docs: align Angular 22 support copy

Author: blove

README.md

@@ -35,7 +35,7 @@
 
 Threadplane is a production-ready agent UI framework for Angular. `@threadplane/chat` provides chat surfaces (headless primitives, opinionated compositions, interrupts, generative UI). `@threadplane/langgraph` adapts a LangGraph Platform endpoint into Angular Signals via `provideAgent()` + `injectAgent()`. `@threadplane/ag-ui` bridges any AG-UI-compatible backend into the same chat surface. `@threadplane/render` renders JSON specs to Angular components inside your design system.
 
-`injectAgent()` is the Angular equivalent of LangGraph's React `useStream()` hook, projected through a runtime-neutral `Agent` contract that `@threadplane/chat` consumes. Configure it once with `provideAgent({...})`, inject it into any Angular 20+ component, and get signal-driven access to messages, status, tool calls, interrupts, subagents, history, and thread management — no subscriptions, no `async` pipe, no zone.js required.
+`injectAgent()` is the Angular equivalent of LangGraph's React `useStream()` hook, projected through a runtime-neutral `Agent` contract that `@threadplane/chat` consumes. Configure it once with `provideAgent({...})`, inject it into any Angular 20–22 component, and get signal-driven access to messages, status, tool calls, interrupts, subagents, history, and thread management — no subscriptions, no `async` pipe, no zone.js required.
 
 ---
 
@@ -116,7 +116,7 @@ export class SupportChatComponent {
 | Reload last submission | `reload()` | — |
 | Custom transport (for testing) | `MockAgentTransport` | mock fetch |
 | Angular `ResourceRef<T>` compatibility | Full duck-type parity | N/A |
-| Angular 20+ Signals API | Native | N/A |
+| Angular 20–22 Signals API | Native | N/A |
 | SSR / Server Components | Client-side only | React Server Components (React) |
 
 ---

apps/website/content/AGENTS.md.template

@@ -2,6 +2,8 @@
 
 Production-ready chat, thread/history/branch UI, interrupts, subagents, planning, memory, and generative UI for Angular agent apps.
 
+Supported Angular majors: 20, 21, and 22.
+
 ## License and deployment boundary
 - Every Threadplane package is MIT-licensed and free for commercial and noncommercial use.
 - Threadplane runs inside the customer's Angular application. Agent runtime, models, storage, checkpointing, retention, authorization, and hosting remain customer-operated.

apps/website/content/CLAUDE.md.template

@@ -2,6 +2,8 @@
 
 Production-ready chat, thread/history/branch UI, interrupts, subagents, planning, memory, and generative UI for Angular agent apps.
 
+Supported Angular majors: 20, 21, and 22.
+
 ## License and deployment boundary
 - Every Threadplane package is MIT-licensed and free for commercial and noncommercial use.
 - Threadplane runs inside the customer's Angular application. Agent runtime, models, storage, checkpointing, retention, authorization, and hosting remain customer-operated.

apps/website/content/blog/2026-05-21-build-fullstack-agentic-angular-apps-using-ag-ui.mdx

@@ -15,7 +15,7 @@ AG-UI's event model maps onto Angular signals cleanly, which is what this post b
 
 ## Goals
 
-- Wire an AG-UI-compatible backend to an Angular 20+ app using `@threadplane/ag-ui` and `@threadplane/chat`.
+- Wire an AG-UI-compatible backend to an Angular 20–22 app using `@threadplane/ag-ui` and `@threadplane/chat`.
 - See how 17 protocol events become a handful of signals you read from a template.
 - Handle the parts that turn a demo into a product: tool calls, interrupts, threads, fallbacks.
 
@@ -78,7 +78,7 @@ The two are decoupled on purpose. We will get to why.
 
 ## Let's wire it up
 
-Start with a fresh Angular 20+ app, or use an existing one — `ng new` if you need to spin one up.
+Start with a fresh Angular 20–22 app, or use an existing one — `ng new` if you need to spin one up.
 
 ### Install the packages
 

apps/website/content/blog/2026-08-09-build-an-aws-strands-agent-ui-in-angular-with-ag-ui.mdx

@@ -207,7 +207,7 @@ Now we can give the agent a UI.
 
 ## How do we connect the Angular agent UI?
 
-The Threadplane adapter supports Angular 20 and 21; use Node.js 22 or later for the documented setup.
+The Threadplane adapter supports Angular 20, 21, and 22. Use a Node.js version supported by your Angular major; Angular 22 requires Node.js ^22.22.3, ^24.15.0, or ^26.0.0. See the [Angular compatibility matrix](https://angular.dev/reference/versions).
 Install the chat surface, AG-UI adapter, official AG-UI client packages, and markdown renderer:
 
 <Callout type="info" title="MIT-licensed packages">

apps/website/content/docs/ag-ui/getting-started/installation.mdx

@@ -6,7 +6,7 @@ Use a Node.js version supported by the selected Angular major. Angular 22 suppor
 
 ## Prerequisites
 
-- Angular 20 or later
+- Angular 20, 21, or 22
 - An AG-UI-compatible backend running locally or remotely (CrewAI, Mastra, Microsoft Agent Framework, AG2, Pydantic AI, AWS Strands, or your own subclass of `AbstractAgent`)
 
 ## Install packages

apps/website/content/docs/ag-ui/getting-started/quickstart.mdx

@@ -3,7 +3,7 @@
 Let's bind `<chat>` from `@threadplane/chat` to an AG-UI backend in 5 minutes.
 
 <Callout type="info" title="Prerequisites">
-Angular 20+ project with Node.js 22+. If you need setup help, see the [Installation](/docs/ag-ui/getting-started/installation) guide.
+Angular 20–22 project using a Node.js version supported by that Angular major. If you need setup help, see the [Installation](/docs/ag-ui/getting-started/installation) guide.
 </Callout>
 
 <Callout type="tip" title="Try it first">

apps/website/content/docs/chat/getting-started/installation.mdx

@@ -9,8 +9,8 @@ or runtime key.
 Supported Angular majors: 20, 21, and 22.
 
 <Steps>
-<Step title="Angular 20 or later">
-`@threadplane/chat` uses Angular Signals, `input()`, and `contentChildren()`. Run `ng version` to confirm. Upgrade with `ng update @angular/core @angular/cli` if you're below 20.
+<Step title="Angular 20–22">
+`@threadplane/chat` uses Angular Signals, `input()`, and `contentChildren()`. Run `ng version` to confirm that your project uses Angular 20, 21, or 22.
 </Step>
 <Step title="Node.js compatibility">
 Use a Node.js version supported by the selected Angular major. Angular 22 supports Node.js ^22.22.3, ^24.15.0, or ^26.0.0. See the [Angular compatibility matrix](https://angular.dev/reference/versions).

apps/website/content/docs/chat/getting-started/introduction.mdx

@@ -1,6 +1,6 @@
 # Introduction
 
-`@threadplane/chat` is the Angular UI component library for building chat interfaces on top of a runtime-neutral `Agent` contract. It's a set of composable, Signal-driven components that render messages, handle user input, display tool calls, manage interrupts, and support generative UI -- all styled with CSS custom properties and built for Angular 20+.
+`@threadplane/chat` is the Angular UI component library for building chat interfaces on top of a runtime-neutral `Agent` contract. It's a set of composable, Signal-driven components that render messages, handle user input, display tool calls, manage interrupts, and support generative UI -- all styled with CSS custom properties and built for Angular 20–22.
 
 <Callout type="info" title="What you'll learn">
 This guide explains the library's two-tier architecture, how it relates to the rest of the Threadplane stack, and when to reach for the all-in-one composition versus assembling primitives yourself.

apps/website/content/docs/chat/getting-started/quickstart.mdx

@@ -3,7 +3,7 @@
 Let's build a streaming chat UI with `@threadplane/chat` in 5 minutes.
 
 <Callout type="info" title="Prerequisites">
-Angular 20+ project with an agent provider configured. See [Agent Installation](/docs/langgraph/getting-started/installation) if you need help.
+Angular 20–22 project with an agent provider configured. See [Agent Installation](/docs/langgraph/getting-started/installation) if you need help.
 </Callout>
 
 <Callout type="info" title="No backend yet?">