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Add mojo-yaml v0.1.2 #200

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@Mjboothaus Mjboothaus commented Jan 27, 2026 •
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Adds mojo-yaml v0.1.2 - YAML Lite parser for Mojo covering ~80% of common YAML patterns.

Version update: v0.1.1 → v0.1.2 includes pre-commit whitespace fixes.

First submission following the modular-community standards guide.

Package features:

  • Native YAML configuration file parsing with zero Python dependencies
  • Nested mappings and sequences (any depth)
  • Inline list-mappings pattern (- name: value\n key2: value2)
  • All scalar types (int, float, bool, null, string)
  • Comments anywhere in files
  • Mixed structures (lists in dicts, dicts in lists)
  • Type-safe value access (as_string(), as_int(), as_bool())
  • 91/91 tests passing (100% test coverage)
  • Works with real configuration files (pre-commit configs, custom YAMLs)
  • Performance: 9-21x faster than Python's pyyaml
  • Comprehensive benchmarks comparing to Python baseline

Limitations:

  • Multi-word strings require quotes ("Hello world" not Hello world)
  • Flow-style syntax not supported (use block style instead)
  • Reader-only in v0.1.x (YAML writer planned for future releases)

Use case: Perfect for configuration files, CI/CD pipelines, build systems, and any Mojo application needing YAML configuration support. Covers ~80% of common YAML usage patterns.

Compliance checklist:

  • ✅ Package image (157KB PNG) for builds.modular.com
  • ✅ CodeQL scanning enabled
  • ✅ CodeQL badge in README
  • ✅ Apache-2.0 license
  • ✅ Git tag v0.1.2 exists
  • ✅ recipe.yaml with proper structure
  • ✅ test_package.mojo validates core functionality
  • ✅ Comprehensive README and documentation
  • ✅ Performance benchmarks included

Repository: https://github.com/DataBooth/mojo-yaml
CodeQL: CodeQL

Mjboothaus and others added 3 commits January 27, 2026 17:31
@Mjboothaus
Add mojo-yaml v0.1.1 - YAML Lite parser for Mojo
37efe59 
First submission following modular-community standards:
- Package image included for builds.modular.com
- CodeQL scanning enabled in repository
- Recipe with proper structure and metadata
- Test package validates core functionality

mojo-yaml provides YAML Lite parsing covering ~80% of common patterns,
with 91/91 tests passing and 9-21x better performance than Python's pyyaml.
@Mjboothaus @warp-agent
Fix trailing whitespace in mojo-yaml test_package.mojo
2adfb33 
Remove trailing spaces from blank lines to pass pre-commit checks.

Co-Authored-By: Warp <agent@warp.dev>
@Mjboothaus @warp-agent
Update mojo-yaml to v0.1.2
b588034 
Version bump includes whitespace fixes from pre-commit.

Co-Authored-By: Warp <agent@warp.dev>
@Mjboothaus Mjboothaus changed the title Add mojo-yaml v0.1.1 Add mojo-yaml v0.1.2 Jan 28, 2026
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