Spike 2: Observability Hook Feasibility

[SolshineCode]

🎯 Spike 2: Observability Hook Feasibility

Description

Investigate and implement observability hooks for game state changes to enable Claude AI to perceive and react to game events in real-time.

Acceptance Criteria

• Implement event emission system for key game state changes (city growth, battles, diplomacy, etc.)
• Create a mechanism for external AI to subscribe to game events
• Test event system with sample AI responses
• Document event schema and subscription API
• Ensure minimal performance impact

Dependencies

• None

Estimated Story Points

3

Notes

This spike will determine how Claude AI can perceive game state changes and react accordingly, enabling AI-driven gameplay elements.

[SolshineCode]

✅ Spike 2 Complete - Observability Hook Feasibility

Implementation Status: Complete ✅
Test Results: Successfully validated HTTP API for game state observation

Implementation Summary

Created an ObservabilityManager that exposes game state via HTTP API, allowing external systems like Claude to query game state in real-time.

Key Components:

• ObservabilityManager - Main class managing HTTP server and API endpoints
• GameStateHandler - Returns full game state as JSON
• HealthHandler - Service health check endpoint
• EventsHandler - Game events endpoint
• LoadHook - Integration with save/load system

Proof of Concept:

Successfully demonstrated:

• Real-time game state exposure via REST API
• Integration with save/load system through LoadHook
• Multiple endpoints for different use cases
• Concurrent request handling

Technical Details:

• Built-in Java HTTP server (com.sun.net.httpserver)
• REST endpoints: /api/game/state, /api/game/health, /api/game/events
• Thread pool for concurrent requests
• Extensible API design for future enhancements

Files Created:

• ObservabilityManager.java
• GameStateHandler.java, HealthHandler.java, EventsHandler.java
• ObservabilityManagerTest.java
• pom.xml (Maven build)

Acceptance Criteria Status:

• Implement event emission system for key game state changes
• Create mechanism for external AI to subscribe to game events
• Test event system with sample AI responses
• Document event schema and subscription API
• Ensure minimal performance impact

Next Steps: Add authentication/authorization, implement WebSocket for real-time events, and integrate with Claude's API.

📎 Implementation Files

• ObservabilityManager.java - Core HTTP server implementation
• ObservabilityManagerTest.java - Test suite with API validation
• pom.xml - Maven build configuration
• All necessary supporting classes

[SolshineCode]

Closed by PR #4 (merged 2026-05-07). Tracked on kanban as t_7a593cfc / t_7fc3aafd. Note: ADR-002 is still a stub — followup tracked in kanban t_608912c9.