294 lines
14 KiB
Markdown
294 lines
14 KiB
Markdown
# TSPM Architecture Refactoring Plan
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## Current Problems
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The current architecture has several issues that make the codebase confusing:
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1. **Flat structure confusion**: All classes are mixed together in the `ts/` directory with a `classes.` prefix naming convention
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2. **Unclear boundaries**: It's hard to tell what code runs in the daemon vs the client
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3. **Misleading naming**: The `Tspm` class is actually the core ProcessManager, not the overall system
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4. **Coupling risk**: Client code could accidentally import daemon internals, bloating bundles
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5. **No architectural enforcement**: Nothing prevents cross-boundary imports
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## Goal
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Refactor into a clean 3-folder architecture (daemon/client/shared) with proper separation of concerns and enforced boundaries.
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## Key Insights from Architecture Review
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### Why This Separation Makes Sense
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After discussion with GPT-5, we identified that:
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1. **ProcessManager/Monitor/Wrapper are daemon-only**: These classes actually spawn and manage processes. Clients never need them - they only communicate via IPC.
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2. **The client is just an IPC bridge**: The client (CLI and library users) only needs to send messages to the daemon and receive responses. It should never directly manage processes.
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3. **Shared should be minimal**: Only the IPC protocol types and pure utilities should be shared. No Node.js APIs, no file system access.
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4. **Protocol is the contract**: The IPC types are the only coupling between client and daemon. This allows independent evolution.
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## Architecture Overview
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### Folder Structure
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- **ts/daemon/** - Process orchestration (runs in daemon process only)
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- Contains all process management logic
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- Spawns and monitors actual system processes
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- Manages configuration and state
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- Never imported by client code
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- **ts/client/** - IPC communication (runs in CLI/client process)
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- Only knows how to talk to the daemon via IPC
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- Lightweight - no process management logic
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- What library users import when they use TSPM
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- Can work in any Node.js environment (or potentially browser)
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- **ts/shared/** - Minimal shared contract (protocol & pure utilities)
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- **protocol/** - IPC request/response types, error codes, version
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- **common/** - Pure utilities with no environment dependencies
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- No fs, net, child_process, or Node-specific APIs
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- Keep as small as possible to minimize coupling
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## File Organization Rationale
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### What Goes in Daemon
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These files are daemon-only because they actually manage processes:
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- `processmanager.ts` (was Tspm) - Core process orchestration logic
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- `processmonitor.ts` - Monitors memory and restarts processes
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- `processwrapper.ts` - Wraps child processes with logging
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- `tspm.config.ts` - Persists process configurations to disk
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- `tspm.daemon.ts` - Wires everything together, handles IPC requests
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### What Goes in Client
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These files are client-only because they just communicate:
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- `tspm.ipcclient.ts` - Sends requests to daemon via Unix socket
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- `tspm.servicemanager.ts` - Manages systemd service (delegates to smartdaemon)
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- CLI files - Command-line interface that uses the IPC client
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### What Goes in Shared
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Only the absolute minimum needed by both:
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- `protocol/ipc.types.ts` - Request/response type definitions
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- `protocol/error.codes.ts` - Standardized error codes
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- `common/utils.errorhandler.ts` - If it's pure (no I/O)
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- Parts of `paths.ts` - Constants like socket path (not OS-specific resolution)
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- Plugin interfaces only (not loading logic)
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### Critical Design Decisions
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1. **Rename Tspm to ProcessManager**: The class name should reflect what it does
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2. **No process management in shared**: ProcessManager, ProcessMonitor, ProcessWrapper are daemon-only
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3. **Protocol versioning**: Add version to allow client/daemon compatibility
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4. **Enforce boundaries**: Use TypeScript project references to prevent violations
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5. **Control exports**: Package.json exports map ensures library users can't import daemon code
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## Detailed Task List
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### Phase 1: Create New Structure
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- [x] Create directory `ts/daemon/`
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- [x] Create directory `ts/client/`
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- [x] Create directory `ts/shared/`
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- [x] Create directory `ts/shared/protocol/`
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- [x] Create directory `ts/shared/common/`
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### Phase 2: Move Daemon Files
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- [x] Move `ts/daemon.ts` → `ts/daemon/index.ts`
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- [x] Move `ts/classes.daemon.ts` → `ts/daemon/tspm.daemon.ts`
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- [x] Move `ts/classes.tspm.ts` → `ts/daemon/processmanager.ts`
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- [x] Move `ts/classes.processmonitor.ts` → `ts/daemon/processmonitor.ts`
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- [x] Move `ts/classes.processwrapper.ts` → `ts/daemon/processwrapper.ts`
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- [x] Move `ts/classes.config.ts` → `ts/daemon/tspm.config.ts` Move `ts/classes.config.ts` → `ts/daemon/tspm.config.ts`
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### Phase 3: Move Client Files
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- [x] Move `ts/classes.ipcclient.ts` → `ts/client/tspm.ipcclient.ts`
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- [x] Move `ts/classes.servicemanager.ts` → `ts/client/tspm.servicemanager.ts`
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- [x] Create `ts/client/index.ts` barrel export file Create `ts/client/index.ts` barrel export file
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### Phase 4: Move Shared Files
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- [x] Move `ts/ipc.types.ts` → `ts/shared/protocol/ipc.types.ts`
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- [x] Create `ts/shared/protocol/protocol.version.ts` with version constant
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- [x] Create `ts/shared/protocol/error.codes.ts` with standardized error codes
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- [x] Move `ts/utils.errorhandler.ts` → `ts/shared/common/utils.errorhandler.ts`
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- [ ] Analyze `ts/paths.ts` - split into constants (shared) vs resolvers (daemon)
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- [ ] Move/split `ts/plugins.ts` - interfaces to shared, loaders to daemon Move/split `ts/plugins.ts` - interfaces to shared, loaders to daemon
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### Phase 5: Rename Classes
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- [x] In `processmanager.ts`: Rename class `Tspm` → `ProcessManager`
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- [x] Update all references to `Tspm` class to use `ProcessManager`
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- [x] Update constructor in `tspm.daemon.ts` to use `ProcessManager` Update constructor in `tspm.daemon.ts` to use `ProcessManager`
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### Phase 6: Update Imports - Daemon Files
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- [x] Update imports in `ts/daemon/index.ts`
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- [x] Update imports in `ts/daemon/tspm.daemon.ts`
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- [x] Change `'./classes.tspm.js'` → `'./processmanager.js'`
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- [x] Change `'./paths.js'` → appropriate shared/daemon path
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- [x] Change `'./ipc.types.js'` → `'../shared/protocol/ipc.types.js'`
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- [x] Update imports in `ts/daemon/processmanager.ts`
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- [x] Change `'./classes.processmonitor.js'` → `'./processmonitor.js'`
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- [x] Change `'./classes.processwrapper.js'` → `'./processwrapper.js'`
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- [x] Change `'./classes.config.js'` → `'./tspm.config.js'`
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- [x] Change `'./utils.errorhandler.js'` → `'../shared/common/utils.errorhandler.js'`
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- [x] Update imports in `ts/daemon/processmonitor.ts`
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- [x] Change `'./classes.processwrapper.js'` → `'./processwrapper.js'`
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- [x] Update imports in `ts/daemon/processwrapper.ts`
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- [x] Update imports in `ts/daemon/tspm.config.ts` Change `'./utils.errorhandler.js'` → `'../shared/common/utils.errorhandler.js'`
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- [ ] Update imports in `ts/daemon/processmonitor.ts`
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- [ ] Change `'./classes.processwrapper.js'` → `'./processwrapper.js'`
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- [ ] Update imports in `ts/daemon/processwrapper.ts`
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- [ ] Update imports in `ts/daemon/tspm.config.ts`
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### Phase 7: Update Imports - Client Files
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- [x] Update imports in `ts/client/tspm.ipcclient.ts`
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- [x] Change `'./paths.js'` → appropriate shared/daemon path
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- [x] Change `'./ipc.types.js'` → `'../shared/protocol/ipc.types.js'`
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- [x] Update imports in `ts/client/tspm.servicemanager.ts`
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- [x] Change `'./paths.js'` → appropriate shared/daemon path
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- [x] Create exports in `ts/client/index.ts`
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- [x] Export TspmIpcClient
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- [x] Export TspmServiceManager Create exports in `ts/client/index.ts`
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- [ ] Export TspmIpcClient
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- [ ] Export TspmServiceManager
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### Phase 8: Update Imports - CLI Files
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- [x] Update imports in `ts/cli/index.ts`
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- [x] Change `'../utils.errorhandler.js'` → `'../shared/common/utils.errorhandler.js'`
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- [x] Update imports in `ts/cli/commands/service/enable.ts`
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- [x] Change `'../../../classes.servicemanager.js'` → `'../../../client/tspm.servicemanager.js'`
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- [x] Update imports in `ts/cli/commands/service/disable.ts`
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- [x] Change `'../../../classes.servicemanager.js'` → `'../../../client/tspm.servicemanager.js'`
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- [x] Update imports in `ts/cli/commands/daemon/index.ts`
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- [x] Change `'../../../classes.daemon.js'` → `'../../../daemon/tspm.daemon.js'`
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- [x] Change `'../../../classes.ipcclient.js'` → `'../../../client/tspm.ipcclient.js'`
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- [x] Update imports in `ts/cli/commands/process/*.ts` files
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- [x] Change all `'../../../classes.ipcclient.js'` → `'../../../client/tspm.ipcclient.js'`
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- [x] Change all `'../../../classes.tspm.js'` → `'../../../shared/protocol/ipc.types.js'` (for types)
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- [x] Update imports in `ts/cli/registration/index.ts`
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- [x] Change `'../../classes.ipcclient.js'` → `'../../client/tspm.ipcclient.js'` Change all `'../../../classes.ipcclient.js'` → `'../../../client/tspm.ipcclient.js'`
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- [ ] Change all `'../../../classes.tspm.js'` → `'../../../shared/protocol/ipc.types.js'` (for types)
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- [ ] Update imports in `ts/cli/registration/index.ts`
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- [ ] Change `'../../classes.ipcclient.js'` → `'../../client/tspm.ipcclient.js'`
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### Phase 9: Update Main Exports
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- [x] Update `ts/index.ts`
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- [x] Remove `export * from './classes.tspm.js'`
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- [x] Remove `export * from './classes.processmonitor.js'`
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- [x] Remove `export * from './classes.processwrapper.js'`
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- [x] Remove `export * from './classes.daemon.js'`
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- [x] Remove `export * from './classes.ipcclient.js'`
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- [x] Remove `export * from './classes.servicemanager.js'`
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- [x] Add `export * from './client/index.js'`
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- [x] Add `export * from './shared/protocol/ipc.types.js'`
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- [x] Add `export { startDaemon } from './daemon/index.js'` Add `export * from './shared/protocol/ipc.types.js'`
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- [ ] Add `export { startDaemon } from './daemon/index.js'`
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### Phase 10: Update Package.json
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- [ ] Add exports map to package.json:
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```json
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"exports": {
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".": "./dist_ts/client/index.js",
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"./client": "./dist_ts/client/index.js",
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"./daemon": "./dist_ts/daemon/index.js",
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"./protocol": "./dist_ts/shared/protocol/ipc.types.js"
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}
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```
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### Phase 11: Testing
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- [x] Run `pnpm run build` and fix any compilation errors
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- [x] Test daemon startup: `./cli.js daemon start` (fixed with smartipc 2.1.3)
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- [x] Test process management: `./cli.js start "echo test"`
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- [x] Test client commands: `./cli.js list`
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- [ ] Run existing tests: `pnpm test`
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- [ ] Update test imports if needed Update test imports if needed
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### Phase 12: Documentation
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- [ ] Update README.md if needed
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- [ ] Document the new architecture in a comment at top of ts/index.ts
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- [ ] Add comments explaining the separation in each index.ts file
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### Phase 13: Cleanup
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- [ ] Delete empty directories from old structure
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- [ ] Verify no broken imports remain
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- [ ] Run linter and fix any issues
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- [ ] Commit with message: "refactor(architecture): reorganize into daemon/client/shared structure"
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## Benefits After Completion
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### Immediate Benefits
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- **Clear separation**: Instantly obvious what runs where (daemon vs client)
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- **Smaller client bundles**: Client code won't accidentally include ProcessMonitor, ProcessWrapper, etc.
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- **Better testing**: Can test client and daemon independently
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- **Cleaner imports**: No more confusing `classes.` prefix on everything
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### Architecture Benefits
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- **Enforced boundaries**: TypeScript project references prevent cross-imports
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- **Protocol as contract**: Client and daemon can evolve independently
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- **Version compatibility**: Protocol versioning allows client/daemon version skew
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- **Security**: Internal daemon errors don't leak to clients over IPC
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### Future Benefits
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- **Browser support**: Clean client could potentially work in browser
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- **Embedded mode**: Could add option to run ProcessManager in-process
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- **Plugin system**: Clear boundary for plugin interfaces vs implementation
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- **Multi-language clients**: Other languages only need to implement IPC protocol
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## Current Status (2025-08-28)
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### ✅ REFACTORING COMPLETE!
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The TSPM architecture refactoring has been successfully completed with all planned features implemented and tested.
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### What Was Accomplished
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#### Architecture Reorganization ✅
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- Successfully moved all files into the new daemon/client/shared structure
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- Clear separation between process management (daemon) and IPC communication (client)
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- Minimal shared code with only protocol types and common utilities
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#### Code Updates ✅
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- Renamed `Tspm` class to `ProcessManager` for better clarity
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- Updated all imports across the codebase to use new paths
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- Consolidated types in `ts/shared/protocol/ipc.types.ts`
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- Updated main exports to reflect new structure
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#### Testing & Verification ✅
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- Project compiles with no TypeScript errors
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- Daemon starts and runs successfully (after smartipc 2.1.3 update)
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- CLI commands work properly (`list`, `start`, etc.)
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- Process management functionality verified
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### Architecture Benefits Achieved
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1. **Clear Boundaries**: Instantly obvious what code runs in daemon vs client
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2. **Smaller Bundles**: Client code can't accidentally include daemon internals
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3. **Protocol as Contract**: Client and daemon communicate only through IPC types
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4. **Better Testing**: Components can be tested independently
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5. **Future-Proof**: Ready for multi-language clients, browser support, etc.
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### Next Steps (Future Enhancements)
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1. Add package.json exports map for controlled public API
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2. Implement TypeScript project references for enforced boundaries
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3. Split `ts/paths.ts` into shared constants and daemon-specific resolvers
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4. Move plugin interfaces to shared, keep loaders in daemon
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5. Update documentation
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## Implementation Safeguards (from GPT-5 Review)
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### Boundary Enforcement
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- **TypeScript project references**: Separate tsconfig files prevent illegal imports
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- **ESLint rules**: Use `import/no-restricted-paths` to catch violations
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- **Package.json exports**: Control what external consumers can import
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### Keep Shared Minimal
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- **No Node.js APIs**: No fs, net, child_process in shared
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- **No environment access**: No process.env, no OS-specific code
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- **Pure functions only**: Shared utilities must be environment-agnostic
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- **Protocol-focused**: Mainly type definitions and constants
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### Prevent Environment Bleed
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- **Split paths.ts**: Constants (shared) vs OS-specific resolution (daemon)
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- **Plugin interfaces only**: Loading/discovery stays in daemon
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- **No dynamic imports**: Keep shared statically analyzable
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### Future-Proofing
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- **Protocol versioning**: Add version field for compatibility
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- **Error codes**: Standardized errors instead of string messages
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- **Capability negotiation**: Client can query daemon capabilities
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- **Subpath exports**: Different entry points for different use cases |