fix(agent): rendre explicite le routage structuré vs PTY dans LaunchAgent (#33)

Un profil structuré rencontrant une factory de session non câblée retombait
silencieusement sur pty.spawn (fallthrough du `if let`), masquant une erreur de
configuration au lieu de la signaler.

Remplace ce fallthrough par une intention explicite :
- nouvel enum StructuredRoutingMode { HumanPtyFallback, RequireStructured } sur
  LaunchAgent, posé via le builder with_structured_routing_mode ;
- le `if let` devient un `match` explicite (agent/lifecycle.rs) ; en mode
  RequireStructured, un profil structuré sans factory câblée retourne
  AppError::Process("structured profile requires structured session factory")
  au lieu de tomber sur pty.spawn.

Composition root (app-tauri/src/state.rs) : launcher humain = HumanPtyFallback,
launcher orchestrateur = RequireStructured, wake background rebranché sur
orchestrator_launch_agent.

Tests : agent_lifecycle.rs (4 branches de routage) + non-régression
agent_wake/structured_launch_d3. Crate application verte.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

crates/app-tauri/src/state.rs

@@ -36,10 +36,10 @@ use application::{
     ResolveMemoryLinks, RestoreOpenWindows, RetryBackgroundTask, RotateConversationLog,
     SaveEmbedderProfile, SaveModelServer, SaveProfile, SessionLimitService, SetActiveLayout,
     SnapshotOpenWindows, SnapshotRunningAgents, SpawnBackgroundCommand, StopLiveAgent,
-    StructuredSessions, SuggestedThisSession, SyncAgentWithTemplate, TerminalSessions,
-    UnassignSkillFromAgent, UnassignTicketFromSprint, UnlinkIssues, UpdateAgentContext,
-    UpdateAgentPermissions, UpdateIssue, UpdateIssueCarnet, UpdateLiveState, UpdateMemory,
-    UpdateProjectContext, UpdateProjectPermissions, UpdateSkill, UpdateTemplate,
+    StructuredRoutingMode, StructuredSessions, SuggestedThisSession, SyncAgentWithTemplate,
+    TerminalSessions, UnassignSkillFromAgent, UnassignTicketFromSprint, UnlinkIssues,
+    UpdateAgentContext, UpdateAgentPermissions, UpdateIssue, UpdateIssueCarnet, UpdateLiveState,
+    UpdateMemory, UpdateProjectContext, UpdateProjectPermissions, UpdateSkill, UpdateTemplate,
     WakeSessionProvider, WriteMemory, WriteToTerminal, AGENT_MEMORY_RECALL_BUDGET,
 };
 use async_trait::async_trait;
@@ -1568,6 +1568,7 @@ impl AppState {
                 Arc::clone(&memory_recall_port),
                 Some(Arc::clone(&check_embedder_suggestion)),
             )
+            .with_structured_routing_mode(StructuredRoutingMode::HumanPtyFallback)
             .with_permission_store(Arc::clone(&permission_store_port))
             // Reprise conversationnelle (lot P7) : à chaque (re)lancement, si la cellule
             // porte une conversation et qu'un handoff existe (`<root>/.ideai/conversations/`),
@@ -1613,6 +1614,7 @@ impl AppState {
                 Arc::clone(&memory_recall_port),
                 Some(Arc::clone(&check_embedder_suggestion)),
             )
+            .with_structured_routing_mode(StructuredRoutingMode::RequireStructured)
             .with_permission_store(Arc::clone(&permission_store_port))
             .with_handoff_provider(
                 Arc::new(AppHandoffProvider) as Arc<dyn application::HandoffProvider>
@@ -1910,7 +1912,7 @@ impl AppState {
             Arc::clone(&mailbox),
             Arc::clone(&background_tasks_port),
             Arc::new(AppWakeSessionProvider {
-                launch_agent: Arc::clone(&launch_agent),
+                launch_agent: Arc::clone(&orchestrator_launch_agent),
                 structured_sessions: Arc::clone(&structured_sessions),
             }),
             Some(Arc::clone(&events_port)),

crates/application/src/agent/lifecycle.rs

@@ -998,6 +998,15 @@ pub struct LaunchAgentOutput {
     pub profile: Option<AgentProfile>,
 }
 
+/// Explicit routing intent for profiles that declare a structured adapter.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum StructuredRoutingMode {
+    /// Human-facing cells intentionally keep the native CLI/TUI in a PTY.
+    HumanPtyFallback,
+    /// Headless/orchestrated launchers must route structured profiles via AgentSession.
+    RequireStructured,
+}
+
 /// Registry mapping each [`ProjectorKey`] to its concrete
 /// [`PermissionProjector`] (lot LP3-3). Injected into [`LaunchAgent`] via the
 /// optional builder [`LaunchAgent::with_permission_projectors`]; the concrete
@@ -1141,6 +1150,8 @@ pub struct LaunchAgent {
     /// `opencode.json` (B35). Optional for legacy tests/wiring; required at runtime
     /// when `OpenCodeConfig.localModelServerId` is set.
     local_model_server: Option<Arc<EnsureLocalModelServer>>,
+    /// Explicit intent for structured profiles when structured ports are absent.
+    structured_routing_mode: StructuredRoutingMode,
 }
 
 impl LaunchAgent {
@@ -1180,9 +1191,17 @@ impl LaunchAgent {
             projectors: None,
             live_state_lean: None,
             local_model_server: None,
+            structured_routing_mode: StructuredRoutingMode::HumanPtyFallback,
         }
     }
 
+    /// Sets the explicit routing intent for profiles carrying a structured adapter.
+    #[must_use]
+    pub const fn with_structured_routing_mode(mut self, mode: StructuredRoutingMode) -> Self {
+        self.structured_routing_mode = mode;
+        self
+    }
+
     /// Injects the local model-server ensure use case used by OpenCode profiles.
     #[must_use]
     pub fn with_local_model_server(mut self, ensure: Arc<EnsureLocalModelServer>) -> Self {
@@ -1712,17 +1731,17 @@ impl LaunchAgent {
         );
 
         // 5b. ── POINT DE ROUTAGE §17.4 : IA structuré vs terminal brut ──
-        //     Le convention file (CLAUDE.md / AGENTS.md) vient d'être écrit dans le
-        //     run dir (étape 5) ; la CLI structurée le lira à chaque tour
-        //     (incarnation « un run par tour »). Si le profil porte un
-        //     `structured_adapter` ET que la fabrique structurée est câblée, on
-        //     démarre une `AgentSession` via le port — **pas** de `pty.spawn` — et on
-        //     l'enregistre dans `StructuredSessions`. Sinon : chemin PTY inchangé.
-        if let (Some(factory), Some(structured), true) = (
+        //     L'intention est explicite sur le launcher : les cellules humaines peuvent
+        //     garder une CLI/TUI native en PTY, les launchers headless/orchestrés doivent
+        //     échouer fort si le routage structuré est mal câblé.
+        match (
+            profile.structured_adapter.is_some(),
             self.session_factory.as_ref(),
             self.structured.as_ref(),
-            profile.structured_adapter.is_some(),
+            self.structured_routing_mode,
         ) {
+            (false, _, _, _) => {}
+            (true, Some(factory), Some(structured), _) => {
                 // ── Clé **logique** de la cellule = id de paire IdeA (ARCHITECTURE §19.7,
                 //    lot P8a) ──
                 //  - cellule porteuse d'un `conversation_id` (resume, ou lancement délégué
@@ -1758,6 +1777,15 @@ impl LaunchAgent {
                     )
                     .await;
             }
+            (true, _, _, StructuredRoutingMode::HumanPtyFallback) => {
+                // Fallback humain intentionnel : cellule interactive native en PTY.
+            }
+            (true, _, _, StructuredRoutingMode::RequireStructured) => {
+                return Err(AppError::Process(
+                    "structured profile requires structured session factory".to_owned(),
+                ));
+            }
+        }
 
         // 6. Spawn the PTY at the resolved cwd; adopt its session id everywhere.
         let handle = self.pty.spawn(spec.clone(), size).await?;

crates/application/src/agent/mod.rs

@@ -34,8 +34,8 @@ pub use lifecycle::{
     InjectedLiveRow, LaunchAgent, LaunchAgentInput, LaunchAgentOutput, ListAgents, ListAgentsInput,
     ListAgentsOutput, LiveStateLeanProvider, McpRuntime, PermissionProjectorRegistry,
     ProviderSessionProvider, ReadAgentContext, ReadAgentContextInput, ReadAgentContextOutput,
-    StructuredSessionDescriptor, UpdateAgentContext, UpdateAgentContextInput,
-    AGENT_MEMORY_RECALL_BUDGET, LIVE_STATE_INJECT_MAX,
+    StructuredRoutingMode, StructuredSessionDescriptor, UpdateAgentContext,
+    UpdateAgentContextInput, AGENT_MEMORY_RECALL_BUDGET, LIVE_STATE_INJECT_MAX,
 };
 pub use resume::{
     ListResumableAgents, ListResumableAgentsInput, ListResumableAgentsOutput, ResumableAgent,

crates/application/src/lib.rs

@@ -52,8 +52,9 @@ pub use agent::{
     PermissionProjectorRegistry, ProfileAvailability, ProviderSessionProvider, ReadAgentContext,
     ReadAgentContextInput, ReadAgentContextOutput, ReferenceProfiles, ReferenceProfilesOutput,
     ResumableAgent, SaveProfile, SaveProfileInput, SaveProfileOutput, SessionLimitService,
-    StructuredSessionDescriptor, TurnOutcome, UpdateAgentContext, UpdateAgentContextInput,
-    AGENT_MEMORY_RECALL_BUDGET, CODEX_SUBMIT_DELAY_MS, LIVE_STATE_INJECT_MAX, RESUME_PROMPT,
+    StructuredRoutingMode, StructuredSessionDescriptor, TurnOutcome, UpdateAgentContext,
+    UpdateAgentContextInput, AGENT_MEMORY_RECALL_BUDGET, CODEX_SUBMIT_DELAY_MS,
+    LIVE_STATE_INJECT_MAX, RESUME_PROMPT,
 };
 pub use background::{
     BackgroundCommandArchive, CancelBackgroundTask, CancelBackgroundTaskOutput,

crates/application/tests/agent_lifecycle.rs

@@ -28,10 +28,11 @@ use domain::permission::{
     ProjectionContext, ProjectorKey,
 };
 use domain::ports::{
-    AgentContextStore, AgentRuntime, ContextInjectionPlan, DirEntry, EventBus, EventStream,
-    ExitStatus, FileSystem, FsError, IdGenerator, MemoryError, MemoryQuery, MemoryRecall,
-    OutputStream, PermissionStore, PreparedContext, ProfileStore, PtyError, PtyHandle, PtyPort,
-    RemotePath, RuntimeError, SessionPlan, SkillStore, SpawnSpec, StoreError,
+    AgentContextStore, AgentRuntime, AgentSession, AgentSessionError, AgentSessionFactory,
+    ContextInjectionPlan, DirEntry, EventBus, EventStream, ExitStatus, FileSystem, FsError,
+    IdGenerator, MemoryError, MemoryQuery, MemoryRecall, OutputStream, PermissionStore,
+    PreparedContext, ProfileStore, PtyError, PtyHandle, PtyPort, RemotePath, ReplyStream,
+    RuntimeError, SessionPlan, SkillStore, SpawnSpec, StoreError,
 };
 use domain::profile::{
     AgentProfile, ContextInjection, McpCapability, McpConfigStrategy, McpTransport, OpenCodeConfig,
@@ -48,7 +49,8 @@ use uuid::Uuid;
 use application::{
     CreateAgentFromScratch, CreateAgentInput, DeleteAgent, DeleteAgentInput, LaunchAgent,
     LaunchAgentInput, ListAgents, ListAgentsInput, PermissionProjectorRegistry, ReadAgentContext,
-    ReadAgentContextInput, TerminalSessions, UpdateAgentContext, UpdateAgentContextInput,
+    ReadAgentContextInput, StructuredRoutingMode, StructuredSessions, TerminalSessions,
+    UpdateAgentContext, UpdateAgentContextInput,
 };
 
 // ---------------------------------------------------------------------------
@@ -557,6 +559,83 @@ impl PtyPort for FakePty {
     }
 }
 
+// ---------------------------------------------------------------------------
+// FakeStructuredFactory (AgentSessionFactory) — records structured starts
+// ---------------------------------------------------------------------------
+
+#[derive(Clone)]
+struct FakeSession {
+    id: SessionId,
+    conversation_id: Option<String>,
+}
+
+#[async_trait]
+impl AgentSession for FakeSession {
+    fn id(&self) -> SessionId {
+        self.id
+    }
+
+    fn conversation_id(&self) -> Option<String> {
+        self.conversation_id.clone()
+    }
+
+    async fn send(&self, _prompt: &str) -> Result<ReplyStream, AgentSessionError> {
+        Ok(Box::new(std::iter::empty()))
+    }
+
+    async fn shutdown(&self) -> Result<(), AgentSessionError> {
+        Ok(())
+    }
+}
+
+#[derive(Clone)]
+struct FakeStructuredFactory {
+    trace: Trace,
+    starts: Arc<Mutex<Vec<ProfileId>>>,
+    next_session: SessionId,
+}
+
+impl FakeStructuredFactory {
+    fn new(trace: Trace, next_session: SessionId) -> Self {
+        Self {
+            trace,
+            starts: Arc::new(Mutex::new(Vec::new())),
+            next_session,
+        }
+    }
+
+    fn starts(&self) -> Vec<ProfileId> {
+        self.starts.lock().unwrap().clone()
+    }
+}
+
+#[async_trait]
+impl AgentSessionFactory for FakeStructuredFactory {
+    fn supports(&self, profile: &AgentProfile) -> bool {
+        profile.structured_adapter.is_some()
+    }
+
+    async fn start(
+        &self,
+        profile: &AgentProfile,
+        _ctx: &PreparedContext,
+        _cwd: &ProjectPath,
+        _session: &SessionPlan,
+        _env: &[(String, String)],
+        _sandbox: Option<&domain::sandbox::SandboxPlan>,
+    ) -> Result<Arc<dyn AgentSession>, AgentSessionError> {
+        self.trace
+            .lock()
+            .unwrap()
+            .push("structured.start".to_owned());
+        self.starts.lock().unwrap().push(profile.id);
+        Ok(Arc::new(FakeSession {
+            id: self.next_session,
+            conversation_id: Some("engine-session-1".to_owned()),
+        }))
+    }
+}
+
 // ---------------------------------------------------------------------------
 // SpyBus + SeqIds
 // ---------------------------------------------------------------------------
@@ -941,6 +1020,108 @@ async fn launch_orders_prepare_then_injection_then_spawn() {
     );
 }
 
+#[tokio::test]
+async fn structured_profile_with_factory_routes_to_structured_session_without_pty_spawn() {
+    let profile = profile(
+        pid(9),
+        ContextInjection::convention_file("CLAUDE.md").unwrap(),
+    )
+    .with_structured_adapter(StructuredAdapter::Claude);
+    let (launch, agent, _fs, pty, _bus, _sessions, tr, _session) = launch_fixture_with_profile(
+        profile,
+        Some(ContextInjectionPlan::File {
+            target: "CLAUDE.md".to_owned(),
+        }),
+    );
+    let factory = FakeStructuredFactory::new(Arc::clone(&tr), sid(888));
+    let factory_port: Arc<dyn AgentSessionFactory> = Arc::new(factory.clone());
+    let structured = Arc::new(StructuredSessions::new());
+    let launch = launch
+        .with_structured_routing_mode(StructuredRoutingMode::RequireStructured)
+        .with_structured(factory_port, Arc::clone(&structured));
+
+    let out = launch.execute(launch_input(agent.id)).await.unwrap();
+
+    assert_eq!(factory.starts(), vec![pid(9)]);
+    assert!(
+        pty.spawns().is_empty(),
+        "structured route must not spawn PTY"
+    );
+    assert!(out.structured.is_some());
+    assert!(structured.session(&sid(888)).is_some());
+    assert_eq!(
+        *tr.lock().unwrap(),
+        vec![
+            "prepare".to_owned(),
+            "fs.write".to_owned(),
+            "structured.start".to_owned()
+        ]
+    );
+}
+
+#[tokio::test]
+async fn structured_profile_without_factory_require_structured_errors_without_pty_spawn() {
+    let profile = profile(
+        pid(9),
+        ContextInjection::convention_file("CLAUDE.md").unwrap(),
+    )
+    .with_structured_adapter(StructuredAdapter::Claude);
+    let (launch, agent, _fs, pty, _bus, _sessions, _tr, _session) = launch_fixture_with_profile(
+        profile,
+        Some(ContextInjectionPlan::File {
+            target: "CLAUDE.md".to_owned(),
+        }),
+    );
+    let launch = launch.with_structured_routing_mode(StructuredRoutingMode::RequireStructured);
+
+    let err = launch.execute(launch_input(agent.id)).await.unwrap_err();
+
+    assert!(err
+        .to_string()
+        .contains("structured profile requires structured session factory"));
+    assert!(
+        pty.spawns().is_empty(),
+        "miswired structured route must not spawn PTY"
+    );
+}
+
+#[tokio::test]
+async fn structured_profile_without_factory_human_fallback_spawns_pty() {
+    let profile = profile(
+        pid(9),
+        ContextInjection::convention_file("CLAUDE.md").unwrap(),
+    )
+    .with_structured_adapter(StructuredAdapter::Claude);
+    let (launch, agent, _fs, pty, _bus, _sessions, _tr, _session) = launch_fixture_with_profile(
+        profile,
+        Some(ContextInjectionPlan::File {
+            target: "CLAUDE.md".to_owned(),
+        }),
+    );
+    let launch = launch.with_structured_routing_mode(StructuredRoutingMode::HumanPtyFallback);
+
+    let out = launch.execute(launch_input(agent.id)).await.unwrap();
+
+    assert!(out.structured.is_none());
+    assert_eq!(pty.spawns().len(), 1, "human fallback keeps native CLI PTY");
+}
+
+#[tokio::test]
+async fn non_structured_profile_uses_pty_even_when_structured_is_required() {
+    let (launch, agent, _fs, pty, _bus, _sessions, _tr, _session) = launch_fixture(
+        ContextInjection::convention_file("CLAUDE.md").unwrap(),
+        Some(ContextInjectionPlan::File {
+            target: "CLAUDE.md".to_owned(),
+        }),
+    );
+    let launch = launch.with_structured_routing_mode(StructuredRoutingMode::RequireStructured);
+
+    let out = launch.execute(launch_input(agent.id)).await.unwrap();
+
+    assert!(out.structured.is_none());
+    assert_eq!(pty.spawns().len(), 1);
+}
+
 #[tokio::test]
 async fn launch_injects_shared_project_context_from_ideai_context_md() {
     let (launch, agent, fs, _pty, _bus, _sessions, _tr, _session) = launch_fixture(