data-client-v0.18-migration SKILL.md skillB
data-client-v0.18-migration from reactive/data-client is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add reactive/data-client/data-client-v0.18-migration@git:20261019.7d1c42aPins git:20261019.7d1c42a in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- reactive/data-client
- Path
.agents/skills/data-client-v0.18-migration/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261019.7d1c42a, committed Oct 19, 2026
- First version recorded
- Aug 19, 2026
- Size
- 7,801 bytes
- Repository stars
- 2,040
- License
- Apache-2.0
Migrate @data-client codebases to v0.18 delegate signatures. Drives the v0.18 codemod and then handles the cases it cannot — especially registering argsKey for schemas whose output depends on endpoint args. Use when upgrading to v0.18, seeing TS errors about unvisit/visit/args/delegate signatures, or adapting custom Schema implementations.
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
# @data-client v0.18 Migration
Applies to anyone implementing a custom [`Schema`](https://dataclient.io/rest/api/SchemaSimple) — `SchemaSimple`, `SchemaClass`, polymorphic wrappers, or types that subclass `EntityMixin` directly. Built-in schemas (`Entity`, `resource()`, `Collection`, `Union`, `Values`, `Array`, `Object`, `Query`, `Invalidate`, `Lazy`) are migrated by the library.
## What changed
`Schema.denormalize` and `Schema.normalize` now take a single `delegate` instead of `(args, unvisit)` / `(args, visit, delegate)`:
```ts
denormalize(input, delegate) { return delegate.unvisit(this.schema, input); }
normalize(input, parent, key, delegate /*, parentEntity? */) {
return delegate.visit(this.schema, input, parent, key);
}
```
Critical semantic change: reading `delegate.args` does **not** contribute to cache invalidation. Schemas whose *output* varies with endpoint args must register that dependency through [`delegate.argsKey(fn)`](https://dataclient.io/rest/api/SchemaSimple). See [Step 2](#step-2-register-argskey-for-args-dependent-schemas-not-automatable) below.
## Step 1: run the codemod
…Read the whole file at its exact version.
How to install
mdr add reactive/data-client/data-client-v0.18-migration@sha256:e40bc3286028fd78The line at the top of this page pins the label git:20261019.7d1c42a, 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_zlq6oiyoqzjqernf)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Aug 19, 2026 and Oct 19, 2026, about one every 61 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261019.7d1c42a latest | 2026-10-19 | 7d1c42a | 7,801 B | B | view · diff |
| git:20260819.be7ae1a | 2026-08-19 | be7ae1a | 7,783 B | B | view |
Audit of the latest version
- fail: No script tag (matched: <script)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (7801 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
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
reactive/data-client · 2,040 stars · license Apache-2.0 · pushed 2026-11-01 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_zlq6oiyoqzjqernf GET https://markdownregistry.com/api/v1/resolve?ref=reactive/data-client/data-client-v0.18-migration GET https://markdownregistry.com/api/v1/blob/e40bc3286028fd78812e3e898346be429e5e3e264c0abcd24ffb107c1f544c65
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.