feat: add NeedsRawMode method to AI vendor interface

## CHANGES

- Add NeedsRawMode to Vendor interface
- Implement NeedsRawMode in all AI clients
- Return false for all implementations
- Support model-specific raw mode detection
- Enable future raw mode requirements

plugins/ai/anthropic/anthropic.go

@@ -205,3 +205,7 @@ func (an *Client) toMessages(msgs []*goopenai.ChatCompletionMessage) (ret []anth
 
 	return anthropicMessages
 }
+
+func (an *Client) NeedsRawMode(modelName string) bool {
+	return false
+}

plugins/ai/azure/azure.go

@@ -41,3 +41,7 @@ func (oi *Client) ListModels() (ret []string, err error) {
 	ret = oi.apiDeployments
 	return
 }
+
+func (oi *Client) NeedsRawMode(modelName string) bool {
+	return false
+}

plugins/ai/dryrun/dryrun.go

@@ -90,3 +90,7 @@ func (c *Client) Setup() error {
 func (c *Client) SetupFillEnvFileContent(_ *bytes.Buffer) {
 	// No environment variables needed for dry run
 }
+
+func (c *Client) NeedsRawMode(modelName string) bool {
+	return false
+}

plugins/ai/exolab/exolab.go

@@ -43,3 +43,7 @@ func (oi *Client) ListModels() (ret []string, err error) {
 	ret = oi.apiModels
 	return
 }
+
+func (oi *Client) NeedsRawMode(modelName string) bool {
+	return false
+}

plugins/ai/gemini/gemini.go

@@ -143,6 +143,10 @@ func (o *Client) extractText(response *genai.GenerateContentResponse) (ret strin
 	return
 }
 
+func (o *Client) NeedsRawMode(modelName string) bool {
+	return false
+}
+
 func toMessages(msgs []*goopenai.ChatCompletionMessage) (systemInstruction *genai.Content, messages []genai.Part) {
 	if len(msgs) >= 2 {
 		systemInstruction = &genai.Content{

plugins/ai/lmstudio/lmstudio.go

@@ -345,3 +345,7 @@ func (c *Client) GetEmbeddings(ctx context.Context, input string, opts *common.C
 	embeddings = result.Data[0].Embedding
 	return
 }
+
+func (c *Client) NeedsRawMode(modelName string) bool {
+	return false
+}

plugins/ai/ollama/ollama.go

@@ -138,3 +138,7 @@ func (o *Client) createChatRequest(msgs []*goopenai.ChatCompletionMessage, opts
 	}
 	return
 }
+
+func (o *Client) NeedsRawMode(modelName string) bool {
+	return false
+}

plugins/ai/openai/openai.go

@@ -123,6 +123,10 @@ func (o *Client) Send(ctx context.Context, msgs []*goopenai.ChatCompletionMessag
 	return
 }
 
+func (o *Client) NeedsRawMode(modelName string) bool {
+	return false
+}
+
 func (o *Client) buildChatCompletionRequest(
 	inputMsgs []*goopenai.ChatCompletionMessage, opts *common.ChatOptions,
 ) (ret goopenai.ChatCompletionRequest) {

plugins/ai/vendor.go

@@ -14,4 +14,5 @@ type Vendor interface {
 	ListModels() ([]string, error)
 	SendStream([]*goopenai.ChatCompletionMessage, *common.ChatOptions, chan string) error
 	Send(context.Context, []*goopenai.ChatCompletionMessage, *common.ChatOptions) (string, error)
+	NeedsRawMode(modelName string) bool
 }