diff --git a/core/src/test/java/com/loremind/infrastructure/ai/BrainAiChatClientTest.java b/core/src/test/java/com/loremind/infrastructure/ai/BrainAiChatClientTest.java
new file mode 100644
index 0000000..ae64793
--- /dev/null
+++ b/core/src/test/java/com/loremind/infrastructure/ai/BrainAiChatClientTest.java
@@ -0,0 +1,180 @@
+package com.loremind.infrastructure.ai;
+
+import com.loremind.domain.generationcontext.ChatRequest;
+import com.loremind.domain.generationcontext.ChatUsage;
+import com.loremind.domain.generationcontext.ports.AiProviderException;
+import org.junit.jupiter.api.Test;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.web.reactive.function.client.ClientResponse;
+import org.springframework.web.reactive.function.client.ExchangeFunction;
+import org.springframework.web.reactive.function.client.WebClient;
+import reactor.core.publisher.Mono;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicReference;
+import java.util.function.Consumer;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+/**
+ * Tests unitaires purs (JUnit 5 + Mockito, sans Spring, sans réseau) de
+ * {@link BrainAiChatClient}.
+ *
+ * Principe : WebClient.Builder préconfiguré avec une ExchangeFunction mock
+ * renvoyant un flux SSE canned. Le payloadBuilder est mocké ; le sseParser est
+ * une instance réelle (simple parseur sans dépendance).
+ */
+class BrainAiChatClientTest {
+
+    /** ChatRequest minimal valide : messages vide suffit (payloadBuilder mocké). */
+    private ChatRequest minimalRequest() {
+        return ChatRequest.builder().messages(List.of()).build();
+    }
+
+    /** Construit un client dont le WebClient renvoie le corps SSE fourni. */
+    private BrainAiChatClient clientWithSse(String sseBody) {
+        ExchangeFunction ef = req -> Mono.just(
+                ClientResponse.create(HttpStatus.OK)
+                        .header(HttpHeaders.CONTENT_TYPE, MediaType.TEXT_EVENT_STREAM_VALUE)
+                        .body(sseBody)
+                        .build());
+        return buildClient(ef);
+    }
+
+    /** Construit un client dont le WebClient émet une erreur transport. */
+    private BrainAiChatClient clientErroring() {
+        ExchangeFunction ef = req -> Mono.error(new RuntimeException("boom"));
+        return buildClient(ef);
+    }
+
+    private BrainAiChatClient buildClient(ExchangeFunction ef) {
+        WebClient.Builder builder = WebClient.builder().exchangeFunction(ef);
+        BrainChatPayloadBuilder payloadBuilder = mock(BrainChatPayloadBuilder.class);
+        when(payloadBuilder.build(org.mockito.ArgumentMatchers.any())).thenReturn(Map.of());
+        return new BrainAiChatClient(builder, "http://brain", payloadBuilder, new BrainSseParser());
+    }
+
+    // --- Collecteurs partagés pour les callbacks ---
+    private final List<ChatUsage> usages = new ArrayList<>();
+    private final List<String> tokens = new ArrayList<>();
+    private final AtomicBoolean completed = new AtomicBoolean(false);
+    private final AtomicReference<Throwable> error = new AtomicReference<>();
+
+    private final Consumer<ChatUsage> onUsage = usages::add;
+    private final Consumer<String> onToken = tokens::add;
+    private final Runnable onComplete = () -> completed.set(true);
+    private final Consumer<Throwable> onError = error::set;
+
+    @Test
+    void flux_complet_parse_usage_et_token_puis_complete() {
+        String sse =
+                "event:usage\ndata:{\"system\":1,\"history\":2,\"current\":3,\"max\":100}\n\n" +
+                "data:{\"token\":\"Bonjour\"}\n\n" +
+                "event:done\ndata:{}\n\n";
+        BrainAiChatClient client = clientWithSse(sse);
+
+        client.streamChat(minimalRequest(), onUsage, onToken, onComplete, onError);
+
+        // usage parsé et propagé
+        assertThat(usages).hasSize(1);
+        assertThat(usages.get(0)).isEqualTo(new ChatUsage(1, 2, 3, 100));
+        // token propagé
+        assertThat(tokens).containsExactly("Bonjour");
+        // event done ignoré (pas de token/usage supplémentaire)
+        // complétion appelée, pas d'erreur
+        assertThat(completed).isTrue();
+        assertThat(error.get()).isNull();
+    }
+
+    @Test
+    void plusieurs_tokens_propages_dans_l_ordre() {
+        String sse =
+                "data:{\"token\":\"Bon\"}\n\n" +
+                "data:{\"token\":\"jour\"}\n\n" +
+                "event:done\ndata:{}\n\n";
+        BrainAiChatClient client = clientWithSse(sse);
+
+        client.streamChat(minimalRequest(), onUsage, onToken, onComplete, onError);
+
+        assertThat(tokens).containsExactly("Bon", "jour");
+        assertThat(completed).isTrue();
+        assertThat(error.get()).isNull();
+    }
+
+    @Test
+    void event_error_declenche_onError_avec_AiProviderException() {
+        String sse =
+                "event:error\ndata:boom\n\n" +
+                "event:done\ndata:{}\n\n";
+        BrainAiChatClient client = clientWithSse(sse);
+
+        client.streamChat(minimalRequest(), onUsage, onToken, onComplete, onError);
+
+        assertThat(error.get())
+                .isInstanceOf(AiProviderException.class)
+                .hasMessageContaining("boom");
+        // Aucun token émis sur ce flux.
+        assertThat(tokens).isEmpty();
+    }
+
+    @Test
+    void token_vide_n_est_pas_propage() {
+        String sse =
+                "data:{\"token\":\"\"}\n\n" +
+                "event:done\ndata:{}\n\n";
+        BrainAiChatClient client = clientWithSse(sse);
+
+        client.streamChat(minimalRequest(), onUsage, onToken, onComplete, onError);
+
+        assertThat(tokens).isEmpty();
+        assertThat(completed).isTrue();
+    }
+
+    @Test
+    void usage_illisible_n_est_pas_propage() {
+        // data usage sans champs numériques -> parser renvoie ChatUsage(0,0,0,0),
+        // donc propagé ; ici on teste un usage avec data non-null mais vide d'entiers.
+        String sse =
+                "event:usage\ndata:{\"system\":5}\n\n" +
+                "event:done\ndata:{}\n\n";
+        BrainAiChatClient client = clientWithSse(sse);
+
+        client.streamChat(minimalRequest(), onUsage, onToken, onComplete, onError);
+
+        // Les champs absents tombent à 0 (parser tolérant).
+        assertThat(usages).containsExactly(new ChatUsage(5, 0, 0, 0));
+    }
+
+    @Test
+    void erreur_transport_declenche_onError_avec_AiProviderException() {
+        BrainAiChatClient client = clientErroring();
+
+        client.streamChat(minimalRequest(), onUsage, onToken, onComplete, onError);
+
+        assertThat(error.get())
+                .isInstanceOf(AiProviderException.class)
+                .hasMessageContaining("streaming chat");
+        // onComplete NON appelé puisqu'une exception a interrompu blockLast().
+        assertThat(completed).isFalse();
+    }
+
+    @Test
+    void flux_vide_appelle_seulement_onComplete() {
+        // Flux SSE vide : aucun évènement, blockLast renvoie null, onComplete appelé.
+        BrainAiChatClient client = clientWithSse("");
+
+        client.streamChat(minimalRequest(), onUsage, onToken, onComplete, onError);
+
+        assertThat(tokens).isEmpty();
+        assertThat(usages).isEmpty();
+        assertThat(completed).isTrue();
+        assertThat(error.get()).isNull();
+    }
+}
diff --git a/core/src/test/java/com/loremind/infrastructure/ai/BrainAiClientTest.java b/core/src/test/java/com/loremind/infrastructure/ai/BrainAiClientTest.java
new file mode 100644
index 0000000..1824056
--- /dev/null
+++ b/core/src/test/java/com/loremind/infrastructure/ai/BrainAiClientTest.java
@@ -0,0 +1,213 @@
+package com.loremind.infrastructure.ai;
+
+import com.loremind.domain.generationcontext.GenerationContext;
+import com.loremind.domain.generationcontext.GenerationResult;
+import com.loremind.domain.generationcontext.ports.AiProviderException;
+import org.junit.jupiter.api.Test;
+import org.mockito.ArgumentCaptor;
+import org.springframework.http.HttpEntity;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.web.client.HttpServerErrorException;
+import org.springframework.web.client.ResourceAccessException;
+import org.springframework.web.client.RestTemplate;
+
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertSame;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+/**
+ * Tests unitaires PURS (JUnit 5 + Mockito, sans Spring, sans reseau) pour
+ * BrainAiClient. Le RestTemplate est mocke ; on couvre toutes les branches
+ * de callBrain ainsi que la traduction domaine -> wire -> domaine.
+ */
+class BrainAiClientTest {
+
+    private static final String BASE_URL = "http://brain";
+    private static final String EXPECTED_URL = "http://brain/generate-page";
+
+    private GenerationContext sampleContext() {
+        return new GenerationContext(
+                "Aetheria",
+                "Un monde de cendres",
+                "PNJ",
+                "Fiche personnage",
+                List.of("histoire", "motto"),
+                "Garde rouge"
+        );
+    }
+
+    private BrainGeneratePageResponse responseWith(Map<String, String> values) {
+        BrainGeneratePageResponse r = new BrainGeneratePageResponse();
+        r.setValues(values);
+        return r;
+    }
+
+    // --- Branche succes ------------------------------------------------------
+
+    @Test
+    void generatePage_succes_traduitReponseWireEnResultatDomaine() {
+        RestTemplate rt = mock(RestTemplate.class);
+        BrainAiClient client = new BrainAiClient(rt, BASE_URL);
+
+        BrainGeneratePageResponse wire = responseWith(Map.of(
+                "histoire", "Nee sous une etoile rouge",
+                "motto", "Jamais genou en terre"
+        ));
+        when(rt.postForObject(anyString(), any(), eq(BrainGeneratePageResponse.class)))
+                .thenReturn(wire);
+
+        GenerationResult result = client.generatePage(sampleContext());
+
+        assertEquals(2, result.values().size());
+        assertEquals("Jamais genou en terre", result.values().get("motto"));
+    }
+
+    @Test
+    void generatePage_appelleBonneUrlEtContentTypeJson_avecCorpsTraduit() {
+        RestTemplate rt = mock(RestTemplate.class);
+        BrainAiClient client = new BrainAiClient(rt, BASE_URL);
+
+        when(rt.postForObject(anyString(), any(), eq(BrainGeneratePageResponse.class)))
+                .thenReturn(responseWith(Map.of("histoire", "v")));
+
+        client.generatePage(sampleContext());
+
+        // Capture de l'URL et de l'HttpEntity envoyes au RestTemplate
+        ArgumentCaptor<String> urlCaptor = ArgumentCaptor.forClass(String.class);
+        @SuppressWarnings("unchecked")
+        ArgumentCaptor<HttpEntity<BrainGeneratePageRequest>> entityCaptor =
+                ArgumentCaptor.forClass(HttpEntity.class);
+
+        org.mockito.Mockito.verify(rt).postForObject(
+                urlCaptor.capture(),
+                entityCaptor.capture(),
+                eq(BrainGeneratePageResponse.class));
+
+        assertEquals(EXPECTED_URL, urlCaptor.getValue());
+
+        HttpEntity<BrainGeneratePageRequest> entity = entityCaptor.getValue();
+        HttpHeaders headers = entity.getHeaders();
+        assertEquals(MediaType.APPLICATION_JSON, headers.getContentType());
+
+        // Verifie la traduction domaine -> wire (exerce les getters du record)
+        BrainGeneratePageRequest body = entity.getBody();
+        assertEquals("Aetheria", body.loreName());
+        assertEquals("Un monde de cendres", body.loreDescription());
+        assertEquals("PNJ", body.folderName());
+        assertEquals("Fiche personnage", body.templateName());
+        assertEquals(List.of("histoire", "motto"), body.templateFields());
+        assertEquals("Garde rouge", body.pageTitle());
+    }
+
+    // --- Branche reponse null ------------------------------------------------
+
+    @Test
+    void generatePage_reponseNull_leveAiProviderException() {
+        RestTemplate rt = mock(RestTemplate.class);
+        BrainAiClient client = new BrainAiClient(rt, BASE_URL);
+
+        when(rt.postForObject(anyString(), any(), eq(BrainGeneratePageResponse.class)))
+                .thenReturn(null);
+
+        AiProviderException ex = assertThrows(AiProviderException.class,
+                () -> client.generatePage(sampleContext()));
+        assertTrue(ex.getMessage().contains("reponse vide")
+                || ex.getMessage().contains("réponse vide"));
+    }
+
+    // --- Branche values null -------------------------------------------------
+
+    @Test
+    void generatePage_valuesNull_leveAiProviderException() {
+        RestTemplate rt = mock(RestTemplate.class);
+        BrainAiClient client = new BrainAiClient(rt, BASE_URL);
+
+        // Reponse non null mais avec values == null
+        when(rt.postForObject(anyString(), any(), eq(BrainGeneratePageResponse.class)))
+                .thenReturn(responseWith(null));
+
+        assertThrows(AiProviderException.class,
+                () -> client.generatePage(sampleContext()));
+    }
+
+    // --- Branche ResourceAccessException (Brain injoignable) -----------------
+
+    @Test
+    void generatePage_brainInjoignable_leveAiProviderException() {
+        RestTemplate rt = mock(RestTemplate.class);
+        BrainAiClient client = new BrainAiClient(rt, BASE_URL);
+
+        ResourceAccessException cause = new ResourceAccessException("down");
+        when(rt.postForObject(anyString(), any(), eq(BrainGeneratePageResponse.class)))
+                .thenThrow(cause);
+
+        AiProviderException ex = assertThrows(AiProviderException.class,
+                () -> client.generatePage(sampleContext()));
+        assertTrue(ex.getMessage().contains("injoignable"));
+        assertSame(cause, ex.getCause());
+    }
+
+    // --- Branche RestClientResponseException (HTTP 4xx/5xx) ------------------
+
+    @Test
+    void generatePage_erreurHttp_leveAiProviderExceptionAvecCode() {
+        RestTemplate rt = mock(RestTemplate.class);
+        BrainAiClient client = new BrainAiClient(rt, BASE_URL);
+
+        HttpServerErrorException cause = HttpServerErrorException.create(
+                HttpStatus.BAD_GATEWAY, "Bad Gateway",
+                new HttpHeaders(), new byte[0], null);
+        when(rt.postForObject(anyString(), any(), eq(BrainGeneratePageResponse.class)))
+                .thenThrow(cause);
+
+        AiProviderException ex = assertThrows(AiProviderException.class,
+                () -> client.generatePage(sampleContext()));
+        assertTrue(ex.getMessage().contains("502"));
+        assertSame(cause, ex.getCause());
+    }
+
+    // --- Branche AiProviderException deja traduite : re-levee telle quelle ---
+
+    @Test
+    void generatePage_aiProviderExceptionDejaTraduite_estRelancee() {
+        RestTemplate rt = mock(RestTemplate.class);
+        BrainAiClient client = new BrainAiClient(rt, BASE_URL);
+
+        AiProviderException original = new AiProviderException("deja traduite");
+        when(rt.postForObject(anyString(), any(), eq(BrainGeneratePageResponse.class)))
+                .thenThrow(original);
+
+        AiProviderException ex = assertThrows(AiProviderException.class,
+                () -> client.generatePage(sampleContext()));
+        // Pas de re-enveloppement : c'est exactement la meme instance
+        assertSame(original, ex);
+    }
+
+    // --- Branche Exception generique (filet de securite) ---------------------
+
+    @Test
+    void generatePage_exceptionGenerique_leveAiProviderException() {
+        RestTemplate rt = mock(RestTemplate.class);
+        BrainAiClient client = new BrainAiClient(rt, BASE_URL);
+
+        RuntimeException cause = new IllegalStateException("JSON invalide");
+        when(rt.postForObject(anyString(), any(), eq(BrainGeneratePageResponse.class)))
+                .thenThrow(cause);
+
+        AiProviderException ex = assertThrows(AiProviderException.class,
+                () -> client.generatePage(sampleContext()));
+        assertTrue(ex.getMessage().contains("inattendue"));
+        assertSame(cause, ex.getCause());
+    }
+}
diff --git a/core/src/test/java/com/loremind/infrastructure/ai/BrainCampaignAdaptClientTest.java b/core/src/test/java/com/loremind/infrastructure/ai/BrainCampaignAdaptClientTest.java
new file mode 100644
index 0000000..5c67977
--- /dev/null
+++ b/core/src/test/java/com/loremind/infrastructure/ai/BrainCampaignAdaptClientTest.java
@@ -0,0 +1,166 @@
+package com.loremind.infrastructure.ai;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.jupiter.api.Test;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.web.reactive.function.client.ClientResponse;
+import org.springframework.web.reactive.function.client.ExchangeFunction;
+import org.springframework.web.reactive.function.client.WebClient;
+import reactor.core.publisher.Mono;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicReference;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * Tests unitaires PURS (JUnit 5, sans Spring ni réseau) pour {@link BrainCampaignAdaptClient}.
+ * Le WebClient.Builder injecté embarque une ExchangeFunction qui renvoie un corps SSE canned.
+ */
+class BrainCampaignAdaptClientTest {
+
+    private static final ObjectMapper MAPPER = new ObjectMapper();
+
+    private BrainCampaignAdaptClient clientReturning(String sseBody) {
+        ExchangeFunction ef = req -> Mono.just(
+                ClientResponse.create(HttpStatus.OK)
+                        .header(HttpHeaders.CONTENT_TYPE, MediaType.TEXT_EVENT_STREAM_VALUE)
+                        .body(sseBody)
+                        .build());
+        WebClient.Builder builder = WebClient.builder().exchangeFunction(ef);
+        return new BrainCampaignAdaptClient(builder, MAPPER, "http://brain", 30);
+    }
+
+    private BrainCampaignAdaptClient clientFailingWith(Throwable boom) {
+        ExchangeFunction ef = req -> Mono.error(boom);
+        WebClient.Builder builder = WebClient.builder().exchangeFunction(ef);
+        return new BrainCampaignAdaptClient(builder, MAPPER, "http://brain", 30);
+    }
+
+    /** Collecteur de callbacks + déclenchement de adviseStreaming. */
+    private static final class Collector {
+        final StringBuilder tokens = new StringBuilder();
+        final AtomicBoolean complete = new AtomicBoolean(false);
+        final AtomicReference<Throwable> error = new AtomicReference<>();
+
+        void invoke(BrainCampaignAdaptClient client, String filename, String brief, String messagesJson) {
+            client.adviseStreaming(
+                    new byte[]{1, 2, 3},
+                    filename,
+                    brief,
+                    messagesJson,
+                    tokens::append,
+                    () -> complete.set(true),
+                    error::set);
+        }
+
+        void invoke(BrainCampaignAdaptClient client) {
+            invoke(client, "camp.pdf", "brief", "[]");
+        }
+    }
+
+    @Test
+    void streame_tokens_puis_done() {
+        String sse =
+                "event:token\ndata:{\"token\":\"Conseil\"}\n\n" +
+                "event:token\ndata:{\"token\":\" final\"}\n\n" +
+                "event:done\ndata:{}\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        assertEquals("Conseil final", c.tokens.toString());
+        assertTrue(c.complete.get(), "onComplete appelé via event done");
+        assertNull(c.error.get());
+    }
+
+    @Test
+    void token_vide_ou_absent_ignore() {
+        // token "" -> non émis ; champ token absent -> readField renvoie data (non vide)
+        // donc émis tel quel : on vérifie ce comportement réel.
+        String sse =
+                "event:token\ndata:{\"token\":\"\"}\n\n" +
+                "event:token\ndata:{\"token\":\"OK\"}\n\n" +
+                "event:done\ndata:{}\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        assertEquals("OK", c.tokens.toString());
+        assertTrue(c.complete.get());
+    }
+
+    @Test
+    void event_error_appelle_onError_avec_runtimeexception() {
+        String sse =
+                "event:token\ndata:{\"token\":\"avant\"}\n\n" +
+                "event:error\ndata:{\"message\":\"PDF illisible\"}\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        assertNotNull(c.error.get());
+        assertInstanceOf(RuntimeException.class, c.error.get());
+        assertTrue(c.error.get().getMessage().contains("PDF illisible"));
+        assertFalse(c.complete.get(), "onComplete non appelé après error terminal");
+    }
+
+    @Test
+    void event_error_data_non_json_relaie_data_brut() {
+        // readField : data non parsable -> catch -> renvoie data brut.
+        String sse = "event:error\ndata:panne-brute\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        assertNotNull(c.error.get());
+        assertTrue(c.error.get().getMessage().contains("panne-brute"));
+    }
+
+    @Test
+    void flux_clos_sans_done_appelle_onComplete() {
+        // Pas de done/error -> terminated false -> onComplete de secours.
+        String sse = "event:token\ndata:{\"token\":\"x\"}\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        assertEquals("x", c.tokens.toString());
+        assertTrue(c.complete.get());
+        assertNull(c.error.get());
+    }
+
+    @Test
+    void erreur_transport_traduite_en_runtimeexception() {
+        Collector c = new Collector();
+        c.invoke(clientFailingWith(new RuntimeException("boom")));
+
+        assertNotNull(c.error.get());
+        assertInstanceOf(RuntimeException.class, c.error.get());
+        assertTrue(c.error.get().getMessage().contains("adaptation"));
+        assertFalse(c.complete.get());
+    }
+
+    @Test
+    void filename_null_et_brief_null_et_messages_null_acceptes() {
+        // Couvre les branches : filename blank -> "campaign.pdf", brief null -> "",
+        // messagesJson null/blank -> "[]".
+        String sse = "event:done\ndata:{}\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse), null, null, null);
+
+        assertTrue(c.complete.get());
+        assertNull(c.error.get());
+    }
+
+    @Test
+    void messages_blank_remplace_par_tableau_vide() {
+        String sse = "event:done\ndata:{}\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse), "  ", "  ", "   ");
+
+        assertTrue(c.complete.get());
+    }
+}
diff --git a/core/src/test/java/com/loremind/infrastructure/ai/BrainCampaignImportClientTest.java b/core/src/test/java/com/loremind/infrastructure/ai/BrainCampaignImportClientTest.java
new file mode 100644
index 0000000..675591b
--- /dev/null
+++ b/core/src/test/java/com/loremind/infrastructure/ai/BrainCampaignImportClientTest.java
@@ -0,0 +1,429 @@
+package com.loremind.infrastructure.ai;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.loremind.domain.campaigncontext.CampaignImportProgress;
+import com.loremind.domain.campaigncontext.CampaignImportProposal;
+import com.loremind.domain.campaigncontext.ports.CampaignImportException;
+import org.junit.jupiter.api.Test;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.web.reactive.function.client.ClientResponse;
+import org.springframework.web.reactive.function.client.ExchangeFunction;
+import org.springframework.web.reactive.function.client.WebClient;
+import reactor.core.publisher.Mono;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicReference;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * Tests unitaires PURS (JUnit 5, sans Spring ni réseau) pour {@link BrainCampaignImportClient}.
+ * <p>
+ * NB : contrairement à la consigne initiale, ce client est entièrement WebClient + SSE
+ * (POST /import/campaign/stream) — il n'y a PAS de RestTemplate ni d'appel one-shot.
+ * On injecte donc un WebClient.Builder dont l'ExchangeFunction renvoie un corps SSE
+ * canned (ou échoue), ce qui couvre {@code handleEvent} et tous les helpers de parsing.
+ */
+class BrainCampaignImportClientTest {
+
+    private static final ObjectMapper MAPPER = new ObjectMapper();
+
+    /** Construit un client dont le WebClient renvoie le corps SSE fourni. */
+    private BrainCampaignImportClient clientReturning(String sseBody) {
+        ExchangeFunction ef = req -> Mono.just(
+                ClientResponse.create(HttpStatus.OK)
+                        .header(HttpHeaders.CONTENT_TYPE, MediaType.TEXT_EVENT_STREAM_VALUE)
+                        .body(sseBody)
+                        .build());
+        WebClient.Builder builder = WebClient.builder().exchangeFunction(ef);
+        return new BrainCampaignImportClient(builder, MAPPER, "http://brain", 30);
+    }
+
+    /** Construit un client dont le transport échoue immédiatement (Mono.error). */
+    private BrainCampaignImportClient clientFailingWith(Throwable boom) {
+        ExchangeFunction ef = req -> Mono.error(boom);
+        WebClient.Builder builder = WebClient.builder().exchangeFunction(ef);
+        return new BrainCampaignImportClient(builder, MAPPER, "http://brain", 30);
+    }
+
+    /** Collecteur mutable réunissant tous les callbacks de l'import streamé. */
+    private static final class Collector {
+        final List<CampaignImportProgress> progresses = new ArrayList<>();
+        final AtomicInteger heartbeats = new AtomicInteger(0);
+        final List<String> statuses = new ArrayList<>();
+        final AtomicReference<CampaignImportProposal> done = new AtomicReference<>();
+        final AtomicReference<Throwable> error = new AtomicReference<>();
+
+        void invoke(BrainCampaignImportClient client) {
+            invoke(client, "campaign.pdf");
+        }
+
+        void invoke(BrainCampaignImportClient client, String filename) {
+            client.importCampaignStreaming(
+                    new byte[]{1, 2, 3},
+                    filename,
+                    progresses::add,
+                    heartbeats::incrementAndGet,
+                    statuses::add,
+                    done::set,
+                    error::set);
+        }
+    }
+
+    // ---------- flux nominal : start -> progress -> done --------------------
+
+    @Test
+    void streame_start_progress_done_construit_la_proposition() {
+        // SSE déclenchant start (page/ocr counts), progress (compteurs), puis done (arbre complet).
+        String sse =
+                "event:start\ndata:{\"total\":5,\"page_count\":12,\"ocr_page_count\":3}\n\n" +
+                "event:progress\ndata:{\"current\":2,\"total\":5,\"arc_count\":1,\"chapter_count\":2,\"scene_count\":4,\"npc_count\":6}\n\n" +
+                "event:done\ndata:" + doneJson() + "\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        // start : current=0, total=5, pageCount=12, ocrPageCount=3, reste 0.
+        assertEquals(2, c.progresses.size());
+        CampaignImportProgress start = c.progresses.get(0);
+        assertEquals(0, start.current());
+        assertEquals(5, start.total());
+        assertEquals(12, start.pageCount());
+        assertEquals(3, start.ocrPageCount());
+
+        // progress : compteurs propagés + pageCount/ocr mémorisés depuis start.
+        CampaignImportProgress prog = c.progresses.get(1);
+        assertEquals(2, prog.current());
+        assertEquals(5, prog.total());
+        assertEquals(12, prog.pageCount());
+        assertEquals(3, prog.ocrPageCount());
+        assertEquals(1, prog.arcCount());
+        assertEquals(2, prog.chapterCount());
+        assertEquals(4, prog.sceneCount());
+        assertEquals(6, prog.npcCount());
+
+        // done : arbre désérialisé (arcs/chapters/scenes/rooms + npcs).
+        CampaignImportProposal proposal = c.done.get();
+        assertNotNull(proposal);
+        assertEquals(1, proposal.arcs().size());
+        var arc = proposal.arcs().get(0);
+        assertEquals("Acte I", arc.name());
+        assertEquals("Mise en place", arc.description());
+        assertEquals("LINEAR", arc.type());
+        assertEquals(1, arc.chapters().size());
+        var chapter = arc.chapters().get(0);
+        assertEquals("Chapitre 1", chapter.name());
+        assertEquals(1, chapter.scenes().size());
+        var scene = chapter.scenes().get(0);
+        assertEquals("L'auberge", scene.name());
+        assertEquals("Lisez ceci", scene.playerNarration());
+        assertEquals("Secret MJ", scene.gmNotes());
+        assertEquals(1, scene.rooms().size());
+        var room = scene.rooms().get(0);
+        assertEquals("Cave", room.name());
+        assertEquals("2 gobelins", room.enemies());
+        assertEquals("50 po", room.loot());
+        assertEquals(1, proposal.npcs().size());
+        assertEquals("Thorin", proposal.npcs().get(0).name());
+        assertEquals("Nain bougon", proposal.npcs().get(0).description());
+
+        assertNull(c.error.get(), "aucune erreur sur un flux terminé par done");
+    }
+
+    private static String doneJson() {
+        return "{"
+                + "\"arcs\":[{"
+                + "  \"name\":\"Acte I\",\"description\":\"Mise en place\",\"type\":\"LINEAR\","
+                + "  \"chapters\":[{"
+                + "    \"name\":\"Chapitre 1\",\"description\":\"intro\","
+                + "    \"scenes\":[{"
+                + "      \"name\":\"L'auberge\",\"description\":\"tendue\","
+                + "      \"player_narration\":\"Lisez ceci\",\"gm_notes\":\"Secret MJ\","
+                + "      \"rooms\":[{\"name\":\"Cave\",\"description\":\"sombre\",\"enemies\":\"2 gobelins\",\"loot\":\"50 po\"}]"
+                + "    }]"
+                + "  }]"
+                + "}],"
+                + "\"npcs\":[{\"name\":\"Thorin\",\"description\":\"Nain bougon\"}]"
+                + "}";
+    }
+
+    // ---------- events simples : heartbeat / status / chunk_failed / extracting
+
+    @Test
+    void event_heartbeat_propage_le_keepalive() {
+        String sse =
+                "event:heartbeat\ndata:\n\n" +
+                "event:heartbeat\ndata:\n\n" +
+                "event:done\ndata:" + emptyDoneJson() + "\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        assertEquals(2, c.heartbeats.get());
+        assertNotNull(c.done.get());
+    }
+
+    @Test
+    void event_status_relaie_le_message_lisible() {
+        String sse =
+                "event:status\ndata:{\"message\":\"Fournisseur saturé, nouvelle tentative\"}\n\n" +
+                "event:done\ndata:" + emptyDoneJson() + "\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        assertEquals(1, c.statuses.size());
+        assertEquals("Fournisseur saturé, nouvelle tentative", c.statuses.get(0));
+    }
+
+    @Test
+    void event_status_sans_champ_message_relaie_data_brut() {
+        // readMessage : pas de champ "message" -> renvoie la data brute.
+        String sse =
+                "event:status\ndata:texte-brut\n\n" +
+                "event:done\ndata:" + emptyDoneJson() + "\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        assertEquals("texte-brut", c.statuses.get(0));
+    }
+
+    @Test
+    void event_chunk_failed_compose_un_status_avec_compteurs_et_message() {
+        String sse =
+                "event:chunk_failed\ndata:{\"current\":3,\"total\":10,\"message\":\"timeout LLM\"}\n\n" +
+                "event:done\ndata:" + emptyDoneJson() + "\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        assertEquals("Morceau 3/10 ignoré : timeout LLM", c.statuses.get(0));
+    }
+
+    @Test
+    void event_chunk_failed_sans_message_termine_par_un_point() {
+        // Branche msg.isEmpty() -> suffixe "." au lieu de " : <msg>".
+        String sse =
+                "event:chunk_failed\ndata:{\"current\":1,\"total\":4}\n\n" +
+                "event:done\ndata:" + emptyDoneJson() + "\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        assertEquals("Morceau 1/4 ignoré.", c.statuses.get(0));
+    }
+
+    @Test
+    void event_chunk_failed_avec_json_invalide_donne_zero_zero() {
+        // data non-JSON -> readJson renvoie null -> current/total à 0, suffixe ".".
+        String sse =
+                "event:chunk_failed\ndata:pas-du-json\n\n" +
+                "event:done\ndata:" + emptyDoneJson() + "\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        assertEquals("Morceau 0/0 ignoré.", c.statuses.get(0));
+    }
+
+    @Test
+    void event_extracting_emet_un_progress_neutre() {
+        String sse =
+                "event:extracting\ndata:\n\n" +
+                "event:done\ndata:" + emptyDoneJson() + "\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        assertEquals(1, c.progresses.size());
+        CampaignImportProgress p = c.progresses.get(0);
+        assertEquals(0, p.current());
+        assertEquals(0, p.total());
+        assertEquals(0, p.pageCount());
+        assertEquals(0, p.npcCount());
+    }
+
+    private static String emptyDoneJson() {
+        return "{\"arcs\":[],\"npcs\":[]}";
+    }
+
+    // ---------- event error (terminal) -------------------------------------
+
+    @Test
+    void event_error_appelle_onError_et_n_appelle_pas_onDone() {
+        String sse =
+                "event:start\ndata:{\"total\":2,\"page_count\":1,\"ocr_page_count\":0}\n\n" +
+                "event:error\ndata:{\"message\":\"PDF illisible\"}\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        assertNotNull(c.error.get());
+        assertInstanceOf(CampaignImportException.class, c.error.get());
+        assertTrue(c.error.get().getMessage().contains("PDF illisible"));
+        assertNull(c.done.get(), "onDone non appelé après un error terminal");
+    }
+
+    @Test
+    void event_error_sans_message_relaie_data_brut() {
+        String sse = "event:error\ndata:erreur-brute\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        assertNotNull(c.error.get());
+        assertTrue(c.error.get().getMessage().contains("erreur-brute"));
+    }
+
+    // ---------- branches de robustesse du parsing --------------------------
+
+    @Test
+    void event_inconnu_avec_data_non_json_est_ignore() {
+        // event non géré + data non-JSON -> readJson null -> return sans effet ;
+        // flux clos sans done -> branche d'interruption (onError).
+        String sse = "event:mystere\ndata:pas-du-json\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        assertTrue(c.progresses.isEmpty());
+        assertTrue(c.statuses.isEmpty());
+        assertNull(c.done.get());
+        assertNotNull(c.error.get(), "flux interrompu sans done/error -> onError");
+    }
+
+    @Test
+    void start_avec_champs_absents_utilise_les_valeurs_par_defaut() {
+        // JSON valide mais sans page_count/ocr/total -> path().asInt() == 0.
+        String sse =
+                "event:start\ndata:{}\n\n" +
+                "event:done\ndata:" + emptyDoneJson() + "\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        CampaignImportProgress p = c.progresses.get(0);
+        assertEquals(0, p.total());
+        assertEquals(0, p.pageCount());
+        assertEquals(0, p.ocrPageCount());
+    }
+
+    @Test
+    void done_avec_arbre_vide_donne_une_proposition_vide() {
+        // Couvre toArcs/toNpcs sur des tableaux vides + text() sur champs absents.
+        String sse = "event:done\ndata:" + emptyDoneJson() + "\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        assertNotNull(c.done.get());
+        assertTrue(c.done.get().arcs().isEmpty());
+        assertTrue(c.done.get().npcs().isEmpty());
+    }
+
+    @Test
+    void done_avec_arc_sans_chapitres_et_npc_sans_description() {
+        // toChapters sur noeud absent (path -> MissingNode, non-array) -> liste vide ;
+        // text() sur "description" absent -> "".
+        String sse = "event:done\ndata:{"
+                + "\"arcs\":[{\"name\":\"Solo\"}],"
+                + "\"npcs\":[{\"name\":\"Anon\"}]"
+                + "}\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        var proposal = c.done.get();
+        assertNotNull(proposal);
+        var arc = proposal.arcs().get(0);
+        assertEquals("Solo", arc.name());
+        assertEquals("", arc.description());
+        assertEquals("", arc.type());
+        assertTrue(arc.chapters().isEmpty());
+        assertEquals("Anon", proposal.npcs().get(0).name());
+        assertEquals("", proposal.npcs().get(0).description());
+    }
+
+    @Test
+    void done_avec_champ_explicitement_null_donne_chaine_vide() {
+        // text() : valeur JSON null -> "" (branche v.isNull()).
+        String sse = "event:done\ndata:{"
+                + "\"arcs\":[{\"name\":null,\"description\":\"d\"}],"
+                + "\"npcs\":[]"
+                + "}\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        assertEquals("", c.done.get().arcs().get(0).name());
+        assertEquals("d", c.done.get().arcs().get(0).description());
+    }
+
+    // ---------- fin de flux sans terminaison -------------------------------
+
+    @Test
+    void flux_clos_sans_done_ni_error_appelle_onError() {
+        // terminated reste false -> branche "Le flux d'import s'est interrompu...".
+        String sse = "event:progress\ndata:{\"current\":1,\"total\":3}\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        assertNull(c.done.get());
+        assertNotNull(c.error.get());
+        assertInstanceOf(CampaignImportException.class, c.error.get());
+        assertTrue(c.error.get().getMessage().contains("interrompu"));
+    }
+
+    // ---------- erreur de transport ----------------------------------------
+
+    @Test
+    void erreur_transport_traduite_en_CampaignImportException() {
+        // Mono.error -> blockLast lève -> branche catch, expose type + message de la cause.
+        Collector c = new Collector();
+        c.invoke(clientFailingWith(new RuntimeException("connexion coupée")));
+
+        assertNotNull(c.error.get());
+        assertInstanceOf(CampaignImportException.class, c.error.get());
+        assertTrue(c.error.get().getMessage().contains("streaming d'import"));
+        assertTrue(c.error.get().getMessage().contains("connexion coupée"));
+        assertNull(c.done.get());
+    }
+
+    @Test
+    void erreur_transport_sans_message_reste_geree() {
+        // Cause sans message -> branche getMessage() == null (pas de " — ...").
+        Collector c = new Collector();
+        c.invoke(clientFailingWith(new RuntimeException()));
+
+        assertNotNull(c.error.get());
+        assertInstanceOf(CampaignImportException.class, c.error.get());
+        assertTrue(c.error.get().getMessage().contains("streaming d'import"));
+    }
+
+    @Test
+    void erreur_transport_apres_event_error_ne_double_pas_le_callback() {
+        // error terminal puis le flux se clôt : terminated[0]==true -> pas de second onError.
+        // (vérifie que le callback n'est appelé qu'une fois via le message attendu.)
+        String sse = "event:error\ndata:{\"message\":\"stop\"}\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse));
+
+        assertNotNull(c.error.get());
+        assertTrue(c.error.get().getMessage().contains("stop"));
+        assertFalse(c.error.get().getMessage().contains("interrompu"));
+    }
+
+    // ---------- nom de fichier ---------------------------------------------
+
+    @Test
+    void filename_null_ou_blanc_est_accepte() {
+        // Couvre la branche de repli "campaign.pdf" dans filePart + part().filename().
+        String sse = "event:done\ndata:" + emptyDoneJson() + "\n\n";
+        Collector c1 = new Collector();
+        c1.invoke(clientReturning(sse), null);
+        assertNotNull(c1.done.get());
+
+        Collector c2 = new Collector();
+        c2.invoke(clientReturning(sse), "   ");
+        assertNotNull(c2.done.get());
+
+        Collector c3 = new Collector();
+        c3.invoke(clientReturning(sse), "mon-livre.pdf");
+        assertNotNull(c3.done.get());
+    }
+}
diff --git a/core/src/test/java/com/loremind/infrastructure/ai/BrainChatPayloadBuilderTest.java b/core/src/test/java/com/loremind/infrastructure/ai/BrainChatPayloadBuilderTest.java
index 8a131d6..23a96c8 100644
--- a/core/src/test/java/com/loremind/infrastructure/ai/BrainChatPayloadBuilderTest.java
+++ b/core/src/test/java/com/loremind/infrastructure/ai/BrainChatPayloadBuilderTest.java
@@ -7,12 +7,21 @@ import com.loremind.domain.generationcontext.CampaignStructuralContext.ChapterSu
 import com.loremind.domain.generationcontext.CampaignStructuralContext.SceneSummary;
 import com.loremind.domain.generationcontext.ChatMessage;
 import com.loremind.domain.generationcontext.ChatRequest;
+import com.loremind.domain.generationcontext.CampaignStructuralContext.CharacterSummary;
+import com.loremind.domain.generationcontext.CampaignStructuralContext.NpcSummary;
+import com.loremind.domain.generationcontext.CampaignStructuralContext.RoomBranchHint;
+import com.loremind.domain.generationcontext.CampaignStructuralContext.RoomSummary;
+import com.loremind.domain.generationcontext.GameSystemContext;
 import com.loremind.domain.generationcontext.LoreStructuralContext;
 import com.loremind.domain.generationcontext.LoreStructuralContext.PageSummary;
 import com.loremind.domain.generationcontext.NarrativeEntityContext;
 import com.loremind.domain.generationcontext.PageContext;
+import com.loremind.domain.generationcontext.SessionContext;
+import com.loremind.domain.generationcontext.SessionContext.JournalEntrySummary;
+import com.loremind.domain.generationcontext.SessionContext.QuestSummary;
 import org.junit.jupiter.api.Test;
 
+import java.time.LocalDateTime;
 import java.util.List;
 import java.util.Map;
 
@@ -284,4 +293,252 @@ class BrainChatPayloadBuilderTest {
         assertFalse(payload.containsKey("lore_context"));
         assertFalse(payload.containsKey("page_context"));
     }
+
+    // ---------- arc HUB + characters/npcs ----------------------------------
+
+    @Test
+    @SuppressWarnings("unchecked")
+    void build_arcHub_injecteArcTypeHub() {
+        // arc.hub() == true -> ajoute "arc_type":"HUB" (vocabulaire « quêtes »).
+        ArcSummary arc = new ArcSummary("Hub central", "", true, 0, List.of());
+        CampaignStructuralContext camp = new CampaignStructuralContext(
+                "X", "", List.of(arc), List.of(), List.of());
+        ChatRequest req = ChatRequest.builder().messages(sampleMessages).campaignContext(camp).build();
+
+        Map<String, Object> arcMap = firstOf(asMap(builder.build(req).get("campaign_context")), "arcs");
+        assertEquals("HUB", arcMap.get("arc_type"));
+    }
+
+    @Test
+    @SuppressWarnings("unchecked")
+    void build_arcLineaire_n_injectePasArcType() {
+        ArcSummary arc = new ArcSummary("Lineaire", "", false, 0, List.of());
+        CampaignStructuralContext camp = new CampaignStructuralContext(
+                "X", "", List.of(arc), List.of(), List.of());
+        ChatRequest req = ChatRequest.builder().messages(sampleMessages).campaignContext(camp).build();
+
+        Map<String, Object> arcMap = firstOf(asMap(builder.build(req).get("campaign_context")), "arcs");
+        assertFalse(arcMap.containsKey("arc_type"));
+    }
+
+    @Test
+    @SuppressWarnings("unchecked")
+    void build_campaignContext_serialiseCharactersEtNpcs_avecOmissionSnippetBlank() {
+        // snippet renseigné -> présent ; snippet blank/null -> omis.
+        CharacterSummary pj1 = new CharacterSummary("Aria", "Magicienne elfe");
+        CharacterSummary pj2 = new CharacterSummary("Bran", "   ");
+        NpcSummary pnj1 = new NpcSummary("Garde", "Sentinelle bourrue");
+        NpcSummary pnj2 = new NpcSummary("Mendiant", null);
+        CampaignStructuralContext camp = new CampaignStructuralContext(
+                "X", "", List.of(), List.of(pj1, pj2), List.of(pnj1, pnj2));
+        ChatRequest req = ChatRequest.builder().messages(sampleMessages).campaignContext(camp).build();
+
+        Map<String, Object> cctx = asMap(builder.build(req).get("campaign_context"));
+        List<Map<String, Object>> chars = (List<Map<String, Object>>) cctx.get("characters");
+        assertEquals("Aria", chars.get(0).get("name"));
+        assertTrue(chars.get(0).containsKey("snippet"));
+        assertFalse(chars.get(1).containsKey("snippet"), "snippet blank omis");
+
+        List<Map<String, Object>> npcs = (List<Map<String, Object>>) cctx.get("npcs");
+        assertEquals("Garde", npcs.get(0).get("name"));
+        assertTrue(npcs.get(0).containsKey("snippet"));
+        assertFalse(npcs.get(1).containsKey("snippet"), "snippet null omis");
+    }
+
+    // ---------- rooms d'une scène ------------------------------------------
+
+    @Test
+    @SuppressWarnings("unchecked")
+    void build_sceneRooms_serialiseTousLesChampsEtBranchesEntrePieces() {
+        RoomBranchHint exit = new RoomBranchHint("porte nord", "Salle du trone", "clé en main");
+        RoomSummary room = new RoomSummary("Hall", 1, "Vaste entrée", "Spectres", List.of(exit));
+        SceneSummary scene = new SceneSummary("Donjon", "", 0, List.of(), List.of(room));
+        ChapterSummary chapter = new ChapterSummary("Ch", "", 0, List.of(scene));
+        ArcSummary arc = new ArcSummary("A", "", false, 0, List.of(chapter));
+        CampaignStructuralContext camp = new CampaignStructuralContext(
+                "X", "", List.of(arc), List.of(), List.of());
+        ChatRequest req = ChatRequest.builder().messages(sampleMessages).campaignContext(camp).build();
+
+        Map<String, Object> arcMap = firstOf(asMap(builder.build(req).get("campaign_context")), "arcs");
+        Map<String, Object> sceneMap = firstOf(firstOf(arcMap, "chapters"), "scenes");
+        Map<String, Object> roomMap = firstOf(sceneMap, "rooms");
+
+        assertEquals("Hall", roomMap.get("name"));
+        assertEquals(1, roomMap.get("floor"));
+        assertEquals("Vaste entrée", roomMap.get("description"));
+        assertEquals("Spectres", roomMap.get("enemies"));
+        Map<String, Object> branchMap = firstOf(roomMap, "branches");
+        assertEquals("porte nord", branchMap.get("label"));
+        assertEquals("Salle du trone", branchMap.get("target_room_name"));
+        assertEquals("clé en main", branchMap.get("condition"));
+    }
+
+    @Test
+    @SuppressWarnings("unchecked")
+    void build_sceneRooms_ometLesChampsOptionnelsVides() {
+        // floor null, description/enemies blank, condition blank, branches non vides.
+        RoomBranchHint exit = new RoomBranchHint("sortie", "Autre", "  ");
+        RoomSummary room = new RoomSummary("Cellule", null, "  ", "   ", List.of(exit));
+        SceneSummary scene = new SceneSummary("Donjon", "", 0, List.of(), List.of(room));
+        ChapterSummary chapter = new ChapterSummary("Ch", "", 0, List.of(scene));
+        ArcSummary arc = new ArcSummary("A", "", false, 0, List.of(chapter));
+        CampaignStructuralContext camp = new CampaignStructuralContext(
+                "X", "", List.of(arc), List.of(), List.of());
+        ChatRequest req = ChatRequest.builder().messages(sampleMessages).campaignContext(camp).build();
+
+        Map<String, Object> arcMap = firstOf(asMap(builder.build(req).get("campaign_context")), "arcs");
+        Map<String, Object> sceneMap = firstOf(firstOf(arcMap, "chapters"), "scenes");
+        Map<String, Object> roomMap = firstOf(sceneMap, "rooms");
+
+        assertFalse(roomMap.containsKey("floor"));
+        assertFalse(roomMap.containsKey("description"));
+        assertFalse(roomMap.containsKey("enemies"));
+        Map<String, Object> branchMap = firstOf(roomMap, "branches");
+        assertFalse(branchMap.containsKey("condition"), "condition blank omise");
+    }
+
+    @Test
+    @SuppressWarnings("unchecked")
+    void build_sceneRooms_omisesSiListeVide() {
+        // s.rooms() vide -> clé "rooms" absente.
+        SceneSummary scene = new SceneSummary("Lineaire", "", 0, List.of(), List.of());
+        ChapterSummary chapter = new ChapterSummary("Ch", "", 0, List.of(scene));
+        ArcSummary arc = new ArcSummary("A", "", false, 0, List.of(chapter));
+        CampaignStructuralContext camp = new CampaignStructuralContext(
+                "X", "", List.of(arc), List.of(), List.of());
+        ChatRequest req = ChatRequest.builder().messages(sampleMessages).campaignContext(camp).build();
+
+        Map<String, Object> arcMap = firstOf(asMap(builder.build(req).get("campaign_context")), "arcs");
+        Map<String, Object> sceneMap = firstOf(firstOf(arcMap, "chapters"), "scenes");
+        assertFalse(sceneMap.containsKey("rooms"));
+    }
+
+    // ---------- game_system_context ----------------------------------------
+
+    @Test
+    @SuppressWarnings("unchecked")
+    void build_gameSystemContext_completInclutDescriptionEtSections() {
+        GameSystemContext gs = new GameSystemContext(
+                "Nimble", "JDR rapide", Map.of("Combat", "Lancez 1d20"));
+        ChatRequest req = ChatRequest.builder().messages(sampleMessages).gameSystemContext(gs).build();
+
+        Map<String, Object> gsm = asMap(builder.build(req).get("game_system_context"));
+        assertEquals("Nimble", gsm.get("system_name"));
+        assertEquals("JDR rapide", gsm.get("system_description"));
+        assertEquals(Map.of("Combat", "Lancez 1d20"), gsm.get("sections"));
+    }
+
+    @Test
+    @SuppressWarnings("unchecked")
+    void build_gameSystemContext_descriptionBlankEtSectionsNull() {
+        // systemDescription blank -> omis ; sections null -> Map.of() de repli.
+        GameSystemContext gs = new GameSystemContext("D&D 5.1", "   ", null);
+        ChatRequest req = ChatRequest.builder().messages(sampleMessages).gameSystemContext(gs).build();
+
+        Map<String, Object> gsm = asMap(builder.build(req).get("game_system_context"));
+        assertEquals("D&D 5.1", gsm.get("system_name"));
+        assertFalse(gsm.containsKey("system_description"));
+        assertEquals(Map.of(), gsm.get("sections"));
+    }
+
+    // ---------- session_context --------------------------------------------
+
+    @Test
+    @SuppressWarnings("unchecked")
+    void build_sessionContext_complet_inclutToutesLesListesPeuplees() {
+        LocalDateTime now = LocalDateTime.of(2026, 6, 14, 20, 0);
+        JournalEntrySummary entry = new JournalEntrySummary(
+                "combat", "Le dragon attaque", now, null);
+        JournalEntrySummary prev = new JournalEntrySummary(
+                "info", "Le roi est mort", now, "Session 1");
+        QuestSummary avail = new QuestSummary("Sauver le village", "Acte I", "Urgence");
+        QuestSummary inProg = new QuestSummary("Trouver l'épée", "Acte II", "  ");
+        SessionContext sc = new SessionContext(
+                "Session 2", true, now,
+                List.of(entry), List.of(prev),
+                List.of(avail), List.of(inProg),
+                List.of("Quête secrète"), List.of("porte_ouverte"));
+        ChatRequest req = ChatRequest.builder().messages(sampleMessages).sessionContext(sc).build();
+
+        Map<String, Object> scm = asMap(builder.build(req).get("session_context"));
+        assertEquals("Session 2", scm.get("session_name"));
+        assertEquals(true, scm.get("active"));
+        assertEquals(now.toString(), scm.get("started_at"));
+
+        // entries : type/content/occurredAt présents, source omis (null) sur l'entrée courante.
+        Map<String, Object> entryMap = firstOf(scm, "entries");
+        assertEquals("combat", entryMap.get("type"));
+        assertEquals("Le dragon attaque", entryMap.get("content"));
+        assertEquals(now.toString(), entryMap.get("occurred_at"));
+        assertFalse(entryMap.containsKey("source_session_name"));
+
+        // previous_events : source renseignée.
+        Map<String, Object> prevMap = firstOf(scm, "previous_events");
+        assertEquals("Session 1", prevMap.get("source_session_name"));
+
+        // available_quests : description renseignée ; in_progress : description blank omise.
+        Map<String, Object> availMap = firstOf(scm, "available_quests");
+        assertEquals("Sauver le village", availMap.get("name"));
+        assertEquals("Acte I", availMap.get("arc_name"));
+        assertEquals("Urgence", availMap.get("description"));
+        Map<String, Object> inProgMap = firstOf(scm, "in_progress_quests");
+        assertFalse(inProgMap.containsKey("description"), "description blank omise");
+
+        assertEquals(List.of("Quête secrète"), scm.get("locked_quest_titles"));
+        assertEquals(List.of("porte_ouverte"), scm.get("active_flags"));
+    }
+
+    @Test
+    @SuppressWarnings("unchecked")
+    void build_sessionContext_minimal_ometListesVidesEtChampsNull() {
+        // startedAt null -> omis ; entries null -> List.of() ; toutes les autres listes
+        // vides/null -> clés absentes.
+        SessionContext sc = new SessionContext(
+                "Session vide", false, null,
+                null, List.of(),
+                List.of(), List.of(),
+                List.of(), List.of());
+        ChatRequest req = ChatRequest.builder().messages(sampleMessages).sessionContext(sc).build();
+
+        Map<String, Object> scm = asMap(builder.build(req).get("session_context"));
+        assertEquals("Session vide", scm.get("session_name"));
+        assertEquals(false, scm.get("active"));
+        assertFalse(scm.containsKey("started_at"));
+        assertEquals(List.of(), scm.get("entries"));
+        assertFalse(scm.containsKey("previous_events"));
+        assertFalse(scm.containsKey("available_quests"));
+        assertFalse(scm.containsKey("in_progress_quests"));
+        assertFalse(scm.containsKey("locked_quest_titles"));
+        assertFalse(scm.containsKey("active_flags"));
+    }
+
+    // ---------- tous les contextes présents simultanément ------------------
+
+    @Test
+    void build_tousLesContextes_sontTousPresents() {
+        LoreStructuralContext lore = new LoreStructuralContext("L", "", Map.of(), List.of());
+        PageContext page = new PageContext("P", "T", List.of(), Map.of());
+        CampaignStructuralContext camp = new CampaignStructuralContext("C", "", List.of(), List.of(), List.of());
+        NarrativeEntityContext entity = new NarrativeEntityContext("scene", "S", Map.of());
+        GameSystemContext gs = new GameSystemContext("G", null, Map.of());
+        SessionContext sc = new SessionContext("Sess", true, null, List.of(), List.of(),
+                List.of(), List.of(), List.of(), List.of());
+        ChatRequest req = ChatRequest.builder()
+                .messages(sampleMessages)
+                .loreContext(lore)
+                .pageContext(page)
+                .campaignContext(camp)
+                .narrativeEntity(entity)
+                .gameSystemContext(gs)
+                .sessionContext(sc)
+                .build();
+
+        Map<String, Object> payload = builder.build(req);
+        assertTrue(payload.containsKey("lore_context"));
+        assertTrue(payload.containsKey("page_context"));
+        assertTrue(payload.containsKey("campaign_context"));
+        assertTrue(payload.containsKey("narrative_entity"));
+        assertTrue(payload.containsKey("game_system_context"));
+        assertTrue(payload.containsKey("session_context"));
+    }
 }
diff --git a/core/src/test/java/com/loremind/infrastructure/ai/BrainConversationTitleClientTest.java b/core/src/test/java/com/loremind/infrastructure/ai/BrainConversationTitleClientTest.java
new file mode 100644
index 0000000..ba951c6
--- /dev/null
+++ b/core/src/test/java/com/loremind/infrastructure/ai/BrainConversationTitleClientTest.java
@@ -0,0 +1,134 @@
+package com.loremind.infrastructure.ai;
+
+import com.loremind.domain.conversationcontext.ConversationMessage;
+import org.junit.jupiter.api.Test;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.web.reactive.function.client.ClientResponse;
+import org.springframework.web.reactive.function.client.ExchangeFunction;
+import org.springframework.web.reactive.function.client.WebClient;
+import reactor.core.publisher.Mono;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests unitaires purs (JUnit 5, sans Spring, sans réseau) de
+ * {@link BrainConversationTitleClient}.
+ *
+ * Principe : on injecte un WebClient.Builder préconfiguré avec une
+ * ExchangeFunction mock qui renvoie des réponses canned -> aucun appel réseau.
+ */
+class BrainConversationTitleClientTest {
+
+    private static final String FALLBACK = "Nouvelle conversation";
+
+    /** Construit un client dont le WebClient répond avec la réponse fournie. */
+    private BrainConversationTitleClient clientReturning(ClientResponse response) {
+        ExchangeFunction ef = req -> Mono.just(response);
+        WebClient.Builder builder = WebClient.builder().exchangeFunction(ef);
+        return new BrainConversationTitleClient(builder, "http://brain");
+    }
+
+    /** Construit un client dont le WebClient émet une erreur transport. */
+    private BrainConversationTitleClient clientErroring() {
+        ExchangeFunction ef = req -> Mono.error(new RuntimeException("boom"));
+        WebClient.Builder builder = WebClient.builder().exchangeFunction(ef);
+        return new BrainConversationTitleClient(builder, "http://brain");
+    }
+
+    private ClientResponse jsonOk(String body) {
+        return ClientResponse.create(HttpStatus.OK)
+                .header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
+                .body(body)
+                .build();
+    }
+
+    private ConversationMessage msg(String role, String content) {
+        return ConversationMessage.builder().role(role).content(content).build();
+    }
+
+    @Test
+    void liste_null_renvoie_fallback() {
+        // Pas besoin d'appel réseau : court-circuit sur entrée null.
+        BrainConversationTitleClient client = clientErroring();
+        assertThat(client.generate(null)).isEqualTo(FALLBACK);
+    }
+
+    @Test
+    void liste_vide_renvoie_fallback() {
+        BrainConversationTitleClient client = clientErroring();
+        assertThat(client.generate(List.of())).isEqualTo(FALLBACK);
+    }
+
+    @Test
+    void reponse_ok_avec_titre_renvoie_le_titre() {
+        BrainConversationTitleClient client = clientReturning(jsonOk("{\"title\":\"Mon titre\"}"));
+        String result = client.generate(List.of(msg("user", "Salut")));
+        assertThat(result).isEqualTo("Mon titre");
+    }
+
+    @Test
+    void titre_avec_espaces_est_trimme() {
+        BrainConversationTitleClient client = clientReturning(jsonOk("{\"title\":\"  Espacé  \"}"));
+        String result = client.generate(List.of(msg("user", "Bonjour")));
+        assertThat(result).isEqualTo("Espacé");
+    }
+
+    @Test
+    void contenu_message_null_traite_sans_npe() {
+        // content null -> mappé en "" dans le payload, ne doit pas lever.
+        BrainConversationTitleClient client = clientReturning(jsonOk("{\"title\":\"Ok\"}"));
+        String result = client.generate(List.of(msg("assistant", null)));
+        assertThat(result).isEqualTo("Ok");
+    }
+
+    @Test
+    void titre_absent_renvoie_fallback() {
+        BrainConversationTitleClient client = clientReturning(jsonOk("{\"autre\":\"x\"}"));
+        String result = client.generate(List.of(msg("user", "Hello")));
+        assertThat(result).isEqualTo(FALLBACK);
+    }
+
+    @Test
+    void titre_vide_renvoie_fallback() {
+        BrainConversationTitleClient client = clientReturning(jsonOk("{\"title\":\"\"}"));
+        String result = client.generate(List.of(msg("user", "Hello")));
+        assertThat(result).isEqualTo(FALLBACK);
+    }
+
+    @Test
+    void titre_blanc_renvoie_fallback() {
+        BrainConversationTitleClient client = clientReturning(jsonOk("{\"title\":\"   \"}"));
+        String result = client.generate(List.of(msg("user", "Hello")));
+        assertThat(result).isEqualTo(FALLBACK);
+    }
+
+    @Test
+    void corps_json_vide_renvoie_fallback() {
+        // Map décodée non null mais sans clé "title".
+        BrainConversationTitleClient client = clientReturning(jsonOk("{}"));
+        String result = client.generate(List.of(msg("user", "Hello")));
+        assertThat(result).isEqualTo(FALLBACK);
+    }
+
+    @Test
+    void erreur_transport_renvoie_fallback() {
+        BrainConversationTitleClient client = clientErroring();
+        String result = client.generate(List.of(msg("user", "Hello")));
+        assertThat(result).isEqualTo(FALLBACK);
+    }
+
+    @Test
+    void reponse_500_renvoie_fallback() {
+        ClientResponse err = ClientResponse.create(HttpStatus.INTERNAL_SERVER_ERROR)
+                .header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
+                .body("{\"error\":\"down\"}")
+                .build();
+        BrainConversationTitleClient client = clientReturning(err);
+        String result = client.generate(List.of(msg("user", "Hello")));
+        assertThat(result).isEqualTo(FALLBACK);
+    }
+}
diff --git a/core/src/test/java/com/loremind/infrastructure/ai/BrainGeneratePageRequestTest.java b/core/src/test/java/com/loremind/infrastructure/ai/BrainGeneratePageRequestTest.java
new file mode 100644
index 0000000..f0d8db3
--- /dev/null
+++ b/core/src/test/java/com/loremind/infrastructure/ai/BrainGeneratePageRequestTest.java
@@ -0,0 +1,85 @@
+package com.loremind.infrastructure.ai;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+/**
+ * Tests unitaires des DTOs wire de l'Adapter IA :
+ *  - BrainGeneratePageRequest (record envoye au Brain) ;
+ *  - BrainGeneratePageResponse (@Data/@NoArgsConstructor recu du Brain).
+ * On instancie et on appelle les accesseurs pour couvrir le code genere.
+ */
+class BrainGeneratePageRequestTest {
+
+    // --- BrainGeneratePageRequest -------------------------------------------
+
+    @Test
+    void request_accesseursExposentLesChamps() {
+        BrainGeneratePageRequest req = new BrainGeneratePageRequest(
+                "Aetheria",
+                "Un monde de cendres",
+                "PNJ",
+                "Fiche personnage",
+                List.of("histoire", "motto"),
+                "Garde rouge"
+        );
+
+        assertEquals("Aetheria", req.loreName());
+        assertEquals("Un monde de cendres", req.loreDescription());
+        assertEquals("PNJ", req.folderName());
+        assertEquals("Fiche personnage", req.templateName());
+        assertEquals(List.of("histoire", "motto"), req.templateFields());
+        assertEquals("Garde rouge", req.pageTitle());
+    }
+
+    @Test
+    void request_egaliteStructurelleEtToString() {
+        BrainGeneratePageRequest a = new BrainGeneratePageRequest(
+                "n", "d", "f", "t", List.of("x"), "p");
+        BrainGeneratePageRequest b = new BrainGeneratePageRequest(
+                "n", "d", "f", "t", List.of("x"), "p");
+        BrainGeneratePageRequest c = new BrainGeneratePageRequest(
+                "AUTRE", "d", "f", "t", List.of("x"), "p");
+
+        assertEquals(a, b);
+        assertEquals(a.hashCode(), b.hashCode());
+        assertNotEquals(a, c);
+        // toString genere : on verifie juste qu'il est non vide et contient un champ
+        org.junit.jupiter.api.Assertions.assertTrue(a.toString().contains("n"));
+    }
+
+    // --- BrainGeneratePageResponse ------------------------------------------
+
+    @Test
+    void response_setterEtGetterValues() {
+        BrainGeneratePageResponse resp = new BrainGeneratePageResponse();
+        assertNull(resp.getValues());
+
+        Map<String, String> values = Map.of("histoire", "Nee sous une etoile rouge");
+        resp.setValues(values);
+
+        assertEquals(values, resp.getValues());
+        assertEquals("Nee sous une etoile rouge", resp.getValues().get("histoire"));
+    }
+
+    @Test
+    void response_egaliteEtToStringGeneresParLombok() {
+        BrainGeneratePageResponse a = new BrainGeneratePageResponse();
+        a.setValues(Map.of("f", "v"));
+        BrainGeneratePageResponse b = new BrainGeneratePageResponse();
+        b.setValues(Map.of("f", "v"));
+        BrainGeneratePageResponse c = new BrainGeneratePageResponse();
+        c.setValues(Map.of("f", "AUTRE"));
+
+        assertEquals(a, b);
+        assertEquals(a.hashCode(), b.hashCode());
+        assertNotEquals(a, c);
+        org.junit.jupiter.api.Assertions.assertTrue(a.toString().contains("values"));
+    }
+}
diff --git a/core/src/test/java/com/loremind/infrastructure/ai/BrainItemCatalogClientTest.java b/core/src/test/java/com/loremind/infrastructure/ai/BrainItemCatalogClientTest.java
new file mode 100644
index 0000000..ecdd90b
--- /dev/null
+++ b/core/src/test/java/com/loremind/infrastructure/ai/BrainItemCatalogClientTest.java
@@ -0,0 +1,202 @@
+package com.loremind.infrastructure.ai;
+
+import com.loremind.domain.campaigncontext.CatalogItem;
+import com.loremind.domain.campaigncontext.ports.ItemCatalogGenerationException;
+import com.loremind.domain.campaigncontext.ports.ItemCatalogGenerator.GeneratedCatalog;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.client.HttpServerErrorException;
+import org.springframework.web.client.ResourceAccessException;
+import org.springframework.web.client.RestTemplate;
+
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+/**
+ * Tests unitaires purs (JUnit 5 + Mockito, sans Spring) de {@link BrainItemCatalogClient}.
+ * Le RestTemplate est mocké : {@code postForObject(url, entity, Map.class)}.
+ */
+class BrainItemCatalogClientTest {
+
+    private RestTemplate rt;
+    private BrainItemCatalogClient client;
+
+    @BeforeEach
+    void setUp() {
+        rt = mock(RestTemplate.class);
+        client = new BrainItemCatalogClient(rt, "http://brain");
+    }
+
+    /** Construit une map d'objet pour le payload "items". */
+    private static Map<String, Object> item(Object name, Object price, Object category, Object description) {
+        Map<String, Object> m = new LinkedHashMap<>();
+        m.put("name", name);
+        m.put("price", price);
+        m.put("category", category);
+        m.put("description", description);
+        return m;
+    }
+
+    // ---------- generate : cas nominal et mapping ----------
+
+    @Test
+    void generate_reponseValide_mappeItems_etIgnoreInvalides() {
+        List<Object> items = new ArrayList<>();
+        items.add(item("Épée longue", "15 po", "Armes", "Tranchante"));   // valide
+        items.add(item("Potion", null, null, null));                       // valide, champs null
+        items.add(item(null, "1 po", "x", "y"));                          // ignoré : name null
+        items.add(item("   ", "1 po", "x", "y"));                         // ignoré : name blank
+        items.add("pas une map");                                         // ignoré : item non-Map
+
+        Map<String, Object> resp = new LinkedHashMap<>();
+        resp.put("name", "Boutique du forgeron");
+        resp.put("description", "Au village");
+        resp.put("items", items);
+
+        when(rt.postForObject(anyString(), any(), eq(Map.class))).thenReturn(resp);
+
+        GeneratedCatalog cat = client.generate("desc", "ctx");
+
+        assertEquals("Boutique du forgeron", cat.name());
+        assertEquals("Au village", cat.description());
+        assertEquals(2, cat.items().size());
+
+        CatalogItem i0 = cat.items().get(0);
+        assertEquals("Épée longue", i0.getName());
+        assertEquals("15 po", i0.getPrice());
+        assertEquals("Armes", i0.getCategory());
+        assertEquals("Tranchante", i0.getDescription());
+
+        CatalogItem i1 = cat.items().get(1);
+        assertEquals("Potion", i1.getName());
+        assertNull(i1.getPrice());
+        assertNull(i1.getCategory());
+        assertNull(i1.getDescription());
+    }
+
+    @Test
+    void generate_nameAbsent_fallbackSurDescription() {
+        Map<String, Object> resp = new LinkedHashMap<>();
+        resp.put("items", List.of(item("Objet", null, null, null)));
+        // pas de "name" -> fallback description
+
+        when(rt.postForObject(anyString(), any(), eq(Map.class))).thenReturn(resp);
+
+        GeneratedCatalog cat = client.generate("MaDescription", "ctx");
+        assertEquals("MaDescription", cat.name());
+        assertNull(cat.description());
+    }
+
+    @Test
+    void generate_nameBlank_fallbackSurDescription() {
+        Map<String, Object> resp = new LinkedHashMap<>();
+        resp.put("name", "  ");
+        resp.put("items", List.of(item("Objet", null, null, null)));
+
+        when(rt.postForObject(anyString(), any(), eq(Map.class))).thenReturn(resp);
+
+        GeneratedCatalog cat = client.generate("Fallback", "ctx");
+        assertEquals("Fallback", cat.name());
+    }
+
+    @Test
+    void generate_argumentsNull_remplisParDefauts() {
+        Map<String, Object> resp = new LinkedHashMap<>();
+        resp.put("name", "Cat");
+        resp.put("items", List.of(item("Objet", null, null, null)));
+
+        when(rt.postForObject(anyString(), any(), eq(Map.class))).thenReturn(resp);
+
+        GeneratedCatalog cat = client.generate(null, null);
+        assertEquals("Cat", cat.name());
+    }
+
+    // ---------- generate : réponse vide / pas d'items ----------
+
+    @Test
+    void generate_reponseNull_leveException() {
+        when(rt.postForObject(anyString(), any(), eq(Map.class))).thenReturn(null);
+
+        ItemCatalogGenerationException ex = assertThrows(ItemCatalogGenerationException.class,
+                () -> client.generate("d", "c"));
+        assertTrue(ex.getMessage().contains("réponse vide"));
+    }
+
+    @Test
+    void generate_itemsAbsents_leveException() {
+        Map<String, Object> resp = new LinkedHashMap<>();
+        resp.put("name", "Cat"); // pas de "items"
+
+        when(rt.postForObject(anyString(), any(), eq(Map.class))).thenReturn(resp);
+
+        ItemCatalogGenerationException ex = assertThrows(ItemCatalogGenerationException.class,
+                () -> client.generate("d", "c"));
+        assertTrue(ex.getMessage().contains("Aucun objet"));
+    }
+
+    @Test
+    void generate_itemsVide_leveException() {
+        Map<String, Object> resp = new LinkedHashMap<>();
+        resp.put("items", new ArrayList<>());
+
+        when(rt.postForObject(anyString(), any(), eq(Map.class))).thenReturn(resp);
+
+        assertThrows(ItemCatalogGenerationException.class, () -> client.generate("d", "c"));
+    }
+
+    @Test
+    void generate_tousItemsInvalides_leveException() {
+        Map<String, Object> resp = new LinkedHashMap<>();
+        resp.put("items", List.of(item(null, null, null, null)));
+
+        when(rt.postForObject(anyString(), any(), eq(Map.class))).thenReturn(resp);
+
+        assertThrows(ItemCatalogGenerationException.class, () -> client.generate("d", "c"));
+    }
+
+    // ---------- generate : branches du catch ----------
+
+    @Test
+    void generate_brainInjoignable_resourceAccess() {
+        when(rt.postForObject(anyString(), any(), eq(Map.class)))
+                .thenThrow(new ResourceAccessException("down"));
+
+        ItemCatalogGenerationException ex = assertThrows(ItemCatalogGenerationException.class,
+                () -> client.generate("d", "c"));
+        assertTrue(ex.getMessage().contains("injoignable"));
+        assertInstanceOf(ResourceAccessException.class, ex.getCause());
+    }
+
+    @Test
+    void generate_erreurHttp_restClientResponse() {
+        when(rt.postForObject(anyString(), any(), eq(Map.class)))
+                .thenThrow(HttpServerErrorException.create(
+                        HttpStatus.BAD_GATEWAY, "Bad Gateway", new HttpHeaders(), new byte[0], null));
+
+        ItemCatalogGenerationException ex = assertThrows(ItemCatalogGenerationException.class,
+                () -> client.generate("d", "c"));
+        assertTrue(ex.getMessage().contains("HTTP 502"));
+    }
+
+    @Test
+    void generate_erreurInattendue_exceptionGenerique() {
+        when(rt.postForObject(anyString(), any(), eq(Map.class)))
+                .thenThrow(new IllegalStateException("boom"));
+
+        ItemCatalogGenerationException ex = assertThrows(ItemCatalogGenerationException.class,
+                () -> client.generate("d", "c"));
+        assertTrue(ex.getMessage().contains("inattendue"));
+        assertInstanceOf(IllegalStateException.class, ex.getCause());
+    }
+}
diff --git a/core/src/test/java/com/loremind/infrastructure/ai/BrainMultipartFilenameTest.java b/core/src/test/java/com/loremind/infrastructure/ai/BrainMultipartFilenameTest.java
new file mode 100644
index 0000000..5a16b6d
--- /dev/null
+++ b/core/src/test/java/com/loremind/infrastructure/ai/BrainMultipartFilenameTest.java
@@ -0,0 +1,127 @@
+package com.loremind.infrastructure.ai;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.jupiter.api.Test;
+import org.mockito.ArgumentCaptor;
+import org.springframework.core.io.Resource;
+import org.springframework.core.io.buffer.DataBufferUtils;
+import org.springframework.http.HttpEntity;
+import org.springframework.mock.http.client.reactive.MockClientHttpRequest;
+import org.springframework.util.MultiValueMap;
+import org.springframework.web.client.RestTemplate;
+import org.springframework.web.reactive.function.client.ClientResponse;
+import org.springframework.web.reactive.function.client.ExchangeFunction;
+import org.springframework.web.reactive.function.client.ExchangeStrategies;
+import org.springframework.web.reactive.function.client.WebClient;
+import reactor.core.publisher.Mono;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+
+/**
+ * Couvre les sous-classes anonymes {@code new ByteArrayResource(){ getFilename() }}
+ * des clients d'upload multipart : leur {@code getFilename()} (nom par défaut si
+ * absent/vide) n'est appelé que lors de la SÉRIALISATION du corps, qui n'a pas lieu
+ * quand le transport est mocké. On la déclenche donc explicitement :
+ * <ul>
+ *   <li>clients RestTemplate : on capture le {@link HttpEntity} envoyé et on lit la
+ *       ressource « file » pour appeler {@code getFilename()} ;</li>
+ *   <li>clients WebClient : l'{@link ExchangeFunction} sérialise réellement le corps
+ *       multipart dans un {@link MockClientHttpRequest} (ce qui invoque getFilename).</li>
+ * </ul>
+ */
+class BrainMultipartFilenameTest {
+
+    // --- Helpers ------------------------------------------------------------
+
+    /** ExchangeFunction qui sérialise le corps de la requête (déclenche getFilename) puis renvoie un SSE 'done'. */
+    private static ExchangeFunction serializingExchange(String sse) {
+        return request -> {
+            MockClientHttpRequest mock = new MockClientHttpRequest(request.method(), request.url());
+            // Le write-handler par défaut ne souscrit pas au corps : on draine donc le
+            // flux nous-mêmes pour forcer l'écriture des parts (et l'appel à getFilename).
+            mock.setWriteHandler(body -> DataBufferUtils.join(body)
+                    .doOnNext(DataBufferUtils::release).then());
+            request.writeTo(mock, ExchangeStrategies.withDefaults()).block();
+            return Mono.just(ClientResponse.create(org.springframework.http.HttpStatus.OK)
+                    .header(org.springframework.http.HttpHeaders.CONTENT_TYPE,
+                            org.springframework.http.MediaType.TEXT_EVENT_STREAM_VALUE)
+                    .body(sse)
+                    .build());
+        };
+    }
+
+    @SuppressWarnings("unchecked")
+    private static String capturedFilename(RestTemplate rt) {
+        ArgumentCaptor<HttpEntity> cap = ArgumentCaptor.forClass(HttpEntity.class);
+        verify(rt).postForObject(anyString(), cap.capture(), any());
+        MultiValueMap<String, Object> body = (MultiValueMap<String, Object>) cap.getValue().getBody();
+        return ((Resource) body.getFirst("file")).getFilename();
+    }
+
+    // --- BrainNotebookIndexClient (RestTemplate) ----------------------------
+
+    @Test
+    void notebookIndex_filePart_usesGivenFilename_elseDefault() {
+        RestTemplate rt = mock(RestTemplate.class);
+        BrainNotebookIndexClient client = new BrainNotebookIndexClient(rt, "http://brain");
+
+        try { client.index("src-1", new byte[]{1, 2}, "doc.pdf"); } catch (RuntimeException ignored) { }
+        assertEquals("doc.pdf", capturedFilename(rt));
+
+        RestTemplate rt2 = mock(RestTemplate.class);
+        BrainNotebookIndexClient client2 = new BrainNotebookIndexClient(rt2, "http://brain");
+        try { client2.index("src-1", new byte[]{1, 2}, null); } catch (RuntimeException ignored) { }
+        assertEquals("source.pdf", capturedFilename(rt2));
+    }
+
+    // --- BrainRulesImportClient (RestTemplate one-shot) ---------------------
+
+    @Test
+    void rulesImport_filePart_usesGivenFilename_elseDefault() {
+        RestTemplate rt = mock(RestTemplate.class);
+        BrainRulesImportClient client = new BrainRulesImportClient(
+                rt, WebClient.builder(), new ObjectMapper(), "http://brain", 600);
+
+        try { client.importRules(new byte[]{1, 2}, "regles.pdf"); } catch (RuntimeException ignored) { }
+        assertEquals("regles.pdf", capturedFilename(rt));
+
+        RestTemplate rt2 = mock(RestTemplate.class);
+        BrainRulesImportClient client2 = new BrainRulesImportClient(
+                rt2, WebClient.builder(), new ObjectMapper(), "http://brain", 600);
+        try { client2.importRules(new byte[]{1, 2}, "  "); } catch (RuntimeException ignored) { }
+        assertEquals("rules.pdf", capturedFilename(rt2));
+    }
+
+    // --- BrainCampaignAdaptClient (WebClient multipart) ---------------------
+
+    @Test
+    void campaignAdapt_filePart_serializedFilename() {
+        ExchangeFunction ef = serializingExchange("event:done\ndata:{}\n\n");
+        BrainCampaignAdaptClient client = new BrainCampaignAdaptClient(
+                WebClient.builder().exchangeFunction(ef), new ObjectMapper(), "http://brain", 30);
+
+        // filename présent puis null : les deux branches de getFilename sont sérialisées.
+        client.adviseStreaming(new byte[]{1, 2}, "doc.pdf", "brief", "[]",
+                t -> { }, () -> { }, e -> { });
+        client.adviseStreaming(new byte[]{1, 2}, null, null, null,
+                t -> { }, () -> { }, e -> { });
+    }
+
+    // --- BrainCampaignImportClient (WebClient multipart) --------------------
+
+    @Test
+    void campaignImport_filePart_serializedFilename() {
+        ExchangeFunction ef = serializingExchange("event:done\ndata:{\"sections\":{}}\n\n");
+        BrainCampaignImportClient client = new BrainCampaignImportClient(
+                WebClient.builder().exchangeFunction(ef), new ObjectMapper(), "http://brain", 30);
+
+        client.importCampaignStreaming(new byte[]{1, 2}, "doc.pdf",
+                p -> { }, () -> { }, s -> { }, r -> { }, e -> { });
+        client.importCampaignStreaming(new byte[]{1, 2}, null,
+                p -> { }, () -> { }, s -> { }, r -> { }, e -> { });
+    }
+}
diff --git a/core/src/test/java/com/loremind/infrastructure/ai/BrainNotebookChatClientTest.java b/core/src/test/java/com/loremind/infrastructure/ai/BrainNotebookChatClientTest.java
new file mode 100644
index 0000000..c18e1fd
--- /dev/null
+++ b/core/src/test/java/com/loremind/infrastructure/ai/BrainNotebookChatClientTest.java
@@ -0,0 +1,201 @@
+package com.loremind.infrastructure.ai;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.loremind.domain.campaigncontext.ports.NotebookChatStreamer.Msg;
+import com.loremind.domain.campaigncontext.ports.NotebookChatStreamer.Progress;
+import com.loremind.domain.campaigncontext.ports.NotebookException;
+import org.junit.jupiter.api.Test;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.web.reactive.function.client.ClientResponse;
+import org.springframework.web.reactive.function.client.ExchangeFunction;
+import org.springframework.web.reactive.function.client.WebClient;
+import reactor.core.publisher.Mono;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicReference;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * Tests unitaires PURS (JUnit 5 + Mockito-less) pour {@link BrainNotebookChatClient}.
+ * On injecte un WebClient.Builder dont l'ExchangeFunction renvoie un corps SSE canned :
+ * aucun réseau n'est sollicité.
+ */
+class BrainNotebookChatClientTest {
+
+    private static final ObjectMapper MAPPER = new ObjectMapper();
+
+    /** Construit un client dont le WebClient renvoie le corps SSE fourni. */
+    private BrainNotebookChatClient clientReturning(String sseBody) {
+        ExchangeFunction ef = req -> Mono.just(
+                ClientResponse.create(HttpStatus.OK)
+                        .header(HttpHeaders.CONTENT_TYPE, MediaType.TEXT_EVENT_STREAM_VALUE)
+                        .body(sseBody)
+                        .build());
+        WebClient.Builder builder = WebClient.builder().exchangeFunction(ef);
+        return new BrainNotebookChatClient(builder, MAPPER, "http://brain", 30);
+    }
+
+    /** Construit un client dont le transport échoue immédiatement. */
+    private BrainNotebookChatClient clientFailingWith(Throwable boom) {
+        ExchangeFunction ef = req -> Mono.error(boom);
+        WebClient.Builder builder = WebClient.builder().exchangeFunction(ef);
+        return new BrainNotebookChatClient(builder, MAPPER, "http://brain", 30);
+    }
+
+    /** Collecteur réutilisable pour les callbacks. */
+    private static final class Collector {
+        final AtomicReference<String> sources = new AtomicReference<>();
+        final StringBuilder tokens = new StringBuilder();
+        final List<Progress> progresses = new ArrayList<>();
+        final AtomicBoolean done = new AtomicBoolean(false);
+        final AtomicReference<Throwable> error = new AtomicReference<>();
+
+        void invoke(BrainNotebookChatClient client, boolean deep) {
+            client.stream(
+                    List.of("s1", "s2"),
+                    List.of(new Msg("user", "Bonjour")),
+                    "ctx",
+                    deep,
+                    sources::set,
+                    tokens::append,
+                    progresses::add,
+                    () -> done.set(true),
+                    error::set);
+        }
+    }
+
+    @Test
+    void streame_tous_les_events_token_sources_progress_done() {
+        // SSE déclenchant chaque branche de handleEvent : sources, progress, token, done.
+        String sse =
+                "event:sources\ndata:{\"passages\":[1,2]}\n\n" +
+                "event:progress\ndata:{\"current\":2,\"total\":5}\n\n" +
+                "event:token\ndata:{\"token\":\"Salut\"}\n\n" +
+                "event:token\ndata:{\"token\":\" toi\"}\n\n" +
+                "event:done\ndata:{}\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse), true);
+
+        assertEquals("{\"passages\":[1,2]}", c.sources.get(), "JSON sources relayé brut");
+        assertEquals("Salut toi", c.tokens.toString(), "tokens concaténés dans l'ordre");
+        assertEquals(1, c.progresses.size());
+        assertEquals(2, c.progresses.get(0).current());
+        assertEquals(5, c.progresses.get(0).total());
+        assertTrue(c.done.get(), "onDone appelé via event done");
+        assertNull(c.error.get());
+    }
+
+    @Test
+    void token_vide_ou_absent_ignore() {
+        // token vide -> non émis ; token absent -> readField null -> non émis.
+        String sse =
+                "event:token\ndata:{\"token\":\"\"}\n\n" +
+                "event:token\ndata:{\"foo\":\"bar\"}\n\n" +
+                "event:token\ndata:{\"token\":\"X\"}\n\n" +
+                "event:done\ndata:{}\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse), false);
+
+        assertEquals("X", c.tokens.toString(), "seul le token non vide est émis");
+        assertTrue(c.done.get());
+    }
+
+    @Test
+    void progress_avec_json_invalide_donne_zero() {
+        // data non-JSON -> readInt catch -> 0/0 (couvre la branche d'exception).
+        String sse =
+                "event:progress\ndata:pas-du-json\n\n" +
+                "event:done\ndata:{}\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse), true);
+
+        assertEquals(1, c.progresses.size());
+        assertEquals(0, c.progresses.get(0).current());
+        assertEquals(0, c.progresses.get(0).total());
+    }
+
+    @Test
+    void event_error_appelle_onError_avec_NotebookException() {
+        String sse =
+                "event:token\ndata:{\"token\":\"avant\"}\n\n" +
+                "event:error\ndata:{\"message\":\"oups modèle\"}\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse), false);
+
+        assertNotNull(c.error.get());
+        assertInstanceOf(NotebookException.class, c.error.get());
+        assertTrue(c.error.get().getMessage().contains("oups modèle"));
+        assertFalse(c.done.get(), "onDone non appelé après un error terminal");
+    }
+
+    @Test
+    void event_error_sans_message_relaie_data_brut() {
+        // readMessage : pas de champ message -> renvoie data brut.
+        String sse = "event:error\ndata:erreur-brute\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse), false);
+
+        assertNotNull(c.error.get());
+        assertTrue(c.error.get().getMessage().contains("erreur-brute"));
+    }
+
+    @Test
+    void flux_termine_sans_done_appelle_onDone() {
+        // Aucun event done/error -> terminated reste false -> onDone() de secours.
+        String sse = "event:token\ndata:{\"token\":\"fin\"}\n\n";
+        Collector c = new Collector();
+        c.invoke(clientReturning(sse), false);
+
+        assertEquals("fin", c.tokens.toString());
+        assertTrue(c.done.get(), "onDone de secours appelé pour flux clos sans done");
+        assertNull(c.error.get());
+    }
+
+    @Test
+    void erreur_transport_traduite_en_NotebookException() {
+        Collector c = new Collector();
+        c.invoke(clientFailingWith(new RuntimeException("boom")), false);
+
+        assertNotNull(c.error.get());
+        assertInstanceOf(NotebookException.class, c.error.get());
+        assertTrue(c.error.get().getMessage().contains("boom"));
+        assertFalse(c.done.get());
+    }
+
+    @Test
+    void context_null_est_accepte() {
+        // Couvre la branche context == null -> "" lors de la construction du payload.
+        String sse = "event:done\ndata:{}\n\n";
+        ExchangeFunction ef = req -> Mono.just(
+                ClientResponse.create(HttpStatus.OK)
+                        .header(HttpHeaders.CONTENT_TYPE, MediaType.TEXT_EVENT_STREAM_VALUE)
+                        .body(sse)
+                        .build());
+        BrainNotebookChatClient client =
+                new BrainNotebookChatClient(WebClient.builder().exchangeFunction(ef), MAPPER, "http://brain", 30);
+
+        AtomicBoolean done = new AtomicBoolean(false);
+        client.stream(
+                List.of("s1"),
+                List.of(new Msg("user", "hi")),
+                null,
+                false,
+                json -> {},
+                tok -> {},
+                p -> {},
+                () -> done.set(true),
+                err -> {});
+
+        assertTrue(done.get());
+    }
+}
diff --git a/core/src/test/java/com/loremind/infrastructure/ai/BrainNotebookIndexClientTest.java b/core/src/test/java/com/loremind/infrastructure/ai/BrainNotebookIndexClientTest.java
new file mode 100644
index 0000000..d454348
--- /dev/null
+++ b/core/src/test/java/com/loremind/infrastructure/ai/BrainNotebookIndexClientTest.java
@@ -0,0 +1,166 @@
+package com.loremind.infrastructure.ai;
+
+import com.loremind.domain.campaigncontext.ports.NotebookException;
+import com.loremind.domain.campaigncontext.ports.NotebookIndexer.IndexResult;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.ArgumentCaptor;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.client.HttpServerErrorException;
+import org.springframework.web.client.ResourceAccessException;
+import org.springframework.web.client.RestTemplate;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.doThrow;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+/**
+ * Tests unitaires purs (JUnit 5 + Mockito, sans Spring/réseau) de
+ * {@link BrainNotebookIndexClient} : indexation multipart one-shot (RestTemplate)
+ * et suppression best-effort.
+ * <p>
+ * {@code IndexResponse} étant une classe privée de l'adapter, on l'instancie par
+ * réflexion pour piloter la valeur renvoyée par le mock RestTemplate.
+ */
+class BrainNotebookIndexClientTest {
+
+    private static final String BASE_URL = "http://brain";
+
+    private RestTemplate restTemplate;
+    private BrainNotebookIndexClient client;
+
+    @BeforeEach
+    void setUp() {
+        restTemplate = mock(RestTemplate.class);
+        client = new BrainNotebookIndexClient(restTemplate, BASE_URL);
+    }
+
+    /** Récupère la Class<?> de l'IndexResponse privée (telle qu'attendue par postForObject). */
+    private Class<?> indexResponseClass() throws ClassNotFoundException {
+        return Class.forName("com.loremind.infrastructure.ai.BrainNotebookIndexClient$IndexResponse");
+    }
+
+    /** Instancie l'IndexResponse privée et remplit ses champs par réflexion. */
+    private Object newIndexResponse(int chunks, int pageCount, int ocrPageCount) throws Exception {
+        Class<?> cls = indexResponseClass();
+        Constructor<?> ctor = cls.getDeclaredConstructor();
+        ctor.setAccessible(true);
+        Object resp = ctor.newInstance();
+        setField(resp, "chunks", chunks);
+        setField(resp, "pageCount", pageCount);
+        setField(resp, "ocrPageCount", ocrPageCount);
+        return resp;
+    }
+
+    private void setField(Object target, String name, int value) throws Exception {
+        Field f = target.getClass().getDeclaredField(name);
+        f.setAccessible(true);
+        f.setInt(target, value);
+    }
+
+    // --- index() -------------------------------------------------------------
+
+    @Test
+    @SuppressWarnings("unchecked")
+    void index_succes_retourneIndexResult() throws Exception {
+        Object wire = newIndexResponse(42, 100, 7);
+        // doReturn évite l'inférence générique (Class<?> -> wildcard) qui casse thenReturn.
+        doReturn(wire).when(restTemplate)
+                .postForObject(anyString(), any(), eq(indexResponseClass()));
+
+        IndexResult result = client.index("src-1", new byte[]{1, 2, 3}, "livre.pdf");
+
+        assertEquals(42, result.chunks());
+        assertEquals(100, result.pageCount());
+        assertEquals(7, result.ocrPageCount());
+
+        // L'URL appelée concatène baseUrl + INDEX_PATH.
+        ArgumentCaptor<String> url = ArgumentCaptor.forClass(String.class);
+        verify(restTemplate).postForObject(url.capture(), any(), eq(indexResponseClass()));
+        assertEquals(BASE_URL + "/index/notebook-source", url.getValue());
+    }
+
+    @Test
+    void index_filenameNull_utiliseNomParDefaut() throws Exception {
+        Object wire = newIndexResponse(1, 1, 0);
+        doReturn(wire).when(restTemplate)
+                .postForObject(anyString(), any(), eq(indexResponseClass()));
+
+        // filename null/blank -> branche "source.pdf" du filePart.
+        IndexResult result = client.index("src-1", new byte[]{9}, null);
+        assertEquals(1, result.chunks());
+    }
+
+    @Test
+    void index_reponseNull_leveNotebookException() {
+        when(restTemplate.postForObject(anyString(), any(), any(Class.class)))
+                .thenReturn(null);
+
+        NotebookException ex = assertThrows(NotebookException.class,
+                () -> client.index("src-1", new byte[]{1}, "f.pdf"));
+        assertTrue(ex.getMessage().contains("vide"));
+    }
+
+    @Test
+    void index_resourceAccess_leveNotebookException() {
+        when(restTemplate.postForObject(anyString(), any(), any(Class.class)))
+                .thenThrow(new ResourceAccessException("timeout"));
+
+        NotebookException ex = assertThrows(NotebookException.class,
+                () -> client.index("src-1", new byte[]{1}, "f.pdf"));
+        assertTrue(ex.getMessage().contains("injoignable"));
+    }
+
+    @Test
+    void index_httpServerError_leveNotebookExceptionAvecStatut() {
+        HttpServerErrorException http = HttpServerErrorException.create(
+                HttpStatus.BAD_GATEWAY, "Bad Gateway", new HttpHeaders(), new byte[0], null);
+        when(restTemplate.postForObject(anyString(), any(), any(Class.class)))
+                .thenThrow(http);
+
+        NotebookException ex = assertThrows(NotebookException.class,
+                () -> client.index("src-1", new byte[]{1}, "f.pdf"));
+        assertTrue(ex.getMessage().contains("502"));
+    }
+
+    @Test
+    void index_erreurInattendue_leveNotebookException() {
+        when(restTemplate.postForObject(anyString(), any(), any(Class.class)))
+                .thenThrow(new IllegalStateException("boom"));
+
+        NotebookException ex = assertThrows(NotebookException.class,
+                () -> client.index("src-1", new byte[]{1}, "f.pdf"));
+        assertTrue(ex.getMessage().contains("inattendue"));
+    }
+
+    // --- delete() ------------------------------------------------------------
+
+    @Test
+    void delete_appelleRestTemplateAvecBonneUrl() {
+        client.delete("src-99");
+        verify(restTemplate).delete(BASE_URL + "/index/notebook-source/src-99");
+    }
+
+    @Test
+    void delete_erreurIgnoree_neRelancePas() {
+        // Best-effort : une exception du RestTemplate est avalée (log warn).
+        doThrow(new ResourceAccessException("down"))
+                .when(restTemplate).delete(anyString());
+
+        // Ne doit pas lever.
+        client.delete("src-99");
+        verify(restTemplate).delete(BASE_URL + "/index/notebook-source/src-99");
+    }
+}
diff --git a/core/src/test/java/com/loremind/infrastructure/ai/BrainRandomTableClientTest.java b/core/src/test/java/com/loremind/infrastructure/ai/BrainRandomTableClientTest.java
new file mode 100644
index 0000000..3a64043
--- /dev/null
+++ b/core/src/test/java/com/loremind/infrastructure/ai/BrainRandomTableClientTest.java
@@ -0,0 +1,269 @@
+package com.loremind.infrastructure.ai;
+
+import com.loremind.domain.campaigncontext.RandomTableEntry;
+import com.loremind.domain.campaigncontext.ports.RandomTableGenerationException;
+import com.loremind.domain.campaigncontext.ports.RandomTableGenerator.GeneratedTable;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.client.HttpServerErrorException;
+import org.springframework.web.client.ResourceAccessException;
+import org.springframework.web.client.RestTemplate;
+
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+/**
+ * Tests unitaires purs (JUnit 5 + Mockito, sans Spring) de {@link BrainRandomTableClient}.
+ * Le RestTemplate est mocké : {@code postForObject(url, entity, Map.class)}.
+ */
+class BrainRandomTableClientTest {
+
+    private RestTemplate rt;
+    private BrainRandomTableClient client;
+
+    @BeforeEach
+    void setUp() {
+        rt = mock(RestTemplate.class);
+        client = new BrainRandomTableClient(rt, "http://brain");
+    }
+
+    /** Construit une map d'entrée pour le payload "entries". */
+    private static Map<String, Object> entry(Object min, Object max, Object label, Object detail) {
+        Map<String, Object> m = new LinkedHashMap<>();
+        m.put("min_roll", min);
+        m.put("max_roll", max);
+        m.put("label", label);
+        m.put("detail", detail);
+        return m;
+    }
+
+    // ---------- generate : cas nominal et branches de parsing ----------
+
+    @Test
+    void generate_reponseValide_plusieursEntrees_avecEntreesInvalidesIgnorees() {
+        List<Object> entries = new ArrayList<>();
+        entries.add(entry(1, 5, "Embuscade", "des gobelins"));         // valide (Number)
+        entries.add(entry("6", "10", "Trésor", null));                 // valide (String -> asInt)
+        entries.add(entry(null, 3, "min null", "x"));                  // ignorée : min null
+        entries.add(entry(3, null, "max null", "x"));                  // ignorée : max null
+        entries.add(entry(1, 2, null, "x"));                          // ignorée : label null
+        entries.add(entry(1, 2, "   ", "x"));                         // ignorée : label blank
+        entries.add(entry("abc", 2, "min non-num", "x"));             // ignorée : asInt String non-numérique
+        entries.add("pas une map");                                   // ignorée : item non-Map
+
+        Map<String, Object> resp = new LinkedHashMap<>();
+        resp.put("name", "Table des rencontres");
+        resp.put("description", "En forêt");
+        resp.put("entries", entries);
+
+        when(rt.postForObject(anyString(), any(), eq(Map.class))).thenReturn(resp);
+
+        GeneratedTable table = client.generate("desc", "1d10", "ctx");
+
+        assertEquals("Table des rencontres", table.name());
+        assertEquals("En forêt", table.description());
+        assertEquals(2, table.entries().size());
+
+        RandomTableEntry e0 = table.entries().get(0);
+        assertEquals(1, e0.getMinRoll());
+        assertEquals(5, e0.getMaxRoll());
+        assertEquals("Embuscade", e0.getLabel());
+        assertEquals("des gobelins", e0.getDetail());
+
+        RandomTableEntry e1 = table.entries().get(1);
+        assertEquals(6, e1.getMinRoll());
+        assertEquals(10, e1.getMaxRoll());
+        assertEquals("Trésor", e1.getLabel());
+        assertNull(e1.getDetail()); // detail null -> asString(null) == null
+    }
+
+    @Test
+    void generate_maxInferieurAMin_estCorrigeParMathMax() {
+        Map<String, Object> resp = new LinkedHashMap<>();
+        resp.put("entries", List.of(entry(8, 3, "Inversé", null)));
+
+        when(rt.postForObject(anyString(), any(), eq(Map.class))).thenReturn(resp);
+
+        GeneratedTable table = client.generate("d", "1d8", "c");
+        RandomTableEntry e = table.entries().get(0);
+        assertEquals(8, e.getMinRoll());
+        assertEquals(8, e.getMaxRoll()); // Math.max(8,3) == 8
+    }
+
+    @Test
+    void generate_nameAbsent_fallbackSurDescription() {
+        Map<String, Object> resp = new LinkedHashMap<>();
+        resp.put("entries", List.of(entry(1, 1, "Ok", null)));
+        // pas de "name" -> asString(null) == null -> fallback description
+
+        when(rt.postForObject(anyString(), any(), eq(Map.class))).thenReturn(resp);
+
+        GeneratedTable table = client.generate("MaDescription", "1d20", "c");
+        assertEquals("MaDescription", table.name());
+        assertNull(table.description()); // description absente
+    }
+
+    @Test
+    void generate_nameBlank_fallbackSurDescription() {
+        Map<String, Object> resp = new LinkedHashMap<>();
+        resp.put("name", "   ");
+        resp.put("entries", List.of(entry(1, 1, "Ok", null)));
+
+        when(rt.postForObject(anyString(), any(), eq(Map.class))).thenReturn(resp);
+
+        GeneratedTable table = client.generate("Fallback", "1d20", "c");
+        assertEquals("Fallback", table.name());
+    }
+
+    @Test
+    void generate_argumentsNull_remplisParDefauts_etAppelle() {
+        Map<String, Object> resp = new LinkedHashMap<>();
+        resp.put("name", "T");
+        resp.put("entries", List.of(entry(1, 1, "Ok", null)));
+
+        when(rt.postForObject(anyString(), any(), eq(Map.class))).thenReturn(resp);
+
+        // description/diceFormula/context null -> branches de défaut couvertes
+        GeneratedTable table = client.generate(null, null, null);
+        assertEquals("T", table.name());
+    }
+
+    @Test
+    void generate_reponseNull_leveException() {
+        when(rt.postForObject(anyString(), any(), eq(Map.class))).thenReturn(null);
+
+        RandomTableGenerationException ex = assertThrows(RandomTableGenerationException.class,
+                () -> client.generate("d", "1d20", "c"));
+        assertTrue(ex.getMessage().contains("réponse vide"));
+    }
+
+    @Test
+    void generate_entriesAbsentes_aucuneEntree_leveException() {
+        Map<String, Object> resp = new LinkedHashMap<>();
+        resp.put("name", "T");
+        // pas de "entries" -> rawEntries null, pas un List<?>
+
+        when(rt.postForObject(anyString(), any(), eq(Map.class))).thenReturn(resp);
+
+        RandomTableGenerationException ex = assertThrows(RandomTableGenerationException.class,
+                () -> client.generate("d", "1d20", "c"));
+        assertTrue(ex.getMessage().contains("Aucune entrée"));
+    }
+
+    @Test
+    void generate_entriesVide_leveException() {
+        Map<String, Object> resp = new LinkedHashMap<>();
+        resp.put("entries", new ArrayList<>()); // List mais vide
+
+        when(rt.postForObject(anyString(), any(), eq(Map.class))).thenReturn(resp);
+
+        RandomTableGenerationException ex = assertThrows(RandomTableGenerationException.class,
+                () -> client.generate("d", "1d20", "c"));
+        assertTrue(ex.getMessage().contains("Aucune entrée"));
+    }
+
+    @Test
+    void generate_toutesEntreesInvalides_leveException() {
+        Map<String, Object> resp = new LinkedHashMap<>();
+        resp.put("entries", List.of(entry(null, null, null, null)));
+
+        when(rt.postForObject(anyString(), any(), eq(Map.class))).thenReturn(resp);
+
+        assertThrows(RandomTableGenerationException.class,
+                () -> client.generate("d", "1d20", "c"));
+    }
+
+    // ---------- generate : branches du catch ----------
+
+    @Test
+    void generate_brainInjoignable_resourceAccess() {
+        when(rt.postForObject(anyString(), any(), eq(Map.class)))
+                .thenThrow(new ResourceAccessException("down"));
+
+        RandomTableGenerationException ex = assertThrows(RandomTableGenerationException.class,
+                () -> client.generate("d", "1d20", "c"));
+        assertTrue(ex.getMessage().contains("injoignable"));
+        assertInstanceOf(ResourceAccessException.class, ex.getCause());
+    }
+
+    @Test
+    void generate_erreurHttp_restClientResponse() {
+        when(rt.postForObject(anyString(), any(), eq(Map.class)))
+                .thenThrow(HttpServerErrorException.create(
+                        HttpStatus.BAD_GATEWAY, "Bad Gateway", new HttpHeaders(), new byte[0], null));
+
+        RandomTableGenerationException ex = assertThrows(RandomTableGenerationException.class,
+                () -> client.generate("d", "1d20", "c"));
+        assertTrue(ex.getMessage().contains("HTTP 502"));
+    }
+
+    @Test
+    void generate_erreurInattendue_exceptionGenerique() {
+        when(rt.postForObject(anyString(), any(), eq(Map.class)))
+                .thenThrow(new IllegalStateException("boom"));
+
+        RandomTableGenerationException ex = assertThrows(RandomTableGenerationException.class,
+                () -> client.generate("d", "1d20", "c"));
+        assertTrue(ex.getMessage().contains("inattendue"));
+        assertInstanceOf(IllegalStateException.class, ex.getCause());
+    }
+
+    // ---------- improvise ----------
+
+    @Test
+    void improvise_narrationPresente_retourneNarration() {
+        Map<String, Object> resp = new LinkedHashMap<>();
+        resp.put("narration", "Les gobelins surgissent des fourrés.");
+
+        when(rt.postForObject(anyString(), any(), eq(Map.class))).thenReturn(resp);
+
+        String out = client.improvise("Table", "Embuscade", "détail", "ctx");
+        assertEquals("Les gobelins surgissent des fourrés.", out);
+    }
+
+    @Test
+    void improvise_argumentsNull_remplisParDefauts() {
+        Map<String, Object> resp = new LinkedHashMap<>();
+        resp.put("narration", "ok");
+
+        when(rt.postForObject(anyString(), any(), eq(Map.class))).thenReturn(resp);
+
+        assertEquals("ok", client.improvise(null, null, null, null));
+    }
+
+    @Test
+    void improvise_reponseNull_retourneChaineVide() {
+        when(rt.postForObject(anyString(), any(), eq(Map.class))).thenReturn(null);
+
+        assertEquals("", client.improvise("T", "L", "D", "C"));
+    }
+
+    @Test
+    void improvise_narrationAbsente_retourneChaineVide() {
+        Map<String, Object> resp = new LinkedHashMap<>(); // pas de "narration"
+
+        when(rt.postForObject(anyString(), any(), eq(Map.class))).thenReturn(resp);
+
+        assertEquals("", client.improvise("T", "L", "D", "C"));
+    }
+
+    @Test
+    void improvise_brainInjoignable_propageException() {
+        when(rt.postForObject(anyString(), any(), eq(Map.class)))
+                .thenThrow(new ResourceAccessException("down"));
+
+        assertThrows(RandomTableGenerationException.class,
+                () -> client.improvise("T", "L", "D", "C"));
+    }
+}
diff --git a/core/src/test/java/com/loremind/infrastructure/ai/BrainRulesImportClientTest.java b/core/src/test/java/com/loremind/infrastructure/ai/BrainRulesImportClientTest.java
new file mode 100644
index 0000000..6b629da
--- /dev/null
+++ b/core/src/test/java/com/loremind/infrastructure/ai/BrainRulesImportClientTest.java
@@ -0,0 +1,334 @@
+package com.loremind.infrastructure.ai;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.loremind.domain.gamesystemcontext.RulesImportProgress;
+import com.loremind.domain.gamesystemcontext.RulesImportResult;
+import com.loremind.domain.gamesystemcontext.ports.RulesImportException;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.web.client.HttpServerErrorException;
+import org.springframework.web.client.ResourceAccessException;
+import org.springframework.web.client.RestTemplate;
+import org.springframework.web.reactive.function.client.ClientResponse;
+import org.springframework.web.reactive.function.client.ExchangeFunction;
+import org.springframework.web.reactive.function.client.WebClient;
+import reactor.core.publisher.Mono;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicReference;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+/**
+ * Tests unitaires purs (JUnit 5 + Mockito, sans Spring/réseau) de
+ * {@link BrainRulesImportClient} :
+ *  - one-shot via RestTemplate (importRules) ;
+ *  - streaming SSE via WebClient + ExchangeFunction (importRulesStreaming).
+ * Couvre aussi indirectement les getters du DTO {@link BrainRulesImportResponse}.
+ */
+class BrainRulesImportClientTest {
+
+    private static final String BASE_URL = "http://brain";
+
+    private RestTemplate restTemplate;
+    private ObjectMapper objectMapper;
+
+    @BeforeEach
+    void setUp() {
+        restTemplate = mock(RestTemplate.class);
+        objectMapper = new ObjectMapper();
+    }
+
+    /** Construit le client avec un WebClient câblé sur l'ExchangeFunction fournie. */
+    private BrainRulesImportClient client(ExchangeFunction ef) {
+        WebClient.Builder builder = WebClient.builder().exchangeFunction(ef);
+        return new BrainRulesImportClient(restTemplate, builder, objectMapper, BASE_URL, 30);
+    }
+
+    /** Client one-shot : l'ExchangeFunction n'est jamais utilisée. */
+    private BrainRulesImportClient oneShotClient() {
+        return client(req -> Mono.empty());
+    }
+
+    // --- One-shot (RestTemplate) --------------------------------------------
+
+    @Test
+    void importRules_succes_retourneResultatEtCouvreGettersDuDto() {
+        BrainRulesImportResponse wire = new BrainRulesImportResponse();
+        wire.setSections(Map.of("Combat", "## Combat"));
+        wire.setPageCount(12);
+        wire.setOcrPageCount(3);
+        // Couvre aussi les getters Lombok du DTO.
+        assertEquals(Map.of("Combat", "## Combat"), wire.getSections());
+        assertEquals(12, wire.getPageCount());
+        assertEquals(3, wire.getOcrPageCount());
+
+        when(restTemplate.postForObject(anyString(), any(), eq(BrainRulesImportResponse.class)))
+                .thenReturn(wire);
+
+        RulesImportResult result = oneShotClient().importRules(new byte[]{1, 2, 3}, "regles.pdf");
+
+        assertEquals(Map.of("Combat", "## Combat"), result.sections());
+        assertEquals(12, result.pageCount());
+        assertEquals(3, result.ocrPageCount());
+    }
+
+    @Test
+    void importRules_filenameNull_utiliseNomParDefaut() {
+        BrainRulesImportResponse wire = new BrainRulesImportResponse();
+        wire.setSections(Map.of("A", "x"));
+        when(restTemplate.postForObject(anyString(), any(), eq(BrainRulesImportResponse.class)))
+                .thenReturn(wire);
+
+        // filename null -> branche du filePart anonyme (getFilename par défaut).
+        RulesImportResult result = oneShotClient().importRules(new byte[]{9}, null);
+        assertEquals(1, result.sections().size());
+    }
+
+    @Test
+    void importRules_reponseNull_leveRulesImportException() {
+        when(restTemplate.postForObject(anyString(), any(), eq(BrainRulesImportResponse.class)))
+                .thenReturn(null);
+
+        RulesImportException ex = assertThrows(RulesImportException.class,
+                () -> oneShotClient().importRules(new byte[]{1}, "r.pdf"));
+        assertTrue(ex.getMessage().contains("vide"));
+    }
+
+    @Test
+    void importRules_sectionsNull_leveRulesImportException() {
+        BrainRulesImportResponse wire = new BrainRulesImportResponse();
+        wire.setSections(null);
+        when(restTemplate.postForObject(anyString(), any(), eq(BrainRulesImportResponse.class)))
+                .thenReturn(wire);
+
+        assertThrows(RulesImportException.class,
+                () -> oneShotClient().importRules(new byte[]{1}, "r.pdf"));
+    }
+
+    @Test
+    void importRules_resourceAccess_leveRulesImportException() {
+        when(restTemplate.postForObject(anyString(), any(), eq(BrainRulesImportResponse.class)))
+                .thenThrow(new ResourceAccessException("timeout"));
+
+        RulesImportException ex = assertThrows(RulesImportException.class,
+                () -> oneShotClient().importRules(new byte[]{1}, "r.pdf"));
+        assertTrue(ex.getMessage().contains("injoignable"));
+    }
+
+    @Test
+    void importRules_httpServerError_leveRulesImportExceptionAvecStatut() {
+        HttpServerErrorException http = HttpServerErrorException.create(
+                HttpStatus.BAD_GATEWAY, "Bad Gateway", new HttpHeaders(), new byte[0], null);
+        when(restTemplate.postForObject(anyString(), any(), eq(BrainRulesImportResponse.class)))
+                .thenThrow(http);
+
+        RulesImportException ex = assertThrows(RulesImportException.class,
+                () -> oneShotClient().importRules(new byte[]{1}, "r.pdf"));
+        assertTrue(ex.getMessage().contains("502"));
+    }
+
+    @Test
+    void importRules_erreurInattendue_leveRulesImportException() {
+        when(restTemplate.postForObject(anyString(), any(), eq(BrainRulesImportResponse.class)))
+                .thenThrow(new IllegalStateException("boom"));
+
+        RulesImportException ex = assertThrows(RulesImportException.class,
+                () -> oneShotClient().importRules(new byte[]{1}, "r.pdf"));
+        assertTrue(ex.getMessage().contains("inattendue"));
+    }
+
+    // --- Collecteur de callbacks pour le streaming --------------------------
+
+    private static final class Collector {
+        final List<RulesImportProgress> progress = new ArrayList<>();
+        final AtomicInteger heartbeats = new AtomicInteger();
+        final List<String> statuses = new ArrayList<>();
+        final AtomicReference<RulesImportResult> done = new AtomicReference<>();
+        final AtomicReference<Throwable> error = new AtomicReference<>();
+    }
+
+    private void runStreaming(String sse, Collector c) {
+        ExchangeFunction ef = req -> Mono.just(
+                ClientResponse.create(HttpStatus.OK)
+                        .header(HttpHeaders.CONTENT_TYPE, MediaType.TEXT_EVENT_STREAM_VALUE)
+                        .body(sse)
+                        .build());
+        client(ef).importRulesStreaming(
+                new byte[]{1, 2}, "r.pdf",
+                c.progress::add,
+                c.heartbeats::incrementAndGet,
+                c.statuses::add,
+                c.done::set,
+                c.error::set);
+    }
+
+    // --- Streaming (WebClient + SSE) ----------------------------------------
+
+    @Test
+    void streaming_tousLesEvenements_declenchentLesBonsCallbacks() {
+        String sse =
+                "event:extracting\ndata:{}\n\n" +
+                "event:start\ndata:{\"total\":2,\"page_count\":10,\"ocr_page_count\":1}\n\n" +
+                "event:progress\ndata:{\"current\":1,\"total\":2,\"new_sections\":[\"Combat\"]}\n\n" +
+                "event:heartbeat\ndata:{}\n\n" +
+                "event:status\ndata:{\"message\":\"retry\"}\n\n" +
+                "event:chunk_failed\ndata:{\"current\":2,\"total\":2,\"message\":\"timeout\"}\n\n" +
+                "event:done\ndata:{\"sections\":{\"Combat\":\"## Combat\"},\"page_count\":10,\"ocr_page_count\":1}\n\n";
+
+        Collector c = new Collector();
+        runStreaming(sse, c);
+
+        // extracting -> progress(0,0,0,0,[]) ; start -> progress(0,2,10,1,[]) ; progress -> progress(1,2,10,1,[Combat])
+        assertEquals(3, c.progress.size());
+
+        RulesImportProgress extracting = c.progress.get(0);
+        assertEquals(0, extracting.total());
+        assertTrue(extracting.newSectionTitles().isEmpty());
+
+        RulesImportProgress start = c.progress.get(1);
+        assertEquals(0, start.current());
+        assertEquals(2, start.total());
+        assertEquals(10, start.pageCount());
+        assertEquals(1, start.ocrPageCount());
+
+        RulesImportProgress prog = c.progress.get(2);
+        assertEquals(1, prog.current());
+        assertEquals(2, prog.total());
+        assertEquals(10, prog.pageCount());
+        assertEquals(1, prog.ocrPageCount());
+        assertEquals(List.of("Combat"), prog.newSectionTitles());
+
+        assertEquals(1, c.heartbeats.get());
+
+        // status (readMessage -> "retry") + chunk_failed (statut formaté).
+        assertEquals(2, c.statuses.size());
+        assertEquals("retry", c.statuses.get(0));
+        assertTrue(c.statuses.get(1).contains("Morceau 2/2"));
+        assertTrue(c.statuses.get(1).contains("timeout"));
+
+        assertNotNull(c.done.get());
+        assertEquals(Map.of("Combat", "## Combat"), c.done.get().sections());
+        assertEquals(10, c.done.get().pageCount());
+        assertEquals(1, c.done.get().ocrPageCount());
+
+        // done a positionné terminated -> pas d'onError.
+        assertEquals(null, c.error.get());
+    }
+
+    @Test
+    void streaming_evenementError_appelleOnError() {
+        String sse = "event:error\ndata:{\"message\":\"LLM saturé\"}\n\n";
+        Collector c = new Collector();
+        runStreaming(sse, c);
+
+        assertNotNull(c.error.get());
+        assertTrue(c.error.get() instanceof RulesImportException);
+        assertTrue(c.error.get().getMessage().contains("LLM saturé"));
+        assertNull(c.done.get());
+    }
+
+    @Test
+    void streaming_chunkFailedSansMessage_statutAvecPoint() {
+        // node sans champ "message" -> branche "." finale.
+        String sse = "event:chunk_failed\ndata:{\"current\":1,\"total\":3}\n\n";
+        Collector c = new Collector();
+        runStreaming(sse, c);
+
+        assertEquals(1, c.statuses.size());
+        assertTrue(c.statuses.get(0).contains("Morceau 1/3 ignoré."));
+    }
+
+    @Test
+    void streaming_statusDataNonJson_readMessageRenvoieDataBrut() {
+        // data non-JSON -> readJson renvoie null -> readMessage retourne le data brut.
+        String sse = "event:status\ndata:texte brut\n\n";
+        Collector c = new Collector();
+        runStreaming(sse, c);
+
+        assertEquals(1, c.statuses.size());
+        assertEquals("texte brut", c.statuses.get(0));
+    }
+
+    @Test
+    void streaming_evenementInconnuAvecDataNonJson_estIgnore() {
+        // Pas heartbeat/status/chunk_failed/error/extracting, et readJson==null -> return.
+        String sse = "event:mystere\ndata:pas du json\n\n";
+        Collector c = new Collector();
+        runStreaming(sse, c);
+
+        assertTrue(c.progress.isEmpty());
+        assertTrue(c.statuses.isEmpty());
+        // Aucun done/error -> flux interrompu -> onError.
+        assertNotNull(c.error.get());
+        assertTrue(c.error.get().getMessage().contains("interrompu"));
+    }
+
+    @Test
+    void streaming_finSansDoneNiError_signaleFluxInterrompu() {
+        // Que des heartbeats : pas de done/error -> branche "flux interrompu".
+        String sse = "event:heartbeat\ndata:{}\n\n";
+        Collector c = new Collector();
+        runStreaming(sse, c);
+
+        assertEquals(1, c.heartbeats.get());
+        assertNotNull(c.error.get());
+        assertTrue(c.error.get() instanceof RulesImportException);
+        assertTrue(c.error.get().getMessage().contains("interrompu"));
+    }
+
+    @Test
+    void streaming_erreurTransport_appelleOnErrorAvecCauseExposee() {
+        ExchangeFunction ef = req -> Mono.error(new RuntimeException("boom"));
+        Collector c = new Collector();
+        client(ef).importRulesStreaming(
+                new byte[]{1}, "r.pdf",
+                c.progress::add, c.heartbeats::incrementAndGet, c.statuses::add,
+                c.done::set, c.error::set);
+
+        assertNotNull(c.error.get());
+        assertTrue(c.error.get() instanceof RulesImportException);
+        // La cause réelle (type + message) est exposée dans le message.
+        assertTrue(c.error.get().getMessage().contains("boom"));
+        assertNotNull(c.error.get().getCause());
+    }
+
+    @Test
+    void streaming_filenameVide_utiliseNomParDefautSansErreur() {
+        // filename vide -> branches "rules.pdf" du filePart et du part().filename().
+        String sse = "event:done\ndata:{\"sections\":{},\"page_count\":0,\"ocr_page_count\":0}\n\n";
+        Collector c = new Collector();
+        ExchangeFunction ef = req -> Mono.just(
+                ClientResponse.create(HttpStatus.OK)
+                        .header(HttpHeaders.CONTENT_TYPE, MediaType.TEXT_EVENT_STREAM_VALUE)
+                        .body(sse)
+                        .build());
+        client(ef).importRulesStreaming(
+                new byte[]{1}, "  ",
+                c.progress::add, c.heartbeats::incrementAndGet, c.statuses::add,
+                c.done::set, c.error::set);
+
+        assertNotNull(c.done.get());
+        assertTrue(c.done.get().sections().isEmpty());
+        assertNull(c.error.get());
+    }
+
+    // petits helpers d'assertion null/non-null (évite import statique supplémentaire)
+    private static void assertNull(Object o) {
+        assertTrue(o == null, "attendu null");
+    }
+}