planetscale SKILL.md skillA
planetscale from ericrisco/rsc-harness is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ericrisco/rsc-harness/planetscale@git:20260729.ad893daPins git:20260729.ad893da in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ericrisco/rsc-harness
- Path
skills/planetscale/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260729.ad893da, committed Jul 29, 2026
- First version recorded
- Jun 2, 2026
- Size
- 11,302 bytes
- Repository stars
- 236
- License
- MIT
Use when operating PlanetScale (Vitess serverless MySQL) — branches and the `pscale` CLI, schema changes through deploy requests (Online DDL cutover, ~30-min revert window), tables without foreign keys, or the edge HTTP driver. NOT MySQL engine work like EXPLAIN or index choice (that is `mysql`), NOT generic migration theory (that is `db-migrations`).
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
# PlanetScale — Vitess serverless MySQL: branches, deploy requests, no FKs PlanetScale is serverless, MySQL-compatible database-as-a-service built on **Vitess** — the same horizontal-scaling layer that runs YouTube. You do not `ALTER TABLE` against production. Schema changes live on an isolated **branch** (a full copy of the schema), reach production through a **deploy request** (a pull request for your schema), and apply via **Online DDL**: Vitess builds a shadow table holding the new schema, replicates rows and in-flight writes old→new with VReplication, then **cuts over** with no table lock. Because Online DDL and sharding are the platform's center of gravity, you **design without foreign keys** (FKs are now an opt-in but unsharded-only feature). This skill owns that workflow — not MySQL the engine. Heuristic for the boundary: **would this answer be identical on RDS MySQL? Then it is not this skill.** | When the question is really about | Route to | | --- | --- | | A slow query, an `EXPLAIN` plan, an index decision, JSON columns, locking | `../mysql/SKILL.md` for MySQL-engine work; `../postgresdb/SKILL.md` when you want the transferable engine reasoning | …
Read the whole file at its exact version.
How to install
mdr add ericrisco/rsc-harness/planetscale@sha256:0dee9da5b744c5abThe line at the top of this page pins the label git:20260729.ad893da, 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_ejfp3aatx2siy5ll)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jun 2, 2026 and Jul 29, 2026, about one every 57 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260729.ad893da latest | 2026-07-29 | ad893da | 11,302 B | A | view · diff |
| git:20260602.a962997 | 2026-06-02 | a962997 | 13,330 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 (11302 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
ericrisco/rsc-harness · 236 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ejfp3aatx2siy5ll GET https://markdownregistry.com/api/v1/resolve?ref=ericrisco/rsc-harness/planetscale GET https://markdownregistry.com/api/v1/blob/0dee9da5b744c5abd822eea3773e8bb878f4bbd387de31e5b2d595bbbbf44a5b
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.