LangSmith Launches Preview Builds: Spin Up Temporary Deployments to Test Agents from PRs
LangChain · x · 2026-08-21
LangSmith Deployment's Preview Builds are now in public beta. When a pull request triggers a build, LangSmith automatically deploys the PR branch into an isolated, production-like environment linked to the parent deployment—without touching the parent itself.
The point: teams no longer need a separate deployment per PR, and reviewers don't need to clone the repo or reproduce local setups. Everyone tests the same agent version in the same environment—trying prompts, exercising tool calls, inspecting traces, and checking edge cases—then merges once behavior looks right. Previews are short-lived and tear down automatically after merge. Works for changes to prompts, tools, models, dependencies, and integrations.
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