diff --git a/.gitignore b/.gitignore
index 95d5c9e19..3b7c92072 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 .tags*
 .tmp
+/tmp
 .DS_Store
 yarn-error.log
 package-lock.json
diff --git a/modele-social/.yarnrc b/modele-social/.yarnrc
new file mode 100644
index 000000000..5770a9574
--- /dev/null
+++ b/modele-social/.yarnrc
@@ -0,0 +1,2 @@
+version-tag-prefix modele-social-v
+version-git-message "⬆ Mise à jour du paquet \"modele-social\" vers %s"
diff --git a/systeme-social/CHANGELOG.md b/modele-social/CHANGELOG.md
similarity index 100%
rename from systeme-social/CHANGELOG.md
rename to modele-social/CHANGELOG.md
diff --git a/systeme-social/README.md b/modele-social/README.md
similarity index 87%
rename from systeme-social/README.md
rename to modele-social/README.md
index 8663f4850..e40933de5 100644
--- a/systeme-social/README.md
+++ b/modele-social/README.md
@@ -1,4 +1,4 @@
-# Système social français en publicodes
+# Modèle social français en publicodes
 
 Ce paquet contient les règles publicodes utilisées sur https://mon-entreprise.fr
 pour le calcul des cotisations sociales, des impôts et des droits sociaux.
diff --git a/systeme-social/build.js b/modele-social/build.js
similarity index 100%
rename from systeme-social/build.js
rename to modele-social/build.js
diff --git a/modele-social/index.d.ts b/modele-social/index.d.ts
new file mode 100644
index 000000000..8cb6cf61e
--- /dev/null
+++ b/modele-social/index.d.ts
@@ -0,0 +1,9 @@
+// Currenty we systematically bundle all the rules even if we only need a
+// sub-section of them. We might support "code-splitting" the rules in the
+// future.
+import { Rule } from 'publicodes'
+import { Names } from './dist/names'
+
+export type DottedName = Names
+declare let rules: Record<Names, Rule>
+export default rules
diff --git a/systeme-social/package.json b/modele-social/package.json
similarity index 93%
rename from systeme-social/package.json
rename to modele-social/package.json
index 121a54a43..5db9ab994 100644
--- a/systeme-social/package.json
+++ b/modele-social/package.json
@@ -1,5 +1,5 @@
 {
-	"name": "systeme-social",
+	"name": "modele-social",
 	"version": "0.1.0",
 	"description": "Les règles publicodes du système social français",
 	"main": "./dist/index.js",
@@ -7,7 +7,7 @@
 	"repository": {
 		"type": "git",
 		"url": "https://github.com/betagouv/mon-entreprise.git",
-		"directory": "systeme-social"
+		"directory": "modele-social"
 	},
 	"bugs": "https://github.com/betagouv/mon-entreprise/issues?q=is%3Aopen+is%3Aissue+label%3A%22%F0%9F%93%95+l%C3%A9gislation%22",
 	"homepage": "https://mon-entreprise.fr/int%C3%A9gration/biblioth%C3%A8que-de-calcul",
diff --git a/systeme-social/règles/artiste-auteur.yaml b/modele-social/règles/artiste-auteur.yaml
similarity index 100%
rename from systeme-social/règles/artiste-auteur.yaml
rename to modele-social/règles/artiste-auteur.yaml
diff --git a/systeme-social/règles/base.yaml b/modele-social/règles/base.yaml
similarity index 100%
rename from systeme-social/règles/base.yaml
rename to modele-social/règles/base.yaml
diff --git a/systeme-social/règles/chômage-partiel.yaml b/modele-social/règles/chômage-partiel.yaml
similarity index 100%
rename from systeme-social/règles/chômage-partiel.yaml
rename to modele-social/règles/chômage-partiel.yaml
diff --git a/systeme-social/règles/conventions-collectives/bâtiment.yaml b/modele-social/règles/conventions-collectives/bâtiment.yaml
similarity index 100%
rename from systeme-social/règles/conventions-collectives/bâtiment.yaml
rename to modele-social/règles/conventions-collectives/bâtiment.yaml
diff --git a/systeme-social/règles/conventions-collectives/experts-comptables.yaml b/modele-social/règles/conventions-collectives/experts-comptables.yaml
similarity index 100%
rename from systeme-social/règles/conventions-collectives/experts-comptables.yaml
rename to modele-social/règles/conventions-collectives/experts-comptables.yaml
diff --git a/systeme-social/règles/conventions-collectives/hôtels-cafés-restaurants.yaml b/modele-social/règles/conventions-collectives/hôtels-cafés-restaurants.yaml
similarity index 100%
rename from systeme-social/règles/conventions-collectives/hôtels-cafés-restaurants.yaml
rename to modele-social/règles/conventions-collectives/hôtels-cafés-restaurants.yaml
diff --git a/systeme-social/règles/conventions-collectives/optique.yaml b/modele-social/règles/conventions-collectives/optique.yaml
similarity index 100%
rename from systeme-social/règles/conventions-collectives/optique.yaml
rename to modele-social/règles/conventions-collectives/optique.yaml
diff --git a/systeme-social/règles/conventions-collectives/spectacle-vivant.yaml b/modele-social/règles/conventions-collectives/spectacle-vivant.yaml
similarity index 100%
rename from systeme-social/règles/conventions-collectives/spectacle-vivant.yaml
rename to modele-social/règles/conventions-collectives/spectacle-vivant.yaml
diff --git a/systeme-social/règles/conventions-collectives/sport.yaml b/modele-social/règles/conventions-collectives/sport.yaml
similarity index 100%
rename from systeme-social/règles/conventions-collectives/sport.yaml
rename to modele-social/règles/conventions-collectives/sport.yaml
diff --git a/systeme-social/règles/dirigeant.yaml b/modele-social/règles/dirigeant.yaml
similarity index 100%
rename from systeme-social/règles/dirigeant.yaml
rename to modele-social/règles/dirigeant.yaml
diff --git a/systeme-social/règles/déclaration-revenu-indépendant.yaml b/modele-social/règles/déclaration-revenu-indépendant.yaml
similarity index 100%
rename from systeme-social/règles/déclaration-revenu-indépendant.yaml
rename to modele-social/règles/déclaration-revenu-indépendant.yaml
diff --git a/systeme-social/règles/entreprise-établissement.yaml b/modele-social/règles/entreprise-établissement.yaml
similarity index 100%
rename from systeme-social/règles/entreprise-établissement.yaml
rename to modele-social/règles/entreprise-établissement.yaml
diff --git a/systeme-social/règles/aaa-impôt.yaml b/modele-social/règles/impôt.yaml
similarity index 100%
rename from systeme-social/règles/aaa-impôt.yaml
rename to modele-social/règles/impôt.yaml
diff --git a/systeme-social/règles/profession-libérale.yaml b/modele-social/règles/profession-libérale.yaml
similarity index 100%
rename from systeme-social/règles/profession-libérale.yaml
rename to modele-social/règles/profession-libérale.yaml
diff --git a/systeme-social/règles/protection-sociale.yaml b/modele-social/règles/protection-sociale.yaml
similarity index 100%
rename from systeme-social/règles/protection-sociale.yaml
rename to modele-social/règles/protection-sociale.yaml
diff --git a/systeme-social/règles/salarié.yaml b/modele-social/règles/salarié.yaml
similarity index 100%
rename from systeme-social/règles/salarié.yaml
rename to modele-social/règles/salarié.yaml
diff --git a/systeme-social/règles/situation-personnelle.yaml b/modele-social/règles/situation-personnelle.yaml
similarity index 100%
rename from systeme-social/règles/situation-personnelle.yaml
rename to modele-social/règles/situation-personnelle.yaml
diff --git a/mon-entreprise/package.json b/mon-entreprise/package.json
index a1c05c565..a64f68915 100644
--- a/mon-entreprise/package.json
+++ b/mon-entreprise/package.json
@@ -99,7 +99,7 @@
 		"reselect": "^4.0.0",
 		"styled-components": "^5.1.0",
 		"swr": "^0.1.16",
-		"systeme-social": "^0.1.0",
+		"modele-social": "^0.1.0",
 		"whatwg-fetch": "^3.0.0",
 		"yaml": "^1.9.2"
 	},
diff --git a/mon-entreprise/scripts/i18n/utils.js b/mon-entreprise/scripts/i18n/utils.js
index c1bc1886d..ee3aea7ca 100644
--- a/mon-entreprise/scripts/i18n/utils.js
+++ b/mon-entreprise/scripts/i18n/utils.js
@@ -4,7 +4,7 @@ var fs = require('fs')
 var path = require('path')
 let R = require('ramda')
 var querystring = require('querystring')
-let rules = require('systeme-social')
+let rules = require('modele-social')
 let { parse } = require('yaml')
 
 let rulesTranslationPath = path.resolve('source/locales/rules-en.yaml')
@@ -16,7 +16,7 @@ let attributesToTranslate = [
 	'question',
 	'résumé',
 	'suggestions',
-	'note'
+	'note',
 ]
 
 function getRulesMissingTranslations() {
@@ -30,7 +30,7 @@ function getRulesMissingTranslations() {
 			dottedName,
 			!rule || !rule.titre // && utils.ruleWithDedicatedDocumentationPage(rule))
 				? { ...rule, titre: dottedName.split(' . ').slice(-1)[0] }
-				: rule
+				: rule,
 		])
 		.map(([dottedName, rule]) => ({
 			[dottedName]: R.mergeAll(
@@ -56,13 +56,13 @@ function getRulesMissingTranslations() {
 									return {
 										...acc,
 										[frTrad]: currentTranslation[frTrad],
-										[enTrad]: currentTranslation[enTrad]
+										[enTrad]: currentTranslation[enTrad],
 									}
 								}
 								missingTranslations.push([dottedName, enTrad, suggestion])
 								return {
 									...acc,
-									[frTrad]: suggestion
+									[frTrad]: suggestion,
 								}
 							}, {})
 						}
@@ -76,15 +76,15 @@ function getRulesMissingTranslations() {
 						)
 							return {
 								[enTrad]: currentTranslation[enTrad],
-								[frTrad]: v
+								[frTrad]: v,
 							}
 
 						missingTranslations.push([dottedName, enTrad, v])
 						return {
-							[frTrad]: v
+							[frTrad]: v,
 						}
 					})
-			)
+			),
 		}))
 	resolved = R.mergeAll(resolved)
 	return [missingTranslations, resolved]
@@ -96,7 +96,7 @@ const getUiMissingTranslations = () => {
 	))
 	const translatedKeys = parse(fs.readFileSync(UiTranslationPath, 'utf-8'))
 
-	const missingTranslations = Object.keys(staticKeys).filter(key => {
+	const missingTranslations = Object.keys(staticKeys).filter((key) => {
 		if (key.match(/^\{.*\}$/)) {
 			return false
 		}
@@ -106,7 +106,7 @@ const getUiMissingTranslations = () => {
 	return R.pick(missingTranslations, staticKeys)
 }
 
-const fetchTranslation = async text => {
+const fetchTranslation = async (text) => {
 	console.log(`Fetch translation for:\n\t${text}`)
 	const response = await fetch(
 		`https://api.deepl.com/v2/translate?${querystring.stringify({
@@ -114,7 +114,7 @@ const fetchTranslation = async text => {
 			auth_key: process.env.DEEPL_API_SECRET,
 			tag_handling: 'xml',
 			source_lang: 'FR',
-			target_lang: 'EN'
+			target_lang: 'EN',
 		})}`
 	)
 	const { translations } = await response.json()
@@ -125,5 +125,5 @@ module.exports = {
 	getRulesMissingTranslations,
 	getUiMissingTranslations,
 	rulesTranslationPath,
-	UiTranslationPath
+	UiTranslationPath,
 }
diff --git a/mon-entreprise/source/actions/actions.ts b/mon-entreprise/source/actions/actions.ts
index f291a3b1e..11c49d9ab 100644
--- a/mon-entreprise/source/actions/actions.ts
+++ b/mon-entreprise/source/actions/actions.ts
@@ -2,7 +2,7 @@ import { SitePaths } from 'Components/utils/SitePathsContext'
 import { History } from 'history'
 import { RootState, SimulationConfig } from 'Reducers/rootReducer'
 import { ThunkAction } from 'redux-thunk'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 import { deletePersistedSimulation } from '../storage/persistSimulation'
 import { CompanyStatusAction } from './companyStatusActions'
 
diff --git a/mon-entreprise/source/components/Distribution.tsx b/mon-entreprise/source/components/Distribution.tsx
index 93637452b..c845007c5 100644
--- a/mon-entreprise/source/components/Distribution.tsx
+++ b/mon-entreprise/source/components/Distribution.tsx
@@ -2,7 +2,7 @@ import { EngineContext, useEngine } from 'Components/utils/EngineContext'
 import { max } from 'ramda'
 import { useContext } from 'react'
 import { useSelector } from 'react-redux'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 import { targetUnitSelector } from 'Selectors/simulationSelectors'
 import BarChartBranch from './BarChart'
 import './Distribution.css'
diff --git a/mon-entreprise/source/components/EngineValue.tsx b/mon-entreprise/source/components/EngineValue.tsx
index 7abcae83f..6fd6223a6 100644
--- a/mon-entreprise/source/components/EngineValue.tsx
+++ b/mon-entreprise/source/components/EngineValue.tsx
@@ -1,7 +1,7 @@
 import Engine, { formatValue } from 'publicodes'
 import React, { useContext } from 'react'
 import { useTranslation } from 'react-i18next'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 import { coerceArray } from '../utils'
 import RuleLink from './RuleLink'
 import { EngineContext, useEngine } from './utils/EngineContext'
diff --git a/mon-entreprise/source/components/PaySlip.tsx b/mon-entreprise/source/components/PaySlip.tsx
index 2f0f2ba7d..b06b1f800 100644
--- a/mon-entreprise/source/components/PaySlip.tsx
+++ b/mon-entreprise/source/components/PaySlip.tsx
@@ -10,7 +10,7 @@ import {
 } from 'publicodes'
 import { Fragment, useContext } from 'react'
 import { Trans, useTranslation } from 'react-i18next'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 import './PaySlip.css'
 import { Line, SalaireBrutSection, SalaireNetSection } from './PaySlipSections'
 
diff --git a/mon-entreprise/source/components/PaySlipSections.tsx b/mon-entreprise/source/components/PaySlipSections.tsx
index 7a5876dda..6d375337f 100644
--- a/mon-entreprise/source/components/PaySlipSections.tsx
+++ b/mon-entreprise/source/components/PaySlipSections.tsx
@@ -1,7 +1,7 @@
 import Value, { Condition, ValueProps } from 'Components/EngineValue'
 import RuleLink from 'Components/RuleLink'
 import { Trans } from 'react-i18next'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 
 export const SalaireBrutSection = () => {
 	return (
diff --git a/mon-entreprise/source/components/QuickLinks.tsx b/mon-entreprise/source/components/QuickLinks.tsx
index 18b6c5a4a..f79006a7c 100644
--- a/mon-entreprise/source/components/QuickLinks.tsx
+++ b/mon-entreprise/source/components/QuickLinks.tsx
@@ -3,7 +3,7 @@ import { contains, filter, pipe, reject, toPairs } from 'ramda'
 import { Trans } from 'react-i18next'
 import { useDispatch, useSelector } from 'react-redux'
 import { RootState } from 'Reducers/rootReducer'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 
 import { useNextQuestions } from './utils/useNextQuestion'
 import {
diff --git a/mon-entreprise/source/components/RuleLink.tsx b/mon-entreprise/source/components/RuleLink.tsx
index 05bf95728..8aaea1a73 100644
--- a/mon-entreprise/source/components/RuleLink.tsx
+++ b/mon-entreprise/source/components/RuleLink.tsx
@@ -1,7 +1,7 @@
 import { RuleLink as EngineRuleLink } from 'publicodes'
 import React, { useContext } from 'react'
 import { Link } from 'react-router-dom'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 import { EngineContext } from './utils/EngineContext'
 import { SitePathsContext } from './utils/SitePathsContext'
 
diff --git a/mon-entreprise/source/components/SchemeComparaison.tsx b/mon-entreprise/source/components/SchemeComparaison.tsx
index b8683443d..998f6c639 100644
--- a/mon-entreprise/source/components/SchemeComparaison.tsx
+++ b/mon-entreprise/source/components/SchemeComparaison.tsx
@@ -10,22 +10,15 @@ import Value from 'Components/EngineValue'
 import dirigeantComparaison from '../sites/mon-entreprise.fr/pages/Simulateurs/configs/rémunération-dirigeant.yaml'
 import Engine from 'publicodes'
 import revenusSVG from 'Images/revenus.svg'
-import {
-	default as React,
-	useCallback,
-	useContext,
-	useMemo,
-	useState,
-	useEffect,
-} from 'react'
+import { useCallback, useMemo, useState, useEffect } from 'react'
 import emoji from 'react-easy-emoji'
 import { Trans } from 'react-i18next'
 import { useDispatch, useSelector } from 'react-redux'
 import { situationSelector } from 'Selectors/simulationSelectors'
 import InfoBulle from 'Components/ui/InfoBulle'
 import './SchemeComparaison.css'
-import { EngineContext, useEngine } from './utils/EngineContext'
-import { DottedName } from 'Rules'
+import { useEngine } from './utils/EngineContext'
+import { DottedName } from 'modele-social'
 
 type SchemeComparaisonProps = {
 	hideAutoEntrepreneur?: boolean
diff --git a/mon-entreprise/source/components/SearchBar.tsx b/mon-entreprise/source/components/SearchBar.tsx
index 3489a2644..4c0676965 100644
--- a/mon-entreprise/source/components/SearchBar.tsx
+++ b/mon-entreprise/source/components/SearchBar.tsx
@@ -1,6 +1,6 @@
 import React, { useContext, useEffect, useMemo, useState } from 'react'
 import { Trans, useTranslation } from 'react-i18next'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 import Worker from 'worker-loader!./SearchBar.worker.js'
 import RuleLink from './RuleLink'
 import './SearchBar.css'
diff --git a/mon-entreprise/source/components/StackedBarChart.tsx b/mon-entreprise/source/components/StackedBarChart.tsx
index 62a98475b..6a54e51c2 100644
--- a/mon-entreprise/source/components/StackedBarChart.tsx
+++ b/mon-entreprise/source/components/StackedBarChart.tsx
@@ -3,7 +3,7 @@ import useDisplayOnIntersecting from 'Components/utils/useDisplayOnIntersecting'
 import { EvaluatedNode, EvaluatedRule } from 'publicodes'
 import React from 'react'
 import { animated, useSpring } from 'react-spring'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 import styled from 'styled-components'
 
 const BarStack = styled.div`
diff --git a/mon-entreprise/source/components/TargetSelection.tsx b/mon-entreprise/source/components/TargetSelection.tsx
index 67a2fddbf..429bd1698 100644
--- a/mon-entreprise/source/components/TargetSelection.tsx
+++ b/mon-entreprise/source/components/TargetSelection.tsx
@@ -26,7 +26,7 @@ import { Trans, useTranslation } from 'react-i18next'
 import { useDispatch, useSelector } from 'react-redux'
 import { useLocation } from 'react-router-dom'
 import { RootState } from 'Reducers/rootReducer'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 import { targetUnitSelector } from 'Selectors/simulationSelectors'
 import CurrencyInput from './CurrencyInput/CurrencyInput'
 import './TargetSelection.css'
diff --git a/mon-entreprise/source/components/conversation/AnswerList.tsx b/mon-entreprise/source/components/conversation/AnswerList.tsx
index 8ab39a1e7..a6ec71f3b 100644
--- a/mon-entreprise/source/components/conversation/AnswerList.tsx
+++ b/mon-entreprise/source/components/conversation/AnswerList.tsx
@@ -6,7 +6,7 @@ import { EvaluatedNode, formatValue } from 'publicodes'
 import emoji from 'react-easy-emoji'
 import { Trans, useTranslation } from 'react-i18next'
 import { useDispatch, useSelector } from 'react-redux'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 import { situationSelector } from 'Selectors/simulationSelectors'
 import './AnswerList.css'
 
diff --git a/mon-entreprise/source/components/conversation/Explicable.tsx b/mon-entreprise/source/components/conversation/Explicable.tsx
index 97b9e0d13..9b98afa53 100644
--- a/mon-entreprise/source/components/conversation/Explicable.tsx
+++ b/mon-entreprise/source/components/conversation/Explicable.tsx
@@ -4,7 +4,7 @@ import { EngineContext } from 'Components/utils/EngineContext'
 import React, { useContext, useState } from 'react'
 import emoji from 'react-easy-emoji'
 import { useDispatch } from 'react-redux'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 import { TrackerContext } from '../utils/withTracker'
 import './Explicable.css'
 import usePortal from 'react-useportal'
diff --git a/mon-entreprise/source/components/conversation/RuleInput.tsx b/mon-entreprise/source/components/conversation/RuleInput.tsx
index ba7cb6689..0c3fa6aba 100644
--- a/mon-entreprise/source/components/conversation/RuleInput.tsx
+++ b/mon-entreprise/source/components/conversation/RuleInput.tsx
@@ -17,7 +17,7 @@ import {
 import { Evaluation } from 'publicodes/dist/types/AST/types'
 import React, { useContext } from 'react'
 import { useTranslation } from 'react-i18next'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 import DateInput from './DateInput'
 import ParagrapheInput from './ParagrapheInput'
 import SelectEuropeCountry from './select/SelectEuropeCountry'
diff --git a/mon-entreprise/source/components/simulationExplanation/AidesCovid.tsx b/mon-entreprise/source/components/simulationExplanation/AidesCovid.tsx
index 479e92118..d837bc034 100644
--- a/mon-entreprise/source/components/simulationExplanation/AidesCovid.tsx
+++ b/mon-entreprise/source/components/simulationExplanation/AidesCovid.tsx
@@ -1,7 +1,7 @@
 import Value, { Condition } from 'Components/EngineValue'
 import emoji from 'react-easy-emoji'
 import { Trans } from 'react-i18next'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 
 type AidesCovidProps = {
 	aidesRule?: DottedName
diff --git a/mon-entreprise/source/components/simulationExplanation/IndépendantExplanation.tsx b/mon-entreprise/source/components/simulationExplanation/IndépendantExplanation.tsx
index 8d6b1434c..d4c640fd3 100644
--- a/mon-entreprise/source/components/simulationExplanation/IndépendantExplanation.tsx
+++ b/mon-entreprise/source/components/simulationExplanation/IndépendantExplanation.tsx
@@ -15,7 +15,7 @@ import { max } from 'ramda'
 import { useContext } from 'react'
 import { Trans, useTranslation } from 'react-i18next'
 import { useSelector } from 'react-redux'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 import { targetUnitSelector } from 'Selectors/simulationSelectors'
 import styled from 'styled-components'
 import AidesCovid from './AidesCovid'
diff --git a/mon-entreprise/source/components/simulationExplanation/SalaryExplanation.tsx b/mon-entreprise/source/components/simulationExplanation/SalaryExplanation.tsx
index 3abdfedaa..41bee8f65 100644
--- a/mon-entreprise/source/components/simulationExplanation/SalaryExplanation.tsx
+++ b/mon-entreprise/source/components/simulationExplanation/SalaryExplanation.tsx
@@ -2,11 +2,7 @@ import Distribution from 'Components/Distribution'
 import PaySlip from 'Components/PaySlip'
 import StackedBarChart from 'Components/StackedBarChart'
 import { ThemeColorsContext } from 'Components/utils/colors'
-import {
-	EngineContext,
-	useEngine,
-	useInversionFail,
-} from 'Components/utils/EngineContext'
+import { useEngine, useInversionFail } from 'Components/utils/EngineContext'
 import { useContext, useRef } from 'react'
 import emoji from 'react-easy-emoji'
 import { Trans, useTranslation } from 'react-i18next'
@@ -14,7 +10,7 @@ import { useSelector } from 'react-redux'
 import * as Animate from 'Components/ui/animate'
 import { answeredQuestionsSelector } from 'Selectors/simulationSelectors'
 import { evaluateRule } from 'publicodes'
-import { DottedName } from 'Rules'
+import { DottedName } from 'modele-social'
 
 export default function SalaryExplanation() {
 	const showDistributionFirst = !useSelector(answeredQuestionsSelector).length
diff --git a/mon-entreprise/source/components/utils/EngineContext.tsx b/mon-entreprise/source/components/utils/EngineContext.tsx
index e7e326ecd..41e175fd6 100644
--- a/mon-entreprise/source/components/utils/EngineContext.tsx
+++ b/mon-entreprise/source/components/utils/EngineContext.tsx
@@ -1,6 +1,6 @@
 import Engine from 'publicodes'
 import React, { createContext, useContext } from 'react'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 
 export const EngineContext = createContext<Engine>(new Engine({}))
 export const EngineProvider = EngineContext.Provider
diff --git a/mon-entreprise/source/components/utils/useNextQuestion.tsx b/mon-entreprise/source/components/utils/useNextQuestion.tsx
index b747a0f12..393c3fb9c 100644
--- a/mon-entreprise/source/components/utils/useNextQuestion.tsx
+++ b/mon-entreprise/source/components/utils/useNextQuestion.tsx
@@ -25,7 +25,7 @@ import {
 import { useContext, useMemo } from 'react'
 import { useSelector } from 'react-redux'
 import { Simulation, SimulationConfig } from 'Reducers/rootReducer'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 import {
 	answeredQuestionsSelector,
 	configSelector,
diff --git a/mon-entreprise/source/reducers/rootReducer.ts b/mon-entreprise/source/reducers/rootReducer.ts
index 7ea817dea..94a06bbc6 100644
--- a/mon-entreprise/source/reducers/rootReducer.ts
+++ b/mon-entreprise/source/reducers/rootReducer.ts
@@ -3,7 +3,7 @@ import { defaultTo, omit, without } from 'ramda'
 import reduceReducers from 'reduce-reducers'
 import { combineReducers, Reducer } from 'redux'
 import { SavedSimulation } from 'Selectors/storageSelectors'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 import { objectifsSelector } from '../selectors/simulationSelectors'
 import inFranceAppReducer, { Company } from './inFranceAppReducer'
 import storageRootReducer from './storageReducer'
diff --git a/mon-entreprise/source/selectors/simulationSelectors.ts b/mon-entreprise/source/selectors/simulationSelectors.ts
index 2cbde0d8b..5e4b8c472 100644
--- a/mon-entreprise/source/selectors/simulationSelectors.ts
+++ b/mon-entreprise/source/selectors/simulationSelectors.ts
@@ -1,4 +1,4 @@
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 import { createSelector } from 'reselect'
 import { RootState, SimulationConfig } from 'Reducers/rootReducer'
 
diff --git a/mon-entreprise/source/selectors/storageSelectors.ts b/mon-entreprise/source/selectors/storageSelectors.ts
index 7216471e1..6c912c653 100644
--- a/mon-entreprise/source/selectors/storageSelectors.ts
+++ b/mon-entreprise/source/selectors/storageSelectors.ts
@@ -1,5 +1,5 @@
 import { RootState, Simulation } from 'Reducers/rootReducer'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 
 // Note: it is currently not possible to define SavedSimulation as the return
 // type of the currentSimulationSelector function because the type would then
diff --git a/mon-entreprise/source/server.js b/mon-entreprise/source/server.js
index 932dad33b..11d422e11 100644
--- a/mon-entreprise/source/server.js
+++ b/mon-entreprise/source/server.js
@@ -7,7 +7,7 @@ const config = require('../webpack.dev.js')
 const compiler = webpack(config)
 const history = require('connect-history-api-fallback')
 
-const { watchDottedNames } = require('../../systeme-social/build')
+const { watchDottedNames } = require('../../modele-social/build')
 watchDottedNames()
 
 const rewrite = (basename) => ({
diff --git a/mon-entreprise/source/sites/mon-entreprise.fr/App.tsx b/mon-entreprise/source/sites/mon-entreprise.fr/App.tsx
index e87f7828f..1e35b7ca6 100644
--- a/mon-entreprise/source/sites/mon-entreprise.fr/App.tsx
+++ b/mon-entreprise/source/sites/mon-entreprise.fr/App.tsx
@@ -14,7 +14,7 @@ import { useTranslation } from 'react-i18next'
 import { useSelector } from 'react-redux'
 import { Route, Switch } from 'react-router-dom'
 import createSentryMiddleware from 'redux-sentry-middleware'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 import {
 	configSituationSelector,
 	situationSelector,
diff --git a/mon-entreprise/source/sites/mon-entreprise.fr/entry.en.tsx b/mon-entreprise/source/sites/mon-entreprise.fr/entry.en.tsx
index 527a5b416..4c13e2401 100644
--- a/mon-entreprise/source/sites/mon-entreprise.fr/entry.en.tsx
+++ b/mon-entreprise/source/sites/mon-entreprise.fr/entry.en.tsx
@@ -3,7 +3,7 @@ import { hot } from 'react-hot-loader/root'
 import { translateRules } from 'publicodes'
 import { render } from 'react-dom'
 import 'regenerator-runtime/runtime'
-import rules from 'systeme-social'
+import rules from 'modele-social'
 import i18next from '../../i18n'
 import translations from '../../locales/ui-en.yaml'
 import ruleTranslations from '../../locales/rules-en.yaml'
diff --git a/mon-entreprise/source/sites/mon-entreprise.fr/entry.fr.tsx b/mon-entreprise/source/sites/mon-entreprise.fr/entry.fr.tsx
index 06ef6647c..8767966fd 100644
--- a/mon-entreprise/source/sites/mon-entreprise.fr/entry.fr.tsx
+++ b/mon-entreprise/source/sites/mon-entreprise.fr/entry.fr.tsx
@@ -3,7 +3,7 @@ import 'core-js/stable'
 import 'react-hot-loader'
 import { render } from 'react-dom'
 import 'regenerator-runtime/runtime'
-import rules from 'systeme-social'
+import rules from 'modele-social'
 import App from './App'
 import i18next from '../../i18n'
 
diff --git a/mon-entreprise/source/sites/mon-entreprise.fr/middlewares/trackSimulatorActions.ts b/mon-entreprise/source/sites/mon-entreprise.fr/middlewares/trackSimulatorActions.ts
index af6805e37..df1e9e963 100644
--- a/mon-entreprise/source/sites/mon-entreprise.fr/middlewares/trackSimulatorActions.ts
+++ b/mon-entreprise/source/sites/mon-entreprise.fr/middlewares/trackSimulatorActions.ts
@@ -1,4 +1,4 @@
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 import { situationSelector } from 'Selectors/simulationSelectors'
 import Tracker from 'Tracker'
 
diff --git a/mon-entreprise/source/sites/mon-entreprise.fr/pages/Gérer/AideDéclarationIndépendant/index.tsx b/mon-entreprise/source/sites/mon-entreprise.fr/pages/Gérer/AideDéclarationIndépendant/index.tsx
index f58a8baeb..221053e3b 100644
--- a/mon-entreprise/source/sites/mon-entreprise.fr/pages/Gérer/AideDéclarationIndépendant/index.tsx
+++ b/mon-entreprise/source/sites/mon-entreprise.fr/pages/Gérer/AideDéclarationIndépendant/index.tsx
@@ -17,7 +17,7 @@ import emoji from 'react-easy-emoji'
 import { Trans } from 'react-i18next'
 import { useDispatch, useSelector } from 'react-redux'
 import { RootState } from 'Reducers/rootReducer'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 import { situationSelector } from 'Selectors/simulationSelectors'
 import styled from 'styled-components'
 import { CompanySection } from '../Home'
diff --git a/mon-entreprise/source/sites/mon-entreprise.fr/pages/Simulateurs/ArtisteAuteur.tsx b/mon-entreprise/source/sites/mon-entreprise.fr/pages/Simulateurs/ArtisteAuteur.tsx
index e36b4feff..9323177a9 100644
--- a/mon-entreprise/source/sites/mon-entreprise.fr/pages/Simulateurs/ArtisteAuteur.tsx
+++ b/mon-entreprise/source/sites/mon-entreprise.fr/pages/Simulateurs/ArtisteAuteur.tsx
@@ -12,7 +12,7 @@ import { equals } from 'ramda'
 import { createContext, useContext, useEffect, useState } from 'react'
 import { Trans } from 'react-i18next'
 import { useDispatch, useSelector } from 'react-redux'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 import { situationSelector } from 'Selectors/simulationSelectors'
 import styled from 'styled-components'
 import config from './configs/artiste-auteur.yaml'
diff --git a/mon-entreprise/source/sites/mon-entreprise.fr/pages/Simulateurs/ChômagePartiel.tsx b/mon-entreprise/source/sites/mon-entreprise.fr/pages/Simulateurs/ChômagePartiel.tsx
index a91234c71..3244cce31 100644
--- a/mon-entreprise/source/sites/mon-entreprise.fr/pages/Simulateurs/ChômagePartiel.tsx
+++ b/mon-entreprise/source/sites/mon-entreprise.fr/pages/Simulateurs/ChômagePartiel.tsx
@@ -7,7 +7,7 @@ import { EngineContext, useEngine } from 'Components/utils/EngineContext'
 import { EvaluatedRule, evaluateRule, formatValue } from 'publicodes'
 import React, { useContext, useEffect, useState } from 'react'
 import { useTranslation } from 'react-i18next'
-import { DottedName } from 'systeme-social'
+import { DottedName } from 'modele-social'
 import styled from 'styled-components'
 
 declare global {
diff --git a/mon-entreprise/source/sites/mon-entreprise.fr/pages/integration/Library.tsx b/mon-entreprise/source/sites/mon-entreprise.fr/pages/integration/Library.tsx
index 5eec9ad0a..580afa89d 100644
--- a/mon-entreprise/source/sites/mon-entreprise.fr/pages/integration/Library.tsx
+++ b/mon-entreprise/source/sites/mon-entreprise.fr/pages/integration/Library.tsx
@@ -34,7 +34,7 @@ export default function Library() {
 				</p>
 				<h3>Installation</h3>
 				<pre>
-					<code>npm install --save publicodes systeme-social</code>
+					<code>npm install --save publicodes modele-social</code>
 				</pre>
 				<p>
 					<Emoji emoji="🚧" /> Les dépendances suivantes sont aussi nécessaires
@@ -55,7 +55,7 @@ export default function Library() {
 				<h3>Lancer le calcul</h3>
 				<p>
 					Il ne vous reste plus qu'à paramétrer le moteur avec les règles du
-					paquet `systeme-social` et à appeler la fonction `evaluate` sur la
+					paquet `modele-social` et à appeler la fonction `evaluate` sur la
 					règle que dont vous souhaitez la valeur. Voici un exemple pour le
 					calcul brut / net
 				</p>
diff --git a/mon-entreprise/source/sites/publi.codes/Studio.tsx b/mon-entreprise/source/sites/publi.codes/Studio.tsx
index 0f68e9a9e..864f4891e 100644
--- a/mon-entreprise/source/sites/publi.codes/Studio.tsx
+++ b/mon-entreprise/source/sites/publi.codes/Studio.tsx
@@ -4,7 +4,7 @@ import { invertObj, last } from 'ramda'
 import React, { useCallback, useEffect, useMemo, useState } from 'react'
 import emoji from 'react-easy-emoji'
 import MonacoEditor from 'react-monaco-editor'
-import { useHistory, useLocation, Redirect } from 'react-router-dom'
+import { useHistory, useLocation } from 'react-router-dom'
 import styled from 'styled-components'
 import yaml from 'yaml'
 import { useDebounce } from 'Components/utils'
@@ -14,6 +14,7 @@ const EXAMPLE_CODE = `
 # Pour en savoir plus sur le langage, consultez le tutoriel :
 # => https://publi.codes
 
+prix:
 prix . carottes: 2€/kg
 prix . champignons: 5€/kg
 prix . avocat: 2€/avocat
diff --git a/mon-entreprise/source/utils.ts b/mon-entreprise/source/utils.ts
index 4d44eb1b2..a1d268da1 100644
--- a/mon-entreprise/source/utils.ts
+++ b/mon-entreprise/source/utils.ts
@@ -1,5 +1,4 @@
-import Engine, { ASTNode, EvaluatedNode, formatValue } from 'publicodes'
-import { DottedName } from './rules'
+import { formatValue } from 'publicodes'
 
 export function capitalise0(name: undefined): undefined
 export function capitalise0(name: string): string
diff --git a/mon-entreprise/test/conversation.test.js b/mon-entreprise/test/conversation.test.js
index cfe660b20..6ad0be0bb 100644
--- a/mon-entreprise/test/conversation.test.js
+++ b/mon-entreprise/test/conversation.test.js
@@ -4,7 +4,7 @@ import {
 	getNextQuestions,
 	getNextSteps,
 } from '../source/components/utils/useNextQuestion'
-import rules from 'systeme-social'
+import rules from 'modele-social'
 
 describe('conversation', function () {
 	it('should start with the first missing variable', function () {
diff --git a/mon-entreprise/test/cycles.test.js b/mon-entreprise/test/cycles.test.js
index 2d015b1d1..960fbdcbd 100644
--- a/mon-entreprise/test/cycles.test.js
+++ b/mon-entreprise/test/cycles.test.js
@@ -1,6 +1,6 @@
 import { expect } from 'chai'
 import { cyclesLib } from 'publicodes'
-import rules from 'systeme-social'
+import rules from 'modele-social'
 
 describe('DottedNames graph', () => {
 	it("shouldn't have cycles", () => {
diff --git a/mon-entreprise/test/real-rules.test.js b/mon-entreprise/test/real-rules.test.js
index 999fe1bed..926d2023a 100644
--- a/mon-entreprise/test/real-rules.test.js
+++ b/mon-entreprise/test/real-rules.test.js
@@ -1,7 +1,7 @@
 import { AssertionError } from 'chai'
 import Engine, { parsePublicodes } from 'publicodes'
 import { disambiguateRuleReference } from '../../publicodes/source/ruleUtils'
-import rules from 'systeme-social'
+import rules from 'modele-social'
 
 // les variables dans les tests peuvent être exprimées relativement à l'espace de nom de la règle,
 // comme dans sa formule
diff --git a/mon-entreprise/test/regressions/simulations.jest.js b/mon-entreprise/test/regressions/simulations.jest.js
index 79e189312..aa74a9312 100644
--- a/mon-entreprise/test/regressions/simulations.jest.js
+++ b/mon-entreprise/test/regressions/simulations.jest.js
@@ -7,7 +7,7 @@
 
 /* eslint-disable no-undef */
 import Engine, { evaluateRule } from 'publicodes'
-import rules from 'systeme-social'
+import rules from 'modele-social'
 import artisteAuteurConfig from '../../source/sites/mon-entreprise.fr/pages/Simulateurs/configs/artiste-auteur.yaml'
 import autoentrepreneurConfig from '../../source/sites/mon-entreprise.fr/pages/Simulateurs/configs/auto-entrepreneur.yaml'
 import independantConfig from '../../source/sites/mon-entreprise.fr/pages/Simulateurs/configs/indépendant.yaml'
diff --git a/mon-entreprise/test/unit-translations.test.js b/mon-entreprise/test/unit-translations.test.js
index 264265f26..64bb90e9f 100644
--- a/mon-entreprise/test/unit-translations.test.js
+++ b/mon-entreprise/test/unit-translations.test.js
@@ -1,7 +1,7 @@
 import { expect } from 'chai'
 import { parsePublicodes } from 'publicodes'
 import { uniq } from 'ramda'
-import rawRules from 'systeme-social'
+import rawRules from 'modele-social'
 import unitsTranslations from '../../publicodes/source/locales/units.yaml'
 
 it('use unit that exists in publicode', () => {
diff --git a/package.json b/package.json
index 4dfe8d45a..a1abc0ef3 100644
--- a/package.json
+++ b/package.json
@@ -119,11 +119,11 @@
 		"test:regressions": "jest",
 		"clean": "yarn workspaces run clean",
 		"start": "yarn workspace publicodes build --watch & yarn workspace mon-entreprise start",
-		"syso:up": "yarn workspace systeme-social run up"
+		"moso:up": "yarn workspace modele-social run up"
 	},
 	"workspaces": [
 		"publicodes",
-		"systeme-social",
+		"modele-social",
 		"mon-entreprise"
 	]
 }
diff --git a/systeme-social/.yarnrc b/systeme-social/.yarnrc
deleted file mode 100644
index 8094fc503..000000000
--- a/systeme-social/.yarnrc
+++ /dev/null
@@ -1,2 +0,0 @@
-version-tag-prefix syso-v
-version-git-message "⬆ Mise à jour du paquet \"systeme-social\" vers %s"
diff --git a/systeme-social/index.d.ts b/systeme-social/index.d.ts
deleted file mode 100644
index f20226051..000000000
--- a/systeme-social/index.d.ts
+++ /dev/null
@@ -1,19 +0,0 @@
-// Currenty we systematically bundle all the rules even if we only need a
-// sub-section of them. We might support "code-splitting" the rules in the
-// future.
-import {
-	EvaluatedRule as GenericEvaluatedRule,
-	ParsedRule as GenericParsedRule,
-	ParsedRules as GenericParsedRules,
-	Rules as GenericRules
-} from 'publicodes'
-import { Names } from './dist/names'
-
-export type DottedName = Names
-export type Rules = GenericRules<Names>
-export type ParsedRules = GenericParsedRules<Names>
-export type ParsedRule = GenericParsedRule<Names>
-export type EvaluatedRule = GenericEvaluatedRule<Names>
-export type Situation = Partial<Record<Names, string>>
-declare let rules: Rules
-export default rules
diff --git a/systeme-social/règles/.gitignore b/systeme-social/règles/.gitignore
deleted file mode 100644
index d2785045c..000000000
--- a/systeme-social/règles/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-dottednames.json