Skip to content

feat(langgraph): add support for standard schema in state definition #1510

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Draft
wants to merge 1 commit into
base: v1
Choose a base branch
from
Draft

feat(langgraph): add support for standard schema in state definition #1510

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions libs/langgraph/package.json
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,7 @@
"dependencies": {
"@langchain/langgraph-checkpoint": "^0.1.1",
"@langchain/langgraph-sdk": "~0.1.0",
"@standard-schema/spec": "^1.0.0",
"uuid": "^10.0.0"
},
"peerDependencies": {
Expand Down
16 changes: 15 additions & 1 deletion libs/langgraph/src/graph/annotation.ts
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,10 +1,20 @@
import type { StandardSchemaV1 } from "@standard-schema/spec";
import { RunnableLike } from "../pregel/runnable_types.js";
import { BaseChannel } from "../channels/base.js";
import { BinaryOperator, BinaryOperatorAggregate } from "../channels/binop.js";
import { LastValue } from "../channels/last_value.js";

export type SingleReducer<ValueType, UpdateType = ValueType> =
| {
state?: StandardSchemaV1<ValueType>;
update?: StandardSchemaV1<UpdateType>;

jsonSchemaExtra?: {
langgraph_nodes?: string[];
langgraph_type?: "prompt" | "messages";
[key: string]: unknown;
};

reducer: BinaryOperator<ValueType, UpdateType>;
default?: () => ValueType;
}
Expand All @@ -18,19 +28,23 @@ export type SingleReducer<ValueType, UpdateType = ValueType> =
| null;

export interface StateDefinition {
[key: string]: BaseChannel | (() => BaseChannel);
[key: string]: BaseChannel | (() => BaseChannel) | StandardSchemaV1;
}

type ExtractValueType<C> = C extends BaseChannel
? C["ValueType"]
: C extends () => BaseChannel
? ReturnType<C>["ValueType"]
: C extends StandardSchemaV1
? StandardSchemaV1.InferOutput<C>
: never;

type ExtractUpdateType<C> = C extends BaseChannel
? C["UpdateType"]
: C extends () => BaseChannel
? ReturnType<C>["UpdateType"]
: C extends StandardSchemaV1
? StandardSchemaV1.InferInput<C>
: never;

export type StateType<SD extends StateDefinition> = {
Expand Down
14 changes: 7 additions & 7 deletions libs/langgraph/src/graph/state.ts
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -279,18 +279,18 @@ export class StateGraph<
contextSchema?: C | AnnotationRoot<ToStateDefinition<C>>
);

/** @deprecated Use `Annotation.Root` or `zod` for state definition instead. */
constructor(
fields: SD extends StateDefinition
? SD | StateGraphArgs<S>
: StateGraphArgs<S>,
fields: SD extends InteropZodObject
? SD | ZodStateGraphArgsWithStateSchema<SD, I, O>
: never,
contextSchema?: C | AnnotationRoot<ToStateDefinition<C>>
);

/** @deprecated Use `Annotation.Root` or `zod` for state definition instead. */
constructor(
fields: SD extends InteropZodObject
? SD | ZodStateGraphArgsWithStateSchema<SD, I, O>
: never,
fields: SD extends StateDefinition
? SD | StateGraphArgs<S>
: StateGraphArgs<S>,
contextSchema?: C | AnnotationRoot<ToStateDefinition<C>>
);

Expand Down
8 changes: 8 additions & 0 deletions yarn.lock
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2342,6 +2342,7 @@ __metadata:
"@langchain/langgraph-sdk": "workspace:*"
"@langchain/openai": "npm:^0.4.0"
"@langchain/scripts": "npm:>=0.1.3 <0.2.0"
"@standard-schema/spec": "npm:^1.0.0"
"@swc/core": "npm:^1.3.90"
"@testing-library/dom": "npm:^10.4.0"
"@tsconfig/recommended": "npm:^1.0.3"
Expand Down Expand Up @@ -3542,6 +3543,13 @@ __metadata:
languageName: node
linkType: hard

"@standard-schema/spec@npm:^1.0.0":
version: 1.0.0
resolution: "@standard-schema/spec@npm:1.0.0"
checksum: 10/aee780cc1431888ca4b9aba9b24ffc8f3073fc083acc105e3951481478a2f4dc957796931b2da9e2d8329584cf211e4542275f188296c1cdff3ed44fd93a8bc8
languageName: node
linkType: hard

"@swc/core-darwin-arm64@npm:1.4.16":
version: 1.4.16
resolution: "@swc/core-darwin-arm64@npm:1.4.16"
Expand Down
Loading