Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add a-pavithraa/springboot-skills-marketplace --skill db-migrationgit clone --depth 1 https://github.com/a-pavithraa/springboot-skills-marketplaceWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/a-pavithraa/springboot-skills-marketplace/db-migration)<a href="https://agentmods.dev/skills/a-pavithraa/springboot-skills-marketplace/db-migration"><img src="https://agentmods.dev/badge/skills/a-pavithraa/springboot-skills-marketplace/db-migration/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/a-pavithraa/springboot-skills-marketplace/db-migration"><img src="https://agentmods.dev/badge/skills/a-pavithraa/springboot-skills-marketplace/db-migration.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00064 | $0.00355 |
| Opus 5.5 | $0.00026 | $0.00142 |
| Sonnet 5.5 | $0.00013 | $0.00071 |
| Haiku 4.5 | $0.00006 | $0.00036 |
Grade A, and why
db-migration scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured today.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Write a database migration
Migrations live in src/main/resources/db/migration.
- Follow the naming the folder already uses. In a folder with no migrations yet, use
V<yyyyMMddHHmm>__<what_it_does>.sqlin UTC: unlikeV7,V8, timestamps don't collide when two developers add a migration on different branches. With numbered names, take the next number after the highest one on the main branch, and renumber yours if someone merges first. - Never edit a migration that is on the main branch. It may already have run on a shared database, and Flyway fails validation when the checksum changes. Write a new migration instead.
- Make destructive changes in two releases. To rename or drop a column, first add the new column and write to both, and drop the old one in a later migration once no running version reads it.
- Keep each migration to one purpose. Put data fixes in their own file, and make them safe to run on a database where the fix is already done.
- Don't let Hibernate create the schema:
spring.jpa.hibernate.ddl-autostaysvalidateornone. - Run
./mvnw verify. If the project has Testcontainers integration tests, they apply every migration to a real database; if it has none, say that the migration is untested.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- today First seen · 16 lines · 64 tokens per session scan A fb0a3b5e380d
db-migration is a skill published in the GitHub repository a-pavithraa/springboot-skills-marketplace (80 stars, last pushed today), licensed MIT. It adds 64 tokens to every session and 355 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-24.
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