tanstack/ai · packages/ai-persistence/skills/ai-persistence/build-custom-adapter/SKILL.md

ai-persistence/build-custom-adapter skillA

ai-persistence/build-custom-adapter is agent-read markdown (skill) from tanstack/ai: Use when an app needs TanStack AI chat persistence on a database with no dedicated recipe — raw Postgres (pg/postgres.js), Kysely, node:sqlite, MongoDB, Supabase, Redis. Writes a chat-persistence.ts against the app's existing client, covering the four stores, the idempotency invariants, and the conformance gate. Route to the Drizzle, Prisma, or Cloudflare skills instead when one of those matches..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add tanstack/ai/ai-persistence/build-custom-adapter@git:20260909.53e2ec0
Exact content
mdr add tanstack/ai/ai-persistence/build-custom-adapter@sha256:8538b25ac858f465

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_izatd4xb437olgi4.svg)](https://markdownregistry.com/a/art_izatd4xb437olgi4)

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Versions

versioncommittedcommitsizeaudit
git:20260909.53e2ec0 latest2026-09-09 53e2ec0 16,457 BA view · diff
git:20260804.d9d1e1f2026-08-04 d9d1e1f 16,471 BA view · diff
git:20260731.996a9802026-07-31 996a980 12,627 BA view · diff
git:20260727.4ab149f2026-07-27 4ab149f 12,516 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (16457 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

GitHub

tanstack/ai · 3,097 stars · license MIT · pushed 2026-09-11 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_izatd4xb437olgi4
GET https://markdownregistry.com/api/v1/resolve?ref=tanstack/ai/ai-persistence/build-custom-adapter
GET https://markdownregistry.com/api/v1/blob/8538b25ac858f465896ee0d1a7e27833b94f57e57498d00a131e1c069d188561