db-migration

db-migration is a skill for Claude Code, Codex from klhq/skillmux. It costs 47 tokens per session (106 once invoked), scanned A, original, MIT.

A database migration workflow for changing a database's structure and moving existing data. It covers migration scripts, rollback plans, and checks before production release.

In plain words
What is it for?
Use it to plan schema changes, write migration scripts, define rollback steps, and review a migration before deploying it to production.
Why use it?
Database changes can break an application or leave data inconsistent if applied without a safe plan. This helps prepare a way to undo changes and check them before release.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to plan schema changes, write migration scripts, define rollback steps, and review a migration before deploying it to production.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/klhq/skillmux/db-migration
Install

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.

Any agent
npx skills add klhq/skillmux --skill db-migration
Clone the repo
git clone --depth 1 https://github.com/klhq/skillmux

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for db-migration

README.md
[![agentmods](https://agentmods.dev/badge/skills/klhq/skillmux/db-migration/github.svg)](https://agentmods.dev/skills/klhq/skillmux/db-migration)
Your own site
<a href="https://agentmods.dev/skills/klhq/skillmux/db-migration"><img src="https://agentmods.dev/badge/skills/klhq/skillmux/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.

agentmods 80×15 button for db-migration

Your own site · 80×15
<a href="https://agentmods.dev/skills/klhq/skillmux/db-migration"><img src="https://agentmods.dev/badge/skills/klhq/skillmux/db-migration.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 106 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00047 $0.00106
Opus 5.5 $0.00019 $0.00042
Sonnet 5.5 $0.00009 $0.00021
Haiku 4.5 $0.00005 $0.00011

Measured yesterday against content hash c72bd54066c5, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

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 yesterday.

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.

eval/multilingual/vault/db-migration/SKILL.md · 9 lines

What it actually says

資料庫遷移

規劃與執行資料庫 schema 變更與資料遷移,包含建立遷移腳本、回滾策略與正式環境上線前的檢查。

Changes

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.

  1. yesterday First seen · 9 lines · 47 tokens per session scan A c72bd54066c5

Subscribe to this mod's changes

db-migration is a skill published in the GitHub repository klhq/skillmux (2 stars, last pushed yesterday), licensed MIT. It adds 47 tokens to every session and 106 once invoked, about $0.0002 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 2026-10-25.

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