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This PR was opened by the [Changesets release](https://github.com/changesets/action) GitHub action. When you're ready to do a release, you can merge this and the packages will be published to npm automatically. If you're not ready to do a release yet, that's fine, whenever you add more changesets to main, this PR will be updated. # Releases ## @langchain/langgraph-api@1.2.5 ### Patch Changes - [`658a076`](https://github.com/langchain-ai/langgraphjs/commit/658a076d5b50af9f5b96ab99f26ed629da6e182f) Thanks [@christian-bromann](https://github.com/christian-bromann)! - fix(langgraph): forward named custom stream channels consistently Forward remote `StreamChannel` emissions as `custom:<name>` protocol events and normalize them back to custom-channel payloads in the API session. This aligns JavaScript stream-channel forwarding with the protocol subscription shape used by remote clients, so `custom:<name>` subscriptions receive extension channel data consistently. - Updated dependencies \[]: - @langchain/langgraph-ui@1.2.5 ## @langchain/langgraph-cli@1.2.5 ### Patch Changes - Updated dependencies \[[`658a076`](https://github.com/langchain-ai/langgraphjs/commit/658a076d5b50af9f5b96ab99f26ed629da6e182f)]: - @langchain/langgraph-api@1.2.5 ## @langchain/langgraph@1.3.6 ### Patch Changes - [`658a076`](https://github.com/langchain-ai/langgraphjs/commit/658a076d5b50af9f5b96ab99f26ed629da6e182f) Thanks [@christian-bromann](https://github.com/christian-bromann)! - fix(langgraph): forward named custom stream channels consistently Forward remote `StreamChannel` emissions as `custom:<name>` protocol events and normalize them back to custom-channel payloads in the API session. This aligns JavaScript stream-channel forwarding with the protocol subscription shape used by remote clients, so `custom:<name>` subscriptions receive extension channel data consistently. - Updated dependencies \[[`0a0e04e`](https://github.com/langchain-ai/langgraphjs/commit/0a0e04e9ff7e82fd08411cc0094e1f94729a1e1e), [`658a076`](https://github.com/langchain-ai/langgraphjs/commit/658a076d5b50af9f5b96ab99f26ed629da6e182f), [`a9aa8d6`](https://github.com/langchain-ai/langgraphjs/commit/a9aa8d6a9b23f5f7d4c56889fa68697b1e076b31)]: - @langchain/langgraph-sdk@1.9.17 ## @langchain/langgraph-sdk@1.9.17 ### Patch Changes - [#2494](https://github.com/langchain-ai/langgraphjs/pull/2494) [`0a0e04e`](https://github.com/langchain-ai/langgraphjs/commit/0a0e04e9ff7e82fd08411cc0094e1f94729a1e1e) Thanks [@christian-bromann](https://github.com/christian-bromann)! - fix(sdk): revive automatic optimistic submit echo Echo `submit()` input into `values` / `messages` immediately with client-side id minting and id-based reconciliation as the server streams back. Expose per-message `optimisticStatus` via message metadata (`pending` → `sent` / `failed`), shallow-merge non-message keys with rollback when no `values` arrive, and add an `optimistic: false` hook opt-out. Plumb through React, Vue, Svelte, and Angular with browser e2e coverage. - [`658a076`](https://github.com/langchain-ai/langgraphjs/commit/658a076d5b50af9f5b96ab99f26ed629da6e182f) Thanks [@christian-bromann](https://github.com/christian-bromann)! - fix(sdk): coalesce duplicate thread read requests Coalesce concurrent identical `threads.getState()` and `threads.getHistory()` reads within the SDK client so transient remounts do not issue duplicate hydrate requests. Request identity includes the prepared URL, body, method, and headers, and coalescing is skipped for caller-provided abort signals, raw response reads, and `onRequest` hooks to preserve auth and cancellation isolation. - [#2497](https://github.com/langchain-ai/langgraphjs/pull/2497) [`a9aa8d6`](https://github.com/langchain-ai/langgraphjs/commit/a9aa8d6a9b23f5f7d4c56889fa68697b1e076b31) Thanks [@christian-bromann](https://github.com/christian-bromann)! - fix(sdk): reconcile subagents and subgraphs on thread reconnect Seed deep-agent subagent cards from checkpoint messages and subgraph hosts from a single bounded `getHistory` read during `hydrate()`, so parallel fan-out discovery reappears immediately on refresh instead of waiting for SSE replay. Subagent execution namespaces are promoted through the existing guarded discovery state machine (bulk at hydrate, lazily per opened card via the selector layer). The getHistory cost is O(1) in requests regardless of fan-out width. ## @langchain/angular@1.0.17 ### Patch Changes - [#2494](https://github.com/langchain-ai/langgraphjs/pull/2494) [`0a0e04e`](https://github.com/langchain-ai/langgraphjs/commit/0a0e04e9ff7e82fd08411cc0094e1f94729a1e1e) Thanks [@christian-bromann](https://github.com/christian-bromann)! - fix(sdk): revive automatic optimistic submit echo Echo `submit()` input into `values` / `messages` immediately with client-side id minting and id-based reconciliation as the server streams back. Expose per-message `optimisticStatus` via message metadata (`pending` → `sent` / `failed`), shallow-merge non-message keys with rollback when no `values` arrive, and add an `optimistic: false` hook opt-out. Plumb through React, Vue, Svelte, and Angular with browser e2e coverage. - [#2497](https://github.com/langchain-ai/langgraphjs/pull/2497) [`a9aa8d6`](https://github.com/langchain-ai/langgraphjs/commit/a9aa8d6a9b23f5f7d4c56889fa68697b1e076b31) Thanks [@christian-bromann](https://github.com/christian-bromann)! - fix(sdk): reconcile subagents and subgraphs on thread reconnect Seed deep-agent subagent cards from checkpoint messages and subgraph hosts from a single bounded `getHistory` read during `hydrate()`, so parallel fan-out discovery reappears immediately on refresh instead of waiting for SSE replay. Subagent execution namespaces are promoted through the existing guarded discovery state machine (bulk at hydrate, lazily per opened card via the selector layer). The getHistory cost is O(1) in requests regardless of fan-out width. - Updated dependencies \[[`0a0e04e`](https://github.com/langchain-ai/langgraphjs/commit/0a0e04e9ff7e82fd08411cc0094e1f94729a1e1e), [`658a076`](https://github.com/langchain-ai/langgraphjs/commit/658a076d5b50af9f5b96ab99f26ed629da6e182f), [`a9aa8d6`](https://github.com/langchain-ai/langgraphjs/commit/a9aa8d6a9b23f5f7d4c56889fa68697b1e076b31)]: - @langchain/langgraph-sdk@1.9.17 ## @langchain/react@1.0.17 ### Patch Changes - [#2494](https://github.com/langchain-ai/langgraphjs/pull/2494) [`0a0e04e`](https://github.com/langchain-ai/langgraphjs/commit/0a0e04e9ff7e82fd08411cc0094e1f94729a1e1e) Thanks [@christian-bromann](https://github.com/christian-bromann)! - fix(sdk): revive automatic optimistic submit echo Echo `submit()` input into `values` / `messages` immediately with client-side id minting and id-based reconciliation as the server streams back. Expose per-message `optimisticStatus` via message metadata (`pending` → `sent` / `failed`), shallow-merge non-message keys with rollback when no `values` arrive, and add an `optimistic: false` hook opt-out. Plumb through React, Vue, Svelte, and Angular with browser e2e coverage. - [#2497](https://github.com/langchain-ai/langgraphjs/pull/2497) [`a9aa8d6`](https://github.com/langchain-ai/langgraphjs/commit/a9aa8d6a9b23f5f7d4c56889fa68697b1e076b31) Thanks [@christian-bromann](https://github.com/christian-bromann)! - fix(sdk): reconcile subagents and subgraphs on thread reconnect Seed deep-agent subagent cards from checkpoint messages and subgraph hosts from a single bounded `getHistory` read during `hydrate()`, so parallel fan-out discovery reappears immediately on refresh instead of waiting for SSE replay. Subagent execution namespaces are promoted through the existing guarded discovery state machine (bulk at hydrate, lazily per opened card via the selector layer). The getHistory cost is O(1) in requests regardless of fan-out width. - Updated dependencies \[[`0a0e04e`](https://github.com/langchain-ai/langgraphjs/commit/0a0e04e9ff7e82fd08411cc0094e1f94729a1e1e), [`658a076`](https://github.com/langchain-ai/langgraphjs/commit/658a076d5b50af9f5b96ab99f26ed629da6e182f), [`a9aa8d6`](https://github.com/langchain-ai/langgraphjs/commit/a9aa8d6a9b23f5f7d4c56889fa68697b1e076b31)]: - @langchain/langgraph-sdk@1.9.17 ## @langchain/svelte@1.0.17 ### Patch Changes - [#2494](https://github.com/langchain-ai/langgraphjs/pull/2494) [`0a0e04e`](https://github.com/langchain-ai/langgraphjs/commit/0a0e04e9ff7e82fd08411cc0094e1f94729a1e1e) Thanks [@christian-bromann](https://github.com/christian-bromann)! - fix(sdk): revive automatic optimistic submit echo Echo `submit()` input into `values` / `messages` immediately with client-side id minting and id-based reconciliation as the server streams back. Expose per-message `optimisticStatus` via message metadata (`pending` → `sent` / `failed`), shallow-merge non-message keys with rollback when no `values` arrive, and add an `optimistic: false` hook opt-out. Plumb through React, Vue, Svelte, and Angular with browser e2e coverage. - [#2497](https://github.com/langchain-ai/langgraphjs/pull/2497) [`a9aa8d6`](https://github.com/langchain-ai/langgraphjs/commit/a9aa8d6a9b23f5f7d4c56889fa68697b1e076b31) Thanks [@christian-bromann](https://github.com/christian-bromann)! - fix(sdk): reconcile subagents and subgraphs on thread reconnect Seed deep-agent subagent cards from checkpoint messages and subgraph hosts from a single bounded `getHistory` read during `hydrate()`, so parallel fan-out discovery reappears immediately on refresh instead of waiting for SSE replay. Subagent execution namespaces are promoted through the existing guarded discovery state machine (bulk at hydrate, lazily per opened card via the selector layer). The getHistory cost is O(1) in requests regardless of fan-out width. - Updated dependencies \[[`0a0e04e`](https://github.com/langchain-ai/langgraphjs/commit/0a0e04e9ff7e82fd08411cc0094e1f94729a1e1e), [`658a076`](https://github.com/langchain-ai/langgraphjs/commit/658a076d5b50af9f5b96ab99f26ed629da6e182f), [`a9aa8d6`](https://github.com/langchain-ai/langgraphjs/commit/a9aa8d6a9b23f5f7d4c56889fa68697b1e076b31)]: - @langchain/langgraph-sdk@1.9.17 ## @langchain/vue@1.0.17 ### Patch Changes - [#2494](https://github.com/langchain-ai/langgraphjs/pull/2494) [`0a0e04e`](https://github.com/langchain-ai/langgraphjs/commit/0a0e04e9ff7e82fd08411cc0094e1f94729a1e1e) Thanks [@christian-bromann](https://github.com/christian-bromann)! - fix(sdk): revive automatic optimistic submit echo Echo `submit()` input into `values` / `messages` immediately with client-side id minting and id-based reconciliation as the server streams back. Expose per-message `optimisticStatus` via message metadata (`pending` → `sent` / `failed`), shallow-merge non-message keys with rollback when no `values` arrive, and add an `optimistic: false` hook opt-out. Plumb through React, Vue, Svelte, and Angular with browser e2e coverage. - [#2497](https://github.com/langchain-ai/langgraphjs/pull/2497) [`a9aa8d6`](https://github.com/langchain-ai/langgraphjs/commit/a9aa8d6a9b23f5f7d4c56889fa68697b1e076b31) Thanks [@christian-bromann](https://github.com/christian-bromann)! - fix(sdk): reconcile subagents and subgraphs on thread reconnect Seed deep-agent subagent cards from checkpoint messages and subgraph hosts from a single bounded `getHistory` read during `hydrate()`, so parallel fan-out discovery reappears immediately on refresh instead of waiting for SSE replay. Subagent execution namespaces are promoted through the existing guarded discovery state machine (bulk at hydrate, lazily per opened card via the selector layer). The getHistory cost is O(1) in requests regardless of fan-out width. - Updated dependencies \[[`0a0e04e`](https://github.com/langchain-ai/langgraphjs/commit/0a0e04e9ff7e82fd08411cc0094e1f94729a1e1e), [`658a076`](https://github.com/langchain-ai/langgraphjs/commit/658a076d5b50af9f5b96ab99f26ed629da6e182f), [`a9aa8d6`](https://github.com/langchain-ai/langgraphjs/commit/a9aa8d6a9b23f5f7d4c56889fa68697b1e076b31)]: - @langchain/langgraph-sdk@1.9.17 ## @langchain/langgraph-ui@1.2.5 ## @example/ai-elements@0.1.32 ### Patch Changes - Updated dependencies \[[`658a076`](https://github.com/langchain-ai/langgraphjs/commit/658a076d5b50af9f5b96ab99f26ed629da6e182f), [`0a0e04e`](https://github.com/langchain-ai/langgraphjs/commit/0a0e04e9ff7e82fd08411cc0094e1f94729a1e1e), [`a9aa8d6`](https://github.com/langchain-ai/langgraphjs/commit/a9aa8d6a9b23f5f7d4c56889fa68697b1e076b31)]: - @langchain/langgraph@1.3.6 - @langchain/react@1.0.17 ## @examples/assistant-ui-claude@0.1.32 ### Patch Changes - Updated dependencies \[[`658a076`](https://github.com/langchain-ai/langgraphjs/commit/658a076d5b50af9f5b96ab99f26ed629da6e182f), [`0a0e04e`](https://github.com/langchain-ai/langgraphjs/commit/0a0e04e9ff7e82fd08411cc0094e1f94729a1e1e), [`a9aa8d6`](https://github.com/langchain-ai/langgraphjs/commit/a9aa8d6a9b23f5f7d4c56889fa68697b1e076b31)]: - @langchain/langgraph@1.3.6 - @langchain/react@1.0.17 ## @examples/ui-angular@0.0.42 ### Patch Changes - Updated dependencies \[[`658a076`](https://github.com/langchain-ai/langgraphjs/commit/658a076d5b50af9f5b96ab99f26ed629da6e182f), [`0a0e04e`](https://github.com/langchain-ai/langgraphjs/commit/0a0e04e9ff7e82fd08411cc0094e1f94729a1e1e), [`658a076`](https://github.com/langchain-ai/langgraphjs/commit/658a076d5b50af9f5b96ab99f26ed629da6e182f), [`a9aa8d6`](https://github.com/langchain-ai/langgraphjs/commit/a9aa8d6a9b23f5f7d4c56889fa68697b1e076b31)]: - @langchain/langgraph@1.3.6 - @langchain/langgraph-sdk@1.9.17 - @langchain/angular@1.0.17 ## @examples/ui-multimodal@0.0.18 ### Patch Changes - Updated dependencies \[[`658a076`](https://github.com/langchain-ai/langgraphjs/commit/658a076d5b50af9f5b96ab99f26ed629da6e182f), [`0a0e04e`](https://github.com/langchain-ai/langgraphjs/commit/0a0e04e9ff7e82fd08411cc0094e1f94729a1e1e), [`a9aa8d6`](https://github.com/langchain-ai/langgraphjs/commit/a9aa8d6a9b23f5f7d4c56889fa68697b1e076b31)]: - @langchain/langgraph@1.3.6 - @langchain/react@1.0.17 ## @examples/ui-react@0.0.18 ### Patch Changes - Updated dependencies \[[`658a076`](https://github.com/langchain-ai/langgraphjs/commit/658a076d5b50af9f5b96ab99f26ed629da6e182f), [`0a0e04e`](https://github.com/langchain-ai/langgraphjs/commit/0a0e04e9ff7e82fd08411cc0094e1f94729a1e1e), [`658a076`](https://github.com/langchain-ai/langgraphjs/commit/658a076d5b50af9f5b96ab99f26ed629da6e182f), [`a9aa8d6`](https://github.com/langchain-ai/langgraphjs/commit/a9aa8d6a9b23f5f7d4c56889fa68697b1e076b31)]: - @langchain/langgraph@1.3.6 - @langchain/langgraph-sdk@1.9.17 - @langchain/react@1.0.17 ## langgraph@1.0.38 ### Patch Changes - Updated dependencies \[[`658a076`](https://github.com/langchain-ai/langgraphjs/commit/658a076d5b50af9f5b96ab99f26ed629da6e182f)]: - @langchain/langgraph@1.3.6 Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>