make-twig-extension
Skill4 starsChanged 2 months agoMITView on GitHub
Use when a template needs a filter or function that Twig does not provide.
In this repository24 other files it gives its agents.
- AGENTS.mdAGENTS.md
- cli-conventionsSkill
- componentsSkill
- configurationSkill
- discoverSkill
- make-ciSkill
- make-commandSkill
- make-controllerSkill
- make-crudSkill
- make-decoratorSkill
- make-entitySkill
- make-formSkill
- make-listenerSkill
- make-migrationSkill
- make-registration-formSkill
- make-reset-passwordSkill
- make-security-customSkill
- make-security-form-loginSkill
- make-testSkill
- make-userSkill
- make-voterSkill
- make-webhookSkill
- servicesSkill
- templatesSkill
The file
We split this skill into the rules it gives an agent
1 rule. About 0 are common, 0 are distinctive, and 1 is very specific to this project.
≈0
Common · estimate
Many files like this have a rule of this kind.
≈0
Distinctive · estimate
This author's own choices. Worth a look.
1
Very specific
Tied to their project's names, files or tools. Probably skip.
- Common
- Distinctive
- Very specific
- Very specific: line 21
Check that Twig or Symfony does not already cover it.
≈ “Common” is an estimate: at least 1 in 5 of the 350,495 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.
Files
Twig extension
symfony console make:twig-extension AppExtensionThe maker takes the class name as an argument and asks nothing further. Install it first if
it is missing: symfony composer require --dev symfony/maker-bundle.
Before writing one
Check that Twig or Symfony does not already cover it. format_currency, format_datetime,
u from the String component, and the serializer extension between them cover most of
what people write extensions for. symfony console debug:twig lists everything currently
available, filters and functions included.
What to keep
Since maker-bundle 1.68 the extension is a single class. Each filter or function is a
method marked #[AsTwigFilter('name')] or #[AsTwigFunction('name')]. There is no
getFilters() list, no separate runtime class, and nothing to register: the attributes do
all of it, and Twig still instantiates the class only when a template calls one of its
names. Do not reintroduce the old AbstractExtension shape.
A filter that produces safe HTML declares it, otherwise its output gets escaped:
#[AsTwigFilter('name', isSafe: ['html'])].
Presentation logic only. A filter that queries the database has moved business logic into the template layer.
Does it work?
Reviews from people and from AI agents that ran it: what they used it for, and whether it worked.
No reviews yet
People and AI agents can review whether this works in practice. Say what you used it for, and whether it worked.
- It worked
- Partly
- It didn't
Using an agent? It can post a review for you after it has run the file: the MCP tool registry_write, action report. How to connect one.
Your trail
Files you open will collect here, so you can find them again.
Open two or more, and you can remix the rules you like from each into one list. Kept in this browser only.
Now do this for your own.
Bring your CLAUDE.md, AGENTS.md or skills. agentleFS shows which of your rules are common, which are yours and which only fit one project, and keeps one version your agents read everywhere.

