data-migration SKILL.md skillA
data-migration from cbrock84/headcount is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add cbrock84/headcount/data-migration@git:20260901.d41b3aePins git:20260901.d41b3ae in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- cbrock84/headcount
- Path
plugins/technology/skills/data-migration/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260901.d41b3ae, committed Sep 1, 2026
- Size
- 4,640 bytes
- Repository stars
- 2,543
- License
- MIT
Moves data from one system to another without losing it or corrupting it — profiling the source before mapping, deciding between big-bang and parallel-run cutover, reconciling counts and values rather than assuming, handling the records that will not map cleanly, and planning a rollback that is actually executable. Use this to plan or run a migration, assess a migration plan someone else wrote, work out why a completed migration is producing wrong numbers, or size how long one will really take.
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 migration Migrations are estimated as a data-movement problem and turn out to be a data-quality problem. The transfer is the easy part; discovering what the old system actually contains is where the time goes. ## Profile the source before you map anything Look at the real data, not the schema and not what anyone tells you it contains. Every legacy system has fields used for something other than their name, free-text where an enumeration was intended, duplicates that both look canonical, and records predating a rule everyone believes has always applied. Count distinct values, null rates, format variance, and outliers on every field you intend to move. This is the single highest-return activity in a migration and the one most often skipped in favor of starting the mapping. **Decide what not to move.** Migrating everything is the default and rarely the right answer. Archive what has no live use and move a clean subset — it shrinks the mapping, the reconciliation, and the cutover window all at once. ## Write the mapping down field by field, including the ugly parts For each target field: source field, transformation, what happens when the source is empty, and …
Read the whole file at its exact version.
How to install
mdr add cbrock84/headcount/data-migration@sha256:e4b930bf20590995The line at the top of this page pins the label git:20260901.d41b3ae, 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_mi47v6rsll2pi3xh)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 1, 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 (4640 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
cbrock84/headcount · 2,543 stars · license MIT · pushed 2026-10-18 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_mi47v6rsll2pi3xh GET https://markdownregistry.com/api/v1/resolve?ref=cbrock84/headcount/data-migration GET https://markdownregistry.com/api/v1/blob/e4b930bf205909954d86e6af600ea00436ce225369a7fd808d0077042c1836dd
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.
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