migrate-api

A guide for Drupal’s Migrate API, which moves data from sources such as another content-management system, database, CSV file, or web service into Drupal. It explains the extract, transform, and load process.

In plain words
What is it for?
Use it to build migration source, processing, and destination plugins, define migration groups and dependencies, or import content, users, tags, and other entities.
Why use it?
It provides patterns for mapping, converting, connecting, and importing data without writing each migration from scratch.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/abderrahimghazali/drupal-boost/migrate-api
Any agent
npx skills add abderrahimghazali/drupal-boost --skill migrate-api
Clone the repo
git clone --depth 1 https://github.com/abderrahimghazali/drupal-boost

Made for: Claude Code, Codex.

Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,044 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00045 $0.01044
Opus 5 $0.00023 $0.00522
Sonnet 5 $0.00009 $0.00209
Haiku 4.5 $0.00005 $0.00104

Measured 2d ago against content hash 6036a06fd58a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

migrate-api 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 2d ago.

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.

skills/migrate-api/SKILL.md · 198 lines

How it starts

The opening of the file, as written. The whole thing — 198 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Drupal Migrate API

The Migrate API follows an ETL (Extract-Transform-Load) pattern.

Migration YAML Structure

id: my_migration
label: 'Migrate articles from legacy database'
migration_group: my_migrations
migration_tags:
  - content

source:
  plugin: d7_node  # or csv, url, json, etc.
  node_type: article

process:
  title: title
  body/value: body
  body/format:
    plugin: default_value
    default_value: basic_html
  uid:
    plugin: migration_lookup
    migration: my_users_migration
    source: author_id
  field_tags:
    plugin: sub_process
    source: tags
    process:
      target_id:
        plugin: entity_generate
        source: name
        entity_type: taxonomy_term
        bundle: tags
        bundle_key: vid
        value_key: name

destination:
  plugin: entity:node
  default_bundle: article

migration_dependencies:
  required:
    - my_users_migration
  optional:
    - my_tags_migration

Common Source Plugins

Database Source

source:
  plugin: d7_node
  node_type: article
  # Or custom SQL:
  plugin: custom_sql
  query: "SELECT id, title, body FROM legacy_articles"

CSV Source (requires migrate_source_csv)

source:
  plugin: csv
  path: /path/to/data.csv
  ids: [id]
  header_offset: 0
  fields:
    - name: id
    - name: title
    - name: body

JSON/URL Source (requires migrate_plus)

source:
  plugin: url
  data_fetcher_plugin: http
  data_parser_plugin: json
  urls:
    - 'https://api.example.com/articles'
  item_selector: /data
  fields:
    - name: id
      selector: /id
    - name: title
      selector: /attributes/title
  ids:
    id:
      type: integer

Common Process Plugins

process:
  # Direct copy
  title: source_title

  # Default value
  status:
    plugin: default_value
    default_value: 1

  # Value mapping
  field_type:
    plugin: static_map
    source: legacy_type
    map:
      news: article
      blog: blog_post

  # Entity lookup/generate
  uid:
    plugin: migration_lookup
    migration: users
    source: author_id

  # Date formatting
  created:
    plugin: format_date
    source: date
    from_format: 'Y-m-d H:i:s'
    to_format: 'U'

  # Concatenation
  path:
    plugin: concat
    source:
      - constants/prefix
      - slug
    delimiter: /

  # Skip empty
  field_image:
    - plugin: skip_on_empty
      source: image_url
      method: process
    - plugin: file_copy
      source: image_url
      destination: 'public://images/'

  # Callback
  title:
    plugin: callback
    callable: trim
    source: title

Read the full file on GitHub · 198 lines

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 2d ago First seen · 198 lines · 45 tokens per session scan A 6036a06fd58a

Subscribe to this mod's changes

migrate-api is a skill published in the GitHub repository abderrahimghazali/drupal-boost (1 stars, last pushed 5mo ago), licensed MIT. It adds 45 tokens to every session and 1,044 once invoked, about $0.0002 per session on Opus 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 2026-08-31.

Related

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