diff --git a/src/main/index.ts b/src/main/index.ts
index 67d20a6..7ded7dc 100644
--- a/src/main/index.ts
+++ b/src/main/index.ts
@@ -2,6 +2,7 @@
 import { join } from 'node:path'
 import { app, BrowserWindow } from 'electron'
 import { emit, handle, registerCore } from './ipc'
+import { registerLibrary } from './library'
 import { initLog, log } from './log'
 import { Store } from './store'
 import { registerThemeScheme, Themes } from './themes'
@@ -56,19 +57,22 @@ app.on('second-instance', () => {
 })
 
 app.whenReady().then(() => {
-  registerCore({
+  const ctx = {
     store,
     dataDir,
     win: () => win,
-    onSettings: (s, before) => {
+    onSettings: (s: typeof store.settings, before: typeof store.settings) => {
       if (win && s.fullscreen !== before.fullscreen) win.setFullScreen(s.fullscreen)
     }
-  })
+  }
+  registerCore(ctx)
+  const library = registerLibrary(ctx)
   themes.registerProtocol()
   handle('themes:list', async () => themes.list())
   themes.watch((id) => emit(win, 'themes:changed', { id, themes: themes.list() }))
   win = createWindow()
   L.info('démarrage', app.getVersion())
+  win.webContents.once('did-finish-load', () => library.rescan()) // scan au démarrage, l'interface affiche déjà la bibliothèque connue
 })
 
 app.on('before-quit', () => store.flush())
diff --git a/src/main/ipc.ts b/src/main/ipc.ts
index 92e3f90..6bc6e0f 100644
--- a/src/main/ipc.ts
+++ b/src/main/ipc.ts
@@ -49,7 +49,10 @@ export function registerCore(ctx: Ctx): void {
   handle('library:update', async (id, patch) => {
     const g = store.games.get(str(id, 300, 'id'))
     if (!g) throw new Error('jeu introuvable')
-    Object.assign(g, gamePatch(patch))
+    const p = gamePatch(patch)
+    if (p.name !== undefined && p.name !== g.name) g.nameLocked = true
+    if (p.args !== undefined || p.workDir !== undefined) g.argsLocked = true
+    Object.assign(g, p)
     changed()
     return g
   })
diff --git a/src/main/library.ts b/src/main/library.ts
new file mode 100644
index 0000000..a658a13
--- /dev/null
+++ b/src/main/library.ts
@@ -0,0 +1,68 @@
+/* Bibliothèque : scan, ajout manuel, suppression, explorateur de fichiers pour la manette. */
+import { randomUUID } from 'node:crypto'
+import { readdirSync, statSync } from 'node:fs'
+import { dirname, join, parse } from 'node:path'
+import type { FsFilter, FsListing, ScanReport } from '../shared/ipc'
+import { emit, handle, type Ctx } from './ipc'
+import { log } from './log'
+import { gameId, mergeScan } from './scanners/merge'
+import { runScanners } from './scanners'
+import { manualInput, str } from './validate'
+
+const L = log('library')
+const EXT: Record<FsFilter, RegExp> = { exe: /\.(exe|bat|cmd|lnk|url)$/i, image: /\.(png|jpe?g|webp|gif)$/i, dir: /^$/ }
+
+export function listDir(dir: string, filter: FsFilter): FsListing {
+  if (!dir) {
+    // racine : lecteurs disponibles (Windows) ou / ailleurs
+    if (process.platform !== 'win32') return listDir('/', filter)
+    const drives = 'CDEFGHIJKLMNOPQRSTUVWXYZ'.split('').map((d) => d + ':\\').filter((d) => { try { statSync(d); return true } catch { return false } })
+    return { dir: '', parent: null, entries: drives.map((d) => ({ name: d, path: d, dir: true })) }
+  }
+  const entries = readdirSync(dir, { withFileTypes: true })
+    .filter((e) => !e.name.startsWith('.') && !e.name.startsWith('$') && (e.isDirectory() || EXT[filter].test(e.name)))
+    .map((e) => ({ name: e.name, path: join(dir, e.name), dir: e.isDirectory() }))
+    .sort((a, b) => Number(b.dir) - Number(a.dir) || a.name.localeCompare(b.name, 'fr', { sensitivity: 'base' }))
+  const root = parse(dir).root
+  return { dir, parent: dir === root ? '' : dirname(dir), entries: entries.slice(0, 2000) }
+}
+
+export function registerLibrary(ctx: Ctx): { rescan: () => Promise<ScanReport> } {
+  const { store } = ctx
+  let running: Promise<ScanReport> | null = null
+
+  const rescan = () =>
+    (running ??= (async () => {
+      emit(ctx.win(), 'scan:state', { running: true })
+      const res = await runScanners(store.settings)
+      const { games, stats } = mergeScan(store.list(), res)
+      store.games = new Map(games.map((g) => [g.id, g]))
+      store.save()
+      const report = { ...stats, failed: res.failed, total: games.length }
+      L.info('scan terminé', report)
+      emit(ctx.win(), 'library:changed', store.list())
+      emit(ctx.win(), 'scan:state', { running: false, report })
+      return report
+    })().finally(() => { running = null }))
+
+  handle('library:rescan', rescan)
+  handle('library:addManual', async (input) => {
+    const m = manualInput(input)
+    const g = { id: gameId({ platform: 'manual', platformId: randomUUID() }), platform: 'manual' as const, platformId: '', ...m, installDir: dirname(m.exe), installed: true, favorite: false, hidden: false, addedAt: Date.now(), playtime: 0, collections: [], media: {}, nameLocked: true, argsLocked: true }
+    g.platformId = g.id.slice('manual:'.length)
+    store.games.set(g.id, g)
+    store.save()
+    emit(ctx.win(), 'library:changed', store.list())
+    return g
+  })
+  handle('library:remove', async (id) => {
+    const g = store.games.get(str(id, 300, 'id'))
+    if (!g) return
+    if (g.platform === 'manual') store.games.delete(g.id)
+    else g.hidden = true // un jeu détecté reviendrait au prochain scan : on le masque
+    store.save()
+    emit(ctx.win(), 'library:changed', store.list())
+  })
+  handle('fs:list', async (dir, filter) => listDir(str(dir, 1000, 'dossier'), filter in EXT ? filter : 'exe'))
+  return { rescan }
+}
diff --git a/src/main/scanners/ea.ts b/src/main/scanners/ea.ts
new file mode 100644
index 0000000..d882f03
--- /dev/null
+++ b/src/main/scanners/ea.ts
@@ -0,0 +1,36 @@
+/* EA app (et anciens jeux Origin) : dossiers d'installation dans le registre ; l'exe vient de
+   __Installer\installerdata.xml (<filePath>[clé]\jeu.exe</filePath>). Lancement direct : l'EA app prend le relais pour les DRM. */
+import { win32 as path } from 'node:path'
+import { children } from './reg'
+import type { Scanner, ScanEnv, ScannedGame } from './types'
+
+export const EA_KEYS = ['HKEY_LOCAL_MACHINE\\SOFTWARE\\WOW6432Node\\EA Games', 'HKEY_LOCAL_MACHINE\\SOFTWARE\\WOW6432Node\\Origin Games']
+
+/* Exécutable et titre dans installerdata.xml */
+export function parseInstallerData(xml: string): { exe?: string; title?: string; id?: string } {
+  const fp = xml.match(/<runtime>[\s\S]*?<filePath>([^<]+)<\/filePath>/i)?.[1]
+  const exe = fp?.replace(/^\[[^\]]*\]/, '').replace(/^[\\/]+/, '').trim()
+  // titre anglais en priorité : c'est sous ce nom que les jaquettes sont trouvées
+  const title = xml.match(/<gameTitle[^>]*locale="en_US"[^>]*>([^<]+)</i)?.[1] ?? xml.match(/<gameTitle[^>]*>([^<]+)</i)?.[1]
+  const id = xml.match(/<contentID>([^<]+)<\/contentID>/i)?.[1]
+  return { exe: exe || undefined, title: title?.trim(), id: id?.trim() }
+}
+
+export async function eaGames(env: ScanEnv): Promise<ScannedGame[]> {
+  const out: ScannedGame[] = []
+  for (const key of EA_KEYS) {
+    for (const [sub, v] of children(await env.reg(key), key)) {
+      const dir = v['Install Dir'] ?? v.InstallDir
+      if (!dir) continue
+      const base = path.normalize(dir)
+      const xml = path.join(base, '__Installer', 'installerdata.xml')
+      const info = env.exists(xml) ? parseInstallerData(env.readText(xml)) : {}
+      const exe = info.exe ? path.join(base, info.exe) : undefined
+      if (!exe || !env.exists(exe)) continue // sans exe fiable on ne propose pas le jeu
+      out.push({ platform: 'ea', platformId: info.id ?? sub, name: v.DisplayName ?? info.title ?? sub, installDir: base, exe, workDir: path.dirname(exe), installed: true })
+    }
+  }
+  return out
+}
+
+export const ea: Scanner = { id: 'ea', name: 'EA app', scan: eaGames }
diff --git a/src/main/scanners/epic.ts b/src/main/scanners/epic.ts
new file mode 100644
index 0000000..c96d28e
--- /dev/null
+++ b/src/main/scanners/epic.ts
@@ -0,0 +1,54 @@
+/* Epic Games : manifestes JSON *.item dans ProgramData, lancement par le protocole du launcher Epic. */
+import { win32 as path } from 'node:path'
+import type { Scanner, ScannedGame } from './types'
+
+interface EpicItem {
+  DisplayName?: string
+  InstallLocation?: string
+  LaunchExecutable?: string
+  LaunchCommand?: string
+  CatalogNamespace?: string
+  CatalogItemId?: string
+  AppName?: string
+  MainGameAppName?: string
+  bIsIncompleteInstall?: boolean
+  bIsApplication?: boolean
+  AppCategories?: string[]
+}
+
+export function parseEpicItem(json: string): ScannedGame | null {
+  const it = JSON.parse(json) as EpicItem
+  if (!it.AppName || !it.DisplayName || !it.CatalogNamespace || !it.CatalogItemId) return null
+  if (it.MainGameAppName && it.MainGameAppName !== it.AppName) return null // DLC
+  const cats = it.AppCategories ?? []
+  if (cats.length && !cats.includes('games')) return null // Unreal Engine, plugins…
+  const id = `${it.CatalogNamespace}:${it.CatalogItemId}:${it.AppName}`
+  return {
+    platform: 'epic',
+    platformId: it.AppName,
+    name: it.DisplayName,
+    installDir: it.InstallLocation ? path.normalize(it.InstallLocation) : undefined,
+    exe: it.InstallLocation && it.LaunchExecutable ? path.join(it.InstallLocation, it.LaunchExecutable) : undefined,
+    launchUri: `com.epicgames.launcher://apps/${encodeURIComponent(id)}?action=launch&silent=true`,
+    installed: !it.bIsIncompleteInstall
+  }
+}
+
+export const epic: Scanner = {
+  id: 'epic',
+  name: 'Epic Games',
+  async scan(env) {
+    const dir = path.join(env.programData, 'Epic', 'EpicGamesLauncher', 'Data', 'Manifests')
+    const out: ScannedGame[] = []
+    for (const f of env.list(dir)) {
+      if (!f.toLowerCase().endsWith('.item')) continue
+      try {
+        const g = parseEpicItem(env.readText(path.join(dir, f)))
+        if (g) out.push(g)
+      } catch {
+        /* manifeste illisible : on passe au suivant */
+      }
+    }
+    return out
+  }
+}
diff --git a/src/main/scanners/gog.ts b/src/main/scanners/gog.ts
new file mode 100644
index 0000000..4b48ea6
--- /dev/null
+++ b/src/main/scanners/gog.ts
@@ -0,0 +1,34 @@
+/* GOG Galaxy : une sous-clé de registre par jeu, lancement direct de l'exe (Galaxy pas nécessaire). */
+import { win32 as path } from 'node:path'
+import { children } from './reg'
+import type { Scanner, ScannedGame } from './types'
+
+export const GOG_KEY = 'HKEY_LOCAL_MACHINE\\SOFTWARE\\WOW6432Node\\GOG.com\\Games'
+
+export function gogFromReg(map: Map<string, Record<string, string>>): ScannedGame[] {
+  const out: ScannedGame[] = []
+  for (const [id, v] of children(map, GOG_KEY)) {
+    if (v.dependsOn) continue // DLC
+    const name = v.gameName ?? v.GAMENAME, exe = v.exe ?? v.EXE, dir = v.path ?? v.PATH
+    if (!name || !exe) continue
+    out.push({
+      platform: 'gog',
+      platformId: v.gameID ?? id,
+      name,
+      installDir: dir ? path.normalize(dir) : path.dirname(exe),
+      exe: path.normalize(exe),
+      args: v.launchParam || undefined,
+      workDir: v.workingDir ? path.normalize(v.workingDir) : undefined,
+      installed: true
+    })
+  }
+  return out
+}
+
+export const gog: Scanner = {
+  id: 'gog',
+  name: 'GOG Galaxy',
+  async scan(env) {
+    return gogFromReg(await env.reg(GOG_KEY)).filter((g) => env.exists(g.exe!))
+  }
+}
diff --git a/src/main/scanners/index.ts b/src/main/scanners/index.ts
new file mode 100644
index 0000000..f2014af
--- /dev/null
+++ b/src/main/scanners/index.ts
@@ -0,0 +1,46 @@
+/* Lance les scanners actifs en parallèle ; un scanner qui échoue ou traîne est ignoré et journalisé. */
+import { existsSync, readdirSync, readFileSync } from 'node:fs'
+import type { ScannerId, Settings } from '../../shared/types'
+import { log } from '../log'
+import { ea } from './ea'
+import { epic } from './epic'
+import { gog } from './gog'
+import { regQuery } from './reg'
+import { steam } from './steam'
+import type { Scanner, ScanEnv, ScannedGame } from './types'
+import { ubisoft } from './ubisoft'
+
+const L = log('scan')
+export const ALL_SCANNERS: Scanner[] = [steam, epic, gog, ubisoft, ea]
+
+export const realEnv: ScanEnv = {
+  programData: process.env.PROGRAMDATA ?? 'C:\\ProgramData',
+  reg: regQuery,
+  exists: (p) => existsSync(p),
+  readText: (p) => readFileSync(p, 'utf8'),
+  list: (d) => { try { return readdirSync(d) } catch { return [] } }
+}
+
+export interface ScanResult {
+  ok: Partial<Record<ScannerId, ScannedGame[]>> // scanners terminés (même avec 0 jeu)
+  failed: ScannerId[]
+}
+
+const withTimeout = <T>(p: Promise<T>, ms: number) => Promise.race([p, new Promise<T>((_, rej) => setTimeout(() => rej(new Error(`délai dépassé (${ms} ms)`)), ms))])
+
+export async function runScanners(settings: Settings, env: ScanEnv = realEnv, scanners = ALL_SCANNERS): Promise<ScanResult> {
+  const res: ScanResult = { ok: {}, failed: [] }
+  await Promise.all(
+    scanners.filter((s) => settings.scanners[s.id]).map(async (s) => {
+      const t = Date.now()
+      try {
+        res.ok[s.id] = await withTimeout(s.scan(env), 30000)
+        L.info(s.name, res.ok[s.id]!.length, 'jeux en', Date.now() - t, 'ms')
+      } catch (e) {
+        res.failed.push(s.id)
+        L.error(s.name, 'a échoué', e)
+      }
+    })
+  )
+  return res
+}
diff --git a/src/main/scanners/merge.ts b/src/main/scanners/merge.ts
new file mode 100644
index 0000000..581abb7
--- /dev/null
+++ b/src/main/scanners/merge.ts
@@ -0,0 +1,56 @@
+/* Fusion d'un scan avec la bibliothèque existante. Pur : testé sans Windows.
+   - jeu nouveau : ajouté (addedAt = maintenant)
+   - jeu connu : chemins / lancement mis à jour, données de l'utilisateur gardées (favori, temps, collections, nom modifié)
+   - jeu d'un scanner terminé mais plus trouvé : marqué désinstallé (jamais supprimé : on garde temps de jeu et collections)
+   - scanner en échec ou désactivé : ses jeux ne bougent pas
+   - doublons : même id, ou même dossier d'installation qu'un jeu d'une plateforme (le jeu ajouté à la main est fusionné dedans) */
+import type { Game, ScannerId } from '../../shared/types'
+import type { ScanResult } from './index'
+import type { ScannedGame } from './types'
+
+export const gameId = (g: Pick<Game, 'platform' | 'platformId'>) => `${g.platform}:${g.platformId}`
+const norm = (p?: string) => p?.toLowerCase().replace(/[\\/]+$/, '').replace(/\//g, '\\')
+
+export interface MergeStats { added: number; updated: number; uninstalled: number; merged: number }
+
+export function mergeScan(existing: Game[], result: Pick<ScanResult, 'ok'>, now = Date.now()): { games: Game[]; stats: MergeStats } {
+  const byId = new Map(existing.map((g) => [g.id, { ...g }]))
+  const stats: MergeStats = { added: 0, updated: 0, uninstalled: 0, merged: 0 }
+  const seen = new Set<string>()
+
+  for (const [scanner, list] of Object.entries(result.ok) as [ScannerId, ScannedGame[]][]) {
+    for (const s of list) {
+      const id = gameId(s)
+      if (seen.has(id)) continue // même jeu listé deux fois (deux bibliothèques Steam…)
+      seen.add(id)
+      const old = byId.get(id)
+      const fresh = { installDir: s.installDir, exe: s.exe ?? old?.exe, launchUri: s.launchUri, steamAppId: s.steamAppId ?? old?.steamAppId, installed: s.installed ?? true }
+      if (old) {
+        Object.assign(old, fresh, old.nameLocked ? {} : { name: s.name }, old.argsLocked ? {} : { args: s.args, workDir: s.workDir })
+        stats.updated++
+      } else {
+        byId.set(id, { id, platform: s.platform, platformId: s.platformId, name: s.name, args: s.args, workDir: s.workDir, ...fresh, favorite: false, hidden: false, addedAt: now, playtime: 0, collections: [], media: {} })
+        stats.added++
+      }
+    }
+    for (const g of byId.values()) {
+      if (g.platform === scanner && !seen.has(g.id) && g.installed) { g.installed = false; stats.uninstalled++ }
+    }
+  }
+
+  // un jeu ajouté à la main dont l'exe est dans le dossier d'un jeu détecté : on fusionne dans le jeu détecté
+  const platformGames = [...byId.values()].filter((g) => g.platform !== 'manual' && g.installDir)
+  for (const m of [...byId.values()].filter((g) => g.platform === 'manual' && g.exe)) {
+    const exe = norm(m.exe)!
+    const host = platformGames.find((g) => exe.startsWith(norm(g.installDir)! + '\\'))
+    if (!host) continue
+    host.playtime += m.playtime
+    host.favorite ||= m.favorite
+    host.lastPlayed = Math.max(host.lastPlayed ?? 0, m.lastPlayed ?? 0) || undefined
+    host.collections = [...new Set([...host.collections, ...m.collections])]
+    host.media = { ...m.media, ...host.media }
+    byId.delete(m.id)
+    stats.merged++
+  }
+  return { games: [...byId.values()], stats }
+}
diff --git a/src/main/scanners/reg.ts b/src/main/scanners/reg.ts
new file mode 100644
index 0000000..586591b
--- /dev/null
+++ b/src/main/scanners/reg.ts
@@ -0,0 +1,34 @@
+/* Lecture du registre Windows via reg.exe (pas de module natif). Parseur pur, testé. */
+import { execFile } from 'node:child_process'
+
+/* Sortie de `reg query <clé> /s` -> clé complète -> { nomDeValeur: donnée } ; la valeur par défaut a le nom "" */
+export function parseReg(out: string): Map<string, Record<string, string>> {
+  const res = new Map<string, Record<string, string>>()
+  let cur: Record<string, string> | null = null
+  for (const raw of out.split(/\r?\n/)) {
+    if (!raw.trim()) continue
+    if (/^HKEY_/i.test(raw)) {
+      cur = {}
+      res.set(raw.trim().toUpperCase(), cur)
+      continue
+    }
+    const m = raw.match(/^\s{2,}(.*?)\s{2,}(REG_\w+)(?:\s{2,}(.*))?$/)
+    if (m && cur) cur[m[1] === '(Default)' || m[1] === '(par défaut)' ? '' : m[1]] = m[3] ?? ''
+  }
+  return res
+}
+
+export function regQuery(key: string): Promise<Map<string, Record<string, string>>> {
+  if (process.platform !== 'win32') return Promise.resolve(new Map())
+  return new Promise((resolve) => {
+    execFile('reg', ['query', key, '/s'], { windowsHide: true, timeout: 15000, maxBuffer: 32 * 1024 * 1024 }, (err, stdout) => {
+      resolve(err ? new Map() : parseReg(stdout)) // clé absente = rien d'installé, pas une erreur
+    })
+  })
+}
+
+/* Sous-clés directes d'une clé (une entrée par jeu chez GOG / Ubisoft) */
+export function children(map: Map<string, Record<string, string>>, parent: string): [string, Record<string, string>][] {
+  const p = parent.toUpperCase() + '\\'
+  return [...map].filter(([k]) => k.startsWith(p) && !k.slice(p.length).includes('\\')).map(([k, v]) => [k.slice(p.length), v])
+}
diff --git a/src/main/scanners/steam.ts b/src/main/scanners/steam.ts
new file mode 100644
index 0000000..ebeaea6
--- /dev/null
+++ b/src/main/scanners/steam.ts
@@ -0,0 +1,73 @@
+/* Steam : dossier via le registre, bibliothèques via libraryfolders.vdf, jeux via appmanifest_*.acf. */
+import { win32 as path } from 'node:path'
+import type { Scanner, ScanEnv, ScannedGame } from './types'
+import { get, parseVdf, type Vdf } from './vdf'
+
+// outils et runtimes listés comme des jeux par Steam
+const NOT_GAMES = /^(Steamworks Common Redistributables|Steam Linux Runtime.*|Proton.*|SteamVR.*|Steam Controller Configs|Spacewar)$/i
+const TOOL_IDS = new Set(['228980', '1070560', '1391110', '1628350', '250820', '1493710'])
+
+export async function steamRoot(env: ScanEnv): Promise<string | null> {
+  for (const key of ['HKCU\\Software\\Valve\\Steam', 'HKLM\\SOFTWARE\\WOW6432Node\\Valve\\Steam', 'HKLM\\SOFTWARE\\Valve\\Steam']) {
+    for (const vals of (await env.reg(key)).values()) {
+      const p = vals.SteamPath ?? vals.InstallPath
+      if (p) return path.normalize(p)
+    }
+  }
+  const def = 'C:\\Program Files (x86)\\Steam'
+  return env.exists(def) ? def : null
+}
+
+/* Dossiers de bibliothèque : format récent ("0" { "path" … }) et ancien ("1" "D:\\Steam") */
+export function libraryPaths(vdfText: string, root: string): string[] {
+  const lf = get(parseVdf(vdfText), 'libraryfolders')
+  const out = new Set([path.normalize(root)])
+  if (lf && typeof lf === 'object') {
+    for (const [k, v] of Object.entries(lf)) {
+      if (!/^\d+$/.test(k)) continue
+      const p = typeof v === 'string' ? v : (get(v, 'path') as string | undefined)
+      if (p) out.add(path.normalize(p))
+    }
+  }
+  return [...out]
+}
+
+export function parseManifest(acf: string, library: string): ScannedGame | null {
+  const st = get(parseVdf(acf), 'AppState') as Vdf | undefined
+  const appid = get(st, 'appid'), name = get(st, 'name'), dir = get(st, 'installdir'), flags = Number(get(st, 'StateFlags') ?? 0)
+  if (typeof appid !== 'string' || typeof name !== 'string' || TOOL_IDS.has(appid) || NOT_GAMES.test(name)) return null
+  return {
+    platform: 'steam',
+    platformId: appid,
+    name,
+    steamAppId: appid,
+    installDir: typeof dir === 'string' ? path.join(library, 'steamapps', 'common', dir) : undefined,
+    launchUri: `steam://rungameid/${appid}`,
+    installed: (flags & 4) === 4 // 4 = entièrement installé
+  }
+}
+
+export const steam: Scanner = {
+  id: 'steam',
+  name: 'Steam',
+  async scan(env) {
+    const root = await steamRoot(env)
+    if (!root) return []
+    const vdf = path.join(root, 'steamapps', 'libraryfolders.vdf')
+    const libs = env.exists(vdf) ? libraryPaths(env.readText(vdf), root) : [root]
+    const games: ScannedGame[] = []
+    for (const lib of libs) {
+      const apps = path.join(lib, 'steamapps')
+      for (const f of env.list(apps)) {
+        if (!/^appmanifest_\d+\.acf$/i.test(f)) continue
+        try {
+          const g = parseManifest(env.readText(path.join(apps, f)), lib)
+          if (g) games.push(g)
+        } catch {
+          /* manifeste en cours d'écriture par Steam : ignoré ce coup-ci */
+        }
+      }
+    }
+    return games
+  }
+}
diff --git a/src/main/scanners/types.ts b/src/main/scanners/types.ts
new file mode 100644
index 0000000..8189e55
--- /dev/null
+++ b/src/main/scanners/types.ts
@@ -0,0 +1,18 @@
+/* Interface commune des scanners : chacun est isolé, peut échouer sans gêner les autres. */
+import type { Game, ScannerId } from '../../shared/types'
+
+export type ScannedGame = Pick<Game, 'platform' | 'platformId' | 'name'> & Partial<Pick<Game, 'installDir' | 'exe' | 'args' | 'workDir' | 'launchUri' | 'steamAppId' | 'installed'>>
+
+export interface ScanEnv {
+  programData: string // C:\ProgramData
+  reg: (key: string) => Promise<Map<string, Record<string, string>>> // lecture du registre (récursive)
+  exists: (p: string) => boolean
+  readText: (p: string) => string
+  list: (dir: string) => string[] // noms de fichiers d'un dossier ([] s'il n'existe pas)
+}
+
+export interface Scanner {
+  id: ScannerId
+  name: string
+  scan: (env: ScanEnv) => Promise<ScannedGame[]>
+}
diff --git a/src/main/scanners/ubisoft.ts b/src/main/scanners/ubisoft.ts
new file mode 100644
index 0000000..152367a
--- /dev/null
+++ b/src/main/scanners/ubisoft.ts
@@ -0,0 +1,25 @@
+/* Ubisoft Connect : jeux installés dans le registre, lancement via uplay://. Le nom vient du dossier d'installation. */
+import { win32 as path } from 'node:path'
+import { children } from './reg'
+import type { Scanner, ScannedGame } from './types'
+
+export const UBI_KEY = 'HKEY_LOCAL_MACHINE\\SOFTWARE\\WOW6432Node\\Ubisoft\\Launcher\\Installs'
+
+export function ubisoftFromReg(map: Map<string, Record<string, string>>): ScannedGame[] {
+  const out: ScannedGame[] = []
+  for (const [id, v] of children(map, UBI_KEY)) {
+    const dir = v.InstallDir
+    if (!dir || !/^\d+$/.test(id)) continue
+    const clean = path.normalize(dir.replace(/\//g, '\\'))
+    out.push({ platform: 'ubisoft', platformId: id, name: path.basename(clean), installDir: clean, launchUri: `uplay://launch/${id}/0`, installed: true })
+  }
+  return out
+}
+
+export const ubisoft: Scanner = {
+  id: 'ubisoft',
+  name: 'Ubisoft Connect',
+  async scan(env) {
+    return ubisoftFromReg(await env.reg(UBI_KEY)).filter((g) => env.exists(g.installDir!))
+  }
+}
diff --git a/src/main/scanners/vdf.ts b/src/main/scanners/vdf.ts
new file mode 100644
index 0000000..79044b7
--- /dev/null
+++ b/src/main/scanners/vdf.ts
@@ -0,0 +1,47 @@
+/* Parseur du format texte KeyValues de Valve (libraryfolders.vdf, appmanifest_*.acf). */
+export type Vdf = { [k: string]: string | Vdf }
+
+export function parseVdf(text: string): Vdf {
+  let i = 0
+  const n = text.length
+  const skip = () => {
+    for (;;) {
+      while (i < n && /\s/.test(text[i])) i++
+      if (text[i] === '/' && text[i + 1] === '/') { while (i < n && text[i] !== '\n') i++; continue }
+      return
+    }
+  }
+  const str = (): string => {
+    if (text[i] !== '"') { // jeton sans guillemets
+      const s = i
+      while (i < n && !/[\s{}"]/.test(text[i])) i++
+      return text.slice(s, i)
+    }
+    i++
+    let out = ''
+    while (i < n && text[i] !== '"') {
+      if (text[i] === '\\' && i + 1 < n) { const c = text[++i]; out += c === 'n' ? '\n' : c === 't' ? '\t' : c } else out += text[i]
+      i++
+    }
+    i++
+    return out
+  }
+  const obj = (): Vdf => {
+    const o: Vdf = {}
+    for (;;) {
+      skip()
+      if (i >= n || text[i] === '}') { i++; return o }
+      const k = str()
+      skip()
+      if (text[i] === '{') { i++; o[k] = obj() } else o[k] = str()
+    }
+  }
+  return obj()
+}
+
+/* Accès insensible à la casse (les clés varient : "AppState" / "appstate") */
+export function get(o: Vdf | string | undefined, key: string): Vdf | string | undefined {
+  if (!o || typeof o === 'string') return undefined
+  const k = Object.keys(o).find((x) => x.toLowerCase() === key.toLowerCase())
+  return k === undefined ? undefined : o[k]
+}
diff --git a/src/main/validate.ts b/src/main/validate.ts
index 4edf008..8b46800 100644
--- a/src/main/validate.ts
+++ b/src/main/validate.ts
@@ -60,3 +60,16 @@ export function gamePatch(p: unknown): GamePatch {
   }
   return o
 }
+
+export function manualInput(p: unknown): { name: string; exe: string; args?: string; workDir?: string } {
+  if (!p || typeof p !== 'object') throw new InvalidInput('jeu invalide')
+  const i = p as Record<string, unknown>
+  const exe = str(i.exe, 260, 'exécutable')
+  if (!/\.(exe|bat|cmd|lnk|url)$/i.test(exe)) throw new InvalidInput('exécutable .exe, .bat, .cmd, .lnk ou .url attendu')
+  return {
+    name: str(i.name ?? '', 200, 'nom').trim() || exe.split(/[\\/]/).pop()!.replace(/\.\w+$/, ''),
+    exe,
+    args: i.args === undefined ? undefined : str(i.args, 1000, 'arguments'),
+    workDir: i.workDir === undefined || i.workDir === '' ? undefined : str(i.workDir, 260, 'dossier de travail')
+  }
+}
diff --git a/src/renderer/src/dev/mock.ts b/src/renderer/src/dev/mock.ts
index 444cd65..13ccbdd 100644
--- a/src/renderer/src/dev/mock.ts
+++ b/src/renderer/src/dev/mock.ts
@@ -8,7 +8,17 @@ const fire = <E extends EventName>(e: E, p: Events[E]) => listeners.get(e)?.forE
 
 let settings: Settings = { ...DEFAULT_SETTINGS }
 const collections: Collection[] = []
-const games: Game[] = []
+const SAMPLE: [string, string, string][] = [
+  ['367520', 'Hollow Knight', 'steam'], ['1245620', 'ELDEN RING', 'steam'], ['1145360', 'Hades', 'steam'], ['504230', 'Celeste', 'steam'],
+  ['413150', 'Stardew Valley', 'steam'], ['1091500', 'Cyberpunk 2077', 'gog'], ['292030', 'The Witcher 3: Wild Hunt', 'gog'], ['620', 'Portal 2', 'steam'],
+  ['753640', 'Outer Wilds', 'epic'], ['632470', 'Disco Elysium', 'steam'], ['374320', 'DARK SOULS III', 'steam'], ['1086940', "Baldur's Gate 3", 'steam'],
+  ['814380', 'Sekiro: Shadows Die Twice', 'steam'], ['1092790', 'Inscryption', 'epic'], ['1687950', 'Persona 5 Royal', 'steam'], ['2552430', 'KINGDOM HEARTS -HD 1.5+2.5 ReMIX-', 'epic']
+]
+const day = 864e5
+const games: Game[] = SAMPLE.map(([appid, name, platform], i) => ({
+  id: `${platform}:${appid}`, platform: platform as Game['platform'], platformId: appid, name, steamAppId: appid, installed: i !== 13, favorite: i % 5 === 0, hidden: false,
+  addedAt: Date.now() - i * 3 * day, lastPlayed: i < 6 ? Date.now() - i * day : undefined, playtime: (16 - i) * 3600 * 2.3, collections: [], media: {}
+}))
 
 async function themes(): Promise<ThemeEntry[]> {
   const out: ThemeEntry[] = []
@@ -33,6 +43,15 @@ export const mock: OrbeApi = {
     fire('library:changed', games)
     return g
   },
+  'library:rescan': async () => ({ added: 0, updated: games.length, uninstalled: 0, merged: 0, failed: [], total: games.length }),
+  'library:addManual': async (input) => {
+    const g: Game = { id: 'manual:' + Date.now(), platform: 'manual', platformId: String(Date.now()), ...input, installed: true, favorite: false, hidden: false, addedAt: Date.now(), playtime: 0, collections: [], media: {} }
+    games.push(g)
+    fire('library:changed', games)
+    return g
+  },
+  'library:remove': async (id) => { games.splice(games.findIndex((g) => g.id === id), 1); fire('library:changed', games) },
+  'fs:list': async (dir) => ({ dir, parent: dir ? '' : null, entries: dir ? [{ name: 'Jeu.exe', path: dir + '\\Jeu.exe', dir: false }] : [{ name: 'C:\\', path: 'C:\\', dir: true }] }),
   'collections:list': async () => collections,
   'collections:create': async (name) => {
     const c = { id: String(Date.now()), name, createdAt: Date.now() }
diff --git a/src/shared/ipc.ts b/src/shared/ipc.ts
index c16c542..a664283 100644
--- a/src/shared/ipc.ts
+++ b/src/shared/ipc.ts
@@ -1,7 +1,27 @@
 /* Contrat IPC : une seule source de vérité pour le preload (window.orbe) et les handlers du processus principal. */
-import type { AppInfo, Collection, Game, Settings } from './types'
+import type { AppInfo, Collection, Game, ScannerId, Settings } from './types'
 import type { ThemeManifest } from './theme'
 
+export interface ScanReport {
+  added: number
+  updated: number
+  uninstalled: number
+  merged: number
+  failed: ScannerId[]
+  total: number
+}
+
+export interface ManualGameInput {
+  name: string
+  exe: string
+  args?: string
+  workDir?: string
+}
+
+export interface FsEntry { name: string; path: string; dir: boolean }
+export interface FsListing { dir: string; parent: string | null; entries: FsEntry[] }
+export type FsFilter = 'exe' | 'image' | 'dir'
+
 export interface ThemeEntry {
   manifest: ThemeManifest
   base: string // URL de base des fichiers du thème (orbe-theme://<id>/)
@@ -13,6 +33,10 @@ export interface Api {
   'app:info': () => Promise<AppInfo>
   'library:list': () => Promise<Game[]>
   'library:update': (id: string, patch: Partial<Pick<Game, 'name' | 'favorite' | 'hidden' | 'exe' | 'args' | 'workDir' | 'collections'>>) => Promise<Game>
+  'library:rescan': () => Promise<ScanReport>
+  'library:addManual': (input: ManualGameInput) => Promise<Game>
+  'library:remove': (id: string) => Promise<void>
+  'fs:list': (dir: string, filter: FsFilter) => Promise<FsListing>
   'collections:list': () => Promise<Collection[]>
   'collections:create': (name: string) => Promise<Collection>
   'collections:rename': (id: string, name: string) => Promise<void>
@@ -25,6 +49,7 @@ export interface Api {
 /* Événements poussés par le processus principal vers l'interface */
 export interface Events {
   'library:changed': Game[]
+  'scan:state': { running: boolean; report?: ScanReport }
   'settings:changed': Settings
   'themes:changed': { id: string; themes: ThemeEntry[] }
 }
@@ -36,6 +61,10 @@ export const CHANNELS = [
   'app:info',
   'library:list',
   'library:update',
+  'library:rescan',
+  'library:addManual',
+  'library:remove',
+  'fs:list',
   'collections:list',
   'collections:create',
   'collections:rename',
@@ -45,7 +74,7 @@ export const CHANNELS = [
   'themes:list'
 ] as const satisfies readonly Channel[]
 
-export const EVENTS = ['library:changed', 'settings:changed', 'themes:changed'] as const satisfies readonly EventName[]
+export const EVENTS = ['library:changed', 'scan:state', 'settings:changed', 'themes:changed'] as const satisfies readonly EventName[]
 
 /* Ce que l'interface voit dans window.orbe */
 export type OrbeApi = Api & {
diff --git a/src/shared/types.ts b/src/shared/types.ts
index b4114a7..8cf3df6 100644
--- a/src/shared/types.ts
+++ b/src/shared/types.ts
@@ -38,6 +38,8 @@ export interface Game {
   media: GameMedia
   info?: GameInfo
   steamAppId?: string // utile pour les médias même hors Steam
+  nameLocked?: boolean // nom modifié par l'utilisateur : le scan ne l'écrase plus
+  argsLocked?: boolean // arguments / dossier de travail modifiés à la main
 }
 
 export interface Session {
diff --git a/tests/fixtures/appmanifest_367520.acf b/tests/fixtures/appmanifest_367520.acf
new file mode 100644
index 0000000..9fde2b4
--- /dev/null
+++ b/tests/fixtures/appmanifest_367520.acf
@@ -0,0 +1,13 @@
+"AppState"
+{
+	"appid"		"367520"
+	"universe"		"1"
+	"name"		"Hollow Knight"
+	"StateFlags"		"4"
+	"installdir"		"Hollow Knight"
+	// commentaire
+	"UserConfig"
+	{
+		"language"		"french"
+	}
+}
diff --git a/tests/fixtures/epic.item b/tests/fixtures/epic.item
new file mode 100644
index 0000000..ced59a4
--- /dev/null
+++ b/tests/fixtures/epic.item
@@ -0,0 +1,13 @@
+{
+  "FormatVersion": 0,
+  "bIsIncompleteInstall": false,
+  "LaunchCommand": "",
+  "LaunchExecutable": "Binaries/Win64/Game.exe",
+  "DisplayName": "Outer Wilds",
+  "InstallLocation": "C:\\Program Files\\Epic Games\\OuterWilds",
+  "CatalogNamespace": "ns123",
+  "CatalogItemId": "item456",
+  "AppName": "Bison",
+  "MainGameAppName": "Bison",
+  "AppCategories": ["public", "games", "applications"]
+}
diff --git a/tests/fixtures/gog-reg.txt b/tests/fixtures/gog-reg.txt
new file mode 100644
index 0000000..11809ef
--- /dev/null
+++ b/tests/fixtures/gog-reg.txt
@@ -0,0 +1,19 @@
+
+HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\GOG.com\Games
+
+HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\GOG.com\Games\1207658924
+    gameName    REG_SZ    The Witcher 3: Wild Hunt
+    exe    REG_SZ    D:\GOG Games\The Witcher 3\bin\x64\witcher3.exe
+    path    REG_SZ    D:\GOG Games\The Witcher 3
+    workingDir    REG_SZ    D:\GOG Games\The Witcher 3\bin\x64
+    launchParam    REG_SZ    
+    gameID    REG_SZ    1207658924
+    dependsOn    REG_SZ    
+
+HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\GOG.com\Games\1640424747
+    gameName    REG_SZ    Witcher 3 DLC
+    exe    REG_SZ    D:\GOG Games\The Witcher 3\bin\x64\witcher3.exe
+    dependsOn    REG_SZ    1207658924
+
+HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\GOG.com\Games\1207658924\sub
+    x    REG_DWORD    0x1
diff --git a/tests/fixtures/installerdata.xml b/tests/fixtures/installerdata.xml
new file mode 100644
index 0000000..fa78b38
--- /dev/null
+++ b/tests/fixtures/installerdata.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<DiPManifest version="4.0">
+  <gameTitles>
+    <gameTitle locale="en_US">Mass Effect Legendary Edition</gameTitle>
+    <gameTitle locale="fr_FR">Mass Effect édition Légendaire</gameTitle>
+  </gameTitles>
+  <contentIDs><contentID>Origin.OFR.50.0004012</contentID></contentIDs>
+  <runtime>
+    <launcher>
+      <filePath>[HKEY_LOCAL_MACHINE\SOFTWARE\BioWare\Mass Effect Legendary Edition\Install Dir]\Game\Launcher\MassEffectLauncher.exe</filePath>
+    </launcher>
+  </runtime>
+</DiPManifest>
diff --git a/tests/fixtures/libraryfolders.vdf b/tests/fixtures/libraryfolders.vdf
new file mode 100644
index 0000000..b9701a5
--- /dev/null
+++ b/tests/fixtures/libraryfolders.vdf
@@ -0,0 +1,21 @@
+"libraryfolders"
+{
+	"0"
+	{
+		"path"		"C:\\Program Files (x86)\\Steam"
+		"label"		""
+		"apps"
+		{
+			"228980"		"1234"
+			"367520"		"9100000000"
+		}
+	}
+	"1"
+	{
+		"path"		"D:\\SteamLibrary"
+		"apps"
+		{
+			"1245620"		"50000000000"
+		}
+	}
+}
diff --git a/tests/merge.test.ts b/tests/merge.test.ts
new file mode 100644
index 0000000..06f2867
--- /dev/null
+++ b/tests/merge.test.ts
@@ -0,0 +1,34 @@
+import { describe, expect, it } from 'vitest'
+import { mergeScan } from '../src/main/scanners/merge'
+import type { Game } from '../src/shared/types'
+
+const base = (o: Partial<Game>): Game => ({ id: '', platform: 'steam', platformId: '', name: '', installed: true, favorite: false, hidden: false, addedAt: 0, playtime: 0, collections: [], media: {}, ...o })
+
+describe('mergeScan', () => {
+  it('ajoute, met à jour et garde les données utilisateur', () => {
+    const old = [base({ id: 'steam:1', platformId: '1', name: 'Vieux nom', favorite: true, playtime: 500, collections: ['c'] })]
+    const { games, stats } = mergeScan(old, { ok: { steam: [{ platform: 'steam', platformId: '1', name: 'Nouveau', installDir: 'C:\\A' }, { platform: 'steam', platformId: '2', name: 'B' }] } }, 42)
+    expect(stats).toMatchObject({ added: 1, updated: 1 })
+    const a = games.find((g) => g.id === 'steam:1')!
+    expect(a).toMatchObject({ name: 'Nouveau', favorite: true, playtime: 500, collections: ['c'], installDir: 'C:\\A' })
+    expect(games.find((g) => g.id === 'steam:2')!.addedAt).toBe(42)
+  })
+  it('ne renomme pas un jeu renommé par l’utilisateur', () => {
+    const { games } = mergeScan([base({ id: 'steam:1', platformId: '1', name: 'Mon nom', nameLocked: true })], { ok: { steam: [{ platform: 'steam', platformId: '1', name: 'Officiel' }] } })
+    expect(games[0].name).toBe('Mon nom')
+  })
+  it('marque désinstallé, sans toucher aux scanners en échec', () => {
+    const old = [base({ id: 'steam:1', platformId: '1' }), base({ id: 'epic:x', platform: 'epic', platformId: 'x' })]
+    const { games, stats } = mergeScan(old, { ok: { steam: [] } })
+    expect(stats.uninstalled).toBe(1)
+    expect(games.find((g) => g.id === 'steam:1')!.installed).toBe(false)
+    expect(games.find((g) => g.id === 'epic:x')!.installed).toBe(true)
+  })
+  it('dédoublonne et fusionne un ajout manuel dans le jeu détecté', () => {
+    const old = [base({ id: 'manual:m', platform: 'manual', platformId: 'm', exe: 'D:\\GOG Games\\W3\\bin\\w3.exe', playtime: 100, favorite: true })]
+    const { games, stats } = mergeScan(old, { ok: { gog: [{ platform: 'gog', platformId: '9', name: 'W3', installDir: 'D:\\GOG Games\\W3' }, { platform: 'gog', platformId: '9', name: 'W3' }] } })
+    expect(games).toHaveLength(1)
+    expect(stats.merged).toBe(1)
+    expect(games[0]).toMatchObject({ id: 'gog:9', playtime: 100, favorite: true })
+  })
+})
diff --git a/tests/scanners.test.ts b/tests/scanners.test.ts
new file mode 100644
index 0000000..6fb74c1
--- /dev/null
+++ b/tests/scanners.test.ts
@@ -0,0 +1,99 @@
+import { readFileSync } from 'node:fs'
+import { join } from 'node:path'
+import { describe, expect, it } from 'vitest'
+import { parseInstallerData } from '../src/main/scanners/ea'
+import { parseEpicItem } from '../src/main/scanners/epic'
+import { gogFromReg } from '../src/main/scanners/gog'
+import { runScanners } from '../src/main/scanners/index'
+import { parseReg } from '../src/main/scanners/reg'
+import { libraryPaths, parseManifest, steam } from '../src/main/scanners/steam'
+import type { ScanEnv, Scanner } from '../src/main/scanners/types'
+import { ubisoftFromReg, UBI_KEY } from '../src/main/scanners/ubisoft'
+import { parseVdf } from '../src/main/scanners/vdf'
+import { DEFAULT_SETTINGS } from '../src/shared/types'
+
+const fx = (f: string) => readFileSync(join(__dirname, 'fixtures', f), 'utf8')
+
+describe('VDF', () => {
+  it('lit objets imbriqués, échappements et commentaires', () => {
+    const v = parseVdf(fx('appmanifest_367520.acf')) as any
+    expect(v.AppState.name).toBe('Hollow Knight')
+    expect(v.AppState.UserConfig.language).toBe('french')
+    expect((parseVdf('"a" { "p" "C:\\\\x\\"y" }') as any).a.p).toBe('C:\\x"y')
+  })
+})
+
+describe('Steam', () => {
+  it('trouve toutes les bibliothèques (nouveau et ancien format)', () => {
+    expect(libraryPaths(fx('libraryfolders.vdf'), 'C:\\Program Files (x86)\\Steam')).toEqual(['C:\\Program Files (x86)\\Steam', 'D:\\SteamLibrary'])
+    expect(libraryPaths('"LibraryFolders" { "TimeNextStatsReport" "1" "1" "E:\\\\Jeux" }', 'C:\\Steam')).toEqual(['C:\\Steam', 'E:\\Jeux'])
+  })
+  it('lit un manifeste et ignore les outils', () => {
+    expect(parseManifest(fx('appmanifest_367520.acf'), 'D:\\SteamLibrary')).toMatchObject({
+      platformId: '367520', name: 'Hollow Knight', installDir: 'D:\\SteamLibrary\\steamapps\\common\\Hollow Knight', launchUri: 'steam://rungameid/367520', installed: true
+    })
+    expect(parseManifest('"AppState" { "appid" "228980" "name" "Steamworks Common Redistributables" }', 'C:\\')).toBeNull()
+    expect(parseManifest('"AppState" { "appid" "1" "name" "Jeu" "StateFlags" "1026" }', 'C:\\')?.installed).toBe(false)
+  })
+  it('scan complet sur un faux disque', async () => {
+    const files: Record<string, string> = {
+      'C:\\Steam\\steamapps\\libraryfolders.vdf': '"libraryfolders" { "0" { "path" "C:\\\\Steam" } "1" { "path" "D:\\\\Lib" } }',
+      'C:\\Steam\\steamapps\\appmanifest_367520.acf': fx('appmanifest_367520.acf'),
+      'D:\\Lib\\steamapps\\appmanifest_620.acf': '"AppState" { "appid" "620" "name" "Portal 2" "StateFlags" "4" "installdir" "Portal 2" }'
+    }
+    const env: ScanEnv = {
+      programData: 'C:\\ProgramData',
+      reg: async (k) => new Map(k.startsWith('HKCU') ? [[k.toUpperCase(), { SteamPath: 'C:/Steam' }]] : []),
+      exists: (p) => p in files,
+      readText: (p) => files[p],
+      list: (d) => Object.keys(files).filter((f) => f.startsWith(d + '\\')).map((f) => f.slice(d.length + 1))
+    }
+    expect((await steam.scan(env)).map((g) => g.name).sort()).toEqual(['Hollow Knight', 'Portal 2'])
+  })
+})
+
+describe('Epic', () => {
+  it('lit un manifeste .item', () => {
+    expect(parseEpicItem(fx('epic.item'))).toMatchObject({
+      platformId: 'Bison', name: 'Outer Wilds',
+      exe: 'C:\\Program Files\\Epic Games\\OuterWilds\\Binaries\\Win64\\Game.exe',
+      launchUri: 'com.epicgames.launcher://apps/ns123%3Aitem456%3ABison?action=launch&silent=true'
+    })
+  })
+  it('ignore DLC et applications', () => {
+    expect(parseEpicItem(JSON.stringify({ ...JSON.parse(fx('epic.item')), MainGameAppName: 'Autre' }))).toBeNull()
+    expect(parseEpicItem(JSON.stringify({ ...JSON.parse(fx('epic.item')), AppCategories: ['engines'] }))).toBeNull()
+  })
+})
+
+describe('registre', () => {
+  it('parse la sortie de reg query', () => {
+    const m = parseReg(fx('gog-reg.txt'))
+    expect(m.get('HKEY_LOCAL_MACHINE\\SOFTWARE\\WOW6432NODE\\GOG.COM\\GAMES\\1207658924')?.gameName).toBe('The Witcher 3: Wild Hunt')
+    expect(m.get('HKEY_LOCAL_MACHINE\\SOFTWARE\\WOW6432NODE\\GOG.COM\\GAMES\\1207658924')?.launchParam).toBe('')
+  })
+  it('GOG : jeux sans DLC ni sous-clés', () => {
+    const g = gogFromReg(parseReg(fx('gog-reg.txt')))
+    expect(g).toHaveLength(1)
+    expect(g[0]).toMatchObject({ platformId: '1207658924', exe: 'D:\\GOG Games\\The Witcher 3\\bin\\x64\\witcher3.exe', args: undefined })
+  })
+  it('Ubisoft : nom tiré du dossier', () => {
+    const m = parseReg(`${UBI_KEY}\\635\r\n    InstallDir    REG_SZ    C:/Program Files (x86)/Ubisoft/Ubisoft Game Launcher/games/Assassin's Creed Origins/\r\n`)
+    expect(ubisoftFromReg(m)[0]).toMatchObject({ name: "Assassin's Creed Origins", launchUri: 'uplay://launch/635/0' })
+  })
+  it('EA : exe et titre depuis installerdata.xml', () => {
+    expect(parseInstallerData(fx('installerdata.xml'))).toEqual({ exe: 'Game\\Launcher\\MassEffectLauncher.exe', title: 'Mass Effect Legendary Edition', id: 'Origin.OFR.50.0004012' })
+  })
+})
+
+describe('runScanners', () => {
+  it('isole un scanner en échec et ignore les désactivés', async () => {
+    const ok: Scanner = { id: 'steam', name: 'ok', scan: async () => [{ platform: 'steam', platformId: '1', name: 'A' }] }
+    const ko: Scanner = { id: 'epic', name: 'ko', scan: async () => { throw new Error('boum') } }
+    const off: Scanner = { id: 'gog', name: 'off', scan: async () => [{ platform: 'gog', platformId: '2', name: 'B' }] }
+    const r = await runScanners({ ...DEFAULT_SETTINGS, scanners: { ...DEFAULT_SETTINGS.scanners, gog: false } }, {} as ScanEnv, [ok, ko, off])
+    expect(r.ok.steam).toHaveLength(1)
+    expect(r.failed).toEqual(['epic'])
+    expect(r.ok.gog).toBeUndefined()
+  })
+})