Files
copilotkit__copilotkit/examples/integrations/langgraph-js/package.json
Mike Ryan d5b804698d fix(examples): suppress browser-extension hydration warning on <body> across integration demos (#5568)
## What

1. Add `suppressHydrationWarning` to `<body>` across **all 14
integration demo templates**
(`examples/integrations/*/src/app/layout.tsx`).
2. Fix a pre-existing **double-escaped Windows path** bug in the parity
manifest's `packageJsonOverrides`.

## Why (hydration)

**Mike Ryan hit a hydration error on first load of a fresh
`langgraph-python` init — caused by his Grammarly browser extension.**

Grammarly (and similar extensions) inject attributes onto `<body>`
*before* React hydrates:

```
data-new-gr-c-s-check-loaded="9.98.0"
data-gr-ext-installed=""
```

Those attributes are in the client DOM but absent from the server HTML,
so Next.js reports:

> A tree hydrated but some attributes of the server rendered HTML didn't
match the client properties.

It's a **false positive** — the app works, and end users (without dev
extensions) never see it — but it's a red console error on the first
load of our flagship eval/showcase templates, which is a poor first
impression.

## Fix (hydration)

`suppressHydrationWarning` on `<body>` is the React/Next.js-recommended
escape hatch for this. It is **scoped and one level deep**: it only
relaxes the check for `<body>`'s *own* attributes/text — **everything
rendered inside `<body>` (the whole app) is still fully
hydration-checked** — and `<body>`'s only attribute here is a static
`className`, so none of our own markup is masked. An inline comment
documents this so a future maintainer who adds dynamic `<body>`
attributes knows the check is relaxed.

`agent-spec` already had `suppressHydrationWarning` on `<html>`; the
Grammarly attributes land on `<body>`, so it needed the body-level
relaxation too (the `<html>` one is a level up and doesn't cover
`<body>`'s attributes).

## Commits

1. `b1fa482a7` — north-star (`langgraph-python`) + parity instances
(`langgraph-js`, `langgraph-fastapi`, `strands-python`) via `pnpm
parity:sync`.
2. `9f9c415d9` — the non-parity templates (not tracked by
`_parity/manifest.json`): `adk`, `agno`, `crewai-crews`, `crewai-flows`,
`llamaindex`, `mastra`, `ms-agent-framework-dotnet`,
`ms-agent-framework-python`, `pydantic-ai`, `agent-spec`. *(The repo's
`oxfmt` pre-commit hook also collapsed some multiline `<CopilotKit …>`
JSX in these files — standard auto-format on touched files; the only
semantic change is the suppression.)*
3. `7d60e49de` — parity manifest path-escaping fix (see below).

## The manifest bug (commit 3)

While syncing I found the `langgraph-js` and `strands-python`
`packageJsonOverrides` double-escaped the Windows `.bat` fallback,
producing `scripts\\run-agent.bat` (two backslashes) instead of
`scripts\run-agent.bat`:

- `langgraph-js/package.json` had already been synced with the broken
value.
- `strands-python/package.json` was still correct — and `parity:sync`
would have **corrupted** it on the next run (which is what surfaced
this).

Fixed the three overrides and re-ran `parity:sync`, which corrects
`langgraph-js/package.json` and leaves `strands-python`'s correct value
intact.

## Test plan

- [x] `pnpm parity:verify` → 0 errors
- [x] lefthook pre-commit green on all 3 commits (lint + `packages/**`
tests + commitlint)
- [x] All 14 templates confirmed to have body-level
`suppressHydrationWarning`
- [ ] Reviewer with Grammarly installed: run/`init` a template and
confirm no hydration error on first load
2026-06-18 20:02:31 -07:00

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1.5 KiB
JSON

{
"name": "langgraph-js-starter",
"version": "0.1.0",
"private": true,
"scripts": {
"dev": "concurrently \"npm run dev:ui\" \"npm run dev:agent\" --names ui,agent --prefix-colors blue,green --kill-others",
"dev:debug": "LOG_LEVEL=debug npm run dev",
"dev:ui": "next dev --turbopack",
"dev:agent": "./scripts/run-agent.sh || scripts\\run-agent.bat",
"build": "next build",
"start": "next start",
"lint": "next lint",
"install:agent": "cd agent && npm install",
"postinstall": "npm run install:agent"
},
"dependencies": {
"@copilotkit/a2ui-renderer": "1.61.0",
"@copilotkit/react-core": "1.61.0",
"@copilotkit/runtime": "1.61.0",
"@radix-ui/react-checkbox": "^1.3.3",
"@radix-ui/react-label": "^2.1.8",
"@radix-ui/react-separator": "^1.1.8",
"class-variance-authority": "^0.7.1",
"clsx": "^2.1.1",
"hono": "^4.12.10",
"lucide-react": "^0.577.0",
"next": "16.1.6",
"react": "^19.2.4",
"react-dom": "^19.2.4",
"react-rnd": "^10.5.2",
"react18-json-view": "^0.2.9",
"recharts": "^3.7.0",
"shiki": "^3.22.0",
"tailwind-merge": "^3.5.0",
"zod": "^3.23.8"
},
"devDependencies": {
"@tailwindcss/postcss": "^4",
"@types/node": "^20",
"@types/react": "^19",
"@types/react-dom": "^19",
"concurrently": "^9.1.2",
"tailwindcss": "^4",
"typescript": "^5"
},
"overrides": {
"@langchain/core": "1.1.44",
"@langchain/langgraph": "1.3.0"
},
"engines": {
"node": ">=18.0.0"
}
}