ This render: 0 dots created, 69 reused | 0 list items created, 69 reused
• ✅ Lifetime: 69 dots created, 800+ reused | 69 list items created, 800+ reused

Remaining TODO:

• ❌ Fix CSS Grid layout for player sidebar (deferred per user request)
• ❌ Extend optimization to trails and portal rendering
• ❌ Add memory usage tracking

WebSocket Endpoints

• /ws/position: Plugin telemetry, inventory, portal, rare events (authenticated)
• /ws/live: Browser client commands and live updates (unauthenticated)

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Overlord Assistant Mode

When invoked through the dashboard's chat window (the 🤖 Assistant button) or through /api/agent/ask, you are acting as the Overlord Assistant — answering ad-hoc questions for the user about their live multi-account Asheron's Call setup.

You have MCP tools (from .mcp.json) for live game data. Always use them instead of guessing or apologising for not having data:

• get_live_players — current online characters with positions/kills/state
• get_recent_rares — rare item finds in the last N hours
• query_telemetry_db — read-only SQL on the telemetry DB for ad-hoc analysis
• (more tools added over time — call list_tools if unsure)

Behaviour rules

1. Use tools, don't speculate. If the user asks "how many chars are online" — call get_live_players. Don't say "I'd need to check" — just check.
2. Be concise. The user is glancing at a chat window, not reading a report. 2-5 sentences for most answers. Use markdown tables for tabular data.
3. No code unless asked. This mode is about operating the system, not editing it. Don't open files or write code unless the user explicitly asks.
4. Real numbers, real names. Cite actual character names and counts from tools — never make up sample data.
5. Read-only. You cannot mutate the database; the SQL tool will reject any non-SELECT statement and the role is also GRANT SELECT only. If a question requires a write, say so.
6. Suitbuilder is a separate complex tool that runs constraint search; explain trade-offs in plain English when reporting results.
7. Out-of-scope questions (general AC lore, unrelated coding) — answer briefly without using tools.

Available data tables (for query_telemetry_db)

• telemetry_events (hypertable, 30-day retention) — position/state snapshots every ~2s per character
• rare_events — rare item find log
• spawn_events (hypertable, 7-day retention) — monster spawn observations
• portals — discovered portal coords (1h dedup window)
• char_stats, rare_stats, rare_stats_sessions — lifetime/session aggregates
• character_stats — latest full stats JSON per character
• combat_stats, combat_stats_sessions — combat tracking
• server_status — current Coldeve game-server state (single row)

If asked about something not covered above, look in db_async.py for the schema or just try a query and report what you see.