StructuredMerge Ruby provides Ruby gems for building merge-aware tools that need portable structured-merge contracts, fixture-backed behavior, and Ruby-native integration points.

The monorepo includes the core AST/review contracts, parser substrate support, format-specific merge gems, binary/ZIP planning helpers, provider adapters, and a Ruby packaging recipe gem.

Project links:

• Website: https://structuredmerge.org
• Implementations: https://structuredmerge.org/implementations.html
• Specification: https://github.com/structuredmerge/structuredmerge-spec
• Shared fixtures: https://github.com/structuredmerge/structuredmerge-fixtures

Install the gems your tool needs:

bundle add ast-merge json-merge

Core:

• tree_haver - parser substrate, byte ranges, backend adapters, and binary tree contracts.
• ast-merge - AST merge contracts, diagnostics, planning, review, replay, and nested-merge vocabulary.
• ast-template - template/session transport contracts.

Format libraries:

• plain-merge
• json-merge
• yaml-merge
• toml-merge
• markdown-merge
• ruby-merge
• go-merge
• rust-merge
• typescript-merge
• binary-merge
• zip-merge

Provider and recipe gems:

• psych-merge
• citrus-toml-merge
• parslet-toml-merge
• commonmarker-merge
• kramdown-merge
• markly-merge
• prism-merge
• kettle-jem

The Ruby gems are developed against the shared StructuredMerge fixtures. Those fixtures define the cross-language behavior expected from the Go, TypeScript, Rust, and Ruby implementations. Conformance checks live in gem specs and in the shared spec/fixture tooling rather than in a static launch-status document.

Common checks:

• mise run check
• bundle exec rake
• package-specific bundle exec rspec commands

Bundler path gems are the default isolation mechanism inside this monorepo. When this repository needs to consume sibling workspace projects outside the monorepo itself, prefer nomono-driven Bundler wiring rather than manual Ruby load-path changes.