factory-db-migration SKILL.md skillA
factory-db-migration from nonlinear-xyz/factory-kit is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add nonlinear-xyz/factory-kit/factory-db-migration@git:20260716.517fb94Pins git:20260716.517fb94 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- nonlinear-xyz/factory-kit
- Path
skills/factory-db-migration/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260716.517fb94, committed Jul 16, 2026
- Size
- 23,727 bytes
- Repository stars
- 9
- License
- MIT
The operational discipline for running a destructive change against a production database — schema migrations, data backfills, one-shot RPCs, historical seed imports. Adjacent to `factory-data-layer.md` (schema design) and `factory-deployment.md` (where migrations execute in CI) — this skill is about the runbook around the act of mutating prod. Covers the three-stage write contract (preflight → mutate → verify → rollback), idempotency by natural key, layered backup independence…
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
# Factory DB migration This skill is the runbook discipline for making a destructive database change. It is invoked **before** the first time a migration, backfill, or seed touches prod — and re-invoked on every periodic re-import. The factory ships `factory-data-layer.md` for *how schemas are designed* and `factory-deployment.md` for *where migrations execute in CI*. This skill is the third leg: **how to run the change safely once both upstream pieces are in place.** Read all three before proposing a non-trivial prod write. ## How to use this skill - **Before any first-of-its-kind destructive prod write** — read the Principle of each section. If you can't articulate the principle in your own words, you don't yet understand the change well enough to ship it. - **During design review** — use the section list as a checklist: do we have preflight? Idempotency proof? Rollback? Pre-write snapshot? Human gates? - **During incident response** — `factory-pitfalls.md` indexes the failure modes here; jump to the one that matches. ## The data is ground truth — the schema accommodates it …
Read the whole file at its exact version.
How to install
mdr add nonlinear-xyz/factory-kit/factory-db-migration@sha256:c5501bc1b617549eThe line at the top of this page pins the label git:20260716.517fb94, 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_s6m4mlylgm76qzdc)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 16, 2026.
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 (23727 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
nonlinear-xyz/factory-kit · 9 stars · license MIT · pushed 2026-10-29 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_s6m4mlylgm76qzdc GET https://markdownregistry.com/api/v1/resolve?ref=nonlinear-xyz/factory-kit/factory-db-migration GET https://markdownregistry.com/api/v1/blob/c5501bc1b617549e925e4a13a9fa5310ca2b8b322637aba725cc26370deb2e44
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.