feat: apply provider quirks to models created from a name

Unknown chat/reranker models resolved through the create-from-name
fallback now inherit their provider's family rules (require_max_tokens,
reasoning defaults, etc.) from the quirks overlay, and the model
completion table marks reasoning-capable models with a brain glyph.

src/client/model.rs

@@ -1,5 +1,7 @@
 use super::{
-    ApiPatch, MessageContentToolCalls, RequestPatch, list_all_models, list_client_names,
+    ApiPatch, MessageContentToolCalls, RequestPatch,
+    catalog::{ALL_QUIRKS, apply_rules, quirks_for},
+    list_all_models, list_client_names,
     message::{Message, MessageContent, MessageContentPart},
 };
 
@@ -77,6 +79,9 @@ impl Model {
                 {
                     let mut new_model = Self::new(client_name, model_name);
                     new_model.data.model_type = model_type.to_string();
+                    if let Some(quirks) = quirks_for(&ALL_QUIRKS, client_name) {
+                        apply_rules(quirks, &mut new_model.data);
+                    }
                     return Ok(new_model);
                 }
             }
@@ -132,6 +137,7 @@ impl Model {
                     output_price,
                     supports_vision,
                     supports_function_calling,
+                    reasoning_levels,
                     ..
                 } = &self.data;
                 let max_input_tokens = stringify_option_value(max_input_tokens);
@@ -145,6 +151,9 @@ impl Model {
                 if *supports_function_calling {
                     capabilities.push('⚒');
                 };
+                if !reasoning_levels.is_empty() {
+                    capabilities.push('🧠');
+                };
                 let capabilities: String = capabilities
                     .into_iter()
                     .map(|v| format!("{v} "))
@@ -419,3 +428,43 @@ where
         None => "-".to_string(),
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::client::ClientConfig;
+
+    #[test]
+    fn created_from_name_inherits_family_rules() {
+        // The model registries are process-wide caches seeded by a ctor (see
+        // the request_context tests) that registers a "claude" client; the
+        // config below documents the shape a real lookup would use.
+        let claude: ClientConfig = serde_yaml::from_str(
+            "type: claude\nmodels:\n  - name: test-claude-embedder\n    type: embedding\n",
+        )
+        .unwrap();
+        let config = AppConfig {
+            clients: vec![claude],
+            ..AppConfig::default()
+        };
+        let model = Model::retrieve_model(
+            &config,
+            "claude:claude-definitely-not-a-real-model",
+            ModelType::Chat,
+        )
+        .unwrap();
+        assert_eq!(model.name(), "claude-definitely-not-a-real-model");
+        assert_eq!(model.model_type(), ModelType::Chat);
+        assert!(model.data.require_max_tokens);
+    }
+
+    #[test]
+    fn description_shows_brain_glyph() {
+        let mut model = Model::new("claude", "some-model");
+        model.data.reasoning_levels = vec!["low".to_string(), "high".to_string()];
+        assert!(model.description().contains('🧠'));
+
+        model.data.reasoning_levels.clear();
+        assert!(!model.description().contains('🧠'));
+    }
+}

src/config/request_context.rs

@@ -5232,7 +5232,7 @@ mod tests {
     // with an empty client list, which would permanently pin every later
     // model lookup in this process to "unknown model" and make any test that
     // needs a resolvable model dependent on test ordering. Seed the caches
-    // before any test runs with one client, "test-seeded", exposing a single
+    // before any test runs with a client, "test-seeded", exposing a single
     // embedding model. Deliberately NO chat model: some tests assert that no
     // chat model is available, and chat lookups don't need one — a
     // "test-seeded:<anything>" chat id resolves through the create-from-name
@@ -5252,8 +5252,17 @@ mod tests {
             embedder.model_type = "embedding".to_string();
             config.models = vec![embedder];
         }
+        // A claude client is seeded alongside it so tests can exercise
+        // provider-quirk inheritance through the create-from-name fallback.
+        // It deliberately carries one embedding model: an empty `models` list
+        // would fall back to the full embedded claude catalog and register
+        // real chat models, breaking the no-chat-model invariant above.
+        let claude: ClientConfig = serde_yaml::from_str(
+            "type: claude\nmodels:\n  - name: test-claude-embedder\n    type: embedding\n",
+        )
+        .unwrap();
         let config = AppConfig {
-            clients: vec![client],
+            clients: vec![client, claude],
             ..AppConfig::default()
         };
         let _ = list_client_names(&config);