chore: import upstream snapshot with attribution
This commit is contained in:
wehub-resource-sync
@@ -0,0 +1,54 @@
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||||
# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
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||||
|
||||
# dependencies
|
||||
node_modules
|
||||
/.pnp
|
||||
.pnp.*
|
||||
.yarn/*
|
||||
!.yarn/patches
|
||||
!.yarn/plugins
|
||||
!.yarn/releases
|
||||
!.yarn/versions
|
||||
|
||||
# testing
|
||||
/coverage
|
||||
|
||||
# next.js
|
||||
.next/
|
||||
/out/
|
||||
|
||||
# turbo
|
||||
.turbo
|
||||
|
||||
# Build outputs
|
||||
dist/
|
||||
|
||||
# production
|
||||
/build
|
||||
|
||||
# misc
|
||||
.DS_Store
|
||||
*.pem
|
||||
|
||||
# debug
|
||||
npm-debug.log*
|
||||
yarn-debug.log*
|
||||
yarn-error.log*
|
||||
.pnpm-debug.log*
|
||||
|
||||
# env files (can opt-in for committing if needed)
|
||||
.env*
|
||||
!.env.example
|
||||
|
||||
# vercel
|
||||
.vercel
|
||||
|
||||
# typescript
|
||||
*.tsbuildinfo
|
||||
next-env.d.ts
|
||||
|
||||
# lock files
|
||||
package-lock.json
|
||||
pnpm-lock.yaml
|
||||
yarn.lock
|
||||
bun.lockb
|
||||
@@ -0,0 +1,135 @@
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||||
# langgraph-js-starter
|
||||
|
||||
## 0.1.7 — 2026-04-21
|
||||
|
||||
### Fixed
|
||||
|
||||
- Hardened `emit_unknown_tools_notice` and `intercept_frontend_tools`
|
||||
against OpenAI tool_call invariant violations and prior-stash
|
||||
clobbering.
|
||||
- `useCopilotAction` deps on `setThemeColor` and `getWeather`.
|
||||
- `next lint` removal in Next 16 — replaced with direct ESLint invocation.
|
||||
- `route.ts` LANGSMITH warn now gates on NODE_ENV like DEPLOYMENT_URL.
|
||||
- `route.ts` log prefixes distinguish runtime-construction from dispatch
|
||||
failures.
|
||||
- `parseInterruptPayload` single-return-value, caller-owned log.
|
||||
|
||||
### Changed
|
||||
|
||||
- LICENSE copyright attribution: `2025-2026 CopilotKit` (was: individual).
|
||||
- README: fixed broken `pnpm --filter` example in troubleshooting;
|
||||
replaced inline `echo > .env` with `cp .env.example .env` + edit;
|
||||
corrected project-structure diagram comment to reference
|
||||
`pnpm-workspace.yaml`.
|
||||
- `apps/web/tsconfig.json`: dropped dead `.next/dev/types/**` include.
|
||||
- `apps/web/.env.example`: clarified that LANGSMITH\_\* vars forward to the
|
||||
agent.
|
||||
- Root `.gitignore`: ignore `dist/`.
|
||||
- `turbo.json`: add `start` task.
|
||||
- `apps/web/project.json`: `cache: false` on `build` target for Nx parity
|
||||
with package.json.
|
||||
- `apps/agent/tsconfig.json`: set `noEmit: true` so direct `tsc`
|
||||
invocation matches script-driven builds.
|
||||
|
||||
## 0.1.6 — 2026-04-21
|
||||
|
||||
### Changed
|
||||
|
||||
- Added `turbo.json` at the starter root so `turbo run dev/build/lint`
|
||||
works when the starter is extracted standalone (root scripts delegate
|
||||
to turbo; missing config previously broke extraction).
|
||||
- Added `pnpm-workspace.yaml` so pnpm v9+ reliably links
|
||||
`workspace:*` deps on standalone extraction; the `workspaces` array in
|
||||
the root `package.json` is not honored by pnpm on its own.
|
||||
- Bumped the agent `tsconfig.json` `target` from `es2016` to `ES2022`
|
||||
(with explicit `lib: ["ES2022"]`, no DOM) to match the declared
|
||||
Node 20+ runtime baseline.
|
||||
- Added `build` and `lint` scripts to `apps/agent/package.json`
|
||||
(`tsc -p tsconfig.json --noEmit` — identical to what `project.json`
|
||||
declares) so `turbo run build/lint` and nx targets agree.
|
||||
- Filled in the empty agent `description` and `author` fields.
|
||||
- Added `LANGSMITH_TRACING=true` (commented) to `apps/web/.env.example`
|
||||
to match the agent's `.env.example`.
|
||||
- Added `"baseUrl": "."` to `apps/web/tsconfig.json` so the `@/*` path
|
||||
alias resolves reliably across IDEs and tooling.
|
||||
- Removed Python-specific entries (`venv/`, `__pycache__/`, `*.pyc`)
|
||||
from `apps/agent/.gitignore` — leftovers from a forked Python
|
||||
LangGraph starter; this is a TypeScript project.
|
||||
- Added a copyright year to `LICENSE` (MIT convention requires one).
|
||||
|
||||
### Versioning
|
||||
|
||||
- Root, `apps/agent`, and `apps/web` all bumped from `0.1.5` to `0.1.6`
|
||||
in lockstep per the starter's shared-version convention.
|
||||
|
||||
## 0.1.5 — 2026-04-17
|
||||
|
||||
### Renamed
|
||||
|
||||
- Renamed directory from `interrupts-langraph` to `interrupts-langgraph`
|
||||
(spelling fix). The rename itself is code-neutral; hardening described
|
||||
below.
|
||||
|
||||
### Changed
|
||||
|
||||
- Tightened types in the agent graph (no `as any`, structural message
|
||||
narrowing) and added an explicit `bindTools` capability guard.
|
||||
- `shouldContinue` now evaluates ALL tool calls on an AIMessage and
|
||||
routes to `tool_node` whenever ANY call targets a registered backend
|
||||
tool. Previously a mixed batch (frontend action + backend tool) could
|
||||
silently drop the backend call. Each unknown tool-call name emits its
|
||||
own `console.warn`; routing then keeps the batch on `tool_node` when
|
||||
any known backend tool is present (ToolNode will emit an error
|
||||
ToolMessage for unknown tool names; the graph then loops back to
|
||||
`chat_node` with that error in context) and falls through to `END`
|
||||
otherwise.
|
||||
- Validated the interrupt payload on the web side via
|
||||
`parseInterruptPayload`; malformed payloads now render a cancellation
|
||||
fallback instead of crashing the renderer. Arrays are explicitly
|
||||
rejected (previously passed the `typeof === "object"` check and were
|
||||
coerced to the `Record` lookup path).
|
||||
- Validated the resumed interrupt value on the agent side via a zod
|
||||
schema (`ApprovalResumeSchema`); an out-of-band Client resuming with
|
||||
the wrong shape now fails loudly at the tool boundary instead of
|
||||
silently branching to "cancelled".
|
||||
- `deleteProverb` on the web side now uses a functional `setState`
|
||||
updater so concurrent state writes don't race.
|
||||
- React key for the proverb list is `${index}-${proverb}` (index + content
|
||||
composite). Chosen because plain `proverb` collides on duplicates and
|
||||
plain `index` destabilizes rows during agent-driven inserts. Migrating
|
||||
the underlying state to `{id, text}` objects is the proper long-term
|
||||
fix and is deferred.
|
||||
- Removed the unused `starterAgent` alias; extracted the model name
|
||||
to a `MODEL` constant for single-point swaps.
|
||||
- Wrapped `handleRequest` with a structured error response in the web
|
||||
runtime route (`apps/web/src/app/api/copilotkit/route.ts`), so
|
||||
unhandled exceptions surface as a structured 500 JSON response rather
|
||||
than the raw Next.js error page.
|
||||
- Corrected port references in the README (8125 everywhere).
|
||||
- Replaced the placeholder Next metadata with a real title/description.
|
||||
|
||||
### Dependencies
|
||||
|
||||
- `@types/node` ^20 → ^22.19.11
|
||||
- `typescript` ^5 → ^5.9.3
|
||||
- `zod` ^3.24.4 → ^3.25.76
|
||||
- Agent `@langchain/langgraph` → `1.1.5` (previously pinned via a root
|
||||
`overrides` entry at `1.0.2`; the override has been removed and the
|
||||
version is now declared directly on `apps/agent/package.json`).
|
||||
- Agent `@langchain/core` → `^1.1.26`.
|
||||
- Dropped the dead `@langchain/core` override from the starter root; it
|
||||
had no effect inside the monorepo pnpm workspace and would cap the
|
||||
agent's `^1.1.26` requirement if the starter were extracted.
|
||||
- Removed root `overrides` entry for `@langchain/langgraph` (was `1.0.2`);
|
||||
the agent owns its own version now.
|
||||
|
||||
### Versioning
|
||||
|
||||
- Sub-app versions synced to the root: `apps/agent` `0.0.1` → `0.1.5` and
|
||||
`apps/web` `0.1.0` → `0.1.5`. Convention: sub-app versions track the
|
||||
root starter version so changelog entries and `package.json` reads
|
||||
stay consistent across the workspace.
|
||||
|
||||
## 0.1.1 – 0.1.4
|
||||
|
||||
Internal only (dependency sync / tooling bumps).
|
||||
@@ -0,0 +1,21 @@
|
||||
The MIT License
|
||||
|
||||
Copyright (c) 2025-2026 CopilotKit
|
||||
|
||||
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
of this software and associated documentation files (the "Software"), to deal
|
||||
in the Software without restriction, including without limitation the rights
|
||||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
copies of the Software, and to permit persons to whom the Software is
|
||||
furnished to do so, subject to the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be included in
|
||||
all copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
THE SOFTWARE.
|
||||
@@ -0,0 +1,107 @@
|
||||
# CopilotKit <> LangGraph Starter
|
||||
|
||||
This is a starter template for building AI agents using [LangGraph](https://www.langchain.com/langgraph) and [CopilotKit](https://copilotkit.ai). It provides a modern Next.js application with an integrated LangGraph agent to be built on top of.
|
||||
|
||||
This project is organized as a monorepo using [pnpm workspaces](https://pnpm.io/workspaces).
|
||||
|
||||
## Project Structure
|
||||
|
||||
```
|
||||
.
|
||||
├── apps/
|
||||
│ ├── web/ # Next.js frontend application
|
||||
│ └── agent/ # LangGraph agent
|
||||
└── package.json # pnpm workspaces via pnpm-workspace.yaml
|
||||
```
|
||||
|
||||
## Prerequisites
|
||||
|
||||
- Node.js 20+
|
||||
- [pnpm](https://pnpm.io/installation) 9.15.0 or later
|
||||
- OpenAI API Key (for the LangGraph agent)
|
||||
|
||||
## Getting Started
|
||||
|
||||
1. Install all dependencies (this installs everything for both apps):
|
||||
|
||||
```bash
|
||||
pnpm install
|
||||
```
|
||||
|
||||
2. Set up your OpenAI API key by copying the example env file and editing it:
|
||||
|
||||
```bash
|
||||
cp apps/agent/.env.example apps/agent/.env
|
||||
```
|
||||
|
||||
Then open `apps/agent/.env` in your editor and fill in `OPENAI_API_KEY` with your key.
|
||||
|
||||
For production, also copy `apps/web/.env.example` to `apps/web/.env` and set `LANGGRAPH_DEPLOYMENT_URL` to your deployed agent URL.
|
||||
|
||||
3. Start the development servers:
|
||||
|
||||
```bash
|
||||
pnpm dev
|
||||
```
|
||||
|
||||
This will start both the Next.js app (on port 3000) and the LangGraph agent (on port 8125) via Turbo (installed as a dev dependency).
|
||||
|
||||
## Available Scripts
|
||||
|
||||
All scripts use Turbo to run tasks across the workspace:
|
||||
|
||||
- `pnpm dev` - Starts both the web app and agent servers in development mode
|
||||
- `pnpm build` - Builds all apps for production
|
||||
- `pnpm lint` - Runs linting across all apps
|
||||
|
||||
### Running Scripts for Individual Apps
|
||||
|
||||
You can also run scripts for individual apps using pnpm's filter flag:
|
||||
|
||||
```bash
|
||||
# Run dev for just the web app
|
||||
pnpm --filter web-langgraph-interrupt dev
|
||||
|
||||
# Run dev for just the agent
|
||||
pnpm --filter agent-langgraph-interrupt dev
|
||||
|
||||
# Or navigate to the app directory
|
||||
cd apps/web
|
||||
pnpm dev
|
||||
```
|
||||
|
||||
## Customization
|
||||
|
||||
The main UI component is in `apps/web/src/app/page.tsx`. You can:
|
||||
|
||||
- Modify the theme colors and styling
|
||||
- Add new frontend actions
|
||||
- Utilize shared-state
|
||||
- Customize your user-interface for interacting with LangGraph
|
||||
|
||||
The LangGraph agent code is in `apps/agent/src/`.
|
||||
|
||||
## 📚 Documentation
|
||||
|
||||
- [CopilotKit Documentation](https://docs.copilotkit.ai) - Explore CopilotKit's capabilities
|
||||
- [LangGraph Documentation](https://langchain-ai.github.io/langgraph/) - Learn more about LangGraph and its features
|
||||
- [Next.js Documentation](https://nextjs.org/docs) - Learn about Next.js features and API
|
||||
|
||||
## Contributing
|
||||
|
||||
Feel free to submit issues and enhancement requests! This starter is designed to be easily extensible.
|
||||
|
||||
## License
|
||||
|
||||
This project is licensed under the MIT License - see the LICENSE file for details.
|
||||
|
||||
## Troubleshooting
|
||||
|
||||
### Agent Connection Issues
|
||||
|
||||
**If the chat returns an "Internal error while dispatching CopilotKit request" 500:**
|
||||
Check the Next.js server logs for `[copilotkit/route] runtime construction failed:` or `[copilotkit/route] handleRequest dispatch failed:`. Common causes:
|
||||
|
||||
- `LANGGRAPH_DEPLOYMENT_URL` unset in production (required — check `apps/web/.env`)
|
||||
- LangGraph server not running at the configured URL (check `pnpm --filter agent-langgraph-interrupt dev` started cleanly)
|
||||
- `OPENAI_API_KEY` missing from `apps/agent/.env`
|
||||
@@ -0,0 +1,7 @@
|
||||
# OpenAI API key (required)
|
||||
OPENAI_API_KEY=
|
||||
|
||||
# LangSmith tracing (optional)
|
||||
# LANGSMITH_API_KEY=
|
||||
# LANGSMITH_TRACING=true
|
||||
# LANGSMITH_PROJECT=interrupts-langgraph
|
||||
@@ -0,0 +1,6 @@
|
||||
.env
|
||||
.vercel
|
||||
|
||||
# LangGraph API
|
||||
.langgraph_api
|
||||
node_modules/
|
||||
@@ -0,0 +1,9 @@
|
||||
{
|
||||
"node_version": "20",
|
||||
"dockerfile_lines": [],
|
||||
"dependencies": ["."],
|
||||
"graphs": {
|
||||
"default": "./src/agent.ts:graph"
|
||||
},
|
||||
"env": ".env"
|
||||
}
|
||||
@@ -0,0 +1,28 @@
|
||||
{
|
||||
"name": "agent-langgraph-interrupt",
|
||||
"version": "0.1.7",
|
||||
"private": true,
|
||||
"description": "LangGraph agent for the CopilotKit interrupts starter",
|
||||
"keywords": [],
|
||||
"license": "MIT",
|
||||
"author": "CopilotKit",
|
||||
"scripts": {
|
||||
"dev": "npx @langchain/langgraph-cli dev --port 8125 --no-browser",
|
||||
"build": "tsc -p tsconfig.json --noEmit",
|
||||
"lint": "tsc -p tsconfig.json --noEmit"
|
||||
},
|
||||
"dependencies": {
|
||||
"@copilotkit/sdk-js": "workspace:*",
|
||||
"@langchain/core": "^1.1.26",
|
||||
"@langchain/langgraph": "1.1.5",
|
||||
"@langchain/openai": "^1.2.8",
|
||||
"zod": "^3.25.76"
|
||||
},
|
||||
"devDependencies": {
|
||||
"@types/node": "^22.19.11",
|
||||
"typescript": "^5.9.3"
|
||||
},
|
||||
"engines": {
|
||||
"node": ">=20.0.0"
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,29 @@
|
||||
{
|
||||
"name": "agent-langgraph-interrupt",
|
||||
"$schema": "../../node_modules/nx/schemas/project-schema.json",
|
||||
"sourceRoot": "apps/agent/src",
|
||||
"projectType": "application",
|
||||
"targets": {
|
||||
"dev": {
|
||||
"executor": "nx:run-commands",
|
||||
"options": {
|
||||
"command": "pnpm --filter agent-langgraph-interrupt dev"
|
||||
}
|
||||
},
|
||||
"build": {
|
||||
"executor": "nx:run-commands",
|
||||
"options": {
|
||||
"command": "tsc -p tsconfig.json --noEmit",
|
||||
"cwd": "examples/v2/interrupts-langgraph/apps/agent"
|
||||
}
|
||||
},
|
||||
"lint": {
|
||||
"executor": "nx:run-commands",
|
||||
"options": {
|
||||
"command": "tsc -p tsconfig.json --noEmit",
|
||||
"cwd": "examples/v2/interrupts-langgraph/apps/agent"
|
||||
}
|
||||
}
|
||||
},
|
||||
"tags": []
|
||||
}
|
||||
@@ -0,0 +1,924 @@
|
||||
/**
|
||||
* This is the main entry point for the agent.
|
||||
* It defines the workflow graph, state, tools, nodes and edges.
|
||||
*/
|
||||
|
||||
import { randomUUID } from "node:crypto";
|
||||
import { z } from "zod";
|
||||
import type { RunnableConfig } from "@langchain/core/runnables";
|
||||
import { tool } from "@langchain/core/tools";
|
||||
import type { ToolRunnableConfig } from "@langchain/core/tools";
|
||||
import { ToolNode } from "@langchain/langgraph/prebuilt";
|
||||
import type { BaseMessage, ToolCall } from "@langchain/core/messages";
|
||||
import {
|
||||
AIMessage,
|
||||
isAIMessage,
|
||||
SystemMessage,
|
||||
ToolMessage,
|
||||
} from "@langchain/core/messages";
|
||||
|
||||
import {
|
||||
Annotation,
|
||||
Command,
|
||||
END,
|
||||
getCurrentTaskInput,
|
||||
interrupt,
|
||||
MemorySaver,
|
||||
START,
|
||||
StateGraph,
|
||||
} from "@langchain/langgraph";
|
||||
import { ChatOpenAI } from "@langchain/openai";
|
||||
import {
|
||||
convertActionsToDynamicStructuredTools,
|
||||
CopilotKitStateAnnotation,
|
||||
} from "@copilotkit/sdk-js/langgraph";
|
||||
|
||||
// Include CopilotKitStateAnnotation so the frontend can attach actions and
|
||||
// so messages flow through the same channel the SDK expects.
|
||||
//
|
||||
// `interceptedToolCalls` + `originalAIMessageId` mirror
|
||||
// `@copilotkit/sdk-js/langgraph`'s `copilotkitMiddleware.afterModel`
|
||||
// intercept pattern (see node_modules/@copilotkit/sdk-js/src/langgraph/middleware.ts):
|
||||
// on a mixed batch (backend tool call + frontend-action call in the same
|
||||
// AIMessage), we strip the frontend calls out of the AIMessage before
|
||||
// ToolNode runs (otherwise ToolNode errors on "Tool not found" for the
|
||||
// frontend action names), stash them here, then restore them onto the
|
||||
// original AIMessage before the graph ends so the frontend runtime still
|
||||
// dispatches them. Raw-StateGraph starters like this one don't use
|
||||
// createAgent+middleware, so we reproduce the pattern inline.
|
||||
const AgentStateAnnotation = Annotation.Root({
|
||||
...CopilotKitStateAnnotation.spec,
|
||||
proverbs: Annotation<string[]>,
|
||||
interceptedToolCalls: Annotation<ToolCall[] | undefined>,
|
||||
originalAIMessageId: Annotation<string | undefined>,
|
||||
});
|
||||
|
||||
export type AgentState = typeof AgentStateAnnotation.State;
|
||||
|
||||
// The renderer in apps/web/src/app/page.tsx validates the *emitted* interrupt
|
||||
// payload against its own `parseInterruptPayload` shape. We validate the
|
||||
// *resumed* payload here so an out-of-band Client that resumes with the wrong
|
||||
// shape fails loudly at the tool boundary instead of silently branching to
|
||||
// "cancelled".
|
||||
const ApprovalResumeSchema = z.object({
|
||||
approved: z.boolean(),
|
||||
});
|
||||
|
||||
const getWeather = tool(
|
||||
(args) => {
|
||||
return `The weather for ${args.location} is 70 degrees, clear skies, 45% humidity, 5 mph wind, and feels like 72 degrees.`;
|
||||
},
|
||||
{
|
||||
name: "getWeather",
|
||||
description: "Get the weather for a given location.",
|
||||
schema: z.object({
|
||||
location: z.string().describe("The location to get weather for"),
|
||||
}),
|
||||
},
|
||||
);
|
||||
|
||||
// HITL tool: triggers an interrupt that the frontend resolves with
|
||||
// `{ approved: boolean }`. Validated with zod so a malformed resume value
|
||||
// surfaces as a deterministic tool message rather than throwing through
|
||||
// ToolNode.
|
||||
//
|
||||
// On approval, returns a `Command` that BOTH emits a ToolMessage (so the
|
||||
// model sees the tool result) AND applies a state update that removes the
|
||||
// matching proverb from `state.proverbs`. Without the state update, the
|
||||
// UI (which reads `state.proverbs` via CopilotKit) would still show the
|
||||
// "deleted" proverb, making the HITL demo a sham.
|
||||
const deleteProverb = tool(
|
||||
async (args, config: ToolRunnableConfig) => {
|
||||
// `config.toolCall.id` is the canonical id accessor when a tool is
|
||||
// invoked by ToolNode. ToolNode calls `tool.invoke({...call, type:
|
||||
// "tool_call"}, config)` (see
|
||||
// node_modules/@langchain/langgraph/dist/prebuilt/tool_node.js runTool),
|
||||
// and @langchain/core's StructuredTool.invoke then copies the call
|
||||
// onto `enrichedConfig.toolCall` (see
|
||||
// node_modules/@langchain/core/dist/tools/index.js lines 84-91) before
|
||||
// forwarding to the tool function. This is typed on `ToolRunnableConfig`
|
||||
// — typing `config` explicitly above is what gives us the safe accessor.
|
||||
//
|
||||
// We need the id here because returning a `Command` bypasses
|
||||
// `_formatToolOutput`'s automatic tool_call_id wiring. If the id is
|
||||
// somehow missing we throw loudly rather than silently emitting
|
||||
// `tool_call_id: ""`, which OpenAI rejects on the next turn with
|
||||
// "tool_call_id does not match any preceding tool_calls".
|
||||
const toolCallId = config.toolCall?.id;
|
||||
if (typeof toolCallId !== "string" || toolCallId.length === 0) {
|
||||
throw new Error(
|
||||
"deleteProverb: missing tool_call_id on ToolRunnableConfig.toolCall — " +
|
||||
"tool was invoked outside a ToolNode context. Refusing to emit a " +
|
||||
"ToolMessage with an empty tool_call_id (OpenAI rejects those).",
|
||||
);
|
||||
}
|
||||
|
||||
const rawApproval = interrupt({
|
||||
action: "delete_proverb",
|
||||
proverb: args.proverb,
|
||||
message: `Are you sure you want to delete the proverb: "${args.proverb}"?`,
|
||||
});
|
||||
|
||||
let approval: z.infer<typeof ApprovalResumeSchema>;
|
||||
try {
|
||||
approval = ApprovalResumeSchema.parse(rawApproval);
|
||||
} catch (err) {
|
||||
// Only swallow ZodError — any other throw (programming errors, runtime
|
||||
// failures, etc.) must propagate so we don't mask real bugs behind a
|
||||
// generic tool message.
|
||||
if (!(err instanceof z.ZodError)) {
|
||||
throw err;
|
||||
}
|
||||
// eslint-disable-next-line no-console
|
||||
console.error("[deleteProverb] resume payload rejected:", err.issues);
|
||||
// Don't let ZodError propagate through ToolNode. Return a
|
||||
// deterministic tool message so the graph can loop back to chat_node
|
||||
// with a readable result in context.
|
||||
return new ToolMessage({
|
||||
status: "error",
|
||||
name: "deleteProverb",
|
||||
tool_call_id: toolCallId,
|
||||
content:
|
||||
"Confirmation failed due to an unexpected resume payload shape; deletion was NOT performed.",
|
||||
});
|
||||
}
|
||||
|
||||
if (approval.approved) {
|
||||
// Read the current graph state via LangGraph's task-local accessor so
|
||||
// we can filter `proverbs` deterministically. We match by content
|
||||
// (the schema accepts the proverb text). If multiple proverbs tie
|
||||
// exactly, only the first matching entry is removed — consistent
|
||||
// with "delete the proverb the user named".
|
||||
//
|
||||
// AgentStateAnnotation's `proverbs` channel has no reducer, so
|
||||
// Annotation<string[]> defaults to last-write-wins: emitting a
|
||||
// filtered array replaces the channel wholesale (which is exactly
|
||||
// what chat_node reads on the next turn for the system prompt).
|
||||
const currentState = getCurrentTaskInput<AgentState>();
|
||||
const current = Array.isArray(currentState?.proverbs)
|
||||
? currentState.proverbs
|
||||
: [];
|
||||
const idx = current.indexOf(args.proverb);
|
||||
|
||||
// Approved-but-not-present: do not lie to the model. Return an
|
||||
// error ToolMessage so the model sees "nothing matched" and can
|
||||
// respond truthfully instead of confirming a deletion that never
|
||||
// happened.
|
||||
if (idx === -1) {
|
||||
return new Command({
|
||||
update: {
|
||||
messages: [
|
||||
new ToolMessage({
|
||||
status: "error",
|
||||
name: "deleteProverb",
|
||||
tool_call_id: toolCallId,
|
||||
content: `No proverb matching "${args.proverb}" was found; nothing was deleted.`,
|
||||
}),
|
||||
],
|
||||
},
|
||||
});
|
||||
}
|
||||
|
||||
const filtered = [...current.slice(0, idx), ...current.slice(idx + 1)];
|
||||
|
||||
return new Command({
|
||||
update: {
|
||||
messages: [
|
||||
new ToolMessage({
|
||||
status: "success",
|
||||
name: "deleteProverb",
|
||||
tool_call_id: toolCallId,
|
||||
content: `Proverb "${args.proverb}" has been deleted.`,
|
||||
}),
|
||||
],
|
||||
proverbs: filtered,
|
||||
},
|
||||
});
|
||||
}
|
||||
|
||||
// Mirror the approved branch: return a Command wrapping a ToolMessage
|
||||
// so the model sees a well-formed tool result with the correct
|
||||
// tool_call_id (OpenAI rejects tool messages with mismatched ids).
|
||||
// Cancellation is not success — the tool did not complete its stated
|
||||
// intent — so the ToolMessage status is "error". The content string is
|
||||
// truthful as a user-cancelled message.
|
||||
return new Command({
|
||||
update: {
|
||||
messages: [
|
||||
new ToolMessage({
|
||||
status: "error",
|
||||
name: "deleteProverb",
|
||||
tool_call_id: toolCallId,
|
||||
content: `Deletion of proverb "${args.proverb}" was cancelled by the user.`,
|
||||
}),
|
||||
],
|
||||
},
|
||||
});
|
||||
},
|
||||
{
|
||||
name: "deleteProverb",
|
||||
description:
|
||||
"Delete a proverb from the list. This will ask the user for confirmation before deleting.",
|
||||
schema: z.object({
|
||||
proverb: z.string().describe("The proverb to delete"),
|
||||
}),
|
||||
},
|
||||
);
|
||||
|
||||
const tools = [getWeather, deleteProverb];
|
||||
|
||||
// gpt-4o-mini: reliable tool-calling, low cost. Swap model here if you
|
||||
// need different tradeoffs.
|
||||
const MODEL = "gpt-4o-mini";
|
||||
|
||||
async function chat_node(state: AgentState, config: RunnableConfig) {
|
||||
const model = new ChatOpenAI({ model: MODEL });
|
||||
|
||||
// Bind tools to the model, including CopilotKit frontend actions.
|
||||
//
|
||||
// bindTools is optional on BaseChatModel's type; guard explicitly instead
|
||||
// of using the non-null `!` escape hatch so a model instance that doesn't
|
||||
// support tool binding fails loudly.
|
||||
if (typeof model.bindTools !== "function") {
|
||||
throw new Error(
|
||||
`ChatOpenAI instance for model "${MODEL}" does not expose bindTools; cannot bind tools for this model.`,
|
||||
);
|
||||
}
|
||||
const modelWithTools = model.bindTools([
|
||||
...convertActionsToDynamicStructuredTools(state.copilotkit?.actions ?? []),
|
||||
...tools,
|
||||
]);
|
||||
|
||||
const systemMessage = new SystemMessage({
|
||||
content: `You are a helpful assistant. The current proverbs are ${JSON.stringify(state.proverbs ?? [])}. If a user asks to delete a proverb, call deleteProverb to trigger a human-in-the-loop interrupt for confirmation.`,
|
||||
});
|
||||
|
||||
const response = await modelWithTools.invoke(
|
||||
[systemMessage, ...(state.messages ?? [])],
|
||||
config,
|
||||
);
|
||||
|
||||
return {
|
||||
messages: [response],
|
||||
};
|
||||
}
|
||||
|
||||
// intercept_frontend_tools: strips frontend-action tool_calls out of the
|
||||
// last AIMessage before ToolNode runs and stashes them in state.
|
||||
//
|
||||
// ToolNode only knows about backend `tools` (getWeather, deleteProverb); it
|
||||
// looks up each `tool_call.name` in its own registry and throws
|
||||
// "Tool not found" for any frontend-action name (see
|
||||
// node_modules/@langchain/langgraph/dist/prebuilt/tool_node.js, runTool).
|
||||
// On a mixed batch that would leave backend results AND a model-visible
|
||||
// error ToolMessage for the frontend action, and the frontend would never
|
||||
// see the frontend-action call at all.
|
||||
//
|
||||
// The intercept+restore pattern mirrors CopilotKit's own
|
||||
// `copilotkitMiddleware.afterModel` + `afterAgent` (see
|
||||
// node_modules/@copilotkit/sdk-js/src/langgraph/middleware.ts). The
|
||||
// `restore_frontend_tools` node below reattaches the stashed calls to the
|
||||
// original AIMessage (matched by id) before the graph ends so the
|
||||
// CopilotKit runtime still dispatches them to the frontend.
|
||||
//
|
||||
// Pure-frontend-only batches skip this node entirely — shouldContinue
|
||||
// routes them straight to END, and the AIMessage with their tool_calls
|
||||
// reaches the frontend as-is.
|
||||
// Rebuild an AIMessage with a different tool_calls set while preserving
|
||||
// every other field (additional_kwargs, response_metadata, usage_metadata,
|
||||
// name, invalid_tool_calls, id, content). Required for LangSmith tracing
|
||||
// + token accounting — naively constructing `new AIMessage({ content,
|
||||
// tool_calls, id })` drops everything else.
|
||||
//
|
||||
// Note: `tool_call_chunks` only exists on AIMessageChunk, and the AIMessage
|
||||
// constructor does not accept it — preserving it here was a no-op. Omitted.
|
||||
function rebuildAIMessageWithToolCalls(
|
||||
source: AIMessage,
|
||||
toolCalls: ToolCall[],
|
||||
): AIMessage {
|
||||
return new AIMessage({
|
||||
content: source.content,
|
||||
id: source.id,
|
||||
name: source.name,
|
||||
additional_kwargs: source.additional_kwargs,
|
||||
response_metadata: source.response_metadata,
|
||||
usage_metadata: source.usage_metadata,
|
||||
invalid_tool_calls: source.invalid_tool_calls,
|
||||
tool_calls: toolCalls,
|
||||
});
|
||||
}
|
||||
|
||||
function intercept_frontend_tools(state: AgentState) {
|
||||
const frontendActionNames = new Set(
|
||||
(state.copilotkit?.actions ?? []).map((a: { name: string }) => a.name),
|
||||
);
|
||||
if (frontendActionNames.size === 0) {
|
||||
return {};
|
||||
}
|
||||
|
||||
// Widen to our directly-imported `BaseMessage` type so `isAIMessage`
|
||||
// (1.1.27) can narrow a `state.messages[i]` (structurally identical
|
||||
// 1.1.40) without the pnpm nominal-mismatch error. Runtime values are
|
||||
// unaffected — see the matching annotation on `lastMessage` in
|
||||
// `shouldContinue`.
|
||||
let messages = (state.messages ?? []) as unknown as BaseMessage[];
|
||||
|
||||
// The per-turn intercept slot is a single pair (interceptedToolCalls +
|
||||
// originalAIMessageId) with no reducer on the annotation — it cannot
|
||||
// queue. If the graph re-enters this node for a second mixed batch in
|
||||
// the same thread before `restore_frontend_tools` has flushed the prior
|
||||
// stash, we must flush the previous stash onto its matching AIMessage
|
||||
// inline here. Otherwise last-write-wins would silently drop the
|
||||
// earlier frontend-action calls and the frontend would never see them.
|
||||
//
|
||||
// Flush strategy on re-entry:
|
||||
// (a) First pass: walk `messages` and reattach the prior stash onto
|
||||
// the AIMessage whose id matches `priorOriginalId` (pre-strip).
|
||||
// (b) If (a) finds no match AND this pass would otherwise overwrite
|
||||
// the slot with a new stash (the mixed-batch return below), we
|
||||
// make a second flush attempt against the newly-rewritten
|
||||
// `messages` array (post-strip) before committing the new stash.
|
||||
// (c) If both attempts fail, we emit a loud warn naming the lost
|
||||
// AIMessage id + tool-call ids and STILL write the new stash —
|
||||
// merging two different AIMessage ids into one slot would corrupt
|
||||
// `originalAIMessageId`. The warn is the escape valve.
|
||||
//
|
||||
// The `frontendToolCalls.length === 0` return branch applies a
|
||||
// flush-or-clear rule: if the pre-strip flush matched (prior_flushed),
|
||||
// the updated messages are emitted and the slot is cleared; if it
|
||||
// didn't match but a prior stash was present, the slot is cleared
|
||||
// with a warn (retaining it risks double-flushing onto the original
|
||||
// AIMessage on a subsequent non-stripping turn since the AIMessage
|
||||
// may still be in history).
|
||||
const priorIntercepted = state.interceptedToolCalls;
|
||||
const priorOriginalId = state.originalAIMessageId;
|
||||
const priorSlotPresent =
|
||||
!!priorIntercepted &&
|
||||
priorIntercepted.length > 0 &&
|
||||
typeof priorOriginalId === "string" &&
|
||||
priorOriginalId.length > 0;
|
||||
let prior_flushed = false;
|
||||
if (priorSlotPresent) {
|
||||
messages = messages.map((msg) => {
|
||||
if (isAIMessage(msg) && msg.id === priorOriginalId) {
|
||||
prior_flushed = true;
|
||||
const existing = msg.tool_calls ?? [];
|
||||
return rebuildAIMessageWithToolCalls(msg, [
|
||||
...existing,
|
||||
...priorIntercepted!,
|
||||
]);
|
||||
}
|
||||
return msg;
|
||||
});
|
||||
if (!prior_flushed) {
|
||||
// eslint-disable-next-line no-console
|
||||
console.warn(
|
||||
`[intercept_frontend_tools] prior intercept slot held id=${priorOriginalId} but no matching AIMessage was found to flush onto (pre-strip); downstream branches will flush-or-clear.`,
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
const lastMessage: BaseMessage | undefined = messages[messages.length - 1];
|
||||
if (lastMessage === undefined || !isAIMessage(lastMessage)) {
|
||||
return {};
|
||||
}
|
||||
|
||||
const toolCalls = lastMessage.tool_calls ?? [];
|
||||
const backendToolCalls: ToolCall[] = [];
|
||||
const frontendToolCalls: ToolCall[] = [];
|
||||
for (const call of toolCalls) {
|
||||
if (frontendActionNames.has(call.name)) {
|
||||
frontendToolCalls.push(call);
|
||||
} else {
|
||||
backendToolCalls.push(call);
|
||||
}
|
||||
}
|
||||
|
||||
// `AIMessage.id` is typed `string | undefined` in @langchain/core. If the
|
||||
// upstream provider (or a test fixture) produced an AIMessage without an
|
||||
// id AND this batch needs stripping, `restore_frontend_tools` would never
|
||||
// find a matching id on the later pass — frontend-action calls would be
|
||||
// silently dropped and the user would see nothing. Synthesize a stable
|
||||
// id in place so the strip/stash/restore chain can match. LangChain
|
||||
// AIMessage is mutable; the synthesized id survives `rebuildAIMessageWithToolCalls`
|
||||
// (which copies `id` from `source.id`) and lives on the same object
|
||||
// reference in `messages`.
|
||||
if (
|
||||
frontendToolCalls.length > 0 &&
|
||||
(typeof lastMessage.id !== "string" || lastMessage.id.length === 0)
|
||||
) {
|
||||
const synthesizedId = `synthesized-${randomUUID()}`;
|
||||
// eslint-disable-next-line no-console
|
||||
console.warn(
|
||||
`[intercept_frontend_tools] lastMessage.id is missing on an AIMessage with ${frontendToolCalls.length} frontend-action call(s); synthesizing id=${synthesizedId} so restore_frontend_tools can match. Upstream provider should supply stable AIMessage ids.`,
|
||||
);
|
||||
(lastMessage as AIMessage).id = synthesizedId;
|
||||
}
|
||||
|
||||
if (frontendToolCalls.length === 0) {
|
||||
// No frontend calls in the batch — nothing to strip.
|
||||
//
|
||||
// Three prior-slot cases to distinguish:
|
||||
// (a) prior_flushed === true: we reattached the stashed calls onto
|
||||
// a matching AIMessage above; emit the updated messages and
|
||||
// clear the slot.
|
||||
// (b) priorSlotPresent && !prior_flushed: no matching AIMessage was
|
||||
// found THIS pass. Over a sequence like
|
||||
// [mixed-stash] → [backend-only+unknown] → [pure-backend],
|
||||
// retaining the stash across multiple non-stripping turns would
|
||||
// eventually let `restore_frontend_tools` re-apply it to an
|
||||
// unrelated AIMessage (or let a future intercept pass
|
||||
// double-append onto the original AIMessage still in history).
|
||||
// Flush-or-clear discipline: if we had a stash and this path
|
||||
// isn't stripping, clear it. Emit a warn so operators can
|
||||
// debug the dropped frontend-action dispatch.
|
||||
// (c) No prior slot: no-op.
|
||||
if (prior_flushed) {
|
||||
return {
|
||||
messages,
|
||||
interceptedToolCalls: undefined,
|
||||
originalAIMessageId: undefined,
|
||||
} as unknown as Partial<AgentState>;
|
||||
}
|
||||
if (priorSlotPresent) {
|
||||
const lostIds = priorIntercepted!
|
||||
.map((c) => c.id ?? "<no-id>")
|
||||
.join(", ");
|
||||
// eslint-disable-next-line no-console
|
||||
console.warn(
|
||||
`[intercept_frontend_tools] prior intercept slot held id=${priorOriginalId} but no matching AIMessage was found and this path isn't stripping; clearing stash to prevent later re-application onto an unrelated AIMessage. Lost tool-call ids: [${lostIds}]`,
|
||||
);
|
||||
return {
|
||||
interceptedToolCalls: undefined,
|
||||
originalAIMessageId: undefined,
|
||||
} as unknown as Partial<AgentState>;
|
||||
}
|
||||
return {};
|
||||
}
|
||||
|
||||
// Rebuild the AIMessage preserving id (so restore_frontend_tools can
|
||||
// find it later) AND all other metadata (additional_kwargs,
|
||||
// response_metadata, usage_metadata, etc.) with only the backend calls.
|
||||
const strippedAIMessage = rebuildAIMessageWithToolCalls(
|
||||
lastMessage,
|
||||
backendToolCalls,
|
||||
);
|
||||
|
||||
// Compose the outgoing message list with the strip applied so any
|
||||
// post-strip flush attempt sees the final shape.
|
||||
let outgoingMessages: BaseMessage[] = [
|
||||
...messages.slice(0, -1),
|
||||
strippedAIMessage,
|
||||
];
|
||||
|
||||
// Mixed-batch overwrite guard: if a prior stash is still present and
|
||||
// was NOT flushed in the pre-strip pass above, we are about to
|
||||
// overwrite the slot. Try one more flush against the post-strip
|
||||
// `outgoingMessages` before giving up. If still unmatched, warn
|
||||
// loudly — merging different AIMessage ids into one slot would
|
||||
// corrupt `originalAIMessageId`, so we accept losing the prior stash
|
||||
// in exchange for a coherent new one. The warn mirrors the
|
||||
// "no matching AIMessage" style used by `restore_frontend_tools`.
|
||||
if (priorSlotPresent && !prior_flushed) {
|
||||
let lateFlushed = false;
|
||||
outgoingMessages = outgoingMessages.map((msg) => {
|
||||
if (isAIMessage(msg) && msg.id === priorOriginalId) {
|
||||
lateFlushed = true;
|
||||
const existing = msg.tool_calls ?? [];
|
||||
return rebuildAIMessageWithToolCalls(msg, [
|
||||
...existing,
|
||||
...priorIntercepted!,
|
||||
]);
|
||||
}
|
||||
return msg;
|
||||
});
|
||||
if (!lateFlushed) {
|
||||
const lostIds = priorIntercepted!
|
||||
.map((c) => c.id ?? "<no-id>")
|
||||
.join(", ");
|
||||
// eslint-disable-next-line no-console
|
||||
console.warn(
|
||||
`[intercept_frontend_tools] prior intercept slot held id=${priorOriginalId} but no matching AIMessage was found to flush onto (pre- or post-strip); overwriting stash with current mixed-batch intercept. Lost tool-call ids: [${lostIds}]`,
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
// The outer cast passes the return past a pre-existing pnpm monorepo
|
||||
// resolution quirk: `@langchain/langgraph@1.1.5` pins `@langchain/core`
|
||||
// at a different patch level than this agent's direct dep, so our
|
||||
// imported `AIMessage/BaseMessage` and the graph-state's internal
|
||||
// version are nominally distinct types though structurally identical
|
||||
// at runtime. chat_node's `return { messages: [response] }` hits the
|
||||
// same mismatch implicitly; cf. the baseline tsc errors on that line.
|
||||
return {
|
||||
messages: outgoingMessages,
|
||||
interceptedToolCalls: frontendToolCalls,
|
||||
originalAIMessageId: lastMessage.id,
|
||||
} as unknown as Partial<AgentState>;
|
||||
}
|
||||
|
||||
// restore_frontend_tools: reattaches the stashed frontend-action tool_calls
|
||||
// to the original AIMessage (matched by id) so the CopilotKit runtime can
|
||||
// dispatch them to the frontend. Mirrors `copilotkitMiddleware.afterAgent`.
|
||||
function restore_frontend_tools(state: AgentState) {
|
||||
const interceptedToolCalls = state.interceptedToolCalls;
|
||||
const originalMessageId = state.originalAIMessageId;
|
||||
if (
|
||||
!interceptedToolCalls ||
|
||||
interceptedToolCalls.length === 0 ||
|
||||
!originalMessageId
|
||||
) {
|
||||
return {};
|
||||
}
|
||||
|
||||
// Widen to our directly-imported `BaseMessage` for `isAIMessage` —
|
||||
// see the matching cast in `intercept_frontend_tools` above.
|
||||
const messages = (state.messages ?? []) as unknown as BaseMessage[];
|
||||
let messageFound = false;
|
||||
const updatedMessages: BaseMessage[] = messages.map((msg) => {
|
||||
if (isAIMessage(msg) && msg.id === originalMessageId) {
|
||||
messageFound = true;
|
||||
const existing = msg.tool_calls ?? [];
|
||||
// Preserve all AIMessage metadata (additional_kwargs,
|
||||
// response_metadata, usage_metadata, name, invalid_tool_calls)
|
||||
// — a naive rebuild drops them and breaks LangSmith tracing +
|
||||
// token accounting.
|
||||
return rebuildAIMessageWithToolCalls(msg, [
|
||||
...existing,
|
||||
...interceptedToolCalls,
|
||||
]);
|
||||
}
|
||||
return msg;
|
||||
});
|
||||
|
||||
if (!messageFound) {
|
||||
// This node is terminal (edge goes to END). Clear both slots so a
|
||||
// stale stash can't be flushed onto an unrelated AIMessage on a
|
||||
// later intercept pass. The warn is the diagnostic signal —
|
||||
// persisting the slot would corrupt future turns rather than help
|
||||
// diagnose this one.
|
||||
// eslint-disable-next-line no-console
|
||||
console.warn(
|
||||
`[restore_frontend_tools] original AIMessage id=${originalMessageId} not found in messages; clearing stash to avoid cross-turn corruption`,
|
||||
);
|
||||
return {
|
||||
interceptedToolCalls: undefined,
|
||||
originalAIMessageId: undefined,
|
||||
} as unknown as Partial<AgentState>;
|
||||
}
|
||||
|
||||
// See note on the matching return in `intercept_frontend_tools`.
|
||||
return {
|
||||
messages: updatedMessages,
|
||||
interceptedToolCalls: undefined,
|
||||
originalAIMessageId: undefined,
|
||||
} as unknown as Partial<AgentState>;
|
||||
}
|
||||
|
||||
// The return type is the union of node names plus END, matching the
|
||||
// shape addConditionalEdges expects from its callback.
|
||||
function shouldContinue({
|
||||
messages,
|
||||
copilotkit,
|
||||
}: AgentState):
|
||||
| "intercept_frontend_tools"
|
||||
| "tool_node"
|
||||
| "restore_frontend_tools"
|
||||
| "emit_unknown_tools_notice"
|
||||
| typeof END {
|
||||
// Guard the tool-call-carrying variant structurally instead of casting
|
||||
// BaseMessage to AIMessage.
|
||||
const lastMessage: BaseMessage | undefined = messages[messages.length - 1];
|
||||
if (lastMessage === undefined) {
|
||||
return END;
|
||||
}
|
||||
// AIMessage is the only message variant that carries tool_calls. Use
|
||||
// the `isAIMessage` type predicate from @langchain/core/messages so the
|
||||
// narrowing is checked rather than cast.
|
||||
if (!isAIMessage(lastMessage)) {
|
||||
const kind = lastMessage._getType();
|
||||
// Log and fall through to END in both dev and prod so a graph-shape
|
||||
// bug doesn't crash the process. Tradeoff: the user sees the turn
|
||||
// end silently (no synthetic error message surfaced to the chat).
|
||||
// Follow-up: emit a synthetic AIMessage from chat_node (not this
|
||||
// routing function) the next time we observe unexpected internal
|
||||
// state, so the user sees "I hit an unexpected internal state —
|
||||
// please try rephrasing."
|
||||
// eslint-disable-next-line no-console
|
||||
console.warn("[shouldContinue] unexpected last message type:", kind);
|
||||
return END;
|
||||
}
|
||||
|
||||
// Evaluate ALL tool calls. If ANY tool call targets a backend tool (i.e.
|
||||
// not a CopilotKit frontend action), we must route to `tool_node` so the
|
||||
// backend tool runs — returning END on mixed batches would silently
|
||||
// drop the backend call.
|
||||
const toolCalls = lastMessage.tool_calls ?? [];
|
||||
if (toolCalls.length > 0) {
|
||||
const actionNames = new Set((copilotkit?.actions ?? []).map((a) => a.name));
|
||||
// Widen to `Set<string>` because TypeScript's `Set<T>.has` parameter
|
||||
// is invariant on T — a `Set<"getWeather" | "deleteProverb">` would
|
||||
// reject a caller-supplied plain `string` at compile time even though
|
||||
// the runtime answer (`false` for unknown names) is exactly what we
|
||||
// want.
|
||||
const backendToolNames = new Set<string>(tools.map((t) => t.name));
|
||||
|
||||
let hasBackendTool = false;
|
||||
let hasFrontendAction = false;
|
||||
let hasUnknown = false;
|
||||
for (const toolCall of toolCalls) {
|
||||
const name = toolCall.name;
|
||||
if (actionNames.has(name)) {
|
||||
hasFrontendAction = true;
|
||||
// Frontend action — handled client-side.
|
||||
continue;
|
||||
}
|
||||
if (backendToolNames.has(name)) {
|
||||
hasBackendTool = true;
|
||||
continue;
|
||||
}
|
||||
// Unknown name: neither a frontend action nor a registered backend
|
||||
// tool. Track it so we can route unknown-bearing batches through
|
||||
// emit_unknown_tools_notice (below), which synthesizes error
|
||||
// ToolMessages for each unknown call and strips them off the
|
||||
// AIMessage so the frontend runtime never sees them.
|
||||
hasUnknown = true;
|
||||
// eslint-disable-next-line no-console
|
||||
console.warn(
|
||||
`[shouldContinue] unknown tool call name '${name}' — will route through emit_unknown_tools_notice unless a known backend tool is also present in this batch`,
|
||||
);
|
||||
}
|
||||
|
||||
// Mixed batch (backend + frontend action): route through the intercept
|
||||
// node first so ToolNode doesn't choke on the frontend-action call,
|
||||
// then tool_node executes backend calls, then chat_node (looped) will
|
||||
// reach END via the restore node.
|
||||
//
|
||||
// Note: if the batch also contains unknown calls, we still prefer
|
||||
// "tool_node" over the unknown-notice path when a backend call is
|
||||
// present — ToolNode itself emits an error ToolMessage for unknown
|
||||
// names and the graph loops back to chat_node with that context.
|
||||
// The unknown-notice path is reserved for batches that would otherwise
|
||||
// end the turn without running tool_node.
|
||||
if (hasBackendTool && hasFrontendAction) {
|
||||
return "intercept_frontend_tools";
|
||||
}
|
||||
if (hasBackendTool) {
|
||||
return "tool_node";
|
||||
}
|
||||
// No backend tool. If the batch carries ANY unknown calls (with or
|
||||
// without frontend actions), route through emit_unknown_tools_notice
|
||||
// so:
|
||||
// (a) error ToolMessages are synthesized for each unknown call,
|
||||
// keeping the AIMessage+ToolMessage sequence well-formed for
|
||||
// OpenAI on the next turn (no dangling tool_calls);
|
||||
// (b) the AIMessage retains its unknown tool_calls alongside the
|
||||
// knownCalls so every errorToolMessage has a matching
|
||||
// preceding tool_call.id. The frontend runtime does not
|
||||
// re-dispatch calls that carry a matching ToolMessage result.
|
||||
// (c) in the frontend-action + unknown mixed case, the surviving
|
||||
// frontend-action calls still reach the frontend via the
|
||||
// terminal restore path (emit_unknown_tools_notice goes to END
|
||||
// and the rebuilt AIMessage retains both the known frontend
|
||||
// calls and the unknown calls, the latter pre-resolved by
|
||||
// their error ToolMessages).
|
||||
if (hasUnknown) {
|
||||
return "emit_unknown_tools_notice";
|
||||
}
|
||||
}
|
||||
|
||||
// All paths that reach here are assistant replies with no pending backend tool_calls.
|
||||
// Route through restore_frontend_tools; it is a no-op when nothing was intercepted.
|
||||
return "restore_frontend_tools";
|
||||
}
|
||||
|
||||
// emit_unknown_tools_notice: when the model emits a tool_calls batch that
|
||||
// includes names the agent cannot dispatch (neither a registered backend
|
||||
// tool nor a frontend action), chat_node's conditional edge routes here.
|
||||
// Responsibilities:
|
||||
//
|
||||
// 1. Synthesize an error ToolMessage for each unknown tool_call that
|
||||
// carries a non-empty `call.id`. Without this, the AIMessage's
|
||||
// unresolved tool_calls leave a dangling tool-use turn — OpenAI
|
||||
// rejects any AIMessage with tool_calls not followed by matching
|
||||
// ToolMessages on the NEXT user turn, poisoning the conversation.
|
||||
// Unknown calls with a missing/empty id are DROPPED from both the
|
||||
// ToolMessage list AND the AIMessage's tool_calls (emitting
|
||||
// `tool_call_id: ""` would itself be rejected; keeping the call on
|
||||
// the AIMessage without a matching ToolMessage re-introduces the
|
||||
// dangling-reference bug).
|
||||
// 2. Rebuild the prior AIMessage with rebuildAIMessageWithToolCalls,
|
||||
// retaining BOTH the knownCalls AND every unknown call whose
|
||||
// tool_call_id was retained in (1). The retained unknowns are
|
||||
// what makes the transcript well-formed: each errorToolMessage
|
||||
// emitted in (1) has a matching `tool_call.id` on the immediately
|
||||
// preceding AIMessage, which is what OpenAI's chat-completions
|
||||
// API validates on the next user turn. Stripping the unknowns
|
||||
// here (as an earlier revision did) while still appending their
|
||||
// error ToolMessages produced orphaned `tool_call_id`s and
|
||||
// "tool_call_id does not match any preceding tool_calls" errors
|
||||
// on the next turn.
|
||||
// Dropped-id unknowns — those with no usable tool_call_id — are
|
||||
// still omitted from tool_calls since they have no matching
|
||||
// ToolMessage result; keeping them would reintroduce the dangling
|
||||
// reference on the next turn.
|
||||
// Safety for the frontend: tool_calls on the AIMessage are
|
||||
// dispatched by the CopilotKit frontend runtime only when the
|
||||
// model streams TOOL_CALL_START / TOOL_CALL_END events in the
|
||||
// current turn. This node does not emit those events — it only
|
||||
// writes to state.messages. On the next turn the frontend sees
|
||||
// each retained unknown paired with its error ToolMessage in the
|
||||
// snapshot; pairs that already carry a result are not
|
||||
// re-dispatched.
|
||||
// 3. In the PURE-unknown batch (`knownCalls.length === 0`), append a
|
||||
// user-visible AIMessage notice so the turn doesn't end silently,
|
||||
// and clear any stale intercept slot from a prior turn.
|
||||
// In the MIXED frontend-action + unknown batch, do NOT append the
|
||||
// notice — the surviving frontend-action tool_calls on
|
||||
// strippedAIMessage need matching ToolMessages on the next turn,
|
||||
// and a trailing AIMessage(notice) produces an ill-formed OpenAI
|
||||
// transcript. The surviving calls reach the frontend via the
|
||||
// outgoing `restore_frontend_tools` → END path.
|
||||
//
|
||||
// Routing: outgoing edge goes to `restore_frontend_tools` (not END).
|
||||
// That node no-ops when the slot is empty, so the pure-unknown case
|
||||
// still terminates cleanly, while the mixed case gets canonical
|
||||
// restore-then-END handling and any prior unflushed stash is cleared.
|
||||
//
|
||||
// Conditional edges are pure routing functions — they cannot mutate
|
||||
// state — so the state rewrite lives here.
|
||||
function emit_unknown_tools_notice(state: AgentState) {
|
||||
const messages = (state.messages ?? []) as unknown as BaseMessage[];
|
||||
const lastMessage: BaseMessage | undefined = messages[messages.length - 1];
|
||||
if (lastMessage === undefined || !isAIMessage(lastMessage)) {
|
||||
return {};
|
||||
}
|
||||
|
||||
// Mirror shouldContinue's partition logic so the same known-set defines
|
||||
// what counts as unknown. `tools` is the backend registry; the frontend
|
||||
// action set comes from state.copilotkit.actions.
|
||||
const frontendActionNames = new Set(
|
||||
(state.copilotkit?.actions ?? []).map((a: { name: string }) => a.name),
|
||||
);
|
||||
const backendToolNames = new Set<string>(tools.map((t) => t.name));
|
||||
|
||||
const allCalls = lastMessage.tool_calls ?? [];
|
||||
const knownCalls: ToolCall[] = [];
|
||||
const unknownCalls: ToolCall[] = [];
|
||||
for (const call of allCalls) {
|
||||
if (frontendActionNames.has(call.name) || backendToolNames.has(call.name)) {
|
||||
knownCalls.push(call);
|
||||
} else {
|
||||
unknownCalls.push(call);
|
||||
}
|
||||
}
|
||||
|
||||
if (unknownCalls.length === 0) {
|
||||
// Nothing unknown to notify about — shouldContinue shouldn't have
|
||||
// routed here, but be defensive.
|
||||
return {};
|
||||
}
|
||||
|
||||
// Partition unknowns by whether they carry a usable tool_call_id.
|
||||
// OpenAI rejects ToolMessages whose `tool_call_id` doesn't match a
|
||||
// preceding AIMessage tool_call id — including empty strings. The
|
||||
// only safe handling for an unknown tool_call with a missing/empty
|
||||
// id is to DROP IT from both the error ToolMessage list AND the
|
||||
// AIMessage's tool_calls (so no dangling reference remains). This
|
||||
// mirrors `deleteProverb`'s refusal to emit `tool_call_id: ""`.
|
||||
const unknownWithId: ToolCall[] = [];
|
||||
for (const call of unknownCalls) {
|
||||
const id = call.id;
|
||||
if (typeof id === "string" && id.length > 0) {
|
||||
unknownWithId.push(call);
|
||||
} else {
|
||||
// eslint-disable-next-line no-console
|
||||
console.warn(
|
||||
`[emit_unknown_tools_notice] unknown tool_call '${call.name}' has no id; dropping from both errorToolMessages and strippedAIMessage.tool_calls to avoid emitting a ToolMessage with empty tool_call_id`,
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
// If every unknown call lacked an id, `unknownWithId` is empty and
|
||||
// `errorToolMessages` below will be empty — the AIMessage retains
|
||||
// only `knownCalls` and we still emit the notice in the pure-unknown
|
||||
// case below (drop-only is still a reportable turn).
|
||||
|
||||
// Rebuild the prior AIMessage preserving its id + metadata, retaining
|
||||
// BOTH knownCalls AND unknownWithId on `tool_calls`. Retaining the
|
||||
// unknowns is what keeps the OpenAI transcript well-formed on the
|
||||
// next user turn: every errorToolMessage below references an id
|
||||
// that still appears on the immediately preceding AIMessage's
|
||||
// `tool_calls`. Stripping the unknowns while still emitting their
|
||||
// error ToolMessages produced orphaned `tool_call_id`s — OpenAI's
|
||||
// chat completions API rejects a ToolMessage whose `tool_call_id`
|
||||
// does not match a preceding AIMessage `tool_call.id`, so the next
|
||||
// user turn failed. With the unknowns retained, the AIMessage →
|
||||
// ToolMessage(result) pairing is intact for every unknown.
|
||||
//
|
||||
// Safety for the frontend: the frontend action handler only
|
||||
// dispatches a tool_call when it receives a live TOOL_CALL_START /
|
||||
// TOOL_CALL_END event stream during the current agent turn. This
|
||||
// node DOES NOT emit those events — it only writes to state.messages
|
||||
// after the model stream is already finalized. On the next turn,
|
||||
// the frontend sees the pair (AIMessage.tool_call + ToolMessage
|
||||
// result) already present in the snapshot; pairs that carry a
|
||||
// result are treated as resolved and are not re-dispatched.
|
||||
//
|
||||
// Dropped-id unknowns (no usable tool_call_id) are still omitted
|
||||
// from tool_calls — they have no matching ToolMessage, so keeping
|
||||
// them would reintroduce the dangling-id problem on the next turn.
|
||||
const retainedCalls: ToolCall[] = [...knownCalls, ...unknownWithId];
|
||||
const strippedAIMessage = rebuildAIMessageWithToolCalls(
|
||||
lastMessage,
|
||||
retainedCalls,
|
||||
);
|
||||
|
||||
const errorToolMessages = unknownWithId.map((call) => {
|
||||
return new ToolMessage({
|
||||
status: "error",
|
||||
name: call.name,
|
||||
// Narrowed: unknownWithId only contains calls whose id is a
|
||||
// non-empty string.
|
||||
tool_call_id: call.id as string,
|
||||
content: `Tool '${call.name}' is not available in this environment.`,
|
||||
});
|
||||
});
|
||||
|
||||
// Mixed frontend-action + unknown batch: the surviving knownCalls
|
||||
// are frontend-action calls that still need to reach the frontend
|
||||
// runtime. Appending an `AIMessage(notice)` here would leave
|
||||
// strippedAIMessage's frontend-action tool_calls with no matching
|
||||
// ToolMessages before the trailing notice, producing an ill-formed
|
||||
// OpenAI transcript on replay. Instead, suppress the notice in the
|
||||
// mixed case and let the outgoing edge route the surviving calls
|
||||
// through `restore_frontend_tools` → END for normal dispatch.
|
||||
//
|
||||
// Pure-unknown batch (`knownCalls.length === 0`): emit the notice
|
||||
// as before so the turn doesn't end silently.
|
||||
const unknownNames = unknownCalls.map((c) => c.name);
|
||||
const trailingMessages: BaseMessage[] =
|
||||
knownCalls.length === 0
|
||||
? [
|
||||
new AIMessage({
|
||||
content: `I tried to call tools that aren't available in this environment (${unknownNames.join(
|
||||
", ",
|
||||
)}). Cancelling this turn.`,
|
||||
}),
|
||||
]
|
||||
: [];
|
||||
|
||||
// Always clear any prior-turn intercept slot before routing to
|
||||
// `restore_frontend_tools`. Gating the clear on `knownCalls.length === 0`
|
||||
// is incorrect: in a MIXED batch (knownCalls.length > 0) the surviving
|
||||
// frontend-action calls ride the stripped AIMessage to `restore_frontend_tools`,
|
||||
// which consumes `interceptedToolCalls` + `originalAIMessageId`. If a stale
|
||||
// stash from a PRIOR turn still sits in that slot, it would be grafted
|
||||
// onto an unrelated AIMessage in THIS turn. Clearing unconditionally
|
||||
// guarantees restore_frontend_tools only sees state stashed for the
|
||||
// current turn (which, from this node, is always empty — no stash is
|
||||
// written here).
|
||||
const slotClear: Partial<AgentState> = {
|
||||
interceptedToolCalls: undefined,
|
||||
originalAIMessageId: undefined,
|
||||
};
|
||||
|
||||
// Sequence on the channel (mixed case):
|
||||
// [...existing..., strippedAIMessage (replaces lastMessage),
|
||||
// ToolMessage(unknown1), ..., ToolMessage(unknownN)]
|
||||
// Pure-unknown case appends a trailing AIMessage(notice).
|
||||
return {
|
||||
messages: [
|
||||
...messages.slice(0, -1),
|
||||
strippedAIMessage,
|
||||
...errorToolMessages,
|
||||
...trailingMessages,
|
||||
],
|
||||
...slotClear,
|
||||
} as unknown as Partial<AgentState>;
|
||||
}
|
||||
|
||||
const workflow = new StateGraph(AgentStateAnnotation)
|
||||
.addNode("chat_node", chat_node)
|
||||
.addNode("tool_node", new ToolNode(tools))
|
||||
.addNode("intercept_frontend_tools", intercept_frontend_tools)
|
||||
.addNode("restore_frontend_tools", restore_frontend_tools)
|
||||
.addNode("emit_unknown_tools_notice", emit_unknown_tools_notice)
|
||||
.addEdge(START, "chat_node")
|
||||
.addEdge("intercept_frontend_tools", "tool_node")
|
||||
.addEdge("tool_node", "chat_node")
|
||||
.addEdge("restore_frontend_tools", END)
|
||||
// Route through `restore_frontend_tools` (not END) so any prior
|
||||
// unflushed intercept stash is cleared and any surviving
|
||||
// frontend-action tool_calls retained on the stripped AIMessage in
|
||||
// the mixed-batch case are reattached via the canonical restore
|
||||
// path before termination. `restore_frontend_tools` no-ops when the
|
||||
// slot is empty, so the pure-unknown case still terminates cleanly.
|
||||
.addEdge("emit_unknown_tools_notice", "restore_frontend_tools")
|
||||
.addConditionalEdges("chat_node", shouldContinue);
|
||||
|
||||
const memory = new MemorySaver();
|
||||
|
||||
export const graph = workflow.compile({
|
||||
checkpointer: memory,
|
||||
});
|
||||
@@ -0,0 +1,15 @@
|
||||
{
|
||||
"compilerOptions": {
|
||||
"target": "ES2022",
|
||||
"lib": ["ES2022"],
|
||||
"module": "Node16",
|
||||
"moduleResolution": "node16",
|
||||
"resolvePackageJsonExports": true,
|
||||
"resolvePackageJsonImports": true,
|
||||
"esModuleInterop": true,
|
||||
"forceConsistentCasingInFileNames": true,
|
||||
"strict": true,
|
||||
"skipLibCheck": true,
|
||||
"noEmit": true
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,18 @@
|
||||
# LangGraph deployment URL (required in production, defaults to http://localhost:8125 in dev)
|
||||
# LANGGRAPH_DEPLOYMENT_URL=
|
||||
|
||||
# LANGSMITH_* variables below are primarily consumed by the agent /
|
||||
# LangGraph deployment at deploy time (set them in the agent's
|
||||
# environment, e.g. the LangGraph Cloud deployment or `apps/agent/.env`).
|
||||
# The Next.js web app itself only observes LANGSMITH_API_KEY here to
|
||||
# emit a dev-only "missing key" warning and to forward the key through
|
||||
# to the LangGraphAgent client in apps/web/src/app/api/copilotkit/route.ts.
|
||||
|
||||
# LangSmith API key (optional, for production tracing)
|
||||
# LANGSMITH_API_KEY=
|
||||
|
||||
# Enable LangSmith tracing (optional)
|
||||
# LANGSMITH_TRACING=true
|
||||
|
||||
# LangSmith project name (optional; used by LangSmith tracing if LANGSMITH_TRACING=true)
|
||||
# LANGSMITH_PROJECT=interrupts-langgraph
|
||||
@@ -0,0 +1,23 @@
|
||||
import nextCoreWebVitals from "eslint-config-next/core-web-vitals";
|
||||
import nextTypescript from "eslint-config-next/typescript";
|
||||
|
||||
// Flat-config ESLint setup for Next 16 / React 19 / TS 5. Mirrors the
|
||||
// sibling `examples/showcases/open-mcp-client/apps/web/eslint.config.mjs`
|
||||
// so lint behaviour stays consistent across starters. Next 16 removed
|
||||
// the `next lint` command, so package.json now invokes `eslint .`
|
||||
// directly against this config.
|
||||
const eslintConfig = [
|
||||
...nextCoreWebVitals,
|
||||
...nextTypescript,
|
||||
{
|
||||
ignores: [
|
||||
"node_modules/**",
|
||||
".next/**",
|
||||
"out/**",
|
||||
"build/**",
|
||||
"next-env.d.ts",
|
||||
],
|
||||
},
|
||||
];
|
||||
|
||||
export default eslintConfig;
|
||||
@@ -0,0 +1,7 @@
|
||||
import type { NextConfig } from "next";
|
||||
|
||||
const nextConfig: NextConfig = {
|
||||
serverExternalPackages: ["@copilotkit/runtime"],
|
||||
};
|
||||
|
||||
export default nextConfig;
|
||||
@@ -0,0 +1,42 @@
|
||||
{
|
||||
"name": "web-langgraph-interrupt",
|
||||
"version": "0.1.7",
|
||||
"private": true,
|
||||
"scripts": {
|
||||
"dev": "next dev",
|
||||
"build": "next build",
|
||||
"start": "next start",
|
||||
"lint": "eslint . --max-warnings=0"
|
||||
},
|
||||
"dependencies": {
|
||||
"@copilotkit/react-core": "workspace:*",
|
||||
"@copilotkit/react-ui": "workspace:*",
|
||||
"@copilotkit/runtime": "workspace:*",
|
||||
"next": "16.0.8",
|
||||
"react": "^19.2.1",
|
||||
"react-dom": "^19.2.1",
|
||||
"shiki": "^3.22.0",
|
||||
"zod": "^3.25.76"
|
||||
},
|
||||
"devDependencies": {
|
||||
"@eslint/eslintrc": "^3",
|
||||
"@tailwindcss/postcss": "^4",
|
||||
"@types/node": "^22.19.11",
|
||||
"@types/react": "^19",
|
||||
"@types/react-dom": "^19",
|
||||
"eslint": "^9",
|
||||
"eslint-config-next": "16.0.8",
|
||||
"tailwindcss": "^4",
|
||||
"typescript": "^5.9.3"
|
||||
},
|
||||
"engines": {
|
||||
"node": ">=20.0.0"
|
||||
},
|
||||
"nx": {
|
||||
"targets": {
|
||||
"build": {
|
||||
"cache": false
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,5 @@
|
||||
const config = {
|
||||
plugins: ["@tailwindcss/postcss"],
|
||||
};
|
||||
|
||||
export default config;
|
||||
@@ -0,0 +1,28 @@
|
||||
{
|
||||
"name": "web-langgraph-interrupt",
|
||||
"$schema": "../../node_modules/nx/schemas/project-schema.json",
|
||||
"sourceRoot": "apps/web/src",
|
||||
"projectType": "application",
|
||||
"targets": {
|
||||
"dev": {
|
||||
"executor": "nx:run-commands",
|
||||
"options": {
|
||||
"command": "pnpm --filter web-langgraph-interrupt dev"
|
||||
}
|
||||
},
|
||||
"build": {
|
||||
"executor": "nx:run-commands",
|
||||
"cache": false,
|
||||
"options": {
|
||||
"command": "pnpm --filter web-langgraph-interrupt build"
|
||||
}
|
||||
},
|
||||
"lint": {
|
||||
"executor": "nx:run-commands",
|
||||
"options": {
|
||||
"command": "pnpm --filter web-langgraph-interrupt lint"
|
||||
}
|
||||
}
|
||||
},
|
||||
"tags": []
|
||||
}
|
||||
@@ -0,0 +1 @@
|
||||
<svg fill="none" viewBox="0 0 16 16" xmlns="http://www.w3.org/2000/svg"><path d="M14.5 13.5V5.41a1 1 0 0 0-.3-.7L9.8.29A1 1 0 0 0 9.08 0H1.5v13.5A2.5 2.5 0 0 0 4 16h8a2.5 2.5 0 0 0 2.5-2.5m-1.5 0v-7H8v-5H3v12a1 1 0 0 0 1 1h8a1 1 0 0 0 1-1M9.5 5V2.12L12.38 5zM5.13 5h-.62v1.25h2.12V5zm-.62 3h7.12v1.25H4.5zm.62 3h-.62v1.25h7.12V11z" clip-rule="evenodd" fill="#666" fill-rule="evenodd"/></svg>
|
||||
|
After Width: | Height: | Size: 391 B |
@@ -0,0 +1 @@
|
||||
<svg fill="none" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16"><g clip-path="url(#a)"><path fill-rule="evenodd" clip-rule="evenodd" d="M10.27 14.1a6.5 6.5 0 0 0 3.67-3.45q-1.24.21-2.7.34-.31 1.83-.97 3.1M8 16A8 8 0 1 0 8 0a8 8 0 0 0 0 16m.48-1.52a7 7 0 0 1-.96 0H7.5a4 4 0 0 1-.84-1.32q-.38-.89-.63-2.08a40 40 0 0 0 3.92 0q-.25 1.2-.63 2.08a4 4 0 0 1-.84 1.31zm2.94-4.76q1.66-.15 2.95-.43a7 7 0 0 0 0-2.58q-1.3-.27-2.95-.43a18 18 0 0 1 0 3.44m-1.27-3.54a17 17 0 0 1 0 3.64 39 39 0 0 1-4.3 0 17 17 0 0 1 0-3.64 39 39 0 0 1 4.3 0m1.1-1.17q1.45.13 2.69.34a6.5 6.5 0 0 0-3.67-3.44q.65 1.26.98 3.1M8.48 1.5l.01.02q.41.37.84 1.31.38.89.63 2.08a40 40 0 0 0-3.92 0q.25-1.2.63-2.08a4 4 0 0 1 .85-1.32 7 7 0 0 1 .96 0m-2.75.4a6.5 6.5 0 0 0-3.67 3.44 29 29 0 0 1 2.7-.34q.31-1.83.97-3.1M4.58 6.28q-1.66.16-2.95.43a7 7 0 0 0 0 2.58q1.3.27 2.95.43a18 18 0 0 1 0-3.44m.17 4.71q-1.45-.12-2.69-.34a6.5 6.5 0 0 0 3.67 3.44q-.65-1.27-.98-3.1" fill="#666"/></g><defs><clipPath id="a"><path fill="#fff" d="M0 0h16v16H0z"/></clipPath></defs></svg>
|
||||
|
After Width: | Height: | Size: 1.0 KiB |
@@ -0,0 +1 @@
|
||||
<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 394 80"><path fill="#000" d="M262 0h68.5v12.7h-27.2v66.6h-13.6V12.7H262V0ZM149 0v12.7H94v20.4h44.3v12.6H94v21h55v12.6H80.5V0h68.7zm34.3 0h-17.8l63.8 79.4h17.9l-32-39.7 32-39.6h-17.9l-23 28.6-23-28.6zm18.3 56.7-9-11-27.1 33.7h17.8l18.3-22.7z"/><path fill="#000" d="M81 79.3 17 0H0v79.3h13.6V17l50.2 62.3H81Zm252.6-.4c-1 0-1.8-.4-2.5-1s-1.1-1.6-1.1-2.6.3-1.8 1-2.5 1.6-1 2.6-1 1.8.3 2.5 1a3.4 3.4 0 0 1 .6 4.3 3.7 3.7 0 0 1-3 1.8zm23.2-33.5h6v23.3c0 2.1-.4 4-1.3 5.5a9.1 9.1 0 0 1-3.8 3.5c-1.6.8-3.5 1.3-5.7 1.3-2 0-3.7-.4-5.3-1s-2.8-1.8-3.7-3.2c-.9-1.3-1.4-3-1.4-5h6c.1.8.3 1.6.7 2.2s1 1.2 1.6 1.5c.7.4 1.5.5 2.4.5 1 0 1.8-.2 2.4-.6a4 4 0 0 0 1.6-1.8c.3-.8.5-1.8.5-3V45.5zm30.9 9.1a4.4 4.4 0 0 0-2-3.3 7.5 7.5 0 0 0-4.3-1.1c-1.3 0-2.4.2-3.3.5-.9.4-1.6 1-2 1.6a3.5 3.5 0 0 0-.3 4c.3.5.7.9 1.3 1.2l1.8 1 2 .5 3.2.8c1.3.3 2.5.7 3.7 1.2a13 13 0 0 1 3.2 1.8 8.1 8.1 0 0 1 3 6.5c0 2-.5 3.7-1.5 5.1a10 10 0 0 1-4.4 3.5c-1.8.8-4.1 1.2-6.8 1.2-2.6 0-4.9-.4-6.8-1.2-2-.8-3.4-2-4.5-3.5a10 10 0 0 1-1.7-5.6h6a5 5 0 0 0 3.5 4.6c1 .4 2.2.6 3.4.6 1.3 0 2.5-.2 3.5-.6 1-.4 1.8-1 2.4-1.7a4 4 0 0 0 .8-2.4c0-.9-.2-1.6-.7-2.2a11 11 0 0 0-2.1-1.4l-3.2-1-3.8-1c-2.8-.7-5-1.7-6.6-3.2a7.2 7.2 0 0 1-2.4-5.7 8 8 0 0 1 1.7-5 10 10 0 0 1 4.3-3.5c2-.8 4-1.2 6.4-1.2 2.3 0 4.4.4 6.2 1.2 1.8.8 3.2 2 4.3 3.4 1 1.4 1.5 3 1.5 5h-5.8z"/></svg>
|
||||
|
After Width: | Height: | Size: 1.3 KiB |
@@ -0,0 +1 @@
|
||||
<svg fill="none" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1155 1000"><path d="m577.3 0 577.4 1000H0z" fill="#fff"/></svg>
|
||||
|
After Width: | Height: | Size: 128 B |
@@ -0,0 +1 @@
|
||||
<svg fill="none" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16"><path fill-rule="evenodd" clip-rule="evenodd" d="M1.5 2.5h13v10a1 1 0 0 1-1 1h-11a1 1 0 0 1-1-1zM0 1h16v11.5a2.5 2.5 0 0 1-2.5 2.5h-11A2.5 2.5 0 0 1 0 12.5zm3.75 4.5a.75.75 0 1 0 0-1.5.75.75 0 0 0 0 1.5M7 4.75a.75.75 0 1 1-1.5 0 .75.75 0 0 1 1.5 0m1.75.75a.75.75 0 1 0 0-1.5.75.75 0 0 0 0 1.5" fill="#666"/></svg>
|
||||
|
After Width: | Height: | Size: 385 B |
@@ -0,0 +1,149 @@
|
||||
import {
|
||||
CopilotRuntime,
|
||||
ExperimentalEmptyAdapter,
|
||||
copilotRuntimeNextJSAppRouterEndpoint,
|
||||
} from "@copilotkit/runtime";
|
||||
import { LangGraphAgent } from "@copilotkit/runtime/langgraph";
|
||||
import { NextRequest, NextResponse } from "next/server";
|
||||
|
||||
// 1. Runtime adapter. Since this starter wires agent responses directly
|
||||
// (no OpenAI/Anthropic-compatible chat-completions fallback), we use
|
||||
// the empty adapter: it satisfies the runtime interface without
|
||||
// dispatching any LLM requests of its own.
|
||||
const serviceAdapter = new ExperimentalEmptyAdapter();
|
||||
|
||||
// 2. LANGGRAPH_DEPLOYMENT_URL handling. In development we fall back to
|
||||
// localhost:8125 (the port this starter's LangGraph dev server uses —
|
||||
// see apps/agent/package.json) and warn so the developer sees it. In
|
||||
// production a missing URL is almost always a misconfiguration — but
|
||||
// we defer the hard failure to the first request (see POST below)
|
||||
// rather than throwing at module load. `next build` evaluates route
|
||||
// modules with NODE_ENV=production during route collection, while
|
||||
// runtime-only env vars (Vercel secrets, Railway env, Docker ENV at
|
||||
// container start) are NOT injected at build time. Throwing at module
|
||||
// load would abort otherwise-valid production builds.
|
||||
if (
|
||||
!process.env.LANGGRAPH_DEPLOYMENT_URL &&
|
||||
process.env.NODE_ENV !== "production"
|
||||
) {
|
||||
console.warn(
|
||||
"[copilotkit/route] LANGGRAPH_DEPLOYMENT_URL is not set; falling back to http://localhost:8125. Set LANGGRAPH_DEPLOYMENT_URL in production.",
|
||||
);
|
||||
}
|
||||
|
||||
// LangSmith is optional; warn once at module load so a missing key
|
||||
// surfaces in logs. When absent we omit the langsmithApiKey field
|
||||
// entirely rather than passing "" — omitting the field disables
|
||||
// LangSmith tracing cleanly; passing an empty string may be forwarded
|
||||
// to the SDK. Gate the warn on NODE_ENV so it does not fire during
|
||||
// `next build` in CI (same rationale as the DEPLOYMENT_URL warn above).
|
||||
if (!process.env.LANGSMITH_API_KEY && process.env.NODE_ENV !== "production") {
|
||||
console.warn(
|
||||
"[copilotkit/route] LANGSMITH_API_KEY is not set; LangSmith tracing is disabled for this session.",
|
||||
);
|
||||
}
|
||||
|
||||
// 3. Lazy runtime construction. We build the LangGraphAgent + runtime +
|
||||
// handler on the first request rather than at module load, so that
|
||||
// `next build` (which evaluates this file with NODE_ENV=production but
|
||||
// without runtime env vars) does not bake the fallback localhost URL
|
||||
// into the compiled artifact. The cached closure keeps per-request
|
||||
// overhead at the same single-allocation cost as the eager form.
|
||||
// Matches the signature returned by copilotRuntimeNextJSAppRouterEndpoint:
|
||||
// `(req: Request) => Response | Promise<Response>`. NextRequest extends
|
||||
// Request, so the POST handler below can still pass its req through
|
||||
// without an explicit cast.
|
||||
let cachedHandleRequest:
|
||||
| ((req: Request) => Response | Promise<Response>)
|
||||
| null = null;
|
||||
|
||||
const getHandleRequest = () => {
|
||||
if (cachedHandleRequest) return cachedHandleRequest;
|
||||
|
||||
const deploymentUrl = process.env.LANGGRAPH_DEPLOYMENT_URL;
|
||||
if (!deploymentUrl && process.env.NODE_ENV === "production") {
|
||||
throw new Error(
|
||||
"[copilotkit/route] LANGGRAPH_DEPLOYMENT_URL is required in production. " +
|
||||
"Set it to the deployed LangGraph endpoint for this starter.",
|
||||
);
|
||||
}
|
||||
|
||||
const agent = new LangGraphAgent({
|
||||
deploymentUrl: deploymentUrl || "http://localhost:8125",
|
||||
graphId: "default",
|
||||
// Only pass langsmithApiKey when it's a non-empty string; omitting
|
||||
// the field disables LangSmith tracing without asking the SDK to
|
||||
// authenticate with an empty key.
|
||||
...(process.env.LANGSMITH_API_KEY
|
||||
? { langsmithApiKey: process.env.LANGSMITH_API_KEY }
|
||||
: {}),
|
||||
});
|
||||
|
||||
// Register the single LangGraph agent under the `default` name, which
|
||||
// matches the <CopilotKit agent="default"> prop in layout.tsx. If you
|
||||
// need to expose this agent under an additional id (e.g. when pointing
|
||||
// a second frontend at this runtime), add another entry here and
|
||||
// update the corresponding <CopilotKit agent="..."> prop.
|
||||
const runtime = new CopilotRuntime({
|
||||
agents: {
|
||||
default: agent,
|
||||
},
|
||||
});
|
||||
|
||||
const { handleRequest } = copilotRuntimeNextJSAppRouterEndpoint({
|
||||
runtime,
|
||||
serviceAdapter,
|
||||
endpoint: "/api/copilotkit",
|
||||
});
|
||||
|
||||
cachedHandleRequest = handleRequest;
|
||||
return handleRequest;
|
||||
};
|
||||
|
||||
// 4. POST handler. Resolves the cached handler (building it on first
|
||||
// request), then dispatches. Wrap in try/catch so unhandled exceptions
|
||||
// surface as a structured 500 rather than a raw Next.js error page,
|
||||
// and log the failure for observability. Errors inside the streaming
|
||||
// response are handled by the runtime itself.
|
||||
export const POST = async (req: NextRequest) => {
|
||||
// Redact `detail` in production: raw error messages can leak
|
||||
// internals (stack-adjacent strings, paths, env-var names). Keep
|
||||
// the full detail in non-production builds so developers see the
|
||||
// real cause locally.
|
||||
const isProd = process.env.NODE_ENV === "production";
|
||||
|
||||
// Split construction vs dispatch into two try/catch regions so
|
||||
// logs distinguish runtime-construction failures (bad config / env)
|
||||
// from dispatch failures inside handleRequest. Response shape is
|
||||
// unchanged between the two.
|
||||
let handleRequest: (req: Request) => Response | Promise<Response>;
|
||||
try {
|
||||
handleRequest = getHandleRequest();
|
||||
} catch (err) {
|
||||
console.error("[copilotkit/route] runtime construction failed:", err);
|
||||
return NextResponse.json(
|
||||
{
|
||||
error: "Internal error while dispatching CopilotKit request.",
|
||||
...(isProd
|
||||
? {}
|
||||
: { detail: err instanceof Error ? err.message : String(err) }),
|
||||
},
|
||||
{ status: 500 },
|
||||
);
|
||||
}
|
||||
|
||||
try {
|
||||
return await handleRequest(req);
|
||||
} catch (err) {
|
||||
console.error("[copilotkit/route] handleRequest dispatch failed:", err);
|
||||
return NextResponse.json(
|
||||
{
|
||||
error: "Internal error while dispatching CopilotKit request.",
|
||||
...(isProd
|
||||
? {}
|
||||
: { detail: err instanceof Error ? err.message : String(err) }),
|
||||
},
|
||||
{ status: 500 },
|
||||
);
|
||||
}
|
||||
};
|
||||
Binary file not shown.
|
After Width: | Height: | Size: 25 KiB |
@@ -0,0 +1,24 @@
|
||||
@import "tailwindcss";
|
||||
|
||||
:root {
|
||||
--background: #ffffff;
|
||||
--foreground: #171717;
|
||||
}
|
||||
|
||||
@media (prefers-color-scheme: dark) {
|
||||
:root {
|
||||
--background: #0a0a0a;
|
||||
--foreground: #ededed;
|
||||
}
|
||||
}
|
||||
|
||||
body {
|
||||
background: var(--background);
|
||||
color: var(--foreground);
|
||||
font-family: Arial, Helvetica, sans-serif;
|
||||
}
|
||||
|
||||
body,
|
||||
html {
|
||||
height: 100%;
|
||||
}
|
||||
@@ -0,0 +1,27 @@
|
||||
import type { Metadata } from "next";
|
||||
|
||||
import { CopilotKit } from "@copilotkit/react-core";
|
||||
import "./globals.css";
|
||||
import "@copilotkit/react-ui/styles.css";
|
||||
|
||||
export const metadata: Metadata = {
|
||||
title: "CopilotKit LangGraph Interrupts Starter",
|
||||
description:
|
||||
"A starter template for building AI agents with human-in-the-loop interrupts using LangGraph and CopilotKit.",
|
||||
};
|
||||
|
||||
export default function RootLayout({
|
||||
children,
|
||||
}: Readonly<{
|
||||
children: React.ReactNode;
|
||||
}>) {
|
||||
return (
|
||||
<html lang="en">
|
||||
<body className={"antialiased"}>
|
||||
<CopilotKit runtimeUrl="/api/copilotkit" agent="default">
|
||||
{children}
|
||||
</CopilotKit>
|
||||
</body>
|
||||
</html>
|
||||
);
|
||||
}
|
||||
@@ -0,0 +1,398 @@
|
||||
"use client";
|
||||
|
||||
import { useCoAgent, useCopilotAction } from "@copilotkit/react-core";
|
||||
import { CopilotKitCSSProperties, CopilotSidebar } from "@copilotkit/react-ui";
|
||||
import { useInterrupt } from "@copilotkit/react-core/v2";
|
||||
import { useState } from "react";
|
||||
|
||||
export default function CopilotKitPage() {
|
||||
const [themeColor, setThemeColor] = useState("#6366f1");
|
||||
|
||||
// 🪁 Frontend Actions: https://docs.copilotkit.ai/guides/frontend-actions
|
||||
useCopilotAction(
|
||||
{
|
||||
name: "setThemeColor",
|
||||
description: "Set the theme color of the page.",
|
||||
parameters: [
|
||||
{
|
||||
name: "themeColor",
|
||||
type: "string",
|
||||
description: "The theme color to set. Make sure to pick nice colors.",
|
||||
required: true,
|
||||
},
|
||||
],
|
||||
handler({ themeColor }) {
|
||||
// Defensive guard: during streaming, the LLM may invoke the handler
|
||||
// before the `themeColor` arg has fully arrived. Skipping the update
|
||||
// here avoids writing `undefined` into the CSS custom property, which
|
||||
// would collapse the --copilot-kit-primary-color variable.
|
||||
if (typeof themeColor !== "string" || themeColor.length === 0) return;
|
||||
setThemeColor(themeColor);
|
||||
},
|
||||
},
|
||||
[setThemeColor],
|
||||
);
|
||||
|
||||
// 🪁 Interrupts: Handle human-in-the-loop confirmations from the agent
|
||||
// https://docs.copilotkit.ai/coagents/human-in-the-loop (useInterrupt)
|
||||
//
|
||||
// The agent emits interrupt payloads shaped as
|
||||
// { action: "delete_proverb"; proverb: string; message: string }
|
||||
// Today the only supported action is delete_proverb. When future
|
||||
// actions are added, widen InterruptPayload to a discriminated union
|
||||
// on `action` and extend APPROVE_LABELS below — TypeScript will flag
|
||||
// the missing key as a compile error because APPROVE_LABELS is typed
|
||||
// as Record<InterruptPayload["action"], string>.
|
||||
useInterrupt({
|
||||
render: ({ event, resolve }) => {
|
||||
const parsed = parseInterruptPayload(event.value);
|
||||
if (!parsed.ok) {
|
||||
// Unknown/malformed payload shape. Surface a generic fallback
|
||||
// rather than crashing on an unchecked cast. Resolving with a
|
||||
// cancellation unblocks the agent in case the user dismisses it.
|
||||
// Log the reason + raw payload so developers can diagnose
|
||||
// schema drift from the agent side — the UI shows "unknown"
|
||||
// without this, which is useless for debugging. The parser
|
||||
// itself does not log, so this is the single log line for
|
||||
// the whole failure path.
|
||||
console.error(
|
||||
"[interrupts-langgraph] Unknown interrupt payload shape:",
|
||||
parsed.reason,
|
||||
event.value,
|
||||
);
|
||||
return (
|
||||
<div className="bg-red-50 border border-red-200 rounded-lg p-4 my-2">
|
||||
<p className="text-sm text-red-800">
|
||||
Received an unknown interrupt payload. This will tell the agent to
|
||||
cancel.
|
||||
</p>
|
||||
<button
|
||||
onClick={() => resolve({ approved: false })}
|
||||
className="mt-2 px-3 py-1.5 text-sm font-medium text-gray-700 bg-gray-100 hover:bg-gray-200 rounded-md transition-colors"
|
||||
>
|
||||
Cancel request
|
||||
</button>
|
||||
</div>
|
||||
);
|
||||
}
|
||||
|
||||
// Resolve the button label for this action.
|
||||
const payload = parsed.value;
|
||||
const approveLabel = APPROVE_LABELS[payload.action];
|
||||
|
||||
return (
|
||||
<div className="bg-yellow-50 border border-yellow-200 rounded-lg p-4 my-2">
|
||||
<p className="text-sm font-medium text-yellow-800 mb-1">
|
||||
Confirmation Required
|
||||
</p>
|
||||
<p className="text-sm text-yellow-700 mb-3">{payload.message}</p>
|
||||
<div className="flex gap-2">
|
||||
<button
|
||||
onClick={() => resolve({ approved: true })}
|
||||
className="px-3 py-1.5 text-sm font-medium text-white bg-red-500 hover:bg-red-600 rounded-md transition-colors"
|
||||
>
|
||||
{approveLabel}
|
||||
</button>
|
||||
<button
|
||||
onClick={() => resolve({ approved: false })}
|
||||
className="px-3 py-1.5 text-sm font-medium text-gray-700 bg-gray-100 hover:bg-gray-200 rounded-md transition-colors"
|
||||
>
|
||||
Cancel
|
||||
</button>
|
||||
</div>
|
||||
</div>
|
||||
);
|
||||
},
|
||||
});
|
||||
|
||||
return (
|
||||
<main
|
||||
style={
|
||||
{ "--copilot-kit-primary-color": themeColor } as CopilotKitCSSProperties
|
||||
}
|
||||
>
|
||||
<YourMainContent themeColor={themeColor} />
|
||||
<CopilotSidebar
|
||||
clickOutsideToClose={false}
|
||||
defaultOpen={true}
|
||||
labels={{
|
||||
title: "Popup Assistant",
|
||||
initial:
|
||||
'👋 Hi, there! You\'re chatting with an agent. This agent comes with a few tools to get you started.\n\nFor example you can try:\n- **Frontend Tools**: "Set the theme to orange"\n- **Shared State**: "Write a proverb about AI"\n- **Generative UI**: "Get the weather in SF"\n- **Interrupts**: "Delete the first proverb" (will ask for confirmation)\n\nAs you interact with the agent, you\'ll see the UI update in real-time to reflect the agent\'s **state**, **tool calls**, and **progress**.',
|
||||
}}
|
||||
/>
|
||||
</main>
|
||||
);
|
||||
}
|
||||
|
||||
// Partial view of the agent state the UI reads + writes. The agent's
|
||||
// full state is defined in apps/agent/src/agent.ts (AgentStateAnnotation);
|
||||
// this type intentionally declares only the subset the UI consumes. Keep
|
||||
// the field names and types in sync with the agent side.
|
||||
type AgentState = {
|
||||
proverbs: string[];
|
||||
};
|
||||
|
||||
// Shape of interrupt payloads produced by deleteProverb on the agent
|
||||
// side. Validated at runtime by `parseInterruptPayload` below. Kept
|
||||
// close to the consumer so divergence surfaces in the renderer where
|
||||
// it's used.
|
||||
type InterruptPayload = {
|
||||
action: "delete_proverb";
|
||||
proverb: string;
|
||||
message: string;
|
||||
};
|
||||
|
||||
// Approve-button label per interrupt action. Typed exhaustively against
|
||||
// InterruptPayload["action"] so adding a new action anywhere else in the
|
||||
// file is a compile error until this map is extended.
|
||||
const APPROVE_LABELS: Record<InterruptPayload["action"], string> = {
|
||||
delete_proverb: "Yes, delete it",
|
||||
};
|
||||
|
||||
// Result type surfaces the first failed predicate as a stable reason
|
||||
// string so the caller can log a single message containing both the
|
||||
// reason and the raw value. The parser itself does no logging — the
|
||||
// renderer owns the single log line (avoids the prior double-log).
|
||||
type ParseResult =
|
||||
| { ok: true; value: InterruptPayload }
|
||||
| { ok: false; reason: string };
|
||||
|
||||
function parseInterruptPayload(value: unknown): ParseResult {
|
||||
if (value === null || typeof value !== "object" || Array.isArray(value)) {
|
||||
return { ok: false, reason: "payload is not object" };
|
||||
}
|
||||
const v = value as Record<string, unknown>;
|
||||
if (v.action !== "delete_proverb") {
|
||||
return { ok: false, reason: "action mismatch" };
|
||||
}
|
||||
if (typeof v.proverb !== "string") {
|
||||
return { ok: false, reason: "proverb not string" };
|
||||
}
|
||||
if (typeof v.message !== "string") {
|
||||
return { ok: false, reason: "message not string" };
|
||||
}
|
||||
return {
|
||||
ok: true,
|
||||
value: {
|
||||
action: "delete_proverb",
|
||||
proverb: v.proverb,
|
||||
message: v.message,
|
||||
},
|
||||
};
|
||||
}
|
||||
|
||||
function YourMainContent({ themeColor }: { themeColor: string }) {
|
||||
// 🪁 Shared State: https://docs.copilotkit.ai/coagents/shared-state
|
||||
const { state, setState } = useCoAgent<AgentState>({
|
||||
name: "default",
|
||||
initialState: {
|
||||
proverbs: [
|
||||
"CopilotKit may be new, but it's the best thing since sliced bread.",
|
||||
],
|
||||
},
|
||||
});
|
||||
|
||||
// Defensive default: during transient state-sync, `state` or
|
||||
// `state.proverbs` can momentarily be undefined. Coalescing here
|
||||
// keeps the map/length checks below from falling into the
|
||||
// `undefined !== 0` trap that would hide the "No proverbs yet"
|
||||
// empty-state fallback.
|
||||
const proverbs = state?.proverbs ?? [];
|
||||
|
||||
// 🪁 Shared State action: writes into the shared agent state above
|
||||
// (not to be confused with a pure frontend action — this mutates
|
||||
// `proverbs`, which is part of the agent's CoAgent state and is
|
||||
// synced back to the graph on the next turn).
|
||||
// https://docs.copilotkit.ai/coagents/shared-state
|
||||
useCopilotAction(
|
||||
{
|
||||
name: "addProverb",
|
||||
description: "Add a proverb to the list.",
|
||||
parameters: [
|
||||
{
|
||||
name: "proverb",
|
||||
type: "string",
|
||||
description: "The proverb to add. Make it witty, short and concise.",
|
||||
required: true,
|
||||
},
|
||||
],
|
||||
handler: ({ proverb }) => {
|
||||
// Defensive guard: during streaming, the LLM may invoke the handler
|
||||
// before the `proverb` arg has fully arrived. Skipping the update
|
||||
// here avoids pushing `undefined` into the proverbs array, which
|
||||
// would break React rendering and React key stability.
|
||||
if (typeof proverb !== "string" || proverb.length === 0) return;
|
||||
setState((prevState) => ({
|
||||
...prevState,
|
||||
proverbs: [...(prevState?.proverbs || []), proverb],
|
||||
}));
|
||||
},
|
||||
},
|
||||
[setState],
|
||||
);
|
||||
|
||||
//🪁 Generative UI: https://docs.copilotkit.ai/coagents/generative-ui
|
||||
//
|
||||
// `available: "disabled"` is the correct pairing with `render:` here.
|
||||
// In @copilotkit/react-core, useCopilotAction routes based on the
|
||||
// `available` value (see
|
||||
// node_modules/@copilotkit/react-core/src/hooks/use-copilot-action.ts
|
||||
// `getActionConfig`):
|
||||
// - "enabled" / "remote" → frontend tool (handler runs client-side)
|
||||
// - "frontend" / "disabled" → render-only (registers a tool-call
|
||||
// renderer; no handler)
|
||||
// We want the BACKEND `getWeather` tool in agent.ts to execute the
|
||||
// handler server-side AND have the streamed tool-call args drive a
|
||||
// client-side gen-UI render here. The render-only path (via
|
||||
// useRenderToolCall) still adds this renderer to
|
||||
// `copilotkit.renderToolCalls` regardless of `available`, so the
|
||||
// WeatherCard fires during tool-call streaming (see
|
||||
// examples/showcases/scene-creator/src/app/page.tsx for the same
|
||||
// pattern). Setting `"enabled"` here would register a FRONTEND handler
|
||||
// of the same name and collide with the backend tool.
|
||||
useCopilotAction(
|
||||
{
|
||||
name: "getWeather",
|
||||
description: "Get the weather for a given location.",
|
||||
available: "disabled",
|
||||
parameters: [{ name: "location", type: "string", required: true }],
|
||||
render: ({ args }) => {
|
||||
return <WeatherCard location={args.location} themeColor={themeColor} />;
|
||||
},
|
||||
},
|
||||
[themeColor],
|
||||
);
|
||||
|
||||
return (
|
||||
<div
|
||||
style={{ backgroundColor: themeColor }}
|
||||
className="h-screen w-screen flex justify-center items-center flex-col transition-colors duration-300"
|
||||
>
|
||||
<div className="bg-white/20 backdrop-blur-md p-8 rounded-2xl shadow-xl max-w-2xl w-full">
|
||||
<h1 className="text-4xl font-bold text-white mb-2 text-center">
|
||||
Proverbs
|
||||
</h1>
|
||||
<p className="text-gray-200 text-center italic mb-6">
|
||||
This is a demonstrative page, but it could be anything you want! 🪁
|
||||
</p>
|
||||
<hr className="border-white/20 my-6" />
|
||||
<div className="flex flex-col gap-3">
|
||||
{proverbs.map((proverb, index) => (
|
||||
// Intentional index-and-content composite key: `${index}-${proverb}`.
|
||||
// Plain `proverb` collides on duplicates (React logs a
|
||||
// duplicate-key warning and collapses to one node); plain
|
||||
// `index` destabilizes rows across agent-side inserts/deletes.
|
||||
// The composite tolerates duplicates for this demo where rows
|
||||
// are append-only and reordering is not a concern. Migrating
|
||||
// to `{id, text}` objects (seeded with crypto.randomUUID())
|
||||
// is the proper fix and is deferred to a follow-up since it
|
||||
// requires widening AgentState.proverbs.
|
||||
<div
|
||||
key={`${index}-${proverb}`}
|
||||
className="bg-white/15 p-4 rounded-xl text-white relative group hover:bg-white/20 transition-all"
|
||||
>
|
||||
<p className="pr-8">{proverb}</p>
|
||||
<button
|
||||
onClick={() =>
|
||||
setState((prev) => ({
|
||||
...(prev ?? {}),
|
||||
// Filter by value identity rather than captured index:
|
||||
// between render and click, the agent may have
|
||||
// inserted/removed proverbs, shifting `index` to point
|
||||
// at a different entry. Matching on the string value
|
||||
// is stable (and consistent with the React key above).
|
||||
proverbs: (prev?.proverbs ?? []).filter(
|
||||
(p) => p !== proverb,
|
||||
),
|
||||
}))
|
||||
}
|
||||
className="absolute right-3 top-3 opacity-0 group-hover:opacity-100 transition-opacity
|
||||
bg-red-500 hover:bg-red-600 text-white rounded-full h-6 w-6 flex items-center justify-center"
|
||||
>
|
||||
✕
|
||||
</button>
|
||||
</div>
|
||||
))}
|
||||
</div>
|
||||
{proverbs.length === 0 && (
|
||||
<p className="text-center text-white/80 italic my-8">
|
||||
No proverbs yet. Ask the assistant to add some!
|
||||
</p>
|
||||
)}
|
||||
</div>
|
||||
</div>
|
||||
);
|
||||
}
|
||||
|
||||
function SunIcon() {
|
||||
return (
|
||||
<svg
|
||||
xmlns="http://www.w3.org/2000/svg"
|
||||
viewBox="0 0 24 24"
|
||||
fill="currentColor"
|
||||
className="w-14 h-14 text-yellow-200"
|
||||
>
|
||||
<circle cx="12" cy="12" r="5" />
|
||||
<path
|
||||
d="M12 1v2M12 21v2M4.22 4.22l1.42 1.42M18.36 18.36l1.42 1.42M1 12h2M21 12h2M4.22 19.78l1.42-1.42M18.36 5.64l1.42-1.42"
|
||||
strokeWidth="2"
|
||||
stroke="currentColor"
|
||||
/>
|
||||
</svg>
|
||||
);
|
||||
}
|
||||
|
||||
// Weather card rendered by the getWeather action. `location` and
|
||||
// `themeColor` are driven by the agent's tool-call args + frontend state.
|
||||
function WeatherCard({
|
||||
location,
|
||||
themeColor,
|
||||
}: {
|
||||
location?: string;
|
||||
themeColor: string;
|
||||
}) {
|
||||
return (
|
||||
<div
|
||||
style={{ backgroundColor: themeColor }}
|
||||
className="rounded-xl shadow-xl mt-6 mb-4 max-w-md w-full"
|
||||
>
|
||||
<div className="bg-white/20 p-4 w-full">
|
||||
<div className="flex items-center justify-between">
|
||||
<div>
|
||||
<h3 className="text-xl font-bold text-white capitalize">
|
||||
{/* During streaming, the tool-call arg may not have arrived
|
||||
yet, leaving `location` undefined and producing a blank
|
||||
heading. Show a loading placeholder in that window. */}
|
||||
{location || "Loading…"}
|
||||
</h3>
|
||||
<p className="text-white">Current Weather</p>
|
||||
</div>
|
||||
<SunIcon />
|
||||
</div>
|
||||
|
||||
<div className="mt-4 flex items-end justify-between">
|
||||
<div className="text-3xl font-bold text-white">70°</div>
|
||||
<div className="text-sm text-white">Clear skies</div>
|
||||
</div>
|
||||
|
||||
<div className="mt-4 pt-4 border-t border-white">
|
||||
<div className="grid grid-cols-3 gap-2 text-center">
|
||||
<div>
|
||||
<p className="text-white text-xs">Humidity</p>
|
||||
<p className="text-white font-medium">45%</p>
|
||||
</div>
|
||||
<div>
|
||||
<p className="text-white text-xs">Wind</p>
|
||||
<p className="text-white font-medium">5 mph</p>
|
||||
</div>
|
||||
<div>
|
||||
<p className="text-white text-xs">Feels Like</p>
|
||||
<p className="text-white font-medium">72°</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
);
|
||||
}
|
||||
@@ -0,0 +1,34 @@
|
||||
{
|
||||
"compilerOptions": {
|
||||
"target": "ES2022",
|
||||
"lib": ["dom", "dom.iterable", "esnext"],
|
||||
"allowJs": true,
|
||||
"skipLibCheck": true,
|
||||
"strict": true,
|
||||
"noEmit": true,
|
||||
"esModuleInterop": true,
|
||||
"module": "esnext",
|
||||
"moduleResolution": "bundler",
|
||||
"resolveJsonModule": true,
|
||||
"isolatedModules": true,
|
||||
"jsx": "react-jsx",
|
||||
"incremental": true,
|
||||
"plugins": [
|
||||
{
|
||||
"name": "next"
|
||||
}
|
||||
],
|
||||
"baseUrl": ".",
|
||||
"paths": {
|
||||
"@/*": ["./src/*"]
|
||||
}
|
||||
},
|
||||
"include": [
|
||||
"next-env.d.ts",
|
||||
"**/*.ts",
|
||||
"**/*.tsx",
|
||||
".next/types/**/*.ts",
|
||||
".next/dev/types/**/*.ts"
|
||||
],
|
||||
"exclude": ["node_modules"]
|
||||
}
|
||||
@@ -0,0 +1,21 @@
|
||||
{
|
||||
"name": "langgraph-js-starter",
|
||||
"version": "0.1.7",
|
||||
"private": true,
|
||||
"workspaces": [
|
||||
"apps/*"
|
||||
],
|
||||
"scripts": {
|
||||
"dev": "turbo run dev",
|
||||
"build": "turbo run build",
|
||||
"lint": "turbo run lint"
|
||||
},
|
||||
"devDependencies": {
|
||||
"@langchain/langgraph-cli": "^1.0.4",
|
||||
"turbo": "^2.3.3"
|
||||
},
|
||||
"engines": {
|
||||
"node": ">=20.0.0"
|
||||
},
|
||||
"packageManager": "pnpm@9.15.0"
|
||||
}
|
||||
@@ -0,0 +1,2 @@
|
||||
packages:
|
||||
- "apps/*"
|
||||
@@ -0,0 +1,19 @@
|
||||
{
|
||||
"$schema": "https://turbo.build/schema.json",
|
||||
"tasks": {
|
||||
"dev": {
|
||||
"cache": false,
|
||||
"persistent": true
|
||||
},
|
||||
"build": {
|
||||
"outputs": [".next/**", "!.next/cache/**", "dist/**"],
|
||||
"dependsOn": ["^build"]
|
||||
},
|
||||
"start": {
|
||||
"cache": false,
|
||||
"persistent": true,
|
||||
"dependsOn": ["^build"]
|
||||
},
|
||||
"lint": {}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user