diff --git a/.prettierignore b/.prettierignore
index a9ba028ce..62d24c8fa 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -1 +1,2 @@
 .eslintrc.js
+dist
diff --git a/mon-entreprise/package.json b/mon-entreprise/package.json
index ea8aaa597..85e2812e0 100644
--- a/mon-entreprise/package.json
+++ b/mon-entreprise/package.json
@@ -99,6 +99,7 @@
 		"reselect": "^4.0.0",
 		"styled-components": "^5.1.0",
 		"swr": "^0.1.16",
+		"systeme-social": "^1.0.0",
 		"whatwg-fetch": "^3.0.0",
 		"yaml": "^1.9.2"
 	},
diff --git a/mon-entreprise/scripts/dottednames.js b/mon-entreprise/scripts/dottednames.js
deleted file mode 100644
index d5d928803..000000000
--- a/mon-entreprise/scripts/dottednames.js
+++ /dev/null
@@ -1,25 +0,0 @@
-// It is currently not possible to automatically type yaml import with
-// Typescript types, so we manually watch the yaml file containing the rules,
-// convert it to json and persit it on the file system so that we can access the
-// list of dotted names in the Typescript types.
-//
-// A fututre version of typescript may support "plugin" to type files such as
-// yaml.
-
-const fs = require('fs')
-const path = require('path')
-const { readRules } = require('./rules')
-
-const sourceDirPath = path.resolve(__dirname, '../source/rules')
-// Note: we can't put the output file in the fs.watched directory
-const outPath = path.resolve(__dirname, '../source/types/dottednames.json')
-
-function persistJsonFileFromYaml() {
-	const rules = readRules()
-	const jsonString = JSON.stringify(rules, null, 2)
-	fs.writeFileSync(outPath, jsonString)
-}
-
-persistJsonFileFromYaml()
-exports.watchDottedNames = () =>
-	fs.watch(sourceDirPath, persistJsonFileFromYaml)
diff --git a/mon-entreprise/scripts/i18n/utils.js b/mon-entreprise/scripts/i18n/utils.js
index d75d86a42..c1bc1886d 100644
--- a/mon-entreprise/scripts/i18n/utils.js
+++ b/mon-entreprise/scripts/i18n/utils.js
@@ -4,10 +4,9 @@ var fs = require('fs')
 var path = require('path')
 let R = require('ramda')
 var querystring = require('querystring')
-let { readRules } = require('../rules')
-// let { utils } = require('publicodes')
-
+let rules = require('systeme-social')
 let { parse } = require('yaml')
+
 let rulesTranslationPath = path.resolve('source/locales/rules-en.yaml')
 let UiTranslationPath = path.resolve('source/locales/ui-en.yaml')
 
@@ -21,8 +20,6 @@ let attributesToTranslate = [
 ]
 
 function getRulesMissingTranslations() {
-	let rules = readRules()
-
 	let currentExternalization = parse(
 		fs.readFileSync(rulesTranslationPath, 'utf-8')
 	)
diff --git a/mon-entreprise/scripts/prepare.js b/mon-entreprise/scripts/prepare.js
index 307b42c34..ebf6bf168 100644
--- a/mon-entreprise/scripts/prepare.js
+++ b/mon-entreprise/scripts/prepare.js
@@ -1,3 +1,2 @@
-require('./dottednames.js')
 require('./fetch-releases.js')
 require('./fetch-stats.js')
diff --git a/mon-entreprise/scripts/rules.js b/mon-entreprise/scripts/rules.js
deleted file mode 100644
index e61deca19..000000000
--- a/mon-entreprise/scripts/rules.js
+++ /dev/null
@@ -1,28 +0,0 @@
-// In a vanilla NodeJS environment it is not possible to use the "import"
-// statement with the Webpack transformer (from yaml to json).
-
-const fs = require('fs')
-const path = require('path')
-const yaml = require('yaml')
-
-const publicodesDir = path.resolve(__dirname, '../source/rules')
-
-function concatenateFilesInDir(dirPath = publicodesDir) {
-	return fs
-		.readdirSync(dirPath)
-		.map(filename => {
-			const fullpath = path.join(dirPath, filename)
-			if (fs.statSync(fullpath).isDirectory()) {
-				return concatenateFilesInDir(fullpath)
-			} else {
-				return filename.endsWith('.yaml') ? fs.readFileSync(fullpath) : ''
-			}
-		})
-		.reduce((acc, cur) => acc + '\n' + cur, '')
-}
-
-function readRules() {
-	return yaml.parse(concatenateFilesInDir())
-}
-
-exports.readRules = readRules
diff --git a/mon-entreprise/source/actions/actions.ts b/mon-entreprise/source/actions/actions.ts
index f460c9149..f291a3b1e 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 'Rules'
+import { DottedName } from 'systeme-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 54a9cceee..93637452b 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 'Rules'
+import { DottedName } from 'systeme-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 571a4a795..7abcae83f 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 'Rules'
+import { DottedName } from 'systeme-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 654dfad54..2f0f2ba7d 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 'Rules'
+import { DottedName } from 'systeme-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 d72f38768..7a5876dda 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 'Rules'
+import { DottedName } from 'systeme-social'
 
 export const SalaireBrutSection = () => {
 	return (
diff --git a/mon-entreprise/source/components/QuickLinks.tsx b/mon-entreprise/source/components/QuickLinks.tsx
index e63a33903..18b6c5a4a 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 'Rules'
+import { DottedName } from 'systeme-social'
 
 import { useNextQuestions } from './utils/useNextQuestion'
 import {
diff --git a/mon-entreprise/source/components/RuleLink.tsx b/mon-entreprise/source/components/RuleLink.tsx
index 88d297017..05bf95728 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 'Rules'
+import { DottedName } from 'systeme-social'
 import { EngineContext } from './utils/EngineContext'
 import { SitePathsContext } from './utils/SitePathsContext'
 
diff --git a/mon-entreprise/source/components/SearchBar.tsx b/mon-entreprise/source/components/SearchBar.tsx
index c282af22b..3489a2644 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 'Rules'
+import { DottedName } from 'systeme-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 43f28d173..62a98475b 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 'Rules'
+import { DottedName } from 'systeme-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 3006cdb02..67a2fddbf 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 'Rules'
+import { DottedName } from 'systeme-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 752ff16cb..8ab39a1e7 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 'Rules'
+import { DottedName } from 'systeme-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 2a301d240..97b9e0d13 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 'Rules'
+import { DottedName } from 'systeme-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 9a6f1599d..ba7cb6689 100644
--- a/mon-entreprise/source/components/conversation/RuleInput.tsx
+++ b/mon-entreprise/source/components/conversation/RuleInput.tsx
@@ -17,8 +17,7 @@ import {
 import { Evaluation } from 'publicodes/dist/types/AST/types'
 import React, { useContext } from 'react'
 import { useTranslation } from 'react-i18next'
-import { DottedName } from 'Rules'
-import { serialize } from 'storage/serializeSimulation'
+import { DottedName } from 'systeme-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 fa00ce9c8..479e92118 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 'Rules'
+import { DottedName } from 'systeme-social'
 
 type AidesCovidProps = {
 	aidesRule?: DottedName
diff --git a/mon-entreprise/source/components/simulationExplanation/IndépendantExplanation.tsx b/mon-entreprise/source/components/simulationExplanation/IndépendantExplanation.tsx
index 136fbb855..8d6b1434c 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 'Rules'
+import { DottedName } from 'systeme-social'
 import { targetUnitSelector } from 'Selectors/simulationSelectors'
 import styled from 'styled-components'
 import AidesCovid from './AidesCovid'
diff --git a/mon-entreprise/source/components/utils/EngineContext.tsx b/mon-entreprise/source/components/utils/EngineContext.tsx
index 949825dc5..e7e326ecd 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 'Rules'
+import { DottedName } from 'systeme-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 8507bdc4c..b747a0f12 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 'Rules'
+import { DottedName } from 'systeme-social'
 import {
 	answeredQuestionsSelector,
 	configSelector,
diff --git a/mon-entreprise/source/reducers/rootReducer.ts b/mon-entreprise/source/reducers/rootReducer.ts
index a19ddd061..7ea817dea 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 '../rules/index'
+import { DottedName } from 'systeme-social'
 import { objectifsSelector } from '../selectors/simulationSelectors'
 import inFranceAppReducer, { Company } from './inFranceAppReducer'
 import storageRootReducer from './storageReducer'
diff --git a/mon-entreprise/source/rules/index.ts b/mon-entreprise/source/rules/index.ts
deleted file mode 100644
index 8035a053d..000000000
--- a/mon-entreprise/source/rules/index.ts
+++ /dev/null
@@ -1,47 +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 jsonRules from '../types/dottednames.json'
-import artisteAuteur from './artiste-auteur.yaml'
-import base from './base.yaml'
-import chômagePartiel from './chômage-partiel.yaml'
-import CCBatiment from './conventions-collectives/bâtiment.yaml'
-import CCCompta from './conventions-collectives/experts-comptables.yaml'
-import CCHotels from './conventions-collectives/hôtels-cafés-restaurants.yaml'
-import CCOptique from './conventions-collectives/optique.yaml'
-import CCSpectacleVivant from './conventions-collectives/spectacle-vivant.yaml'
-import CCSport from './conventions-collectives/sport.yaml'
-import dirigeant from './dirigeant.yaml'
-import déclarationIndépendant from './déclaration-revenu-indépendant.yaml'
-import entrepriseEtablissement from './entreprise-établissement.yaml'
-import impot from './impôt.yaml'
-import professionLibérale from './profession-libérale.yaml'
-import protectionSociale from './protection-sociale.yaml'
-import salarié from './salarié.yaml'
-import situationPersonnelle from './situation-personnelle.yaml'
-
-export type DottedName = keyof typeof jsonRules
-
-const rules = {
-	...base,
-	// TODO: rule order shouldn't matter but there is a bug if "impot" is after
-	// "dirigeant".
-	...impot,
-	...déclarationIndépendant,
-	...artisteAuteur,
-	...dirigeant,
-	...professionLibérale,
-	...entrepriseEtablissement,
-	...protectionSociale,
-	...salarié,
-	...CCBatiment,
-	...CCHotels,
-	...CCOptique,
-	...CCSpectacleVivant,
-	...CCSport,
-	...CCCompta,
-	...situationPersonnelle,
-	...chômagePartiel,
-}
-
-export default rules
diff --git a/mon-entreprise/source/selectors/simulationSelectors.ts b/mon-entreprise/source/selectors/simulationSelectors.ts
index fbac8c52d..2cbde0d8b 100644
--- a/mon-entreprise/source/selectors/simulationSelectors.ts
+++ b/mon-entreprise/source/selectors/simulationSelectors.ts
@@ -1,4 +1,4 @@
-import { DottedName } from '../rules/index'
+import { DottedName } from 'systeme-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 ad5abc5b1..7216471e1 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 'Rules'
+import { DottedName } from 'systeme-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 94a433dd9..932dad33b 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('../scripts/dottednames')
+const { watchDottedNames } = require('../../systeme-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 d795b4df9..e87f7828f 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 'Rules'
+import { DottedName } from 'systeme-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 a4bf5b8b1..527a5b416 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 'Rules'
+import rules from 'systeme-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 aafc1f0e7..06ef6647c 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 'Rules'
+import rules from 'systeme-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 447a25d71..af6805e37 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 'Rules'
+import { DottedName } from 'systeme-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 8e059c8c4..f58a8baeb 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 'Rules'
+import { DottedName } from 'systeme-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 5d6e149c2..e36b4feff 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 'Rules'
+import { DottedName } from 'systeme-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 bb7597539..a91234c71 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 'Rules'
+import { DottedName } from 'systeme-social'
 import styled from 'styled-components'
 
 declare global {
diff --git a/mon-entreprise/source/sites/publi.codes/Studio.tsx b/mon-entreprise/source/sites/publi.codes/Studio.tsx
index c62e55a2c..0f68e9a9e 100644
--- a/mon-entreprise/source/sites/publi.codes/Studio.tsx
+++ b/mon-entreprise/source/sites/publi.codes/Studio.tsx
@@ -14,7 +14,6 @@ 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/test/conversation.test.js b/mon-entreprise/test/conversation.test.js
index f426c957c..cfe660b20 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 '../source/rules'
+import rules from 'systeme-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 90fcf68d4..2d015b1d1 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 '../source/rules'
+import rules from 'systeme-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 6b46afdaa..999fe1bed 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 'Rules'
+import rules from 'systeme-social'
 
 // les variables dans les tests peuvent être exprimées relativement à l'espace de nom de la règle,
 // comme dans sa formule
@@ -46,7 +46,7 @@ describe('Tests des règles de notre base de règles', () =>
 					if (!example.ok) {
 						throw new AssertionError(`
 						Valeur attendue : ${example['valeur attendue']}
-						Valeur obtenue : ${example.rule.nodeValue} 
+						Valeur obtenue : ${example.rule.nodeValue}
 						${
 							example.rule.nodeValue === null
 								? 'Variables manquantes : ' +
diff --git a/mon-entreprise/test/regressions/simulations.jest.js b/mon-entreprise/test/regressions/simulations.jest.js
index fc62c0ed6..79e189312 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 '../../source/rules'
+import rules from 'systeme-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 5379665a5..264265f26 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 '../source/rules'
+import rawRules from 'systeme-social'
 import unitsTranslations from '../../publicodes/source/locales/units.yaml'
 
 it('use unit that exists in publicode', () => {
diff --git a/mon-entreprise/tsconfig.json b/mon-entreprise/tsconfig.json
index add7b0cb4..53dce93c1 100644
--- a/mon-entreprise/tsconfig.json
+++ b/mon-entreprise/tsconfig.json
@@ -8,8 +8,6 @@
 			"Components/*": ["components/*"],
 			"Images/*": ["images/*"],
 			"Reducers/*": ["reducers/*"],
-			"Rules/*": ["rules/*"],
-			"Rules": ["rules"],
 			"Selectors/*": ["selectors/*"],
 			"Types/*": ["types/*"]
 		},
diff --git a/package.json b/package.json
index 6af0698b2..59593154b 100644
--- a/package.json
+++ b/package.json
@@ -109,19 +109,20 @@
 		"lint:eslintrc": "eslint --print-config .eslintrc.js | eslint-config-prettier-check",
 		"lint:eslint": "export NODE_OPTIONS='--max-old-space-size=4096'; eslint . --ext .js,.jsx,.ts,.tsx",
 		"lint:eslint:fix": "yarn lint:eslint --fix",
-		"lint:prettier": "yarn workspaces run prettier --check \"{source,test,cypress}/**/*.{js,jsx,ts,tsx}\"",
+		"lint:prettier": "yarn run prettier --check \"**/*.{js,jsx,ts,tsx}\"",
 		"lint:prettier:fix": "yarn lint:prettier --write",
 		"lint:fix": "yarn lint:eslint:fix && yarn lint:prettier:fix",
 		"prepare": "if [ -z \"$NETLIFY\" ]; then yarn workspaces run prepare; fi",
 		"lint": "yarn lint:eslintrc && yarn lint:eslint && yarn lint:prettier",
 		"test": "yarn workspaces run test",
-		"test:type": "yarn workspaces run tsc",
+		"test:type": "yarn workspace publicodes run tsc && yarn workspace mon-entreprise run tsc",
 		"test:regressions": "jest",
 		"clean": "yarn workspaces run clean",
 		"start": "yarn workspace publicodes build --watch & yarn workspace mon-entreprise start"
 	},
 	"workspaces": [
 		"publicodes",
+		"systeme-social",
 		"mon-entreprise"
 	]
 }
diff --git a/systeme-social/CHANGELOG.md b/systeme-social/CHANGELOG.md
new file mode 100644
index 000000000..e69de29bb
diff --git a/systeme-social/README.md b/systeme-social/README.md
new file mode 100644
index 000000000..8663f4850
--- /dev/null
+++ b/systeme-social/README.md
@@ -0,0 +1,6 @@
+# Système 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.
+
+Pour voir des exemples d'utilisation rendez-vous sur https://mon-entreprise.fr/int%C3%A9gration/biblioth%C3%A8que-de-calcul
diff --git a/systeme-social/build.js b/systeme-social/build.js
new file mode 100644
index 000000000..c7595cfd7
--- /dev/null
+++ b/systeme-social/build.js
@@ -0,0 +1,46 @@
+/* eslint-env node */
+
+const fs = require('fs')
+const path = require('path')
+const yaml = require('yaml')
+
+const publicodesDir = path.resolve(__dirname, './règles')
+const outDir = path.resolve(__dirname, './dist')
+
+if (!fs.existsSync(outDir)) {
+	fs.mkdirSync(outDir)
+}
+
+function concatenateFilesInDir(dirPath = publicodesDir) {
+	return fs
+		.readdirSync(dirPath)
+		.map((filename) => {
+			const fullpath = path.join(dirPath, filename)
+			if (fs.statSync(fullpath).isDirectory()) {
+				return concatenateFilesInDir(fullpath)
+			} else {
+				return filename.endsWith('.yaml') ? fs.readFileSync(fullpath) : ''
+			}
+		})
+		.reduce((acc, cur) => acc + '\n' + cur, '')
+}
+
+function readRules() {
+	return yaml.parse(concatenateFilesInDir())
+}
+
+// Note: we can't put the output file in the fs.watched directory
+
+function writeJSFile() {
+	const rules = readRules()
+	const names = Object.keys(rules)
+	const jsString = `module.exports = ${JSON.stringify(rules, null, 2)}`
+	fs.writeFileSync(path.resolve(outDir, 'index.js'), jsString)
+	fs.writeFileSync(
+		path.resolve(outDir, 'names.ts'),
+		`\nexport type Names = ${names.map((name) => `"${name}"`).join('\n  | ')}\n`
+	)
+}
+
+writeJSFile()
+exports.watchDottedNames = () => fs.watch(publicodesDir, writeJSFile)
diff --git a/systeme-social/index.d.ts b/systeme-social/index.d.ts
new file mode 100644
index 000000000..f20226051
--- /dev/null
+++ b/systeme-social/index.d.ts
@@ -0,0 +1,19 @@
+// 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/package.json b/systeme-social/package.json
new file mode 100644
index 000000000..13157fb6b
--- /dev/null
+++ b/systeme-social/package.json
@@ -0,0 +1,31 @@
+{
+	"name": "systeme-social",
+	"version": "1.0.0",
+	"description": "Les règles publicodes du système social français",
+	"main": "./dist/index.js",
+	"types": "./index.d.ts",
+	"repository": {
+		"type": "git",
+		"url": "https://github.com/betagouv/mon-entreprise.git",
+		"directory": "systeme-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",
+	"license": "MIT",
+	"files": [
+		"dist/index.js"
+	],
+	"devDependencies": {
+		"yaml": "^1.10.0",
+		"publicodes": "^1.0.0-beta.4"
+	},
+	"dependencies": {},
+	"peerDependencies": {
+		"publicodes": "^1.0.0-beta.4"
+	},
+	"scripts": {
+		"build": "node build.js",
+		"prepare": "yarn run build",
+		"test": "echo 1"
+	}
+}
diff --git a/mon-entreprise/source/rules/.gitignore b/systeme-social/règles/.gitignore
similarity index 100%
rename from mon-entreprise/source/rules/.gitignore
rename to systeme-social/règles/.gitignore
diff --git a/mon-entreprise/source/rules/impôt.yaml b/systeme-social/règles/aaa-impôt.yaml
similarity index 100%
rename from mon-entreprise/source/rules/impôt.yaml
rename to systeme-social/règles/aaa-impôt.yaml
diff --git a/mon-entreprise/source/rules/artiste-auteur.yaml b/systeme-social/règles/artiste-auteur.yaml
similarity index 100%
rename from mon-entreprise/source/rules/artiste-auteur.yaml
rename to systeme-social/règles/artiste-auteur.yaml
diff --git a/mon-entreprise/source/rules/base.yaml b/systeme-social/règles/base.yaml
similarity index 100%
rename from mon-entreprise/source/rules/base.yaml
rename to systeme-social/règles/base.yaml
diff --git a/mon-entreprise/source/rules/chômage-partiel.yaml b/systeme-social/règles/chômage-partiel.yaml
similarity index 100%
rename from mon-entreprise/source/rules/chômage-partiel.yaml
rename to systeme-social/règles/chômage-partiel.yaml
diff --git a/mon-entreprise/source/rules/conventions-collectives/bâtiment.yaml b/systeme-social/règles/conventions-collectives/bâtiment.yaml
similarity index 100%
rename from mon-entreprise/source/rules/conventions-collectives/bâtiment.yaml
rename to systeme-social/règles/conventions-collectives/bâtiment.yaml
diff --git a/mon-entreprise/source/rules/conventions-collectives/experts-comptables.yaml b/systeme-social/règles/conventions-collectives/experts-comptables.yaml
similarity index 100%
rename from mon-entreprise/source/rules/conventions-collectives/experts-comptables.yaml
rename to systeme-social/règles/conventions-collectives/experts-comptables.yaml
diff --git a/mon-entreprise/source/rules/conventions-collectives/hôtels-cafés-restaurants.yaml b/systeme-social/règles/conventions-collectives/hôtels-cafés-restaurants.yaml
similarity index 100%
rename from mon-entreprise/source/rules/conventions-collectives/hôtels-cafés-restaurants.yaml
rename to systeme-social/règles/conventions-collectives/hôtels-cafés-restaurants.yaml
diff --git a/mon-entreprise/source/rules/conventions-collectives/optique.yaml b/systeme-social/règles/conventions-collectives/optique.yaml
similarity index 100%
rename from mon-entreprise/source/rules/conventions-collectives/optique.yaml
rename to systeme-social/règles/conventions-collectives/optique.yaml
diff --git a/mon-entreprise/source/rules/conventions-collectives/spectacle-vivant.yaml b/systeme-social/règles/conventions-collectives/spectacle-vivant.yaml
similarity index 100%
rename from mon-entreprise/source/rules/conventions-collectives/spectacle-vivant.yaml
rename to systeme-social/règles/conventions-collectives/spectacle-vivant.yaml
diff --git a/mon-entreprise/source/rules/conventions-collectives/sport.yaml b/systeme-social/règles/conventions-collectives/sport.yaml
similarity index 100%
rename from mon-entreprise/source/rules/conventions-collectives/sport.yaml
rename to systeme-social/règles/conventions-collectives/sport.yaml
diff --git a/mon-entreprise/source/rules/dirigeant.yaml b/systeme-social/règles/dirigeant.yaml
similarity index 100%
rename from mon-entreprise/source/rules/dirigeant.yaml
rename to systeme-social/règles/dirigeant.yaml
diff --git a/mon-entreprise/source/rules/déclaration-revenu-indépendant.yaml b/systeme-social/règles/déclaration-revenu-indépendant.yaml
similarity index 100%
rename from mon-entreprise/source/rules/déclaration-revenu-indépendant.yaml
rename to systeme-social/règles/déclaration-revenu-indépendant.yaml
diff --git a/mon-entreprise/source/rules/entreprise-établissement.yaml b/systeme-social/règles/entreprise-établissement.yaml
similarity index 100%
rename from mon-entreprise/source/rules/entreprise-établissement.yaml
rename to systeme-social/règles/entreprise-établissement.yaml
diff --git a/mon-entreprise/source/rules/profession-libérale.yaml b/systeme-social/règles/profession-libérale.yaml
similarity index 100%
rename from mon-entreprise/source/rules/profession-libérale.yaml
rename to systeme-social/règles/profession-libérale.yaml
diff --git a/mon-entreprise/source/rules/protection-sociale.yaml b/systeme-social/règles/protection-sociale.yaml
similarity index 100%
rename from mon-entreprise/source/rules/protection-sociale.yaml
rename to systeme-social/règles/protection-sociale.yaml
diff --git a/mon-entreprise/source/rules/salarié.yaml b/systeme-social/règles/salarié.yaml
similarity index 100%
rename from mon-entreprise/source/rules/salarié.yaml
rename to systeme-social/règles/salarié.yaml
diff --git a/mon-entreprise/source/rules/situation-personnelle.yaml b/systeme-social/règles/situation-personnelle.yaml
similarity index 100%
rename from mon-entreprise/source/rules/situation-personnelle.yaml
rename to systeme-social/règles/situation-personnelle.yaml
diff --git a/yarn.lock b/yarn.lock
index 348e8fafa..80c0f30a3 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -14119,7 +14119,7 @@ yaml-loader@^0.5.0:
   dependencies:
     js-yaml "^3.5.2"
 
-yaml@^1.9.2:
+yaml@^1.10.0, yaml@^1.9.2:
   version "1.10.0"
   resolved "https://registry.yarnpkg.com/yaml/-/yaml-1.10.0.tgz#3b593add944876077d4d683fee01081bd9fff31e"
   integrity sha512-yr2icI4glYaNG+KWONODapy2/jDdMSDnrONSjblABjD9B4Z5LgiircSt8m8sRZFNi08kG9Sm0uSHtEmP3zaEGg==