055-design-parallel-change SKILL.md skillA
055-design-parallel-change from jabrena/plinth is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jabrena/plinth/055-design-parallel-change@v0.19.0Pins v0.19.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jabrena/plinth
- Path
skills/055-design-parallel-change/SKILL.md- Versions recorded
- 3
- Latest version
- v0.19.0, committed Sep 26, 2026
- First version recorded
- Jul 10, 2026
- Size
- 4,557 bytes
- Repository stars
- 461
- License
- Apache-2.0
Use when a database schema or data-meaning change needs Parallel Change, including expand, migrate, and contract sequencing for column renames, type or data reinterpretation, large-table backfills, relationship-table changes, enum/status transitions, timezone/default changes, and index or uniqueness changes. This should trigger before framework-specific Flyway implementation guidance when deciding whether a migration needs a compatibility window or whether a simpler migration is sufficient.…
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
# Parallel Change Design Guide Java Enterprise developers through Parallel Change for database migration scenarios. **This is an interactive SKILL**. **What is covered in this Skill?** - Deciding whether a database migration needs a compatibility window - Sequencing database changes as expand, migrate, and contract deployable steps - Preserving old and new application versions during rollout and rollback windows - Handling column renames, type or data reinterpretation, large backfills, relationship-table changes, and index or uniqueness changes - Explaining tradeoffs such as temporary dual paths, extra migrations, verification effort, and delayed cleanup - Routing framework-specific implementation to Spring Boot, Quarkus, or Micronaut Flyway skills after the design approach is clear ## Constraints Use Parallel Change as a database migration design pattern, then hand off implementation details to the framework-specific migration skill when needed. - **MUST** read `references/055-design-parallel-change.md` before applying Parallel Change guidance - **MUST** explain expand, migrate, and contract as separate deployable steps when recommending Parallel Change …
Read the whole file at its exact version.
How to install
mdr add jabrena/plinth/055-design-parallel-change@sha256:73b3abc6a161ee44The line at the top of this page pins the label v0.19.0, 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_7kovfym5t3r7blg4)
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Versions
The registry has recorded 3 versions of this file, between Jul 10, 2026 and Sep 26, 2026, about one every 39 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v0.19.0 latest | 2026-09-26 | 9569c35 | 4,557 B | A | view · diff |
| v0.18.0 | 2026-08-01 | 26b0e71 | 4,557 B | A | view · diff |
| v0.17.0 | 2026-07-10 | aaee915 | 4,557 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 (4557 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
jabrena/plinth · 461 stars · license Apache-2.0 · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_7kovfym5t3r7blg4 GET https://markdownregistry.com/api/v1/resolve?ref=jabrena/plinth/055-design-parallel-change GET https://markdownregistry.com/api/v1/blob/73b3abc6a161ee442ca87f1150340b66ea40e56564a275eef44206a31674eee6
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.