Newsletter June 2026: LangChain Newsletter
Integrate the On‑Call Copilot template to automate alert triage.
Integrate the On‑Call Copilot template to automate alert triage.
Summary
The June 25, 2026 LangChain newsletter highlights several new LangSmith features. The On‑Call Copilot template automates alert triage by working through code, traces, and runbooks to draft updates. Fleet agents can now use an isolated virtual computer for code, files, and authenticated API calls. A new UI for Voice Traces adds an inline audio player, making audio debugging faster. Experiment Status Tracking shows live progress for experiments started from the LangSmith UI or SDK. Native Slack integration sends Engine issue notifications to Slack. Deep Agents now include RubricMiddleware for self‑evaluation, and Programmatic Subagents allow dispatching subagents from interpreter code. The newsletter also features a walkthrough of the Agent Development Lifecycle (ADLC) and upcoming events in Chicago, Berlin, Washington DC, and Las Vegas.
These updates collectively enhance agent development, debugging, and monitoring, providing developers with more tools to build, test, and deploy agents at scale.
Key changes
- On‑Call Copilot template for alert triage
- Fleet agents can use isolated virtual computers
- New UI for Voice Traces with inline audio player
- Experiment Status Tracking in UI/SDK
- Native Slack integration for Engine issues
- Deep Agents RubricMiddleware for self‑evaluation
- Programmatic Subagents dispatch
- Walkthrough of ADLC