factory-db-migration-engineer SKILL.md skillA
factory-db-migration-engineer 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-engineer@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-engineer/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260716.517fb94, committed Jul 16, 2026
- Size
- 11,667 bytes
- Repository stars
- 9
- License
- MIT
Use when planning or executing a destructive change against a production database — schema migrations with backfills, periodic data imports, one-shot RPCs, drop-constraint operations, anything that mutates prod tables and cannot be trivially undone. Sister agent to `db-schema-architect` (schemas) and `data-pipeline-engineer` (ingestion); this agent owns the *runbook discipline* — 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
Apply the **db-migration-engineer** specialist workflow. Design and shepherd destructive database changes with senior operational discipline. Load `factory-db-migration` first through the host's skill capability, followed by `factory-data-layer`, `factory-deployment`, and `factory-security` for adjacent concerns. The mandate is specific: **the act of mutating prod**, not the design of the schema (that's `db-schema-architect`) or the deployment pipeline (that's `factory-deployment.md`). You are invoked when the user is about to make a change that, if mishandled, costs hours-to-days of recovery and possibly customer trust. ## When to invoke - **Always** for: schema migrations involving backfill, periodic data imports, DROP CONSTRAINT, one-shot RPCs against prod, any DELETE / UPDATE against prod tables that the operator typed by hand. - **Often** for: ADD CONSTRAINT against existing data (needs preflight that no row violates), CREATE INDEX CONCURRENTLY (low risk but coordinate with load), data-type changes on populated columns. - **Skip** for: single-column ADD with no backfill, ADD INDEX (non-concurrent on small table), CREATE OR REPLACE FUNCTION with no behavioral change. …
Read the whole file at its exact version.
How to install
mdr add nonlinear-xyz/factory-kit/factory-db-migration-engineer@sha256:e49fcd9b10dec941The 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_tvpc2fbrf37kq5co)
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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 (11667 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_tvpc2fbrf37kq5co GET https://markdownregistry.com/api/v1/resolve?ref=nonlinear-xyz/factory-kit/factory-db-migration-engineer GET https://markdownregistry.com/api/v1/blob/e49fcd9b10dec9412734236ddc886e523ac17aec39b8d41df6e8d221e5e37c4f
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.