Install the "safe-migration" agent skill from https://github.com/aropan/clist/tree/master/.agents/skills/safe-migration into .claude/skills/safe-migration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "safe-migration", 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.
Type 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.
skills CLI
$ npx skills add aropan/clist --skill safe-migration -a codex
Project install goes to .agents/skills/; add -g for ~/.codex/skills/.
Install the "safe-migration" agent skill from https://github.com/aropan/clist/tree/master/.agents/skills/safe-migration into .agents/skills/safe-migration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "safe-migration", 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.
skills CLI
$ npx skills add aropan/clist --skill safe-migration -a cursor
Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.
Install the "safe-migration" agent skill from https://github.com/aropan/clist/tree/master/.agents/skills/safe-migration into .cursor/skills/safe-migration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "safe-migration", 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.
--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
skills CLI
$ npx skills add aropan/clist --skill safe-migration -a gemini-cli
Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.
Install the "safe-migration" agent skill from https://github.com/aropan/clist/tree/master/.agents/skills/safe-migration into .gemini/skills/safe-migration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "safe-migration", 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.
GitHub CLI
$ gh skill install aropan/clist safe-migration
Installs 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).
skills CLI
$ npx skills add aropan/clist --skill safe-migration -a github-copilot
Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.
Install the "safe-migration" agent skill from https://github.com/aropan/clist/tree/master/.agents/skills/safe-migration into .github/skills/safe-migration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "safe-migration", 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.
skills CLI
$ npx skills add aropan/clist --skill safe-migration -a opencode
OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
Install the "safe-migration" agent skill from https://github.com/aropan/clist/tree/master/.agents/skills/safe-migration into .opencode/skills/safe-migration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "safe-migration", 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
safe-migration
GitHub stars
439
Token cost
~577 tokens
SKILL.md length
257 words
Files
1
Skills in repo
4
Repo updated
First seen
Licence
Apache-2.0
At a glance
Plan, create, or apply CLIST Django schema and data migrations, including model field changes, makemigrations, migrate, and RunPython operations.
Works in 6 steps: Inspect first. Read the target model in… → Find all usages of any field/table you… → Prefer additive changes. Add new… → …
Tasks that involve Backend development
SKILL.md covers Procedure, Hard rules and When done, report
Calls docker
What it does
Safe Migration is an agent skill from aropan/clist. Plan, create, or apply CLIST Django schema and data migrations, including model field changes, makemigrations, migrate, and RunPython operations. Preserve reversibility and check database impact.
Its SKILL.md is about 580 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Backend & APIs, covering Backend development. It works with Django. The repository describes itself as: Your comprehensive guide to global programming contests. Track events, get details, and never miss a competition. The licence is Apache-2.0.
When your agent uses it
Tasks that involve Backend development
Example prompts
“/safe-migration”
Requirements
Docker
Workflow steps
6 steps, taken from the first numbered list in SKILL.md.
1Inspect first. Read the target model in src//models.py and look at
2Find all usages of any field/table you plan to change or remove
3Prefer additive changes. Add new nullable fields rather than renaming or
4Generate schema migrations and review them
5Apply only when applying to the target database is part of the task.
6Verify relevant tests and Django checks. If the migration was applied,
What it can do on your machine
Read from SKILL.md and the folder at commit 827e89a. 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
Shell commands in SKILL.md call:
docker
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use docker, which can reach the network depending on how they are called.
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
Safe Migration loads about 577 tokens when it runs. Until then it costs about 53 tokens; SKILL.md has 257 words of instructions outside code blocks.
Always· name and description, kept in context so the agent knows when to use it
~53
When it runs· the whole SKILL.md, loaded when a task matches
~577
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.
Download SKILL.mdSave it as .claude/skills/safe-migration/SKILL.md (or your agent's skills folder).
name
safe-migration
description
Plan, create, or apply CLIST Django schema and data migrations, including model field changes, makemigrations, migrate, and RunPython operations. Preserve reversibility and check database impact.
Safe Django migrations in CLIST
Database changes are the highest-risk edits in this repo. The DB runs in the
db container and holds real data. Be conservative.
Procedure
Inspect first. Read the target model in src/<app>/models.py and look at
recent migrations in src/<app>/migrations/ to match style.
Find all usages of any field/table you plan to change or remove
(rg across src/ and legacy/). Removing or renaming something
still referenced will break the app.
Prefer additive changes. Add new nullable fields rather than renaming or
dropping. For a rename, prefer add-new → backfill → switch readers → remove
old, across separate migrations.
Generate schema migrations and review them:bash
docker compose exec dev ./manage.py makemigrations <app>
docker compose exec dev ./manage.py makemigrations --check --dry-run
Data migrations may require a reviewed RunPython operation.
Apply only when applying to the target database is part of the task.
Confirm the environment and review the generated operations first:bash
docker compose exec dev ./manage.py migrate <app>
Verify relevant tests and Django checks. If the migration was applied,
verify the affected app still imports and behaves as expected.
Hard rules
Never edit an already-applied historical migration unless explicitly
asked. Add a new one instead.
Never run DROP / DELETE / TRUNCATE or an irreversible data migration
without explicit user approval.
Don't rename or drop a column/table without first proving it's unused.
If a data migration is needed, make it reversible (RunPython with a reverse
function) where feasible, and call out anything that isn't.
Treat src/clist/, src/true_coders/, src/my_oauth/, src/ranking/
models as high-traffic — extra care.
When done, report
The migration created, whether it was applied, backward-compatibility risks, and
any manual backfill/cleanup step a human still needs to run.
Safe Migration 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.
Generates and splits Django schema migrations for Saleor with manage.py makemigrations, enforcing one new model or one field change per migration file.
Scans any project codebase for new/changed modules, endpoints, middleware, infrastructure, Docker topologies, SQL queries, or permissions and updates docs/architecture/architecture.json.
Add, fix, or debug a Django standings parser in src/ranking/management/modules/, including Statistic.getstandings, leaderboard scraping, and offline regression fixtures.
Choose and run focused checks after changing CLIST Python code: Django tests, standalone pytest tests, offline parser fixtures, Ruff, or a relevant management-command check.
Plan, create, or apply CLIST Django schema and data migrations, including model field changes, makemigrations, migrate, and RunPython operations. Safe Migration is an agent skill from aropan/clist. Plan, create, or apply CLIST Django schema and data migrations, including model field changes, makemigrations, migrate, and RunPython operations.
When should I use Safe Migration?
Safe Migration fits situations like: tasks that involve Backend development.
How do I install Safe Migration in Claude Code?
Run `npx skills add aropan/clist --skill safe-migration -a claude-code`. Or copy the skill folder (.agents/skills/safe-migration in aropan/clist) into .claude/skills/safe-migration in your project. Claude Code loads it when a task matches its description.
How do I install Safe Migration in Codex?
Run `npx skills add aropan/clist --skill safe-migration -a codex`. Or copy the skill folder (.agents/skills/safe-migration in aropan/clist) into .agents/skills/safe-migration in your project. Codex loads it when a task matches its description.
Can I use Safe Migration 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 aropan/clist --skill safe-migration -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/safe-migration, .gemini/skills/safe-migration, .github/skills/safe-migration and .opencode/skills/safe-migration in your project.
What does Safe Migration need to run?
Going by SKILL.md and its folder, Safe Migration needs the command-line tools its instructions call (docker). Our summary lists: Docker.
Does Safe Migration access the network?
SKILL.md contains no URLs. Its commands use docker, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Safe Migration 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 Safe Migration use?
Safe Migration is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Safe Migration use?
About 577 tokens (SKILL.md is roughly 2.3k 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 Safe Migration?
Skills that share tags, products or a category with Safe Migration: Saleor Django Schema Migration (saleor/saleor, 23k stars), Django Access Review (getsentry/skills, 1k stars), Silk Profiler (baserow/baserow, 6.1k stars) and Arch Wiki (ahmedemad3/arch-wiki, 249 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Safe Migration?
aropan (a GitHub user) maintains it in aropan/clist, which has 439 GitHub stars. The repository holds 4 skills in this directory. The repository was last updated on October 4, 2026.
Source: aropan/clist on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.
