--- title: "langsmith Breaking Changes on npm | Since.dev" description: "What each langsmith release removed, renamed or changed: 114 breaking changes in 26 versions on npm, each with its source." canonical_url: https://since.dev/packages/npm/langsmith last_updated: 2026-04-30 --- # langsmith breaking changes Every breaking API change we have recorded in langsmith on npm: 114 breaking changes in 26 versions. Below are its newest 6 versions, removals and renames first, each with its source. Newest change April 30, 2026 ## 0.6.0 2 breaking changes, first published April 30, 2026. - **Signature changed** `Client._pullPrompt` Was \_pullPrompt(promptIdentifier: string, options?: {includeModel?: boolean; skipCache?: boolean;}): Promise; now \_pullPrompt(promptIdentifier: string, options?: {includeModel?: boolean; skipCache?: boolean... [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.6.0) - **Signature changed** `Client.pullPromptCommit` Was pullPromptCommit(promptIdentifier: string, options?: {includeModel?: boolean; skipCache?: boolean;}): Promise; now pullPromptCommit(promptIdentifier: string, options?: {includeModel?: boolean; skipCache?: boolean... [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.6.0) ## 0.5.22 33 breaking changes, first published April 22, 2026. - **Removed** `experimental/sandbox:CaptureSnapshotOptions.checkpoint` CaptureSnapshotOptions.checkpoint was removed in langsmith 0.5.22 [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.22) - **Removed** `experimental/sandbox:CreatePoolOptions` CreatePoolOptions was removed in langsmith 0.5.22 [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.22) - **Removed** `experimental/sandbox:CreateSandboxOptions.snapshotId` CreateSandboxOptions.snapshotId was removed in langsmith 0.5.22 [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.22) - **Removed** `experimental/sandbox:CreateTemplateOptions` CreateTemplateOptions was removed in langsmith 0.5.22 [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.22) - **Removed** `experimental/sandbox:CreateVolumeOptions` CreateVolumeOptions was removed in langsmith 0.5.22 [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.22) - **Removed** `experimental/sandbox:Pool` Pool was removed in langsmith 0.5.22 [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.22) - **Removed** `experimental/sandbox:ResourceSpec` ResourceSpec was removed in langsmith 0.5.22 [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.22) - **Removed** `experimental/sandbox:Sandbox.template_name` Sandbox.template_name was removed in langsmith 0.5.22 [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.22) - **Removed** `experimental/sandbox:SandboxClient.createPool` SandboxClient.createPool was removed in langsmith 0.5.22 [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.22) - **Removed** `experimental/sandbox:SandboxClient.createTemplate` SandboxClient.createTemplate was removed in langsmith 0.5.22 [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.22) And 23 more in this version. ## 0.5.20 7 breaking changes, first published April 15, 2026. - **Signature changed** `experimental/sandbox:Sandbox.dataplane_url` Was readonly dataplane_url?: string; now dataplane_url?: string. [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.20) - **Signature changed** `experimental/sandbox:Sandbox.status` Was readonly status?: string; now status?: string. [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.20) - **Signature changed** `experimental/sandbox:Sandbox.template_name` Was readonly template_name: string; now readonly template_name?: string. [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.20) - **Signature changed** `experimental/sandbox:SandboxClient.createSandbox` Was createSandbox(templateName: string, options?: CreateSandboxOptions): Promise; now createSandbox(templateName?: string, options?: CreateSandboxOptions): Promise. [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.20) - **Signature changed** `experimental/sandbox:SandboxClient.getSandbox` Was getSandbox(name: string): Promise; now getSandbox(name: string, options?: {signal?: AbortSignal;}): Promise. [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.20) - **Signature changed** `experimental/sandbox:SandboxClient.getSandboxStatus` Was getSandboxStatus(name: string): Promise; now getSandboxStatus(name: string, options?: {signal?: AbortSignal;}): Promise. [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.20) - **Signature changed** `experimental/sandbox:SandboxData.template_name` Was template_name: string; now template_name?: string. [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.20) ## 0.5.17 5 breaking changes, first published April 8, 2026. - **Removed** `Client.indexDataset` Client.indexDataset was removed in langsmith 0.5.17 [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.17) - **Removed** `Client.similarExamples` Client.similarExamples was removed in langsmith 0.5.17 [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.17) - **Removed** `schemas:ExampleSearch` ExampleSearch was removed in langsmith 0.5.17 [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.17) - **Signature changed** `Client.createCommit` Was createCommit(promptIdentifier: string, object: any, options?: {parentCommitHash?: string;}): Promise; now createCommit(promptIdentifier: string, object: any, options?: {parentCommitHash?: string; description?: string;})... [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.17) - **Signature changed** `Client.pushPrompt` Was pushPrompt(promptIdentifier: string, options?: {object?: any; parentCommitHash?: string; isPublic?: boolean; description?: string; readme?: string; tags?: string\[\];}): Promise; now pushPrompt(promptIdentifier: string, options?... [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.17) ## 0.5.13 2 breaking changes, first published March 23, 2026. - **Signature changed** `experimental/vercel:AggregatedDoStreamOutput` Was type AggregatedDoStreamOutput = {content: string; role: "assistant"; tool_calls: {id: string; type: "function"; function: {name: string; arguments: string;};}\[\]; providerMetadata?: SharedV2ProviderMetadata; finishReason?... [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.13) - **Signature changed** `experimental/vercel:AggregatedDoStreamOutput.content` Was content: string; now content: (StandardReasoningBlock | StandardTextBlock)\[\]. [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.13) ## 0.5.10 1 breaking change, first published March 12, 2026. - **Signature changed** `experimental/sandbox:Sandbox.run` Was run(command: string, options?: RunOptions): Promise; now run(command: string, options: RunOptions & {wait: false;}): Promise run(command: string, options?: RunOptions & {wait?: true;})... [npmjs.com](https://www.npmjs.com/package/langsmith/v/0.5.10) ## Check your code These are the changes. To see which of them reach your code, [scan a public repository](https://since.dev/scan.md), or have your coding agent call `check_code` with your manifest or lockfile over [MCP](https://since.dev/docs.md#mcp). [The API](https://since.dev/docs.md#api) reads every change in every version, not only the newest. On Team and up, a fix pull request opens for the changes that reach a connected repository. Nothing merges or deploys. ## Put your code on continuous management. Scan a public repository now, or give your agent one line. ### See how out of date your code is. [Scan a repository](https://since.dev/scan.md). Any public GitHub repository. No sign-in. ### Tell your agent what changed since it was trained. `claude mcp add --transport http since https://api.since.dev/mcp` --- Every page on this site as Markdown: https://since.dev/sitemap.md. For agents: https://since.dev/llms.txt.