altar

# Implementation Plan

## Overview

This implementation plan converts the ALTAR protocol design into a series of discrete, manageable coding tasks that build incrementally toward a complete, production-ready system. Each task is designed to be executable by a coding agent with clear objectives and specific requirements references.

The plan follows a test-driven development approach, prioritizing core functionality first, then building out advanced features. All tasks focus exclusively on code implementation, testing, and integration activities.

## Implementation Tasks

- [ ] 1. Level 1 Core Protocol Foundation (Minimum Viable ALTAR)
  - Establish fundamental ALTAR protocol data structures using language-neutral IDL
  - Create the enhanced type system with recursive object support
  - Implement message serialization and validation for core compliance
  - Build Host-managed tool contract system for security
  - _Requirements: 1.1, 1.2, 1.6, 1.7, 2.1, 2.2, 3.1, 3.2, 4.1, 4.2, 4.3, 6.2, 6.3, 6.4, 6.5_

- [ ] 1.1 Define Enhanced Core Message Types Using Language-Neutral IDL
  - Create language-neutral IDL definitions for AnnounceRuntime message with runtime_id, language, version, well-known capabilities fields
  - Create FulfillTools message (replacing RegisterTools) with session_id, contract_names array, runtime_id fields for security
  - Create enhanced ToolCall message with client-generated invocation_id (for idempotency), correlation_id, session_id, namespaced tool_name, parameters, metadata fields
  - Create enhanced ToolResult message with invocation_id, correlation_id, status, payload, error_details, runtime_metadata fields
  - Create StreamChunk message with invocation_id, chunk_id, payload, is_final, error_details fields for in-band error reporting
  - Add GetAvailableContracts message for Runtime bootstrap discovery
  - Create RegisterTools message for Development Mode dynamic registration (with security warnings)
  - Add explicit NullValue enum to Value type to avoid null ambiguity
  - Generate language-specific bindings from IDL for Elixir, Python, Go, and Node.js
  - Write comprehensive unit tests for all message creation, serialization, field validation, and correlation ID propagation
  - _Requirements: 2.1, 2.2, 3.1, 3.2, 6.2, 7.6, 7.7, 12.5, 12.6, 13.1, 13.2, 13.3_

- [ ] 1.2 Implement Enhanced ALTAR Type System
  - Create language-neutral ParameterSchema IDL with primitive types (string, integer, float, boolean, binary)
  - Implement recursive complex types: array[T] where T can be any ALTAR type, and object[Schema] with property definitions
  - Create ToolContract IDL (replacing ToolDefinition) with name, description, parameters, return_type, security_requirements fields
  - Create ToolManifest IDL for Host-managed contract registry with version control
  - Implement recursive type validation functions for parameter checking against schemas
  - Add constraint validation support (min/max values, regex patterns, enum restrictions)
  - Write comprehensive unit tests for type validation, recursive schemas, and constraint enforcement
  - _Requirements: 4.1, 4.2, 4.3, 4.4, 4.5, 4.6_

- [ ] 1.3 Build Message Serialization System
  - Implement JSON serialization/deserialization for all ALTAR message types
  - Create Protocol Buffers schema definitions for high-performance scenarios
  - Implement binary serialization support with version compatibility
  - Create serialization format detection and automatic conversion
  - Write unit tests for serialization round-trip integrity and format compatibility
  - _Requirements: 1.1, 4.5_

- [ ] 2. Session Management Core
  - Implement session lifecycle management with TTL support
  - Create session isolation and state management
  - Build session cleanup and resource management
  - _Requirements: 2.3, 5.1, 5.2, 5.3, 5.4, 5.5_

- [ ] 2.1 Create Session Manager Module
  - Implement `ALTAR.SessionManager` GenServer with ETS-backed session storage
  - Create `create_session/1` function with unique ID generation and TTL configuration
  - Implement `get_session/1`, `destroy_session/1`, and `list_sessions/0` functions
  - Add automatic session cleanup with configurable TTL and background cleanup process
  - Write unit tests for session lifecycle, TTL expiration, and concurrent access
  - _Requirements: 5.1, 5.2, 5.3, 5.4_

- [ ] 2.2 Implement Session Data Model
  - Create `ALTAR.Types.Session` struct with id, created_at, last_accessed, ttl_seconds, metadata fields
  - Add registered_tools, active_invocations, runtime_connections tracking
  - Implement session state validation and integrity checking
  - Create session metadata management with arbitrary key-value support
  - Write unit tests for session data model operations and state transitions
  - _Requirements: 2.3, 5.5_

- [ ] 2.3 Build Session Security Context
  - Create `ALTAR.Types.SecurityContext` struct for session-level security
  - Implement session-based access control with runtime authentication
  - Add security metadata tracking and audit logging
  - Create session isolation enforcement mechanisms
  - Write unit tests for security context validation and access control
  - _Requirements: 10.1, 10.2, 10.4_

- [ ] 3. Enhanced Tool Contract Management with Developer Experience
  - Create Host-managed tool contract registry with security-first design and dual-mode support
  - Implement tool contract fulfillment system replacing direct registration
  - Build Runtime bootstrap discovery system for available contracts
  - Add Development Mode for rapid iteration with security warnings
  - Build tool namespacing with runtime_id prefixes to prevent collisions
  - Implement contract validation against Host-trusted schemas
  - _Requirements: 2.4, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 12.1, 12.2, 12.3, 12.4, 12.5, 12.6, 12.7_

- [ ] 3.1 Implement Enhanced Host-Managed Tool Contract Registry
  - Create `ALTAR.ToolContractManager` GenServer with Host-controlled contract storage and dual-mode support
  - Implement `load_manifest/1` function for loading trusted tool contracts from Host configuration
  - Create `get_available_contracts/1` function for Runtime bootstrap discovery of fulfillable contracts
  - Create `fulfill_tools/3` function replacing `register_tools` for security (Runtime declares fulfillment, not definition)
  - Add `register_tools/3` function for Development Mode dynamic registration with security warnings
  - Implement `set_host_mode/2` function for switching between STRICT (production) and DEVELOPMENT modes
  - Implement automatic tool namespacing with runtime_id prefixes (e.g., "python-worker-1/calculate_metrics")
  - Add contract validation using Host-trusted schemas, not Runtime-provided schemas
  - Create `get_tool_contract/2`, `list_available_tools/1`, and `unregister_runtime/2` functions
  - Add comprehensive audit logging for mode changes and dynamic registrations
  - Write unit tests for contract loading, bootstrap discovery, fulfillment validation, dynamic registration, mode switching, namespacing, and security enforcement
  - _Requirements: 6.1, 6.2, 6.4, 6.5, 6.6, 12.1, 12.2, 12.3, 12.4, 12.5, 12.6, 12.7_

- [ ] 3.2 Build Tool Discovery System
  - Implement automatic tool discovery from runtime reflection
  - Create tool definition validation against ALTAR type system
  - Add dynamic tool re-registration support without connection restart
  - Implement tool metadata indexing for efficient querying
  - Write unit tests for tool discovery, validation, and dynamic updates
  - _Requirements: 6.1, 6.3, 6.5_

- [ ] 3.3 Create Tool Execution Tracking
  - Implement invocation tracking with unique correlation IDs
  - Create tool execution state management (pending, executing, completed, failed)
  - Add execution metrics collection (duration, success rate, error tracking)
  - Implement concurrent invocation limits and resource management
  - Write unit tests for execution tracking and metrics collection
  - _Requirements: 7.1, 7.2, 9.2_

- [ ] 4. Transport Abstraction Layer
  - Create transport-agnostic message handling
  - Implement multiple transport backends (gRPC, WebSocket, TCP)
  - Build connection management and health monitoring
  - _Requirements: 1.1, 1.4_

- [ ] 4.1 Design Transport Behaviour Interface
  - Create `ALTAR.Transport.Behaviour` with start_link, send_message, subscribe_events callbacks
  - Define connection lifecycle management interface
  - Implement transport-agnostic message envelope format
  - Create connection health monitoring and heartbeat mechanisms
  - Write unit tests for transport behaviour interface and message envelope handling
  - _Requirements: 1.1_

- [ ] 4.2 Implement gRPC Transport
  - Create `ALTAR.Transport.GRPC` module implementing transport behaviour
  - Generate Protocol Buffers definitions for ALTAR messages
  - Implement bidirectional streaming support for tool invocations
  - Add gRPC-specific error handling and status code mapping
  - Write integration tests for gRPC transport with multiple concurrent connections
  - _Requirements: 1.1, 7.4_

- [ ] 4.3 Implement WebSocket Transport
  - Create `ALTAR.Transport.WebSocket` module with real-time bidirectional communication
  - Implement WebSocket message framing and protocol negotiation
  - Add connection state management and automatic reconnection
  - Create WebSocket-specific heartbeat and keep-alive mechanisms
  - Write integration tests for WebSocket transport with connection resilience
  - _Requirements: 1.1_

- [ ] 4.4 Build Connection Pool Management
  - Implement connection pooling for efficient resource utilization
  - Create load balancing across multiple runtime connections
  - Add connection health monitoring with automatic failover
  - Implement connection lifecycle events and telemetry
  - Write unit tests for connection pooling, load balancing, and failover scenarios
  - _Requirements: 12.5_

- [ ] 5. Runtime Management System
  - Implement runtime registration and lifecycle management
  - Create runtime health monitoring and heartbeat system
  - Build runtime capability negotiation and versioning
  - _Requirements: 2.1, 8.2_

- [ ] 5.1 Create Runtime Registry
  - Implement `ALTAR.RuntimeRegistry` GenServer for runtime connection tracking
  - Create runtime registration with capability negotiation and version checking
  - Add runtime health status monitoring (healthy, degraded, unhealthy)
  - Implement runtime metadata management and querying
  - Write unit tests for runtime registration, health monitoring, and metadata management
  - _Requirements: 2.1_

- [ ] 5.2 Build Runtime Health Monitoring
  - Implement heartbeat mechanism with configurable intervals
  - Create health check system with automatic status updates
  - Add runtime performance metrics collection (response time, throughput)
  - Implement automatic runtime disconnection for unhealthy instances
  - Write unit tests for health monitoring, heartbeat handling, and automatic cleanup
  - _Requirements: 8.2_

- [ ] 5.3 Implement Runtime Capability System
  - Create capability declaration and negotiation during runtime registration
  - Implement feature flag system for optional protocol features
  - Add version compatibility checking and protocol negotiation
  - Create capability-based tool routing and feature enablement
  - Write unit tests for capability negotiation and version compatibility
  - _Requirements: 2.1_

- [ ] 6. Tool Invocation Engine
  - Create tool invocation orchestration and routing
  - Implement parameter validation and type checking
  - Build result handling and error management
  - _Requirements: 7.1, 7.2, 7.3, 7.4, 7.5, 8.1, 8.3, 8.4_

- [ ] 6.1 Build Invocation Orchestrator
  - Create `ALTAR.InvocationEngine` GenServer for tool execution coordination
  - Implement invocation routing to appropriate runtime based on tool registration
  - Add invocation queuing and concurrent execution management
  - Create invocation lifecycle tracking with state transitions
  - Write unit tests for invocation routing, queuing, and lifecycle management
  - _Requirements: 7.1, 7.2_

- [ ] 6.2 Implement Parameter Validation
  - Create parameter validation against tool definition schemas
  - Implement type coercion and conversion for compatible types
  - Add parameter constraint validation (min/max, regex patterns, enum values)
  - Create detailed validation error messages with field-level feedback
  - Write unit tests for parameter validation, type coercion, and error reporting
  - _Requirements: 7.3, 8.3_

- [ ] 6.3 Build Result Processing System
  - Implement result deserialization and type validation
  - Create structured error handling with error code classification
  - Add result transformation and format conversion
  - Implement result caching for idempotent operations
  - Write unit tests for result processing, error handling, and caching
  - _Requirements: 7.5, 8.1_

- [ ] 6.4 Create Timeout and Retry Logic
  - Implement configurable timeout handling for tool invocations
  - Create retry policies with exponential backoff and circuit breaker patterns
  - Add timeout escalation and graceful degradation
  - Implement invocation cancellation and cleanup
  - Write unit tests for timeout handling, retry logic, and cancellation
  - _Requirements: 8.4_

- [ ] 7. Level 2 Streaming Support Implementation
  - Create streaming tool invocation support for Level 2+ compliance
  - Implement chunk ordering and stream management with in-band error handling
  - Build stream lifecycle and enhanced error handling with StreamChunk error_details
  - _Requirements: 7.4, 7.5, 7.6, 7.7_

- [ ] 7.1 Implement Stream Management
  - Create `ALTAR.StreamManager` for managing streaming tool invocations
  - Implement stream chunk ordering and reassembly
  - Add stream state tracking (active, paused, completed, error)
  - Create stream timeout and cleanup mechanisms
  - Write unit tests for stream management, chunk ordering, and state transitions
  - _Requirements: 7.4_

- [ ] 7.2 Build Enhanced Stream Chunk Processing
  - Implement chunk validation and sequence number checking
  - Create chunk buffering and out-of-order handling
  - Add stream completion detection and final chunk processing
  - Implement in-band error handling with StreamChunk error_details field
  - Add logic for error chunks with is_final=true and ignored payload
  - Create stream error recovery mechanisms and partial failure handling
  - Write unit tests for chunk processing, buffering, in-band error reporting, and error recovery
  - _Requirements: 7.5, 7.6, 7.7_

- [ ] 7.3 Create Stream Client Interface
  - Implement client-side stream subscription and event handling
  - Create stream progress callbacks and event notifications
  - Add stream control operations (pause, resume, cancel)
  - Implement stream backpressure and flow control
  - Write integration tests for stream client interface and flow control
  - _Requirements: 7.4_

- [ ] 8. Error Handling and Resilience
  - Implement comprehensive error classification and handling
  - Create circuit breaker and failover mechanisms
  - Build error recovery and retry strategies
  - _Requirements: 8.1, 8.2, 8.3, 8.4, 8.5_

- [ ] 8.1 Create Error Classification System
  - Implement `ALTAR.Types.Error` with comprehensive error codes
  - Create error message standardization and localization support
  - Add error context and debugging information collection
  - Implement error severity classification and escalation
  - Write unit tests for error classification, message formatting, and context collection
  - _Requirements: 8.1_

- [ ] 8.2 Build Circuit Breaker Implementation
  - Create circuit breaker pattern for runtime health management
  - Implement failure threshold detection and automatic circuit opening
  - Add circuit breaker state management (closed, open, half-open)
  - Create circuit breaker recovery and health check mechanisms
  - Write unit tests for circuit breaker state transitions and recovery
  - _Requirements: 8.2_

- [ ] 8.3 Implement Graceful Degradation
  - Create fallback mechanisms for unavailable tools and runtimes
  - Implement partial failure handling for batch operations
  - Add service degradation notifications and status reporting
  - Create alternative execution paths for critical operations
  - Write integration tests for graceful degradation scenarios
  - _Requirements: 8.2, 8.5_

- [ ] 9. Level 2+ Security and Authorization Framework
  - Implement authentication and authorization mechanisms for Level 2+ compliance
  - Create security context management and access control with Host-managed contracts
  - Build audit logging and security monitoring with contract validation
  - Implement protection against "Trojan Horse" tool definitions through Host-controlled contracts
  - _Requirements: 10.1, 10.2, 10.3, 10.4, 10.5, 6.4_

- [ ] 9.1 Build Authentication System
  - Create `ALTAR.Auth.Behaviour` interface for pluggable authentication
  - Implement API key authentication with secure key storage and validation
  - Add certificate-based authentication with PKI support
  - Create OAuth 2.0 integration for enterprise identity providers
  - Write unit tests for authentication mechanisms and security validation
  - _Requirements: 10.1_

- [ ] 9.2 Implement Authorization Engine
  - Create `ALTAR.Authorization` module for access control decisions
  - Implement session-based authorization with role and permission management
  - Add tool-level authorization with fine-grained access control
  - Create authorization policy engine with rule-based decisions
  - Write unit tests for authorization decisions and policy enforcement
  - _Requirements: 10.2_

- [ ] 9.3 Build Security Context Management
  - Implement security context propagation across invocations
  - Create secure parameter handling with encryption and redaction
  - Add security audit logging with tamper-proof storage
  - Implement security event monitoring and alerting
  - Write unit tests for security context handling and audit logging
  - _Requirements: 10.3, 10.4_

- [ ] 9.4 Create Data Protection Layer
  - Implement message-level encryption for sensitive data
  - Create secure storage for credentials and sensitive configuration
  - Add data retention policies with automatic secure deletion
  - Implement secure communication channels with TLS/SSL
  - Write security tests for encryption, secure storage, and data protection
  - _Requirements: 10.3, 10.5_

- [ ] 10. Telemetry and Observability
  - Implement comprehensive telemetry event system
  - Create metrics collection and aggregation
  - Build distributed tracing and correlation
  - _Requirements: 9.1, 9.2, 9.3, 9.4, 9.5_

- [ ] 10.1 Build Telemetry Event System
  - Create `ALTAR.Telemetry` module with standardized event definitions
  - Implement telemetry event emission for all protocol operations
  - Add event metadata collection with correlation IDs and timestamps
  - Create telemetry event filtering and sampling mechanisms
  - Write unit tests for telemetry event emission and metadata collection
  - _Requirements: 9.1, 9.5_

- [ ] 10.2 Implement Metrics Collection
  - Create metrics collection for invocation count, duration, success rate, error rate
  - Implement session metrics with active sessions, duration, resource usage
  - Add runtime metrics for connection count, health status, response times
  - Create system metrics collection for memory, CPU, network throughput
  - Write unit tests for metrics collection, aggregation, and reporting
  - _Requirements: 9.2_

- [ ] 10.3 Build Distributed Tracing
  - Implement OpenTelemetry integration for distributed tracing
  - Create span propagation across runtime boundaries
  - Add trace context management and correlation ID tracking
  - Implement trace sampling and export configuration
  - Write integration tests for distributed tracing across multiple runtimes
  - _Requirements: 9.3, 9.4_

- [ ] 10.4 Create Monitoring Dashboard
  - Implement real-time monitoring dashboard with key metrics visualization
  - Create alerting system for critical errors and performance degradation
  - Add health check endpoints for external monitoring systems
  - Implement log aggregation and structured logging
  - Write integration tests for monitoring dashboard and alerting
  - _Requirements: 9.2, 9.5_

- [ ] 11. Integration Layer Development
  - Create integration adapters for existing systems
  - Implement compatibility layers for popular protocols
  - Build migration utilities and tools
  - _Requirements: 11.1, 11.2, 11.3, 11.4, 11.5_

- [ ] 11.1 Build Gemini Integration Adapter
  - Create `ALTAR.Integrations.Gemini` module for Google GenAI SDK compatibility
  - Implement conversion from ALTAR tools to Gemini FunctionDeclaration format
  - Add Gemini function call handling with automatic parameter mapping
  - Create bidirectional conversion for tool results and error handling
  - Write integration tests with actual Gemini API calls and tool execution
  - _Requirements: 11.1_

- [ ] 11.2 Implement MCP Compatibility Layer
  - Create `ALTAR.Integrations.MCP` module for Model Context Protocol support
  - Implement MCP message format conversion to ALTAR protocol
  - Add MCP tool definition import and export functionality
  - Create MCP session and context management compatibility
  - Write integration tests for MCP protocol compatibility and message conversion
  - _Requirements: 11.2_

- [ ] 11.3 Create Legacy System Bridges
  - Implement REST API bridge for converting HTTP endpoints to ALTAR tools
  - Create database bridge for exposing SQL operations as ALTAR tools
  - Add file system bridge for file operations through ALTAR protocol
  - Implement external API bridge for third-party service integration
  - Write integration tests for legacy system bridges and data conversion
  - _Requirements: 11.3_

- [ ] 11.4 Build Migration Utilities
  - Create migration tools for converting existing tool definitions to ALTAR format
  - Implement configuration migration utilities for smooth system transitions
  - Add validation tools for verifying migration completeness and correctness
  - Create rollback mechanisms for failed migrations
  - Write unit tests for migration utilities and validation tools
  - _Requirements: 11.5_

- [ ] 12. Level 3 Performance Optimization and Scalability
  - Implement high-performance message processing for Level 3 enterprise compliance
  - Create connection pooling and load balancing for multi-host deployments
  - Build caching and optimization strategies with distributed state management
  - Implement horizontal scaling with Host clustering
  - _Requirements: 12.1, 12.2, 12.3, 12.4, 12.5, 1.9_

- [ ] 12.1 Optimize Message Processing
  - Implement high-performance binary serialization with minimal memory allocation
  - Create message batching for improved throughput
  - Add message compression for bandwidth-constrained environments
  - Implement zero-copy message handling where possible
  - Write performance tests for message processing throughput and latency
  - _Requirements: 12.3_

- [ ] 12.2 Build Connection Pool Optimization
  - Implement efficient connection pooling with dynamic sizing
  - Create load balancing algorithms for optimal runtime utilization
  - Add connection health monitoring with automatic pool management
  - Implement connection multiplexing for reduced resource usage
  - Write performance tests for connection pooling and load balancing
  - _Requirements: 12.5_

- [ ] 12.3 Create Caching Strategy
  - Implement tool definition caching with intelligent invalidation
  - Create session state caching for faster access patterns
  - Add result caching for idempotent operations with TTL management
  - Implement distributed caching for multi-host deployments
  - Write performance tests for caching effectiveness and hit rates
  - _Requirements: 12.3_

- [ ] 12.4 Build Horizontal Scaling Support
  - Implement host clustering with distributed session management
  - Create load distribution mechanisms across multiple hosts
  - Add cluster membership management and failure detection
  - Implement data consistency mechanisms for distributed state
  - Write integration tests for horizontal scaling and cluster operations
  - _Requirements: 12.4_

- [ ] 13. Testing and Quality Assurance
  - Create comprehensive test suites for all components
  - Implement performance and load testing
  - Build compatibility and interoperability testing
  - _Requirements: All requirements validation_

- [ ] 13.1 Build Comprehensive Unit Test Suite
  - Create unit tests for all core modules with 90%+ code coverage
  - Implement property-based testing for message serialization and type validation
  - Add edge case testing for error conditions and boundary values
  - Create mock implementations for external dependencies
  - Write test utilities for common testing patterns and fixtures
  - _Requirements: All functional requirements_

- [ ] 13.2 Implement Integration Test Framework
  - Create integration test framework for multi-runtime scenarios
  - Implement end-to-end testing with real runtime connections
  - Add cross-transport testing to verify protocol consistency
  - Create chaos testing for resilience and error handling validation
  - Write integration tests for all major user workflows
  - _Requirements: All integration requirements_

- [ ] 13.3 Build Performance Test Suite
  - Implement load testing for concurrent invocation scenarios
  - Create throughput testing for message processing performance
  - Add latency testing for end-to-end invocation timing
  - Implement memory usage testing for long-running operations
  - Write performance benchmarks and regression testing
  - _Requirements: 12.1, 12.2_

- [ ] 13.4 Create Compatibility Test Matrix
  - Implement cross-language compatibility testing
  - Create version compatibility testing for protocol evolution
  - Add transport compatibility testing across different backends
  - Implement security compatibility testing for authentication methods
  - Write compatibility test automation and reporting
  - _Requirements: 11.4, 11.5_

- [ ] 14. Protocol Refinements and Enhanced Features
  - Implement enhanced correlation ID propagation for end-to-end tracing
  - Add explicit null value handling to avoid serialization ambiguity
  - Create well-known capability string definitions and validation
  - Build Development Mode workflow with security warnings and audit logging
  - Implement Runtime bootstrap discovery flow
  - _Requirements: 13.1, 13.2, 13.3, 13.4, 13.5, 12.5, 12.6, 12.7_

- [ ] 14.1 Implement Enhanced Correlation and Tracing
  - Add correlation_id field to ToolCall and ToolResult messages for end-to-end tracing
  - Implement correlation ID propagation through all tool invocation chains
  - Create correlation ID generation and validation utilities
  - Add correlation ID indexing for distributed tracing integration
  - Write unit tests for correlation ID propagation and tracing integration
  - _Requirements: 13.2, 13.3_

- [ ] 14.2 Build Well-Known Capability System
  - Define standardized capability strings for core, feature, transport, and security capabilities
  - Implement capability validation during Runtime announcement
  - Create capability matching logic for contract discovery
  - Add capability-based feature enablement and routing
  - Write unit tests for capability validation and matching
  - _Requirements: 13.4, 12.7_

- [ ] 14.3 Implement Development Mode Workflow
  - Create Host mode management with STRICT and DEVELOPMENT modes
  - Implement secure mode switching with admin authentication
  - Add comprehensive audit logging for mode changes and dynamic registrations
  - Create security warning system for development mode operations
  - Build session-scoped dynamic tool registration for development
  - Write integration tests for development workflow and security enforcement
  - _Requirements: 12.1, 12.2, 12.3, 12.4_

- [ ] 14.4 Build Runtime Bootstrap Discovery System
  - Implement GetAvailableContracts RPC for Runtime contract discovery
  - Create contract filtering by Runtime capabilities
  - Add contract-to-capability matching logic
  - Implement Runtime bootstrap flow: connect -> discover -> fulfill
  - Write integration tests for bootstrap discovery workflow
  - _Requirements: 12.5, 12.6_

- [ ] 15. Compliance Level Documentation and Examples
  - Create comprehensive API documentation with compliance level breakdown
  - Build example implementations for each compliance level
  - Write deployment and operations guides with security best practices
  - Create migration guides from existing tool systems
  - _Requirements: Protocol adoption and usability_

- [ ] 15.1 Write Enhanced Compliance Level API Documentation
  - Create comprehensive API documentation organized by compliance levels (Level 1, 2, 3)
  - Write protocol specification documentation with language-neutral IDL message schemas
  - Add compliance level feature matrix showing which features are required at each level
  - Create security model documentation explaining Host-managed contracts and trust architecture
  - Write developer experience guide covering Development Mode vs Production Mode workflows
  - Add Runtime bootstrap discovery documentation with flow diagrams
  - Write developer guide for implementing custom runtimes with compliance level requirements
  - Add migration guide from existing tool systems (MCP, GenAI SDK) to ALTAR
  - Create troubleshooting guide with common issues and solutions per compliance level
  - Document well-known capability strings and their usage patterns
  - _Requirements: Developer experience, protocol adoption, 12.7, 13.4_

- [ ] 15.2 Build Enhanced Compliance Level Example Implementations
  - Create Level 1 example implementations in Python, Node.js, and Go showing minimal viable ALTAR
  - Write Level 2 example implementations adding streaming and basic security features
  - Build Level 3 example implementations demonstrating enterprise features and clustering
  - Add example tool contract manifests for common use cases (database, file system, API calls)
  - Create example client applications demonstrating protocol usage at each compliance level
  - Build Development Mode examples showing rapid iteration workflow with security warnings
  - Create Runtime bootstrap discovery examples with contract fulfillment flow
  - Write progressive tutorial series: "Level 1 in 10 minutes", "Development Mode workflow", "Adding Level 2 features", "Enterprise Level 3 deployment"
  - Build reference implementations showing Host-managed contract security model
  - Add correlation ID tracing examples with distributed tracing integration
  - _Requirements: Developer adoption, security model understanding, 12.1, 12.5, 13.2_

- [ ] 14.3 Create Deployment Documentation
  - Write deployment guide for production environments
  - Create Docker containerization examples and best practices
  - Add Kubernetes deployment manifests and configuration
  - Write monitoring and observability setup guide
  - Create security hardening and best practices documentation
  - _Requirements: Production readiness_