diff --git a/.vscode/extensions.json b/.vscode/extensions.json
index 5b3f509b4..da9931e31 100644
--- a/.vscode/extensions.json
+++ b/.vscode/extensions.json
@@ -2,9 +2,8 @@
 	"recommendations": [
 		"esbenp.prettier-vscode",
 		"dbaeumer.vscode-eslint",
-		"ban.spellright",
 		"styled-components.vscode-styled-components",
-		"tamasfe.even-better-toml",
-		"mikestead.dotenv"
+		"mikestead.dotenv",
+		"emilerolley.publicodes-language-server"
 	]
 }
diff --git a/exoneration-covid/règles/exonération-covid.yaml b/exoneration-covid/règles/exonération-covid.publicodes
similarity index 100%
rename from exoneration-covid/règles/exonération-covid.yaml
rename to exoneration-covid/règles/exonération-covid.publicodes
diff --git a/modele-social/règles/artiste-auteur.yaml b/modele-social/règles/artiste-auteur.publicodes
similarity index 100%
rename from modele-social/règles/artiste-auteur.yaml
rename to modele-social/règles/artiste-auteur.publicodes
diff --git a/modele-social/règles/base.yaml b/modele-social/règles/base.publicodes
similarity index 100%
rename from modele-social/règles/base.yaml
rename to modele-social/règles/base.publicodes
diff --git a/modele-social/règles/bénéficiaire.yaml b/modele-social/règles/bénéficiaire.publicodes
similarity index 100%
rename from modele-social/règles/bénéficiaire.yaml
rename to modele-social/règles/bénéficiaire.publicodes
diff --git a/modele-social/règles/declarations-indépendant/charges-sociales-formulaire.yaml b/modele-social/règles/declarations-indépendant/charges-sociales-formulaire.publicodes
similarity index 100%
rename from modele-social/règles/declarations-indépendant/charges-sociales-formulaire.yaml
rename to modele-social/règles/declarations-indépendant/charges-sociales-formulaire.publicodes
diff --git a/modele-social/règles/declarations-indépendant/charges-sociales-résultats.yaml b/modele-social/règles/declarations-indépendant/charges-sociales-résultats.publicodes
similarity index 100%
rename from modele-social/règles/declarations-indépendant/charges-sociales-résultats.yaml
rename to modele-social/règles/declarations-indépendant/charges-sociales-résultats.publicodes
diff --git a/modele-social/règles/dirigeant/auto-entrepreneur.yaml b/modele-social/règles/dirigeant/auto-entrepreneur.publicodes
similarity index 100%
rename from modele-social/règles/dirigeant/auto-entrepreneur.yaml
rename to modele-social/règles/dirigeant/auto-entrepreneur.publicodes
diff --git a/modele-social/règles/dirigeant/conjoint-collaborateur.yaml b/modele-social/règles/dirigeant/conjoint-collaborateur.publicodes
similarity index 100%
rename from modele-social/règles/dirigeant/conjoint-collaborateur.yaml
rename to modele-social/règles/dirigeant/conjoint-collaborateur.publicodes
diff --git a/modele-social/règles/dirigeant/dirigeant.yaml b/modele-social/règles/dirigeant/dirigeant.publicodes
similarity index 100%
rename from modele-social/règles/dirigeant/dirigeant.yaml
rename to modele-social/règles/dirigeant/dirigeant.publicodes
diff --git a/modele-social/règles/dirigeant/exonération-covid.yaml b/modele-social/règles/dirigeant/exonération-covid.publicodes
similarity index 100%
rename from modele-social/règles/dirigeant/exonération-covid.yaml
rename to modele-social/règles/dirigeant/exonération-covid.publicodes
diff --git a/modele-social/règles/dirigeant/exonérations.yaml b/modele-social/règles/dirigeant/exonérations.publicodes
similarity index 100%
rename from modele-social/règles/dirigeant/exonérations.yaml
rename to modele-social/règles/dirigeant/exonérations.publicodes
diff --git a/modele-social/règles/dirigeant/indépendant.yaml b/modele-social/règles/dirigeant/indépendant.publicodes
similarity index 100%
rename from modele-social/règles/dirigeant/indépendant.yaml
rename to modele-social/règles/dirigeant/indépendant.publicodes
diff --git a/modele-social/règles/dirigeant/professions-libérales/CARCDSF.yaml b/modele-social/règles/dirigeant/professions-libérales/CARCDSF.publicodes
similarity index 100%
rename from modele-social/règles/dirigeant/professions-libérales/CARCDSF.yaml
rename to modele-social/règles/dirigeant/professions-libérales/CARCDSF.publicodes
diff --git a/modele-social/règles/dirigeant/professions-libérales/CARMF.yaml b/modele-social/règles/dirigeant/professions-libérales/CARMF.publicodes
similarity index 100%
rename from modele-social/règles/dirigeant/professions-libérales/CARMF.yaml
rename to modele-social/règles/dirigeant/professions-libérales/CARMF.publicodes
diff --git a/modele-social/règles/dirigeant/professions-libérales/CARPIMKO.yaml b/modele-social/règles/dirigeant/professions-libérales/CARPIMKO.publicodes
similarity index 100%
rename from modele-social/règles/dirigeant/professions-libérales/CARPIMKO.yaml
rename to modele-social/règles/dirigeant/professions-libérales/CARPIMKO.publicodes
diff --git a/modele-social/règles/dirigeant/professions-libérales/CAVEC.yaml b/modele-social/règles/dirigeant/professions-libérales/CAVEC.publicodes
similarity index 100%
rename from modele-social/règles/dirigeant/professions-libérales/CAVEC.yaml
rename to modele-social/règles/dirigeant/professions-libérales/CAVEC.publicodes
diff --git a/modele-social/règles/dirigeant/professions-libérales/CAVP.yaml b/modele-social/règles/dirigeant/professions-libérales/CAVP.publicodes
similarity index 100%
rename from modele-social/règles/dirigeant/professions-libérales/CAVP.yaml
rename to modele-social/règles/dirigeant/professions-libérales/CAVP.publicodes
diff --git a/modele-social/règles/dirigeant/professions-libérales/CIPAV.yaml b/modele-social/règles/dirigeant/professions-libérales/CIPAV.publicodes
similarity index 100%
rename from modele-social/règles/dirigeant/professions-libérales/CIPAV.yaml
rename to modele-social/règles/dirigeant/professions-libérales/CIPAV.publicodes
diff --git a/modele-social/règles/dirigeant/professions-libérales/CNAVPL.yaml b/modele-social/règles/dirigeant/professions-libérales/CNAVPL.publicodes
similarity index 100%
rename from modele-social/règles/dirigeant/professions-libérales/CNAVPL.yaml
rename to modele-social/règles/dirigeant/professions-libérales/CNAVPL.publicodes
diff --git a/modele-social/règles/dirigeant/professions-libérales/CNBF.yaml b/modele-social/règles/dirigeant/professions-libérales/CNBF.publicodes
similarity index 100%
rename from modele-social/règles/dirigeant/professions-libérales/CNBF.yaml
rename to modele-social/règles/dirigeant/professions-libérales/CNBF.publicodes
diff --git a/modele-social/règles/dirigeant/professions-libérales/PAMC.yaml b/modele-social/règles/dirigeant/professions-libérales/PAMC.publicodes
similarity index 100%
rename from modele-social/règles/dirigeant/professions-libérales/PAMC.yaml
rename to modele-social/règles/dirigeant/professions-libérales/PAMC.publicodes
diff --git a/modele-social/règles/dirigeant/professions-libérales/profession-libérale.yaml b/modele-social/règles/dirigeant/professions-libérales/profession-libérale.publicodes
similarity index 100%
rename from modele-social/règles/dirigeant/professions-libérales/profession-libérale.yaml
rename to modele-social/règles/dirigeant/professions-libérales/profession-libérale.publicodes
diff --git a/modele-social/règles/entreprise/activité.yaml b/modele-social/règles/entreprise/activité.publicodes
similarity index 100%
rename from modele-social/règles/entreprise/activité.yaml
rename to modele-social/règles/entreprise/activité.publicodes
diff --git a/modele-social/règles/entreprise/catégorie-juridique.yaml b/modele-social/règles/entreprise/catégorie-juridique.publicodes
similarity index 100%
rename from modele-social/règles/entreprise/catégorie-juridique.yaml
rename to modele-social/règles/entreprise/catégorie-juridique.publicodes
diff --git a/modele-social/règles/entreprise/coût-création.yaml b/modele-social/règles/entreprise/coût-création.publicodes
similarity index 100%
rename from modele-social/règles/entreprise/coût-création.yaml
rename to modele-social/règles/entreprise/coût-création.publicodes
diff --git a/modele-social/règles/entreprise/entreprise.yaml b/modele-social/règles/entreprise/entreprise.publicodes
similarity index 100%
rename from modele-social/règles/entreprise/entreprise.yaml
rename to modele-social/règles/entreprise/entreprise.publicodes
diff --git a/modele-social/règles/entreprise/imposition.yaml b/modele-social/règles/entreprise/imposition.publicodes
similarity index 100%
rename from modele-social/règles/entreprise/imposition.yaml
rename to modele-social/règles/entreprise/imposition.publicodes
diff --git a/modele-social/règles/entreprise/établissement.yaml b/modele-social/règles/entreprise/établissement.publicodes
similarity index 100%
rename from modele-social/règles/entreprise/établissement.yaml
rename to modele-social/règles/entreprise/établissement.publicodes
diff --git a/modele-social/règles/impôt.yaml b/modele-social/règles/impôt.publicodes
similarity index 100%
rename from modele-social/règles/impôt.yaml
rename to modele-social/règles/impôt.publicodes
diff --git a/modele-social/règles/protection-sociale.yaml b/modele-social/règles/protection-sociale.publicodes
similarity index 100%
rename from modele-social/règles/protection-sociale.yaml
rename to modele-social/règles/protection-sociale.publicodes
diff --git a/modele-social/règles/période.yaml b/modele-social/règles/période.publicodes
similarity index 100%
rename from modele-social/règles/période.yaml
rename to modele-social/règles/période.publicodes
diff --git a/modele-social/règles/salarié/activité-partielle.yaml b/modele-social/règles/salarié/activité-partielle.publicodes
similarity index 100%
rename from modele-social/règles/salarié/activité-partielle.yaml
rename to modele-social/règles/salarié/activité-partielle.publicodes
diff --git a/modele-social/règles/salarié/aides-employeur.yaml b/modele-social/règles/salarié/aides-employeur.publicodes
similarity index 100%
rename from modele-social/règles/salarié/aides-employeur.yaml
rename to modele-social/règles/salarié/aides-employeur.publicodes
diff --git a/modele-social/règles/salarié/contrat.yaml b/modele-social/règles/salarié/contrat.publicodes
similarity index 100%
rename from modele-social/règles/salarié/contrat.yaml
rename to modele-social/règles/salarié/contrat.publicodes
diff --git a/modele-social/règles/salarié/conventions-collectives/bâtiment.yaml b/modele-social/règles/salarié/conventions-collectives/bâtiment.publicodes
similarity index 100%
rename from modele-social/règles/salarié/conventions-collectives/bâtiment.yaml
rename to modele-social/règles/salarié/conventions-collectives/bâtiment.publicodes
diff --git a/modele-social/règles/salarié/conventions-collectives/experts-comptables.yaml b/modele-social/règles/salarié/conventions-collectives/experts-comptables.publicodes
similarity index 100%
rename from modele-social/règles/salarié/conventions-collectives/experts-comptables.yaml
rename to modele-social/règles/salarié/conventions-collectives/experts-comptables.publicodes
diff --git a/modele-social/règles/salarié/conventions-collectives/hôtels-cafés-restaurants.yaml b/modele-social/règles/salarié/conventions-collectives/hôtels-cafés-restaurants.publicodes
similarity index 100%
rename from modele-social/règles/salarié/conventions-collectives/hôtels-cafés-restaurants.yaml
rename to modele-social/règles/salarié/conventions-collectives/hôtels-cafés-restaurants.publicodes
diff --git a/modele-social/règles/salarié/conventions-collectives/optique.yaml b/modele-social/règles/salarié/conventions-collectives/optique.publicodes
similarity index 100%
rename from modele-social/règles/salarié/conventions-collectives/optique.yaml
rename to modele-social/règles/salarié/conventions-collectives/optique.publicodes
diff --git a/modele-social/règles/salarié/conventions-collectives/spectacle-vivant.yaml b/modele-social/règles/salarié/conventions-collectives/spectacle-vivant.publicodes
similarity index 100%
rename from modele-social/règles/salarié/conventions-collectives/spectacle-vivant.yaml
rename to modele-social/règles/salarié/conventions-collectives/spectacle-vivant.publicodes
diff --git a/modele-social/règles/salarié/conventions-collectives/sport.yaml b/modele-social/règles/salarié/conventions-collectives/sport.publicodes
similarity index 100%
rename from modele-social/règles/salarié/conventions-collectives/sport.yaml
rename to modele-social/règles/salarié/conventions-collectives/sport.publicodes
diff --git a/modele-social/règles/salarié/cotisations.yaml b/modele-social/règles/salarié/cotisations.publicodes
similarity index 100%
rename from modele-social/règles/salarié/cotisations.yaml
rename to modele-social/règles/salarié/cotisations.publicodes
diff --git a/modele-social/règles/salarié/rémunération.yaml b/modele-social/règles/salarié/rémunération.publicodes
similarity index 100%
rename from modele-social/règles/salarié/rémunération.yaml
rename to modele-social/règles/salarié/rémunération.publicodes
diff --git a/modele-social/règles/salarié/salarié.yaml b/modele-social/règles/salarié/salarié.publicodes
similarity index 100%
rename from modele-social/règles/salarié/salarié.yaml
rename to modele-social/règles/salarié/salarié.publicodes
diff --git a/modele-social/règles/salarié/temps-de-travail.yaml b/modele-social/règles/salarié/temps-de-travail.publicodes
similarity index 100%
rename from modele-social/règles/salarié/temps-de-travail.yaml
rename to modele-social/règles/salarié/temps-de-travail.publicodes
diff --git a/modele-social/règles/situation-personnelle.yaml b/modele-social/règles/situation-personnelle.publicodes
similarity index 100%
rename from modele-social/règles/situation-personnelle.yaml
rename to modele-social/règles/situation-personnelle.publicodes
diff --git a/scripts/build-rules.js b/scripts/build-rules.js
index 3501a8f15..6b499bdf1 100644
--- a/scripts/build-rules.js
+++ b/scripts/build-rules.js
@@ -1,11 +1,11 @@
-import { writeFileSync } from 'fs'
+import { existsSync, mkdirSync, writeFileSync } from 'fs'
 import path from 'path'
 
 import { getModelFromSource } from '@publicodes/tools/compilation'
 import Engine from 'publicodes'
 
 const outDir = './dist'
-const rules = getModelFromSource(path.resolve('./règles/**/*.yaml'), {
+const rules = getModelFromSource(path.resolve('./règles'), {
 	verbose: true,
 })
 
@@ -13,6 +13,11 @@ export default function writeJSFile() {
 	const json = JSON.stringify(JSON.stringify(rules))
 	const names = Object.keys(new Engine(rules).getParsedRules())
 	const jsString = `export const json = /*@__PURE__*/ ${json};\nexport default /*@__PURE__*/ JSON.parse(json);`
+	// Create folder if doesn't exist
+	const folder = path.resolve(outDir)
+	if (!existsSync(folder)) {
+		mkdirSync(folder)
+	}
 	writeFileSync(path.resolve(outDir, 'index.js'), jsString)
 	writeFileSync(
 		path.resolve(outDir, 'names.ts'),