Version History

Complete release history and version comparison for MCP Server with LangGraph

Current Version

Latest Release: v2.8.0 (2025-10-22) Highlights: Test Coverage +35% (85%+ overall), Docker-based integration testing infrastructure, 61 new comprehensive test cases

Version Comparison Matrix

Feature	v2.8	v2.7	v2.6	v2.5	v2.4	v2.3	v2.2	v2.1
Authentication & Sessions
Keycloak SSO Integration	✅	✅	✅	✅	✅	✅	✅	✅
Redis Session Management	✅	✅	✅	✅	✅	✅	✅	✅
Session Store Architecture	✅	✅	✅	✅	✅	✅	✅	✅
Provider Pattern	✅	✅	✅	✅	✅	✅	✅	✅
Compliance & Security
GDPR Data Subject Rights	✅	✅	✅	✅	✅	✅	✅	❌
SOC 2 Automation	✅	✅	✅	✅	✅	✅	✅	❌
HIPAA Technical Safeguards	✅	✅	✅	✅	✅	✅	✅	❌
SLA Monitoring (99.9%)	✅	✅	✅	✅	✅	✅	✅	❌
Data Retention Policies	✅	✅	✅	✅	✅	✅	✅	❌
Compliance Storage Backend	✅	✅	✅	✅	✅	✅	❌	❌
Testing & Quality
Unit Tests (498+)	✅	✅	✅	✅	✅	✅	✅	✅
Integration Tests	✅	✅	✅	✅	✅	✅	✅	✅
Docker Integration Tests	✅	✅	✅	✅	❌	❌	❌	❌
100% Test Pass Rate	✅	✅	✅	✅	✅	❌	❌	❌
Property-Based Testing	✅	✅	✅	✅	✅	✅	✅	✅
Contract Testing	✅	✅	✅	✅	✅	✅	✅	✅
Test Coverage	85%+	~75%	~75%	~75%	~75%	~75%	~75%	~75%
Documentation
Mintlify Docs	✅	✅	✅	✅	✅	✅	✅	✅
Architecture Decision Records	30 ADRs	30 ADRs	26 ADRs	21 ADRs	21 ADRs	21 ADRs	5 ADRs	5 ADRs
Core Features
LangGraph Version	0.6.10	0.6.10	0.6.10	0.6.10	0.6.10	0.2.28	0.2.28	0.2.28
Multi-LLM Support (LiteLLM)	✅	✅	✅	✅	✅	✅	✅	✅
OpenFGA Authorization	✅	✅	✅	✅	✅	✅	✅	✅
Pydantic Version	V2	V2	V2	V2	V2	V2	V1	V1
Type Safety Coverage	64%	64%	64%	64%	64%	64%	27%	27%
Agentic Loop (GAVR)	✅	✅	❌	❌	❌	❌	❌	❌
Anthropic Best Practices	9.8/10	9.8/10	❌	❌	❌	❌	❌	❌
Secrets Management
Infisical Integration	✅	✅	✅	✅	✅	✅	✅	✅
Infisical Docker Builds	✅	✅	✅	✅	❌	❌	❌	❌
5 Installation Options	✅	✅	✅	✅	❌	❌	❌	❌
Deployment
Kubernetes/Helm/Kustomize	✅	✅	✅	✅	✅	✅	✅	✅
Multi-Cloud (GKE/EKS/AKS)	✅	✅	✅	✅	✅	✅	✅	✅
Docker Compose	✅	✅	✅	✅	✅	✅	✅	✅
Observability
OpenTelemetry + LangSmith	✅	✅	✅	✅	✅	✅	✅	✅
Grafana Dashboards	9	9	9	9	9	9	9	7
Prometheus Alerts	20+ SLA	20+ SLA	20+ SLA	20+ SLA	20+ SLA	20+ SLA	20+ SLA	Basic

Release Highlights

v2.8.0 - Test Coverage Boost

Test coverage +35% (85%+) + Infrastructure improvements

v2.7.0 - Agentic AI Ready

Agentic loop + Anthropic best practices (9.8/10)

v2.6.0 - CI/CD Hardening

CI/CD fixes + Documentation improvements

v2.5.0 - Integration Testing

Docker integration tests + Infisical builds

v2.4.0 - LangGraph Upgrade

LangGraph 0.6.10 + 100% test pass rate

v2.3.0 - Type Safety

Storage backend + Pydantic V2

v2.2.0 - Enterprise Compliance

GDPR/SOC2/HIPAA compliance automation

v2.1.0 - Production Ready

Keycloak SSO + Production hardening

v2.0.0 - Major Restructure

Package reorganization (breaking)

Version Timeline

Migration Guides

v2.7.0 → v2.8.0 (Latest)

Breaking Changes: None

New Features:

• Test coverage improvements (+35% overall, now 85%+)
• Docker Compose test environment (Qdrant, Redis, PostgreSQL)
• 61 new comprehensive test cases
• 25 previously-skipped tests now enabled

Recommended Actions:

1. Update dependencies: uv sync
2. Run tests with new Docker infrastructure: make test-integration
3. Review new test coverage reports
4. Update CI/CD to use Docker Compose test environment

v2.3.0 → v2.4.0

Breaking Changes: None

New Features:

• LangGraph 0.6.10 (API compatible)
• 100% test pass rate (437/437)
• 21 comprehensive ADRs

Recommended Actions:

1. Update dependencies: uv sync
2. Run tests: make test
3. Review new ADRs for architectural guidance

v2.2.0 → v2.3.0

Breaking Changes: None (Pydantic V2 backward compatible)

New Features:

• Compliance storage backend (5 interfaces)
• Pydantic V2 migration
• Type safety enhanced (27% → 64%)

Recommended Actions:

1. Review Pydantic V2 changes if extending models
2. Run type checks: mypy src/
3. Test compliance storage integration

v2.1.0 → v2.2.0

Breaking Changes: None

New Features:

• GDPR/SOC2/HIPAA compliance automation
• SLA monitoring with 20+ Prometheus alerts
• 2 new Grafana dashboards

Recommended Actions:

1. Configure compliance settings in .env
2. Import new Grafana dashboards
3. Review Prometheus alert rules
4. Set up data retention policies

v2.0.0 → v2.1.0

Breaking Changes: None (v2.0.0 was the breaking change)

New Features:

• Keycloak SSO integration
• Redis session management
• Kubernetes/Helm deployment infrastructure
• 43 MDX documentation files

Recommended Actions:

1. Set up Keycloak if using SSO: make setup-keycloak
2. Configure Redis for sessions
3. Review Kubernetes deployment guides

v1.x → v2.0.0

Breaking Changes: ⚠️ Major package reorganization

Import Path Changes:

# Before (v1.x)
from config import settings
from auth import AuthMiddleware

# After (v2.x)
from mcp_server_langgraph.core.config import settings
from mcp_server_langgraph.auth.middleware import AuthMiddleware

Recommended Actions:

1. Update all imports to new structure
2. Review migration guide in CHANGELOG
3. Update CI/CD pipelines
4. Test thoroughly before deploying

Deprecation Schedule

Feature	Deprecated In	Removed In	Alternative
HTTP/SSE Transport	v2.0.0	v2.0.0	StreamableHTTP transport
Pydantic V1	v2.3.0	v3.0.0	Pydantic V2 models

Semantic Versioning

This project follows Semantic Versioning 2.0.0:

• MAJOR (v2.x.x): Breaking changes (import paths, API changes)
• MINOR (vx.Y.x): New features (backward compatible)
• PATCH (vx.x.Z): Bug fixes (backward compatible)

Support Policy

Version	Status	Support Until	Security Fixes
v2.8.x	Current	Active	✅ Yes
v2.7.x	Maintenance	2026-04-22	✅ Yes
v2.6.x	Maintenance	2026-01-17	✅ Yes
v2.5.x	End of Life	2025-10-20	❌ No
v2.4.x	End of Life	2025-10-14	❌ No
v2.3.x	End of Life	2025-04-13	❌ No
v2.2.x	End of Life	2025-04-13	❌ No
v2.1.x	End of Life	2025-04-12	❌ No
v2.0.x	End of Life	2025-02-11	❌ No
v1.x	End of Life	2025-01-10	❌ No

Getting Help

CHANGELOG

Detailed release notes

GitHub Releases

Download specific versions

Discussions

Community support

Issues

Report bugs