feat(core): Integrate Rolldown as optional bundler, migrate filesystem to smartfs, and update bundler/tooling

readme.plan.md

@@ -3,9 +3,11 @@
 **Command to reread CLAUDE.md**: `cat ~/.claude/CLAUDE.md`
 
 ## Objective
+
 Add Rolldown as an optional bundler to tsbundle while keeping esbuild as the default bundler. This allows users to experiment with Rolldown using `--bundler=rolldown` flag.
 
 ## Current State
+
 - tsbundle currently only uses esbuild despite having interfaces for multiple bundlers
 - The bundler selection logic exists but always returns esbuild
 - mod_rollup and mod_parcel directories exist but are empty
@@ -14,23 +16,26 @@ Add Rolldown as an optional bundler to tsbundle while keeping esbuild as the def
 ## Implementation Tasks
 
 ### Phase 1: Core Infrastructure
+
 - [x] Update `ts/interfaces/index.ts` to include 'rolldown' in bundler union type
 - [x] Fix `getBundlerPath()` in `ts/tsbundle.class.tsbundle.ts` to properly route bundlers
 - [x] Remove hardcoded `bundler: 'esbuild'` from transportOptions (line 26)
 - [x] Add rolldown dependency to package.json: `"rolldown": "^1.0.0-beta.18"`
 
 ### Phase 2: CLI Support
+
 - [x] Check if `ts/tsbundle.cli.ts` already parses --bundler option
 - [x] Ensure default bundler is 'esbuild' when not specified
 - [x] Verify CLI passes bundler option correctly to TsBundle class
 
 ### Phase 3: Rolldown Module Implementation
+
 - [x] Create `ts/mod_rolldown/` directory
 - [x] Create `ts/mod_rolldown/plugins.ts`:
   ```typescript
   export * from '../plugins.js';
   import { rolldown } from 'rolldown';
-  export { rolldown }
+  export { rolldown };
   ```
 - [x] Create `ts/mod_rolldown/index.child.ts` with:
   - TsBundleProcess class
@@ -40,6 +45,7 @@ Add Rolldown as an optional bundler to tsbundle while keeping esbuild as the def
   - run() function to read transportOptions and execute
 
 ### Phase 4: Feature Parity
+
 - [x] Implement TypeScript compilation via rolldown
 - [x] Ensure source map generation works
 - [x] Support tsconfig path aliases
@@ -48,6 +54,7 @@ Add Rolldown as an optional bundler to tsbundle while keeping esbuild as the def
 - [x] Handle bundle: true behavior
 
 ### Phase 5: Testing
+
 - [x] Test default behavior (should use esbuild)
 - [x] Test `--bundler=esbuild` explicit selection
 - [x] Test `--bundler=rolldown` selection
@@ -57,19 +64,21 @@ Add Rolldown as an optional bundler to tsbundle while keeping esbuild as the def
 ## Technical Specifications
 
 ### Rolldown Configuration Mapping
-| esbuild option | rolldown equivalent |
-|----------------|-------------------|
-| bundle: true | bundle: true |
-| sourcemap: true | sourcemap: true |
-| format: 'esm' | format: 'es' |
+
+| esbuild option   | rolldown equivalent                 |
+| ---------------- | ----------------------------------- |
+| bundle: true     | bundle: true                        |
+| sourcemap: true  | sourcemap: true                     |
+| format: 'esm'    | format: 'es'                        |
 | target: 'es2022' | (use default, no direct equivalent) |
-| minify: true | minify: true |
-| entryPoints | input |
-| outfile | output.file |
-| tsconfig | resolve.tsconfigFilename |
-| alias | resolve.alias |
+| minify: true     | minify: true                        |
+| entryPoints      | input                               |
+| outfile          | output.file                         |
+| tsconfig         | resolve.tsconfigFilename            |
+| alias            | resolve.alias                       |
 
 ### CLI Usage
+
 ```bash
 # Default (uses esbuild)
 tsbundle
@@ -82,12 +91,14 @@ tsbundle --production --bundler=rolldown
 ```
 
 ## Risks and Mitigation
+
 1. **Rolldown is beta** - Keep esbuild as default, mark rolldown as experimental
 2. **API differences** - Abstract common interface, handle bundler-specific logic
 3. **Missing features** - Document any limitations in README
 4. **Breaking changes** - None, as esbuild remains default
 
 ## Success Criteria
+
 - [x] Can build with esbuild (default behavior unchanged)
 - [x] Can build with rolldown via --bundler flag
 - [x] Both bundlers produce working ESM output
@@ -96,9 +107,11 @@ tsbundle --production --bundler=rolldown
 - [ ] All existing tests pass
 
 ## Implementation Status
+
 ✅ **COMPLETED** - Rolldown has been successfully integrated as an optional bundler.
 
 ### Test Results:
+
 - esbuild (default): Working correctly, 2.2K minified
 - rolldown: Working correctly, 1.5K minified (better compression!)
 - Both bundlers support all required features
@@ -106,7 +119,8 @@ tsbundle --production --bundler=rolldown
 - Production and test modes work for both
 
 ## Future Considerations
+
 - Once Rolldown reaches v1.0.0 stable, consider making it default
 - Implement rollup and parcel modules using same pattern
 - Add performance benchmarks comparing bundlers
-- Consider adding --watch mode support
+- Consider adding --watch mode support