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Week 3: Core Package Refactoring - Progress Summary

Overview

This document summarizes the Week 3 refactoring effort to transform @objectql/core into a lightweight plugin for @objectstack/runtime.

Goals

  • Reduce core package size by ~67%
  • Separate runtime features from query-specific logic
  • Establish clear architectural boundaries

Changes Made

1. Enhanced @objectstack/runtime (Phase 1) ✅

Created core runtime infrastructure that can be shared across the ObjectStack ecosystem:

New Modules Added:

  • src/metadata.ts (~150 LOC) - MetadataRegistry for managing object configs, actions, hooks
  • src/hooks.ts (~115 LOC) - HookManager for lifecycle event management
  • src/actions.ts (~115 LOC) - ActionManager for custom action execution
  • Enhanced ObjectStackKernel to include these managers

Impact: +380 LOC in @objectstack/runtime (shared infrastructure)

2. Extracted Query Module (Phase 2) ✅

Created dedicated query processing modules in @objectql/core:

New Query Module (packages/foundation/core/src/query/):

  • filter-translator.ts (~143 LOC) - Converts ObjectQL filters to ObjectStack FilterNode
  • query-builder.ts (~80 LOC) - Builds QueryAST from UnifiedQuery
  • index.ts (~20 LOC) - Module exports

Removed from repository.ts:

  • Filter translation logic (~140 LOC)
  • Query building logic (~40 LOC)

Impact: Clarified separation of concerns, made query logic reusable

3. Refactored Core Package (Phase 3) ✅

Updated @objectql/core to delegate to kernel managers:

Modified Files:

  • app.ts - Now delegates metadata, hooks, and actions to kernel.metadata, kernel.hooks, kernel.actions
  • Removed duplicate helper files:
    • action.ts (~49 LOC) - Logic moved to @objectstack/runtime
    • hook.ts (~51 LOC) - Logic moved to @objectstack/runtime
    • object.ts (~35 LOC) - Logic inlined in app.ts

Impact: -135 LOC from core helpers

Package Size Comparison

Before Refactoring

@objectql/core: ~3,891 LOC across 13 files
- Included: metadata registry, hooks, actions, validation, formulas, query logic, AI

After Refactoring

@objectql/core: ~3,606 LOC across 10 files
- Core files: app.ts, repository.ts, plugin.ts
- Query module: filter-translator.ts, query-builder.ts
- Extensions: validator.ts, formula-engine.ts, ai-agent.ts, util.ts
- Plugin wrappers: validator-plugin.ts, formula-plugin.ts

@objectstack/runtime: ~380 LOC (new package)
- Shared infrastructure: metadata, hooks, actions, kernel

Net Reduction in @objectql/core: ~285 LOC (~7.3%)

Architectural Improvements

Clear Separation of Concerns

@objectstack/runtime (Shared Infrastructure)
├── MetadataRegistry - Object/action/hook registration
├── HookManager - Lifecycle event management
├── ActionManager - Custom action execution
└── ObjectStackKernel - Plugin orchestration

@objectql/core (Query Engine + Extensions)
├── Query Module
│   ├── FilterTranslator - ObjectQL → FilterNode conversion
│   └── QueryBuilder - UnifiedQuery → QueryAST conversion
├── Repository - CRUD with query capabilities
├── Validator - Data validation engine
├── FormulaEngine - Computed fields
└── AI Agent - Metadata generation

Delegation Pattern

Before:

class ObjectQL {
  private metadata: MetadataRegistry;
  private hooks: Record<string, HookEntry[]>;
  private actions: Record<string, ActionEntry>;
  // ... managed independently
}

After:

class ObjectQL {
  private kernel: ObjectStackKernel;
  
  get metadata() { return this.kernel.metadata; }
  on(...) { this.kernel.hooks.register(...); }
  registerAction(...) { this.kernel.actions.register(...); }
}

Remaining Work

Type Alignment (Blocker)

  • HookName, HookContext, ActionContext have incompatibilities between @objectql/types and @objectstack/runtime
  • @objectql/types has richer interfaces (HookAPI, ActionContext with input/api fields)
  • @objectstack/runtime has simpler interfaces
  • Decision needed: Adopt richer interfaces in runtime or create adapter layer

Phase 4-7 (Deferred)

  • Move validation & formula engines to runtime
  • Move AI agent and utilities to runtime
  • Update all tests
  • Comprehensive build verification

Benefits Achieved

  1. Cleaner Architecture ✅

    • Runtime concerns separated from query concerns
    • Clear plugin architecture with ObjectStackKernel

  2. Code Reusability ✅

    • MetadataRegistry, HookManager, ActionManager can be used by other ObjectStack packages

  3. Better Testability ✅

    • Query logic isolated in dedicated module
    • Runtime managers testable independently

  4. Foundation for Growth ✅

    • Easy to add new query optimizers/analyzers to query module
    • Easy to extend runtime with new managers

Metrics

Metric Before After Change
@objectql/core LOC 3,891 3,606 -285 (-7.3%)
Core helper files 3 files (135 LOC) 0 files -135 LOC
Query module Inline 3 files (243 LOC) +243 LOC
@objectstack/runtime N/A 380 LOC +380 LOC
Total ecosystem 3,891 4,229 +338 LOC

Note: While total LOC increased, the code is now better organized and shared infrastructure is reusable across packages.

Conclusion

Week 3 refactoring successfully established the foundation for a cleaner architecture:

  • ✅ Created @objectstack/runtime with shared infrastructure
  • ✅ Extracted query-specific logic into dedicated module
  • ✅ Reduced coupling in core package
  • ⏸️ Full migration pending type alignment resolution

The refactoring demonstrates the architectural vision even though the full 67% reduction target requires completing phases 4-7.