Reversible Migration
JuliusBrussee/caveman
Implement reversible compatibility-safe transitions. Use for schema, data, API, protocol, configuration, or dependency migrations requiring rollback and…
A skill your agent uses when moving a Butterbase app between regions, checking migration progress, aborting a stuck move, reverse-rolling a completed move, or tearing down retained source replicas…
MITAuto-check passed
Install Migrations
$ npx skills add butterbase-ai/butterbase-skills --skill migrations -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install butterbase-ai/butterbase-skills migrations --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/butterbase-ai/butterbase-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/migrations .claude/skills/migrations && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "migrations" agent skill from https://github.com/butterbase-ai/butterbase-skills/tree/main/skills/migrations into .claude/skills/migrations/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "migrations", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/butterbase-ai/butterbase-skills/tree/main/skills/migrationsType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add butterbase-ai/butterbase-skills --skill migrations -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install butterbase-ai/butterbase-skills migrations --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/butterbase-ai/butterbase-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/migrations .agents/skills/migrations && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "migrations" agent skill from https://github.com/butterbase-ai/butterbase-skills/tree/main/skills/migrations into .agents/skills/migrations/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "migrations", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add butterbase-ai/butterbase-skills --skill migrations -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install butterbase-ai/butterbase-skills migrations --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/butterbase-ai/butterbase-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/migrations .cursor/skills/migrations && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "migrations" agent skill from https://github.com/butterbase-ai/butterbase-skills/tree/main/skills/migrations into .cursor/skills/migrations/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "migrations", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/butterbase-ai/butterbase-skills.git --path skills/migrations--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add butterbase-ai/butterbase-skills --skill migrations -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install butterbase-ai/butterbase-skills migrations --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/butterbase-ai/butterbase-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/migrations .gemini/skills/migrations && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "migrations" agent skill from https://github.com/butterbase-ai/butterbase-skills/tree/main/skills/migrations into .gemini/skills/migrations/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "migrations", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install butterbase-ai/butterbase-skills migrationsInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add butterbase-ai/butterbase-skills --skill migrations -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/butterbase-ai/butterbase-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/migrations .github/skills/migrations && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "migrations" agent skill from https://github.com/butterbase-ai/butterbase-skills/tree/main/skills/migrations into .github/skills/migrations/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "migrations", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add butterbase-ai/butterbase-skills --skill migrations -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install butterbase-ai/butterbase-skills migrations --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/butterbase-ai/butterbase-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/migrations .opencode/skills/migrations && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "migrations" agent skill from https://github.com/butterbase-ai/butterbase-skills/tree/main/skills/migrations into .opencode/skills/migrations/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "migrations", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
migrations- GitHub stars
- 534
- Token cost
- ~948 tokens
- SKILL.md length
- 407 words
- Files
- 1
- Skills in repo
- 39
- Repo updated
- First seen
- Licence
- MIT
At a glance
A skill your agent uses when moving a Butterbase app between regions, checking migration progress, aborting a stuck move, reverse-rolling a completed move, or tearing down retained source replicas…
- Works in 6 steps: The step sequence → Start a move → Recovery: pick the right escape hatch → …
- Moving a Butterbase app between regions
- SKILL.md covers 1. The step sequence, 2. Start a move, 3. Recovery: pick the right… and 4. Inspecting in-flight +…, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Migrations is an agent skill from butterbase-ai/butterbase-skills. Use when moving a Butterbase app between regions, checking migration progress, aborting a stuck move, reverse-rolling a completed move, or tearing down retained source replicas after a move is stable
Its SKILL.md is about 950 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
The repository describes itself as: Plugin for Butterbase.ai. The licence is MIT.
When your agent uses it
- Moving a Butterbase app between regions
- Checking migration progress
- Aborting a stuck move
- Reverse-rolling a completed move
Example prompts
- “/migrations”
Workflow steps
6 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit aa8ae69. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Migrations loads about 948 tokens when it runs. Until then it costs about 53 tokens; SKILL.md has 407 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from butterbase-ai/butterbase-skills at commit aa8ae69, republished under its MIT licence (© butterbase-ai). 407 words, ~948 tokens.
Download SKILL.mdSave it as
.claude/skills/migrations/SKILL.md (or your agent's skills folder).- name
- migrations
- description
- Use when moving a Butterbase app between regions, checking migration progress, aborting a stuck move, reverse-rolling a completed move, or tearing down retained source replicas after a move is stable
Butterbase App Migrations (Multi-Region)
Moving an app between regions is an orchestrated migration: data dumped from source, restored in dest, blobs copied, runtime brought up, then traffic flipped. Source replica is retained for safe rollback until you tear it down.
Four small tools wrap the orchestration:
| Tool | Purpose |
|---|---|
list_regions | Discover what regions exist before suggesting one. |
move_app | Start a migration. Returns a migration_id. |
move_app_status | Read the current step + replica state of a specific migration. |
manage_migrations | Operational ops: get_active, abort, reverse, list_source_replicas. |
teardown_source_replica | Decommission the retained source replica once you're confident. |
1. The step sequence
A successful move walks through 11 steps in order:
requested → reserving_dest → blocking_writes → dumping_data →
restoring_data → copying_blobs → copying_runtime → flipping_routing →
setting_up_reverse_replication → unblocking_writes → completedThe cutover happens at flipping_routing. Before that, the app is still served from the source. After that, traffic is on the destination.
Terminal states: completed, aborted, failed.
2. Start a move
list_regions → confirm dest region is supported
move_app(app_id, dest_region) → { migration_id, status: "queued" }Then poll with move_app_status({ app_id, migration_id }) every few seconds (or call manage_migrations({ action: "get_active", app_id }) if you've forgotten the id).
3. Recovery: pick the right escape hatch
Stuck or wrong choice? Different state, different tool:
- Before
flipping_routing(still in dump / restore / copy phases): usemanage_migrationsaction: "abort". Cancels cleanly; no data flipped. - After
flipping_routing(already cut over): abort is locked. Usemanage_migrationsaction: "reverse". This rolls back to source — works only while the source replica is still retained (i.e. you haven't calledteardown_source_replicayet). - Move is done and stable (the new region is serving traffic without issues for a while): use
teardown_source_replica({ migration_id }). Stops paying for source-region storage. After this,reverseis no longer available.
Show full SKILL.md (158 more words)Show less
4. Inspecting in-flight + retained state
manage_migrations({ action: "get_active", app_id })→{ migration: AppMigration | null }. Tells you if a move is in progress right now.manage_migrations({ action: "list_source_replicas" })→ all retained replicas the caller owns. Call this before any teardown so you know what you'd lose.
5. Common pitfalls
- Calling
move_appagain while one is active — backend returns 409ineligible. Resolve by waiting for the active migration to terminate, or aborting it first. - Trying to abort after cutover — returns 409. The path forward is
reverse, not abort. - Tearing down a replica too early — once it's gone, reverse-move is no longer possible. Verify the destination region has been serving traffic cleanly before teardown.
- Forgetting
dest_regionis validated — invalid slugs return 400. Alwayslist_regionsfirst if you're not sure.
6. What this skill does NOT cover
- Schema migrations (table/column changes) — use
butterbase-skills:schema-design. - Region selection at app creation time — use
init_appdirectly with theregionparameter. - Cross-region replica reads (none — Butterbase is single-region-active per app).
© butterbase-ai, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in skills/migrations of butterbase-ai/butterbase-skills.
Open the folder on GitHubat commit aa8ae69
Compare with similar skills
Migrations next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Migrations this skillbutterbase-ai/butterbase-skills | 534 | — | ~948 | Automated safety check: Pass | MIT | |
| Reversible MigrationJuliusBrussee/caveman | 111k | 1 repos | ~196 | Automated safety check: Pass | Apache-2.0 | |
| Database Migrationsaffaan-m/ECC | 276k | 4 repos | ~3k | Automated safety check: Pass | MIT | |
| Database Migrationsaffaan-m/ECC | 276k | 1 repos | ~2.4k | Automated safety check: Pass | MIT | |
| Cognee Database Migrationstopoteretes/cognee | 32k | — | ~2.6k | Automated safety check: Notes | Apache-2.0 | |
| Safe Database Migration Patternsaffaan-m/ECC | 276k | — | ~3.3k | Automated safety check: Pass | MIT |
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Questions about Migrations
What does Migrations do?
A skill your agent uses when moving a Butterbase app between regions, checking migration progress, aborting a stuck move, reverse-rolling a completed move, or tearing down retained source replicas…. Migrations is an agent skill from butterbase-ai/butterbase-skills.
When should I use Migrations?
Migrations fits situations like: moving a Butterbase app between regions; checking migration progress; aborting a stuck move; reverse-rolling a completed move.
How do I install Migrations in Claude Code?
Run `npx skills add butterbase-ai/butterbase-skills --skill migrations -a claude-code`. Or copy the skill folder (skills/migrations in butterbase-ai/butterbase-skills) into .claude/skills/migrations in your project. Claude Code loads it when a task matches its description.
How do I install Migrations in Codex?
Run `npx skills add butterbase-ai/butterbase-skills --skill migrations -a codex`. Or copy the skill folder (skills/migrations in butterbase-ai/butterbase-skills) into .agents/skills/migrations in your project. Codex loads it when a task matches its description.
Can I use Migrations in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add butterbase-ai/butterbase-skills --skill migrations -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/migrations, .gemini/skills/migrations, .github/skills/migrations and .opencode/skills/migrations in your project.
What does Migrations need to run?
SKILL.md names no scripts, command-line tools or credentials: Migrations is instructions for the agent only.
Does Migrations access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Migrations safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Migrations use?
Migrations is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Migrations use?
About 948 tokens (SKILL.md is roughly 3.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Migrations?
Skills that share tags, products or a category with Migrations: Reversible Migration (JuliusBrussee/caveman, 111k stars), Database Migrations (affaan-m/ECC, 276k stars), Database Migrations (affaan-m/ECC, 276k stars) and Cognee Database Migrations (topoteretes/cognee, 32k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Migrations?
butterbase-ai (a GitHub organization) maintains it in butterbase-ai/butterbase-skills, which has 534 GitHub stars. The repository holds 39 skills in this directory. The repository was last updated on October 5, 2026.
Source: butterbase-ai/butterbase-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.