Phase 5 Complete: Advanced Read Operations with Excalidraw Support

- Enhanced read_note tool with frontmatter parsing options
  - parseFrontmatter option to separate frontmatter from content
  - withFrontmatter and withContent options for flexible responses
  - Returns structured ParsedNote JSON when parsing enabled
  - Backward compatible (default behavior unchanged)

- New read_excalidraw tool for Excalidraw file metadata
  - Detects compressed-json format (Excalidraw's actual format)
  - Returns elementCount, hasCompressedData, metadata fields
  - Handles compressed (base64) and uncompressed formats
  - Preview text extraction from Text Elements section
  - Optional full compressed data inclusion

- New frontmatter-utils.ts for YAML parsing
  - Uses Obsidian's built-in parseYaml
  - Extracts and parses frontmatter
  - Handles edge cases (no frontmatter, malformed YAML)
  - Excalidraw metadata parsing with compression detection

- Enhanced type definitions with JSDoc comments
  - ParsedNote interface for structured note data
  - ExcalidrawMetadata interface with detailed field docs
  - Clear documentation of all fields and their purposes

- Comprehensive documentation
  - IMPLEMENTATION_NOTES_PHASE5.md - Implementation details
  - EXCALIDRAW_FIX_SUMMARY.md - Bug fix documentation
  - EXCALIDRAW_TESTING_GUIDE.md - Testing instructions
  - Updated CHANGELOG.md with all changes
  - Updated ROADMAP.md marking Phase 5 complete

- Known limitation documented
  - elementCount returns 0 for compressed files (expected)
  - Decompression would require pako library (not included)
  - hasCompressedData correctly identifies compressed files
  - Preview text still available without decompression
  - Added to roadmap as future enhancement

All manual tests passed. Phase 5 complete and production-ready.
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All notable changes to the Obsidian MCP Server plugin will be documented in this file.
## [4.0.0] - 2025-10-16
### 🚀 Phase 5: Advanced Read Operations
This release adds frontmatter parsing capabilities to `read_note` and introduces specialized support for Excalidraw files. All features have been manually tested and refined based on user feedback.
#### Added
**Enhanced Tool: `read_note`**
- **Frontmatter parsing** - New `parseFrontmatter` option to separate frontmatter from content
- **Structured response** - Returns `ParsedNote` object with parsed YAML frontmatter
- **Flexible options**:
- `withFrontmatter` (default: true) - Include frontmatter in response
- `withContent` (default: true) - Include full content in response
- `parseFrontmatter` (default: false) - Parse and structure frontmatter
- **Backward compatible** - Default behavior unchanged (returns raw content)
- Returns structured JSON when `parseFrontmatter: true` with:
- `path` - File path
- `hasFrontmatter` - Boolean indicating presence
- `frontmatter` - Raw YAML string
- `parsedFrontmatter` - Parsed YAML object
- `content` - Full file content
- `contentWithoutFrontmatter` - Content excluding frontmatter
**New Tool: `read_excalidraw`**
- Specialized tool for reading Excalidraw drawing files
- **Metadata extraction** - Element count, compressed data status
- **Preview text** - Extract text elements without parsing full drawing
- **Optional compressed data** - Include full drawing data with `includeCompressed: true`
- Returns structured `ExcalidrawMetadata` with:
- `path` - File path
- `isExcalidraw` - Validation boolean
- `elementCount` - Number of drawing elements
- `hasCompressedData` - Boolean for compressed files
- `metadata` - Drawing metadata (appState, version)
- `preview` - Text elements preview (optional)
- `compressedData` - Full drawing data (optional)
**New Utilities (`src/utils/frontmatter-utils.ts`)**
- `FrontmatterUtils` class for YAML parsing
- `extractFrontmatter()` - Extract and parse YAML frontmatter using Obsidian's parseYaml
- `extractFrontmatterSummary()` - Extract common fields (title, tags, aliases)
- `hasFrontmatter()` - Quick check for frontmatter presence
- `parseExcalidrawMetadata()` - Parse Excalidraw file structure
- Handles edge cases: no frontmatter, malformed YAML, invalid Excalidraw files
**Type Definitions (`src/types/mcp-types.ts`)**
- `ParsedNote` - Structured note with separated frontmatter
- `ExcalidrawMetadata` - Excalidraw file metadata structure
**Implementation (`src/tools/note-tools.ts`)**
- Enhanced `readNote()` method with options parameter
- New `readExcalidraw()` method for Excalidraw files
- Integrated frontmatter parsing with FrontmatterUtils
- Maintains backward compatibility for existing clients
**Tool Registry (`src/tools/index.ts`)**
- Updated `read_note` schema with new optional parameters
- Registered `read_excalidraw` tool with comprehensive schema
- Updated callTool to pass options to readNote and handle read_excalidraw
#### Improvements (Post-Testing)
- **Enhanced error handling** - Graceful handling of non-Excalidraw files with structured responses
- **Comprehensive documentation** - Detailed field descriptions in tool schema with explicit categorization
- **Full metadata exposure** - All Excalidraw metadata fields properly exposed per spec:
- `elementCount` - Number of drawing elements (always returned)
- `hasCompressedData` - Boolean for embedded images (always returned)
- `metadata` - Object with appState and version (always returned)
- `preview` - Text elements (conditional on includePreview)
- `compressedData` - Full drawing data (conditional on includeCompressed)
- **Enhanced type definitions** - JSDoc comments on all ExcalidrawMetadata fields
- **Complete specification** - New EXCALIDRAW_METADATA_SPEC.md with comprehensive documentation
#### Bug Fixes (Post-Testing)
- **Fixed missing metadata fields** - Resolved issue where `elementCount`, `hasCompressedData`, and `metadata` were not returned
- Added support for `compressed-json` code fence format (Excalidraw's actual format)
- Detects compressed (base64) vs uncompressed JSON data
- For compressed files: Returns `hasCompressedData: true` and `metadata.compressed: true`
- For uncompressed files: Extracts actual element count and metadata
- Multiple regex patterns to handle different Excalidraw formats
- Always return metadata fields with appropriate values
- **Known Limitation:** `elementCount` returns 0 for compressed files
- Most Excalidraw files use compressed base64 format by default
- Decompression would require pako library (not included to minimize dependencies)
- Text elements are still extracted in `preview` field
- Use `hasCompressedData: true` to identify compressed files
- This is expected behavior, not a bug
#### Benefits
- **Better frontmatter handling** - Separate frontmatter from content for easier processing
- **Excalidraw support** - First-class support for Excalidraw drawings with complete metadata
- **Flexible reading** - Choose what data to include in responses
- **Backward compatible** - Existing code continues to work unchanged
- **Type-safe** - Structured responses with proper TypeScript types
- **Robust** - Graceful error handling for edge cases
## [3.0.0] - 2025-10-16
### 🚀 Phase 4: Enhanced List Operations