langchain.com

2 articles in the TruthFoundry index. Each links out to the original.

• Fireworks partners to build cheap, general-purpose AI trace judge · Fireworks and researchers fine-tune a Qwen model to detect perceived errors in AI agent traces at 10-100x lower cost.
• LangSmith Introduces Preview Builds for Agent Testing · LangSmith launches Preview Builds to allow teams to test agent changes in isolated staging environments before merging.