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Agent Exchange - Implementation TODO

Status Legend

  • ✅ Complete
  • 🚧 In Progress
  • 📋 Planned
  • 🔮 Future Enhancement

Phase A: Initial Implementation (API-based)

Foundation

  • ✅ Resolve merge conflicts (Python → Go conversion)
  • ✅ Align event naming with canonical schema
  • ✅ Verify existing Go implementations
  • ✅ Create shared event types package (src/internal/events/types.go)
  • ✅ Create HTTP-based event publisher (src/internal/events/publisher.go)

Core Services Implementation

1. aex-work-publisher ✅

Priority: HIGH - Entry point of the system

  • ✅ Implement work submission API (POST /v1/work)
  • ✅ Implement work retrieval API (GET /v1/work/{work_id})
  • ✅ Implement work cancellation API (POST /v1/work/{work_id}/cancel)
  • ✅ Add MongoDB store implementation (local development)
  • ✅ Add Firestore store implementation (production)
  • ✅ Add in-memory store implementation (testing)
  • ✅ Add provider registry client
  • ✅ Add bid window tracking (in-memory for now, Cloud Tasks later)
  • ✅ Wire up event publishing for:
    • work.submitted
    • work.bid_window_closed
    • work.cancelled
  • ✅ Add configuration and environment variables
  • ✅ Update main.go with actual service initialization

2. aex-settlement ✅

Priority: HIGH - Financial backbone

  • ✅ Implement cost calculation service (CPC pricing with 15% platform fee)
  • ✅ Implement settlement transaction with ledger entries
  • ✅ Implement usage API (GET /v1/usage)
  • ✅ Implement transactions API (GET /v1/usage/transactions)
  • ✅ Implement balance API (GET /v1/balance)
  • ✅ Implement deposit API (POST /v1/deposits)
  • ✅ Wire up event handling for:
    • contract.completed (incoming via POST /internal/settlement/complete)
    • settlement.completed (outgoing)
  • ✅ Add MongoDB store implementation (for local development)
  • ✅ Add configuration and environment variables
  • ✅ Update main.go with actual service initialization
  • Add BigQuery export functionality (future enhancement)

3. aex-gateway ✅

Priority: MEDIUM - API Gateway

  • ✅ Implement JWT authentication middleware
  • ✅ Implement API key authentication
  • ✅ Implement rate limiting (in-memory)
  • ✅ Implement request routing to backend services
  • ✅ Add CORS handling
  • ✅ Add request/response logging
  • ✅ Add health check endpoints
  • ✅ Add configuration and environment variables
  • ✅ Update main.go with actual service initialization

4. aex-telemetry ✅

Priority: MEDIUM - Observability

  • ✅ Implement centralized logging endpoint
  • ✅ Implement metrics collection endpoint
  • ✅ Add structured log aggregation
  • ✅ Add trace span collection and querying
  • ✅ Add configuration and environment variables
  • ✅ Update main.go with actual service initialization

Service Integration

HTTP Clients ✅

  • ✅ Create shared HTTP client utilities (src/internal/httpclient/)
    • ✅ Retry logic with exponential backoff
    • ✅ Timeout configuration
    • ✅ Authentication headers (Bearer, API Key, Basic Auth)
    • ✅ Request builder with fluent API
    • ✅ JSON encoding/decoding helpers
    • ✅ Error types for HTTP errors
  • ✅ Create provider-registry client for work-publisher
  • ✅ Create work-publisher client for bid-evaluator
  • ✅ Create settlement client for contract-engine
  • ✅ Create bid-gateway client for work-publisher
  • Create identity client for settlement (future enhancement)

Event Wiring ✅

  • ✅ Wire bid-evaluator to call work-publisher for work specs (client ready)
  • ✅ Wire contract-engine to call settlement on completion (client ready)
  • ✅ Wire work-publisher to call provider-registry for subscriptions (implemented)
  • ✅ Wire bid-gateway to call work-publisher (client ready)
  • Wire contract-engine to call trust-broker on completion (future enhancement)

Infrastructure

Docker & Development ✅

  • ✅ Update Docker Compose with all services
    • ✅ MongoDB for services
    • ✅ All microservices
    • ✅ Health checks
    • ✅ Service dependencies
  • ✅ Create shared environment variables file (.env.example)
  • ✅ Add database initialization scripts (hack/mongo-init.js)
  • ✅ Add sample data seeding

Build & Deploy ✅

  • ✅ Update Makefile with targets:
    • ✅ make build - Build all services
    • ✅ make test - Run all tests
    • ✅ make run - Start with Docker Compose
    • ✅ make clean - Clean build artifacts
    • ✅ make lint - Run linters
    • ✅ make quickstart - One-command setup
    • ✅ make health - Check all services
  • ✅ Create Dockerfiles for work-publisher and settlement
  • ✅ Create Dockerfiles for remaining services
  • ✅ Add GitHub Actions CI/CD pipeline
    • ✅ CI workflow (lint, build, test, docker-build)
    • ✅ CD workflow (push to Artifact Registry, deploy to Cloud Run)
  • ✅ Add deployment scripts for Cloud Run
    • ✅ deploy-cloudrun.sh - Deploy services to staging/production
    • ✅ setup-gcp.sh - Initial GCP project setup

Testing

Integration Tests ✅

  • ✅ Create end-to-end test flow:
    1. Submit work via work-publisher
    2. Submit bids via bid-gateway
    3. Evaluate bids via bid-evaluator
    4. Award contract via contract-engine
    5. Complete contract and settle payment
    6. Verify ledger entries in settlement
  • ✅ Add test helpers and fixtures
  • ✅ Add API test client
  • ✅ Add database cleanup utilities

Unit Tests ✅

  • ✅ Add tests for work-publisher service logic
  • ✅ Add tests for settlement cost calculation
  • ✅ Add tests for settlement ACID transactions
  • ✅ Add tests for event publisher
  • ✅ Add tests for HTTP clients
  • ✅ Create shared test utilities and fixtures

Documentation ✅

  • ✅ Create QUICKSTART.md with:
    • ✅ Getting started guide
    • ✅ Service URLs and descriptions
    • ✅ Example API calls
    • ✅ Troubleshooting guide
    • ✅ Architecture diagram
  • ✅ Create IMPLEMENTATION_STATUS.md with:
    • ✅ Service implementation status
    • ✅ API endpoints documentation
    • ✅ Database architecture
    • ✅ Event flow diagrams
  • ✅ Create formal API documentation (OpenAPI/Swagger)
    • ✅ Complete OpenAPI 3.1 specification (api/openapi.yaml)
    • ✅ All service endpoints documented
    • ✅ Request/response schemas defined
    • ✅ Authentication documented
    • ✅ Swagger UI for interactive docs (make docs)
  • ✅ Create production deployment guide (DEPLOYMENT.md)
    • ✅ Prerequisites and GCP project setup
    • ✅ Infrastructure and database setup
    • ✅ Secret management
    • ✅ Building and pushing images
    • ✅ Deployment steps and configuration reference
    • ✅ Monitoring and observability
    • ✅ Scaling considerations
    • ✅ Security best practices
    • ✅ Troubleshooting and rollback procedures

AWS Deployment ✅

Infrastructure Setup

  • ✅ Create AWS setup script (hack/deploy/setup-aws.sh)
  • ✅ Create ECS/Fargate deployment script (hack/deploy/deploy-ecs.sh)
  • ✅ Set up Amazon ECR for container registry (via setup script)
  • ✅ Configure AWS ALB (Application Load Balancer) for routing
  • ✅ Configure AWS Secrets Manager for credentials
  • ✅ Set up CloudWatch for logging and metrics
  • ✅ Create VPC and security groups
  • 📋 Set up Amazon DocumentDB (optional, can use MongoDB Atlas)

CI/CD for AWS

  • ✅ Add GitHub Actions workflow for AWS deployment (.github/workflows/cd-aws.yml)
  • ✅ Configure OIDC for GitHub Actions → AWS authentication
  • ✅ Add ECR push workflow
  • ✅ Add ECS/Fargate deployment workflow

Documentation

  • ✅ Create AWS deployment guide (DEPLOYMENT_AWS.md)
  • ✅ Document cost comparison (GCP vs AWS)
  • 📋 Add Terraform/CloudFormation templates (optional)

Cleanup/Teardown

  • ✅ Create AWS teardown script (hack/deploy/teardown-aws.sh)
  • ✅ Create GCP teardown script (hack/deploy/teardown-gcp.sh)
  • ✅ Add Makefile targets: teardown-aws, teardown-gcp

Phase B: Pub/Sub Migration 🔮

Event Infrastructure

  • Set up Google Cloud Pub/Sub topics
  • Create Pub/Sub publisher implementation
  • Create Pub/Sub subscriber implementation
  • Implement event envelope validation
  • Implement idempotency checking (Redis)
  • Add dead letter queue handling

Service Updates

  • Replace HTTP calls with Pub/Sub in work-publisher
  • Replace HTTP calls with Pub/Sub in contract-engine
  • Replace HTTP calls with Pub/Sub in settlement
  • Replace HTTP calls with Pub/Sub in trust-broker
  • Replace HTTP calls with Pub/Sub in bid-gateway
  • Replace HTTP calls with Pub/Sub in bid-evaluator

Advanced Features

  • Implement Cloud Tasks for bid window scheduling
  • Implement WebSocket for real-time bid updates
  • Add Firestore change streams for live updates
  • Implement event replay mechanism
  • Add event sourcing for audit trail

Current Priority (Next 5 Tasks)

  1. ✅ Implement aex-work-publisher service

    • Work submission, retrieval, cancellation APIs
    • MongoDB/Firestore/Memory store implementations
    • Event publishing
    • HTTP handlers and routing
    • Configuration management

  2. ✅ Create HTTP client utilities

    • Shared retry/timeout logic with exponential backoff
    • Authentication handling (Bearer, API Key, Basic)
    • Request builder with fluent API
    • Error handling and logging

  3. ✅ Implement aex-settlement service

    • MongoDB-based ledger and balance tracking
    • Cost calculation with 15% platform fee
    • Settlement transactions with ledger entries
    • Usage, balance, and transaction APIs

  4. ✅ Infrastructure setup

    • Docker Compose with health checks and dependencies
    • Makefile with comprehensive targets
    • MongoDB initialization scripts
    • Environment configuration templates
    • Developer quick start guide

  5. ✅ Gateway service implementation

    • JWT and API key authentication
    • Rate limiting
    • Request routing
    • CORS handling

  6. ✅ Telemetry service implementation

    • Centralized logging endpoint
    • Metrics collection endpoint
    • Trace span collection

Phase A Complete!

All Phase A tasks have been completed. The system is ready for:

  • Local development with Docker Compose
  • Production deployment to Google Cloud Platform
  • CI/CD with GitHub Actions

Next Steps:

  1. 📋 AWS Deployment - Add support for deploying to AWS (ECS/Fargate)
  2. 🔮 Phase B - Pub/Sub Migration (when ready)

Notes

  • Initial implementation uses HTTP/REST APIs for service communication instead of Pub/Sub
  • Event publisher logs events for now, webhook support available
  • Migration to Pub/Sub is planned for Phase B after initial implementation is stable
  • Cloud Tasks will replace in-memory bid window tracking in Phase B
  • WebSocket will be added in Phase B for real-time updates

Last Updated: 2025-12-30