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).
How to install locks?
tanstack/ai/locks
$npx -y skills add tanstack/ai --skill locksInstalls into the current project.
›Prefer a prompt? Paste this to your agent
Run `npx skills use "https://github.com/tanstack/ai" --skill "tanstack/ai/locks"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/tanstack/ai" that are relevant to the current task. Run `npx skills add "https://github.com/tanstack/ai"` and select the relevant skills, then follow their instructions.
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