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safe-migrations

95 / 100 · Low risk

Fine to try. Some of what it can do is expected: a devops skill usually runs commands, installs tools and uses cloud credentials.

By MadBomber/experiments (GitHub) · devops · 11 stars · scanned at commit 8139ff6

Write zero-downtime database migrations for Ruby on Rails — strong_migrations rules, the add-column / set-default / backfill / enforce-NOT-NULL multi-deploy split, disable_ddl_transaction!, concurrent index creation on PostgreSQL, find_each batching, why change_column is dangerous, the deploy/migrate/deploy sequencing. Use when writing or reviewing Rails migrations, adding a column to a large table, removing or renaming columns, adding NOT NULL or foreign keys, adding indexes on big tables, whe…

Works with any agent that supports SKILL.md skills.

What this skill can do

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'safe-migrations' ] || [ -L ~/.agents/skills/'safe-migrations' ]; then echo 'A skill folder named safe-migrations already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/MadBomber/experiments' "$d" && git -C "$d" checkout --quiet '8139ff68e8895b544661aa2ba8b53268d68652bc' -- 'ai_misc/skills/rails-skills/05-safe-migrations' && mkdir -p ~/.agents/skills && cp -R "$d"/'ai_misc/skills/rails-skills/05-safe-migrations' ~/.agents/skills/'safe-migrations' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'safe-migrations' ~/.claude/skills/'safe-migrations' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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