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memory bank
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‎memory-bank/activeContext.md‎

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# Active Context
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## Current Status
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**Last Updated**: 2026-03-28
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## Current Work
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### Promisification Implementation
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**Status**: ✅ COMPLETE
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Promise-based wrapper classes are implemented in [`lib/promise/`](../lib/promise/):
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- [`SqliteDatabase`](../lib/promise/database.js) - Promise wrapper for `Database`
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- [`SqliteStatement`](../lib/promise/statement.js) - Promise wrapper for `Statement`
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- [`SqliteBackup`](../lib/promise/backup.js) - Promise wrapper for `Backup`
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- [`index.js`](../lib/promise/index.js) - Module exports
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**Features Implemented**:
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- Static factory method `SqliteDatabase.open(filename, mode)`
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- All async methods return Promises
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- Transaction support: `beginTransaction()`, `commitTransaction()`, `rollbackTransaction()`
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- `each()` method with row callback pattern
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- Event emitter support preserved
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## Pending Tasks
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No active tasks currently assigned.
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## Recent Changes
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- Memory-bank structure created with UMB workflow support
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- Promisification implementation verified as complete
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## Open Questions
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None currently.
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## Next Steps
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Awaiting new task assignments.

‎memory-bank/build-system.md‎

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"src/statement.cc"
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],
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"defines": [
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"NAPI_VERSION=<(napi_build_version)",
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"NAPI_DISABLE_CPP_EXCEPTIONS=1"
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"NAPI_VERSION=<(napi_build_version)"
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]
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// ... more config
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}

‎memory-bank/custom-instructions.md‎

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# AI Agent Instructions
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> These instructions are for AI agents (like Roo/Cline) working on this project.
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## Command Execution
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- Do not prefix commands with `cd /home/gms/gms/projects/hot/node-sqlite3 &&` when the command should run in the current workspace directory
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- Use `yarn test`, `yarn lint` instead of npm run scripts (e.g., avoid `npm run test`, use `yarn test` instead)
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## Notes
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These instructions apply to all future sessions working in this project.
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## Memory Bank
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The most important part of the Memory Bank is keeping it updated. Currently, the community standard is the UMB (Update Memory Bank) routine:
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- Before you start a task: Ask your AI agent, "Read the memory bank and tell me the current status."
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- While working, the AI agent will occasionally suggest updates to activeContext.md.
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- Before you end a session: Simply type "UMB" or "Update memory bank". The AI agent will then:
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- Move completed items from activeContext.md to progress.md.
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- Log any new technical decisions in decisionLog.md.
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- Clear the activeContext.md for the next session.

‎memory-bank/decisionLog.md‎

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# Decision Log
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## Technical Decisions
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### 2026-03-29: NAPI Exception Handling
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**Decision**: Use `node_addon_api_except` instead of `NAPI_DISABLE_CPP_EXCEPTIONS=1`
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**Rationale**:
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- Commit 48e95e8a0d32277449c269b41fba6419acb21418 changed the build configuration
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- Using `node_addon_api_except` from node-addon-api provides proper exception handling support
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- This is the recommended approach for modern node-addon-api versions
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**Files Changed**:
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- `binding.gyp`: Changed from `node_addon_api` to `node_addon_api_except` dependency
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---
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### 2026-03-28: Memory Bank Structure
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**Decision**: Adopt UMB (Update Memory Bank) workflow with standard file structure.
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**Rationale**: Following 2026 community standards for AI agent context management.
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**Files Created**:
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- `activeContext.md` - Current work status
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- `progress.md` - Completed work history
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- `decisionLog.md` - Technical decisions record
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---
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### Promisification Architecture
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**Decision**: Create Promise-based wrapper classes alongside callback-based classes.
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**Status**: ✅ IMPLEMENTED
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**Rationale**:
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- Maintains backward compatibility with existing callback API
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- Provides modern async/await support
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- Follows established pattern from sqlite3orm reference implementation
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**Implementation**:
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- New classes: `SqliteDatabase`, `SqliteStatement`, `SqliteBackup`
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- Exported from `lib/promise/index.js`
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- Generic type parameters for TypeScript type inference
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- Transaction support with `beginTransaction()`, `commitTransaction()`, `rollbackTransaction()`
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- Static factory method `SqliteDatabase.open()`
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**Alternatives Considered**:
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1. Modify existing classes to return Promises - Rejected (breaks backward compatibility)
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2. Create separate package - Deferred (can be refactored later if needed)
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---
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### Node.js Version Requirement
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**Decision**: Require Node.js >= 20.17.0
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**Rationale**:
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- Modern NAPI support
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- Latest performance improvements
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- Simplified maintenance
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---
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### Build System Choice
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**Decision**: Use node-gyp with prebuild for binary distribution
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**Rationale**:
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- Established tool for native addons
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- Prebuilt binaries reduce installation friction
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- Supports multiple NAPI versions (3, 6)
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---
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### SQLite Configuration
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**Decision**: Bundle SQLite with enabled extensions
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**Extensions Enabled**:
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- `SQLITE_THREADSAFE=1` - Thread safety
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- `SQLITE_ENABLE_FTS3/4/5` - Full-text search
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- `SQLITE_ENABLE_RTREE` - R-Tree index
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- `SQLITE_ENABLE_DBSTAT_VTAB=1` - Database stats
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- `SQLITE_ENABLE_MATH_FUNCTIONS` - Math functions
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**Rationale**: Provides comprehensive SQLite functionality out of the box.
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---
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### Test Framework
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**Decision**: Use mocha with 480s timeout
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**Rationale**:
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- Established test suite
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- Handles async operations well
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- Compatible with existing tests

‎memory-bank/development.md‎

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├── unicode.test.js # Unicode handling tests
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├── update_hook.test.js # Update hook tests
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├── upsert.test.js # UPSERT tests
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└── verbose.test.js # Verbose mode tests
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├── verbose.test.js # Verbose mode tests
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└── promise.test.js # Promise API tests
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```
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### Running Specific Tests
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});
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```
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## Promise API
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The project includes Promise-based wrappers for modern async/await support:
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### Using Promise API
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```javascript
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const { SqliteDatabase } = require('@homeofthings/sqlite3/promise');
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// Static factory method
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const db = await SqliteDatabase.open(':memory:');
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// Run queries
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const result = await db.run('CREATE TABLE foo (id INT, name TEXT)');
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const row = await db.get('SELECT * FROM foo WHERE id = ?', [1]);
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const rows = await db.all('SELECT * FROM foo');
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// Transactions
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await db.beginTransaction();
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await db.run('INSERT INTO foo VALUES (1, "test")');
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await db.commitTransaction();
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// Prepared statements
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const stmt = await db.prepare('INSERT INTO foo VALUES (?, ?)');
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await stmt.run(1, 'test');
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await stmt.finalize();
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// Close
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await db.close();
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```
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### Promise Classes
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| Class | Description |
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|-------------------|---------------------------------|
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| `SqliteDatabase` | Promise wrapper for `Database` |
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| `SqliteStatement` | Promise wrapper for `Statement` |
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| `SqliteBackup` | Promise wrapper for `Backup` |
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See [`lib/promise/`](../lib/promise/) for implementation details.
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## Code Style
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### Linting

‎memory-bank/progress.md‎

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# Progress Log
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## 2026-03-29
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### Memory Bank Update
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- Removed `NAPI_DISABLE_CPP_EXCEPTIONS` from documentation (commit 48e95e8a0d32277449c269b41fba6419acb21418)
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- Updated `build-system.md` and `project-overview.md` to reflect current binding.gyp configuration
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## 2026-03-28
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### Memory Bank Setup
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- Created UMB-compliant memory-bank structure
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- Added `activeContext.md` for current work tracking
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- Added `progress.md` for completed work history
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- Added `decisionLog.md` for technical decisions
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- Updated to reflect actual project state
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### Promisification Implementation (VERIFIED COMPLETE)
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- Promise-based wrapper classes implemented in [`lib/promise/`](../lib/promise/)
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- `SqliteDatabase` class with full API coverage
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- `SqliteStatement` class with all methods
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- `SqliteBackup` class for backup operations
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- Transaction support: `beginTransaction()`, `commitTransaction()`, `rollbackTransaction()`
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- Static factory method `SqliteDatabase.open()`
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- Tests in [`test/promise.test.js`](../test/promise.test.js)
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## Earlier Sessions
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### Project Setup
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- Established Node.js >= 20.17.0 requirement
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- Configured yarn package manager
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- Set up ESLint with `.eslintrc.js`
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- Configured node-gyp build system
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### Build System
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- Configured Debug and Release builds
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- Set up prebuild for binary distribution
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- Enabled SQLite extensions: FTS3/4/5, R-Tree, math functions
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### Testing Infrastructure
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- Set up mocha test framework
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- Created test support utilities
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- Established test database creation pattern

‎memory-bank/project-overview.md‎

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│ ├── sqlite3.js # Main module entry point
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│ ├── sqlite3-binding.js # Native binding loader
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│ ├── sqlite3.d.ts # TypeScript declarations
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│ └── trace.js # Stack trace augmentation for verbose mode
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│ ├── trace.js # Stack trace augmentation for verbose mode
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│ └── promise/ # Promise-based API wrappers
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│ ├── index.js # Promise module exports
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│ ├── database.js # SqliteDatabase class
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│ ├── statement.js # SqliteStatement class
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│ └── backup.js # SqliteBackup class
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├── src/ # C++ native addon
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│ ├── node_sqlite3.cc # Main addon entry
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- **trace.js**: Stack trace augmentation for verbose mode
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- Extends error stack traces to include operation context
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- **promise/**: Promise-based API wrappers (modern async/await support)
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- `SqliteDatabase` class: `open()`, `close()`, `run()`, `get()`, `all()`, `each()`, `exec()`, `prepare()`, `backup()`
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- `SqliteStatement` class: `bind()`, `reset()`, `finalize()`, `run()`, `get()`, `all()`, `each()`
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- `SqliteBackup` class: `step()`, `finish()`
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- Transaction support: `beginTransaction()`, `commitTransaction()`, `rollbackTransaction()`
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- Static factory: `SqliteDatabase.open(filename, mode)`
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- **node_sqlite3.cc**: Module initialization, exports `Database`, `Statement`, `Backup` classes
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- **binding.gyp**: node-gyp configuration
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- Builds `node_sqlite3` target
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- Links against SQLite (internal or external)
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- Defines `NAPI_VERSION` and `NAPI_DISABLE_CPP_EXCEPTIONS=1`
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- Defines `NAPI_VERSION` based on the target Node.js version
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- **deps/common-sqlite.gypi**: Common build configurations
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- `Debug` configuration: disables `NDEBUG`, enables debug symbols

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