data-migration skillA
data-migration is agent-read markdown (skill) from fmind/dot: Migrate persisted schemas, formats, and archives while preserving data and recovery options..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# Data Migration Change persisted data while preserving its declared meaning and recovery path. [django](../python-web/references/django/GUIDE.md) owns Django migration mechanics; [production-readiness](../production-readiness/SKILL.md) owns the launch decision, and [duckdb](../duckdb/SKILL.md) owns ad-hoc analysis. ## Workflow 1. **Inventory the boundary**: identify source and target versions, authoritative data versus rebuildable caches, all readers and writers, active locks, scale, and compatibility requirements. Inspect actual stored versions rather than inferring them from current code. 1. **Define invariants**: specify identity, counts, relationships, ordering, encoding, null semantics, and fields intentionally changed or discarded. Reject unsupported versions and malformed input with a recoverable error; do not silently reinterpret them. 1. **Choose the transition**: use the project's migration engine for databases. For mixed deployed readers, expand compatibility, backfill, switch readers, then contract only after old readers are retired. For files or immutable archives, write a new versioned generation and retain the old one. …
Read the whole file at its exact version.
How to install
mdr add fmind/dot/data-migration@git:20260916.50d6810mdr add fmind/dot/data-migration@sha256:2355bc70ddeeb804Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_padxvkrmiprgcqay)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260916.50d6810 latest | 2026-09-16 | 50d6810 | 4,186 B | A | view · diff |
| git:20260912.0ce18c0 | 2026-09-12 | 0ce18c0 | 4,229 B | A | view · diff |
| git:20260911.616be7a | 2026-09-11 | 616be7a | 4,140 B | A | view · diff |
| git:20260909.892d859 | 2026-09-09 | 892d859 | 3,962 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 (4186 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
fmind/dot · 9 stars · license MIT · pushed 2026-09-24 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_padxvkrmiprgcqay GET https://markdownregistry.com/api/v1/resolve?ref=fmind/dot/data-migration GET https://markdownregistry.com/api/v1/blob/2355bc70ddeeb8046197825eb9e13f422df23489233badb300ba53af92733f2b
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