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chore: release v2.12.0 - flexible instance configuration

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- Bump version from 2.11.3 to 2.12.0
- Add comprehensive documentation for flexible instance configuration
- Update CHANGELOG with new features, security enhancements, and performance improvements
- Document architecture, usage examples, and security considerations
- Include migration guide for existing deployments

This release introduces flexible instance configuration, enabling n8n-mcp to serve
multiple users with different n8n instances dynamically, with full backward compatibility.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
czlonkowski
2025-09-19 21:03:38 +02:00
parent 05eec1cc81
commit b366d40d67
5 changed files with 313 additions and 3 deletions
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docs/CHANGELOG.md
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@@ -7,6 +7,37 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
## [Unreleased]
## [2.12.0] - 2025-09-19
### Added
- **Flexible Instance Configuration**: Complete multi-instance support for serving multiple n8n instances dynamically
- New `InstanceContext` interface for runtime configuration without multi-tenancy implications
- Dual-mode API client supporting both singleton (env vars) and instance-specific configurations
- LRU cache with SHA-256 hashing for secure client management (100 instances, 30-min TTL)
- Comprehensive input validation preventing injection attacks and invalid configurations
- Session context management in HTTP server for per-session instance configuration
- 100% backward compatibility - existing deployments work unchanged
- Full test coverage with 83 new tests covering security, caching, and validation
### Security
- **SHA-256 Cache Key Hashing**: All instance identifiers are hashed before caching
- **Input Validation**: Comprehensive validation for URLs, API keys, and numeric parameters
- **Secure Logging**: Sensitive data never logged, only partial hashes for debugging
- **Memory Management**: LRU eviction and TTL prevent unbounded growth
- **URL Validation**: Blocks dangerous protocols (file://, javascript://, etc.)
### Performance
- **Efficient Caching**: LRU cache with automatic cleanup reduces API client creation
- **Fast Lookups**: SHA-256 hashed keys for O(1) cache access
- **Memory Optimized**: Maximum 100 concurrent instances with 30-minute TTL
- **Token Savings**: Reuses existing clients instead of recreating
### Documentation
- Added comprehensive [Flexible Instance Configuration Guide](./FLEXIBLE_INSTANCE_CONFIGURATION.md)
- Detailed architecture, usage examples, and security considerations
- Migration guide for existing deployments
- Complete API documentation for InstanceContext
## [2.11.3] - 2025-09-17
### Fixed
@@ -1319,6 +1350,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
- Basic n8n and MCP integration
- Core workflow automation features
[2.12.0]: https://github.com/czlonkowski/n8n-mcp/compare/v2.11.3...v2.12.0
[2.11.3]: https://github.com/czlonkowski/n8n-mcp/compare/v2.11.2...v2.11.3
[2.11.2]: https://github.com/czlonkowski/n8n-mcp/compare/v2.11.1...v2.11.2
[2.11.1]: https://github.com/czlonkowski/n8n-mcp/compare/v2.11.0...v2.11.1
[2.11.0]: https://github.com/czlonkowski/n8n-mcp/compare/v2.10.9...v2.11.0