database-engine-selection-and-migration SKILL.md skillA
database-engine-selection-and-migration from robsonkades/agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add robsonkades/agent-skills/database-engine-selection-and-migration@git:20261016.c769bd8Pins git:20261016.c769bd8 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- robsonkades/agent-skills
- Path
skills/database-engine-selection-and-migration/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261016.c769bd8, committed Oct 16, 2026
- First version recorded
- Sep 6, 2026
- Size
- 7,917 bytes
- Repository stars
- 3
- License
- Apache-2.0
Choosing among SQL Server, MySQL/InnoDB, and PostgreSQL for a greenfield system, or planning a migration between them, from explicit semantic, workload, operational, JVM-driver, DDL, cost, and team constraints. Use when an ADR, proof of concept, compatibility inventory, shadow validation, or reversible cutover is needed. Not a generic product ranking or live query-tuning workflow.
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 Engine Selection and Migration ## Purpose Make the accepted trade-offs and non-portable assumptions visible before an engine choice or cutover. Start with vetoes and behavioral proof, not a weighted feature popularity score. ## Decision inputs For an existing system, establish the outcome requiring change and whether migration or its destination is already mandated. If the choice remains open, include retaining the current engine as a baseline and assess whether a targeted query/index, configuration or supported-version change meets the same success criteria. Route unexplained slowness to `database-performance` before treating migration as its remedy; reuse accepted decisions when the target is fixed. ```text read/write/admin SLOs, availability, RPO/RTO, retention, and growth: OLTP/analytic/hybrid workload, data shape/distribution, working set, and peak concurrency: transaction invariants and anomalies the domain permits or forbids: what an acknowledged commit must survive: process crash, host/storage loss, or failover: topology, regions, replication/CDC, backup/restore, and failover requirements: …
Read the whole file at its exact version.
How to install
mdr add robsonkades/agent-skills/database-engine-selection-and-migration@sha256:058b02102f2d754eThe line at the top of this page pins the label git:20261016.c769bd8, 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_fszzdmoyxrxgfefu)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Sep 6, 2026 and Oct 16, 2026, about one every 10 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261016.c769bd8 latest | 2026-10-16 | c769bd8 | 7,917 B | A | view · diff |
| git:20260927.9ecadfd | 2026-09-27 | 9ecadfd | 7,612 B | A | view · diff |
| git:20260923.832673e | 2026-09-23 | 832673e | 6,953 B | A | view · diff |
| git:20260911.37b054b | 2026-09-11 | 37b054b | 6,883 B | A | view · diff |
| git:20260906.e6ad4bd | 2026-09-06 | e6ad4bd | 6,415 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 (7917 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
robsonkades/agent-skills · 3 stars · license Apache-2.0 · pushed 2026-10-28 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_fszzdmoyxrxgfefu GET https://markdownregistry.com/api/v1/resolve?ref=robsonkades/agent-skills/database-engine-selection-and-migration GET https://markdownregistry.com/api/v1/blob/058b02102f2d754e2d0a86468baf9a7fc34d243cc6bb245fe779c4a0fbd32b14
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.