diff --git a/brain/app/core/config.py b/brain/app/core/config.py
index b5ec820..a5039e0 100644
--- a/brain/app/core/config.py
+++ b/brain/app/core/config.py
@@ -25,8 +25,8 @@ class Settings(BaseSettings):
         extra="ignore",
     )
 
-    # Provider LLM actif. "ollama" = local ; "onemin" = 1min.ai (etage 2).
-    llm_provider: Literal["ollama", "onemin"] = "ollama"
+    # Provider LLM actif. "ollama" = local ; "onemin" = 1min.ai ; "openrouter" = OpenRouter.
+    llm_provider: Literal["ollama", "onemin", "openrouter"] = "ollama"
 
     ollama_base_url: str = "http://localhost:11434"
     llm_model: str = "gemma4:26b"
@@ -47,6 +47,12 @@ class Settings(BaseSettings):
     onemin_api_key: str = ""
     onemin_model: str = "gpt-4o-mini"
 
+    # OpenRouter (OpenAI-compatible). Cle + modele modifiables depuis l'UI.
+    # Defaut = routeur `openrouter/free` : choisit un modele GRATUIT (0 credit).
+    # Pour un modele precis gratuit : id finissant par `:free`.
+    openrouter_api_key: str = ""
+    openrouter_model: str = "openrouter/free"
+
     # Taille cible d'un morceau (en tokens) pour l'import de PDF (regles/campagne).
     # Plus c'est gros, moins il y a de morceaux => moins de fragmentation et un
     # import plus rapide, MAIS il faut que ca tienne dans la fenetre du modele.
diff --git a/brain/app/core/settings_store.py b/brain/app/core/settings_store.py
index 10d1031..3e5d534 100644
--- a/brain/app/core/settings_store.py
+++ b/brain/app/core/settings_store.py
@@ -29,6 +29,8 @@ _ALLOWED_KEYS = frozenset({
     "llm_num_ctx",
     "onemin_api_key",
     "onemin_model",
+    "openrouter_api_key",
+    "openrouter_model",
     "import_chunk_tokens",
 })
 
diff --git a/brain/app/infrastructure/openrouter_adapter.py b/brain/app/infrastructure/openrouter_adapter.py
new file mode 100644
index 0000000..631ddaa
--- /dev/null
+++ b/brain/app/infrastructure/openrouter_adapter.py
@@ -0,0 +1,130 @@
+"""Adapter OpenRouter — implémente les ports LLMProvider / LLMChatProvider.
+
+OpenRouter expose l'API OpenAI standard (POST {base}/chat/completions, SSE), donc
+cet adapter est en réalité un client "OpenAI-compatible". Le `generate` one-shot
+passe lui aussi par le streaming (puis recollage) pour éviter les coupures de
+passerelle sur les longues générations (cf. 1min.ai / Cloudflare 524).
+
+Modèles GRATUITS : utiliser un id finissant par `:free` (ex.
+`meta-llama/llama-3.3-70b-instruct:free`) ou le routeur `openrouter/free` (défaut)
+qui choisit automatiquement un modèle gratuit — aucun crédit consommé.
+"""
+from __future__ import annotations
+
+import json
+from typing import AsyncIterator
+
+import httpx
+
+from app.core.config import Settings
+from app.domain.models import ChatMessage
+from app.domain.ports import LLMProviderError
+
+_API_URL = "https://openrouter.ai/api/v1/chat/completions"
+
+
+class OpenRouterLLMProvider:
+    """Adapter OpenRouter (OpenAI-compatible) — satisfait LLMProvider et LLMChatProvider."""
+
+    def __init__(self, settings: Settings) -> None:
+        if not settings.openrouter_api_key:
+            raise LLMProviderError(
+                "Clé API OpenRouter manquante. Configure-la depuis l'écran Paramètres."
+            )
+        self._api_key = settings.openrouter_api_key
+        self._model = settings.openrouter_model
+        self._timeout = settings.llm_timeout_seconds
+
+    def _headers(self) -> dict[str, str]:
+        return {
+            "Authorization": f"Bearer {self._api_key}",
+            "Content-Type": "application/json",
+            # Attribution facultative (classement OpenRouter) — sans impact fonctionnel.
+            "HTTP-Referer": "https://loremind.app",
+            "X-Title": "LoreMind",
+        }
+
+    async def generate(
+        self,
+        prompt: str,
+        *,
+        output_format: str | None = None,
+        temperature: float | None = None,
+    ) -> str:
+        """One-shot via streaming (puis recollage) pour robustesse sur longues sorties."""
+        chunks: list[str] = []
+        async for token in self._stream([ChatMessage(role="user", content=prompt)], None, temperature):
+            chunks.append(token)
+        return "".join(chunks)
+
+    async def stream_chat(
+        self,
+        messages: list[ChatMessage],
+        *,
+        system_prompt: str | None = None,
+        temperature: float | None = None,
+    ) -> AsyncIterator[str]:
+        async for token in self._stream(messages, system_prompt, temperature):
+            yield token
+
+    async def _stream(
+        self,
+        messages: list[ChatMessage],
+        system_prompt: str | None,
+        temperature: float | None,
+    ) -> AsyncIterator[str]:
+        payload_messages: list[dict[str, str]] = []
+        if system_prompt:
+            payload_messages.append({"role": "system", "content": system_prompt})
+        for m in messages:
+            payload_messages.append({"role": m.role, "content": m.content})
+
+        body: dict[str, object] = {
+            "model": self._model,
+            "messages": payload_messages,
+            "stream": True,
+        }
+        if temperature is not None:
+            body["temperature"] = temperature
+
+        async with httpx.AsyncClient(timeout=self._timeout) as client:
+            try:
+                async with client.stream(
+                    "POST", _API_URL, headers=self._headers(), json=body
+                ) as response:
+                    response.raise_for_status()
+                    async for token in self._parse_sse(response):
+                        yield token
+            except httpx.HTTPError as exc:
+                raise LLMProviderError(self._format_http_error(exc)) from exc
+
+    @staticmethod
+    async def _parse_sse(response: httpx.Response) -> AsyncIterator[str]:
+        """SSE OpenAI : lignes `data: {json}`, fin sur `data: [DONE]`."""
+        async for line in response.aiter_lines():
+            if not line or not line.startswith("data:"):
+                continue  # lignes vides ou commentaires keep-alive (`: ...`)
+            data = line[len("data:"):].strip()
+            if data == "[DONE]":
+                return
+            try:
+                obj = json.loads(data)
+            except json.JSONDecodeError:
+                continue
+            choices = obj.get("choices")
+            if not choices:
+                continue
+            delta = choices[0].get("delta") or {}
+            content = delta.get("content")
+            if content:
+                yield content
+
+    def _format_http_error(self, exc: httpx.HTTPError) -> str:
+        """Message lisible (timeout, quota 429, crédits 402, modèle inconnu…)."""
+        if isinstance(exc, httpx.TimeoutException):
+            return (
+                f"Erreur OpenRouter : délai dépassé (timeout {self._timeout}s). Le modèle a "
+                "mis trop de temps — réduis la taille des morceaux d'import ou augmente le timeout."
+            )
+        detail = str(exc) or exc.__class__.__name__
+        return f"Erreur OpenRouter ({exc.__class__.__name__}) : {detail}"
diff --git a/brain/app/main.py b/brain/app/main.py
index e0d3558..82fb6a5 100644
--- a/brain/app/main.py
+++ b/brain/app/main.py
@@ -45,12 +45,13 @@ from app.domain.models import (
 from app.domain.ports import LLMProvider, LLMProviderError, PdfExtractionError
 from app.infrastructure.ollama_adapter import OllamaLLMProvider
 from app.infrastructure.onemin_adapter import OneMinAiLLMProvider
+from app.infrastructure.openrouter_adapter import OpenRouterLLMProvider
 from app.infrastructure.pdf_extractor import PyMuPdfTextExtractor
 
 app = FastAPI(
     title="LoreMind Brain",
     description="Backend IA pour la génération de contenu narratif.",
-    version="0.10.1-beta",
+    version="0.10.2-beta",
 )
 
 
@@ -354,6 +355,8 @@ def get_llm_provider(
     try:
         if settings.llm_provider == "onemin":
             return OneMinAiLLMProvider(settings)
+        if settings.llm_provider == "openrouter":
+            return OpenRouterLLMProvider(settings)
         return OllamaLLMProvider(settings)
     except LLMProviderError as exc:
         # Ex : cle 1min.ai manquante. On renvoie du 400 plutot que du 500
@@ -688,7 +691,9 @@ async def chat_stream(
         "system": _count_tokens(system_prompt_preview),
         "history": sum(_count_tokens(m.content) for m in history_msgs),
         "current": _count_tokens(current_msg.content) if current_msg else 0,
-        "max": settings.llm_num_ctx,
+        # Plafond connu seulement pour Ollama (num_ctx). Pour le cloud (1min/OpenRouter)
+        # on ne connaît pas la fenêtre réelle → 0 = "pas de max" (jauge sans dénominateur).
+        "max": settings.llm_num_ctx if settings.llm_provider == "ollama" else 0,
     }
 
     async def event_stream() -> AsyncIterator[str]:
@@ -885,12 +890,15 @@ class SettingsDTO(BaseModel):
     Les secrets (onemin_api_key) sont masques en lecture.
     """
 
-    llm_provider: Literal["ollama", "onemin"]
+    llm_provider: Literal["ollama", "onemin", "openrouter"]
     ollama_base_url: str
     llm_model: str
     onemin_model: str
     # True si une cle 1min.ai est deja configuree — pas de leak de la cle elle-meme.
     onemin_api_key_set: bool
+    openrouter_model: str
+    # True si une cle OpenRouter est deja configuree (cle elle-meme jamais renvoyee).
+    openrouter_api_key_set: bool
     # Fenetre de contexte effective passee au modele (num_ctx Ollama) — sert
     # aussi de plafond a la jauge de contexte UI.
     llm_num_ctx: int
@@ -903,12 +911,14 @@ class SettingsDTO(BaseModel):
 class SettingsUpdateDTO(BaseModel):
     """Patch partiel des settings. Tous les champs sont optionnels."""
 
-    llm_provider: Literal["ollama", "onemin"] | None = None
+    llm_provider: Literal["ollama", "onemin", "openrouter"] | None = None
     ollama_base_url: str | None = None
     llm_model: str | None = None
     onemin_model: str | None = None
     # Chaine vide => on efface la cle. None => pas de changement.
     onemin_api_key: str | None = None
+    openrouter_model: str | None = None
+    openrouter_api_key: str | None = None
     llm_num_ctx: int | None = None
     import_chunk_tokens: int | None = None
     llm_timeout_seconds: int | None = None
@@ -921,6 +931,8 @@ def _to_settings_dto(s: Settings) -> SettingsDTO:
         llm_model=s.llm_model,
         onemin_model=s.onemin_model,
         onemin_api_key_set=bool(s.onemin_api_key),
+        openrouter_model=s.openrouter_model,
+        openrouter_api_key_set=bool(s.openrouter_api_key),
         llm_num_ctx=s.llm_num_ctx,
         import_chunk_tokens=s.import_chunk_tokens,
         llm_timeout_seconds=s.llm_timeout_seconds,
@@ -1081,6 +1093,51 @@ async def delete_ollama_model(
     return {"status": "deleted", "name": name}
 
 
+@app.get("/models/openrouter")
+async def list_openrouter_models() -> dict[str, list[dict[str, object]]]:
+    """Catalogue DYNAMIQUE des modeles OpenRouter (API publique, sans cle).
+
+    Renvoie {models: [{id, name, context_length, free}]}, trie gratuits d'abord
+    puis contexte decroissant. `free` = id finissant par ':free' OU prix nul.
+    """
+    try:
+        async with httpx.AsyncClient(timeout=20) as client:
+            response = await client.get("https://openrouter.ai/api/v1/models")
+            response.raise_for_status()
+            data = response.json()
+    except httpx.HTTPError as exc:
+        raise HTTPException(status_code=502, detail=f"OpenRouter injoignable : {exc}")
+
+    def _is_zero(value: object) -> bool:
+        try:
+            return float(value) == 0.0  # type: ignore[arg-type]
+        except (TypeError, ValueError):
+            return False
+
+    models: list[dict[str, object]] = []
+    for m in data.get("data", []) or []:
+        mid = str(m.get("id") or "")
+        if not mid:
+            continue
+        pricing = m.get("pricing") or {}
+        is_free = mid.endswith(":free") or (
+            _is_zero(pricing.get("prompt")) and _is_zero(pricing.get("completion"))
+        )
+        try:
+            ctx = int(m.get("context_length") or 0)
+        except (TypeError, ValueError):
+            ctx = 0
+        models.append({
+            "id": mid,
+            "name": str(m.get("name") or mid),
+            "context_length": ctx,
+            "free": is_free,
+        })
+
+    models.sort(key=lambda x: (not x["free"], -int(x["context_length"])))  # type: ignore[index]
+    return {"models": models}
+
+
 @app.get("/models/onemin")
 def list_onemin_models() -> dict[str, list[dict[str, object]]]:
     """Catalogue statique des modeles 1min.ai, groupes par fournisseur.
diff --git a/core/pom.xml b/core/pom.xml
index 3c56a3e..6bd466f 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -14,7 +14,7 @@
 
     <groupId>com.loremind</groupId>
     <artifactId>loremind-core</artifactId>
-    <version>0.10.1-beta</version>
+    <version>0.10.2-beta</version>
     <name>LoreMind Core</name>
     <description>Backend Core - Architecture Hexagonale</description>
 
diff --git a/core/src/main/java/com/loremind/application/generationcontext/SessionStructuralContextBuilder.java b/core/src/main/java/com/loremind/application/generationcontext/SessionStructuralContextBuilder.java
index 1c600c6..2b97308 100644
--- a/core/src/main/java/com/loremind/application/generationcontext/SessionStructuralContextBuilder.java
+++ b/core/src/main/java/com/loremind/application/generationcontext/SessionStructuralContextBuilder.java
@@ -174,10 +174,9 @@ public class SessionStructuralContextBuilder {
                 .filter(a -> a.getId() != null)
                 .collect(Collectors.toMap(Arc::getId, a -> a));
 
-        boolean anyHub = arcs.stream().anyMatch(a -> a.getType() == ArcType.HUB);
-        if (!anyHub) {
-            return new HubStatus(List.of(), List.of(), List.of(), activeFlags);
-        }
+        // On suit comme "quêtes" les chapitres CONDITIONNELS : ceux d'un arc HUB, ET
+        // ceux d'un arc linéaire qui portent des prérequis. Un chapitre linéaire sans
+        // condition reste hors du tableau (sinon tous les chapitres deviendraient des quêtes).
 
         // Map chapterId -> ProgressionStatus pour ce Playthrough
         Map<String, ProgressionStatus> progressionByChapter = new HashMap<>();
@@ -197,8 +196,10 @@ public class SessionStructuralContextBuilder {
         List<String> lockedTitles = new ArrayList<>();
 
         for (Arc arc : arcs) {
-            if (arc.getType() != ArcType.HUB) continue;
+            boolean isHub = arc.getType() == ArcType.HUB;
             for (Chapter c : chapterRepository.findByArcId(arc.getId())) {
+                boolean hasPrereqs = c.getPrerequisites() != null && !c.getPrerequisites().isEmpty();
+                if (!isHub && !hasPrereqs) continue;  // chapitre linéaire sans condition : ignoré
                 ProgressionStatus prog = progressionByChapter.getOrDefault(c.getId(), ProgressionStatus.NOT_STARTED);
                 QuestStatus status = prerequisiteEvaluator.computeStatus(prog, c.getPrerequisites(), ctx);
                 Arc parent = arcsById.get(c.getArcId());
diff --git a/core/src/main/java/com/loremind/infrastructure/web/controller/SettingsController.java b/core/src/main/java/com/loremind/infrastructure/web/controller/SettingsController.java
index dbd2cce..f70155d 100644
--- a/core/src/main/java/com/loremind/infrastructure/web/controller/SettingsController.java
+++ b/core/src/main/java/com/loremind/infrastructure/web/controller/SettingsController.java
@@ -140,6 +140,11 @@ public class SettingsController {
         return forward(HttpMethod.GET, "/models/onemin", null);
     }
 
+    @GetMapping("/models/openrouter")
+    public ResponseEntity<Map<String, Object>> listOpenRouterModels() {
+        return forward(HttpMethod.GET, "/models/openrouter", null);
+    }
+
     /**
      * Serialiseur JSON minimal pour eviter d'instancier ObjectMapper a chaque
      * appel. Suffisant pour notre cas d'usage : Map<String,Object> avec des
diff --git a/web/package-lock.json b/web/package-lock.json
index 1e74024..d3f2092 100644
--- a/web/package-lock.json
+++ b/web/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "loremind-web",
-  "version": "0.10.1-beta",
+  "version": "0.10.2-beta",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "loremind-web",
-      "version": "0.10.1-beta",
+      "version": "0.10.2-beta",
       "dependencies": {
         "@angular/animations": "^17.0.0",
         "@angular/common": "^17.0.0",
diff --git a/web/package.json b/web/package.json
index ca067c9..fc1d9cb 100644
--- a/web/package.json
+++ b/web/package.json
@@ -1,6 +1,6 @@
 {
   "name": "loremind-web",
-  "version": "0.10.1-beta",
+  "version": "0.10.2-beta",
   "description": "LoreMind Frontend - Angular",
   "scripts": {
     "ng": "ng",
diff --git a/web/src/app/campaigns/campaign-tree.helper.ts b/web/src/app/campaigns/campaign-tree.helper.ts
index 521cceb..a3c3bbb 100644
--- a/web/src/app/campaigns/campaign-tree.helper.ts
+++ b/web/src/app/campaigns/campaign-tree.helper.ts
@@ -127,6 +127,8 @@ export function buildCampaignTree(campaignId: string, data: CampaignTreeData): T
         id: `chapter-${ch.id}`,
         label: ch.name,
         iconKey: ch.icon ?? undefined,
+        // Cadenas si le chapitre porte des conditions de déblocage (hub ou linéaire).
+        meta: (ch.prerequisites?.length ?? 0) > 0 ? '🔒' : undefined,
         children: sceneItems,
         route: `/campaigns/${campaignId}/arcs/${arc.id}/chapters/${ch.id}`,
         createActions: [{
diff --git a/web/src/app/campaigns/chapter/chapter-edit/chapter-edit.component.html b/web/src/app/campaigns/chapter/chapter-edit/chapter-edit.component.html
index 038fcbe..62f9fed 100644
--- a/web/src/app/campaigns/chapter/chapter-edit/chapter-edit.component.html
+++ b/web/src/app/campaigns/chapter/chapter-edit/chapter-edit.component.html
@@ -26,13 +26,17 @@
 
   <form [formGroup]="form" (ngSubmit)="submit()" class="edit-form">
 
-    <!-- Section Hub : conditions de déblocage (scénario). Visible si l'arc parent est HUB. -->
-    <div class="hub-section" *ngIf="parentArc?.type === 'HUB'">
-      <h2 class="hub-section-title">🗺️ Conditions de déblocage de la quête</h2>
+    <!-- Conditions de déblocage (scénario) — pour TOUT chapitre : arc HUB (= quête)
+         comme arc linéaire (= chapitre conditionnel). Vide = disponible d'emblée. -->
+    <div class="hub-section">
+      <h2 class="hub-section-title">
+        {{ parentArc?.type === 'HUB' ? '🗺️ Conditions de déblocage de la quête' : '🔒 Conditions de déblocage du chapitre' }}
+      </h2>
       <small class="field-hint">
-        Définition du scénario : toutes les conditions doivent être remplies (ET) pour
-        que la quête soit débloquée dans une Partie. La progression en cours et l'état
-        des faits se gèrent dans l'écran de la Partie, pas ici.
+        Définition du scénario : toutes les conditions doivent être remplies (ET) pour que
+        {{ parentArc?.type === 'HUB' ? 'la quête' : 'ce chapitre' }} soit débloqué(e) dans une Partie.
+        Laissez vide pour qu'il soit disponible dès le départ. La progression et l'état des
+        faits se gèrent dans l'écran de la Partie, pas ici.
       </small>
       <app-prerequisite-editor
         [prerequisites]="prerequisites"
diff --git a/web/src/app/campaigns/chapter/chapter-view/chapter-view.component.html b/web/src/app/campaigns/chapter/chapter-view/chapter-view.component.html
index 98b1cb7..269bfb0 100644
--- a/web/src/app/campaigns/chapter/chapter-view/chapter-view.component.html
+++ b/web/src/app/campaigns/chapter/chapter-view/chapter-view.component.html
@@ -6,7 +6,14 @@
         <lucide-icon *ngIf="chapter.icon" [img]="resolveCampaignIcon(chapter.icon)" [size]="22" class="title-icon"></lucide-icon>
         {{ chapter.name }}
       </h1>
-      <p class="view-subtitle">{{ parentArc?.type === 'HUB' ? 'Quête (Hub)' : 'Chapitre' }}</p>
+      <p class="view-subtitle">
+        {{ parentArc?.type === 'HUB' ? 'Quête (Hub)' : 'Chapitre' }}
+        <span class="cond-badge" *ngIf="(chapter.prerequisites?.length ?? 0) > 0"
+              title="Ce chapitre a des conditions de déblocage : il se débloque en Partie quand elles sont remplies.">
+          <lucide-icon [img]="Lock" [size]="12"></lucide-icon>
+          Conditionnel
+        </span>
+      </p>
     </div>
     <div class="view-actions">
       <button type="button" class="btn-secondary" (click)="openGraph()"
@@ -25,8 +32,9 @@
     </div>
   </header>
 
-  <!-- Conditions de déblocage (donnée de scénario, read-only). Toujours visible si Arc HUB. -->
-  <section class="view-section" *ngIf="parentArc?.type === 'HUB'">
+  <!-- Conditions de déblocage (scénario, read-only). Visible pour un arc HUB (quête)
+       OU dès qu'un chapitre linéaire porte des conditions. -->
+  <section class="view-section" *ngIf="parentArc?.type === 'HUB' || (chapter.prerequisites?.length ?? 0) > 0">
     <h2 class="view-section-title"><span class="view-section-icon">🔒</span> Conditions de déblocage</h2>
 
     <ng-container *ngIf="(chapter.prerequisites?.length ?? 0) > 0; else noPrereqs">
@@ -34,8 +42,9 @@
         <li *ngFor="let p of chapter.prerequisites">{{ describePrerequisite(p) }}</li>
       </ul>
       <small class="view-section-empty">
-        Pendant une partie, la quête se débloque dès que toutes ces conditions sont remplies.
-        Le toggle des faits se fait dans l'écran « Faits » de la Partie.
+        Pendant une partie, {{ parentArc?.type === 'HUB' ? 'la quête' : 'ce chapitre' }} se débloque
+        dès que toutes ces conditions sont remplies. Le toggle des faits se fait dans l'écran
+        « Faits » de la Partie.
       </small>
     </ng-container>
 
diff --git a/web/src/app/campaigns/chapter/chapter-view/chapter-view.component.scss b/web/src/app/campaigns/chapter/chapter-view/chapter-view.component.scss
index 52aeeae..a364e96 100644
--- a/web/src/app/campaigns/chapter/chapter-view/chapter-view.component.scss
+++ b/web/src/app/campaigns/chapter/chapter-view/chapter-view.component.scss
@@ -1,5 +1,21 @@
 // Styles partagés via styles/_view.scss
 
+// Badge "Conditionnel" : chapitre porteur de conditions de déblocage.
+.cond-badge {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.25rem;
+  margin-left: 0.5rem;
+  padding: 0.1rem 0.5rem;
+  border-radius: 999px;
+  font-size: 0.72rem;
+  font-weight: 600;
+  vertical-align: middle;
+  color: #f0c674;
+  background: rgba(240, 198, 116, 0.12);
+  border: 1px solid rgba(240, 198, 116, 0.35);
+}
+
 .quest-status-bar {
   border: 1px solid rgba(66, 133, 244, 0.25);
   background: rgba(66, 133, 244, 0.04);
diff --git a/web/src/app/campaigns/chapter/chapter-view/chapter-view.component.ts b/web/src/app/campaigns/chapter/chapter-view/chapter-view.component.ts
index 97ee6ba..cd20a6e 100644
--- a/web/src/app/campaigns/chapter/chapter-view/chapter-view.component.ts
+++ b/web/src/app/campaigns/chapter/chapter-view/chapter-view.component.ts
@@ -3,7 +3,7 @@ import { CommonModule } from '@angular/common';
 import { ActivatedRoute, Router, RouterModule } from '@angular/router';
 import { forkJoin, of } from 'rxjs';
 import { switchMap } from 'rxjs/operators';
-import { LucideAngularModule, Pencil, Network, Trash2 } from 'lucide-angular';
+import { LucideAngularModule, Pencil, Network, Trash2, Lock } from 'lucide-angular';
 import { resolveCampaignIcon } from '../../campaign-icons';
 import { CampaignService } from '../../../services/campaign.service';
 import { CharacterService } from '../../../services/character.service';
@@ -32,6 +32,7 @@ export class ChapterViewComponent implements OnInit, OnDestroy {
   readonly Pencil = Pencil;
   readonly Network = Network;
   readonly Trash2 = Trash2;
+  readonly Lock = Lock;
   readonly resolveCampaignIcon = resolveCampaignIcon;
 
   campaignId = '';
diff --git a/web/src/app/services/settings.service.ts b/web/src/app/services/settings.service.ts
index 2637ba6..a79bda4 100644
--- a/web/src/app/services/settings.service.ts
+++ b/web/src/app/services/settings.service.ts
@@ -6,12 +6,16 @@ import { Observable } from 'rxjs';
  * Reflet de SettingsDTO cote Brain / SettingsController cote Core.
  * `onemin_api_key_set` indique si une cle est configuree, sans la reveler.
  */
+export type LlmProvider = 'ollama' | 'onemin' | 'openrouter';
+
 export interface AppSettings {
-  llm_provider: 'ollama' | 'onemin';
+  llm_provider: LlmProvider;
   ollama_base_url: string;
   llm_model: string;
   onemin_model: string;
   onemin_api_key_set: boolean;
+  openrouter_model: string;
+  openrouter_api_key_set: boolean;
   llm_num_ctx: number;
   /** Taille cible d'un morceau (tokens) pour l'import de PDF (règles/campagne). */
   import_chunk_tokens: number;
@@ -24,11 +28,13 @@ export interface AppSettings {
  * `onemin_api_key: ''` efface la cle, `null`/absent ne touche a rien.
  */
 export interface AppSettingsUpdate {
-  llm_provider?: 'ollama' | 'onemin';
+  llm_provider?: LlmProvider;
   ollama_base_url?: string;
   llm_model?: string;
   onemin_model?: string;
   onemin_api_key?: string;
+  openrouter_model?: string;
+  openrouter_api_key?: string;
   llm_num_ctx?: number;
   import_chunk_tokens?: number;
   llm_timeout_seconds?: number;
@@ -72,6 +78,11 @@ export class SettingsService {
     return this.http.get<{ groups: OneMinModelGroup[] }>(`${this.apiUrl}/models/onemin`, this.authOptions);
   }
 
+  /** Catalogue dynamique des modeles OpenRouter (depuis leur API publique). */
+  listOpenRouterModels(): Observable<{ models: OpenRouterModel[] }> {
+    return this.http.get<{ models: OpenRouterModel[] }>(`${this.apiUrl}/models/openrouter`, this.authOptions);
+  }
+
   /**
    * Telecharge un modele Ollama et streame la progression au client.
    *
@@ -184,3 +195,13 @@ export interface OneMinModelGroup {
   provider: string;
   models: string[];
 }
+
+/** Un modele OpenRouter (catalogue dynamique). */
+export interface OpenRouterModel {
+  id: string;
+  name: string;
+  /** Fenetre de contexte du modele (tokens). 0 si inconnue. */
+  context_length: number;
+  /** True si le modele est gratuit (id `:free` ou prix nul). */
+  free: boolean;
+}
diff --git a/web/src/app/settings/settings.component.html b/web/src/app/settings/settings.component.html
index cebc77f..fad0cf3 100644
--- a/web/src/app/settings/settings.component.html
+++ b/web/src/app/settings/settings.component.html
@@ -32,6 +32,10 @@
           <input type="radio" name="provider" value="onemin" [(ngModel)]="settings.llm_provider">
           <span>1min.ai (cloud)</span>
         </label>
+        <label class="radio">
+          <input type="radio" name="provider" value="openrouter" [(ngModel)]="settings.llm_provider">
+          <span>OpenRouter (cloud)</span>
+        </label>
       </div>
     </div>
   </section>
@@ -173,8 +177,45 @@
     </div>
   </section>
 
-  <!-- Bloc Fenetre de contexte -->
-  <section class="card" *ngIf="settings">
+  <!-- Bloc OpenRouter -->
+  <section class="card" *ngIf="settings && settings.llm_provider === 'openrouter'">
+    <h2>Configuration OpenRouter</h2>
+
+    <div class="form-row">
+      <label for="openrouter-key">Cle API</label>
+      <input
+        id="openrouter-key"
+        type="password"
+        [(ngModel)]="openrouterApiKeyInput"
+        [placeholder]="settings.openrouter_api_key_set ? 'Cle configuree (laisser vide pour ne pas changer)' : 'Saisir votre cle API (sk-or-...)'">
+      <label class="checkbox" *ngIf="settings.openrouter_api_key_set">
+        <input type="checkbox" [(ngModel)]="clearOpenrouterKey">
+        <span>Effacer la cle enregistree</span>
+      </label>
+    </div>
+
+    <div class="form-row">
+      <label for="openrouter-model">Modele</label>
+      <label class="checkbox">
+        <input type="checkbox" [(ngModel)]="openrouterFreeOnly">
+        <span>Gratuits seulement</span>
+      </label>
+      <select id="openrouter-model" [(ngModel)]="settings.openrouter_model">
+        <option *ngFor="let o of openrouterSelectOptions" [value]="o.id">{{ o.label }}</option>
+      </select>
+      <p class="hint">
+        Liste chargee automatiquement depuis OpenRouter. Pour rester <strong>gratuit</strong> :
+        un modele marque <code>· gratuit</code> ou le routeur <code>openrouter/free</code>
+        (choisit un modele gratuit tout seul). Pour les imports, prefere un gratuit a
+        <strong>grand contexte</strong> (valeur « ctx »).
+      </p>
+    </div>
+  </section>
+
+  <!-- Bloc Fenetre de contexte : seulement pour Ollama (num_ctx est un vrai
+       parametre du modele local). Pour le cloud (1min/OpenRouter), on ne fixe rien :
+       on utilise ce que le modele accepte, et la jauge du chat s'affiche sans max. -->
+  <section class="card" *ngIf="settings && settings.llm_provider === 'ollama'">
     <h2>Fenetre de contexte</h2>
 
     <!-- Ollama : slider borne par le max du modele -->
@@ -205,20 +246,6 @@
       </p>
     </div>
 
-    <!-- 1min.ai : saisie libre (pas d'introspection possible) -->
-    <div class="form-row" *ngIf="settings.llm_provider === 'onemin'">
-      <label for="llm-num-ctx-onemin">Fenetre de contexte (tokens)</label>
-      <input
-        id="llm-num-ctx-onemin"
-        type="number"
-        min="2048"
-        step="1024"
-        [(ngModel)]="settings.llm_num_ctx">
-      <p class="hint">
-        A regler selon la capacite du modele 1min.ai choisi (ex: 128 000 pour gpt-4o,
-        200 000 pour claude-sonnet). Sert de plafond a la jauge de contexte du chat.
-      </p>
-    </div>
   </section>
 
   <!-- Bloc Import de PDF -->
diff --git a/web/src/app/settings/settings.component.ts b/web/src/app/settings/settings.component.ts
index d525fb7..63b5cdb 100644
--- a/web/src/app/settings/settings.component.ts
+++ b/web/src/app/settings/settings.component.ts
@@ -4,7 +4,7 @@ import { CommonModule } from '@angular/common';
 import { FormsModule } from '@angular/forms';
 import { Router } from '@angular/router';
 import { LucideAngularModule, ArrowLeft, RefreshCw, Save, Check, AlertCircle, Download, Trash2, Plus, X, Heart, Link2, Unlink } from 'lucide-angular';
-import { SettingsService, AppSettings, AppSettingsUpdate, OneMinModelGroup, OllamaPullEvent } from '../services/settings.service';
+import { SettingsService, AppSettings, AppSettingsUpdate, OneMinModelGroup, OpenRouterModel, OllamaPullEvent } from '../services/settings.service';
 import { UpdatesService, UpdateStatus } from '../services/updates.service';
 import { ConfigService } from '../services/config.service';
 import { LayoutService } from '../services/layout.service';
@@ -103,6 +103,10 @@ export class SettingsComponent implements OnInit, OnDestroy {
   settings: AppSettings | null = null;
   ollamaModels: string[] = [];
   oneminGroups: OneMinModelGroup[] = [];
+
+  /** Catalogue OpenRouter (chargé dynamiquement) + filtre "gratuits seulement". */
+  openrouterModels: OpenRouterModel[] = [];
+  openrouterFreeOnly = true;
   /** Fournisseur 1min.ai actuellement selectionne (filtre la liste des modeles). */
   oneminProvider: string = '';
 
@@ -128,6 +132,11 @@ export class SettingsComponent implements OnInit, OnDestroy {
   /** True si l'utilisateur a coche "effacer la cle". */
   clearApiKey = false;
 
+  /** Cle OpenRouter saisie — vide = on ne touche pas a la cle persistee. */
+  openrouterApiKeyInput = '';
+  /** True si l'utilisateur a coche "effacer la cle OpenRouter". */
+  clearOpenrouterKey = false;
+
   constructor(
     private settingsService: SettingsService,
     private router: Router,
@@ -457,6 +466,35 @@ export class SettingsComponent implements OnInit, OnDestroy {
       },
       error: () => this.oneminGroups = []
     });
+
+    this.settingsService.listOpenRouterModels().subscribe({
+      next: (r) => this.openrouterModels = r.models,
+      error: () => this.openrouterModels = []
+    });
+  }
+
+  /** Modeles OpenRouter, filtres (gratuits seulement par defaut). */
+  get filteredOpenrouterModels(): OpenRouterModel[] {
+    return this.openrouterFreeOnly
+      ? this.openrouterModels.filter(m => m.free)
+      : this.openrouterModels;
+  }
+
+  /** Options du select OpenRouter : routeur auto + liste filtree + valeur courante. */
+  get openrouterSelectOptions(): { id: string; label: string }[] {
+    const options: { id: string; label: string }[] = [
+      { id: 'openrouter/free', label: 'openrouter/free — routeur auto (gratuit)' }
+    ];
+    for (const m of this.filteredOpenrouterModels) {
+      const ctx = m.context_length ? ` — ${m.context_length.toLocaleString()} ctx` : '';
+      options.push({ id: m.id, label: `${m.id}${ctx}${m.free ? ' · gratuit' : ''}` });
+    }
+    // Garantit que le modele actuellement configure reste selectionnable.
+    const cur = this.settings?.openrouter_model;
+    if (cur && !options.some(o => o.id === cur)) {
+      options.splice(1, 0, { id: cur, label: `${cur} (actuel)` });
+    }
+    return options;
   }
 
   /** Deduit le fournisseur a partir du modele actuellement configure. */
@@ -518,6 +556,7 @@ export class SettingsComponent implements OnInit, OnDestroy {
       ollama_base_url: this.settings.ollama_base_url,
       llm_model: this.settings.llm_model,
       onemin_model: this.settings.onemin_model,
+      openrouter_model: this.settings.openrouter_model,
       llm_num_ctx: this.settings.llm_num_ctx,
       import_chunk_tokens: this.settings.import_chunk_tokens,
       llm_timeout_seconds: this.settings.llm_timeout_seconds
@@ -527,12 +566,19 @@ export class SettingsComponent implements OnInit, OnDestroy {
     } else if (this.oneminApiKeyInput.trim()) {
       patch.onemin_api_key = this.oneminApiKeyInput.trim();
     }
+    if (this.clearOpenrouterKey) {
+      patch.openrouter_api_key = '';
+    } else if (this.openrouterApiKeyInput.trim()) {
+      patch.openrouter_api_key = this.openrouterApiKeyInput.trim();
+    }
 
     this.settingsService.updateSettings(patch).subscribe({
       next: (s) => {
         this.settings = { ...s };
         this.oneminApiKeyInput = '';
         this.clearApiKey = false;
+        this.openrouterApiKeyInput = '';
+        this.clearOpenrouterKey = false;
         this.successMessage = 'Parametres sauvegardes.';
         this.saving = false;
       },
diff --git a/web/src/app/shared/ai-chat-drawer/ai-chat-drawer.component.html b/web/src/app/shared/ai-chat-drawer/ai-chat-drawer.component.html
index 606a3c5..9d39af8 100644
--- a/web/src/app/shared/ai-chat-drawer/ai-chat-drawer.component.html
+++ b/web/src/app/shared/ai-chat-drawer/ai-chat-drawer.component.html
@@ -97,13 +97,14 @@
     </header>
 
     <div class="context-gauge" *ngIf="usage" [attr.data-level]="usageLevel"
-         [attr.title]="'System: ' + usage.system + ' · Historique: ' + usage.history + ' · Courant: ' + usage.current + ' / ' + usage.max + ' tokens'">
-      <div class="gauge-bar">
+         [attr.title]="'System: ' + usage.system + ' · Historique: ' + usage.history + ' · Courant: ' + usage.current + (usageHasMax ? ' / ' + usage.max : '') + ' tokens'">
+      <!-- Barre seulement si on connaît le plafond (Ollama). Cloud : compteur seul. -->
+      <div class="gauge-bar" *ngIf="usageHasMax">
         <div class="gauge-fill" [style.width.%]="usagePercent"></div>
       </div>
       <div class="gauge-label">
-        <span class="gauge-text">Contexte : {{ usageTotal }} / {{ usage.max }} tokens</span>
-        <span class="gauge-percent">{{ usagePercent }}%</span>
+        <span class="gauge-text">Contexte : {{ usageTotal }}<ng-container *ngIf="usageHasMax"> / {{ usage.max }}</ng-container> tokens</span>
+        <span class="gauge-percent" *ngIf="usageHasMax">{{ usagePercent }}%</span>
       </div>
     </div>
 
diff --git a/web/src/app/shared/ai-chat-drawer/ai-chat-drawer.component.ts b/web/src/app/shared/ai-chat-drawer/ai-chat-drawer.component.ts
index 42a8d4a..1b615c8 100644
--- a/web/src/app/shared/ai-chat-drawer/ai-chat-drawer.component.ts
+++ b/web/src/app/shared/ai-chat-drawer/ai-chat-drawer.component.ts
@@ -129,6 +129,10 @@ export class AiChatDrawerComponent implements OnInit, OnChanges, OnDestroy {
     if (!this.usage) return 0;
     return this.usage.system + this.usage.history + this.usage.current;
   }
+  /** Vrai si on connaît la fenêtre max (Ollama) → affiche dénominateur + barre. */
+  get usageHasMax(): boolean {
+    return !!this.usage && this.usage.max > 0;
+  }
   get usageRatio(): number {
     if (!this.usage || this.usage.max <= 0) return 0;
     return Math.min(1, this.usageTotal / this.usage.max);