ai-persistence/build-cloudflare-artifact-store SKILL.md skillA
ai-persistence/build-cloudflare-artifact-store 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-persistence/build-cloudflare-artifact-store@git:20261022.f1b3f65Pins git:20261022.f1b3f65 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-persistence/skills/ai-persistence/build-cloudflare-artifact-store/SKILL.md- Versions recorded
- 7
- Latest version
- git:20261022.f1b3f65, committed Oct 22, 2026
- First version recorded
- Jul 31, 2026
- Size
- 32,155 bytes
- Repository stars
- 3,337
- License
- MIT
Use when a Cloudflare Worker needs durable byte storage for TanStack AI generated media (images, audio, video, transcripts) — writes a BlobStore backed by R2 and an ArtifactStore backed by D1, composes them onto the generation persistence so withGenerationPersistence persists artifact bytes, and serves them back from a Worker GET route. Includes one-line sketches for S3, GCS, Vercel Blob, Supabase, and a dev filesystem BlobStore.
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
# Cloudflare Artifact + Blob Store
`withGenerationPersistence(persistence)` needs only `stores.generationRuns` to track a
generation's lifecycle. Add `stores.artifacts` (metadata) **and** `stores.blobs`
(the bytes) — both, or neither — and the middleware also persists the generated
media: image/audio/TTS/video/transcription bytes land at blob key
`artifacts/<runId>/<artifactId>`, with an `ArtifactRecord` row describing each.
The deliverable is **one file in the Worker** — e.g.
`src/lib/generation-persistence.ts` — exporting a factory that builds an
`AIPersistence` from the request's R2 + D1 bindings, plus a GET route that serves
artifact bytes with `retrieveArtifact` / `retrieveBlob`.
Read the sibling **ai-persistence/build-cloudflare-adapter** skill for the
per-request-binding rule, `wrangler` config shape, D1 migration workflow, and the
chat (generation-run/message) side. This skill covers only the two byte-storage stores and
how to compose them.
## The two contracts
Both come from `@tanstack/ai-persistence`. `defineBlobStore` / `defineArtifactStore`
type an object literal inline (autocomplete + contract checking, no separate
annotation).
```ts
import type {
…Read the whole file at its exact version.
How to install
mdr add tanstack/ai/ai-persistence/build-cloudflare-artifact-store@sha256:dc1997027533c52dThe line at the top of this page pins the label git:20261022.f1b3f65, 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_qelpkbdrkfas2qjy)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 7 versions of this file, between Jul 31, 2026 and Oct 22, 2026, about one every 14 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261022.f1b3f65 latest | 2026-10-22 | f1b3f65 | 32,155 B | A | view · diff |
| git:20261006.30254ad | 2026-10-06 | 30254ad | 32,199 B | A | view · diff |
| git:20260909.53e2ec0 | 2026-09-09 | 53e2ec0 | 31,724 B | A | view · diff |
| git:20260820.9b5f841 | 2026-08-20 | 9b5f841 | 31,546 B | A | view · diff |
| git:20260731.826cfed | 2026-07-31 | 826cfed | 30,661 B | A | view · diff |
| git:20260731.bef85d2 | 2026-07-31 | bef85d2 | 30,673 B | A | view · diff |
| git:20260731.996a980 | 2026-07-31 | 996a980 | 19,349 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 (32155 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_qelpkbdrkfas2qjy GET https://markdownregistry.com/api/v1/resolve?ref=tanstack/ai/ai-persistence/build-cloudflare-artifact-store GET https://markdownregistry.com/api/v1/blob/dc1997027533c52d33b06cac0a1032f7fd9e7338af5ef351fb34bea9580aa81b
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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.