db-migrations SKILL.md skillA
db-migrations 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/db-migrations@git:20260729.a707f94Pins git:20260729.a707f94 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/db-migrations/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260729.a707f94, committed Jul 29, 2026
- First version recorded
- Jun 2, 2026
- Size
- 13,231 bytes
- Repository stars
- 236
- License
- MIT
Use when a schema change must ship without downtime — NOT NULL, rename, type change, or backfilling millions of live rows — for the expand-contract sequence and the lock/batching discipline that keeps each step from freezing prod. NOT lock internals or EXPLAIN (that is `postgresdb`), NOT drizzle-kit mechanics (that is `drizzle-orm`), NOT PITR (that is `backups`).
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
# Database migrations without downtime A production migration is a **sequence**, not a statement. The moment you treat `ALTER TABLE ... NOT NULL` as one atomic change, you have already lost: the lock blocks every writer, the deploy that depends on the new column races the deploy that still reads the old one, and a rollback means a second outage. Your job is to decompose one risky change into a chain of small steps where **every intermediate state is independently deployable** — the old app keeps working, the new app keeps working, and you can stop at any point without an outage. This skill is engine-neutral. It owns the *choreography* — what order to run things in and how to keep each DDL from freezing the table — across Postgres, MySQL, and serverless variants, whatever runner you use (Flyway, Alembic, golang-migrate, drizzle-kit, raw SQL). ## Route elsewhere - Postgres lock internals, EXPLAIN/ANALYZE, indexing strategy, RLS, PgBouncer → `../postgresdb/SKILL.md`. - Writing schema and running drizzle-kit specifically → `../drizzle-orm/SKILL.md`. - PlanetScale deploy-request / branch cutover (Vitess online DDL) → `../planetscale/SKILL.md`. …
Read the whole file at its exact version.
How to install
mdr add ericrisco/rsc-harness/db-migrations@sha256:40ab0bfe53f13bceThe line at the top of this page pins the label git:20260729.a707f94, 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_qxv2wfht4wsp2vst)
1 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.a707f94 latest | 2026-07-29 | a707f94 | 13,231 B | A | view · diff |
| git:20260602.a440d62 | 2026-06-02 | a440d62 | 14,744 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 (13231 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_qxv2wfht4wsp2vst GET https://markdownregistry.com/api/v1/resolve?ref=ericrisco/rsc-harness/db-migrations GET https://markdownregistry.com/api/v1/blob/40ab0bfe53f13bce2280f011c3d2ce10397d4d1507c170d58e975ab2a03ce8f5
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.