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Nexus 0.5.1

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@github-actions github-actions released this 19 Sep 19:09
· 84 commits to main since this release
0.5.1
88cbc45

Nexus 0.5.1 - September 19, 2025

Summary

This release enhances the telemetry capabilities with advanced OTLP (OpenTelemetry Protocol) exporter configuration, adds support for OpenAI Codex CLI for the Anthropic protocl, improves logging with UTC timestamps, and includes dependency updates for improved security and performance.

New Features

Enhanced OTLP Telemetry Support

User Impact: Users can now configure OTLP exporters with TLS support for secure telemetry data transmission and custom headers for authentication with observability platforms.

Technical Details:

  • Added TLS configuration support for gRPC OTLP exporters
  • Implemented custom header support for both gRPC and HTTP OTLP protocols
  • Files modified: crates/config/src/telemetry/exporters.rs, crates/telemetry/src/metadata.rs
  • New configuration options:
    • telemetry.exporters.otlp.grpc.tls.domain_name - SNI domain for TLS verification
    • telemetry.exporters.otlp.grpc.tls.ca_certificate - Custom CA certificate path
    • telemetry.exporters.otlp.grpc.tls.client_certificate - Client certificate for mTLS
    • telemetry.exporters.otlp.grpc.tls.client_key - Client private key for mTLS
    • telemetry.exporters.otlp.grpc.headers - Custom gRPC metadata headers
    • telemetry.exporters.otlp.http.headers - Custom HTTP headers

OpenAI Codex CLI Support

User Impact: Users can now use the OpenAI Codex CLI with Nexus. The provider fully supports OpenAI-compatible formats including function calling and tool usage, enabling seamless integration with the Codex CLI and other OpenAI-compatible tools.

Technical Details:

  • Added support for function calling and tool use, e.g. fixed a few bugs so Anthrpic provider works well with Codex.
  • Files modified: crates/llm/src/provider/anthropic/input.rs, crates/llm/src/messages/unified.rs

Enhancements/Improvements

Improved Logging with UTC Timestamps

User Impact: All log timestamps are now consistently formatted in UTC with microsecond precision, making it easier to correlate logs across distributed systems and time zones.

Technical Details:

  • Replaced local timezone logging with UTC timestamps
  • Added microsecond precision to timestamps (format: YYYY-MM-DDTHH:MM:SS.ffffffZ)
  • Files modified: crates/server/src/logger.rs, crates/telemetry/src/logs.rs
  • Removed legacy logger implementation from nexus/src/logger.rs
  • Improved terminal detection for color output control

Infrastructure/DevOps Changes

Dependency Updates

User Impact: Improved security and performance through updated dependencies.

Technical Details:

  • Updated anyhow from 1.0.99 to 1.0.100 - Enhanced error handling
  • Updated rustls from 0.23.31 to 0.23.32 - Security improvements for TLS
  • Updated various transitive dependencies in Cargo.lock

Deployment Notes

Configuration Changes

For users upgrading from 0.5.0, the following new configuration options are available but not required:

# OTLP TLS Configuration (optional)
[telemetry.exporters.otlp.grpc.tls]
domain_name = "telemetry.example.com"
ca_certificate = "/path/to/ca.pem"
client_certificate = "/path/to/client.pem"
client_key = "/path/to/client.key"

# OTLP Headers (optional)
[telemetry.exporters.otlp.grpc.headers]
authorization = "Bearer your-token"
x-custom-header = "value"

Breaking Changes

None - this release maintains full backward compatibility with 0.5.0.

Migration Steps

No migration required. The new features are opt-in and existing configurations will continue to work without modification.

Performance Considerations

  • TLS configuration for OTLP may add slight latency to telemetry exports but improves security
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