docs: Add Phase 1 completion documentation and plugin directory README

Copilot · huangyiirene · Copilot · commit d63ded2331f0 · 2026-01-21T12:30:28.000Z
Co-authored-by: huangyiirene &lt;7665279+huangyiirene@users.noreply.github.com&gt;
diff --git a/PHASE_1_COMPLETE.md b/PHASE_1_COMPLETE.md
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+# Phase 1 Migration Complete: Foundation & Core Types
+
+## Overview
+
+Phase 1 of the ObjectQL v4.0 migration has been completed. This phase establishes the foundation for the new plugin-based architecture.
+
+## What Changed
+
+### 1. New Directory Structure
+
+```
+packages/
+├── core/
+│   └── types/              # NEW: @objectql/types v4.0.0
+├── plugins/                # NEW: Plugin directory (empty, ready for plugins)
+├── foundation/             # EXISTING: v3.x packages (unchanged)
+│   ├── types/              # Will be deprecated in future
+│   ├── core/
+│   └── platform-node/
+├── drivers/                # EXISTING: Will be migrated to plugins
+└── tools/                  # EXISTING: Will be updated
+```
+
+### 2. New Package: @objectql/types v4.0.0
+
+A new types package has been created at `packages/core/types/` with:
+
+#### Plugin Interfaces
+
+- **`BasePlugin`** - Base interface for all plugins
+- **`QueryProcessorPlugin`** - For query validation, optimization, transformation
+- **`RepositoryPlugin`** - For extending repositories with batch ops, audit tracking
+- **`PluginMetadata`** - Plugin metadata and dependencies
+- **`PluginLifecycle`** - Setup and teardown hooks
+
+#### Query Types
+
+- **`UnifiedQuery`** - Core query structure
+- **`FilterExpression`** - Type-safe filter expressions  
+- **`QueryResult`** - Query results with pagination metadata
+- **`QueryOptions`** - Query execution options
+
+#### Runtime Types
+
+- **`RuntimeContext`** - Context available to plugins
+- **`ValidationResult`** - Query validation results
+- **`ValidationError`** - Validation error details
+
+### 3. Type Removals
+
+The following types have been removed from the new v4.0 package as they are now provided by `@objectstack/spec` or `@objectstack/runtime`:
+
+#### Removed (Now in @objectstack/spec):
+- `Driver` interface → Use `DriverInterface` from `@objectstack/spec`
+
+#### Removed (Now in @objectstack/runtime):
+- `MetadataRegistry` class
+- `Context` types
+- `Hook` types  
+- `Action` types
+
+### 4. Workspace Configuration
+
+- **pnpm-workspace.yaml**: Added `packages/core/*` and `packages/plugins/*`
+- **tsconfig.json**: Added reference to `packages/core/types`
+
+## Migration Impact
+
+### For Plugin Developers
+
+If you're developing plugins, use the new interfaces:
+
+```typescript
+// New v4.0 plugin
+import { QueryProcessorPlugin } from '@objectql/types';
+
+export function myPlugin(): QueryProcessorPlugin {
+  return {
+    name: '@myorg/plugin',
+    version: '1.0.0',
+    type: 'query-processor',
+    
+    async validateQuery(ast, context) {
+      return { valid: true, errors: [] };
+    },
+    
+    async beforeQuery(ast, context) {
+      return ast;
+    }
+  };
+}
+```
+
+### For Application Developers
+
+**No immediate action required.** The existing `@objectql/types` (v3.x) in `packages/foundation/types` remains unchanged and will continue to work.
+
+The new package at `packages/core/types` is for new plugin development and will be used by migrated packages in future phases.
+
+## Dependencies
+
+The new `@objectql/types` v4.0.0 depends on:
+
+- `@objectstack/spec` ^0.2.0 - Protocol specifications
+- `@objectstack/runtime` ^0.2.0 - Runtime types
+
+These packages provide the foundation for driver interfaces, metadata management, and runtime context.
+
+## Build Verification
+
+The new package has been built and verified:
+
+✅ TypeScript compilation successful  
+✅ All type definitions generated  
+✅ No circular dependencies  
+✅ Strict type checking enabled
+
+## Next Steps
+
+### Phase 2: Core Plugin Migration (Week 3-4)
+
+The following will be migrated in the next phase:
+
+- Create `@objectql/query-validation` plugin
+- Create `@objectql/advanced-repository` plugin
+- Extract functionality from `@objectql/core`
+
+### Phase 3: Driver Migration (Week 5-6)
+
+Drivers will be migrated to the plugin architecture:
+
+- `@objectql/driver-sql`
+- `@objectql/driver-memory`
+- `@objectql/driver-mongo`
+- `@objectql/driver-sdk`
+
+## Documentation
+
+- **Plugin Architecture**: See [PLUGIN_ARCHITECTURE.md](./PLUGIN_ARCHITECTURE.md)
+- **Package Restructuring**: See [PACKAGE_RESTRUCTURING.md](./PACKAGE_RESTRUCTURING.md)
+- **Implementation Roadmap**: See [IMPLEMENTATION_ROADMAP.md](./IMPLEMENTATION_ROADMAP.md)
+- **Plugin Directory**: See [packages/plugins/README.md](./packages/plugins/README.md)
+- **New Types Package**: See [packages/core/types/README.md](./packages/core/types/README.md)
+
+## Questions or Issues?
+
+If you encounter any issues with the new type definitions or have questions about plugin development, please open an issue on GitHub.
+
+---
+
+**Phase 1 Status**: ✅ Complete  
+**Date**: 2026-01-21  
+**Next Phase**: Week 3-4 (Core Plugin Migration)
diff --git a/packages/plugins/README.md b/packages/plugins/README.md
@@ -0,0 +1,96 @@
+# ObjectQL Plugins
+
+This directory contains official ObjectQL plugins that extend the core query functionality.
+
+## Overview
+
+ObjectQL v4.0 is built on a plugin-based architecture. Each plugin provides specialized functionality:
+
+- **Query Processors**: Validate, optimize, and transform queries
+- **Repository Extensions**: Add batch operations, audit tracking, soft deletes
+- **Feature Plugins**: Formula engines, AI query generation, caching
+- **Driver Plugins**: Database adapters (SQL, MongoDB, Redis, etc.)
+
+## Plugin Categories
+
+### Query Processing Plugins
+
+Enhance the query execution pipeline:
+
+- `query-validation` - Query AST validation
+- `query-optimizer` - Query optimization and performance improvements  
+- `query-cache` - Query result caching
+
+### Repository Plugins
+
+Extend repository capabilities:
+
+- `advanced-repository` - Batch operations, upsert, soft delete, audit tracking
+
+### Feature Plugins
+
+Add specialized capabilities:
+
+- `formula-engine` - Formula parsing and evaluation
+- `ai-query-generator` - Natural language to QueryAST conversion
+
+## Creating a Plugin
+
+All plugins must implement one of the plugin interfaces from `@objectql/types`:
+
+```typescript
+import { QueryProcessorPlugin } from '@objectql/types';
+
+export function myPlugin(): QueryProcessorPlugin {
+  return {
+    name: '@objectql/my-plugin',
+    version: '1.0.0',
+    type: 'query-processor',
+    
+    async setup(runtime) {
+      // Initialize plugin
+    },
+    
+    async validateQuery(ast, context) {
+      // Validate query
+      return { valid: true, errors: [] };
+    },
+    
+    async beforeQuery(ast, context) {
+      // Transform query before execution
+      return ast;
+    }
+  };
+}
+```
+
+## Plugin Development
+
+See [PLUGIN_ARCHITECTURE.md](../../PLUGIN_ARCHITECTURE.md) for detailed documentation on:
+
+- Plugin types and interfaces
+- Lifecycle hooks
+- Plugin composition
+- Best practices
+- Testing strategies
+
+## Official Plugins
+
+Plugins will be added as they are migrated from the v3.x architecture:
+
+- [ ] `@objectql/query-validation` - Week 7-8
+- [ ] `@objectql/advanced-repository` - Week 9-10
+- [ ] `@objectql/formula-engine` - Week 11-12
+- [ ] `@objectql/query-optimizer` - Week 13-14
+- [ ] `@objectql/query-cache` - Week 15-16
+- [ ] `@objectql/ai-query-generator` - Week 17-18
+
+See [IMPLEMENTATION_ROADMAP.md](../../IMPLEMENTATION_ROADMAP.md) for the full migration timeline.
+
+## Community Plugins
+
+Community-developed plugins will be listed here as they become available.
+
+## License
+
+MIT © ObjectStack Inc.
