ai-core/ag-ui-protocol SKILL.md skillA
ai-core/ag-ui-protocol from tanstack/ai is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add tanstack/ai/ai-core/ag-ui-protocol@git:20261022.fe83aa0Pins git:20261022.fe83aa0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- tanstack/ai
- Path
packages/ai/skills/ai-core/ag-ui-protocol/SKILL.md- Versions recorded
- 6
- Latest version
- git:20261022.fe83aa0, committed Oct 22, 2026
- First version recorded
- May 26, 2026
- Size
- 15,360 bytes
- Repository stars
- 3,337
- License
- MIT
Server-side AG-UI streaming protocol implementation: StreamChunk event types (RUN_STARTED, TEXT_MESSAGE_START/CONTENT/END, TOOL_CALL_START/ARGS/END, RUN_FINISHED, RUN_ERROR, REASONING_*, STATE_SNAPSHOT/DELTA, CUSTOM), toServerSentEventsStream() for SSE format, toHttpStream() for NDJSON format. For backends serving AG-UI events without client packages.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# AG-UI Protocol
This skill builds on ai-core. Read it first for critical rules.
## Setup — Server Endpoint Producing AG-UI Events via SSE
```typescript
import { chat, toServerSentEventsResponse } from '@tanstack/ai'
import { openaiText } from '@tanstack/ai-openai'
export async function POST(request: Request) {
const { messages, threadId } = await request.json()
const stream = chat({
adapter: openaiText('gpt-6.1-sol'),
messages,
threadId,
})
return toServerSentEventsResponse(stream)
}
```
`chat()` returns an `AsyncIterable<StreamChunk>`. Each `StreamChunk` is a
typed AG-UI event (discriminated union on `type`). The `toServerSentEventsResponse()`
helper encodes that iterable into an SSE-formatted `Response` with correct headers.
## Setup — Receiving AG-UI RunAgentInput on the Server
```typescript
import {
chat,
chatParamsFromRequestBody,
mergeAgentTools,
toServerSentEventsResponse,
} from '@tanstack/ai'
import { openaiText } from '@tanstack/ai-openai'
import { serverTools } from './tools'
export async function POST(req: Request) {
let params
try {
params = await chatParamsFromRequestBody(await req.json())
} catch (error) {
…Read the whole file at its exact version.
How to install
mdr add tanstack/ai/ai-core/ag-ui-protocol@sha256:d361a8dc7eeb5fe1The line at the top of this page pins the label git:20261022.fe83aa0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_lq6dtmtykbbj3k5p)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 6 versions of this file, between May 26, 2026 and Oct 22, 2026, about one every 30 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261022.fe83aa0 latest | 2026-10-22 | fe83aa0 | 15,360 B | A | view · diff |
| git:20261022.f1b3f65 | 2026-10-22 | f1b3f65 | 15,340 B | A | view · diff |
| git:20260909.53e2ec0 | 2026-09-09 | 53e2ec0 | 15,035 B | A | view · diff |
| git:20260804.d9d1e1f | 2026-08-04 | d9d1e1f | 14,794 B | A | view · diff |
| git:20260706.405c9d4 | 2026-07-06 | 405c9d4 | 14,794 B | A | view · diff |
| git:20260526.2c0ebb3 | 2026-05-26 | 2c0ebb3 | 11,867 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (15360 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
tanstack/ai · 3,337 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_lq6dtmtykbbj3k5p GET https://markdownregistry.com/api/v1/resolve?ref=tanstack/ai/ai-core/ag-ui-protocol GET https://markdownregistry.com/api/v1/blob/d361a8dc7eeb5fe1d710a76b216737327b6c44107cfc15010b087e44f784fcf0
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.