Skip to content

IMPLEMENTATION_PLAN.md

Latest commit

 

History

History
459 lines (358 loc) · 14.3 KB

IMPLEMENTATION_PLAN.md

File metadata and controls

459 lines (358 loc) · 14.3 KB

Heare Memory Global Service - Implementation Plan

Overview

This document outlines the complete implementation plan for the Heare Memory Global Service. This plan is provisional and will be revised as we make progress through Phases 1 and 2, incorporating lessons learned and adjustments based on implementation realities.

Project Context

The Heare Memory Global Service implements the "global" tier of a three-tier memory architecture:

  • Session: Task-specific, may not persist beyond session
  • Project: Curated by humans/agents, project-specific (AGENTS.md concept)
  • Global: Cross-project concepts, multi-agent accessible, implicit interaction model

This project focuses exclusively on the global memory service implementation.

Implementation Philosophy

  • Autonomous Execution: Each issue is designed for independent agent execution
  • Clear Exit Criteria: Every task has specific, measurable completion conditions
  • Security First: Path validation and input sanitization throughout
  • Git-Native: All operations backed by git commits for full audit trail
  • API-Driven: RESTful interface following OpenAPI specifications

Phase 1: Core Infrastructure

Goal: Establish foundational infrastructure for the memory service Timeline: Week 1 Status: Issues Created

Issues Created

HEARE-2: Project Setup - Initialize UV project structure

  • Update pyproject.toml with complete dependencies
  • Create proper Python package structure
  • Set up development environment
  • Priority: High

HEARE-3: Pre-commit Hooks Setup

  • Configure ruff and autoflake hooks
  • Set up code quality automation
  • Priority: High

HEARE-4: Basic FastAPI Application Structure

  • Create FastAPI app with router structure
  • Set up middleware framework
  • Configure CORS and basic error handling
  • Priority: High

HEARE-5: Setup pytest with asyncio fixtures

  • Configure testing framework
  • Create reusable test fixtures
  • Set up coverage reporting
  • Priority: Medium

HEARE-6: Configuration Module with Pydantic Settings

  • Implement environment variable configuration
  • Add validation for required/optional settings
  • Support for .env files
  • Priority: High

HEARE-7: Startup Checks Implementation

  • Verify external tool availability (git, gh, ripgrep)
  • Initialize or validate git repository
  • Configure authentication and read-only mode
  • Priority: High

HEARE-8: Logging Configuration

  • Set up structured logging with JSON format
  • Configure different log levels and categories
  • Add request/response logging middleware
  • Priority: Medium

HEARE-9: Health Check Endpoint Implementation

  • Implement GET /health with comprehensive status
  • Report git configuration, search backend, read-only mode
  • Priority: Medium

HEARE-10: Git Integration Foundation

  • Create git operations wrapper
  • Implement commit creation and push logic
  • Add retry mechanisms and error handling
  • Priority: High

Phase 2: Core CRUD Operations

Goal: Implement basic memory node CRUD operations with git integration Timeline: Week 1-2 Status: Issues Created

Issues Created

HEARE-11: Async File System Operations Module

  • Create async file read/write utilities
  • Implement path validation and sanitization
  • Add atomic file operations and directory management
  • Priority: High

HEARE-12: Memory Node Data Models

  • Create Pydantic models for memory nodes and API operations
  • Add validation for content and paths
  • Implement serialization/deserialization
  • Priority: High

HEARE-13: GET /memory/{path} Endpoint Implementation

  • Implement memory node retrieval
  • Add proper HTTP headers (ETag, Last-Modified)
  • Handle 404 errors and security validation
  • Priority: High

HEARE-14: PUT /memory/{path} Endpoint Implementation

  • Implement memory node create/update
  • Add atomic file operations with git commits
  • Handle read-only mode and conflict detection
  • Priority: High

HEARE-15: DELETE /memory/{path} Endpoint Implementation

  • Implement memory node deletion
  • Add directory cleanup and git commits
  • Handle idempotency and error cases
  • Priority: High

HEARE-16: Authentication Middleware

  • Implement read-only mode enforcement
  • Add request method filtering
  • Create authentication context
  • Priority: Medium

HEARE-17: Error Handling Middleware

  • Create consistent error response format
  • Map exceptions to HTTP status codes
  • Add comprehensive error logging
  • Priority: Medium

HEARE-18: CRUD Operations Testing Foundation

  • Create comprehensive test suite for CRUD operations
  • Add integration tests with git workflow
  • Implement concurrent operation testing
  • Priority: High

Phase 3: Advanced Features

Goal: Add search, batch operations, and metadata features Timeline: Week 2 Status: To Be Created

3.1 List and Search Operations

GET /list Endpoint

  • Implement memory node listing with filtering
  • Add support for prefix, delimiter, recursive options
  • Handle hierarchical directory structure
  • Include optional content in responses

Search Infrastructure

  • Create ripgrep wrapper with grep fallback
  • Implement search query validation and sanitization
  • Add context line support around matches
  • Handle large result sets with pagination

GET /search Endpoint

  • Implement content search across memory nodes
  • Add search result highlighting and context
  • Support prefix-based search scoping
  • Add performance optimizations for large repositories

3.2 Batch Operations

Batch Operation Schema

  • Design batch operation request/response models
  • Add validation for operation sequences
  • Implement operation ordering and dependencies
  • Add atomic transaction support

POST /batch Endpoint

  • Implement batch create/update/delete operations
  • Add transaction rollback on any operation failure
  • Create single git commit for entire batch
  • Add batch operation size limits

Batch Validation and Testing

  • Implement comprehensive batch operation validation
  • Add tests for complex batch scenarios
  • Test rollback behavior on failures
  • Add performance tests for large batches

3.3 Metadata and History

File Metadata Enhancement

  • Add comprehensive file metadata to all responses
  • Implement efficient metadata caching
  • Add file relationship tracking
  • Include git history integration

GET /commits Endpoint

  • Implement commit history listing
  • Add filtering by path and date ranges
  • Include commit statistics and file changes
  • Add pagination for large histories

Commit Analysis

  • Add commit impact analysis
  • Implement change detection and summaries
  • Create commit search functionality
  • Add performance metrics for git operations

Phase 4: Production Features

Goal: Performance optimization, observability, and production readiness Timeline: Week 3 Status: To Be Created

4.1 Performance Optimization

Response Caching

  • Implement intelligent caching for frequently accessed nodes
  • Add ETag support for client-side caching
  • Create cache invalidation strategies
  • Add cache performance monitoring

Connection Pooling

  • Implement git operation connection pooling
  • Add async operation optimization
  • Create resource usage monitoring
  • Optimize for concurrent request handling

Large File Handling

  • Implement streaming for large file responses
  • Add partial content support (HTTP Range requests)
  • Create memory usage optimization
  • Add file size limits and validation

Performance Benchmarking

  • Create comprehensive performance test suite
  • Add load testing scenarios
  • Implement performance regression detection
  • Create performance monitoring dashboards

4.2 Observability

Structured Logging Enhancement

  • Add comprehensive request tracing
  • Implement correlation ID tracking
  • Create performance logging
  • Add business logic event logging

Metrics Collection

  • Implement Prometheus-compatible metrics
  • Add custom business metrics
  • Create performance monitoring
  • Add alerting thresholds

Audit Logging

  • Create comprehensive audit trail for all mutations
  • Add user action tracking
  • Implement security event logging
  • Add compliance reporting features

Error Tracking

  • Integrate with error tracking services
  • Add error categorization and alerting
  • Create error trend analysis
  • Implement automated error reporting

4.3 Documentation and Client Support

OpenAPI Schema Enhancement

  • Generate comprehensive API documentation
  • Add detailed examples and use cases
  • Create interactive API documentation
  • Add client SDK generation support

GET /schema Endpoint

  • Implement dynamic schema generation
  • Add schema versioning support
  • Create schema validation utilities
  • Add backward compatibility tracking

API Documentation

  • Create comprehensive API usage guide
  • Add integration examples and patterns
  • Create troubleshooting documentation
  • Add performance optimization guide

Client Libraries

  • Create client generation templates
  • Add language-specific examples
  • Create SDK documentation
  • Add client testing utilities

Phase 5: Deployment & Operations

Goal: Production deployment, security hardening, and operational procedures Timeline: Week 3-4 Status: To Be Created

5.1 Packaging and Deployment

Container Packaging

  • Create optimized Docker image
  • Add multi-stage build process
  • Include all required external tools
  • Create deployment automation

Installation and Setup

  • Create automated installation scripts
  • Add platform detection and compatibility
  • Create configuration templates
  • Add migration and upgrade procedures

CI/CD Integration

  • Create GitHub Actions workflows
  • Add automated testing and deployment
  • Create release automation
  • Add deployment validation

Environment Management

  • Create environment-specific configurations
  • Add secrets management integration
  • Create deployment verification
  • Add rollback procedures

5.2 Security Hardening

Input Validation and Sanitization

  • Implement comprehensive input validation
  • Add XSS prevention for markdown content
  • Create injection attack prevention
  • Add rate limiting and abuse prevention

Security Headers and CORS

  • Implement security header middleware
  • Add CORS configuration for production
  • Create CSP policies
  • Add security monitoring

Authentication and Authorization

  • Enhance authentication mechanisms
  • Add authorization levels if needed
  • Create API key management
  • Add security audit logging

Security Testing

  • Create security test suite
  • Add penetration testing automation
  • Implement vulnerability scanning
  • Create security incident response

5.3 Operations and Monitoring

Backup and Recovery

  • Implement automated backup procedures
  • Create point-in-time recovery
  • Add backup validation and testing
  • Create disaster recovery procedures

Monitoring and Alerting

  • Create comprehensive monitoring setup
  • Add health check automation
  • Implement alert escalation
  • Create performance dashboards

Capacity Planning

  • Add resource usage monitoring
  • Create capacity planning tools
  • Implement auto-scaling if needed
  • Add performance optimization

Operations Documentation

  • Create comprehensive operations runbook
  • Add troubleshooting procedures
  • Create incident response playbooks
  • Add maintenance procedures

Success Criteria

Phase 1 Success Criteria

  • All external dependencies properly configured
  • FastAPI application starts and responds to health checks
  • Git integration creates commits and pushes successfully
  • Configuration system handles all environment variables
  • Testing framework ready for development

Phase 2 Success Criteria

  • All CRUD operations work with git commits
  • Path validation prevents security vulnerabilities
  • Read-only mode enforcement works correctly
  • Error handling provides consistent, helpful responses
  • Comprehensive test coverage for core functionality

Phase 3 Success Criteria

  • Search functionality performs well on large repositories
  • Batch operations are atomic and handle failures gracefully
  • Listing operations support all specified filtering options
  • Metadata and history features provide useful insights

Phase 4 Success Criteria

  • Performance meets production requirements
  • Observability provides comprehensive system insights
  • API documentation enables easy integration
  • Client libraries support major use cases

Phase 5 Success Criteria

  • Service deploys reliably in production environments
  • Security hardening prevents common attack vectors
  • Operations procedures enable reliable maintenance
  • Monitoring and alerting provide proactive issue detection

Risk Mitigation

Technical Risks

  • Git Repository Corruption: Regular backup procedures, repository validation
  • Performance Degradation: Comprehensive testing, performance monitoring
  • Security Vulnerabilities: Regular security audits, input validation
  • Concurrent Access Issues: Proper locking, conflict resolution

Operational Risks

  • Service Downtime: Health monitoring, graceful degradation
  • Data Loss: Git-backed storage, automated backups
  • Configuration Errors: Validation, environment management
  • Scaling Issues: Performance testing, capacity planning

Notes on Plan Evolution

This implementation plan is provisional and will be updated based on:

  1. Technical Discovery: Issues encountered during Phase 1 and 2 implementation
  2. Performance Requirements: Actual performance characteristics vs. assumptions
  3. Integration Needs: Requirements that emerge from real-world usage
  4. Resource Constraints: Time and complexity adjustments based on progress
  5. Stakeholder Feedback: Changes in requirements or priorities

Plan Revision Process:

  • After Phase 1 completion: Review and adjust Phase 2 and 3 plans
  • After Phase 2 completion: Finalize Phase 3 and review Phase 4-5 plans
  • Continuous: Update individual issues based on implementation learnings

Key Decision Points:

  • Semantic search implementation approach (Phase 3+)
  • Implicit observation pipeline design (Phase 4+)
  • Multi-agent coordination mechanisms (Phase 5+)
  • Deployment architecture and scaling strategy (Phase 5)

This plan provides a solid foundation while maintaining flexibility for evolution as we gain implementation experience.