November 2025 Changelog

Detailed changes from November 2025, listed in reverse chronological order.

2025-11-20

Updated Foundations Page with Namespace Configuration References

Branch: copilot/update-documentation-for-namespaces

Summary: Enhanced the "Foundations" (key-documents) page with comprehensive references to the latest namespace configuration work, including RFC-047 (Namespace Reservation), RFC-056 (Unified Configuration Model), and the namespace-request documentation.

Changes:

• Added new "Phase 2.5: Namespace Configuration Deep Dive" (12 min) section
• Included RFC-056 (Unified Configuration Model) with key concepts
• Added practical Namespace Configuration documentation reference
• Included RFC-047 (Namespace Reservation with Lease Management)
• Updated "New to Prism" reading path from 35 min to 47 min
• Enhanced "Implementing a Feature" reading path with namespace configuration step
• Updated Quick Reference table to include namespace configuration documents
• Added "Namespace Management" category to Additional Deep Dives section
• Updated timestamp to 2025-11-20

Documents Referenced:

• RFC-056: Unified Configuration Model
• Namespace Configuration Documentation
• RFC-047: Namespace Reservation with Lease Management
• RFC-048: Cross-Proxy Partition Strategies
• ADR-006: Namespace and Multi-Tenancy

Impact: New users and implementers now have clear guidance on how namespace configuration has evolved, making it easier to understand the complete configuration story from user requests through platform provisioning.

---

2025-11-19

Pattern Proxy Integration Tests with Proper Layer Isolation

Branch: feature/vault-integration-phase2

Summary: Implemented proper integration tests that validate complete data flow through prism-proxy using pattern-level gRPC APIs. Tests connect to proxy (NOT backends directly), ensuring proper layer isolation and security. All backend services (Kafka, NATS, Redis, PostgreSQL) have no external port mappings - access is exclusively through prism-proxy.

Key Architectural Fix: Previous approach bypassed the proxy and connected tests directly to backends. This violated production architecture where backends are internal-only. New tests properly validate the entire stack: Test Client → Proxy (gRPC) → Pattern Runner → Pattern → Driver → Backend.

Security Model:

• Backend Isolation: No external ports on Kafka (9092), NATS (4222), Redis (6379), PostgreSQL (5432)
• Single Entry Point: Only prism-proxy exposed via localhost:50090 (gRPC), localhost:50091 (metrics)
• Internal Networks: Backends accessible only within Docker network
• Debugging: Use Prometheus metrics and container exec, not direct backend access

Test Architecture:

Test gRPC Client
    ↓
prism-proxy:50090 (ONLY exposed port)
    ↓ routes request
Pattern Runner (internal)
    ↓ executes pattern
Driver (internal)
    ↓ connects to backend
Backend (internal, no external ports)

Test Scenarios:

1. KeyValue Round-Trip with Random Data

• Generate random test data (UUID, timestamp, random int)
• Store via KeyValue.Store() gRPC call to proxy
• Retrieve via KeyValue.Retrieve() gRPC call to proxy
• Validate exact field-by-field match
• Proves: Data integrity through Client → Proxy → Pattern → Redis → Pattern → Proxy → Client

2. Producer/Consumer Message Flow

• Generate unique topic and random message
• Publish via Producer.Publish() with metadata
• Consume via Consumer.Consume() with timeout
• Validate message payload and envelope metadata
• Proves: Message flow through Client → Proxy → Producer → Kafka → Consumer → Proxy → Client

3. Session Context Propagation

• Publish message with session context (user_id, tenant_id, roles)
• Session credentials flow through envelope headers
• Pattern runners can access session for authorization

Test Execution:

# Start complete stack (proxy waits for backends)
docker-compose -f docker-compose.test.yml up -d

# Verify ONLY proxy is accessible
nc -zv localhost 50090  # ✓ Should succeed
nc -zv localhost 4222   # ✗ Should FAIL (NATS internal)
nc -zv localhost 6379   # ✗ Should FAIL (Redis internal)

# Run integration tests
go test -v ./tests/integration/patterns -run TestPatternProxyIntegration

Infrastructure Changes:

• docker-compose.test.yml: Removed all ports: mappings from backends
• Only prism-proxy and prism-admin have external ports
• Healthchecks run inside containers, not from host

New Files:

• tests/integration/patterns/pattern_proxy_integration_test.go (238 lines) - Proxy integration test
• pkg/patterns/common/envelope.go (185 lines) - Universal envelope format
• pkg/patterns/common/audit.go (175 lines) - Audit logging interfaces

Updated Files:

• docker-compose.test.yml - Removed external ports from kafka, nats, redis, postgres, localstack
• tests/integration/patterns/README.md - Updated with proper architecture diagrams and troubleshooting
• tests/integration/patterns/namespace_integration_test.go - Marked as DEPRECATED (bypassed proxy)

Benefits:

• Production-Like Testing: Tests mirror actual deployment architecture
• Security Validation: Proves backends are not externally accessible
• Complete Stack Coverage: Validates proxy routing, pattern execution, driver operation
• No False Positives: Random test data ensures proper validation
• Observability Focus: Debugging via metrics/logs, not direct backend access

Debugging Approach:

# Check proxy health
docker logs prism-proxy

# Verify backend connectivity (from inside container)
docker exec prism-proxy sh -c "nc -zv prism-kafka 9092"

# View metrics endpoint
curl localhost:50091/metrics

# Execute commands in containers
docker exec prism-nats nats server info
docker exec prism-redis redis-cli info

Next: E2E testing with local Vault + Dex for authentication through proxy

---

2025-11-18

Phase 3: Pattern Runner Authentication Integration ✅

Branch: feature/vault-integration-phase2

Summary: Extended authentication support to all three pattern runners (KeyValue, Consumer, Producer). Each pattern runner now supports optional Vault-based dynamic credential management with dual-mode operation (auth enabled/disabled).

Implementation Details:

Consumer Pattern Runner:

• Added SessionManager and service identity authentication
• Implemented initializeAuth() method with full Vault integration
• Updated lifecycle methods (Initialize/Stop) for session management
• Built successfully: 23MB binary
• Example configs: consumer-auth-disabled.yaml, consumer-auth-enabled.yaml

Producer Pattern Runner:

• Refactored to ProducerRunner struct with auth support
• Created RunnerConfig wrapper for auth configuration
• Implemented complete auth lifecycle (Initialize/Start/Stop)
• Built successfully: 28MB binary
• Example configs: producer-auth-disabled.json, producer-auth-enabled.json

KeyValue Pattern Runner (completed earlier):

• Per-request authentication with SessionMiddleware
• gRPC interceptor for JWT validation
• Session-based credential injection
• Example configs: keyvalue-auth-disabled.yaml, keyvalue-auth-enabled.yaml

New Files:

• examples/configs/consumer-auth-disabled.yaml - Consumer without auth
• examples/configs/consumer-auth-enabled.yaml - Consumer with Vault integration
• examples/configs/producer-auth-disabled.json - Producer without auth
• examples/configs/producer-auth-enabled.json - Producer with Vault integration
• docs-cms/memos/memo-091-local-vault-dex-setup.md - Local development setup guide

Modified Files:

• patterns/consumer/cmd/consumer-runner/main.go - Added auth support (320+ lines)
• patterns/consumer/cmd/consumer-runner/go.mod - Added authz dependency
• patterns/producer/cmd/producer-runner/main.go - Complete refactor with auth (330+ lines)
• patterns/producer/go.mod - Added authz dependency
• go.work - Added producer pattern to workspace

Architecture Models:

• KeyValue: Per-request authentication (users send JWT with each request)
• Consumer/Producer: Service identity authentication (single session for service lifetime)

Authentication Flow:

Service Startup
    ↓
initializeAuth() → Create TokenValidator + VaultClient + SessionManager
    ↓
Service obtains JWT (from K8s SA or environment)
    ↓
JWT validated → Exchange for Vault token
    ↓
Fetch dynamic credentials (database/creds/role)
    ↓
Backend connections use dynamic credentials
    ↓
Background renewal every lease_duration/2
    ↓
On shutdown: Revoke credentials via Vault

Features:

• ✅ All 3 patterns support Vault authentication
• ✅ Dual-mode operation (auth enabled/disabled)
• ✅ Dynamic credential fetching and renewal
• ✅ Automatic credential revocation on shutdown
• ✅ Session caching to avoid repeated Vault calls
• ✅ TLS support for Vault connections
• ✅ Configurable session TTL and idle timeout
• ✅ JWT validation with OIDC provider integration
• ✅ Support for K8s and AWS service identities

Local Development Setup:

• MEMO-091 provides complete Docker Compose setup
• Includes Dex (OIDC), Vault (dev mode), Redis, NATS
• Step-by-step configuration and testing guide
• Full end-to-end authentication flow examples

Next: E2E testing with local infrastructure, production operator guide (MEMO-092), troubleshooting guide (MEMO-093)

---

Phase 2: Vault Integration and Session Management ✅

Branch: feature/vault-integration-phase2

Summary: Implemented complete Vault integration for dynamic credential management. The pkg/authz package now provides session lifecycle management with automatic credential renewal, JWT token validation with OIDC providers, and Vault client operations.

Core Components:

Session Management (pkg/authz/session_manager.go):

• CreateSession: JWT → Vault token → Backend credentials
• GetSession: Retrieve active session by ID
• CloseSession: Revoke credentials and clean up
• CleanupExpiredSessions: Background cleanup task
• Session caching with TTL and idle timeout support

Vault Client (pkg/authz/vault_client.go, vault_credentials.go, vault_renewal.go):

• AuthenticateWithJWT: Exchange JWT for Vault token
• GetBackendCredentials: Fetch dynamic credentials from secret paths
• RenewCredentials: Background renewal worker
• RevokeCredentials: Explicit lease revocation
• TLS support with CA cert validation

Token Validation (pkg/authz/token_validator.go):

• OIDC provider integration with JWKS fetching
• JWT signature verification
• Issuer and audience claim validation
• Expiry checking with configurable skip flags

Service Identity (pkg/authz/k8s_auth.go, aws_auth.go):

• Kubernetes service account token authentication
• AWS IAM role authentication
• Automatic service identity detection

Session Middleware (pkg/plugin/session_middleware.go):

• gRPC interceptors (unary and streaming)
• Automatic JWT extraction from metadata
• Session creation and caching
• Credential injection into context
• 32.8% test coverage

New Files:

• pkg/authz/session_manager.go (350+ lines) - Core session lifecycle
• pkg/authz/vault_client.go (280+ lines) - Vault SDK wrapper
• pkg/authz/vault_credentials.go (120+ lines) - Credential operations
• pkg/authz/vault_renewal.go (150+ lines) - Background renewal
• pkg/authz/token_validator.go (180+ lines) - JWT validation
• pkg/authz/k8s_auth.go (90+ lines) - K8s service identity
• pkg/authz/aws_auth.go (85+ lines) - AWS service identity
• pkg/plugin/session_middleware.go (200+ lines) - gRPC interceptors
• docs-cms/memos/memo-083-phase2-vault-integration-plan.md - Implementation plan
• docs-cms/memos/memo-089-session-middleware-integration-guide.md - Integration guide

Security Features:

• ✅ JWT signature verification with JWKS
• ✅ Dynamic credentials from Vault (1h TTL default)
• ✅ Automatic credential renewal (every 30min default)
• ✅ Credential revocation on session end
• ✅ TLS for Vault connections with CA validation
• ✅ Per-session credential isolation
• ✅ Token expiry validation
• ✅ Issuer and audience claim checks

Integration Tests:

• pkg/authz/integration_test.go - Full authentication flow
• Uses Vault testcontainer for realistic testing
• JWT → Vault token → Dynamic credentials
• Currently blocked by Go module dependencies

Next: Pattern runner integration (Phase 3), E2E testing with local Vault + Dex

---

Control Plane RPC Handler (Namespace Management Complete) ✅

Branch: feature/vault-integration-phase2

Summary: Implemented complete namespace creation RPC handler with pattern selection (Layer 3) and backend assignment (Layer 4). Control plane now fully supports unified namespace model.

New Files:

• cmd/prism-admin/pattern_selection.go (126 lines):

  • Layer 3: Pattern selection logic
  • Validates pattern registry (SessionManager, KeyValue, Producer, etc.)
  • Assigns pattern versions and metadata
  • Marks session-aware patterns

• cmd/prism-admin/backend_assignment.go (177 lines):

  • Layer 4: Backend assignment logic
  • Maps slots to backend instances (Redis, Postgres, Kafka, NATS, etc.)
  • Generates connection info and Vault credential paths
  • Default local dev endpoints

• cmd/prism-admin/namespace_handler.go (195 lines):

  • Complete namespace lifecycle (Create, Get, Update, Delete)
  • Unified creation flow: Validate → Pattern Selection → Backend Assignment → Persist
  • Returns NamespaceResponse with assigned patterns and slot bindings
  • Ready for launcher integration

Modified:

• cmd/prism-admin/control_plane.go:
  • CreateNamespace RPC now uses configv1.NamespaceRequest (not old CreateNamespaceRequest)
  • Returns configv1.NamespaceResponse with full assignments
  • Integrated with NamespaceHandler

Complete Pipeline:

Client: NamespaceRequest (protobuf)
    ↓
Control Plane: Validate (business rules)
    ↓
Layer 3: Pattern Selection (choose implementations)
    ↓
Layer 4: Backend Assignment (assign backend instances to slots)
    ↓
Storage: Persist namespace configuration
    ↓
Response: NamespaceResponse (assigned patterns, slot bindings, partition)

Supported Backends:

• Redis (localhost:6379)
• PostgreSQL (localhost:5432)
• Kafka (localhost:9092)
• NATS (localhost:4222)
• SQLite (/tmp/prism.db)
• MemStore (memory://)
• S3/MinIO (localhost:9000)
• ClickHouse (localhost:9000)

Features:

• ✅ Multi-pattern composition
• ✅ Slot-based backend dependencies
• ✅ Vault dynamic credential paths (vault://secret/data/prism/...)
• ✅ Session-aware pattern handling
• ✅ Partition assignment (consistent hashing)
• ✅ Pattern version management
• ✅ Metadata tracking

Next: Integration tests and prism-launcher deployment

---

Protobuf-First YAML Loader (Phase 2 Complete) ✅

Branch: feature/vault-integration-phase2

Summary: Implemented protobuf-first configuration loading where YAML is an import format only, not the source of truth. Protobuf types are canonical.

New Files:

• pkg/config/protobuf_loader.go (240 lines):

  • LoadNamespaceProto: YAML file → protobuf NamespaceRequest
  • ParseNamespaceYAML: YAML bytes → protobuf with validation
  • FormatNamespaceYAML: protobuf → YAML (export/preview)
  • Multi-namespace configuration support

• pkg/config/validation.go (260 lines):

  • Business logic validation (cross-field rules)
  • SessionManager requirements enforcement
  • Session-aware pattern constraints
  • Slot naming conventions ({purpose}-{type})
  • Credential detection (vault:// allowed, static credentials flagged)

Test Coverage:

• pkg/config/protobuf_loader_test.go: 14 test cases, YAML round-trip testing
• pkg/config/validation_test.go: 24 test cases, validation rules
• Total: 38 tests, all passing (0.571s)

Key Features:

• ✅ YAML → JSON → protobuf conversion pipeline
• ✅ Validates all business rules (SessionManager, session-aware, slots)
• ✅ Round-trip support (YAML ↔ protobuf)
• ✅ Multi-namespace config files
• ✅ Static credential detection in session-aware patterns
• ✅ Vault dynamic credential support (vault:// paths)

Benefits:

• Single source of truth: Protobuf (ADR-003)
• YAML as human-friendly import/export format only
• Type-safe construction via protobuf
• Multi-language support (Go, Python, Rust, Java)

Next: Phase 3 - Implement CreateNamespace RPC handler in control plane

---

Protobuf Import Cycle Resolution 🔧

Branch: feature/vault-integration-phase2

Summary: Fixed import cycle between prism and prism.config.v1 packages by moving shared field options to new prism.common package.

Problem: Import cycle prevented compilation:

• prism package (control_plane.proto) imported prism.config.v1 package
• prism.config.v1 imported prism package for field options (prism.validation, prism.required, etc.)
• Go compiler: "import cycle not allowed"

Solution: Created prism.common package for shared annotations:

• Moved proto/prism/options.proto → proto/prism/common/options.proto
• Changed package from prism to prism.common
• Updated all field option references: prism.* → prism.common.*
• Fixed go_package paths: proto/gen → pkg/plugin/gen

Files Modified:

• proto/prism/common/options.proto (new location)
• All proto files updated with correct imports and option references
• examples/client/namespace_client.go (import paths)

Result:

• ✅ All protobuf code compiles without errors
• ✅ No import cycles
• ✅ Example client compiles successfully
• ✅ Generated code in pkg/plugin/gen/prism/ and pkg/plugin/gen/prism/config/v1/

---

Unified Namespace Model with Protobuf 🎯

Branch: feature/vault-integration-phase2

Summary: Established the UNIFIED namespace model where ALL namespaces natively support multi-pattern composition, slot-based backends, and authentication. No "simple" vs "composable" split - just ONE namespace type that does it right.

New Documents:

• MEMO-092: Unified Namespace Model with Protobuf:
  • Protobuf as canonical format (ADR-003, ADR-002)
  • ONE NamespaceRequest type (no backward compat needed - Prism is new)
  • Patterns, slots, auth built into core namespace model
  • YAML/JSON as export/preview format only
  • Client SDK examples (Go, Python, Rust)

Enhanced Proto Files:

• proto/prism/config/v1/namespace_request.proto - Enhanced with patterns, slots, auth (550 lines)
  • Pattern message for multi-pattern composition
  • Slot message for backend dependencies
  • AuthConfig, VaultConfig, JWTConfig for authentication
  • DeploymentPreferences for topology hints
  • NamespaceResponse with assigned patterns and slot bindings
• proto/prism/control_plane.proto - Simplified CreateNamespace RPC

Client Example:

• examples/client/namespace_client.go - Unified namespace construction

Key Improvements:

• Removed unnecessary complexity (no "composable" prefix)
• ONE namespace type that supports everything
• Type-safe construction with protobuf
• Multi-language client SDKs (Go, Python, Rust, Java)
• No schema drift (protobuf is canonical)

Updated Documents:

• MEMO-083 - Added Phase 2 completion status (85% complete, code done)
• MEMO-089 - Fixed broken ADR link

---

2025-11-17

Phase 2 Vault Integration Plan (MEMO-094) 🔐

Branch: feature/vault-integration-phase2

Summary: Detailed 6-week implementation plan for Phase 2 of Prism's authentication system. Builds on Phase 1 (JWT auth, completed) to add HashiCorp Vault integration for per-session, dynamic backend credentials.

New Document:

• MEMO-083: Phase 2 Vault Integration Implementation Plan:
  • Week-by-week implementation breakdown (6 weeks total)
  • Core Vault infrastructure (JWT → Vault token exchange)
  • Credential lifecycle (fetch, renew, revoke)
  • Session management with per-user isolation
  • Service identity authentication (K8s SA, AWS IAM, Azure MI, GCP SA)
  • Integration testing strategy with Vault testcontainer
  • Vault operator setup guide (auth methods, secrets engines, policies)

Key Benefits:

• Per-session credential isolation (each user gets unique backend username)
• Automatic credential rotation (every 1 hour)
• Zero shared credentials (breach of one session doesn't compromise others)
• Per-user audit trails in backend logs (e.g., v-jwt-alice-abc123)

Current State:

• Phase 1 Complete ✅: JWT authentication, namespace authorization, auth context pass-through
• Phase 2 Not Implemented ❌: Vault integration is design-only (MEMO-008), zero code exists

Netflix Video Reference: Database Migrations at Scale

Summary: Added AWS re:Invent 2023 video reference featuring Netflix engineers discussing strategies for safely migrating databases that handle millions of requests per second.

New Document:

• Video: Database Migrations at Millions RPS: Zero-downtime migration patterns, dual-write strategies, and shadow traffic validation

Updates:

• Netflix index page now includes direct links to all three video references

2025-11-16

Documentation Feedback Mechanism

Branch: docs/manual-testing-readme-and-memo-049-fix

Summary: Added documentation feedback mechanism to improve user engagement with docs.

---

Pattern Proxy Integration Tests with Proper Layer Isolation

Branch: feature/namespace-integration-test

Summary: Implemented proper integration tests that validate complete data flow through prism-proxy using pattern-level gRPC APIs. Tests connect to proxy (NOT backends directly), ensuring proper layer isolation and security. All backend services (Kafka, NATS, Redis, PostgreSQL) have no external port mappings - access is exclusively through prism-proxy.

Key Architectural Fix: Previous approach bypassed the proxy and connected tests directly to backends. This violated production architecture where backends are internal-only. New tests properly validate the entire stack: Test Client → Proxy (gRPC) → Pattern Runner → Pattern → Driver → Backend.

Security Model:

• Backend Isolation: No external ports on Kafka (9092), NATS (4222), Redis (6379), PostgreSQL (5432)
• Single Entry Point: Only prism-proxy exposed via localhost:50090 (gRPC), localhost:50091 (metrics)
• Internal Networks: Backends accessible only within Docker network
• Debugging: Use Prometheus metrics and container exec, not direct backend access

Test Architecture:

Test gRPC Client
    ↓
prism-proxy:50090 (ONLY exposed port)
    ↓ routes request
Pattern Runner (internal)
    ↓ executes pattern
Driver (internal)
    ↓ connects to backend
Backend (internal, no external ports)

Test Scenarios:

1. KeyValue Round-Trip with Random Data

• Generate random test data (UUID, timestamp, random int)
• Store via KeyValue.Store() gRPC call to proxy
• Retrieve via KeyValue.Retrieve() gRPC call to proxy
• Validate exact field-by-field match
• Proves: Data integrity through Client → Proxy → Pattern → Redis → Pattern → Proxy → Client

2. Producer/Consumer Message Flow

• Generate unique topic and random message
• Publish via Producer.Publish() with metadata
• Consume via Consumer.Consume() with timeout
• Validate message payload and envelope metadata
• Proves: Message flow through Client → Proxy → Producer → Kafka → Consumer → Proxy → Client

3. Session Context Propagation

• Publish message with session context (user_id, tenant_id, roles)
• Session credentials flow through envelope headers
• Pattern runners can access session for authorization

Test Execution:

# Start complete stack (proxy waits for backends)
docker-compose -f docker-compose.test.yml up -d

# Verify ONLY proxy is accessible
nc -zv localhost 50090  # ✓ Should succeed
nc -zv localhost 4222   # ✗ Should FAIL (NATS internal)
nc -zv localhost 6379   # ✗ Should FAIL (Redis internal)

# Run integration tests
go test -v ./tests/integration/patterns -run TestPatternProxyIntegration

Infrastructure Changes:

• docker-compose.test.yml: Removed all ports: mappings from backends
• Only prism-proxy and prism-admin have external ports
• Healthchecks run inside containers, not from host

New Files:

• tests/integration/patterns/pattern_proxy_integration_test.go (238 lines) - Proxy integration test
• pkg/patterns/common/envelope.go (185 lines) - Universal envelope format
• pkg/patterns/common/audit.go (175 lines) - Audit logging interfaces

Updated Files:

• docker-compose.test.yml - Removed external ports from kafka, nats, redis, postgres, localstack
• tests/integration/patterns/README.md - Updated with proper architecture diagrams and troubleshooting
• tests/integration/patterns/namespace_integration_test.go - Marked as DEPRECATED (bypassed proxy)

Benefits:

• Production-Like Testing: Tests mirror actual deployment architecture
• Security Validation: Proves backends are not externally accessible
• Complete Stack Coverage: Validates proxy routing, pattern execution, driver operation
• No False Positives: Random test data ensures proper validation
• Observability Focus: Debugging via metrics/logs, not direct backend access

Debugging Approach:

# Check proxy health
docker logs prism-proxy

# Verify backend connectivity (from inside container)
docker exec prism-proxy sh -c "nc -zv prism-kafka 9092"

# View metrics endpoint
curl localhost:50091/metrics

# Execute commands in containers
docker exec prism-nats nats server info
docker exec prism-redis redis-cli info

Next: E2E testing with local Vault + Dex for authentication through proxy

---

2025-11-18

Phase 3: Pattern Runner Authentication Integration

Branch: feature/namespace-integration-test

Summary: Extended authentication support to all three pattern runners (KeyValue, Consumer, Producer). Each pattern runner now supports optional Vault-based dynamic credential management with dual-mode operation (auth enabled/disabled).

Implementation Details:

Consumer Pattern Runner:

• Added SessionManager and service identity authentication
• Implemented initializeAuth() method with full Vault integration
• Updated lifecycle methods (Initialize/Stop) for session management
• Built successfully: 23MB binary
• Example configs: consumer-auth-disabled.yaml, consumer-auth-enabled.yaml

Producer Pattern Runner:

• Refactored to ProducerRunner struct with auth support
• Created RunnerConfig wrapper for auth configuration
• Implemented complete auth lifecycle (Initialize/Start/Stop)
• Built successfully: 28MB binary
• Example configs: producer-auth-disabled.json, producer-auth-enabled.json

KeyValue Pattern Runner (completed earlier):

• Per-request authentication with SessionMiddleware
• gRPC interceptor for JWT validation
• Session-based credential injection
• Example configs: keyvalue-auth-disabled.yaml, keyvalue-auth-enabled.yaml

New Files:

• examples/configs/consumer-auth-disabled.yaml - Consumer without auth
• examples/configs/consumer-auth-enabled.yaml - Consumer with Vault integration
• examples/configs/producer-auth-disabled.json - Producer without auth
• examples/configs/producer-auth-enabled.json - Producer with Vault integration
• docs-cms/memos/memo-091-local-vault-dex-setup.md - Local development setup guide

Modified Files:

• patterns/consumer/cmd/consumer-runner/main.go - Added auth support (320+ lines)
• patterns/consumer/cmd/consumer-runner/go.mod - Added authz dependency
• patterns/producer/cmd/producer-runner/main.go - Complete refactor with auth (330+ lines)
• patterns/producer/go.mod - Added authz dependency
• go.work - Added producer pattern to workspace

Architecture Models:

• KeyValue: Per-request authentication (users send JWT with each request)
• Consumer/Producer: Service identity authentication (single session for service lifetime)

Authentication Flow:

Service Startup
    ↓
initializeAuth() → Create TokenValidator + VaultClient + SessionManager
    ↓
Service obtains JWT (from K8s SA or environment)
    ↓
JWT validated → Exchange for Vault token
    ↓
Fetch dynamic credentials (database/creds/role)
    ↓
Backend connections use dynamic credentials
    ↓
Background renewal every lease_duration/2
    ↓
On shutdown: Revoke credentials via Vault

Features:

• ✅ All 3 patterns support Vault authentication
• ✅ Dual-mode operation (auth enabled/disabled)
• ✅ Dynamic credential fetching and renewal
• ✅ Automatic credential revocation on shutdown
• ✅ Session caching to avoid repeated Vault calls
• ✅ TLS support for Vault connections
• ✅ Configurable session TTL and idle timeout
• ✅ JWT validation with OIDC provider integration
• ✅ Support for K8s and AWS service identities

Local Development Setup:

• MEMO-091 provides complete Docker Compose setup
• Includes Dex (OIDC), Vault (dev mode), Redis, NATS
• Step-by-step configuration and testing guide
• Full end-to-end authentication flow examples

Next: E2E testing with local infrastructure, production operator guide (MEMO-092), troubleshooting guide (MEMO-093)

---

Phase 2: Vault Integration and Session Management ✅

Branch: feature/vault-integration-phase2

Summary: Implemented complete Vault integration for dynamic credential management. The pkg/authz package now provides session lifecycle management with automatic credential renewal, JWT token validation with OIDC providers, and Vault client operations.

Core Components:

Session Management (pkg/authz/session_manager.go):

• CreateSession: JWT → Vault token → Backend credentials
• GetSession: Retrieve active session by ID
• CloseSession: Revoke credentials and clean up
• CleanupExpiredSessions: Background cleanup task
• Session caching with TTL and idle timeout support

Vault Client (pkg/authz/vault_client.go, vault_credentials.go, vault_renewal.go):

• AuthenticateWithJWT: Exchange JWT for Vault token
• GetBackendCredentials: Fetch dynamic credentials from secret paths
• RenewCredentials: Background renewal worker
• RevokeCredentials: Explicit lease revocation
• TLS support with CA cert validation

Token Validation (pkg/authz/token_validator.go):

• OIDC provider integration with JWKS fetching
• JWT signature verification
• Issuer and audience claim validation
• Expiry checking with configurable skip flags

Service Identity (pkg/authz/k8s_auth.go, aws_auth.go):

• Kubernetes service account token authentication
• AWS IAM role authentication
• Automatic service identity detection

Session Middleware (pkg/plugin/session_middleware.go):

• gRPC interceptors (unary and streaming)
• Automatic JWT extraction from metadata
• Session creation and caching
• Credential injection into context
• 32.8% test coverage

New Files:

• pkg/authz/session_manager.go (350+ lines) - Core session lifecycle
• pkg/authz/vault_client.go (280+ lines) - Vault SDK wrapper
• pkg/authz/vault_credentials.go (120+ lines) - Credential operations
• pkg/authz/vault_renewal.go (150+ lines) - Background renewal
• pkg/authz/token_validator.go (180+ lines) - JWT validation
• pkg/authz/k8s_auth.go (90+ lines) - K8s service identity
• pkg/authz/aws_auth.go (85+ lines) - AWS service identity
• pkg/plugin/session_middleware.go (200+ lines) - gRPC interceptors
• docs-cms/memos/memo-083-phase2-vault-integration-plan.md - Implementation plan
• docs-cms/memos/memo-089-session-middleware-integration-guide.md - Integration guide

Security Features:

• ✅ JWT signature verification with JWKS
• ✅ Dynamic credentials from Vault (1h TTL default)
• ✅ Automatic credential renewal (every 30min default)
• ✅ Credential revocation on session end
• ✅ TLS for Vault connections with CA validation
• ✅ Per-session credential isolation
• ✅ Token expiry validation
• ✅ Issuer and audience claim checks

Integration Tests:

• pkg/authz/integration_test.go - Full authentication flow
• Uses Vault testcontainer for realistic testing
• JWT → Vault token → Dynamic credentials
• Currently blocked by Go module dependencies

Next: Pattern runner integration (Phase 3), E2E testing with local Vault + Dex

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Control Plane RPC Handler (Namespace Management Complete) ✅

Branch: feature/vault-integration-phase2

Summary: Implemented complete namespace creation RPC handler with pattern selection (Layer 3) and backend assignment (Layer 4). Control plane now fully supports unified namespace model.

New Files:

• cmd/prism-admin/pattern_selection.go (126 lines):

  • Layer 3: Pattern selection logic
  • Validates pattern registry (SessionManager, KeyValue, Producer, etc.)
  • Assigns pattern versions and metadata
  • Marks session-aware patterns

• cmd/prism-admin/backend_assignment.go (177 lines):

  • Layer 4: Backend assignment logic
  • Maps slots to backend instances (Redis, Postgres, Kafka, NATS, etc.)
  • Generates connection info and Vault credential paths
  • Default local dev endpoints

• cmd/prism-admin/namespace_handler.go (195 lines):

  • Complete namespace lifecycle (Create, Get, Update, Delete)
  • Unified creation flow: Validate → Pattern Selection → Backend Assignment → Persist
  • Returns NamespaceResponse with assigned patterns and slot bindings
  • Ready for launcher integration

Modified:

• cmd/prism-admin/control_plane.go:
  • CreateNamespace RPC now uses configv1.NamespaceRequest (not old CreateNamespaceRequest)
  • Returns configv1.NamespaceResponse with full assignments
  • Integrated with NamespaceHandler

Complete Pipeline:

Client: NamespaceRequest (protobuf)
    ↓
Control Plane: Validate (business rules)
    ↓
Layer 3: Pattern Selection (choose implementations)
    ↓
Layer 4: Backend Assignment (assign backend instances to slots)
    ↓
Storage: Persist namespace configuration
    ↓
Response: NamespaceResponse (assigned patterns, slot bindings, partition)

Supported Backends:

• Redis (localhost:6379)
• PostgreSQL (localhost:5432)
• Kafka (localhost:9092)
• NATS (localhost:4222)
• SQLite (/tmp/prism.db)
• MemStore (memory://)
• S3/MinIO (localhost:9000)
• ClickHouse (localhost:9000)

Features:

• ✅ Multi-pattern composition
• ✅ Slot-based backend dependencies
• ✅ Vault dynamic credential paths (vault://secret/data/prism/...)
• ✅ Session-aware pattern handling
• ✅ Partition assignment (consistent hashing)
• ✅ Pattern version management
• ✅ Metadata tracking

Next: Integration tests and prism-launcher deployment

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Protobuf-First YAML Loader (Phase 2 Complete) ✅

Branch: feature/vault-integration-phase2

Summary: Implemented protobuf-first configuration loading where YAML is an import format only, not the source of truth. Protobuf types are canonical.

New Files:

• pkg/config/protobuf_loader.go (240 lines):

  • LoadNamespaceProto: YAML file → protobuf NamespaceRequest
  • ParseNamespaceYAML: YAML bytes → protobuf with validation
  • FormatNamespaceYAML: protobuf → YAML (export/preview)
  • Multi-namespace configuration support

• pkg/config/validation.go (260 lines):

  • Business logic validation (cross-field rules)
  • SessionManager requirements enforcement
  • Session-aware pattern constraints
  • Slot naming conventions ({purpose}-{type})
  • Credential detection (vault:// allowed, static credentials flagged)

Test Coverage:

• pkg/config/protobuf_loader_test.go: 14 test cases, YAML round-trip testing
• pkg/config/validation_test.go: 24 test cases, validation rules
• Total: 38 tests, all passing (0.571s)

Key Features:

• ✅ YAML → JSON → protobuf conversion pipeline
• ✅ Validates all business rules (SessionManager, session-aware, slots)
• ✅ Round-trip support (YAML ↔ protobuf)
• ✅ Multi-namespace config files
• ✅ Static credential detection in session-aware patterns
• ✅ Vault dynamic credential support (vault:// paths)

Benefits:

• Single source of truth: Protobuf (ADR-003)
• YAML as human-friendly import/export format only
• Type-safe construction via protobuf
• Multi-language support (Go, Python, Rust, Java)

Next: Phase 3 - Implement CreateNamespace RPC handler in control plane

---

Protobuf Import Cycle Resolution 🔧

Branch: feature/vault-integration-phase2

Summary: Fixed import cycle between prism and prism.config.v1 packages by moving shared field options to new prism.common package.

Problem: Import cycle prevented compilation:

• prism package (control_plane.proto) imported prism.config.v1 package
• prism.config.v1 imported prism package for field options (prism.validation, prism.required, etc.)
• Go compiler: "import cycle not allowed"

Solution: Created prism.common package for shared annotations:

• Moved proto/prism/options.proto → proto/prism/common/options.proto
• Changed package from prism to prism.common
• Updated all field option references: prism.* → prism.common.*
• Fixed go_package paths: proto/gen → pkg/plugin/gen

Files Modified:

• proto/prism/common/options.proto (new location)
• All proto files updated with correct imports and option references
• examples/client/namespace_client.go (import paths)

Result:

• ✅ All protobuf code compiles without errors
• ✅ No import cycles
• ✅ Example client compiles successfully
• ✅ Generated code in pkg/plugin/gen/prism/ and pkg/plugin/gen/prism/config/v1/

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Unified Namespace Model with Protobuf 🎯

Branch: feature/vault-integration-phase2

Summary: Established the UNIFIED namespace model where ALL namespaces natively support multi-pattern composition, slot-based backends, and authentication. No "simple" vs "composable" split - just ONE namespace type that does it right.

New Documents:

• MEMO-092: Unified Namespace Model with Protobuf:
  • Protobuf as canonical format (ADR-003, ADR-002)
  • ONE NamespaceRequest type (no backward compat needed - Prism is new)
  • Patterns, slots, auth built into core namespace model
  • YAML/JSON as export/preview format only
  • Client SDK examples (Go, Python, Rust)

Enhanced Proto Files:

• proto/prism/config/v1/namespace_request.proto - Enhanced with patterns, slots, auth (550 lines)
  • Pattern message for multi-pattern composition
  • Slot message for backend dependencies
  • AuthConfig, VaultConfig, JWTConfig for authentication
  • DeploymentPreferences for topology hints
  • NamespaceResponse with assigned patterns and slot bindings
• proto/prism/control_plane.proto - Simplified CreateNamespace RPC

Client Example:

• examples/client/namespace_client.go - Unified namespace construction

Key Improvements:

• Removed unnecessary complexity (no "composable" prefix)
• ONE namespace type that supports everything
• Type-safe construction with protobuf
• Multi-language client SDKs (Go, Python, Rust, Java)
• No schema drift (protobuf is canonical)

Updated Documents:

• MEMO-083 - Added Phase 2 completion status (85% complete, code done)
• MEMO-089 - Fixed broken ADR link

---

2025-11-17

Phase 2 Vault Integration Plan (MEMO-083) 🔐

Branch: feature/vault-integration-phase2

Summary: Detailed 6-week implementation plan for Phase 2 of Prism's authentication system. Builds on Phase 1 (JWT auth, completed) to add HashiCorp Vault integration for per-session, dynamic backend credentials.

New Document:

• MEMO-083: Phase 2 Vault Integration Implementation Plan:
  • Week-by-week implementation breakdown (6 weeks total)
  • Core Vault infrastructure (JWT → Vault token exchange)
  • Credential lifecycle (fetch, renew, revoke)
  • Session management with per-user isolation
  • Service identity authentication (K8s SA, AWS IAM, Azure MI, GCP SA)
  • Integration testing strategy with Vault testcontainer
  • Vault operator setup guide (auth methods, secrets engines, policies)

Key Benefits:

• Per-session credential isolation (each user gets unique backend username)
• Automatic credential rotation (every 1 hour)
• Zero shared credentials (breach of one session doesn't compromise others)
• Per-user audit trails in backend logs (e.g., v-jwt-alice-abc123)

Current State:

• Phase 1 Complete ✅: JWT authentication, namespace authorization, auth context pass-through
• Phase 2 Not Implemented ❌: Vault integration is design-only (MEMO-008), zero code exists

Netflix Video Reference: Database Migrations at Scale

Summary: Added AWS re:Invent 2023 video reference featuring Netflix engineers discussing strategies for safely migrating databases that handle millions of requests per second.

New Document:

• Video: Database Migrations at Millions RPS: Zero-downtime migration patterns, dual-write strategies, and shadow traffic validation

Updates:

• Netflix index page now includes direct links to all three video references

2025-11-16

Unified Authentication and Session Management (RFC-062)

Branch: massive-scale-graph-rfcs

Summary: Comprehensive RFC unifying Prism's authentication and session management across human users, service identities, and admin operations.

Key Document:

• RFC-062: Unified Authentication and Session Management

Implementation Status:

• Phase 1 Complete: JWT validation, namespace-based authorization, auth context injection
• Pending: Vault integration, service identity auth, distributed session store

---

Remove Manual Testing Directory

Branch: docs/manual-testing-readme-and-memo-049-fix

Summary: Removed testing/manual/ directory and associated documentation. Manual testing should be performed using actual Prism tooling (prismctl, acceptance tests) rather than standalone bash scripts.

Changes:

• Removed testing/manual/ directory and README
• Updated prism-proxy/TRANSPARENT_PROXY.md to reference automated tests
• Redirected users to proper testing infrastructure

Rationale:

• Manual bash scripts lacked assertions and proper error handling
• Not integrated with CI/CD pipeline
• Duplicated functionality covered by automated tests
• See MEMO-040 for historical context

---

2025-11-15

Massive-Scale Graph RFCs for 100B Vertices

Branch: massive-scale-graph-rfcs

Summary: 5 RFCs defining distributed graph architecture for massive-scale graphs with 100B vertices.

Key RFCs:

• RFC-057: Massive-Scale Graph Sharding
• RFC-058: Multi-Level Graph Indexing
• RFC-059: Hot/Cold Storage Tiers with S3 Snapshots
• RFC-060: Distributed Gremlin Query Execution
• RFC-061: Graph Authorization with Vertex Labels

---

Graph Implementation Readiness Assessment (MEMO-081)

Branch: massive-scale-graph-rfcs

Summary: Readiness assessment identifying 15 critical gaps across 5 implementation phases with 16-20 week timeline.

Key Document: MEMO-081: Graph Implementation Readiness Assessment

---

20-Week Implementation Plan (MEMO-050 through MEMO-080)

Branch: massive-scale-graph-rfcs

Summary: 24 MEMOs documenting 20 weeks of work on massive-scale graph architecture, including production readiness analysis, RFC editing, and production preparation.

---

2025-11-07

ADR-061: Framework-Less Web UI with Go Templates and HTMX

Status: Accepted Supersedes: ADR-028

Summary: Prism adopts a framework-less web UI approach for all web interfaces (Operations Dashboard and Admin UI), eliminating JavaScript build pipelines and framework dependencies. Uses Go templates (server-side rendering) + HTMX (interactivity) + D3.js (visualization) for a fast, simple, maintainable web stack.

Key Decisions:

• Backend: Go HTTP server (not Python/FastAPI)
  • net/http + gorilla/mux + gorilla/websocket
  • Single binary deployment with //go:embed assets
  • 10-100x faster than Python, ~20MB memory footprint
• Frontend: HTMX + D3.js + Mermaid.js (NO React/Vue/Svelte)
  • HTMX: 14KB, replaces React for interactivity
  • D3.js: 70KB, best-in-class visualization
  • Mermaid.js: 200KB, text-to-diagram rendering
  • Total: ~300KB (vs 2-5MB React bundle)
• NO Build Step: No npm, no webpack, instant reload
  • Change template → refresh browser (instant)
  • Download JS libraries via CDN or curl
• Server-Side Rendering: Go html/template (type-safe, auto-escaping)

Benefits:

• ✅ Fast iteration: Instant reload (no build step)
• ✅ Minimal dependencies: 5 total (vs 500+ npm packages)
• ✅ Small bundles: 300KB (vs 2-5MB)
• ✅ Single binary: 15MB executable (includes templates + assets)
• ✅ Language consistency: Go for backend + templates
• ✅ Simple deployment: No Node.js runtime needed

Example (HTMX auto-refresh):

<!-- React: 50+ lines of JavaScript -->
<!-- HTMX: 1 line -->
<div hx-get="/api/health" hx-trigger="load, every 2s" hx-swap="innerHTML">
  Loading...
</div>

Inspired by: HashiCorp internal tools (Consul, Nomad early versions)

Related Documents:

• ADR-061: Framework-Less Web UI
• RFC-050: Operations Dashboard (HUD) - Uses this architecture
• ADR-028: Admin UI with FastAPI and gRPC-Web - Superseded

---

RFC-050: Operations Dashboard (HUD) 📊

Status: Draft

Summary: Comprehensive RFC defining the Prism Operations Dashboard (HUD - Heads-Up Display), a real-time web interface providing unified visibility into proxy health, pattern status, backend connectivity, and system performance. Designed to detect issues before users notice them through proactive monitoring of high-probability failure indicators.

Key Features (8 prioritized views):

1. System Health (99% detection): Overall status, success rate, pattern health grid, critical metrics
2. Performance Monitoring (95% detection): Latency percentiles, throughput, SLO compliance tracking
3. Backend Health (92% detection): Connection pool status, acquisition times, backend-specific metrics
4. Messaging Flow (88% detection): PubSub message delivery, subscriber lag, dropped messages
5. Multi-Tenancy (85% detection): Per-namespace RPS, latency, error rates, traffic distribution
6. Security Monitoring (80% detection): JWT validation, authentication failures, authorization denials
7. Observability Health (75% detection): OpenTelemetry pipeline status, trace coverage
8. System Resources (70% detection): CPU, memory, goroutines per proxy/pattern

Architecture (Framework-less, see ADR-061):

• Backend: Go HTTP server, WebSocket for real-time push (2s updates)
• Frontend: Go templates + HTMX (14KB) + D3.js (70KB) + Mermaid.js (200KB)
• Data Sources: Prometheus metrics, gRPC health checks, Signoz API, Admin API
• Deployment: Single Go binary (15MB with embedded assets), instant reload, NO build step

Technology Stack:

Browser (Go templates + HTMX + D3.js)
    ↕ WebSocket + HTMX
Dashboard (Go :8095)
    ↓ Poll/Query
├─ Proxy /metrics (Prometheus)
├─ Pattern gRPC HealthCheck()
├─ Signoz API (traces/metrics)
└─ Admin API (namespaces)

Hub-and-Spoke Layout:

• Hub: System Health view (always visible) with drill-down capabilities
• Spokes: 7 additional views accessed via tabs/clicks for detailed analysis
• Goal: Single pane of glass for all operational concerns

Success Metrics:

• MTTR reduction: 50% faster issue identification
• Proactive detection: 95% issues caught before user reports
• Developer adoption: 80% daily usage
• Dashboard performance: <2s end-to-end latency (metric → UI)

Implementation Phases (6 weeks):

• Phase 1: MVP (System Health view, WebSocket backend, React frontend)
• Phase 2: Performance & Backend views with Signoz integration
• Phase 3: Messaging & Multi-Tenancy views
• Phase 4: Security & Observability views
• Phase 5: Polish, dark mode, mobile responsive, Docker deployment

Related Documents:

• RFC-050: Operations Dashboard (HUD)
• RFC-016: Local Development Infrastructure - Signoz/Dex integration
• RFC-018: POC Implementation Strategy - POC 1-3 provide metrics
• ADR-048: Local Signoz Observability - OpenTelemetry data source
• ADR-028: Admin UI (FastAPI + Ember) - Admin UI (different from HUD)

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