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anki/docs-site/addons/hooks-reference.mdx
Luc Mcgrady e9ac48cac2 Docs: Set up Prettier for formatting Mintlify website (#5020)
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## Linked issue (required)

closes #5018
<!-- Fixes #123 / Closes #123 / Refs #123 -->

## Summary / motivation (required)

This prevents large diffs with prettier being used with the mintlify
editor

A caveat of this is that the docs generated by cog now have to be
prettier compatible. Also for some reason prettier has problems with the
{/* */} multi-line comment format so we have to use <!-- --> instead.

Sadly I don't have a good way to check that the Prettier config does not
differ between this PR and the editor.

---------

Co-authored-by: Abdo <abdo@abdnh.net>
2026-06-17 15:54:11 +03:00

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---
title: "Hooks Reference"
description: "A generated reference of all hooks and filters available in Anki for add-on development."
---
This page lists all available hooks in Anki. It is generated from [`pylib/tools/genhooks.py`](https://github.com/ankitects/anki/blob/main/pylib/tools/genhooks.py) and [`qt/tools/genhooks_gui.py`](https://github.com/ankitects/anki/blob/main/qt/tools/genhooks_gui.py).
See [Hooks & Filters](/addons/hooks-and-filters) for usage instructions.
## Backend Hooks (`anki.hooks`)
{/* <<<cog from tools.mintlify_hooks import render_hooks; cog.out("\n" + render_hooks("pylib/tools/genhooks.py").strip())>>> */}
### `card_odue_was_invalid`
No arguments.
No docstring.
---
### `schema_will_change`
**Args:** <code>proceed: bool</code>\
**Returns:** <code>bool</code>
No docstring.
---
### `notes_will_be_deleted`
**Args:** <code>col: <a href='https://dev-docs.ankiweb.net/en/latest/autoapi/anki/collection#anki.collection.Collection'>anki.collection.Collection</a></code>, <code>ids: Sequence[<a href='https://dev-docs.ankiweb.net/en/latest/autoapi/anki/notes#anki.notes.NoteId'>anki.notes.NoteId</a>]</code>
No docstring.
---
### `note_will_be_added`
**Args:** <code>col: <a href='https://dev-docs.ankiweb.net/en/latest/autoapi/anki/collection#anki.collection.Collection'>anki.collection.Collection</a></code>, <code>note: <a href='https://dev-docs.ankiweb.net/en/latest/autoapi/anki/notes#anki.notes.Note'>anki.notes.Note</a></code>, <code>deck_id: <a href='https://dev-docs.ankiweb.net/en/latest/autoapi/anki/decks#anki.decks.DeckId'>anki.decks.DeckId</a></code>
Allows modifying a note before it's added to the collection.
This hook may be called both when users use the Add screen, and when
add-ons like AnkiConnect add notes. It is not called when importing. If
you wish to alter the Add screen, use gui_hooks.add_cards_will_add_note
instead.
---
### `media_files_did_export`
**Args:** <code>count: int</code>
Only used by legacy .apkg exporter. Will be deprecated in the future.
---
### `legacy_export_progress`
**Args:** <code>progress: str</code>
Temporary hook used in transition to new import/export code.
---
### `exporters_list_created`
**Args:** <code>exporters: list[tuple[str, Any]]</code>
No docstring.
---
### `media_file_filter`
**Args:** <code>txt: str</code>\
**Returns:** <code>str</code>
Allows manipulating the file path that media will be read from
---
### `field_filter`
**Args:** <code>field_text: str</code>, <code>field_name: str</code>, <code>filter_name: str</code>, <code>ctx: <a href='https://dev-docs.ankiweb.net/en/latest/autoapi/anki/template#anki.template.TemplateRenderContext'>anki.template.TemplateRenderContext</a></code>\
**Returns:** <code>str</code>
Allows you to define custom `{{filters:..}}`
Your add-on can check filter_name to decide whether it should modify
field_text or not before returning it.
---
### `note_will_flush`
**Args:** <code>note: Note</code>
Allow to change a note before it is added/updated in the database.
---
### `card_will_flush`
**Args:** <code>card: Card</code>
Allow to change a card before it is added/updated in the database.
---
### `card_did_render`
**Args:** <code>output: <a href='https://dev-docs.ankiweb.net/en/latest/autoapi/anki/template#anki.template.TemplateRenderOutput'>anki.template.TemplateRenderOutput</a></code>, <code>ctx: <a href='https://dev-docs.ankiweb.net/en/latest/autoapi/anki/template#anki.template.TemplateRenderContext'>anki.template.TemplateRenderContext</a></code>
Can modify the resulting text after rendering completes.
---
### `importing_importers`
**Args:** <code>importers: list[tuple[str, Any]]</code>
Allows updating the list of importers.
The resulting list is not saved and should be changed each time the
filter is called.
NOTE: Updates to the import/export code are expected in the coming
months, and this hook may be replaced with another solution at that
time. Tracked on https://github.com/ankitects/anki/issues/1018
---
### `deck_added` _(Obsolete)_
**Args:** <code>deck: <a href='https://dev-docs.ankiweb.net/en/latest/autoapi/anki/decks#anki.decks.DeckDict'>anki.decks.DeckDict</a></code>
<Warning>
Obsolete, do not use.
</Warning>
---
### `note_type_added` _(Obsolete)_
**Args:** <code>notetype: <a href='https://dev-docs.ankiweb.net/en/latest/autoapi/anki/models#anki.models.NotetypeDict'>anki.models.NotetypeDict</a></code>
<Warning>
Obsolete, do not use.
</Warning>
---
### `sync_stage_did_change` _(Obsolete)_
**Args:** <code>stage: str</code>
<Warning>
Obsolete, do not use.
</Warning>
---
### `sync_progress_did_change` _(Obsolete)_
**Args:** <code>msg: str</code>
<Warning>
Obsolete, do not use.
</Warning>
{/* <<<end>>> */}