ai-core/locks SKILL.md skillA
ai-core/locks 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/locks@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/locks/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261022.fe83aa0, committed Oct 22, 2026
- First version recorded
- Jul 27, 2026
- Size
- 5,591 bytes
- Repository stars
- 3,337
- License
- MIT
LockStore, InMemoryLockStore, LocksCapability and withLocks for multi-instance coordination in TanStack AI. Ships in @tanstack/ai — NOT in @tanstack/ai-persistence. Separate from AIPersistence state stores — not a stores key, not composable. InMemoryLockStore vs a distributed (e.g. Cloudflare Durable Object) lock, lease recovery, AbortSignal in critical sections. Use when sandbox or other middleware needs cross-worker mutual exclusion — NOT for storing messages/runs (use withPersistence).
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
# Locks (coordination — not persistence)
> **Dependency note:** This skill builds on ai-core and ai-core/middleware.
> `withLocks` is a ChatMiddleware that provides a capability. Locks are **not**
> part of `AIPersistence.stores` and are **not** composed with
> `composePersistence` — they ship in `@tanstack/ai`, independent of
> `@tanstack/ai-persistence`.
## Why separate?
State stores answer "what is durable chat data?"
Locks answer "who may run this critical section right now?"
`withPersistence` does **not** automatically lock a whole turn. Take a
per-thread (or other) lock yourself when multi-writer races matter.
## Wire locks
```ts
import { chat } from '@tanstack/ai'
import { withLocks, InMemoryLockStore } from '@tanstack/ai/locks'
import { openaiText } from '@tanstack/ai-openai'
const messages = [{ role: 'user' as const, content: 'Hello' }]
chat({
adapter: openaiText('gpt-6.1-sol'),
messages,
threadId: 'thread-1',
middleware: [
withLocks(new InMemoryLockStore()), // single process
],
})
```
Alongside persistence — optional, locks do not require it:
```ts
import { chat } from '@tanstack/ai'
…Read the whole file at its exact version.
How to install
mdr add tanstack/ai/ai-core/locks@sha256:244042d4b04d0fd1The 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_6ofvjtxctuqsmfhn)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Jul 27, 2026 and Oct 22, 2026, about one every 22 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261022.fe83aa0 latest | 2026-10-22 | fe83aa0 | 5,591 B | A | view · diff |
| git:20261022.f1b3f65 | 2026-10-22 | f1b3f65 | 5,579 B | A | view · diff |
| git:20260909.53e2ec0 | 2026-09-09 | 53e2ec0 | 5,507 B | A | view · diff |
| git:20260804.d9d1e1f | 2026-08-04 | d9d1e1f | 4,807 B | A | view · diff |
| git:20260727.4ab149f | 2026-07-27 | 4ab149f | 4,807 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 (5591 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_6ofvjtxctuqsmfhn GET https://markdownregistry.com/api/v1/resolve?ref=tanstack/ai/ai-core/locks GET https://markdownregistry.com/api/v1/blob/244042d4b04d0fd1b96f25fde3fad8c38e087c01967a5638f46d1107c3ba3b28
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.