# Add Language Generator

> How to add a new target language to Alef-based e2e test generation — generator wiring, output layout, and registration. Load when extending e2e generation to a new language binding.

- Skill: `kreuzberg-dev/add-language-generator` (Agent Skill)
- Install (CLI): `npx skillmds@latest add kreuzberg-dev/add-language-generator`
- Raw SKILL.md: https://api.skillmd.com/api/skills/kreuzberg-dev/add-language-generator/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: kreuzberg-dev (https://skillmd.com/u/kreuzberg-dev)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/kreuzberg-dev/add-language-generator

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# Add Language Generator

E2E test generation is handled by [Alef](https://github.com/xberg-io/alef). To add a new language:

## Steps

1. **Add language to `alef.toml`**: Configure the new language under `[e2e.languages.<lang>]` with appropriate test framework, file extensions, and assertion patterns.
1. **Add call overrides**: If the language needs special call syntax, add `[e2e.call.<call_name>.languages.<lang>]` overrides.
1. **Generate and test**: Run `task e2e:generate` then `task e2e:test` to verify the generated tests compile and pass.
1. **Update CI matrix**: Add the new language to the e2e test CI workflow.

## Checklist

- [ ] Language configured in `alef.toml` `[e2e]` section
- [ ] Generated tests use language-idiomatic assertion patterns
- [ ] Skip conditions translate to language-native skip annotations
- [ ] CI runs generated tests on all supported platforms