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Quick Wins Implementation - Complete!

Summary

Successfully implemented Phase 1 "Quick Wins" features from the FontLab API roadmap. These provide immediate high-value functionality for working with fonts through the MCP server.

New Resources (Read-only)

Glyph Search & Discovery

  • fontlab://glyphs/by-unicode/{codepoint} - Find glyph by Unicode (decimal or hex with 0x prefix)
  • fontlab://glyphs/search?pattern={pattern} - Search glyphs by name pattern (supports * and ? wildcards)

Metadata

  • fontlab://glyph/{name}/metadata - Get glyph metadata (tags, note, mark color)

Kerning

  • fontlab://font/kerning - Get all kerning pairs in the font

Total New Resources: 4

New Tools (Write operations)

Glyph Management

  1. rename_glyph - Rename an existing glyph

    • Parameters: old_name, new_name
    • Validates name doesn't already exist

  2. duplicate_glyph - Duplicate a glyph with a new name

    • Parameters: name, new_name
    • Clones all glyph data including outlines

Metrics & Spacing

  1. set_glyph_sidebearings - Set left and/or right sidebearings
    • Parameters: name, lsb (optional), rsb (optional)
    • Provides precise control over glyph spacing

Metadata Management

  1. set_glyph_note - Set note text for a glyph

    • Parameters: name, note
    • Supports up to 10,000 characters

  2. set_glyph_tags - Set tags for organization

    • Parameters: name, tags (array of strings)
    • Empty array clears all tags

  3. set_glyph_mark - Set color mark for visual organization

    • Parameters: name, mark (0-255)
    • 0 = no mark, 1-255 = color index

Kerning

  1. set_kerning_pair - Set kerning value between two glyphs

    • Parameters: left, right, value
    • Value of 0 removes kerning

  2. remove_kerning_pair - Explicitly remove kerning pair

    • Parameters: left, right
    • Removes kerning entry entirely

Total New Tools: 8

Bridge Methods Added

Added to fontlab_bridge.py:

  • find_glyph_by_unicode(codepoint) - Unicode-based glyph lookup
  • search_glyphs(pattern) - Wildcard pattern matching using fnmatch
  • get_glyph_metadata(glyph_name) - Tags, notes, marks
  • get_kerning() - All kerning pairs via fontgate

Implementation Details

Security & Validation

  • All inputs validated using existing validation utilities
  • Glyph names checked for dangerous characters
  • Unicode code points validated (0-0x10FFFF, excluding surrogates)
  • Numeric ranges enforced for metrics and kerning
  • String length limits for notes (10K) and tags (255)

Error Handling

  • Comprehensive try/catch in all bridge scripts
  • Validation errors logged and returned to user
  • Font existence checks
  • Glyph existence checks
  • Duplicate name prevention

FontLab API Usage

  • Uses flWorkspace.instance().currentFont() pattern
  • Leverages fnmatch for pattern matching (built-in Python module)
  • Accesses font.fgFont.kerning for kerning operations
  • Uses glyph.clone() for duplication
  • Calls glyph.update() and font.update() for persistence

Coverage Increase

Before:

  • 6 tools + 4 resources
  • ~10% of FontLab API

After:

  • 14 tools + 8 resources
  • ~15-20% of FontLab API

Added:

  • Glyph search & filtering capabilities
  • Complete metadata management
  • Basic sidebearing control
  • Kerning pair management
  • Glyph rename/duplicate operations

Use Cases Enabled

  1. LLM-Assisted Font Design

    • Search for glyphs by pattern (e.g., "all glyphs starting with A*")
    • Find glyphs by Unicode for character set validation
    • Organize glyphs with tags and notes

  2. Typography Automation

    • Programmatic kerning adjustments
    • Batch glyph operations via search
    • Metadata-driven workflows

  3. Font Production

    • Duplicate base glyphs for variants
    • Rename glyphs to match naming conventions
    • Track work-in-progress with marks and notes

  4. Quality Assurance

    • Search for problematic glyphs by pattern
    • Validate Unicode assignments
    • Review kerning coverage

Next Steps

Ready to implement Phase 1 remaining features:

  • Contour & shape manipulation (~15 tools)
  • Components (~5 tools)
  • Advanced glyph operations (remaining items)

Or move to Phase 2:

  • OpenType features
  • Variable fonts
  • Font validation

Files Modified

  1. src/resources.py

    • Added 4 new resource definitions
    • Added URI handlers for glyph search, metadata, and kerning

  2. src/fontlab_bridge.py

    • Added 4 new bridge methods with FontLab Python scripts
    • Enhanced logging for timeout handling

  3. src/tools.py

    • Added 8 new tool definitions
    • Added 8 new tool handlers
    • Implemented 8 complete tool functions with validation

  4. src/utils/validation.py (existing)

    • Used existing validation infrastructure

Testing Notes

To test these features, you'll need:

  1. FontLab 7 or 8 installed
  2. A font open in FontLab
  3. The MCP server running and connected

Test scenarios:

  • Search for glyphs: fontlab://glyphs/search?pattern=A*
  • Find by unicode: fontlab://glyphs/by-unicode/65 (should find "A")
  • Rename a glyph
  • Duplicate a glyph
  • Set kerning pairs
  • Add tags and notes

Status: ✅ Implementation Complete - Ready for Testing