ruby-bindings

name	ruby-bindings
description	Magnus Ruby bindings for Kailash Rust — block-based lifecycle, GVL release, gem packaging.

Ruby Bindings — Quick Reference

Magnus-based binding distributed as kailash gem. Uses block-based resource lifecycle with GVL release for concurrent execution.

Key Facts

Item	Value
Gem name	kailash
Require	require 'kailash'
Rust crate	bindings/kailash-ruby/
FFI framework	Magnus 0.8 / rb-sys >=0.9.113,<0.9.121
Library type	cdylib (.bundle on macOS, .so on Linux)

Known Issue (PR #349): rb-sys must be pinned to >=0.9.113,<0.9.121 in bindings/kailash-ruby/Cargo.toml. Versions 0.9.121+ introduced a breaking change. Both [dependencies] and [build-dependencies] entries carry this pin with the stable-api feature.

Block-Based Lifecycle

Ruby binding uses block-based resource management (no manual close):

require 'kailash'

Kailash::Registry.open do |reg|
  builder = Kailash::WorkflowBuilder.new
  builder.add_node("NoOpNode", "n1", {})
  wf = builder.build(reg)

  Kailash::Runtime.open(reg) do |rt|
    result = rt.execute(wf, {})
    puts result.results
  end
end

GVL Strategy

• Workflow executor runs without the GVL (without_gvl)
• Callback nodes reacquire the GVL (with_gvl) to call Ruby blocks
• This allows concurrent workflow execution alongside Ruby threads

Registered Modules

Module	Key Classes
Kailash::Registry	Node registry with open block
Kailash::WorkflowBuilder	DAG builder
Kailash::Runtime	Execution engine with open block
Kailash::Value	Value mapping (Rust <-> Ruby)
Kailash::AuditLog	Hash-chained audit log, AuditEntry, AuditEventType
Kailash::InMemoryEventBus	Pub/sub domain event bus, DomainEvent
Kailash::TracingConfig	OpenTelemetry tracing, ExporterType, TelemetryMetrics

v3.9.0 Binding Modules

audit_log (314 lines)

Wraps kailash-core::audit_log. Immutable, hash-chained audit log with chain verification.

Ruby class	Purpose
Kailash::AuditEventType	Event classification (standard types + custom())
Kailash::AuditEntry	Single chain entry (id, event_type, actor, timestamp, hash)
Kailash::AuditLog	Append-only log: append(), entries(), verify_chain()
Kailash::ChainVerificationResult	Verification outcome with valid? and errors

Source: bindings/kailash-ruby/ext/kailash/src/audit_log.rs

event_bus (154 lines)

Wraps kailash-core::event_bus. In-memory pub/sub for domain events.

Ruby class	Purpose
Kailash::DomainEvent	Structured event (id, event_type, topic, actor, payload)
Kailash::InMemoryEventBus	Publish/subscribe: publish(), subscribe(), drain()

Source: bindings/kailash-ruby/ext/kailash/src/event_bus.rs

telemetry (262 lines)

Wraps kailash-core::telemetry. OpenTelemetry configuration and atomic metrics counters.

Ruby class	Purpose
Kailash::ExporterType	Protocol selection: otlp, jaeger, stdout
Kailash::TracingConfig	OTLP config: endpoint, service name, sample ratio, exporter
Kailash::TelemetryMetrics	Atomic counters: increment(), get(), reset(), all()

Source: bindings/kailash-ruby/ext/kailash/src/telemetry.rs

convergence (platform-architecture-convergence)

Cross-cutting SPEC types under Kailash::Convergence. 7 types wrapping EATP posture, auth, provider capabilities, and audit primitives.

Ruby class	Rust source type	SPEC
Kailash::Convergence::PostureLevel	eatp::types::PostureLevel	SPEC-07
Kailash::Convergence::AgentPosture	kailash_kaizen::AgentPosture	SPEC-07
Kailash::Convergence::EatpJwtClaims	eatp::types::EatpJwtClaims	SPEC-06
Kailash::Convergence::ProviderCapability	kailash_kaizen::ProviderCapability	SPEC-01
Kailash::Convergence::AuditOutcome	kailash_enterprise::AuditOutcome	SPEC-08
Kailash::Convergence::AuditActor	kailash_enterprise::AuditActor	SPEC-08
Kailash::Convergence::AuditResource	kailash_enterprise::AuditResource	SPEC-08

Source: bindings/kailash-ruby/ext/kailash/src/convergence.rs

Skill Files

File	Content
ruby-quickstart.md	Getting started guide
ruby-cheatsheet.md	Common patterns + Ruby idiom cheatsheet
ruby-common-mistakes.md	Pitfalls and fixes
ruby-custom-nodes.md	Callback node patterns
ruby-framework-bindings.md	Framework Ruby API
ruby-gold-standards.md	Binding quality rules
ruby-available-nodes.md	Node list for Ruby
ruby-nexus-rack.md	Nexus server + Rack integration in Ruby
ruby-mcp.md	MCP server/client patterns in Ruby
ruby-dataflow.md	DataFlow CRUD + models in Ruby
ruby-kaizen.md	Kaizen agents, signatures, delegates
ruby-deployment.md	Gem build, packaging, codesign, release
ruby-eatp-trust.md	EATP trust posture + governance in Ruby
ruby-schema-migration.md	Schema migration patterns in Ruby

Related

• dataflow-specialist / nexus-specialist agents — framework Ruby API guidance
• pattern-expert agent — debugging Magnus / FFI errors and idiom patterns
• gold-standards-validator agent — Ruby binding compliance validation