Official agent skill

Django Migrations

by PostHog in PostHog/posthog

Django migration patterns and safety workflow for PostHog. An agent skill from PostHog/posthog.

OfficialCustom licenceAuto-check passedBackend & APIs

Install Django Migrations

skills CLI
$ npx skills add PostHog/posthog --skill django-migrations -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install PostHog/posthog django-migrations --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/django-migrations .claude/skills/django-migrations && rm -rf skills-src

Use ~/.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/

Facts

Skill name
django-migrations
GitHub stars
40k
Token cost
~5k tokens
SKILL.md length
2,662 words
Files
1
Skills in repo
252
Repo updated
First seen
Licence
Custom licence

At a glance

Django migration patterns and safety workflow for PostHog. An agent skill from PostHog/posthog.

  • Works in 3 steps: Remove all usage and the model class.… → Deploy, wait at least one full deploy… → SafeDropTable later in a NEW migration —…
  • Reviewing Django/Postgres migrations
  • SKILL.md covers Never delete a migration file, Retire a column, Retire dedicated migration tests and Growing enums need callable…, plus 6 more sections
  • Calls python, rg and git

What it does

Django Migrations is an agent skill from PostHog/posthog, published by the product's own GitHub organization. Django migration patterns and safety workflow for PostHog. Use when creating, adjusting, or reviewing Django/Postgres migrations, including non-blocking index/constraint changes, multi-phase schema changes, data backfills, migration conflict rebasing, and product model moves that require SeparateDatabaseAndState. Also use for any deletion or removal of a model, table, column, product, or app — including deleting migration files or retiring a feature — even when no migration is written.

Its SKILL.md is about 5k 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, PostHog and PostgreSQL. The repository describes itself as: :hedgehog: PostHog is the leading platform for building self-driving products. Our developer tools – AI observability, analytics, session replay, flags, experiments, error…

When your agent uses it

  • Reviewing Django/Postgres migrations
  • Including non-blocking index/constraint changes
  • Multi-phase schema changes
  • Migration conflict rebasing

Example prompts

  • “/django-migrations”

Requirements

  • Python 3
  • Node.js

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

  1. Remove all usage and the model class. makemigrations, then wrap the generated DeleteModel in…
  2. Deploy, wait at least one full deploy cycle.
  3. SafeDropTable later in a NEW migration — never by deleting old files. Treat this as owed work rather than an option whenever step 1 left a…

What it can do on your machine

Read from SKILL.md and the folder at commit 10f9ad7. 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:

    • python
    • rg
    • git

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use git, 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

Django Migrations loads about 5k tokens when it runs. Until then it costs about 127 tokens; SKILL.md has 2,662 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~127
When it runs · the whole SKILL.md, loaded when a task matches
~5k

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

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 2,662 words (~5,032 tokens).

“Before you propose a change to the migration history or to how migrations run, check things already tried. It records the closed attempts at squashing the history and at the Person table cutover.”

— opening of SKILL.md by PostHog, Custom licence
name
django-migrations

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .agents/skills/django-migrations of PostHog/posthog.

Open the folder on GitHubat commit 10f9ad7

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders. This page covers the copy in PostHog/posthog, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Django 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.

Django Migrations compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Django Migrations this skillPostHog/posthog40k—~5kAutomated safety check: PassCustom licence
Silk Profilerbaserow/baserow6.1k—~2.9kAutomated safety check: PassCustom licence
Django Safe Migrationvintasoftware/django-ai-plugins151—~4.4kAutomated safety check: PassNone
Djangoericrisco/rsc-harness167—~3.1kAutomated safety check: PassMIT
Django Index Designhashgraph-online/awesome-codex-plugins1.2k—~643Automated safety check: PassMIT
Django Materialized Viewshashgraph-online/awesome-codex-plugins1.2k—~611Automated safety check: PassMIT

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Categories

Questions about Django Migrations

What does Django Migrations do?

Django migration patterns and safety workflow for PostHog. An agent skill from PostHog/posthog. Django Migrations is an agent skill from PostHog/posthog, published by the product's own GitHub organization. Django migration patterns and safety workflow for PostHog.

When should I use Django Migrations?

Django Migrations fits situations like: reviewing Django/Postgres migrations; including non-blocking index/constraint changes; multi-phase schema changes; migration conflict rebasing.

How do I install Django Migrations in Claude Code?

Run `npx skills add PostHog/posthog --skill django-migrations -a claude-code`. Or copy the skill folder (.agents/skills/django-migrations in PostHog/posthog) into .claude/skills/django-migrations in your project. Claude Code loads it when a task matches its description.

How do I install Django Migrations in Codex?

Run `npx skills add PostHog/posthog --skill django-migrations -a codex`. Or copy the skill folder (.agents/skills/django-migrations in PostHog/posthog) into .agents/skills/django-migrations in your project. Codex loads it when a task matches its description.

Can I use Django 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 PostHog/posthog --skill django-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/django-migrations, .gemini/skills/django-migrations, .github/skills/django-migrations and .opencode/skills/django-migrations in your project.

What does Django Migrations need to run?

Going by SKILL.md and its folder, Django Migrations needs the command-line tools its instructions call (python, rg and git). Our summary lists: Python 3; Node.js.

Does Django Migrations access the network?

SKILL.md contains no URLs. Its commands use git, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Django 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 Django Migrations use?

Django Migrations has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Django Migrations use?

About 5k tokens (SKILL.md is roughly 20k 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 Django Migrations?

Skills that share tags, products or a category with Django Migrations: Silk Profiler (baserow/baserow, 6.1k stars), Django Safe Migration (vintasoftware/django-ai-plugins, 151 stars), Django (ericrisco/rsc-harness, 167 stars) and Django Index Design (hashgraph-online/awesome-codex-plugins, 1.2k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Django Migrations?

PostHog (a GitHub organization, an official publisher) maintains it in PostHog/posthog, which has 40,182 GitHub stars. The repository holds 252 skills in this directory. The repository was last updated on October 8, 2026.

Source: PostHog/posthog on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.