@@ -1,8 +1,8 @@
 {
   "$schema": "../gen/schemas/desktop-schema.json",
   "identifier": "default",
-  "description": "Capability for the main window",
-  "windows": ["main"],
+  "description": "Capability for the main window and trusted huddle companions",
+  "windows": ["main", "huddle-*"],
   "permissions": [
     "core:default",
     "core:webview:allow-set-webview-zoom",
 
@@ -0,0 +1,310 @@
+//! Per-agent text-to-speech choices for one local huddle session.
+
+use std::collections::{BTreeMap, HashSet};
+
+use serde::{Deserialize, Serialize};
+use tauri::{AppHandle, State};
+
+use crate::app_state::AppState;
+
+use super::{
+    tts_settings::{
+        pocket_voice_reference, resolve_voice_for_backend_in_registry, voice_registry,
+        VoiceRegistryEntry, POCKET_BACKEND_ID,
+    },
+    HuddlePhase, HuddleState,
+};
+
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
+pub struct AgentVoiceSettings {
+    pub enabled: bool,
+    pub voice_key: String,
+}
+
+struct AgentVoiceCatalog {
+    default_voice_key: String,
+    voices: Vec<VoiceRegistryEntry>,
+}
+
+fn catalog(app: &AppHandle, state: &AppState) -> Result<AgentVoiceCatalog, String> {
+    let registry = voice_registry(app);
+    let settings = state
+        .huddle_audio
+        .tts
+        .lock()
+        .map_err(|error| format!("text-to-speech settings lock poisoned: {error}"))?
+        .clone();
+    let voices: Vec<_> = registry
+        .iter()
+        .filter(|voice| {
+            voice.backend == POCKET_BACKEND_ID
+                && matches!(voice.availability.as_str(), "bundled" | "installed")
+        })
+        .cloned()
+        .collect();
+    let default_voice_key = resolve_voice_for_backend_in_registry(
+        &settings.voice_preferences,
+        POCKET_BACKEND_ID,
+        &voices,
+    )?
+    .key;
+    Ok(AgentVoiceCatalog {
+        default_voice_key,
+        voices,
+    })
+}
+
+fn stable_voice_index(agent_pubkey: &str, huddle_generation: u64, len: usize) -> usize {
+    let hash = agent_pubkey.bytes().fold(
+        0xcbf2_9ce4_8422_2325_u64 ^ huddle_generation,
+        |hash, byte| hash.wrapping_mul(0x0000_0100_0000_01b3) ^ u64::from(byte),
+    );
+    (hash as usize) % len
+}
+
+pub(crate) fn sync_agent_voice_assignments(
+    huddle: &mut HuddleState,
+    agent_pubkeys: &[String],
+    default_voice_key: &str,
+    voices: &[VoiceRegistryEntry],
+) -> bool {
+    let previous = huddle.agent_voice_settings.clone();
+    let available_keys: Vec<_> = voices.iter().map(|voice| voice.key.clone()).collect();
+    let available: HashSet<_> = available_keys.iter().cloned().collect();
+    let agents: HashSet<_> = agent_pubkeys.iter().cloned().collect();
+    huddle.agent_voice_settings.retain(|pubkey, settings| {
+        agents.contains(pubkey) && available.contains(&settings.voice_key)
+    });
+
+    let mut used: HashSet<_> = huddle
+        .agent_voice_settings
+        .values()
+        .map(|settings| settings.voice_key.clone())
+        .collect();
+    for (index, pubkey) in agent_pubkeys.iter().enumerate() {
+        if huddle.agent_voice_settings.contains_key(pubkey) {
+            continue;
+        }
+        let preferred = if index == 0 && !used.contains(default_voice_key) {
+            Some(default_voice_key.to_owned())
+        } else {
+            let unused_alternates: Vec<_> = available_keys
+                .iter()
+                .filter(|key| key.as_str() != default_voice_key && !used.contains(*key))
+                .cloned()
+                .collect();
+            let unused: Vec<_> = available_keys
+                .iter()
+                .filter(|key| !used.contains(*key))
+                .cloned()
+                .collect();
+            let candidates = if unused_alternates.is_empty() {
+                if unused.is_empty() {
+                    &available_keys
+                } else {
+                    &unused
+                }
+            } else {
+                &unused_alternates
+            };
+            (!candidates.is_empty()).then(|| {
+                candidates[stable_voice_index(pubkey, huddle.huddle_generation, candidates.len())]
+                    .clone()
+            })
+        };
+        if let Some(voice_key) = preferred {
+            used.insert(voice_key.clone());
+            huddle.agent_voice_settings.insert(
+                pubkey.clone(),
+                AgentVoiceSettings {
+                    enabled: true,
+                    voice_key,
+                },
+            );
+        }
+    }
+    huddle.agent_voice_settings != previous
+}
+
+fn ensure_with_catalog(
+    huddle: &mut HuddleState,
+    catalog: &AgentVoiceCatalog,
+    extra_agent: Option<&str>,
+) -> bool {
+    let mut agents = huddle
+        .agent_pubkeys
+        .lock()
+        .unwrap_or_else(|error| error.into_inner())
+        .clone();
+    if let Some(pubkey) = extra_agent {
+        if !agents.iter().any(|agent| agent == pubkey) {
+            agents.push(pubkey.to_owned());
+        }
+    }
+    sync_agent_voice_assignments(huddle, &agents, &catalog.default_voice_key, &catalog.voices)
+}
+
+fn require_active_huddle(huddle: &HuddleState) -> Result<(), String> {
+    matches!(huddle.phase, HuddlePhase::Connected | HuddlePhase::Active)
+        .then_some(())
+        .ok_or_else(|| "No active huddle".to_owned())
+}
+
+#[tauri::command]
+pub fn ensure_huddle_agent_voice_settings(
+    app: AppHandle,
+    state: State<'_, AppState>,
+) -> Result<BTreeMap<String, AgentVoiceSettings>, String> {
+    let catalog = catalog(&app, &state)?;
+    let (changed, settings) = {
+        let mut huddle = state.huddle()?;
+        if !matches!(huddle.phase, HuddlePhase::Connected | HuddlePhase::Active) {
+            return Ok(BTreeMap::new());
+        }
+        let changed = ensure_with_catalog(&mut huddle, &catalog, None);
+        (changed, huddle.agent_voice_settings.clone())
+    };
+    if changed {
+        state.emit_huddle_state_changed();
+    }
+    Ok(settings)
+}
+
+#[tauri::command]
+pub fn set_huddle_agent_tts_enabled(
+    agent_pubkey: String,
+    enabled: bool,
+    app: AppHandle,
+    state: State<'_, AppState>,
+) -> Result<AgentVoiceSettings, String> {
+    let catalog = catalog(&app, &state)?;
+    let settings = {
+        let mut huddle = state.huddle()?;
+        require_active_huddle(&huddle)?;
+        ensure_with_catalog(&mut huddle, &catalog, Some(&agent_pubkey));
+        let settings = huddle
+            .agent_voice_settings
+            .get_mut(&agent_pubkey)
+            .ok_or("Agent is not in the active huddle")?;
+        settings.enabled = enabled;
+        settings.clone()
+    };
+    state.emit_huddle_state_changed();
+    Ok(settings)
+}
+
+#[tauri::command]
+pub fn set_huddle_agent_voice(
+    agent_pubkey: String,
+    voice_key: String,
+    app: AppHandle,
+    state: State<'_, AppState>,
+) -> Result<AgentVoiceSettings, String> {
+    let catalog = catalog(&app, &state)?;
+    if !catalog.voices.iter().any(|voice| voice.key == voice_key) {
+        return Err("The selected Pocket voice is not available on this device".to_owned());
+    }
+    let settings = {
+        let mut huddle = state.huddle()?;
+        require_active_huddle(&huddle)?;
+        ensure_with_catalog(&mut huddle, &catalog, Some(&agent_pubkey));
+        let settings = huddle
+            .agent_voice_settings
+            .get_mut(&agent_pubkey)
+            .ok_or("Agent is not in the active huddle")?;
+        settings.voice_key = voice_key;
+        settings.clone()
+    };
+    state.emit_huddle_state_changed();
+    Ok(settings)
+}
+
+pub(crate) fn voice_reference_for_agent(
+    app: &AppHandle,
+    state: &AppState,
+    agent_pubkey: &str,
+) -> Result<Option<String>, String> {
+    let catalog = catalog(app, state)?;
+    let (changed, settings) = {
+        let mut huddle = state.huddle()?;
+        require_active_huddle(&huddle)?;
+        let changed = ensure_with_catalog(&mut huddle, &catalog, Some(agent_pubkey));
+        let settings = huddle.agent_voice_settings.get(agent_pubkey).cloned();
+        (changed, settings)
+    };
+    if changed {
+        state.emit_huddle_state_changed();
+    }
+    let Some(settings) = settings else {
+        return Err("Agent is not in the active huddle".to_owned());
+    };
+    if !settings.enabled {
+        return Ok(None);
+    }
+    pocket_voice_reference(app, &[settings.voice_key]).map(Some)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::huddle::tts_settings::bundled_voice_registry;
+
+    #[test]
+    fn first_agent_uses_default_and_additional_agents_are_distinct() {
+        let agents = vec!["first".to_owned(), "second".to_owned(), "third".to_owned()];
+        let mut huddle = HuddleState {
+            huddle_generation: 9,
+            ..HuddleState::default()
+        };
+
+        assert!(sync_agent_voice_assignments(
+            &mut huddle,
+            &agents,
+            "pocket:vera",
+            &bundled_voice_registry(),
+        ));
+
+        assert_eq!(
+            huddle.agent_voice_settings["first"].voice_key,
+            "pocket:vera"
+        );
+        let distinct: HashSet<_> = huddle
+            .agent_voice_settings
+            .values()
+            .map(|settings| settings.voice_key.as_str())
+            .collect();
+        assert_eq!(distinct.len(), 3);
+    }
+
+    #[test]
+    fn explicit_session_choices_survive_roster_resync() {
+        let agents = vec!["first".to_owned(), "second".to_owned()];
+        let voices = bundled_voice_registry();
+        let mut huddle = HuddleState::default();
+        sync_agent_voice_assignments(&mut huddle, &agents, "pocket:mary", &voices);
+        huddle
+            .agent_voice_settings
+            .get_mut("second")
+            .unwrap()
+            .enabled = false;
+        huddle
+            .agent_voice_settings
+            .get_mut("second")
+            .unwrap()
+            .voice_key = "pocket:jane".into();
+
+        assert!(!sync_agent_voice_assignments(
+            &mut huddle,
+            &agents,
+            "pocket:mary",
+            &voices,
+        ));
+        assert_eq!(
+            huddle.agent_voice_settings["second"],
+            AgentVoiceSettings {
+                enabled: false,
+                voice_key: "pocket:jane".into(),
+            }
+        );
+    }
+}