Phase 2 Core Infrastructure Modernization: Final Status Report

[Copilot]

Epic #225 requested a final review of all Phase 2 Feature sub-issues and their tasks, with a status report documenting completed work and remaining gaps as actionable tasks.

What's in the report (PHASE2_STATUS_REPORT.md)

Feature-by-feature assessment (#190–#195)

• Each Feature issue is cross-referenced against its Task issues and verified against actual source code — not just issue state
• All 6 Feature issues are closed; 13 Task issues (Setup Service Container #209–Configuration Migration Utilities #221) remain open and need closure/reconciliation

Success criteria gap analysis

Criterion	Result
90%+ components use DI	🔴 ~35–40% — service-locator pattern only; constructor injection not rolled out
All configs schema-validated	🟡 6/~12 schemas exist; JsonSchemaValidator not auto-wired into JsonConfigurationLoader
Test coverage > 60%	✅ 355 tests, ~72% DI / ~65% config
Performance baseline & monitoring	✅ Dashboard, metrics, regression detection complete
Zero critical architecture violations	✅ EventBus, CQRS, Repository infrastructure in place

10 specific remaining work items (P2-R1 – P2-R10) formatted as GitHub Task candidates, covering:

• CQRS call-site wiring across entry points, extension handlers, and base classes (196 call sites; ~4 days total across P2-R1–R4)
• EventBus subscriber migration away from legacy += delegates (P2-R5)
• Missing event types: AppQuitEvent, CalibrationEndEvent, DisplaySettingsChangedEvent, WordPredictionContextChangedEvent (P2-R6)
• Schema validation auto-wiring into JsonConfigurationLoader (P2-R7)
• Schema expansion to remaining config types (P2-R8)
• Tier-2 constructor injection rollout (P2-R9)
• Issue tracker reconciliation — close/duplicate the 13 open tasks (P2-R10)

Recommended sequencing: P2-R10 → P2-R7 → P2-R1 → P2-R2/R3 → P2-R4/R5/R6 → P2-R8/R9

Original prompt

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This section details on the original issue you should resolve

<issue_title>Phase 2 - Core Infrastructure Modernization</issue_title>
<issue_description>Build on Phase 1 foundation to modernize core infrastructure, implement dependency injection, enhance testing, and improve architecture patterns.

Goals:

• Implement Dependency Injection throughout application
• Enhance configuration system with validation
• Establish comprehensive testing infrastructure
• Improve performance monitoring and diagnostics
• Modernize architecture patterns

Success Criteria:

• 90%+ of components use dependency injection
• All configuration files have schema validation
• Test coverage > 60% for core libraries
• Performance baseline established and monitored
• Zero critical architecture violations

---

Estimated Duration: 14 weeks

</issue_description>

<agent_instructions>Do a final review of this Epic User story. Check each of the Feature sub issues and their subsequent tasks. Review all of the documentation you can find in the repository on the progress and status of Phase 2 and create a final Phase 2 Status Update report. If you determine that there is still some development work required to complete the phase, just document it in a way that could be turned into a set of additional Tasks for the development team to work on. This work should not result in any code changes.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Phase 2 - Core Infrastructure Modernization #225

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