feat: model selection for given provider (#57)

* feat: model selection for given provider

* tweak: adjust cfg validation func, remove duplicated logic, consolidate agent updating into agent.go

* tweak: make the model dialog scrollable, adjust padding slightly for modal"

* feat: add provider selection, add hints, simplify some logic, add horizontal scrolling support, additional scroll indicators"

* remove nav help

* update docs

* increase number of visible models, make horizontal scroll "wrap"

* add provider popularity rankings

1 files changed, 20 insertions, 0 deletions

diff --git a/internal/llm/agent/agent.go b/internal/llm/agent/agent.go
index c5f024073..80dfeb0fd 100644
--- a/internal/llm/agent/agent.go
+++ b/internal/llm/agent/agent.go
@@ -42,6 +42,7 @@ type Service interface {
 	Cancel(sessionID string)
 	IsSessionBusy(sessionID string) bool
 	IsBusy() bool
+	Update(agentName config.AgentName, modelID models.ModelID) (models.Model, error)
 }
 
 type agent struct {
@@ -436,6 +437,25 @@ func (a *agent) TrackUsage(ctx context.Context, sessionID string, model models.M
 	return nil
 }
 
+func (a *agent) Update(agentName config.AgentName, modelID models.ModelID) (models.Model, error) {
+	if a.IsBusy() {
+		return models.Model{}, fmt.Errorf("cannot change model while processing requests")
+	}
+
+	if err := config.UpdateAgentModel(agentName, modelID); err != nil {
+		return models.Model{}, fmt.Errorf("failed to update config: %w", err)
+	}
+
+	provider, err := createAgentProvider(agentName)
+	if err != nil {
+		return models.Model{}, fmt.Errorf("failed to create provider for model %s: %w", modelID, err)
+	}
+
+	a.provider = provider
+
+	return a.provider.Model(), nil
+}
+
 func createAgentProvider(agentName config.AgentName) (provider.Provider, error) {
 	cfg := config.Get()
 	agentConfig, ok := cfg.Agents[agentName]